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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 30506. Отображено 100.
19-01-2012 дата публикации

Communication device in communication network and communication control method

Номер: US20120014260A1
Автор: Naoki Enomoto
Принадлежит: NEC Corp

A communication control method and a communication device are provided by which the communication quality of an upper layer can be ensured at a lower layer. The communication device that is connected to another communication device to constitute a network, includes a upper-layer quality detection section ( 105, 106 ) that detects quality information of communication traffic of an upper layer higher than a predetermined layer, and a lower-layer control section ( 107 ) that controls communication of the predetermined layer based on the quality information on the upper layer so as to guarantee communication quality of the upper layer. When a plurality of paths passing through the communication device coexist, the lower-layer control section can share the quality information of the upper layer of these paths in respect to path control and further can switch the route of a path other than a path in which the communication quality of the upper layer has degraded.

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Номер записи: 1
19-01-2012 дата публикации

Communications network

Номер: US20120014291A1
Автор: Riccardo Matinotti
Принадлежит: Telefonaktiebolaget LM Ericsson AB

A node for a communications network, the node comprising a plurality of ports and a processor. The processor configured to determine that a first status change signal, indicative of a topology status change in the network, has been received, and the processor configured to decide from at least an origin of the first status change signal to output a second status change signal to only a subset of possible destination nodes.

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Номер записи: 2
02-02-2012 дата публикации

Apparatus and method for synchronized networks

Номер: US20120030360A1
Автор: Ray W. Sanders
Принадлежит: Individual

An apparatus and method for network routing is provided. Synchronized networks are disclosed which enable fast connection set up and release in a tiered hierarchy of circuit switched nodes. Nodes in the network aggregate and disaggregate data according to a transform algorithm allowing for dynamic frame and frame segment sizing. Connections within the network are organized by paired connections performing aggregation and disaggregation according to control vectors.

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Номер записи: 3
09-02-2012 дата публикации

System and method for transport control protocol in a multi-chassis domain

Номер: US20120033541A1
Автор: Anand Vinayagam, Chung-Hua Amy Chang, Roberto H. Jacob Da Silva
Принадлежит: Alcatel Lucent USA Inc

Aggregation switches connected to an edge node by a multi-chassis link aggregation group, wherein the aggregation switches are connected by a virtual fiber link that provides a connection for exchange of information between the Aggregation Switches regarding MAC addressing to synchronize MAC address tables. A transport control protocol defines a VLAN and multicast group of ports on the Aggregation Switch to receive management or control packets.

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Номер записи: 4
09-02-2012 дата публикации

Virtual ip interfaces on multi-chassis link aggregates

Номер: US20120033672A1
Автор: Bruce R. Jones, Gregory G. Page, Roberto H. Jacob Da Silva, Sahil P. Dighe, Srinivas V. Tyamagondlu
Принадлежит: Alcatel Lucent USA Inc

Aggregation Switches connected via a virtual fabric link (VFL) are each active and each coupled to a multi-chassis link aggregate group (MC-LAG), which is assigned to a multi-chassis link aggregate group virtual local area network (MC-LAG VLAN). A virtual Internet Protocol (IP) interface is allocated to the MC-LAG VLAN and configured on both Aggregation Switches

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Номер записи: 5
16-02-2012 дата публикации

Automated traffic engineering for fat tree networks

Номер: US20120039161A1
Автор: David I. Allan, Scott A. Mansfield
Принадлежит: Individual

Embodiments of a method implemented in at least one fat tree network node for improved load distribution, wherein the node is one of a plurality of fat tree network nodes in a fat tree network each of which implement a tie-breaking process to produce minimum cost trees, is described. In some embodiments, a spanning tree computation for each root node of the fat tree network in order from a lowest ranked root node to a highest ranked node is performed, a filtering database for each root node of the fat tree network, wherein the filtering database includes a set of media access control (MAC) addresses of the leaf nodes of the fat tree network generated, and link utilization for each computed tree to use as a prefix to link identifiers used for at least one tie-breaking algorithm added.

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Номер записи: 6
23-02-2012 дата публикации

Dynamic rerouting of data paths in a wireless communication network

Номер: US20120044804A1
Автор: Fred Delaplace, Moshiur Rahman
Принадлежит: AT&T INTELLECTUAL PROPERTY I LP

A system and methodology that dynamically reroutes active communications sessions between a user equipment (UE) and a wireless network. In particular, the system can determine a current or impending fault condition and reroute a data path for network traffic to another service. Moreover, the system can identify a failed element in a wireless network and deny access and divert traffic until the element is restored. Further, the system can issue an alert to a user interface of the wireless network with information associated with a fault condition, a failed element, or a restored element.

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Номер записи: 7
15-03-2012 дата публикации

Short-range wireless networks

Номер: US20120063389A1
Автор: Saied Abedi
Принадлежит: Fujitsu Ltd

A wireless network of devices comprising a relay start device, an intermediate device and a relay end device, information being communicated wirelessly in use between the relay start device and the relay end device via the intermediate device, wherein: the intermediate device comprises control means and transmission means, the control means being operable to cause the intermediate device transmission means to transmit an indication of connection stability as a function of at least one connection stability parameter of the intermediate device.

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Номер записи: 8
22-03-2012 дата публикации

Method and apparatus to improve ldp convergence using hierarchical label stacking

Номер: US20120069745A1
Автор: Pramodh D'souza, Sriganesh Kini
Принадлежит: Individual

A method for improving LDP (Label Distribution Protocol) convergence time in an MPLS (Multi-Protocol Label Switching) network is described. An hierarchical LSP is established to transport packets belonging to a FEC attached to an egress LSR. The hierarchical LSP includes an egress LSR LSP that is common for each of the FECs attached to the egress LSR and forms a path from the ingress LSR through one or more intermediate LSRs to the egress LSR. The egress LSR LSP is used when label switching packets destined for the FECs attached to the egress LSR. The hierarchical LSP also includes a unique FEC LSP for each FEC that is used by the egress LSR to identify and forward packets to that FEC. Responsive to a topology change that changes a next-hop of the ingress LSR to reach the egress LSR, the ingress LSR modifies an entry in a forwarding structure to change the next-hop for the egress LSR LSP and does not modify substantially any forwarding structure entities for the FEC LSPs. LDP convergence time is reduced through a reduction of forwarding structure modifications after the topology change.

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Номер записи: 9
29-03-2012 дата публикации

Fast flooding based fast convergence to recover from network failures

Номер: US20120075988A1
Автор: Albert Jining Tian, Wenhu Lu
Принадлежит: Individual

A router detects a network failure and responsive to that failure, floods a fast failure notification message out a set of interfaces of the router. The fast failure notification message includes information that identifies the network failure and includes as its source MAC (Media Access Control) address a MAC address that is assigned to an interface that is coupled with the detected network failure and is not part of the set of interfaces of the router. The router updates a routing table to reflect the network failure. The flooding of the fast failure notification message is performed prior to completion of the routing table update to reflect the network failure.

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Номер записи: 10
29-03-2012 дата публикации

Method and apparatus for traffic engineering in shortest path bridged networks

Номер: US20120076014A1
Автор: Nigel Lawrence Bragg
Принадлежит: Ciena Corp

A method and apparatus for diverting traffic in a communications network are disclosed. According to one aspect, the invention provides a communications network with a first node and a second node. Connecting these two nodes is a first set of intermediate nodes on a first path (the true shortest path) and a second set of intermediate nodes on a second alternate path. At a first node, a first processor determines whether a packet arriving at the first node must transit the second node. If so, the base virtual local area network (VLAN) identifier (VID) of the packet is replaced by a first VID, and the packet is transmitted along the second path through the second set of intermediate nodes to the second node. At the second node, a second processor determines whether a packet arriving at the second node must transit the first node. If so, the base VID of the packet is replaced by a second VID different from the first VID and different from the base VID, and the packet is transmitted along the second path through the second set of intermediate nodes to the first node.

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Номер записи: 11
05-04-2012 дата публикации

Apparatus and method for protection switching for mesh topology

Номер: US20120082026A1
Автор: Jeong Dong Ryoo, Tae Sik Cheung
Принадлежит: Electronics and Telecommunications Research Institute ETRI

Provided are a shared mesh protection switching apparatus and method. The shared mesh protection switching apparatus includes a plurality of linear protection switching processors allocated to the linear protection domains respectively and configured to provide a switching report signal in response to fault occurrence in the corresponding linear protection domains or a linear protection switching operation, and perform a function of limiting use of the shared section in response to a provided lock signal, and a mesh protection switching processor configured to select at least one linear protection domain to be limited in use of the network resources of the shared section according to a predetermined reference when the switching report signal is provided and provide the lock signal to a linear protection switching processor corresponding to the at least one selected linear protection domain.

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Номер записи: 12
05-04-2012 дата публикации

Methods and apparatus for data traffic offloading at a router

Номер: US20120082161A1
Автор: Flemming Andreasen, Jayaraman Iyer, Kent Leung, Michel Khouderchah, Timothy Stammers
Принадлежит: Cisco Technology Inc

This disclosure relates to a system and method for offloading selected data traffic in logical tunnels to the Internet. The offloading provides another data path for selected data traffic that can relieve the burden on a mobile operator's network, such as the backhaul and core networks. As the proliferation of data rich content and increasingly more capable mobile devices has continued, the amount of data communicated over mobile operator's networks has increased. Upgrading the existing network that was designed for voice calls is not desirable or practical for many mobile operators. This disclosure provides systems and methods for offloading data to the Internet at a router to relieve congestion on the mobile operator's network.

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Номер записи: 13
12-04-2012 дата публикации

Optimizing Distributed Computer Networks

Номер: US20120089664A1
Автор: Or Igelka
Принадлежит: SAP Portals Israel Ltd

In one general embodiment, a computer-implemented method for managing a distributed computer network performed by one or more processors includes the steps of: receiving a request from a client in the distributed computer network for a network service; optimizing a delivery of the requested network service to the client from a server in the distributed computer network; and monitoring an execution of the delivery of the network service.

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Номер записи: 14
19-04-2012 дата публикации

Multiplexing and demultiplexing radio channels

Номер: US20120093057A1
Автор: Amit Barave, Marcelo Oliveira, Steven Christenson
Принадлежит: Cisco Technology Inc

In one embodiment, a method and apparatus of multiplexing and demultiplexing radio channels includes receiving data through at least one multicast media channel available for use in an Internet Protocol Interoperability and Communications System (IPICS) comprising multiple communication endpoints linkable to a Land Mobile Radio (LMR) in the IPICS; channel mapping the at least one multicast media channel to multiple media channels of the LMR; receiving an audio signal through the at least one multicast media channel; controlling access to the LMR by applying communication access control policies based on the received data upon reception of the audio signal; and operatively linking the LMR to a specified endpoint through the at least one multicast media channel based on the communication access control policies.

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Номер записи: 15
19-04-2012 дата публикации

Data transfer device

Номер: US20120093171A1
Автор: Akira Sakurai, Atsuya Yamashita, Hiroaki Nakajima, Tsutoma Mieno
Принадлежит: NEC Corp

A data transfer device 210 is equipped with a plurality of communication ports 211 a and 211 b, a communication establishment processor 212, and a communication maintenance processor 213. The communication establishment processor 212 transmits and receives communication establishing information for establishing communication with an external device connected via the communication port to and from the external device. The communication maintenance processor 213 is configured to operate independently of the communication establishment processor 212 and, every time a predetermined transmission period elapses, transmits communication maintaining information for maintaining the establishment of communication with the external device, to the external device. In a state that communication with a plurality of external devices via the plurality of communication ports is established, the data transfer device 210 transmits data received from one of the plurality of external devices to the other one of the plurality of external devices.

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Номер записи: 16
19-04-2012 дата публикации

System and method employing an agile network protocol for secure communications using secure domain names

Номер: US20120096541A1
Автор: Edmund Colby Munger, Michael Williamson, Robert Dunham Short, III, Victor Larson
Принадлежит: Virnetx Inc

A system for connecting a first network device and a second network device includes one or more servers. The servers are configured to: (a) receive, from the first network device, a request to look up a network address of the second network device based on an identifier associated with the second network device; (b) determine, in response to the request, whether the second network device is available for a secure communications service; and (c) initiate a virtual private network communication link between the first network device and the second network device based on a determination that the second network device is available for the secure communications service, wherein the secure communications service uses the virtual private network communication link.

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Номер записи: 17
26-04-2012 дата публикации

Method and arrangement for enabling link status propagation

Номер: US20120099427A1
Автор: Wei-Ping Huang
Принадлежит: Telefonaktiebolaget LM Ericsson AB

A system and method for implementation of a process that propagates a link status across a media converter system implemented in a telecom and/or data com network is provided. More specifically, the system comprise XAUI and PMA/PMD interfaces that support both a copper cable and the different types of SFP+/SFP fiber-optic pluggable modules for accessing a host system and a remote link partner, respectively. With the method, the link statuses at both the copper and fiber-optic link sides of the media converter system are being monitored, such that a change of link status at one side of the media converter system will automatically be propagated across the media converter system to the other side, by dynamically enabling or disabling a respective XAUI or PMD transmitter at the opposite side of a physical layer device (PHY) of the media converter system.

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Номер записи: 18
03-05-2012 дата публикации

Technique establishing a forwarding path in a network system

Номер: US20120106322A1
Автор: Balázs Peter Gerö, Janos Farkas, Panagiotis Saltsidis, Zhemin Ding
Принадлежит: Individual

A method and network for determining an interconnect node for establishing a forwarding path for service based data within a network system. The method includes assigning, interconnect node status information to network interconnect nodes, wherein a network interconnect node to which a passive status is assigned is only allowed to transmit service based data between an external link and another interconnect node of the network, or between two other interconnect nodes of the network. Only a network interconnect node with active status is allowed to send or receive service based data to or from the network. The method includes determining, for a given service, an interconnect node with active status for establishment of a forwarding path including the interconnect node with active status and an external link, wherein the determination is based on the respective status information assigned to the network interconnect nodes for the service.

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Номер записи: 19
10-05-2012 дата публикации

Restarting Network Reachability Protocol Sessions Based on Transport Layer Authentication

Номер: US20120117248A1
Автор: Anantha Ramaiah, Brian Weis, Keyur Patel, Mahesh Jethanandani
Принадлежит: Cisco Technology Inc

In an embodiment, a method comprises establishing a first data communications session with a first router. In response to receiving a first request to establish a second data communications session, a probe message that is configured to test whether the first data communications session or the first router is responsive is sent to the first router. In response to determining that the first router has not acknowledged the probe message before a probe timer has expired, and receiving a second request to establish the second data communications session, the second data communications session with the first router is established and a state for the first data communications session is deleted.

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Номер записи: 20
17-05-2012 дата публикации

Ldp igp synchronization for broadcast networks

Номер: US20120120847A1
Автор: Sriganesh Kini, Wenhu Lu
Принадлежит: Individual

A network element that has a broadcast interface to a broadcast network becoming operational determines whether at least one alternate path exists to the broadcast network. The broadcast interface is to carry traffic on a label switched path. If an alternate path exists, the broadcast interface will not be advertised to the broadcast network until label distribution protocol (LDP) is operational with all neighbors on the broadcast interface.

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Номер записи: 21
17-05-2012 дата публикации

Methods and apparatuses for path selection in a packet network

Номер: US20120120951A1
Автор: Anoop J. Mathew, Bradley R. Kangas, Jai Harpalani, James N. Turner, Kenneth S. Mizialko, Mark A. Richmond
Принадлежит: Tellabs Operations Inc

Embodiments including methods, systems, and apparatuses for distributing, processing, and reacting to path information distributed via a service-agnostic packet fabric for the purpose of enabling path selection are disclosed. By configuring two ingress line cards to send path quality words to each other via the switch fabric, compare the path quality words, and determine whether to transmit traffic to an egress line card via the switch fabric based on the comparison of the path quality words, the embodiments enable a central switch fabric to be unaware of the paths that it carries, and enable both ingress and egress bandwidth of the switch fabric to be sized according to the facilities for which it is terminating. The switch fabric does not need to support working and protection paths simultaneously in some embodiments, allowing it to be scaled appropriately to termination facilities.

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Номер записи: 22
24-05-2012 дата публикации

Backbone network with policy driven routing

Номер: US20120127995A1
Автор: Abhishek Singh, Albert G. Greenberg, David A. Maltz, Ming Zhang, Parantap Lahiri, Srinivas Krishnan
Принадлежит: Microsoft Corp

A source device obtains a data packet that includes both a destination address and a payload. The source device selects an exit point address of multiple exit point addresses corresponding to the destination address based on one or more policies. The source device encapsulates the data packet with a header that includes the selected exit point address, and the encapsulated data packet is provided to the backbone network. The encapsulated data packet is routed through the backbone network based on the exit point address, and an edge router of the backbone network identifies an interface of the edge router that corresponds to the exit point address. The header is removed from the encapsulated data packet, and the data packet is added to a buffer of the interface for routing to one or more other devices outside of the backbone network.

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Номер записи: 23
24-05-2012 дата публикации

Method for controlling times of refreshing ethernet forwarding database

Номер: US20120130959A1
Автор: Shaoyong Wu
Принадлежит: ZTE Corp

The present invention discloses a method for controlling the times of refreshing an Ethernet Forwarding Database, and the method includes: pre-configuring the time of an address refresh pause timer, receiving a first request for refreshing the Ethernet Forwarding Database; refreshing the Ethernet Forwarding Database and starting the address refresh pause timer; and receiving subsequent requests for refreshing the Ethernet Forwarding Database successively, detecting, each time when receiving the request for refreshing the Ethernet Forwarding Database, whether the address refresh pause timer expires, if yes, then proceeding to step 2, otherwise not performing refresh. The present invention overcomes the problem that the switching is unstable caused by a large amount of broadcast frames which are generated by the nodes refreshing the Ethernet Forwarding Database frequently when switching occurs to the network links

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Номер записи: 24
31-05-2012 дата публикации

Method, apparatus, and system for active-standby switchover

Номер: US20120134258A1
Автор: Changzhi Guo, HUI Ni, Li Liu, Zhibin Zhao
Принадлежит: Huawei Technologies Co Ltd

The present invention relates to the field of communication technologies and discloses a method, an apparatus, and a system for active-standby switchover. The method includes: copying at least one packet group to a standby board; recording the copied packet group and generating a transmission rule chain table of an active board according to a sequence of copying, so that the standby board generates a transmission rule chain table of the standby board which is the same as the active transmission rule chain according to the sequence of copying; and transmitting the packet group according to the sequence of the transmission rule chain table of the active board. By using the method, resuming transmission from a breakpoint upon an active-standby switchover is enabled.

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Номер записи: 25
14-06-2012 дата публикации

Minimizing the Number of Not-Via Addresses

Номер: US20120147736A1
Автор: Ian Michael Charles Shand, Stewart Frederick Bryant
Принадлежит: Cisco Technology Inc

In an embodiment, a method comprises determining a set of protected components that are associated with a notifying node; determining a single network repair address for the set of protected components, wherein the single network repair address is for use in response to unavailability of any of the protected components when transmitting network traffic to the notifying node; assigning the single network repair address to each of the protected components; wherein the notifying node is an internetworking device and wherein the method is performed by one or more processors.

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Номер записи: 26
14-06-2012 дата публикации

Method and system for ethernet path protection switching

Номер: US20120147741A1
Автор: Yuehua Wei
Принадлежит: ZTE Corp

A switching method for Ethernet path protection is provided in the disclosure. The method includes: setting a group of Traffic Engineering Service Instances (TESIs) protected by a protection group; detecting statuses of a working entity and a protection entity; implementing the path protection switching according to an outbound port configured for Ethernet Switching Path (ESP) of the TESI at the endpoint of the protection group and in conjunction with a corresponding protection switching mechanism selected in current status detection. A switching system for Ethernet path protection is also provided in the disclosure, wherein a switching unit is configured to implement the path protection switching according to the outbound port configured for the ESP of the TESI at the endpoint of the protection group and in conjunction with the corresponding protection switching mechanism selected in current status detection. The method and system of the disclosure can enhance the speed of fault recovery, reduce nodes for the protection switching, be beneficial to network optimization, and ensure the reliability of end-to-end traffic.

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Номер записи: 27
14-06-2012 дата публикации

Method for Time Division Multiplex Service Protection

Номер: US20120148230A1
Автор: Dezhi Zhang, Ruichun Dai
Принадлежит: ZTE Corp

The present application provides a method for time division multiplex service protection. The method includes: on an OLT in a passive optical network, a working uplink port and a protection uplink port are set for a time division multiplex service and a protection group is created for the working uplink port and the protection uplink port; when a service flow protection for the time division multiplex service is triggered, the time division multiplex service flow is switched from the working uplink port to the protection uplink port, therefore realizing the protection for the time division multiplex service flow. The present application provides an uplink channel protection mechanism for important services in an access system, such as the time division multiplex service, which needs no protection switching protocol, and makes the service recovery time stand within 50 ms, thereby realizing fast and nondestructive recovery of the time division multiplex service.

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Номер записи: 28
14-06-2012 дата публикации

Network elements, integrated circuits and methods for routing control

Номер: US20120151030A1
Автор: ERIK Guttman, Haris Zisimopoulos
Принадлежит: SAMSUNG ELECTRONICS CO LTD

A method for identifying whether a selective internet protocol transport opportunity (SIPTO) route is allowed to be used by at least one wireless communication unit comprises, at a core network element: storing subscription profile data associated with the at least one wireless communication unit in a home subscriber server (HSS) database, where the subscription profile data comprises an indication of whether the wireless communication unit has access rights to use a SIPTO route, and generating a SIPTO indicator for informing at least one network element that the at least one wireless communication unit is allowed to use the SIPTO route.

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Номер записи: 29
14-06-2012 дата публикации

Dynamic Fault Detection and Repair in a Data Communications Mechanism

Номер: US20120151247A1
Автор: Frank D. Ferraiolo, Michael B. Spear, Robert J. Reese, Susan M. Rubow, William R. Kelly
Принадлежит: International Business Machines Corp

A communications link of multiple parallel communications lines includes at least one redundant line. In a first aspect, the lines are periodically recalibrated one at a time while the others carry functional data. If a fault is detected, the faulty line is disabled and the remaining previously calibrated lines transmit functional data. In a second aspect, impending line malfunction is detected from anomalies during calibration. In a third aspect, line malfunction is detected from receiver circuit output by determining a logical lane upon which each detected error occurs, and by mapping the logical lane to a physical line currently carrying the logical lane data.

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Номер записи: 30
21-06-2012 дата публикации

Dynamic Expelling of Child Nodes in Directed Acyclic Graphs in a Computer Network

Номер: US20120155276A1
Автор: Jean-Philippe Vasseur, Shmuel Shaffer
Принадлежит: Cisco Technology Inc

In one embodiment, a parent node in a directed acyclic graph (DAG) in a computer network may detect congestion from its child nodes. In response, the parent node may determine particular child nodes to expel from the parent node based on the congestion, and notifies the expelled child nodes that they must detach from the parent node in response to dynamically detecting congestion (e.g., to find a new parent, excluding the parent node and optionally any nodes in the vicinity). In another embodiment, a child node receives a detach request packet from a current parent node that indicates that the child node is expelled from using the current parent node. In response, the child node triggers a new parent selection to select a new parent node that specifically excludes the current parent node (e.g., and optionally any nodes in the parent's vicinity).

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Номер записи: 31
28-06-2012 дата публикации

Techniques for selecting paths and/or trunk ports for forwarding traffic flows

Номер: US20120163389A1
Автор: HUI Zhang, Vahid Naraghi, Yuen Wong
Принадлежит: Foundry Networks LLC

Techniques that offer enhanced diversity in the selection of paths (e.g., ECMP paths) and/or ports from ports associated with trunks for forwarding data traffic. In one embodiment, one or more functions are used to generate a result. A first portion of the generated result may be used as an index (e.g., ECMP index) for selecting a path (e.g., an ECMP path) from multiple possible paths for forwarding a packet. A second portion of the generated result, different from the first portion, may be used as an index (trunk index) for selecting an output port from multiple output ports associated with a trunk for forwarding a packet. In this manner, selected portions of the generated result may be used as indices, one for selecting a path and another for selecting a trunk port for forwarding packets such that the two indices are not the same and are not dependent upon one another.

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Номер записи: 32
28-06-2012 дата публикации

Apparatus and method for rerouting multiple traffics

Номер: US20120163797A1
Автор: Jiayu Wang
Принадлежит: ZTE Corp

The disclosure discloses an apparatus and method for rerouting multiple traffics. The apparatus includes a path computation unit and a traffic path incorporation unit, the path computation unit forwards a received uniform route computation notification message including multiple pieces of failed traffic connection information to the traffic path incorporation unit, and also forwards a route inquiry request transmitted from the head node of the fault traffic to the traffic path incorporation unit; the traffic path incorporation unit analyzes and detects the failed traffic connection information according to traffic incorporating and route inquiry statistic algorithm, and uniformly obtains and records the recovery route information from the path computation unit; when receiving the route inquiry request forwarded by the path computation unit, the traffic path incorporation unit is further configured to search the record according to the route inquiry request, and return the found corresponding recovery route information to the head node which requests the recovery through the path computation unit. The disclosure uses a incorporating and uniform route inquiry method, the resource loss of the path computation unit is reduced, and the efficiency of link restoration is improved.

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Номер записи: 33
05-07-2012 дата публикации

Method and Inquiring Device for Implementing Switching in Network Fault

Номер: US20120170446A1
Автор: Bo Yuan, LIANG FAN, Wei Sun
Принадлежит: ZTE Corp

A method for implementing switching when the network is faulted is disclosed, and the method includes: establishing a quick detection mechanism between non-querier and querier; the non-querier using the detection mechanism for performing a real-time detection on the querier and downlink of the querier; switching the non-querier to be the querier when the non-querier detects that the querier or the downlink of the querier is faulted. A querier is further disclosed. With the method, it can complete a quick switching of the querier and a quick transmission of a multicast flow when the querier or the downlink thereof is faulted, thereby reducing the interrupt time of users receiving the multicast flow, implementing a quick protection of a multicast service, and improving the service experience for the user.

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Номер записи: 34
12-07-2012 дата публикации

Network failover protection

Номер: US20120176889A1
Автор: Daniel Sjoberg, Ian Cleary
Принадлежит: Level 3 Communications LLC

Embodiments generally disclosed herein include a computer-implemented method for providing network failover functionality. The method includes providing service over a transport network from a first customer location to a second customer location. The method further includes detecting a network failure in the transport network and, in response, provisioning service over an Internet Protocol (IP) transit network from the first customer location to the second customer location. In one example embodiment, the network failure can be caused by a link failure in the transport network. In another example embodiment, the network failure can be used by a node failure in the transport network (e.g., failure of a dense wavelength division multiplexing device).

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Номер записи: 35
12-07-2012 дата публикации

System and method for variable-size table construction applied to a table-lookup approach for load-spreading in forwarding data in a network

Номер: US20120179800A1
Автор: David Ian Allan, Eric Ward Gray, Joel Halpern, Scott Andrew Mansfield
Принадлежит: Individual

A network element disposed in a network, where the network element implements a process to manage load distribution across a plurality of network interfaces of the network. The network element redirects traffic flow directed toward the plurality of network interfaces in response to changes in configuration of the plurality of network interfaces, where each traffic flow is a set of protocol data units (PDUs), having an ordered delivery requirement, and where the PDUs are transmitted across the network between a source node and a destination node. The redirection process minimizes data traffic flow disruption when the load distribution is determined using a set of load distribution tables instead of a hashing algorithm.

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Номер записи: 36
19-07-2012 дата публикации

Wireless Relay Module Having Emergency Call Functionality

Номер: US20120184237A1
Автор: John HOLSTE, Robert B. Gaines, Thomas Lewis
Принадлежит: TYCO HEALTHCARE GROUP LP

A system for networked communications between a series of medical devices, wireless relay modules, and a remote device wireless relay network and an internet-accessible wireless communication network. At least one relay module includes a receiver, a first transmitter coupled to the wireless relay network, a second transmitter coupled to the internet-accessible wireless communication network, and a controller. The controller determines whether the internet-accessible wireless communications network is accessible. If accessible, then medical device data is transmitted to a remote device over that network using the second transmitter. If not accessible, then the first transmitter is used to transmit medical device data to another wireless relay module over the wireless relay network. Additionally, the controller analyzes the medical device data to determine whether an emergency condition exists, and transmits the medical device data to an emergency responder if such condition occurs together with location data for an associated medical device.

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Номер записи: 37
09-08-2012 дата публикации

Apparatus and method for transferring a packet

Номер: US20120201128A1
Автор: Bheom Soon Joo
Принадлежит: Electronics and Telecommunications Research Institute ETRI

A packet transferring apparatus and method that may be applied to all packet systems operated on a packet transport network, to ensure the same level of reliability and availability as a circuit network. A path providing unit may acquire packet transfer path information regarding a packet transfer path from a transport network, and a subscriber interface unit may generate transport packet data by adding the packet transfer path information to packet data received from a subscriber network and may output the transport packet data. A packet switch may switch the transport packet data inputted from the subscriber interface unit, and a network interface unit may transmit the transport packet data switched by the packet switch, to the transport network along the packet transfer path.

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Номер записи: 38
09-08-2012 дата публикации

System and method for selecting network egress

Номер: US20120201139A1
Автор: Michael K. Bugenhagen, William L. Wiley
Принадлежит: Embarq Holdings Co LLC

A system and method for selecting communications routing. Network performance information is gathered from a communications network using performance information packet data packets. A network connection offering the best quality of service is selected between the communications network and an outside network based on the network performance information. The network connection is established between the communications network and the outside network for routing communications.

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Номер записи: 39
16-08-2012 дата публикации

Recovery mechanism for point-to-multipoint traffic

Номер: US20120207017A1
Автор: Daniele Ceccarelli, Diego Caviglia, Francesco Fondelli
Принадлежит: Individual

A connection-oriented network ( 5 ) has a point-to-multipoint working path ( 10 ) between a source node (A) and a plurality of destination nodes (B-F). On detection of a failure in the working path, an indication of the failure is sent to a first node (e.g. node A) identifying the point of failure. The indication is sent via a control plane of the network. The first node selects one of a plurality of point-to-multipoint backup paths ( 21 - 25 ) based on the point of failure. Each backup paths connects the first node to the plurality of destination nodes. There is a point-to-multipoint backup path ( 21 - 25 ) for each of a plurality of possible points of failure along the working path. The backup paths ( 21 - 25 ) can be pre-configured to carry traffic in advance of the detection of failure. Alternatively, the first node can signal to nodes of the selected backup path to fully establish the backup path when it is required.

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Номер записи: 40
06-09-2012 дата публикации

Systems and methods for distributed data routing in a wireless network

Номер: US20120224474A1
Автор: Nurettin Burcak BESER
Принадлежит: Individual

Various systems and methods described herein relate to distributed data routing over a wireless network. An exemplary method comprises receiving routing data by a routing element of a point to point wireless network, the routing data comprising routing criteria and a plurality of path identifiers which identify a plurality of paths through the wireless network, storing the routing data by the routing element, receiving a packet of data, determining a destination node of the packet of data, the destination node being identified using the routing data as accessible by two or more paths of the plurality of paths, determining, based on the routing criteria of the routing data, at least one path of the plurality of paths to transmit the packet of data to reach the destination node, and transmitting the packet of data to a first node of the determined at least one path of the wireless network.

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Номер записи: 41
13-09-2012 дата публикации

Method and apparatus for implementing control of multiple physically dual homed devices

Номер: US20120230183A1
Автор: David Allan, Peter Ashwood-Smith
Принадлежит: ROCKSTAR BIDCO LP

A ring control protocol is used to establish a separate control plane for a plurality of physically dual homed devices to enable collections of dual homed devices to be represented by a single pair of addresses into the attached routed Ethernet network. The gateway devices analyze the passing ring control packets to create direct mappings for data packets to the routed Ethernet network. Thus, although the dual homed devices are treated as a ring from a control perspective, the data path is implemented to be direct so that data packets continue to flow directly from the dual homed devices to each of the attached gateway devices. In one embodiment, each of the gateway devices implements a virtual switch and advertises the MAC address of the virtual switch into the routed Ethernet network rather than the MAC addresses of each of the attached Ethernet Switch Units.

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Номер записи: 42
20-09-2012 дата публикации

Method, device and system for processing service traffic based on pseudo wires

Номер: US20120236730A1
Автор: Peng Zhou, Tijun Shi
Принадлежит: Huawei Technologies Co Ltd

The embodiment of the present invention relates to a method, device and system for processing service traffic based on pseudo wires, wherein the method includes: receiving service traffic from a customer edge device ( 101 ); determining a pseudo wire aggregation group corresponding to the service traffic ( 102 ); forwarding the service traffic, according to a local strategy, to a peer device via a pseudo wire in “forwarding” or “active” status in the pseudo wire aggression group, the pseudo wire aggregation group including more than one pseudo wire corresponding to the service traffic ( 103 ). The embodiments of the invention improve average convergence rate of the service traffic and reduce switchover time when a failure occurs in the network.

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Номер записи: 43
27-09-2012 дата публикации

Use of Sub Path Maintenance Elements (SPMES) for Multiprotocol Label Switching (MPLS) Shared Mesh Protection

Номер: US20120243406A1
Автор: David Ian Allan
Принадлежит: Individual

Embodiments of the invention include a computer-implemented method of shared backup path computation in an multiprotocol label switching (MPLS) network, the shared backup path to be used upon a failure of at least one working path of the MPLS network.

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Номер записи: 44
04-10-2012 дата публикации

Methods for sending and processing an sip response

Номер: US20120250497A1
Автор: Olivier Cleuziou, Sebastien Prouvost, Stephane Boizard
Принадлежит: France Telecom SA

Devices, systems, and methods for sending and processing session initiation protocol (SIP) responses are disclosed. According to one aspect, a method for sending an SIP response through a first telecommunications network node is described. The method includes receiving, by means of the first node, a SIP request sent by means of a second node of the network. The method includes detecting an event that interferes with processing of said request by means of the first node. The method further includes sending, to the second node, a SIP response notifying said interference. The method also includes, before the sending step, activating, within the SIP response, a parameter that allows the request to be rerouted, said parameter being configurable by means of the second node.

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Номер записи: 45
04-10-2012 дата публикации

Method, system and computer program product for providing ethernet vlan capacity requirement estimation

Номер: US20120250693A1
Автор: Neil Gilmartin, Steven Allan Wright
Принадлежит: AT&T INTELLECTUAL PROPERTY I LP

A method, system, and computer program product for providing VLAN capacity requirement estimation is provided. The method includes receiving at a computing system a VLAN configuration file that specifies VLAN access ports, VLAN switches and VLAN trunks in a VLAN. A target access port identifier is received at the computing system from a requestor. A target trunk and target switch corresponding to the target access port are determined at the computing system. A bandwidth contribution of the target access port to the VLAN is calculated at the computing system. The calculating is based on a least contribution algorithm that reflects an impact of provisioning the target access port with respect to trunk capacity, and is responsive to the target bandwidth requirement, the target class of service and placement of the target port in the VLAN. The bandwidth contribution is then transmitted to the requestor.

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Номер записи: 46
01-11-2012 дата публикации

Multi-Chassis Link Aggregation on Network Devices

Номер: US20120275297A1
Автор: Krishnamurthy Subramanian
Принадлежит: Dell Force10

A data communication network includes a client device and multiple aggregation devices coupled to each other and the client via links within a link aggregation group (“LAG”) across the aggregation devices. The aggregation devices appear to the client as a single device coupled thereto, and operate in conjunction with each other by assigning at least one different identifier to each of the plurality of separate aggregation devices and storing information including the identifiers to association tables located on each of the aggregation devices. The multiple aggregation devices can be separate switches, and the LAG can include multiple ports across the switches, with a different identifier being assigned to each of the ports in the LAG. A virtual link trunk interface can couple aggregation devices, which can reconfigure communication paths thereacross with respect to the client device using the identifiers in the stored association tables when a LAG link fails.

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Номер записи: 47
08-11-2012 дата публикации

Autonomic network management system

Номер: US20120281528A1
Автор: Sung Su Kim, Won Ki Hong, Young Joon Won
Принадлежит: Academy Industry Foundation of POSTECH

The present invention relates to an autonomic network management system which includes: an active measurement unit that measures and analyzes a network state in an active measurement scheme; a passive measurement unit that measures and analyzes the network state in a passive measurement scheme; an autonomic management control unit that respectively receives the measured and analyzed results of the network from the active measurement unit and the passive measurement unit to determine the network state; and a transmission path control unit that receives a transmission path message from the autonomic management control unit to control a transmission path according to the transmission path message.

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Номер записи: 48
08-11-2012 дата публикации

Mobile service routing in a network environment

Номер: US20120281540A1
Автор: Kevin D. Shatzkamer, Kirk McBean, Muhammad A. Khan
Принадлежит: Cisco Technology Inc

A data flow is received from a mobile network relating to a mobile subscriber. Subscriber data is received for the subscriber identifying a service path corresponding to the subscriber and at least one service policy corresponding to the subscriber, the service path including a set of network service nodes in a plurality of network service nodes. Packets of the data flow are routed according to the service path, the packets corresponding to a request for a resource. At least one packet is appended with service header data identifying the service policy. Each service node performs at least one service based on received request data, each service node in the set of service nodes performing a service defined in a service subscription of the subscriber. At least one particular service node in the set of network service nodes performs a particular service based at least in part on the service policy.

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Номер записи: 49
22-11-2012 дата публикации

Method, apparatus and system for handling node failure

Номер: US20120294155A1
Автор: Caixia Qi, Yu Yin
Принадлежит: Huawei Technologies Co Ltd

Embodiments of the present invention provide a method, an apparatus and a system for handling node failure. The method for handling node failure includes: sending, by an intermediate node, a context processing request message to a remote node when detecting that a first node occurs a failure, where the context processing request message is used to instruct the remote node to delete context information associated with the first node and the intermediate node; and deleting the context information associated with the first node and the intermediate node, by the remote node, according to the request message. The technical solution can enable the remote node to process the context information associated with the first node in time

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Номер записи: 50
29-11-2012 дата публикации

Mpls virtual private network using multiple network cores

Номер: US20120300634A1
Автор: James Uttaro
Принадлежит: AT&T Intellectual Property II LP

Examples of multi-protocol label switching networking using multiple network cores are disclosed. Example methods disclosed herein to route data in a multi-protocol label switching network include providing an incoming data packet in parallel to a plurality of network cores of the multi-protocol label switching network to cause a respective plurality of alternative paths in the plurality of network cores to be determined for routing the incoming data packet, each alternative path being associated with a respective network core, each network core including a respective plurality of routers, obtaining a plurality of weights associated with the plurality of alternative paths, and selecting, based on the plurality of weights, a first alternative path in a first network core to route the incoming data packet in the multi-protocol label switching network, the first alternative path being selected from among the respective plurality of alternative paths in the plurality of network cores.

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Номер записи: 51
29-11-2012 дата публикации

Topology-based consolidation of link state information

Номер: US20120300669A1
Автор: Eitan Zahavi
Принадлежит: MELLANOX TECHNOLOGIES LTD

A method in a network element that forwards packets to destination nodes includes identifying groups of the destination nodes. Respective performance metrics of multiple different candidate network paths, over which the destination nodes in a given group are reachable from the network element, are estimated jointly for all the destination nodes in the given group. A network path is selected from among the candidate network paths based on the estimated performance metrics. The packets addressed to the destination nodes in the given group are forwarded over the selected network path.

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Номер записи: 52
06-12-2012 дата публикации

Management of misbehaving nodes in a computer network

Номер: US20120307624A1
Автор: Jean-Philippe Vasseur, Jonathan W. Hui, Shmuel Shaffer
Принадлежит: Cisco Technology Inc

In one embodiment, a node in a computer network detects a misbehaving node in the computer network based on the misbehaving node acting in violation of one or more rules. As such, the node communicates information regarding the misbehaving node to a network management system (NMS), and then may receive isolation instructions from the NMS regarding how to isolate the misbehaving node from the computer network. Accordingly, the node may perform the isolation instructions. In another embodiment, the NMS receives the communicated information regarding the misbehaving node, and determines whether the misbehaving node should be isolated based on the communicated information. If so, then the NMS determines isolation instructions regarding how to isolate the misbehaving node from the computer network, and transmits them to one or more nodes in the computer network, accordingly.

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Номер записи: 53
06-12-2012 дата публикации

Method and Apparatus For Selecting Between Available Neighbors in a RAPID Alternate Path Calculation

Номер: US20120307625A1
Автор: Hong Zhang, Peter Ashwood Smith, Ravi Ravindran
Принадлежит: ROCKSTAR CONSORTIUM US LP

A weighting process may be used to select between alternate neighbors in a RAPID calculation to enable policy and/or traffic engineering considerations to affect the selection of an alternate path through the network. The information used to weight the neighbors may static administratively assigned weighting information or dynamic weighting information such as local statistical traffic condition information. The process may take into account the amount of traffic being handled by the current primary next hop for the destination, the available capacity of the available alternate neighbors, the ability of the alternate neighbors to handle the additional traffic, and other considerations. Weighting may occur after a set of available loop free alternate neighbors has been determined. Alternatively, weighting may occur before the RAPID calculation has been performed to cause the neighbors to be ordered prior to RAPID processing. This may enable RAPID calculation to stop without considering all available neighbors.

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Номер записи: 54
06-12-2012 дата публикации

Method and apparatus for selecting between multiple equal cost paths

Номер: US20120307832A1
Автор: David Allan, Jerome Chiabaut, Nigel Bragg
Принадлежит: ROCKSTAR BIDCO LP

Each equal cost path is assigned a path ID created by concatenating an ordered set of link IDs which form the path through the network. The link IDs are created from the node IDs on either set of the link. The link IDs are sorted from lowest to highest to facilitate ranking of the paths. The low and high ranked paths are selected from this ranked list as the first set of diverse paths through the network. Each of the link IDs on each of the paths is then renamed, for example by inverting either all of the high node IDs or low node IDs. After re-naming the links, new path IDs are created by concatenating an ordered set of renamed link IDs. The paths are then re-ranked and the low and high re-ranked paths are selected from this re-ranked list as the second set of diverse paths.

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Номер записи: 55
13-12-2012 дата публикации

Method and system for reducing traffic disturbance in a communication network caused by intermittent failure

Номер: US20120315030A1
Автор: Chenjiang Hu, David Traylor, Guoliang Wu, Ladan S. Pickering, Rajnath Singh, Si Long Ho
Принадлежит: Fujitsu Network Communications Inc

A method may include: (i) in response to clearing of a fault on a working path of a protection switching group to which a first network element is interfaced: (a) transitioning, by the first network element, its state to a first state in which a protection path of the protection switching group is active; and (b) initiating, by the first network element, a wait to restore timer, the wait to restore timer having a duration such that upon expiration of the timer, the first network element is configured to switch the working path to active; and (ii) in response to receiving a message from a second network element interfaced to the protection switching group indicating that a failure has occurred on the working path: (a) maintaining, by the first network element, its state in the first state; and (b) continuing, by the first network element, the wait to restore timer.

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Номер записи: 56
10-01-2013 дата публикации

High Availability Device Level Ring Backplane

Номер: US20130010588A1
Автор: David S. Wehrle, Gerald R. Creech, Robert J. Kretschmann
Принадлежит: Rockwell Automation Technologies Inc

A modular, high-availability network for an industrial control system employs a plurality of base modules having backplane and using network ring topology. Base modules may include I/O base modules for communicating with industrial processes or machines, an adapter base module for communicating with a programmable logic controller (PLC) and/or a bus expansion base module for providing additional I/O base modules. Base modules may be arranged side-by-side, having a backplane in a bank. Another embodiment may include having plurality of banks. The network ring topology used by the base modules is normally opened by a ring supervisor at the ring supervisor location. Upon failure of the network, the ring supervisor reconnects the ring to provide an alternative transmission path around the failure point.

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Номер записи: 57
10-01-2013 дата публикации

Mpls fast re-route using ldp (ldp-frr)

Номер: US20130010589A1
Автор: Sriganesh Kini, Srikanth Narayanan
Принадлежит: Individual

MPLS (Multiprotocol Label Switching) fast re-routing using LDP (Label Distribution Protocol) is described. A first network element in an MPLS network receives a first label advertised from a second network element in the MPLS network. The first network element computes a shortest path tree (SPT) to reach a destination network element under a potential failure condition. The second network element is a nexthop of the first network element in the computed SPT and is not upstream from the potential failure condition in the computed SPT. The first network element determines that a third network element in the MPLS network is a Point of Local Repair (PLR) when the potential failure condition is realized. The first network element distributes a second label to the third network element for a backup LDP Label Switched Path (LSP) that will serve as a backup path when the potential failure condition is realized. The first network element installs a swap action from the second label to the first label. In one embodiment, the backup LDP LSP is an existing shortest path LSP from the third network element to the first network element.

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Номер записи: 58
10-01-2013 дата публикации

Network routing adaptation based on failure prediction

Номер: US20130010610A1
Автор: Detlef Nauck, Vidhyalakshmi Karthikeyan
Принадлежит: British Telecommunications plc

Embodiments of the invention provide a system that predicts network events and triggers a pre-emptive response. An example implementation predicts network link failures and creates a change in the network before the failure actually happens by instigating policy-based adjustment of routing parameters. In particular, an embodiment of the invention operates in two phases. In the first phase the historical operation of a network is observed (B. 4.2 ), to determine observed relationships between link or cluster failures that have occurred, and subsequent failures of different links or clusters. From these observed relationships failure rules can be derived (B. 4.4 ) that are then applied to control routing in the network during a second, control, phase. That is, in the second, control, phase, the derived failure rules are applied such that if a link or cluster failure occurs, then from the rules a prior knowledge of what additional links may fail in the next a time period is obtained, and remedial action can then be taken such as routing data traffic away from the links that are predicted to fail (B. 4.6 ).

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Номер записи: 59
10-01-2013 дата публикации

Managing host routes for local computer networks with a plurality of field area routers

Номер: US20130013809A1
Автор: Jean-Philippe Vasseur, Jonathan W. Hui, Shmuel Shaffer, Stefano Previdi
Принадлежит: Cisco Technology Inc

In one embodiment, a particular field area router (FAR), in a local computer network (e.g., a mesh network) having a plurality of FARs, advertises a common subnet prefix assigned to the local computer network into a global computer network. Each of the plurality of FARs of the local computer network is configured to accept any traffic destined to the local computer network, and a tunnel overlay is built among the plurality of FARs. Upon receiving a packet at the particular FAR destined to a particular device in the local computer network, and in response to the particular FAR not having a host route to the particular device, it forwards the packet on the tunnel overlay to another of the plurality of FARs of the local computer network.

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Номер записи: 60
17-01-2013 дата публикации

Fibre channel switching system

Номер: US20130016734A1
Автор: Stuart B. Berman
Принадлежит: Emulex Design and Manufacturing Corp

The Fibre Channel standard was created by the American National Standard for Information Systems (ANSI) X3T11 task group to define a serial I/O channel for interconnecting a number of heterogeneous peripheral devices to computer systems as well as interconnecting the computer systems themselves through optical fiber and copper media at gigabit speeds (i.e., one billion bits per second). Multiple protocols such as SCSI (Small Computer Serial Interface), IP (Internet Protocol), HIPPI, ATM (Asynchronous Transfer Mode) among others can concurrently utilize the same media when mapped over Fibre Channel. A Fibre Channel Fabric is an entity which transmits Fibre Channel frames between connected Node Ports. The Fibre Channel fabric routes the frames based on the destination address as well as other information embedded in the Fibre Channel frame header. Node Ports are attached to the Fibre Channel Fabric through links.

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Номер записи: 61
31-01-2013 дата публикации

Method and apparatus for resilient routing of control traffic in a split-architecture system

Номер: US20130028070A1
Автор: Neda Beheshti-Zavareh, Ying Zhang
Принадлежит: Individual

The invention is a routing algorithm characteristic that minimizes the weight, meaning that the probability that a node is disconnected from the controller in case of a failure in the network is minimized. The first algorithm used in the invention is an approximation algorithm for finding the controller routing tree that provides maximum resilience in the network. The algorithm is referred to herein as the Maximum Resilience (MR) algorithm. The heuristic MR algorithm selects a shortest-path tree as a starting point and modifies the tree in order to improve resilience. The output of the MR algorithm is not necessarily a shortest-path tree, but provides more resilience compared to the initial tree. The RASP algorithm provides a shortest-path tree with improved network resilience compared to other possible shortest-path trees.

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Номер записи: 62
31-01-2013 дата публикации

Controller Placement for Fast Failover in the Split Architecture

Номер: US20130028073A1
Автор: Mallik Tatipamula, Neda Beheshti-Zavareh, Ying Zhang
Принадлежит: Telefonaktiebolaget LM Ericsson AB

A method implemented by a network topology design system, the network topology design system including a processing device. The method to determine placement of a controller within a network with a split architecture where control plane components of the split architecture network are executed by a controller and the control plane components are separate from data plane components of the split architecture network. The placement of the controller is selected to minimize disruption of the split architecture network caused by a link failure, a switch failure or a connectivity loss between the controller and the data plane components

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Номер записи: 63
31-01-2013 дата публикации

Bootstrapping fault detection sessions over a p2mp tunnel

Номер: US20130028099A1
Автор: Girish Birajdar, Jayant Kotalwar
Принадлежит: Individual

A method for detecting faults associated with a tunnel delivering multicast traffic from a source provider edge router (PE) to each of a plurality of destination PEs, the method using a routing protocol such as BGP to communicate route information to destination PEs, and a fault detection protocol such as BFD to detect tunnel faults.

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Номер записи: 64
31-01-2013 дата публикации

Vertebral joint implants and delivery tools

Номер: US20130030440A1
Автор: Bruce M. McCormack, Edward Fletcher Eyster, Edward Liou, Jeffrey D. Smith, Jonathan Carver, Joshua Druker, Kurin Tu, Martin Leugers, Peter Lombrozo, Shigeru Tanaka
Принадлежит: Providence Medical Technology Inc

A spinal joint distraction system for treating a facet joint including articular surfaces having a contour is disclosed and may include a delivery device including a generally tubular structure adapted to engage a facet joint, an implant adapted to be delivered through the delivery device and into the facet joint, the implant comprising two members arranged in opposed position, and an implant distractor comprising a generally elongate member adapted to advance between the two members of the implant causing separation of the members and distraction of the facet joint, wherein the implant is adapted to conform to the shape of the implant distractor and/or the articular surfaces of the facet upon being delivered to the facet joint. Several embodiments of a system, several embodiments of an implant, and several methods are disclosed including a method for interbody fusion.

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Номер записи: 65
07-02-2013 дата публикации

Uplink transmission method and apparatus in wireless communication system

Номер: US20130034062A1
Автор: Dong Youn Seo, Joon Kui Ahn, Min Gyu Kim, Suck Chel Yang
Принадлежит: LG ELECTRONICS INC

The present invention provides an uplink transmission method and apparatus in a wireless communication system. A terminal receives an uplink resource allocation from a base station; and transmits uplink transmission blocks to a PUSCH (physical uplink shared channel) by using the uplink resource allocation. The uplink resource allocation indicates an allocated RBs (resource blocks) within a subframe that includes a plurality of RBs. The subframe is divided into at least one PUCCH (physical uplink control channel) area for PUCCHs and a plurality of PUSCH (physical uplink shared channel) area for PUSCHs, wherein the PUCCH area is arranged between the plurality of PUSCH regions.

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Номер записи: 66
28-02-2013 дата публикации

Implementing redundancy on infiniband (ib) networks

Номер: US20130051222A1
Автор: Constantine GAVRILOV, Leah Shalev, Zorik Machulsky
Принадлежит: International Business Machines Corp

Methods, systems, and physical computer-readable storage medium are provided to improve efficiency of systems operating on internet protocol (IP) over Infiniband (IB) networks. In an embodiment, by way of example only, a method is provided for implementing redundancy for IB networks. The method includes detecting a failure at a first source port of a source node having a plurality of source ports, selecting a new source port, sending an address resolution protocol (ARP) message to one or more other nodes in communication with the source node including an IP address of the source node and IB address of the new source port of the source node, and re-balancing host traffic.

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Номер записи: 67
14-03-2013 дата публикации

Virtual chassis system control protocols

Номер: US20130064102A1
Автор: Amy Chung-Hua Chang, Anand Vinayagam, Ignatius D. SANTOSO, Nalinakshan Kunnath, Roberto H. Jacob Da Silva
Принадлежит: Alcatel Lucent USA Inc

A virtual chassis system includes a plurality of network nodes configured with a master virtual chassis address. The network nodes are connected by virtual fabric link (VFLs) that provide a connection for exchange of data packets between the network nodes. The data packets include source MAC addresses and associated hardware device information, such as source chassis ID, source network interface identifier and source port identifier information. The network nodes use this information to maintain synchronized MAC address tables for forwarding of data packets in the virtual chassis system. One or more control protocols in the network node are used for topology discovery, master network node election, generation of routing tables, health monitoring and other functions.

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Номер записи: 68
21-03-2013 дата публикации

Wireless communication network system

Номер: US20130070654A1
Автор: Tomotsune Nishimura
Принадлежит: NEC Corp

In a wireless communication network system and on a route of a network which is being used for communication, in case a fall of transmission rate occurs depending on AMR, there is an inconvenience that, even though there exists another route with faster transmission rate, switching to it cannot be made. The route selection method of the present invention is a route selection method in a communication network using a microwave communication system, and depending on the changes in transmission capacity of each route of the network, a route with larger transmission capacity is selected as the route to communicate.

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Номер записи: 69
28-03-2013 дата публикации

Communication device and path establishing method

Номер: US20130077478A1
Автор: Masahiko Matsuura
Принадлежит: Fujitsu Ltd

A communication device configured to establish a path for data transmission including a setting circuit configured to receive a request for setting a path, and in the case that the path includes a section where power supply has been turned off so as to suppress data transmission, to set a detour path for bypassing the section using detour routing information corresponding to the section; and a power supply driving circuit configured to turn on power supply as to the section; wherein the setting circuit switches, in the case that data transmission using the section is enabled according to turning on of the power supply, the detour path to a path including the section.

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Номер записи: 70
28-03-2013 дата публикации

MANAGEMENT OF NETWORK CAPACITY TO MITIGATE DEGRADATION OF NETWORK SERVICES DURING MAINTENANCE

Номер: US20130077480A1
Автор: Beattie, George Sanjini, Griesmer Stephen J., JR. James Gordon
Принадлежит: AT&T Intellectual Property I, L.P.

A method, system and machine-readable storage device to manage network capacity are provided. In accordance with the method, simulation data is received periodically according to a metric based on data associated with a plurality of communication links interconnecting endpoints. Specially, the simulation data is received according to a periodicity adjusted selectively based on an interval of time between a current date and time and a date and time that a communication link is to be taken offline. The simulation data indicates impact of the communication link to be taken offline on a plurality of alternate communication links. Thereafter, load is moved selectively from the communication link to be taken offline to an alternate communication link of the plurality of alternate communication links based on whether the simulation data associated with the alternate communication link satisfies a predetermined criterion. 1. A method of adaptively managing network capacity , the method comprising:receiving periodically simulation data according to a metric based on data associated with a plurality of communication links interconnecting endpoints, the simulation data being received according to a periodicity adjusted selectively based on an interval of time between a current date and time and a date and time that a communication link is to be taken offline, the simulation data indicating impact of the communication link to be taken offline on a plurality of alternate communication links; andmoving selectively load from the communication link to be taken offline to an alternate communication link of the plurality of alternate communication links based on whether the simulation data associated with the alternate communication link satisfies a predetermined criterion.2. The method according to claim 1 , wherein the method further comprises receiving an indication of the communication link to be taken offline from a user.3. The method according to claim 2 , wherein the method ...

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Номер записи: 71
28-03-2013 дата публикации

Network system and network redundancy method

Номер: US20130077481A1
Автор: Masanori Takashima, Minaxay Philavong, Tetsu Izawa, Youichi Hidaka
Принадлежит: NEC Corp

In a network system in which a switch forwarding packets and a control server determining route information are separated, it is desired to achieve a redundancy of the control channel by an out-of-band control channel and an in-band control channel, when the switch receives a control message regarding the flow entry registration and the like based on the route information from the control server. Specifically, the separated switch and control server are connected by a control channel for sending and receiving the control message. The switch is not only connected to a control server via an out-of-band control channel by a route dedicated to the control message, but also connected to another control server via an in-band control channel by a route which is common with a normal data communication for determining the route information, to achieve a redundancy of the control channel.

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Номер записи: 72
04-04-2013 дата публикации

Link Aggregation Based on Port and Protocol Combination

Номер: US20130083797A9
Автор: Janardhanan P. Narasimhan
Принадлежит: Force10 Networks Inc

A network switch suitable for receiving packets of information from and the packets of information to a communications network includes a plurality of physical ports, packet processing functionality and memory. The packet processing functionality operates on information stored in memory to determine the LAG, from among two or more LAGs, over which a packet received by the switch should be correctly forwarded. The switch memory stores a plurality of LAG tables, each one of which can include one or more entries comprising a physical port number and a packet parameter that are used by the packet processing functionality to determinately identify the correct LAG over which to forward a packet.

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Номер записи: 73
18-04-2013 дата публикации

Semi-Centralized Routing

Номер: US20130094350A1
Автор: Amit Gupta, James M. WANDERER, Joon ONG, Leon Poutievski, Min Zhu, Rajiv Ramanathan, Subbaiah VENKATA, Subhasree Mandal
Принадлежит: Google LLC

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for semi-centralized routing. In one aspect, a computer-implemented method receives a network protocol packet at a router adapted for routing data packets to one or more additional routers. The network protocol packet conforms to a routing protocol that provides distributed routing computation. The method also sends the network protocol packet, through a controller, to a selected one of a plurality of route control servers. The method also processes the network control packet at the selected route control server to generate a routing computation result that conforms to the routing protocol. The method also generates routing information based on the routing computation. The routing information conforms to a control protocol that provides centralized routing computation. The method also sends the routing information to the router for routing of data packets based on the control protocol.

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Номер записи: 74
18-04-2013 дата публикации

METHODS AND SYSTEMS FOR AUTOMATICALLY TRACKING THE REROUTING OF LOGICAL CIRCUIT DATA IN A DATA NETWORK

Номер: US20130094354A1
Автор: Hollingsworth John, Massengill David, Taylor William
Принадлежит: AT&T Intellectual Property I, L.P.

An example method involves rerouting data from a logical circuit to a logical failover circuit when the logical circuit fails based on an exceeded quality of service parameter. The logical failover circuit is selected based on a committed bit rate, a variable bit rate, or an unspecified bit rate. The example method also involves rerouting data from a first set of switches to a second set of switches in the absence of a failure associated with the logical circuit. The logical circuit comprises variable communication paths, and the second set of switches are to form a route associated with the variable communication paths that is not predefined and that is dynamically defined at a time of automatic rerouting while maintaining the logical circuit through the second set of switches. 1. A method of rerouting data , the method comprising:rerouting data from a logical circuit to a logical failover circuit when the logical circuit fails based on an exceeded quality of service parameter, the logical failover circuit selected based on a committed bit rate, a variable bit rate, or an unspecified bit rate; andrerouting data from a first set of switches to a second set of switches in the absence of a failure associated with the logical circuit, the logical circuit comprising variable communication paths, and the second set of switches to form a route associated with the variable communication paths that is not predefined and that is dynamically defined at a time of automatic rerouting while maintaining the logical circuit through the second set of switches.2. A method as defined in claim 1 , further comprising updating reroute information in a data structure without manual intervention after the quality of service parameter is exceeded.3. A method as defined in claim 2 , further comprising storing in the data structure second information indicating a duration for which the data was rerouted to the logical failover circuit.4. A method as defined in claim 2 , wherein updating the ...

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Номер записи: 75
18-04-2013 дата публикации

METHOD FOR FAST-RE-ROUTING (FRR) IN COMMUNICATION NETWORKS

Номер: US20130094355A1
Автор: NAKASH Shell
Принадлежит: ECI TELECOM LTD.

A method is described to enable carrying out a fast reroute protection technique which provides both link and node protection without traffic duplication, without the need to distinguish between link and node failures, and without replicating traffic. The technique covers concurrent Working and backup logical path failures, and in particular LSP logical paths. The method is adapted to provide a “Dual Failure Protection” (DFP), and is expandable to various multi-failure scenarios. 1. A method for fast rerouting (FRR) of traffic in a communication network , from a Working path comprising a first node being a point of local repair (PLR) , a link connecting the first node with a second , downstream node being a next hop node (NH) , and a third node positioned downstream to said second node along said Working path being a next-next hop node (NNH); the method comprises:pre-provisioning a point-to-multipoint (P2MP) backup path having a start point at the PLR and two termination points being the NH and the NNH,pre-provisioning, in said P2MP backup path, a node PH being a penultimate hop to the NH, so that the PH is directly connected to the NH;wherein the P2MP backup path comprising two sub-paths, a first extending between the PLR and the NH, and a second between the PLR and the NNH, and wherein the two sub-paths are identical until they branch off at the penultimate hop (PH);concurrently providing link protection against failure of said link between the PLR and NH, and node protection against failure of said NH, thereby ensuring concurrent FRR for said link and said NH by implementing at said PH node a forwarding rule enabling to forward traffic, if received at the PH along said P2MP backup path, towards said NH in case the NH is UP, and downstream the P2MP backup path towards said NNH in case said the NH is DOWN.2. The method according to claim 1 , for use in an MPLS network and wherein traffic is rerouted from the Working path being a label switched path (LSP) which ...

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Номер записи: 76
18-04-2013 дата публикации

Medium access control address protection method and switch

Номер: US20130094510A1
Автор: Zhaoyuan Tan
Принадлежит: Huawei Technologies Co Ltd

The present disclosure discloses a MAC address protection method and switch. A switch in a layer 2 ring network obtains network topology information of the layer 2 ring network, the network topology information includes a protection MAC address of a protected device, an identifier of a switch corresponding to the protection MAC address, and an identifier of each switch in the layer 2 ring network, wherein the protection MAC address is the MAC address of the protected device; and determines a local outgoing interface of the protection MAC address of the protected device according to the network topology information, establishes and stores an outgoing interface of an MAC entry corresponding to the protection MAC address according to the local outgoing interface of the protection MAC address, thereby ensuring the protected device to correctly send and receive messages to meet the topology change of the layer 2 ring network.

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Номер записи: 77
25-04-2013 дата публикации

Method, Apparatus, and System for Switching Communication Path

Номер: US20130100800A1
Автор: Jiang Ming
Принадлежит: Huawei Technologies Co., Ltd.

Embodiments of the present invention provide a method, an apparatus, and a system for switching a communication path. The method for switching a communication path includes: receiving, by an access network device, a data packet for implementing a communication service between a terminal and a first media source; learning, by the access network device, according to the data packet, that a local exchange path between the terminal and the first media source is unavailable; and transferring, by the access network device, the data packet via a detour path, where the data packet is also used by a channel control device on the detour path to control the terminal to disconnect from the detour path and establish a local exchange path between the terminal and a second media source, and where the second media source is in coverage of an access network device currently providing a service for the terminal. 1. A method for switching a communication path comprising:receiving, by an access network device, a data packet for implementing a communication service between a terminal and a first media source;learning, by the access network device, according to the data packet, that a local exchange path between the terminal and the first media source is unavailable; andtransferring, by the access network device, the data packet via a detour path,wherein the data packet is used by a channel control device on the detour path to control the terminal to disconnect from the detour path and establish a local exchange path between the terminal and a second media source, andwherein the second media source is in coverage of an access network device currently providing a service for the terminal.2. The method according to claim 1 , wherein the data packet for implementing the communication service between the terminal and the first media source comprises a data packet uploaded by the terminal to the first media source or delivered by the first media source to the terminal.3. The method according ...

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Номер записи: 78
25-04-2013 дата публикации

PROVIDER BACKBONE BRIDGING - PROVIDER BACKBONE TRANSPORT INTERNETWORKING

Номер: US20130100801A1
Автор: Allan David, Bragg Nigel, FRISKNEY ROBERT, Holness Marc, PARRY SIMON
Принадлежит: ROCKSTAR CONSORTIUM US LP

An Ethernet virtual switched sub-network (VSS) is implemented as a virtual hub and spoke architecture overlaid on hub and spoke connectivity built of a combination of Provider Backbone Transport (spokes) and a provider backbone bridged sub-network (hub). Multiple VSS instances are multiplexed over top of the PBT/PBB infrastructure. A loop free resilient Ethernet carrier network is provided by interconnecting Provider Edge nodes through access sub-networks to Provider Tandems to form Provider Backbone Transports spokes with a distributed switch architecture of the Provider Backbone Bridged hub sub-network. Provider Backbone transport protection groups may be formed from the Provider Edge to diversely homed Provider Tandems by defining working and protection trunks through the access sub-network. The Provider Backbone Transport trunks are Media Access Control (MAC) addressable by the associated Provider Edge address or by a unique address associated with the protection group in the Provider Backbone Bridged network domain. 140-. (canceled)41. A method of forwarding packets at a hub of a hub and spoke packet network , the method comprising:configuring at least two connections between the hub and an edge node;configuring the at least two connections as a protection group such that one of the connections of the protection group is configured as a primary connection to carry packets between the hub and the edge node when the primary connection is operational and at least one other of the connections of the protection group is configured as a standby connection to carry packets between the hub and the edge node when the primary connection is not operational;associating a protection group address with the protection group;learning forwarding information at the hub based on source addresses of packets received at the hub, packets received from the edge node on the primary connection of the protection group having the protection group address as a source address; andat the ...

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Номер записи: 79
25-04-2013 дата публикации

Managing Utilization Of A Logical Communication Path In A Multi-Path Channel

Номер: US20130100808A1
Автор: Eli Malul, Eran MANN, Tal Doron
Принадлежит: Kaminario Tech Ltd

A method of managing utilization of a logical communication path in a multi-path channel consisting of a plurality of logical communication paths overlying a plurality of physical connections connecting a first and a second node, including: for a non-ordered communication stream implementing a load-balancing communication mode to distributedly communicate messages of the non-ordered communication stream over the plurality of logical paths; and for an ordered communication stream implementing a designated logical path mode including designating a logical path of the multiple-path channel for communicating thereover messages of the ordered communication stream.

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Номер записи: 80
25-04-2013 дата публикации

ROUTING NETWORK TRAFFIC

Номер: US20130103854A1
Автор: Garrett Owen John, McDowall Ian Douglas
Принадлежит: Riverbed Technology, Inc.

A traffic manager (-) for, and a method of, routing network traffic to a plurality of server computers (-). The traffic manager includes a network interface () and a processor (). The processor is configured to receive network traffic comprising a request () from a client computer (-) via the network interface. The processor is configured to then identify, based on attributes of the request, a server computer that is responsible for servicing the request (a responsible server). The processor is configured to then route the request to the responsible server using the network interface. 1. A traffic manager for routing network traffic to a plurality of server computers , wherein said traffic manager includes a network interface , and a processor configured to:receive network traffic comprising a request from a client computer via said network interface;identify, based on attributes of said request, a server computer that is responsible for servicing said request (a responsible server), androute said request to said responsible server using said network interface.2. A traffic manage according to claim 1 , wherein said processor is further configured to identify a server computer that is responsible for servicing said request by creating a hash of attributes of said request and determining a server computer responsible for servicing requests having that hash.3. A traffic manager according to claim 2 , wherein said processor is configured to claim 2 , for any value of said hash claim 2 , establish which server computer is responsible for servicing requests having that hash by:creating a first list of said server computers, said first list being ordered and numbered;calculating a first variable by taking the modulus of the hash with respect to the number of server computers in said first list;identifying, as an identified server, the server computer at the position in the first list indicated by said first variable;establishing said identified server as responsible for ...

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Номер записи: 81
02-05-2013 дата публикации

Multi-metric routing calculations

Номер: US20130107726A1
Автор: Chau T. Trinh, Timothy J. Hughes, Wendell Y. Kishaba
Принадлежит: Powerwave Cognition Inc

In a Mobile Ad Hoc Network (MANET), multi-metric information is gathered and applied to a cost-based route calculation. In particular, each node gathers resource metrics from neighboring of nodes, along with data rate and reliability information for data links to and from the node. This information is applied to a costing algorithm such as Dykstra' Open Shortest Path First algorithm to obtain routes through the network. This approach may be adapted with suitable modifications to use with unicast traffic or with a multicast forwarding group.

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Номер записи: 82
09-05-2013 дата публикации

DEVICE AND METHOD FOR EGRESS PACKET FORWARDING USING MESH TAGGING

Номер: US20130114619A1
Автор: Wakumoto Shaun K
Принадлежит:

A method for packet forwarding using a tag in a mesh network is described herein. A packet is received on a non-mesh port of a first mesh network device of the mesh network. One or more available paths between the first mesh network device and a second mesh network device are determined. A path of the one or more available paths is selected based on an egress forwarding rule associated with the path. A tag associated with the selected path is inserted into the packet. The packet is forwarded along the selected path. 1. A method for packet forwarding using a tag in a mesh network , the method comprising:receiving a packet on a non-mesh port of a first mesh network device of the mesh network;determining one or more available paths between the first mesh network device and a second mesh network device;selecting a path of the one or more available paths based on an egress forwarding rule associated with the path;inserting a tag associated with the selected path into the packet; andforwarding the packet along the selected path.2. The method of claim 1 , wherein the egress forwarding rule specifies limitations on forwarding packets on egress through mesh network devices of the mesh network.3. The method of claim 1 , wherein selecting the path comprises comparing an ingress component of the egress forwarding rule to a property of the packet.4. The method of claim 1 , further comprising:receiving the packet on a mesh port of a mesh network device of the mesh network; anddetermining whether the packet is a unicast packet.5. The method of claim 4 , wherein the packet is a unicast packet claim 4 , her comprising:determining that the path of the packet within the mesh network terminates at the receiving mesh network device;removing the tag from the packet; andforwarding the packet out of one or more non-mesh ports corresponding to the tag.6. The method of claim 4 , wherein the packet is a unicast packet claim 4 , further comprising:determining that the path of the packet within ...

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Номер записи: 83
16-05-2013 дата публикации

SYSTEM AND METHOD TO ACHIEVE SUB-SECOND ROUTING PERFORMANCE

Номер: US20130121138A1
Автор: Chen Holly, Soon Shih-Chung Tom, Tan Teong Yee, Zhao Yongdong, Zhou Bei
Принадлежит:

A system and method for routing data, the system having a processor, an interface in communication with the processor and capable of being in communication with a second system for routing data, a memory unit in communication with the processor, the memory unit having a network routing table having a plurality of routes, the plurality of routes having a first route; and a network failure route selection logic including instructions adapted to configure the processor to determine when the first route is inoperative, transmit a first data packet to the second system for routing data when the first route is inoperative and utilize a second route selected from one of the plurality of routes, the second route being different from the first route. 1. A method for a first router , the method comprising:determining, using a processor, whether a sequence number included in a first reroute request received from a second router is newer than a stored sequence number associated with the second router, the first reroute request including network failure information identifying a cause of a failure of a first route, the sequence number being incremented for each new reroute request sent from the second router; andselecting, using the processor, a second route from a plurality of routes to carry data in place of the first route if the sequence number included in the first reroute request is determined to be newer than the stored sequence number but not if the sequence number included in the first reroute request is determined to be older than the stored sequence number, the plurality of routes being stored in a routing table, the second route being different from the first route.2. The method as defined in wherein the first reroute request comprises information related to a condition of the first route.3. The method as defined in further comprising determining a cause of a failure of a third route by detecting a loss of a signal along the third route.4. The method as defined in ...

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Номер записи: 84
16-05-2013 дата публикации

Method of shared mesh protection switching

Номер: US20130121140A1
Автор: Jeong-Dong Ryoo, Taesik CHEUNG
Принадлежит: Electronics and Telecommunications Research Institute ETRI

A method of performing shared mesh protection switching in a sharing node is provided. The method includes: receiving a request message from a first terminal node, having detected a signal failure of a working path; copying the request message and forwarding a request message to an adjacent node on a first protection path of a plurality of protection paths; determining whether a sharing resource is available; transmitting, if a sharing resource is available, an available message to a second terminal node forming a pair with the first terminal node; and receiving a response message from the second terminal node, having received the available message from all sharing nodes on the first protection path.

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Номер записи: 85
16-05-2013 дата публикации

Point to Multi-Point Based Multicast Label Distribution Protocol Local Protection Solution

Номер: US20130121169A1
Автор: Lujun Wan, Qianglin Quintin ZHAO, Tao Zhou, YING Chen
Принадлежит: FutureWei Technologies Inc

In one aspect, the disclosure includes an apparatus comprising a processor configured to function as a merge point (MP) in a point to multi-point (P2MP) backup label switching path (LSP) for a primary LSP, receive P2MP backup LSP information originating from a protected node, wherein the P2MP backup LSP information comprises the identity of a point of local repair (PLR), determine a backup label switching router (LSR), and send a message with the identity of the backup LSR to an upstream node.

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Номер записи: 86
23-05-2013 дата публикации

Method and apparatus for protection switching in point-to-multipoint network

Номер: US20130128720A1
Автор: Daeub Kim, Jeong-Dong Ryoo, Taesik CHEUNG
Принадлежит: Electronics and Telecommunications Research Institute ETRI

A method of performing protection switching in a network including a first node and a plurality of second nodes that are connected to the first node is provided. The first node counts the number of obstacles that have occurred in a plurality of paths that are connected between the plurality of second nodes, and if the counted number is smaller than a predetermined threshold value, the first node performs protection switching per leaf. Alternatively, if the counted number is equal to or larger than a predetermined threshold value, the first node performs protection switching per tree.

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Номер записи: 87
23-05-2013 дата публикации

STREAMING SERVICE LOAD SHARING METHOD, STREAMING SERVICE PROCESSING METHOD, AND CORRESPONDING DEVICE AND SYSTEM

Номер: US20130128722A1
Автор: Teng Xindong
Принадлежит: Huawei Technologies Co., Ltd.

Embodiments of the present invention disclose a streaming service load sharing method, a streaming service processing method, and a corresponding device and system. According to the embodiments of the present invention, a fixed allocation range is determined for each service node, so that when a service node fails and needs to perform smoothing of stream table items, only a fixed allocation range of the failed service node needs to be shared by other service nodes, thereby better ensuring stability of a processing range of the service node, and reducing the number of the stream table items to be smoothed. 1. A streaming service load sharing method , comprising:receiving a service stream;calculating an allocation identifier of the service stream;determining, according to allocation ranges of currently valid service nodes, a service node corresponding to an allocation range to which the allocation identifier of the service stream belongs, wherein the service node belongs to the currently valid nodes and an allocation range of a currently valid service node comprises its own fixed allocation range and a part of fixed allocation ranges of service nodes that are currently in an invalid state, where the part is shared by the currently valid service node; andjudging whether the service node fails; if no, forwarding the service stream to the service node; if yes, forwarding the service stream to a backup service node of the service node, receiving a message that is sent by a management module and indicates that the service node is invalid, and increasing the number of currently invalid service nodes by 1 to adjust the allocation ranges of the currently valid service nodes again.2. The method according to claim 1 , wherein after receiving the message that is sent by the management module and indicates that the service node is invalid claim 1 , the method further comprises:receiving a message that is sent by the management module and indicates that the service node is ...

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Номер записи: 88
30-05-2013 дата публикации

Method and system for managing high capacity traffic offload in an ip network nucleus in the transport layer

Номер: US20130135992A1
Автор: Francisco Javier JIMÉNEZ CHICO, María Angeles CALLEJO RODRIGUEZ
Принадлежит: Telefonica SA

The invention relates to a method and system for coordinating and automating the processes of IP traffic offload in transport technology, minimizing the operational problems associated with the configuration of IP and transport layers. The system consists of two main components, a transit traffic management module integrated into a network operator and a routing module for generating new links integrated into each of the IP network nodes.

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Номер записи: 89
06-06-2013 дата публикации

Fast Repair of a Bundled Link Interface Using Packet Replication

Номер: US20130142036A1
Автор: Shamit Dipak Kapadia, Zhifang Zeng
Принадлежит: Cisco Technology Inc

In one embodiment, a packet switching device sends packets to be sent from a single link of a bundled link interface to multiple egress network processing units (on a same or different line cards). A single one of these multiple egress network processing units is configured to be in the active mode sending particular sets of packets. The other egress network processing units are configured for these particular sets of packets to be in the non-active mode, and hence, will correspondingly drop these particular sets of packets. In case of failure, an egress network processing unit can quickly (e.g., changing a flag) be changed to the active mode to quickly reduce or eliminate loss of packets.

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Номер записи: 90
06-06-2013 дата публикации

Proximity Detection for Media Proxies

Номер: US20130145042A1
Автор: Aoun Cedric, March Sean, Sen Sanjoy
Принадлежит: Apple Inc.

A method of detecting proximity between a media proxy and a client uses a proximity probe to query a plurality of media proxies, forcing the media proxies to respond to a proximity server. The proximity server uses an algorithm to determine which media proxy is closest to the client based on the responses. In an alternate embodiment, the same sorts of proximity probes may be used to determine if two media endpoints have a direct connection such that they may bypass a media proxy. 1. A method of assigning a media proxy to a client based on proximity of the media proxy , comprising:a first server receiving a request from the client for a media session;the first server transmitting a list of media proxies to the client, wherein the client is configured to transmit a request to each of one or more media proxies in the list of media proxies; times of receipt of responses received from the one of the one or more media proxies, wherein each response is in response to the respective request from the client; and', 'round trip times to and from the one or more media proxies., 'the first server assigning a first media proxy of the list of media proxies based on determined proximity between the client and each of the one or more media proxies, wherein the determined proximity between the client and each of the one or more media proxies is based on2. The method of claim 1 , wherein the proximity between the client and each of the one or more media proxies is determined by a proximity server claim 1 , wherein the times of receipt of the responses are detected by the proximity server receiving the responses claim 1 , and wherein the round trip times to and from the one or more media proxies is relative to the proximity server.3. The method of claim 1 , wherein the first server comprises an application server.4. The method of claim 1 , wherein the request from the client comprises a session initiation protocol (SIP) request.5. An application server for assigning a media proxy to a ...

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Номер записи: 91
13-06-2013 дата публикации

METHOD AND SYSTEM FOR EXTENDING ROUTING DOMAIN TO NON-ROUTING END STATIONS

Номер: US20130148491A1
Автор: Halabi Mitri, Jha Pankaj K.
Принадлежит: BROCADE COMMUNICATIONS SYSTEMS, INC.

A system is provided for facilitating assignment of a virtual routing node identifier to a non-routing node. During operation, the system assigns to a non-routing node coupled to a switch a virtual routing node identifier unique to the non-routing node. In addition, the system communicates reachability information corresponding to the virtual routing node identifier to other switches in the network. 1. A switch , comprising:a processor; generating a virtual routing node identifier for a non-routing node, wherein the virtual routing node identifier indicates a multi-switch link aggregation; and', 'precluding a received multi-destination frame from being forwarded to the non-routing node when an ingress-node field of the multi-destination frame matches the virtual routing node identifier, thereby, 'a storage device coupled to the processor and storing instructions which when executed by the processor cause the processor to perform a method, the method comprisingavoiding duplication of the multi-destination frame.2. The switch of claim 1 , wherein the switch is a capable of routing layer-2 data frames without requiring the network topology to be a spanning tree topology.3. The switch of claim 1 , wherein the virtual routing node identifier is a routing bridge identifier in accordance with a Transparent Interconnection of Lots of Links (TRILL) protocol.4. The switch of claim 1 , wherein the method further comprises constructing a frame containing reachability information corresponding to the virtual routing node identifier.5. The switch of claim 1 , wherein the method further comprises marking an ingress-node field of a frame received from the non-routing node with the virtual routing node identifier.6. The switch of claim 1 , wherein the method further comprises communicating to a second switch which is part of the multi-switch link aggregation a MAC address learned from a port to which the none-routing node is coupled.7. The switch of claim 1 , wherein in response to ...

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Номер записи: 92
13-06-2013 дата публикации

A METHOD OF ROUTING AND A DEVICE FOR AN AUTONOMOUS SYSTEM

Номер: US20130148495A1
Автор: Lin Changwang, Zhang Haifeng
Принадлежит: HANGZHOU H3C TECHNOLOGIES CO., LTD

The disclosure relates to a method of routing for an Autonomous System AS in a communication system, in which the AS comprises a plurality of network devices including a first network device and a second network device. The first network device distributes routing information to a forwarding table by calculating a first route from the first network device to the second network device. The first network device receives information of a destination network device of the communication system from the second network device, and forms a second route from the second network device to the destination network device to be stored in the forwarding table using the received information of the destination network device. When the first route fails, the first network device calculates a third route from the first network device to the second network device and updates the routing information in the forwarding table according to the third route. 1. A method of routing for an Autonomous System (AS) in a communication system , the AS comprising a plurality of network devices including a first network device and a second network device , the method comprising:the first network device:distributing routing information to a forwarding table by calculating a first route from the first network device to the second network device;receiving information of a destination network device of the communication system from the second network device, and forming a second route from the second network device to the destination network device to be stored in the forwarding table using the received information of the destination network device; andwhen the first route fails, calculating a third route from the first network device to the second network device and updating the routing information in the forwarding table according to the third route.2. The method according to claim 1 , wherein the AS is an Open Shortest Path First OSPF network and the second network device is a border network device.3. ...

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Номер записи: 93
13-06-2013 дата публикации

Method and System for Survival of Data Plane Through a Total Control Plane Failure

Номер: US20130151445A1
Автор: James Uttaro
Принадлежит: AT&T INTELLECTUAL PROPERTY I LP

A system and method for retaining routes in a control plane learned by an inter-domain routing protocol in the event of a connectivity failure between routers. Routers are classified as either route reflectors or originators. A determination is made whether the connectivity failure occurred between a route reflector and an originator, two originators, or two route reflectors. A determination is then made whether to propagate a withdrawal of learned routes based on whether the connectivity failure occurred between a route reflector and an originator, two originators, or two route reflectors. A withdrawal of learned routes is propagated to neighboring routers if the connectivity failure occurred between two originators, or between a route reflector and an originator that is inaccessible via an intra-domain routing protocol. No withdrawal of learned routes is propagated if the connectivity failure occurred between two route reflectors, or between a route reflector and an originator that is accessible via an intra-domain routing protocol.

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Номер записи: 94
20-06-2013 дата публикации

Method and System for an Optimized Retransmission of a Message in a Satellite Communications Context

Номер: US20130155836A1
Автор: Gineste Mathieu
Принадлежит: THALES

A communications method for retransmission of at least one fragment of a lost or erroneous message from a terminal to a gateway over a communications network comprising a plurality of terminals, communicating over a demand assignment multiple access and comprising a control centre allocating the communications resource to the terminals, comprises: detection, by the gateway, of fragments of lost or erroneous messages and, when at least one fragment is detected, notification via the gateway to the control centre of the loss of at least one fragment; calculation, by the control centre, of a second allocation plan taking into account a new transmission of the fragment; notification by the gateway to the terminal of the loss of the fragment and notification by the control centre to the terminal of the second allocation plan; transmission by the terminal of the lost fragment according to the second allocation plan to the gateway. 1. A communications method for the retransmission of at least one fragment of lost or erroneous message from a terminal to a gateway on a communications network comprising a plurality of terminals , communicating by means of a communications resource over a demand assignment multiple access , said communications network further comprising a control centre allocating the communications resource to the terminals , said method comprising:transmission of a first allocation plan for the communications resources from the control centre to the terminal and to the gateway,transmission of the message from the terminal to the gateway according to the first allocation plan,detection, by the gateway, of fragments of lost or erroneous messages and, when at least one fragment of lost or erroneous message is detected, the notification via the gateway to the control centre of the loss of at least one fragment of the message,calculation, by the control centre, of a second allocation plan taking into account a new transmission of the fragment of lost or erroneous ...

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Номер записи: 95
20-06-2013 дата публикации

Bandwidth management for MPLS fast rerouting

Номер: US20130155840A1
Автор: LI GUANGZHI, Wang Dongmei
Принадлежит: AT&T Intellectual Property II, LP

Certain exemplary embodiments provide a method comprising: in a network at a node located on a label switched path: selecting a backup path to respond to a failure; and for each link along the backup path, reserving a backup bandwidth, wherein the backup bandwidth is sufficient to reroute traffic around the failure. 1. A system communicatively linked to a network comprising a plurality of link-coupled nodes at a non-terminal node located on a label switched path of a plurality of label switched paths in the network , the system comprising:a memory that stores instructions;a processor that executes the instructions to perform operations comprising:selecting an optimized backup path for rerouting traffic around a failure located downstream of the non-terminal node, wherein the failure is one of a plurality of possible failures on the plurality of label switched paths;reserving a backup bandwidth for each predetermined link of a plurality of predetermined links along the optimized backup path, wherein the backup bandwidth is determined by a value corresponding to a bandwidth associated with a particular failure of the plurality of possible failures;updating the value of the backup bandwidth; andadjusting a bandwidth associated with the optimized backup path to a previously stored value of a bandwidth associated with a link on the optimized backup path.2. The system of claim 1 , wherein the operations further comprise deleting the optimized backup path from a memory for each respective node.3. The system of claim 2 , wherein the operations further comprise transmitting a deletion signal along the optimized backup path claim 2 , wherein the deletion signal deletes the optimized backup path from the memory for each respective node.4. The system of claim 3 , wherein the operations further comprise receiving a confirmation message indicating that the optimized backup path has been deleted.5. The system of claim 1 , wherein the operations further comprise decreasing the ...

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Номер записи: 96
20-06-2013 дата публикации

Method and system for providing mobile wireless call failover

Номер: US20130155842A1
Автор: Devin C. MOORE, Wade P. Thompson
Принадлежит: Verizon Corporate Services Group Inc

An approach for call failover to a packetized voice session is described. Impending signal failure is detected on a cellular link supporting a cellular call with a user device. A failover procedure is initiated in response to the detection, wherein the failover procedure includes detecting presence of a wireless data connection, and terminating the cellular call and concurrently activating a voice call application to establish a packetized voice session over the wireless data connection with the user device.

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Номер записи: 97
20-06-2013 дата публикации

Autonomic error recovery for a data breakout appliance at the edge of a mobile data network

Номер: US20130155843A1
Автор: Mark D. Schroeder, Michael T. Kalmbach, William F. Berg
Принадлежит: International Business Machines Corp

A mechanism provides autonomic recovery for a breakout appliance at the edge of a mobile data network from a variety of errors using a combination of hardware, software and network recovery actions. The recovery actions proceed upon a sliding scale depending on the severity of the problem to achieve the goals of minimizing disruption to traffic flowing through the NodeB while also maintaining an acceptable cost of ownership/maintenance of the system by automatically recovering from as many problems as possible. The error recovery functions within the breakout system hide the error recovery complexities from the management system upstream in the mobile data network. For critical, non-recoverable errors, the autonomic recovery mechanism works in conjunction with a fail-to-wire module to remove the breakout system in the event of a failure in such a way that the mobile data network functions as if the breakout system is no longer present.

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Номер записи: 98
20-06-2013 дата публикации

PROTECTION SWITCHING METHOD, SYSTEM AND A NODE IN AN LTE NETWORK

Номер: US20130155844A1
Автор: Madaiah Vinod Kumar
Принадлежит: Tejas Networks Limited

The present invention relates to a protection switching method, system and a node in an LTE network. In one embodiment this is accomplished by a plurality of base transceiver station (BTS) linked by the network over which the base transceiver stations communicate, wherein the network includes at least one primary BTS and at least two secondary BTS, and wherein each BTS includes at least two bidirectional antennas, provisioning traffic to at least one secondary BTS as work BTS for backhauling the traffic, wherein the traffic includes user data traffic, control and signaling data traffic from the primary BTS, checking periodically for control signal by all the BTS, wherein the control signals are periodically transmitted and received by all the BTS directly or indirectly via another secondary BTS to check the status of wireless link, transparently and steering, upon failure of the work wireless X2 link between the primary BTS and the secondary BTS, the beam of the primary BTS appropriately to the next available BTS as protect BTS, wherein the steering is based on the computed pre-coder vector value at the primary BTS. 1. A protection switching method in an LTE network , the method comprising:a plurality of base transceiver station (BTS) linked by the network over which the base transceiver stations communicate, wherein the network includes at least one primary BTS and at least two secondary BTS, and wherein each BTS includes at least two bidirectional antennas;provisioning traffic to at least one secondary BTS as work BTS for backhauling the traffic, wherein the traffic includes user data traffic, control and signaling data traffic from the primary BTS;checking periodically for control signal by all the BTS, wherein the control signals are periodically transmitted and received by all the BTS directly or indirectly via another secondary BTS to check the status of wireless link, transparently; andsteering, upon failure of the work wireless X2 link between the primary ...

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Номер записи: 99
20-06-2013 дата публикации

Hybrid codebook design for wireless systems

Номер: US20130156075A1
Автор: Abdulla Firag, Apostolos Papathanassiou, DEBDEEP CHATTERJEE, Hooman Shirani-Mehr, Mansoor Shafi, Peter J. Smith
Принадлежит: Intel Corp

Briefly, in accordance with one or more embodiments, a codebook for wireless transmissions may be generated by dividing a codebook into a fixed set of codewords and an adaptive set of codewords. The adaptive set of codewords may be scaled to cluster together and then rotated to be centered or nearly centered about a target. The adaptive set of codewords may then be merged with the fixed set of codewords to provide a hybrid codebook. A codeword from the hybrid codebook may be selected for precoding a transmission to provide a minimum, or nearly minimum, quantization error.

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Номер записи: 100