Routing method for distributed cognition radio network based on layer-striding design

The invention discloses a method for distributed type cognitive radio network routing based on cross-layer design, which belongs to the technical field of cognitive radio network. The method comprises the following steps: establishing a coloring multi-graph model according to useable frequency spectrum information acquired by node perception; transferring a cross-layer design routing algorithm tosearch the routing between a source node and a target node, and simultaneously selecting communication signal channels between adjacent nodes; and updating the topology of coloring multi-graph and interface number of the nodes. The routing method adopts the cross-layer design on the routing selection of a network layer and an MAC layer, and concretely optimizes routing hop number and adjacent hopinterfere under the condition of lower time complexity. The method is applicable to radio network, next generation heterogeneous network and so on.

Cognitive radio network routing method based on Markov process

The invention relates to a cognitive radio network routing method based on Markov process; the Markov process is adopted to analyze the reliability of the cognitive radio network routing, belonging tothe technical field of wireless communication. Channel-selectivity failure rate calculated by the invention analyzes frequency spectrum chance of cognitive network, frequency spectrum assignment androuting selection are combined, the frequency spectrum chance and the failure rate of the channel are taken as selected route and channel index, so as to enhance the robustness of the cognitive network while avoid interference to a master user, improve the practicability of a route protocol and the whole performance of the network.

Method for entity authentication based on secret sharing encryption

The invention discloses a method for entity authentication based on secret sharing encryption, which is suitable for a self-organizing network and relates to the field of safety-related application of a wireless network in an information safety technique. Aiming at the characteristics of limited energy consumption and storage of self-organizing network nodes, the scheme uses a secret sharing technique and a symmetric key algorithm to effectively reduce the authentication time delay and improve the network life time; and simultaneously, a plurality of times of authentications ensure that the safety is not reduced. Besides, when a cluster head is arranged in the self-organizing network, the invention also provides a power consumption minimization algorithm to shorten the distance of transmitted signals between nodes, effectively reduce the node energy consumption and improve the network life time.

Method of railway wireless environment path loss index estimation

A novel method for evaluating the loss index of railway wireless environment path is use in the railway wireless mobile communication system in which the radio wave propagation environment is rather complex. The method is an improvement of the evaluation method for the loss index of land mobile communication system path and is based on wedge-shaped diffraction model and cubic spline interpolation. The method requires the system to provide enough train measurement reporting samples, the time advance of the samples and the distance image take on a V shape, and topographic relief factor is already known. The scheme can effectively reduces the collection cost of evaluation data and selects appropriate evaluation parameter towards different radio wave propagation environment, thus being benefit to reduce computational complexity.

Multicast RWA method with signal power attenuation limit in all-optical network

The invention provides a multicast RWA method with signal power attenuation limit in an all-optical network, which is applied to the ranges of an all-optical metropolitan area network and other medium-scale all-optical networks. The method solves the problems of route selection and wavelength distribution in the all-optical network. The method comprises the following steps: updating a logical topology on each wavelength of the network in real time by a node; when a multicast request reaches, selecting the logical topology of one wavelength according to a determined sequence to establish a multicast tree; preferentially adding the node close to a source node as the basic principle of establishing the multicast tree; and for a destination node which cannot be added into the multicast tree, exchanging the wavelength to establish another multicast tree. The method has the main characteristics that temporary power and minimum power limits of a signal on each edge link are considered when the ...

Long-distance medical treatment real-time information communicating and exchanging method based on IPv6 network SIP (Session Initiation Protocol)

The invention relates to a long-distance medical treatment real-time information communicating and exchanging method based on an IPv6 network SIP (Session Initiation Protocol), belonging to the technical field of long-distance medical treatment communication. The long-distance medical treatment real-time information communicating and exchanging method is characterized in that each client comprises an SIP signalling processing module, an audio-video transmission module, an instant short message transmission module, a file transmission module, an electronic whiteboard information transmission module and a medical treatment curve transmission module, wherein the file transmission module, the electronic whiteboard transmission module and the medical curve transmission module adopt user-defined sending and responding messages, and the other modules adopt SIP protocol signalling standard messages. In addition, an SIP signalling control thread is arranged at each client, and the client realizes ...

Maximum probability-based cognitive radio multi-path multicast routing method

The invention provides a maximum probability-based cognitive radio multi-path multicast routing method, which belongs to the technical field of cognitive radio networks. The method mainly comprises the following steps of: obtaining link weight between adjacent nodes according to the link state information to perform channel selection; searching routes between a source node and a plurality of destination nodes by combining a cognitive radio multi-path multicast routing protocol with the channel selection and selecting a communication channel between adjacent nodes at the same time; and establishing a shortest-path multicast tree from a plurality of paths so as to meet bandwidth requirements. The maximum probability-based cognitive radio multi-path multicast routing method ensures that the selected path is the maximum probability stable path from the source node to the multicast destination node by estimating whether the link capacity of each cognitive node is greater than the required probability ...

Time synchronization method based on vehicle ad hoc network topology structure

The invention discloses a time synchronization method based on the vehicle ad hoc network topology structure. According to the feature that the overall distribution of the vehicles is characterized by I type, T type or X type, the vehicle with GPS facility is used as an initial time server; according to the concept of grading, the number of the neighbor nodes in the routing table is taken as the standard, synchronization is carried out while the optical sub-grade time server is selected, wherein the selected lower-grade time server is in accordance with the characteristic shape of the road and satisfies the requirement of having a plurality of unsynchronized lower-grade neighbor nodes. The invention is characterized in that: the synchronization and the selection of the optical sub-grade server are carried out at the same time, thus preventing the selected sub-grade server from failing caused by fast changing routing; multicast and shorter synchronizing information are adopted for time hack ...

Probabilistic routing method with limited time delay based on intermittent communicated self-organizing network

The invention provides a probability routing method applied in a discontinuously connected self-organizing network. The basic thought of the invention is as follows: judgment is made in advance whether to generate a message copy by utilization of the statistic distribution rules for node movement in the discontinuously connected self-organizing network and according to the required transmission probability RDP and transmission delay determined by a user message; the value of the required transmission probability RDP of the message copy generated is calculated; and the RDP value in the source message is updated. The method guarantees capability of transmitting the message within the determined forwarding time, meets the required transmission probability (RDP) value anticipated by a user, can control the transmission charges of the message according to the RDP value and the forwarding time requirement, gets rid of unnecessary message forwarding, and then effectively reduces the message transmission ...

A measuring system and method for routing stability of wireless self-organized network

The invention puts forward a measuring system of stability of a wireless self-organized network route and method thereof relating to the field of Adhoc network and stability measurement of the network. The system is composed of a positioning module, an obtaining module and a calculation module. Firstly a node translational speed vector and a position vector datum obtained by the positioning moduleand a transmission speed and a channel capacity datum obtained by the obtaining module are added to a RREP package of a route protocol to send to a source node, then analyzing and calculating the data information according to measuring calculation method provided by the invention and obtaining the dynamic stable domain of the network route by the source node. Furthermore, the dynamic stable domain obtained rapidly and linearly judges stability of the route.

Downhole wireless positioning method based on understanding

The invention relates to an underground target locating method, in particular to a cognitive-based underground wireless locating method. The locating method comprises the following steps: (1), establishing above-mine and underground cable and wireless connection networks; (2), arranging a three-dimensional coordinate at a fixed underground node as a beacon node; (3), measuring the distance between the beacon node and the neighboring nodes in a cognitive way; (4), calculating the distance of reaching three or more beacon nodes through a cognitive method, and then calculating the coordinates ofunknown nodes in a cognitive way; (5), and refining the obtained node coordinates in a mobile-cognitive way so as to improve the positioning accuracy. The method has the advantages that the method uses cognitive multiple transferring and distributed calculations to meet the high-precision, low-power, anti-damage needs in underground location; at the same time, the method uses the two-dimensional coordinates ...

Energy optimization multicast routing method based on cognitive self-organizing network

The invention belongs to a routing technology in the cognitive self-organizing network communication, more particularly relates to a method for building a time delay constrained energy optimization multicast tree and relating to frequency spectrum selection. The method comprises the following steps of: selecting a proper frequency band communicated with the on-tree node according to a calculated accumulated time delay and an adjacent node of the on-tree node; selecting nodes with small weight values to add into the tree by adopting different selection function calculation weight values according to whether a node of the next hop of a candidate node is a destination node or not; and confirming that all nodes are added into the multicasting tree and finishing the tree building. The method is used for building the multicasting tree by adopting a time delay-energy function mode, can make the consumed energy of the node in a network reach optimization and the time delay from an original source ...

Entity authentication method in wireless sensor network

The invention provides an entity authentication method in a wireless sensor network, relating to the application field related to sensor network security in information security technology. The invention can ensure the safe communication among nodes by authenticating the identity of nodes in the wireless sensor network. The authentication for determining whether a node is legal and trustable comprises node trust value management, trust group construction, and trust group updating so as to store corresponding trust value in the node. In the information transmission process, the node can determine the information transmission manner and path according to the magnitude of the trust value. The method can acquire effective security authentication strategy by using the ideal of node reputation and the trust group, and can obviate the problem of large calculation amount of digital signature by using public key algorithm, thereby to effectively reduce the authentication delay and improve the network ...

Mobile self-organizing network vehicle-mounted communication system

Disclosed is a vehicular communication system for a mobile self-organizing network, which relates to communication technology among a vehicular hardware terminal platform, vehicular self-organizing network communication, vehicular positioning, a vehicular network and other networks in certain ranges, and belongs to the vehicular self-organizing network related technical field. The system is characterized in that the hardware terminal platform of the system comprises a main board based on ARM framework, a wireless network communication device, an audio device, a GPRS/CDMA modem, a GPS satellite positioning receiving device, a storing device, a liquid crystal display with a touch screen, a GPRS/CDMA Ethernet card and the like. The communication system provides the vehicular communication hardware platform for the mobile self-organizing network, a network condition monitoring method and the relative communication technique; the communication system can be applied to the various geographical ...

Path establishing method for multi-domain wavelength routing optical network

The invention discloses a path establishing method for a multi-domain wavelength routing optical network, which belongs to the field of the wavelength routing optical network, is used for the establishment of a light path in the multi-domain optical network and can guarantee the safety and the high-efficiency in establishing the path. The method mainly comprises the following steps: a source nodesends a connection establishing request to a network manager, the network manager judges whether a destination node is in home-domain, if so, the destination node is selected out according to a domainrouting algorithm, the route to the destination node is calculated by the source node, and the light path from the source node to the destination node is established in accordance with a signaling protocol in order to complete the establishment of the light path from the source node to the destination node; otherwise, the source node in the domain where the network manager is present establishesthe ...

Mobile sensor network routing method based on region gradient updating

The invention discloses a mobile sensor network routing method based on regional gradient updating. The method is helpful for the application and development of wireless sensor network technology in China, and will take important roles in environmental monitoring and forecasting, emergency treatment of natural disaster, scientific expedition and exploration, intelligent family, urban traffic, management of large-scale garage and warehouse, safety monitoring of large-scale industry park and other fields. The invention mainly solves the problems of the protocol in prior art, including large energy expenditure and large storage space. The method comprises a base station constructs regional gradient and performs periodical regional gradient updating, so as to synchronizing the time of the entire network. When a source node transmits data to a merge mode, the source node constructs a link going through the merge node, so as to conduct data transmission. The invention is based on wireless sensor ...

Probabilistic routing method with limited time delay based on intermittent communicated self-organizing network

The invention provides a probability routing method applied in a discontinuously connected self-organizing network. The basic thought of the invention is as follows: judgment is made in advance whether to generate a message copy by utilization of the statistic distribution rules for node movement in the discontinuously connected self-organizing network and according to the required transmission probability RDP and transmission delay determined by a user message; the value of the required transmission probability RDP of the message copy generated is calculated; and the RDP value in the source message is updated. The method guarantees capability of transmitting the message within the determined forwarding time, meets the required transmission probability (RDP) value anticipated by a user, can control the transmission charges of the message according to the RDP value and the forwarding time requirement, gets rid of unnecessary message forwarding, and then effectively reduces the message transmission ...

Entity authenticating system and method of cognitive radio network based on hierarchical structure

The invention provides entity authenticating system and method of a cognitive radio network, which relates to the relevant applying field in information safety technology. The entity authenticating system and the method of the cognitive radio network based on a hierarchical structure ensure the safe communication between secondary users by authenticating the identities of the secondary users in the cognitive radio network. In the process of sending the authentication request by the secondary user, the credibility is judged, and the public key verification is allowed to further execute only in the premise that the condition is satisfied. The trusting mechanism can effectively prevent the malignant users from generating multiple attacks in the network. The safety is based on n RSA algorithm, and simultaneously the symmetrical keys and the public key system are combined. In the premise of ensuring that the authenticating safety is not decreased, the authenticating efficiency is greatly enhanced ...

Method for realizing measure prediction of network stability by using dynamic stable domain

The invention provides a method for realizing measure prediction of network stability by using a dynamic stable domain, and belongs to the technical field of cognitive radio network routing protocols and network performance evaluation. The method comprises the following steps of: establishing a 4-layer evaluation index system of a cognitive radio network routing protocol by utilizing a layering analysis method, wherein the system comprises a target layer, a criterion layer, an index layer and an alternative index layer from the top to the bottom; excavating the evaluation index data of the cognitive radio network routing protocol according to a rough set theory; determining a weight of the evaluation index by combining a knowledge information entropy concept, and lowering subjectivity of weight determination; and based on the combination of basic concepts such as a stable threshold sita, a stability dynamic stable domain delta P of an attribute set and a network stability P, realizing the ...

Blind frequency tracking algorithm based on multi-carrier of filter bank

The invention discloses a blind frequency tracking algorithm based on multi-carrier of a filter bank, which tracks an algorithm of a carrier frequency by utilizing cyclostationary statistical property of a carrier signal of the filter blank; designs the blind frequency tracking algorithm on the basis of deducing the carrier signal of the filter blank to meet cyclostationary, and estimates the mean-square error of the algorithm. The algorithm comprises the following steps: firstly, sampling a received signal r (t) to obtain r[n]; estimating disperse power spectral density Sr [k]; calculating relative functions of the received signal, and selecting a parameter alpha which enables component and model of each relative function to be maximal to be as an estimated parameter. The method of the invention verifies the performance of the mean-square error and error code through simulation experiments, and compares with the performance of the classical algorithm with the mean-square error and error ...

Method for selecting route of vehicle-mounted mobile ad hoc network based on direction information

The invention discloses a method for selecting a vehicle-borne mobile ad hoc network router based on direction information, and belongs to the ad hoc network router research field. The method is characterized in that the router establishment stage includes the following steps: when receiving a routing request message, a node determines whether the node is a target node; when the node is not the target node, a direction determination strategy is employed; only when the self-travel direction and the direction deviation marked by an RREQ is in a tolerate range, the self routing table is just examined; and whether the RREP is replied to or an RREQ data packet is forwarded to a source node is adjusted according to whether the node has the effective router reaching the target node, wherein whenthe data packet is forwarded, the direction information in the RREQ is required to be updated to the movement direction of the node, otherwise, the data packet is discarded. By adopting the method, the ...

Energy optimization-based cognitive radio multicast routing method

The invention belongs to the field of cognitive radio CR and in particular relates to multicast routing protocols in a CR network. The method provides an energy optimization-based CR multicast routing method. The method comprises the following steps of: establishing a network model; establishing a Cournot game model; calculating a profit function; solving Nash equilibrium; and establishing a multicast tree. The invention provides an energy optimization-based multicast routing algorithm in the CR network and efficient spectrum allocation rate is achieved by establishing a spectrum allocation model in the CR network according to a classical Cournot static model. And simultaneously, the problem of dynamic spectrum selection is solved by utilizing a mode of routing selection and spectrum allocation cross-layer design according to energy optimization and the thought of minimum increment capacity MIC and on-demand drive, and the multicast routing algorithm which is suitable for the characteristics ...

Secure lightpath establishment method based on automatically switching optical network (ASON)

The invention provides a secure lightpath establishment method based on an automatically switching optical network (ASON), relating to the establishment of lightpaths or light connection in a control plane of the ASON. The method can prevent malevolence or selfishness of internal nodes by employing the comprehensive wavelength reservation strategy to carry out integrity protection on the important objects in the GMPLS RSVP-TE message through the security mechanisms such as digital signature and message feedback. In addition, the method designs a corresponding key management mechanism according to the characteristic of close coupling between a routing module and a signaling module in the ASON and distributes a node public key certificate needed in the process of establishing the lightpath by adopting the PKLSA message of OSPF-TE. The method has the characteristics of fast lightpath establishment, short attack detection and low message load while ensuring secure establishment of the lightpaths ...

A measuring system and method for routing stability of wireless self-organized network

The invention puts forward a measuring system of stability of a wireless self-organized network route and method thereof relating to the field of Adhoc network and stability measurement of the network. The system is composed of a positioning module, an obtaining module and a calculation module. Firstly a node translational speed vector and a position vector datum obtained by the positioning module and a transmission speed and a channel capacity datum obtained by the obtaining module are added to a RREP package of a route protocol to send to a source node, then analyzing and calculating the data information according to measuring calculation method provided by the invention and obtaining the dynamic stable domain of the network route by the source node. Furthermore, the dynamic stable domain obtained rapidly and linearly judges stability of the route.

Multicast routing method based on sparse splitting network

The invention provides a multicast routing method based on a sparse splitting network, relating to the setup of multicast routes in a full splitting network. Based on the idea of the mobile cellular network partitioning, the invention dynamically partitions the full splitting network into a plurality of multicast zones and confirms a multicast agent (MA) in each zone, so as to manage the multicastservices and the multicast connection between destination nodes in the multicast zones. The multicast routing method comprises the following stages: Stage 1, partitioning the multicast zones and calculating and generating a primary multicast-tree (PMT) by source nodes; and Stage 2, establishing the multicast connection between the MAs and the destination nodes to form a complete multicast-tree (CMT), wherein the multicast routing algorithm based on the Steiner tree is adopted in both the stages. The invention has the following advantages: the calculation complexity of the multicast-trees in the ...

Multicast RWA method with signal power attenuation limit in all-optical network

The invention provides a multicast RWA method with signal power attenuation limit in an all-optical network, which is applied to the ranges of an all-optical metropolitan area network and other medium-scale all-optical networks. The method solves the problems of route selection and wavelength distribution in the all-optical network. The method comprises the following steps: updating a logical topology on each wavelength of the network in real time by a node; when a multicast request reaches, selecting the logical topology of one wavelength according to a determined sequence to establish a multicast tree; preferentially adding the node close to a source node as the basic principle of establishing the multicast tree; and for a destination node which cannot be added into the multicast tree, exchanging the wavelength to establish another multicast tree. The method has the main characteristics that temporary power and minimum power limits of a signal on each edge link are considered when the ...

Wavelength protection method based on wavelength utilization rate in single link

The invention provides a wavelength protection method based on wavelength utilization rate in a single link, and related link nodes have optical wavelength conversion capacity. The method introduces the concept of wavelength utilization rate, and requires that a network can calculate the wavelength utilization rate of each wavelength in a transmission link in unit time quantum according to the situation of transmission service; the calculation results are stored in an array in a descending order. When an error occurs to the wavelength in the link, first idle wavelength is searched in the link, if the idle wavelength exists, then the idle wavelength is used for alternative transmission; if the idle wavelength does not exist, then the wavelength utilization rate of the wavelength with error is extracted form the array stored with wavelength utilization rate, and the wavelength with the lowest wavelength utilization rate is searched in the array in reverse order for alternative transmission ...

Method for clustering vehicle mounted Ad hoc network based on signal connection strength

The invention discloses a clustering method for the in-vehicle Ad hoc network based on the signal strength, and provides a network clustering and maintaining method which starts with the vehicle directional information, and enables the vehicles running along the same direction to participate in the process that the same cluster is formed and maintained. After a node is initialized, tentative cluster-heads are established among the vehicles running along the same direction, neighbor linked lists are formed in the two-hop range of the tentative cluster-heads, the node which has the maximum nodal connection signal strength is a cluster-head node, and other nodes are common nodes or gateway nodes of the cluster; the maintenance process is based on the vehicle directional information and the nodal connection signal strength. As considering the vehicle directional information and the nodal connection strength signal, the invention has the advantages that the in-vehicle Ad hoc network clustering ...

Minimized bandwidth consumption multicast routing method based on label optimization

The invention relates to a multicast routing method, specifically provides a multicast tree establishing method on the basis of label optimization, and by using the method, multicast tree bandwidth cost is reduced and network bandwidth resources can be saved. According to the invention, a multicast tree, a topological diagram G of a given network, a source node s, a destination node set D=(D1, D2, ... Dk), are firstly established by adopting the existing method, a multicast tree having less forwarding nodes and using s as the root is found out by using the method. The invention has the following a beneficial effect that the method utilizes labels to optimize the existing multicast tree. The method comprises establishing a multicast tree by using the existing method, labeling the nodes in the tree according to a label rule, deleting forwarding nodes or changing them into leaf nodes by modifying the nodes abutting relationship rule and the label rule, therefore, number of the forwarding nodes ...

Random routing method based on risk assessment in multi-hop cognition wireless network

A random routing method based on the risk assessment in a multi-hop cognition wireless network, belongs to the wireless communication technology field and in particular includes: analyzing the reliability of the frequency spectrum chance in the cognition wireless network, executing the risk assessment for the frequency spectrum chance of the node, and improving based on an AODV method, combining the route selection and the frequency spectrum chance, namely, the available information of the channel to execute the design of the routing method. The random routing method based on the risk assessment in a multi-hop cognition wireless network provided by the invention, realizes the layer-across collaboration of the routing and the spectrum management, realizes the balancing between the switchingtime-delay and the interference for main user by routing via the risk index, decreases the delay caused by the frequency spectrum switching, improves the thruput of the network, and reinforces the practicability ...

Multi-path routing algorithm based on energy sensing reliability

The invention provides a multi-path routing algorithm based on energy sensing reliability, which comprises the following steps: judging the reliability of links at first to select a link for data transmission, and collecting and promptly updating cost information of the path; forming a set of paths towards a target node, calculating the predicted function value for cost balance of the paths, and arranging the paths in an ascending order; selecting paths with disjoining nodes from a set of the paths; and utilizing the predicted function value to selecte an optimal path which satisfies the reliability criteria and leads to the target node. The algorithm guarantees the routing stability and reliability, reduces the energy consumption of the network, represents a comprehensive solution to the problem of criteria for sequencing path parameters, and has high practicability in the high-mobility wireless independent network environment.

Hypergraph-model-based multicast key management method

The invention relates to the field of security related application of key management in an information security technology, in particular to a centralized key management method, which comprises (1) an establishment stage, (2) the addition of a member to key hypergraph updating and (3) the quitting of the member from the key hypergraph updating. When the member is added, three key updating messages are required by a hypergraph-based key management scheme and are given by formulae shown in the description. In the scheme, a hypergraph theory is utilized to effectively reduce a key storage space of a key server, the key storage space of the group member and server encryption overhead in the addition of the group member, ensure the forward security and backward security of a security group and achieve high extensibility.

Multi entity monitoring decision support system and method for downhole environment

The invention relates to an underground intelligent control system, particularly an underground environment multi-cognition solid monitoring decision support system and the method thereof, which can automatically detect the underground environment, adapt the underground environment integrally and achieve the effects of underground environment optimization, management optimization and personnel optimization. The underground environment multi-cognition solid monitoring decision support system comprises an operation management station, an exchanger, a system interface, an area controller, a fire-control monitoring station, a security monitoring station, an automatic control cabinet, a fire-control device and a security device. Compared with the conventional intelligent system, the underground environment multi-cognition solid monitoring decision support system as the multi-cognition solid system and the method thereof are characterized in that: the system and the method are capable of interacting ...

Time synchronization method based on vehicle ad hoc network topology structure

The invention discloses a time synchronization method based on the vehicle ad hoc network topology structure. According to the feature that the overall distribution of the vehicles is characterized by I type, T type or X type, the vehicle with GPS facility is used as an initial time server; according to the concept of grading, the number of the neighbor nodes in the routing table is taken as the standard, synchronization is carried out while the optical sub-grade time server is selected, wherein the selected lower-grade time server is in accordance with the characteristic shape of the road and satisfies the requirement of having a plurality of unsynchronized lower-grade neighbor nodes. The invention is characterized in that: the synchronization and the selection of the optical sub-grade server are carried out at the same time, thus preventing the selected sub-grade server from failing caused by fast changing routing; multicast and shorter synchronizing information are adopted for timehack ...

Method for resisting simulated main customer attack in cognitive radio

A method for resisting primary user impersonation attacks in cognitive radio belongs to the technical field of radio communication, particularly relates to sensing and processing of the signals in thecognitive radio system and identification of a signal source. The method comprises the following steps: reducing noise of a composite signal which is received during a spectrum sensing process, estimating number of the signal sources in the composite signal, and reconstructing various signals by a Capon beamformer; separating the signals of different radios, focusing the signals of different radios to separate out a transient signal and a modulation signal, analyzing the transient signal by wavelet transformation; extracting characteristic parameters and realizing identification of the signalsource. The method for resisting the primary user impersonation attacks helps realize effective identification of the signal source and effectively resist the primary user impersonation attacks; andthemethod ...

MANET routing protocol synthetic evaluation method based on credibility

The invention provides a MANET routing protocol evaluation method based on reliability and relates to mobile ad hoc network. Directed towards the problems that a plurality of indexes in the application evaluation of the mobile ad hoc network are ambiguous and the information embodying the indexes is not complete, the invention gives the definition of the reliability of routing protocol, constructs a MANET routing protocol reliability evaluation index model containing 21 specific indexes and deigns a method for evaluating the routing protocol reliability. The invention can limit the subjective factors evaluating the routing protocol performance to a rather little range, thus obtaining a more objective and more correct protocol reliability value and in particular to be used in the application evaluation of the mobile ad hoc network routing protocol. In reality, appropriate routing protocol can be selected according to the evaluation result given by the invention and the actual needs.

Tracking body diagnosis early warning nursing apparatus based on beyond 3G high speed wireless net

The present invention relates to the health and medical community monitoring field, the new generation high speed mobile communication field and the intelligent embedded system field. The device name is tracking body diagnosis pre-warning nursing device based on a rear 3G high speed wireless net. A set of medical sensor used for obtaining human body physiology data is also required to be matched with the device when in use. The technical problems to be solved includes obtaining the parameter of a multiple-parameter nondestructive examination medical sensor, analog-to-digital conversion of sensor signal, building a short distance miniature movable sensor network, accessing the rear 3G net in the air, a method of accessing the rear 3G net in the movable sensor network, a remote exact tracing method, etc. The key points are that the latest wireless mobile technology is adopted to nurse and diagnose the latent sudden disease carrier, the mental sickness patient, the parturient women, the organ ...

Method for selecting route of vehicle-mounted mobile ad hoc network based on direction information

The invention discloses a method for selecting a vehicle-borne mobile ad hoc network router based on direction information, and belongs to the ad hoc network router research field. The method is characterized in that the router establishment stage includes the following steps: when receiving a routing request message, a node determines whether the node is a target node; when the node is not the target node, a direction determination strategy is employed; only when the self-travel direction and the direction deviation marked by an RREQ is in a tolerate range, the self routing table is just examined; and whether the RREP is replied to or an RREQ data packet is forwarded to a source node is adjusted according to whether the node has the effective router reaching the target node, wherein when the data packet is forwarded, the direction information in the RREQ is required to be updated to the movement direction of the node, otherwise, the data packet is discarded. By adopting the method, the ...

DDMC-based delay-constrained multicast routing method

The invention belongs to a routing technology of the network communication, more specifically relates to a delay-constrained multicast tree which is established in multicast routing and conveniently used in a distributed environment, and also relates to a node adding or leaving method. The method comprises the following steps: 1) firstly, initializing a multicast tree T; 2) calculating key nodes;3) adding nodes to the tree; 4) searching all nodes v connected to the added nodes u, and then selecting the nodes with the minimum Cost(v) value to add to the tree; deleting all non-destination leafnodes to get the delay-constrained multicast tree. In the method, new indicator functions and link selection function are employed, time delay and cost are comprehensively considered, which guarantees performance of the multicast tree effectively. In addition, the method is simple, fast, low in time complexity, easy to be achieved in the distributed environment, and applicable to a practical application ...

MCDS (minimum connected dominating set)-based method for constructing delay limit multicast forwarding structure

The invention relates to a problem of minimizing the cost of a multicast routing forwarding structure in an AdHoc network, and construction of a delay limit multicast forwarding structure in a wireless network based on an MCDS (minimum connected dominating set) algorithm in a graph theory. According to particularity of a wireless signal transmission method, the cost and delay function in the wireless multicast routing are redefined. In the method for constructing the delay limit multicast forwarding structure based on the vertex coloring ideas in the graph theory, which is proposed based on the MCDS theory in the graph theory, by solving the MCDS, the purpose of constructing a multicast routing structure with the minimum cost is achieved, the concept of multicast routing delay limit is proposed, and the MCDS is constructed under the constraint. The algorithm is proved to be correct by the theoretical derivation, and the algorithm is proved to be effective by a lower approximate ratio compared ...

WSN-based underground safety monitoring system gateway equipment

The invention discloses WSN-based underground safety monitoring system gateway equipment, which comprises a microprocessor unit, a memory unit, a WSN radio-frequency transceiving unit, an Ethernet interface unit, an RFID (radio-frequency identification) unit, a buzzer early warning unit, a voice communication unit and a human-machine interface unit, wherein the microprocessor unit is a gateway core and implements data processing and task scheduling control according to a certain algorithm; the WSN radio-frequency transceiving unit finishes data transceiving of each node of a wireless sensor network; the Ethernet interface unit supplies an interface for communication between the gateway and an Internet network; the RFID unit provides services for underground personnel attendance check and fuzzy positioning; and the buzzer early warning unit and the voice communication unit realize gateway local alarm and IP voice call service between the gateway and a remote server under emergency. Thegateway ...

Down-hole water pump information collecting system and method based on sensor network

The invention relates to an underground water pump state detecting system, in particular to information acquisition based on a sensor network and the method thereof. At least three sensors are arranged on positions to be detected in the equipment; a control device is used for judging whether the sensors are normal according to the detecting value in accordance with the majority principle, then the detecting value of the normal sensor is selected to be used as a detecting result, and the abnormal sensor is shielded. Data captured by the sensors are transferred to a computer system through a wireless network and a wired network, the computer system automatically analyzes value exceeding the normal value, if the value exceeding the normal value exists, then a warning system is started. The invention has the advantages of rapid and simple installation and low cost. The water pump state data information acquisition is convenient and rapid, and accurate in transmission, thereby the production ...

Microwave photon filter construction capable of implementing negative coefficient

The invention relates to a microwave photon filter structure which can achieve a negative coefficient and belongs to the field of high-capacity microwave photon communication. The structure consists of a tunable light source (1), a 3db beam splitter (2), a semiconductor amplifier SOA (3), an attenuator or an amplifier (4), a coupler (5), a circulator (6), a Bragg grating (7) and an optoelectronic detector (8). The microwave photon filter structure has the advantages that the characteristic of achieving the negative coefficient of the microwave photon filter is achieved, and finally a light signal passing through a photodiode is converted into a radio frequency signal so that the function of filtering the radio frequency signal in an optical domain is realized directly.

An assister-based clustering method in Ad Hoc network

The invention is a clustering method based on assistance in Ad Hoc network relating the field of Ad Hoc network and clustering management in the network. The Ad Hoc network is a wireless network without infrastructure and the clustering management is a more efficient network module. Reasonable selection of the clustering head is significant for the Ad Hoc network adopting clustering structure. Theinvention provides a method clustering method based on assistance. The method reduces probability of the cluster node that would become network bottle neck in existing clustering method by selectinga cluster-establishing way of assistant node in the cluster for the cluster head, reducing data information process of the cluster node and saving energy of the cluster head, which is beneficial to manage the network and to improve performance of the network.

Multicast randomizing routing method based on virtual Stener tree

The present invention provides a multicast randomized routing method based on virtual stettner tree and relates to the multicast transmission of radio sensor network data. The present invention adopts a multicast route started by the source and driven by the requirement and introduces probability routing method in the process of choosing route; in this way, the infinite loop of algorithm can be effectively avoided; the node with the maximum probability is chosen as the next hop to ensure a robust route, which guarantees the smooth route and the smooth transmission of data and at the same time greatly prolongs the lifecycle of the network. The present invention is characterized by effective data transmission and long network lifecycle and is especially fit for dangerous environment where people are hard to enter; once the sensor nodes are configurated through a certain measure, the energy replacement in the pattern of battery or other patterns can not be realized and people can only implement ...

MANET routing protocol synthetic evaluation method based on credibility

The invention provides a MANET routing protocol evaluation method based on reliability and relates to mobile ad hoc network. Directed towards the problems that a plurality of indexes in the application evaluation of the mobile ad hoc network are ambiguous and the information embodying the indexes is not complete, the invention gives the definition of the reliability of routing protocol, constructs a MANET routing protocol reliability evaluation index model containing 21 specific indexes and deigns a method for evaluating the routing protocol reliability. The invention can limit the subjectivefactors evaluating the routing protocol performance to a rather little range, thus obtaining a more objective and more correct protocol reliability value and in particular to be used in the application evaluation of the mobile ad hoc network routing protocol. In reality, appropriate routing protocol can be selected according to the evaluation result given by the invention and the actual needs.

Unicast routing method based on collaborative awareness in wireless self-organizing network

The invention discloses a unicast routing method based on collaborative awareness in a wireless self-organizing network, belonging to the technical field of self-organizing networks. The method of the invention mainly comprises the steps of initialized region division, node addressing, position updating, position inquiry, position maintenance and performance optimization, and comprises the following concrete steps: numbering nodes in the process of network initialization; combining regional level numbers and ID numbers of the nodes and defining as RIHA addresses of the nodes; selecting home regions of the nodes by a simple mapping rule and carrying out position updating and position inquiry; and using MFR geographic forwarding as a forwarding policy of the protocol. Shown by performance analysis and simulation results of the protocol, SLARP has good expandability and universality and is suitable for medium and large networks.

Multicast randomizing routing method based on virtual Stener tree

METHOD FOR IMPROVING MILLING EFFICIENCY

The invention relates to a method for raising milling efficiency, especially for milling lead-zinc ore. During the milling operation, sodium silicate of 500-1000 g/t, or 10-12C alkylamine of 300-200 g/t, ether amine of 150-450 g/t are introduced in the minerals to be milled and the pulp concentration is controlled to 65-75% and pH value 5-11. The invented method may raise the processing quantity by 7-12% and save energy by 6.7-10.8%. The additives used are the regular agents for ore dressing in small quantity with no adverse effect on the following processing.

An interference signal generation device for car self-organization network

The invention relates to a car self-organizing network interference signal generator which consists of a channel selection and control module, an MAC unit and a baseband processor, an I / O modulation demodulation, an intermediate frequency (IF) and radio frequency (RF) processing unit, an antenna, etc. A bus interface adopts a USB pattern. The invention has three selective operating methods, each operating method can utilize a control module or a control program to realize the control on the channel scanning, thereby achieving the channel selection function and the power adjustment function. The generator can send out a physical signal according to the standards stipulated by IEEE802.11b. The invention has good practicality and programmability, and belongs to the inter-vehicle networking communication field, thereby being suitable for the testing of an inter-vehicle communication system.

Minimized bandwidth consumption multicast routing method based on label optimization

The invention relates to a multicast routing method, specifically provides a multicast tree establishing method on the basis of label optimization, and by using the method, multicast tree bandwidth cost is reduced and network bandwidth resources can be saved. According to the invention, a multicast tree, a topological diagram G of a given network, a source node s, a destination node set D=(D1, D2, ... Dk), are firstly established by adopting the existing method, a multicast tree having less forwarding nodes and using s as the root is found out by using the method. The invention has the following a beneficial effect that the method utilizes labels to optimize the existing multicast tree. The method comprises establishing a multicast tree by using the existing method, labeling the nodes in the tree according to a label rule, deleting forwarding nodes or changing them into leaf nodes by modifying the nodes abutting relationship rule and the label rule, therefore, number of the forwarding nodes ...

Localization subsystem of vehicle self-building net system and localization method thereof

Novel cognitive radio multi-channel MAC protocol

The invention provides a cognitive radio multi-channel measurement and control (MAC) protocol. The protocol has the basic thought of improving network performance by using the characteristic of dynamic change of frequency spectrum of a cognitive radio multi-channel environment. At a frequency spectrum cognition stage, the protocol discovers available idle frequency spectrum in a synchronous time slot mode by adopting a method for perceiving the frequency spectrum in sequence by a controller. Meanwhile, the protocol defines the channel availability, and preferably selects an idle channel with high availability for data transmission. The protocol ensures reduction of cognitive user conflicts and reliability of data channels in a cognitive radio network so as to improve the throughput of the cognitive radio network.

Routing method for distributed cognition radio network based on layer-striding design

The invention discloses a method for distributed type cognitive radio network routing based on cross-layer design, which belongs to the technical field of cognitive radio network. The method comprises the following steps: establishing a coloring multi-graph model according to useable frequency spectrum information acquired by node perception; transferring a cross-layer design routing algorithm to search the routing between a source node and a target node, and simultaneously selecting communication signal channels between adjacent nodes; and updating the topology of coloring multi-graph and interface number of the nodes. The routing method adopts the cross-layer design on the routing selection of a network layer and an MAC layer, and concretely optimizes routing hop number and adjacent hop interfere under the condition of lower time complexity. The method is applicable to radio network, next generation heterogeneous network and so on.

DDMC-based delay-constrained multicast routing method

The invention belongs to a routing technology of the network communication, more specifically relates to a delay-constrained multicast tree which is established in multicast routing and conveniently used in a distributed environment, and also relates to a node adding or leaving method. The method comprises the following steps: 1) firstly, initializing a multicast tree T; 2) calculating key nodes; 3) adding nodes to the tree; 4) searching all nodes v connected to the added nodes u, and then selecting the nodes with the minimum Cost(v) value to add to the tree; deleting all non-destination leaf nodes to get the delay-constrained multicast tree. In the method, new indicator functions and link selection function are employed, time delay and cost are comprehensively considered, which guarantees performance of the multicast tree effectively. In addition, the method is simple, fast, low in time complexity, easy to be achieved in the distributed environment, and applicable to a practical application ...

Mobile sensor network routing method based on region gradient updating

Entity authentication method in wireless sensor network

The invention provides an entity authentication method in a wireless sensor network, relating to the application field related to sensor network security in information security technology. The invention can ensure the safe communication among nodes by authenticating the identity of nodes in the wireless sensor network. The authentication for determining whether a node is legal and trustable comprises node trust value management, trust group construction, and trust group updating so as to store corresponding trust value in the node. In the information transmission process, the node can determine the information transmission manner and path according to the magnitude of the trust value. The method can acquire effective security authentication strategy by using the ideal of node reputation and the trust group, and can obviate the problem of large calculation amount of digital signature by using public key algorithm, thereby to effectively reduce the authentication delay and improve the network ...

Data acquisition system under mine

The invention relates to a mine monitoring technology, in particular to an underground mine data acquisition system based on an improved CAN bus. A data acquisition tributary station of the invention is connected with a general control center by adopting TCP/IP communication and connected with an underground monitoring module by a CAN interface. The invention has the advantages that the CAN field bus technology is adopted by the invention so as to ensure that a coal mine monitoring system becomes open. The data acquisition tributary station and a monitoring center are communicated by TCP while the data acquisition tributary station is communicated with the underground monitoring module by CAN. An address arbitration mechanism of the CAN bus solves the problem of bus transmission confliction in each station. The underground mine data acquisition system has simple structure, simple and convenient operation, complete data acquisition as well as fast and accurate data transmission and resolution ...

A self-organizing network routing method based on data message point-to-point decision making

The invention relates to the router design and research field of the mobile wireless self-organized network, which is more particularly characterized by including the flowing steps sequentially: the initial TTL values of the IP messages sent by all nodes are set to be 64. When the node sends an IP message, a router stored to a target IP is only sent to a next corresponding hop, or floods the messages to all the neighbors. When the node receives the IP message, the retransmitting hop times passed by the message can be analyzed according to the current TTL value of the message, and the shortest path to the source can be determined by combining the corresponding routing items of the node. The non-shortest routing produced in the process of flooding can be deleted for overtime as no corresponding IP message is transmitted. The invention realizes a novel rapid and simple Ad Hoc path-finding method with low protocol bandwidth consumption.

Method for guaranteeing security of single-transceiver time-slot type distribution CR MAC (Cognitive Radio Multiple Access Control) protocol

The invention provides a security mechanism with combination of a secure channel switching strategy and a curtain-style digital signature scheme, which aims at guaranteeing the security of a single-transceiver time-slot type cognitive radio C-MAC (Cognitive-Multiple Access Control) protocol and preventing possible channel preemptive-type denial of service attack. The method comprises the following steps of: carrying out random sequencing and encrypting by utilizing an available channel list so that malicious nodes can not monitor channel consultation information between communicating parties, thereby avoiding the malicious nodes from seizing channels; and secondly, establishing a signature scheme with a curtain-type relational structure by adopting two hash functions to solve the problem that the correlation of a plurality of signature process needs to be guaranteed when a cognitive ratio network adopts digital signatures. The invention guarantees the suspensive communication caused by ...

Multi entity monitoring decision support system and method for downhole entironment

The invention relates to an underground intelligent control system, particularly an underground environment multi-cognition solid monitoring decision support system and the method thereof, which can automatically detect the underground environment, adapt the underground environment integrally and achieve the effects of underground environment optimization, management optimization and personnel optimization. The underground environment multi-cognition solid monitoring decision support system comprises an operation management station, an exchanger, a system interface, an area controller, a fire-control monitoring station, a security monitoring station, an automatic control cabinet, a fire-control device and a security device. Compared with the conventional intelligent system, the underground environment multi-cognition solid monitoring decision support system as the multi-cognition solid system and the method thereof are characterized in that: the system and the method are capable of interacting ...

Method for resisting simulated main customer attack in cognitive radio

A method for resisting primary user impersonation attacks in cognitive radio belongs to the technical field of radio communication, particularly relates to sensing and processing of the signals in the cognitive radio system and identification of a signal source. The method comprises the following steps: reducing noise of a composite signal which is received during a spectrum sensing process, estimating number of the signal sources in the composite signal, and reconstructing various signals by a Capon beamformer; separating the signals of different radios, focusing the signals of different radios to separate out a transient signal and a modulation signal, analyzing the transient signal by wavelet transformation; extracting characteristic parameters and realizing identification of the signal source. The method for resisting the primary user impersonation attacks helps realize effective identification of the signal source and effectively resist the primary user impersonation attacks; and the ...

Inter-domain routing method based on distribution type multi-layer multi-domain optical network

The invention provides an inter-domain routing method based on a distribution type multi-layer multi-domain optical network, wherein the application range is the multi-layer multi-domain optical network and an automatic switch optical network. The method is characterized in that on the basis of full-mesh topology abstraction, the problems of the price of a virtual link and the number of the available wavelength are solved; the maximum number of the available wavelength of the route is combined with the minimum route arithmetic K in the inter-domain routing arithmetic so as to reduce the probability of inter-domain blocking because of lack of available wavelength and reduce the service blocking rate of the total network.

Spectrum perception method for detecting angle of arrival of authorized user in cognitive radio

The invention discloses a spectrum perception method for detecting the angle of arrival of an authorized user in cognitive radio, and relates to a spectrum perception method in a cognitive radio system, in particular to a method capable of detecting the signal and the angle of arrival of the authorized user. The method comprises the following steps that: a linear array antenna system receives the signal; the spatial spectrum of the signal is obtained through multiple signal classification algorithm; the statistical average of the spatial spectrum Lambda serves as judgment reference; the threshold Gamma which meets false alarm probability Pf is obtained through a test; Lambda and threshold Gamma are compared to judge if the authorized user exists; and if the authorized user exists, the angle of arrival of the authorized user is obtained through minimum optimization searching. The method for detecting the multi-dimensional information of the authorized use provides conditions for further ...

Method for clustering vehicle mounted Ad hoc network based on signal strength

The invention discloses a clustering method for the in-vehicle Ad hoc network based on the signal strength, and provides a network clustering and maintaining method which starts with the vehicle directional information, and enables the vehicles running along the same direction to participate in the process that the same cluster is formed and maintained. After a node is initialized, tentative cluster-heads are established among the vehicles running along the same direction, neighbor linked lists are formed in the two-hop range of the tentative cluster-heads, the node which has the maximum nodal connection signal strength is a cluster-head node, and other nodes are common nodes or gateway nodes of the cluster; the maintenance process is based on the vehicle directional information and the nodal connection signal strength. As considering the vehicle directional information and the nodal connection strength signal, the invention has the advantages that the in-vehicle Ad hoc network clustering ...

Inter-domain routing method based on distribution type multi-layer multi-domain optical network

The invention provides an inter-domain routing method based on a distribution type multi-layer multi-domain optical network, wherein the application range is the multi-layer multi-domain optical network and an automatic switch optical network. The method is characterized in that on the basis of full-mesh topology abstraction, the problems of the price of a virtual link and the number of the available wavelength are solved; the maximum number of the available wavelength of the route is combined with the minimum route arithmetic K in the inter-domain routing arithmetic so as to reduce the probability of inter-domain blocking because of lack of available wavelength and reduce the service blocking rate of the total network.

An assister-based clustering method in Ad Hoc network

The invention is a clustering method based on assistance in Ad Hoc network relating the field of Ad Hoc network and clustering management in the network. The Ad Hoc network is a wireless network without infrastructure and the clustering management is a more efficient network module. Reasonable selection of the clustering head is significant for the Ad Hoc network adopting clustering structure. The invention provides a method clustering method based on assistance. The method reduces probability of the cluster node that would become network bottle neck in existing clustering method by selecting a cluster-establishing way of assistant node in the cluster for the cluster head, reducing data information process of the cluster node and saving energy of the cluster head, which is beneficial to manage the network and to improve performance of the network.

MCDS approximation algorithm-based multicast route method with minimized resource consumption

The invention belongs to a route optimization technique in wireless network communication, relates to the problem of saving energy and bandwidth resource consumption of the wireless broadcast transmission in a wireless network, and provides a construction method for a distributive multicast tree with minimized network communication resource consumption based on the problem of MCDS (minimum connected dominating set) in a graph theory. Based on the established multicast tree, the MCDS approximation algorithm-based multicast route method with minimized resource consumption finds a maximum independent set MIS, and then finds all MIS nodes connected with of a dominating node set so as to obtain a dominating multicast tree. The method optimizes the resource consumption of the multicast communication in the communication network. Due to the broadcasting nature of a wireless medium, the bandwidth and energy consumption in the multicast communication mainly depends on the message relay times inthe ...

Cognitive radio multicast routing method based on delay constraint

The invention belongs to the field of a cognitive radio network, in particular to a design of a multicast routing protocol in a CR network. The invention comprises the following steps: 1. defining a cognitive radio network multicast routing model; 2. analyzing the characteristics of the cognitive radio network delay; 3. establishing a cognitive radio network frequency spectrum apportion model: i.e. a CR game model and a utility function; 4. resolving SoP information of each node in the network; and 5. according to the requirements, constructing a multicast routing tree which sequentially comprises the following steps: route discovery, route reply and route maintenance. The invention provides the construction process of the multicast routing method in the cognitive radio network, comprehensively considers delay and cost, and is simple and quick, effectively ensures the performance of the multicast tree, optimizes the utilization of the frequency spectrum, and is easy to be applied and realized ...

Repeated game-based multicast routing algorithm in cognitive wireless network

The invention relates to a routing selecting problem, belonging to the cognitive wireless multicasting routing field. A multicasting routing algorithm is designed aiming at dynamics and differentiation of wireless network frequency spectrum distribution. The algorithm of the invention mainly comprises the following steps: 1, establishing a single-stage game model of the multicasting routing algorithm; 2, participating in the end-to-end delay time of a node i; 3, establishing a multi-stage game model of the multicasting routing algorithm; and 4, checking the reliability of the algorithm. The routing history is participated in next routing by the invention, thereby simplifying redundancy of the algorithm. Moreover, based on the thoughts of repeated games in dynamic games, reputation is introduced into the routing so as to solve the problems that cognitive node not only ensures the selected route can meet the requirement of the minimal end-to-end delay time under the condition of not disturbing ...

Atomic force microscopic imaging method and device based on piezoelectric scanning tube dynamic property

The invention discloses an atomic force microscope imaging method and a device basing on the dynamic characteristic of a piezoelectricity scanatron. The method comprises the steps as follows: firstly, after the analysis of the signal of an AFM imaging part, the invention provides an improved imaging method with the dynamic characteristic of the piezoelectricity scanatron on the disadvantage that the imaging method of the prior atomic force microscope has great error under the high speed scan. The invention includes the procedures as follows: identification of mold, calibration of parameters, collection of necessary data for imaging and imaging. The invention effectively increases the imaging precision of AFM on the Z direction, thereby in particular improving the imaging precision under the high speed scan. The imaging device adopts the originality CSPM4000 and the provided signal accessing interface, and utilizes the great the timeliness of RTLinux to achieve the precise prompt feedback ...

Method for reducing peak-to-average power ratio of filter bank multi-carrier system

The invention provides a method for reducing peak-to-average power ratio of a filter bank multi-carrier system, and relates to the field of multi-carrier modulation method. The method comprises the following steps: the analysis of main factors affecting the peak-average power ratio of the FBMC system through the establishment of the FBMC system model and the definition of the peak-average power ratio of the FBMC system, the construction of an FSLM method and the check analysis of Monte Carlo simulation experiments, and is characterized in that: a frame selection mapping method is called as the FSLM method, is a signal non-distortion technique, selects sequences for FBMC signal frames and design frames, constructs FBMC carrier frame signals which have the same information and are independent from one another according to the frame selection sequences, and then selects a frame of symbols allowing the time domain signals to have minimum PAPR, and the method can reduce the PAPR of the FBMC ...

Method for realizing equalization of FBMC system by utilizing improved sphere decoding algorithm

The invention provides a method for realizing the equalization of an FBMC system by utilizing improved sphere decoding algorithm, which comprises the following steps: by setting up an FBMC system model, and defining FBMC system parameters, analyzing the main factors of the equalization algorithm performance affecting the FBMC system; carrying out the improved sphere decoding algorithm; and carrying out simulation experiments for the algorithm and comparing; and analyzing simulation results. The improved sphere decoding algorithm means that the equalization of the FBMC system can be realized by lowering the complexity of the sphere decoding algorithm, and comprises the following steps: defining the equalization of the FBMC system; and realizing the equalization of the FBMC system by the method of probability estimate of d'2-LB (k-1) >= | | zk: M-Rk: M, K: Mbk: M | | 2 to lower the complexity of the sphere decoding algorithm. The invention utilizes the improved decoding algorithm to lower ...

Energy optimization-based cognitive radio multicast routing method

The invention belongs to the field of cognitive radio CR and in particular relates to multicast routing protocols in a CR network. The method provides an energy optimization-based CR multicast routing method. The method comprises the following steps of: establishing a network model; establishing a Cournot game model; calculating a profit function; solving Nash equilibrium; and establishing a multicast tree. The invention provides an energy optimization-based multicast routing algorithm in the CR network and efficient spectrum allocation rate is achieved by establishing a spectrum allocation model in the CR network according to a classical Cournot static model. And simultaneously, the problem of dynamic spectrum selection is solved by utilizing a mode of routing selection and spectrum allocation cross-layer design according to energy optimization and the thought of minimum increment capacity MIC and on-demand drive, and the multicast routing algorithm which is suitable for the characteristics ...

Safety intelligent network processor

The invention provides a safe intelligent network processor, composed of three configurable devices, each of which is a PCB installed with functional chips. The system allocates various functions to the three devices, allows real-time reconfiguration and provides a standard component designed structure for improving developing independency and accuracy, and connection point for a whole test. A single device contains specific user initializing function and supporting part for real-time modifying the function, and the configurable device C contains the interface of user hardware and basic processing package, the configurable device B provides real-time user configuration function and the configurable device A provides system configuration control and certification supporting functions. This division allows external device to connect as user initializing configuration, and realizes real-time upgrading of processing channel. Its advantages: it can make high-speed and remote reset, easy to upgrade ...

An interference signal generation device for car self-organization network

The invention relates to a car self-organizing network interference signal generator which consists of a channel selection and control module, an MAC unit and a baseband processor, an I / O modulationdemodulation, an intermediate frequency (IF) and radio frequency (RF) processing unit, an antenna, etc. A bus interface adopts a USB pattern. The invention has three selective operating methods, eachoperating method can utilize a control module or a control program to realize the control on the channel scanning, thereby achieving the channel selection function and the power adjustment function.Thegenerator can send out a physical signal according to the standards stipulated by IEEE802.11b. The invention has good practicality and programmability, and belongs to the inter-vehicle networkingcomm unication field, thereby being suitable for the testing of an inter-vehicle communication system.

Multicast routing method based on sparse splitting network

The invention provides a multicast routing method based on a sparse splitting network, relating to the setup of multicast routes in a full splitting network. Based on the idea of the mobile cellular network partitioning, the invention dynamically partitions the full splitting network into a plurality of multicast zones and confirms a multicast agent (MA) in each zone, so as to manage the multicast services and the multicast connection between destination nodes in the multicast zones. The multicast routing method comprises the following stages: Stage 1, partitioning the multicast zones and calculating and generating a primary multicast-tree (PMT) by source nodes; and Stage 2, establishing the multicast connection between the MAs and the destination nodes to form a complete multicast-tree (CMT), wherein the multicast routing algorithm based on the Steiner tree is adopted in both the stages. The invention has the following advantages: the calculation complexity of the multicast-trees in the ...

Secure lightpath establishment method based on automatically switching optical network (ASON)

The invention provides a secure lightpath establishment method based on an automatically switching optical network (ASON), relating to the establishment of lightpaths or light connection in a control plane of the ASON. The method can prevent malevolence or selfishness of internal nodes by employing the comprehensive wavelength reservation strategy to carry out integrity protection on the important objects in the GMPLS RSVP-TE message through the security mechanisms such as digital signature and message feedback. In addition, the method designs a corresponding key management mechanism according to the characteristic of close coupling between a routing module and a signaling module in the ASON and distributes a node public key certificate needed in the process of establishing the lightpath by adopting the PKLSA message of OSPF-TE. The method has the characteristics of fast lightpath establishment, short attack detection and low message load while ensuring secure establishment of the lightpaths ...

Localization subsystem of vehicle self-building net system and localization method thereof

The invention provides a positioning subsystem for a vehicle ad hoc network system and a positioning method and relates to an embedding vehicle-mounted positioning subsystem platform in a certain range, a vehicle positioning technology and a method, moreover, the invention belongs to the related technical field of the vehicle ad hoc network. The invention is characterized in that the subsystem consists of a GPS satellite positioning receiving device, a movement direction sensor, a speed collection module, a storage equipment, etc., and adopts the way of combining the GPS satellite positioning technology and the sensor positioning technology. The positioning method is characterized in that when the GPS satellite positioning function is normal, the GPS satellite positioning technology can be adopted for reliable positioning; when the GPS satellite positioning function is unusual, the speed and the directional data of the present vehicle collected by the sensor are combined with the related ...

Wireless ad hoc network node perceived behavioral characteristic database

The invention provides a wireless ad hoc network node perceived behavioral characteristic database. The behavioral characteristic data of each node in a network is acquired by a layered perceiving system framework, and the acquisition of the behavioral characteristic data is concretely realized by six modules, namely a perceiving module, a classification module, an extraction module, a storage module, a management module and an application module, wherein the previous four modules realize the acquisition, classification, extraction and storage of the data; and the fifth and sixth modules realizes data management and information sharing in the whole network. A node map and a node minimum hop field are established in the application module, so that a routing protocol can quickly query data on position, hop and the like. Data fusion is performed at a cluster-head node to reduce frequent data interaction, so network expense is reduced. A node sleeping and awakening mechanism can obviously prolong ...

Under-well bi-directional voice direct-spreading through earth communication system and method

The invention relates to a mine communication system, in particular to a mine bi-directional speech direct-sequence spread-spectrum and through-the-earth communication system and method relating to the spread spectrum technique. A terrestrial television transceiver of the mine bi-directional speech direct-sequence spread-spectrum and through-the-earth communication system is communicated with a loop antenna and a handheld terminal, and the handheld terminal is communicated with a positioning device. A mine television transceiver is communicated with a mine loop antenna and a mine handheld terminal. A direct sequence spectrum communication system is arranged between the terrestrial loop antenna and the mine loop antenna. By adopting the proposal, the invention has the advantages of anti-interference, multi-path and low interception rate due to the direct-sequence spread-spectrum digital wireless communication system and can be used for bi-directional speech through earth communications.

Vehicle positioning intelligent answer apparatus

The invention provides a vehicle positioning intelligent responder and is composed of the function chips, GPS receiver, power supply and terminal device made up of the GSM modules. It connects with the vehicle monitoring center through the GSM. GPS receiver is used to receive the information of the receiving monitoring center and collect the data and the function chip will respond it reasonably after calculating. The wireless communication adopts the short message function of the GSM to send the location data of the vehicle and transmit the control signaling from the monitoring center. The vehicle monitoring center reports the real time traffic status. Its advantages are saving energy and space channel resource, reporting the real time traffic status precisely and solving the problem of the real time traffic report, GSP energy-saving and impropriating the space channel resource.

Random routing method based on risk assessment in multi-hop cognition wireless network

A random routing method based on the risk assessment in a multi-hop cognition wireless network, belongs to the wireless communication technology field and in particular includes: analyzing the reliability of the frequency spectrum chance in the cognition wireless network, executing the risk assessment for the frequency spectrum chance of the node, and improving based on an AODV method, combining the route selection and the frequency spectrum chance, namely, the available information of the channel to execute the design of the routing method. The random routing method based on the risk assessment in a multi-hop cognition wireless network provided by the invention, realizes the layer-across collaboration of the routing and the spectrum management, realizes the balancing between the switching time-delay and the interference for main user by routing via the risk index, decreases the delay caused by the frequency spectrum switching, improves the thruput of the network, and reinforces the practicability ...

Key updating method based on local information collaboration

The invention relates to a key updating method based on local information collaboration, applied to the field of network information secrecy. The method does not need network synchronization, a credible center is formed by node cooperation and broadcasts a key updating material in part of channels, accept nodes carry out cooperation forwarding and the key updating efficiency of Ad hoc network in multi-channel is enhanced, therefore, the updating efficiency of the method is reduced to n from o(n), wherein n is number of frequency bands. For ensuring the security during updating, the invention provides a ring signature based on a threshold mechanism so as to protect the anonymity of a trusted third party. The technical scheme can effectively resist attack of malicious nodes to key updating process.

Wireless field density test method based on correlation between sampling points

The invention discloses a radio field test method based on the correlation between sampling points in the technical field of mobile communication. The technical proposal is as follows: the test method comprises the following steps: the coverage of a field test cell is determined; the radial test path is chosen; the relation of the system error and the field parameter is determined; one parameter is fixed respectively to obtain two additional parameter best values; the local field instantaneous value is measured; different time fields at the same position can be averaged; and then the typical value field of different positions can be averaged to obtain the local filed typical value; at last, the data and the information of the geographical position can be recorded. The invention determines the best chosen values through fully considering the relation among the sampling point number, the sampling interval and the statistical interval length, and the sampling interval can be small that the ...

Multicast routing method based on cooperative sensing in wireless self-organizing network

The invention discloses a multicast routing method based on cooperative sensing in a wireless self-organizing network, which belongs to the technical field of self-organizing network. The method mainly comprises an initialization process, a broadcasting tree construction process, a branch trimming process and an optimization process. The invention uses cooperative sensing information between the network nodes, marks the nodes in the broadcasting tree construction process according to a certain rule, modifies the marks in the optimization process, establishes a Steiner tree meeting the set time delay constraint under the condition of low time complicity, and realizes the goals of fast tree construction and low communication cost of the constructed multicast tree. The invention is applicable to the wireless self-organizing network and the network environment for military use, commercial use and the like with nodes having the cooperative sensing capability.

Method of distributed configuration of protection of automatically switching optical network

The invention provides a method of distributed configuration under the protection of an automatically switching optical network (ASON), particularly a method of distributed configuration under the P-cycle (pre-configured cycle) protection of an ASON by combining the characteristics of the ASON, and a scheme used for carrying out the P-cycle distributed configuration, and the invention further provides a method of P-cycle protection against node and link failures in a network. The method comprises the following stages in the specific implementation: an initial configuration stage, a traversal search stage and a convergence stage. By configuring the P-cycle protection on the distributed basis, the invention can provide high-speed protection switching and ensure the high resource utilizationrate; and meanwhile, the invention can avoid the difficulties caused by changes in the network, and effectively reduce the traversal frequency of the algorithm, thereby effectively accelerating the P-cycle ...

Atomic force microscopic imaging method and device based on piezoelectric scanning tube dynamic property

Differential game-based cognitive radio (CR) system power control method

The invention relates to the field of cognitive radio (CR) and cellular mobile communication, in particular to a differential game-based CR system power control method. The control method comprises the following steps of: 1) constructing a CR system model; 2) designing a power extraction cost function and a power radiation hazard cost function; 3) constructing a power control differential game model; and 4) resolving feedback Nash equilibrium. In the method, the dynamic property of time continuity of an actual CR system is described well, a non-cooperative differential game model for controlling CR system power is established, a differential game-based distributed non-cooperative power control method is provided, and a feedback Nash equilibrium analytic solution is acquired. Through power control in a distributed non-cooperative power cognitive differential game (DNPCDG) algorithm, interference among cognitive users is effectively suppressed, so that total throughput is increased, and system ...

Heterogeneous multi-channel wireless sensor network based underground monitoring system

The invention discloses a heterogeneous multi-channel wireless sensor network based underground monitoring system and relates to the field of technical application of underground wireless sensor networks. In the invention, a heterogeneous networking mode of combining wired communication and wireless communication is adopted in the network architecture, and star-style topology is adopted in all subnets; a radio-frequency signal air interface and an asynchronous communication serial interface are used for forming two stages of networks by layers to finish the work of data transmission; the network comprises subnet data acquisition nodes ED-S, subnet data convergence nodes AP-S, backbone network receiving nodes ED-M and backbone network convergence nodes AP-M; the subnet data acquisition nodes ED-S comprise a sensor module, an energy management module and a radio frequency module which are mutually connected; and the subnet data convergence nodes AP-S, the backbone network receiving nodes ...

Wavelength protection method based on wavelength utilization rate in single link

The invention provides a wavelength protection method based on wavelength utilization rate in a single link, and related link nodes have optical wavelength conversion capacity. The method introduces the concept of wavelength utilization rate, and requires that a network can calculate the wavelength utilization rate of each wavelength in a transmission link in unit time quantum according to the situation of transmission service; the calculation results are stored in an array in a descending order. When an error occurs to the wavelength in the link, first idle wavelength is searched in the link,if the idle wavelength exists, then the idle wavelength is used for alternative transmission; if the idle wavelength does not exist, then the wavelength utilization rate of the wavelength with erroris extracted form the array stored with wavelength utilization rate, and the wavelength with the lowest wavelength utilization rate is searched in the array in reverse order for alternative transmission.

MCDS approximation algorithm-based multicast route method with minimized resource consumption

The invention belongs to a route optimization technique in wireless network communication, relates to the problem of saving energy and bandwidth resource consumption of the wireless broadcast transmission in a wireless network, and provides a construction method for a distributive multicast tree with minimized network communication resource consumption based on the problem of MCDS (minimum connected dominating set) in a graph theory. Based on the established multicast tree, the MCDS approximation algorithm-based multicast route method with minimized resource consumption finds a maximum independent set MIS, and then finds all MIS nodes connected with of a dominating node set so as to obtain a dominating multicast tree. The method optimizes the resource consumption of the multicast communication in the communication network. Due to the broadcasting nature of a wireless medium, the bandwidth and energy consumption in the multicast communication mainly depends on the message relay times in ...

A self-organizing network routing method based on data message point-to-point decision making

The invention relates to the router design and research field of the mobile wireless self-organized network, which is more particularly characterized by including the flowing steps sequentially: the initial TTL values of the IP messages sent by all nodes are set to be 64. When the node sends an IP message, a router stored to a target IP is only sent to a next corresponding hop, or floods the messages to all the neighbors. When the node receives the IP message, the retransmitting hop times passed by the message can be analyzed according to the current TTL value of the message, and the shortest path to the source can be determined by combining the corresponding routing items of the node. The non-shortest routing produced in the process of flooding can be deleted for overtime as no corresponding IP message is transmitted. The invention realizes a novel rapid and simple Ad Hoc path-finding method with low protocol bandwidth consumption.

METHOD FOR CONTROLLING ROBOT MOVEMENT AND ROBOT

A robot movement control method includes: acquiring position information about two adjacent obstacles located on two sides of a robot along the robot moving direction or a perpendicular direction to the movement direction, and calculating distance therebetween; determining whether the distance is greater than a first pre-set distance; defining a virtual obstacle boundary between the two adjacent obstacles if the distance therebetween is not greater than the first preset distance; and controlling movement paths of the robot by means of the virtual obstacle boundary. Also disclosed is a robot, including: a position acquisition module for acquiring position information of two adjacent obstacles, and calculating distance therebetween; a distance determination module for determining whether the distance is greater than a first pre-set distance; a boundary defining module for defining virtual obstacle boundaries; and a movement control module for controlling movement paths of the robot by means of the virtual obstacle boundary. 1. A method for controlling robot movement , comprising:acquiring position information of two adjacent obstacles located on two sides of a robot along a moving direction of the robot or a direction perpendicular to the moving direction, and calculating distance between the two adjacent obstacles;determining whether the distance between the two adjacent obstacles is less than or equal to a first preset distance;defining a virtual obstacle boundary between the two adjacent obstacles when the distance between the two adjacent obstacles is less than or equal to the first preset distance; andcontrolling moving paths of the robot based on the virtual obstacle boundary.2. The method according to claim 1 , wherein the acquiring position information of the two adjacent obstacles located on the two sides of the robot along the robot moving direction and the direction perpendicular to the moving direction comprises:along the robot moving direction or the ...