Galois field multiplying unit realizing device

The invention discloses a Galois field multiplying unit realizing device which converts the calculation of Galois field multiplication into the multiplication of matrix modules. The Galois field multiplying unit realizing device comprises an L matrix module, a U matrix module, an m-bit data input/output interface, a Q matrix generating module and the like. The structure of the Galois field multiplying unit realizing device relates to a 3m-1 group of binary and gate trees and one group of exclusive or gate trees. The embodiment of the invention provides an example for realizing a Galois field GF (2<128>) multiplying unit on a basis of an FPGA when m=128. The multiplying unit can be used for the hardware realization of a G-hash function and can achieve a calculation speed of over 10Gbps.

Method and device for identifying traffic of access network

The invention discloses a method and a device for identifying the traffic of an access network. The method comprises the following steps of: extracting a sub-stream, which corresponds to each data stream, from each data stream of the access network; sampling all the sub-streams to obtain sampling sub-streams; identifying the application layer protocol of each sampling sub-stream and establishing a mapping relationship between the sampling sub-stream and the application layer protocol according to the identification result; extracting initial data from each sub-stream and establishing sub-stream characteristic vectors which correspond to the sub-streams according to the initial data; clustering the sub-streams according to all the sub-stream characteristic vectors to form a plurality of clusters; establishing a mapping relationship between the clusters and the application layer protocols according to the mapping relationship between the sampling sub-stream and the application layer protocol ...

Network video user experience quality measurement method and device

The invention discloses a network video user experience quality measurement method and device. The method includes the steps of setting multiple application performance measurement indexes for network videos, dividing the application performance measurement indexes into fuzzy levels, setting membership functions for all the fuzzy levels, setting a fuzzy rule table which includes at least one fuzzy rule, measuring the multiple application performance measurement indexes, obtaining measurement values, obtaining the probability that the measurement values belong to the fuzzy levels according to the measurement values and the membership functions, and calculating evaluation values of network video user experience quality according to the probability that the measurement values of the multiple application performance measurement indexes belong to the fuzzy levels and according to the fuzzy rule table. According to the technical scheme, the numerical values reflecting the network video user experience ...

FiWi converged network and communication method based on FiWi converged network

The invention discloses a FiWi converged network and a communication method based on the FiWi converged network. The FiWi converged network comprises one or more FiWi nodes and a controller, wherein the FiWi nodes are respectively connected with an optical line terminal to form a physical network and is connected with the controller. Each FiWi node includes a forwarding module and physical interfaces, wherein the physical interfaces are used for communication, the forwarding module maintains a plurality of virtual interfaces, the virtual interfaces have a mapping relationship with the physical interfaces, and the forwarding module is used for selecting a virtual interface for a data flow entering the FiWi node based on a flow table and forwarding the data flow through the physical interface mapped by the virtual interface. The controller is used for constructing a virtual network view based on a physical network to carry out topology discovery and monitor the flow of the virtual interfaces ...

Method and device for realizing finite domain multiplication based on serial and parallel combination

The invention discloses a method and device for realizing finite domain multiplication based on serial and parallel combination. The method comprises the steps of: dividing m sites of multiplication factors A into p groups from low site to high site by taking k sites as a group, wherein each group obtained after group division is presented as ei, [m/k]=p and i=0, 1, ......, p-1; subjecting e0 and multiplication factors B to multiplication in a finite domain to obtain D0; outputting D'0 as C'1 in a next step; subjecting the multiplication factors B to k-site left shift operation in the finite domain to obtain E<1>; subjecting ej and E to the multiplication in the finite domain to obtain D'j; subjecting D'j and C'j to additive operation in the finite domain to obtain C'j+1; subjecting E to the k-site left shit operation in the finite domain to obtain E, wherein j=1, 2, 3......, p-2; subjecting ep-1 and Ep-1 to the multiplication in the finite domain to obtain D'p-1; subjecting ...

Churning encryption method for high-speed network data

The invention provides a multibyte churning encryption method for high-speed network data. By increasing the digit length of a churning key and expanding the key space, the problems of the present churning algorithm that the byte-by-byte encryption speed is low and the key space is small to be easily decrypted can be solved, and the method can be safely and economically suitable for the data encryption of a high-speed network.

Passive optical network communication method, passive optical network communication system optical network unit and optical line terminal

The invention discloses a passive optical network (PON) communication method, which comprises the following steps: utilizing wavelength division multiplexing technology to generate a plurality of optical carrier groups of which the wavelengths are different from each other, wherein each optical carrier group comprises a plurality of optical carriers of which the wavelengths are the same; adoptingoptical code division multiple access (OCDMA) technology to perform code division on the carriers of each wavelength; changing user signals into a signal sequence with spread-spectrum characteristic through chaotic spread-spectrum processing; distinguishing different users according to an address code of an OCDMA system on each carrier; and recovering an original signal through related decoding and matching operations at a receiving end. The invention also discloses a PON system, an optical line terminal (OLT) and an optical network unit (ONU). By adopting the PON communication method, the PON communication ...

METHOD AND EQUIPMENT FOR LARGE-CAPACITY REGIONAL COMMUNICATION TRANSMITTED WITH OPTICAL FIBRE SYSTEM

Network management method and system supporting elephant flow, interchanger and network

The invention discloses a network management method and system supporting elephant flow, a network switch and a communication network. The network management method supporting the elephant flow comprises the following steps: when the elephant flow is detected in the network, a source address and a target address of the elephant flow are extracted, a plurality of paths between the source address and the target address are acquired, and weight of corresponding paths which support the elephant flow is calculated according to network loads and network topologies of the paths; the network management system generates a forwarding table of the network switch and sends the forwarding table to the network switch, wherein the forwarding table comprises the weight of the corresponding paths which support the elephant flow and an operational order of the network switch, and therefore the network switch can execute the forwarding table and distribute the rate of the elephant flow according to the weight ...

FiWi node and FiWi fusion networking method

The invention discloses a FiWi node and a FiWi fusion networking method. The FiWi node comprises a forwarding module and physical interfaces. The FiWi node utilizes the plurality of physical interfaces to carry out communication. The forwarding module is maintained with a plurality of virtual interfaces, wherein the virtual interfaces and the physical interfaces are in mapping relation. The forwarding module is used for selecting the virtual interface for data flow entering the FiWi node based on a flow table and forwards the data flow through the physical interface mapped with the virtual interface. By utilizing network virtualization, FiWi fusion networking is allowed to be independent of specific access ways, thereby realizing global control of a network.

Method and device for identifying traffic of access network

The invention discloses a method and a device for identifying the traffic of an access network. The method comprises the following steps of: extracting a sub-stream, which corresponds to each data stream, from each data stream of the access network; sampling all the sub-streams to obtain sampling sub-streams; identifying the application layer protocol of each sampling sub-stream and establishing a mapping relationship between the sampling sub-stream and the application layer protocol according to the identification result; extracting initial data from each sub-stream and establishing sub-stream characteristic vectors which correspond to the sub-streams according to the initial data; clustering the sub-streams according to all the sub-stream characteristic vectors to form a plurality of clusters; establishing a mapping relationship between the clusters and the application layer protocols according to the mapping relationship between the sampling sub-stream and the application layer protocol ...

Passive optical network communication method, optical-fiber network unit, and optical line terminal

The invention discloses a passive optical network (PON) communication method. In an up direction, an ONU adopts a broadband light source to perform spectrum division on the broadband light source through a wavelength division multiplexer, and adopts an OFDM signal to modulate the broadband light source so that the ONU realizes high-speed broadband network communication without distinguishing wavelengths or expanding the capacity of a PON system. The invention also discloses the PON system adopting the communication method, an optical network unit (ONU) and an optical line terminal (OLT). By adopting the PON communication method, a PON communication system, the ONU and the OLT, the high-speed broadband network communication is realized without distinguishing the wavelengths of the ONUs; and the ONUs of all users in the system adopt completely the same equipment so that engineering construction and network operation are simple and practicable.

Passive optical network communication method, passive optical network communication system, optical-fiber network, and optical line terminal

The invention discloses a passive optical network (PON) communication method. In an up direction, an ONU adopts a broadband light source to perform spectrum division on the broadband light source through a wavelength division multiplexer, and adopts an OFDM signal to modulate the broadband light source so that the ONU realizes high-speed broadband network communication without distinguishing wavelengths or expanding the capacity of a PON system. The invention also discloses the PON system adopting the communication method, an optical network unit (ONU) and an optical line terminal (OLT). By adopting the PON communication method, a PON communication system, the ONU and the OLT, the high-speed broadband network communication is realized without distinguishing the wavelengths of the ONUs; and the ONUs of all users in the system adopt completely the same equipment so that engineering construction and network operation are simple and practicable.

Authentication method of Ethernet passive optical network (EPON) system

The invention provides an authentication method of an Ethernet passive optical network (EPON) system. By combining Galois field message authentication code (GMAC), the method realizes authentication process of the EPON system, can support ONU authentication and user authentication simultaneously, and designs a frame structure of the GMAC authentication of the EPON system and protocol process of the ONU authentication and the user authentication. The method can overcome the defect of one-way authentication existing in the EPON system authentication mode under the IEEE802.1X port access control mode, and effectively guarantee the source authenticity and data integrity of the authentication. GMAC has provable security, hash function structure thereof based on a binary Galois field multiplier is suitable for parallel and high-speed implementation of hardware and has increment authentication characteristic, thus leading the method to be capable of meeting the requirements of high-speed and effective ...

METHOD AND EQUIPMENT FOR LARGE-CAPACITY REGIONAL COMMUNICATION TRANSMITTED WITH OPTICAL FIBRE SYSTEM

This invention relates to a high-capacity (34 Mb/s) regional communication method with optical fibre system. It includes following steps: 1, trunk channel signal (34368 Kb/s) is divided into four branches (8592 Kb/s). 2, with frame frequency 24 Kz an interval signal frame is generated by sampling the interval signal S2i (i=1,2,3 and 4) (8448 Kb/s) that is ready to interpolate, 3, 6 bits are interpolated into the interval signal frame. 4,the 8592 Kb/s speed interpolated interval signal S2io (i=1,2,3 and 4) is generated. 5, the outputs of four branches and S2io are synchronously multiple-connected.

Churning encryption method for high-speed network data

The invention provides a multibyte churning encryption method for high-speed network data. By increasing the digit length of a churning key and expanding the key space, the problems of the present churning algorithm that the byte-by-byte encryption speed is low and the key space is small to be easily decrypted can be solved, and the method can be safely and economically suitable for the data encryption of a high-speed network.

Galois field multiplying unit realizing device

The invention discloses a Galois field multiplying unit realizing device which converts the calculation of Galois field multiplication into the multiplication of matrix modules. The Galois field multiplying unit realizing device comprises an L matrix module, a U matrix module, an m-bit data input/output interface, a Q matrix generating module and the like. The structure of the Galois field multiplying unit realizing device relates to a 3m-1 group of binary and gate trees and one group of exclusive or gate trees. The embodiment of the invention provides an example for realizing a Galois field GF (2<128>) multiplying unit on a basis of an FPGA when m=128. The multiplying unit can be used for the hardware realization of a G-hash function and can achieve a calculation speed of over 10Gbps.

Data processing method, server and monitoring system for campus users based on WiFi

The invention discloses a data processing method, a server and a monitoring system for campus users based on WiFi. The data processing method comprises the following steps: obtaining original user data records including MAC addresses of network cards, signal strength, time stamps and the geographical location of a WiFi probe through the WiFi probe arranged at a monitoring region; preprocessing original user data records, removing invalid user data and then obtaining valid user data records; forming real-time visiting records of a monitoring place on the basis of the valid user data records, wherein the real-time visiting records include visit starting time and visit ending time which are generated by the time stamps; counting the frequency of users entering and/or leaving the monitoring region according to the geographical location of the WiFi probe and the visit starting time in the real-time visiting records of the monitoring place. According to the data processing method disclosed by ...