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152 results about "Multi-hop routing" patented technology
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Multi-hop routing (or multihop routing) is a type of communication in radio networks in which network coverage area is larger than radio range of single nodes. Therefore, to reach some destination a node can use other nodes as relays.
Method for multihop routing for distributed wlan networks
ActiveUS20050013253A1Error preventionFrequency-division multiplex detailsTransmission protocolMulti-hop routing
A method for multihop packet trasmissions in a wireless network involves establishing a multihop route through the wireless network. After establishment of the multihop route, transmission protocol parameter are altered to minimize delays for transmissions over the multihop route and at least one packet is transmitted over the multihop route according to the altered transmission protocol parameters. In a first embodiment, the altering of the transmission protocol parameters includes setting a NAV value at each node of the multihop route for a duration of the packet transmissions over the route. In an alternative embodiment, multihop packets are assigned a higher QoS value.
Owner:TELEFON AB LM ERICSSON (PUBL)
Reliable Packet Delivery Protocol for Geocast Protocol in Disconnected Vehicular Ad Hoc Network
InactiveUS20100060480A1Reliable and robust packet deliveryImprove reliabilityError preventionFrequency-division multiplex detailsGeocastBroadcasting
A method is provided for delivering data messages in an inter-vehicle ad hoc network. The inter-vehicle ad hoc network utilizes a multi-hop routing protocol for storing, carrying forward and distributing a data message to various vehicles traveling along the road. The method includes determining a first cluster consisting of a group of vehicles proximate to one another traversing along a road in a first direction. A determination is made as to which vehicles within the first cluster are trailer vehicles for re-broadcasting messages based on vehicle position within the first cluster. An event is detected in a travel path of the first cluster by one of the vehicles in the first cluster. The event is reported to other vehicles in the cluster. At least one vehicle in a second cluster moving in an opposite direction to the first cluster is detected. The data message is broadcast from the determined trailer vehicles to the second cluster.
Owner:GM GLOBAL TECH OPERATIONS LLC
Self-organization method of sensor network and mobile terminal system based on same
InactiveCN101951659AReduce overheadReduce the possibilityError preventionNetwork topologiesBidirectional transmissionEngineering
The invention discloses a self-organization method of a sensor network and a mobile terminal system based on the same. According to the self-organization method of a sensor network, a sensor self-organization network can be formed by all nodes according to a multi-hop route protocol based on link prediction survival time, the node can be directly communicated with a node within a node communication range and communicated with a node not within the node communication range through transfer of other nodes in a multi-hop manner. The mobile terminal system comprises more than three terminals which form a sensor network by using the self-organization method of the sensor network. The system can obtain position, speed and motion direction information of other terminals through position acquisition; terminals with abnormal occurrence can inform the abnormal information of left terminals; and multi-hop voice and video two-direction transmission can be realized. The self-organization method ofthe sensor network and the mobile terminal system based on the same have the advantages of good performance, multiple functions and wide application prospect.
Owner:SOUTH CHINA UNIV OF TECH
Forwarding method used for constructing multi-hop routing in wireless self-organizing network
InactiveCN101521895AEasy to buildGuaranteed accessibilityNetwork topologiesCommunications systemSelf-organizing network
The invention provides a forwarding method used for constructing multi-hop routing in a wireless self-organizing network, which is based on an ARP proxy system and a mixed routing system. The method comprises the following steps that: a monitoring module of each node monitors each message sent and received by the node in real time; adjacent hosts interact respective routing information in a single-hop range in real time; each node stores a partial or complete topology table of the whole network; when a certain node of the network sends an ARP request to a node which is not directly connected with the certain node, the certain node searches for a next-hop node and sends a routing detection message to the next-hop node according to a routing list; and if the route is reachable, the detection message is transmitted to a target node step by step and returns a routing reachable message, and ARP proxy tables are arranged at various nodes along the route, so a multi-hop route is established. The invention also comprises a method for maintaining and updating the route through modification of network topology detection. The invention also comprises a device used in the network, and describes a complete communication system shown in graph 1.
Owner:NANJING UNIV OF POSTS & TELECOMM
End-to-end considerate link control and routing in a multihop network
InactiveUS20090052327A1Efficiently assign and allocateImprove overall utilizationPower managementError preventionTransmitted powerComputer science
By introducing a novel parameter common to all links along the entire multihop route it is possible to more flexibly allocate, for each of a number of the links, a set of three interdependent link transmit parameters representative of link transmit energy, link transmit time or link transmit bandwidth or link code word consumption, and link transmit power. Basically, the common parameter is determined based on a given end-to-end (ETE) transmit parameter constraint for the entire multihop route. The idea is then to assign or allocate, for each considered link, the three interdependent link transmit parameters based on the common parameter and local link characteristics. In this way, all three link transmit parameters may (and generally will) be different between at least two links on the route when the links have different link characteristics, assuming that each link transmit parameter is also dependent on the local link characteristics. Preferably, the common parameter is determined in the process of optimizing a given objective ETE function.
Owner:TELEFON AB LM ERICSSON (PUBL)
Systems and Methods for Multi-Beam Optic-Wireless Vehicle Communications
ActiveUS20090310608A1Improve throughputUltra-low-overhead and high-throughput vehicle communicationEmergency connection handlingNetwork topologiesOptical wirelessIn vehicle
The present invention offers systems and methods for effective multiple-hop routing, multicasting and media access control for vehicle group communications that employ directional wireless radio technology. Multi-beam optic-wireless media and streamlined operations provide low-overhead communications among vehicles. Systems and methods are provided to maintain a quasi-stationary group of neighboring vehicles, enable high-throughput on-demand switching among multiple vehicles, enable group coding in the vehicle group to achieve higher throughput, and enable dynamic adjustment of link to maintain desirable vehicle group. The proposed solution builds upon the conception of a MAC-free wireless operation and quasi-stationary vehicular switched network to achieve ultra-low-overhead and high-throughput vehicle communications.
Owner:TOYOTA INFOTECH CENT U +1
Extremum disturbed particle swarm optimization based SDWSN energy-balanced routing algorithm
ActiveCN108566663AExtend the life cycleFlexible deploymentHigh level techniquesWireless communicationEnergy balancingWireless sensor networking
The invention relates to an extremum disturbed particle swarm optimization based SDWSN energy-balanced routing algorithm and belongs to the technical field of wireless sensor networks. The algorithm comprises the steps of firstly selecting a cluster head by giving consideration to residual energy, position and energy balanced information of nodes and utilizing improved extremum disturbed particleswarm optimization algorithm, and dividing the whole network dynamically into clusters different in size based on a distance from the nodes to the base station, node residual energy and the number ofneighbor nodes; and secondly, saving energy consumption during cluster division by adopting a way of performing global clustering and k local cluster head updating per each period; and finally, building a shortest routing tree based on factors such as link energy consumption, node residual energy and in-cluster node number by adopting a centralized mode by a sensor control server when multi-hop routing is built. The extremum disturbed particle swarm optimization based SDWSN energy-balanced routing algorithm can efficiently save energy and balanced network energy consumption and prolong the life circle of the network.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Cooperative clustering routing communication method based on grade area division in WSN
InactiveCN106304235AReduce consumptionEven consumptionNetwork topologiesHigh level techniquesWork performanceChain structure
The invention relates to a cooperative clustering routing communication method based on grade area division in WSN. The method includes that WSN is subjected to grade area division to realize the distributed non-uniform clustering, an improved LEACH algorithm is adopted in each area to perform self-adaptive clustering, and meanwhile, through the combination with the improved PEGASIS algorithm, the in-cluster nodes of a discrete cluster far away from the Sink node form a chain structure, and after the clustering is completed, the inter-cluster data transmission is carried out through multi-jump routing and cooperative transmission technology. In addition, the optimal cluster number is determined in each area of WSN and the clustering strategy is carried out, the clustering in the areas is uniform, the in-cluster nodes of the discrete clusters in the far areas form a chain to guarantee the node in each cluster in each area to consume energy equally, and the equal node energy consumption in the whole network is realized at the end, the life period of the whole network is prolonged, and the work performance of the whole network is improved.
Owner:GUANGDONG UNIV OF TECH
Multi-hop dynamic ad hoc network method of wide field sensor network
InactiveCN101909345AExtension allowedEnergy efficient ICTSynchronisation arrangementWide fieldMulti-hop routing
The invention provides a multi-hop dynamic ad hoc network method of a wide field sensor network, which comprises the following steps: a common node receives and transmits broadcast networking type data from a gateway and synchronizes the time of total network common nodes and the gateway according to an MAC time stamp; the common node processes the received broadcast networking type data, estimates the link quality of neighbor nodes, calculates the layer number per se and calculates a multi-hop routing tree produced by a corresponding father node; and the common nodes are periodically awakened and detect local data by using the stepped dispatching algorithm, receive and processe data from the upper layer, the same layer and the lower layer of the common nodes, persistently maintains the information of the neighbor nodes, updates the father node and the multi-hop routing tree, and transmits data from the lower layer and data produced per se to the upper layer. The wide field sensor network running Layer Mesh can be randomly deployed, and the Layer Mesh completes zero-configuration zero-supervision self-controlled networking, self-controlled energy-saving operation and self-controlled maintenance after deployment.
Owner:TSINGHUA UNIV
Multi-hop routing method with bandwidth reservation in wireless network
InactiveUS20070097892A1Rapid responseIncrease success rateNetwork traffic/resource managementRadio transmissionComputer scienceBandwidth reservation
Owner:HONG KONG APPLIED SCI & TECH RES INST
Method and apparatus for shortening multi-hop routes in a wireless ad hoc network
ActiveUS20170093687A1Small sizeShorten routeNetwork topologiesData switching networksWireless ad hoc networkSelf-organizing network
A method for routing data packets in a network comprising, at a first node of the network, establishing communication with a plurality of neighbor nodes in the network, determining a destination node for a data packet, determining a path for routing the data packet from the first node to the destination node, wherein the path comprises one or more relay nodes for relaying the data packet from the first node to the destination node, the one or more relay nodes comprising a first neighbor node of the plurality of neighbor nodes for receiving the data packet from the first node, identifying among the one or more relay nodes and the destination node a second neighbor node of the plurality of neighbor nodes, and in accordance with the identification of the second neighbor node, transmitting the data packet to the second neighbor node.
Owner:MITRE SPORTS INT LTD
Customized trans-regional and multi-hop routing method for wireless sensor network
InactiveCN101854666ADelayed deathPlay a complementary roleNetwork traffic/resource managementNetwork topologiesBalancing networkWireless mesh network
The invention discloses a customized trans-regional and multi-hop routing method for a wireless sensor network and belongs to the field of computer communication networks. According to the characteristics of a cluster routing algorithm and an alternate cycle in the wireless sensor network, a region concept is introduced, a control message is broadcasted to the entire network through a convergencenode, each node determines a region to which the node per se belongs according to the intensity of a received signal and direct communication among nodes which are far away from one another is avoided by limiting the regions. When cluster head election in a certain area fails in an alternate cycle process of the network, a supplementary cluster head is produced in the region and an appropriate multi-hop routing scheme is customized by constraining a trans-regional distance when inter-cluster routing is established. The method has the advantages of prolonging the survival time of the network, balancing node energy consumption of the network better, equalizing the distribution of dead nodes and expanding network scale which is suitable for a protocol.
Owner:NANJING UNIV OF TECH
Wireless intelligent measurement and control system of greenhouse
The invention relates to the field of microcomputer automatic control and in particular relates to a wireless intelligent measurement and control network system of a greenhouse. The system comprises wireless sensor nodes, wireless sink nodes, wireless control nodes and an optimal control station, wherein the wireless sensor nodes are used for acquiring different environmental information and biological information and transmitting data to the wireless sink nodes in a wireless multi-hop routing manner; the wireless sink nodes are used for carrying out appropriate sensing information fusion on the data obtained from the wireless sensor nodes and transmitting sensing information to the optimal control station through a middle-long distance wireless data transmission module; the optimal control station is used for calculating an optimal control strategy based on the sensing information by utilizing a crop expert system or generating a control command according to a command of a remote user or a short-range user in combination with status of various control equipment and sending the control command to the wireless sink nodes; and the wireless sink nodes are used for forwarding the control command to the wireless control nodes so as to control an executive device, thus achieving the purpose of optimal control on the environmental information.
Owner:宁波中科集成电路设计中心有限公司
Self-adaptive multi-level radio network signal lamp system and control method thereof
InactiveCN102081853ASimplify the construction processSimplifies electrical wiringControlling traffic signalsTotal factory controlRadio networksStructure of Management Information
The invention discloses a multi-level radio network-based self-adaptive signal lamp system and a control method thereof. The system is characterized by consisting of a management terminal, a gateway electronic control unit (ECU), a signal driving test ECU, and a vehicle detecting ECU; in the invention, the gateway ECU, the signal driving test ECU, and the vehicle detecting ECU arranged at each intersection are respectively taken as a coordinator, a router and a terminal node of ZigBee network for performing network and layout; the excellent characteristics of radio sensing network, such as self-organization, multi-hop routing, etc. are kept; the integral robustness, reliability and maintainability are improved; and the construction and electrical wiring are simplified. The global system for mobile communications (GSM) interface of the gateway ECU makes the management terminal and a plurality of intersections realize a green wave band coordination control function in short message internet manner. Based on a hierarchical control system of a multi-level network structure, the system can be used for handling overall traffic flow intelligence dispersion on a large scale, and has the characteristics of capability of independent running at a single intersection and keeping system intelligence even a management terminal network system fails.
Owner:HEFEI UNIV OF TECH
Machine tool working condition real-time monitoring system based on wireless sensor network
InactiveCN103786071ASolve the problem that the signal cannot be transmitted by cableSolve space problemsMeasurement/indication equipmentsTorque sensorMulti-hop routing
The invention relates to a machine tool working condition real-time monitoring system based on a wireless sensor network. The torque, the temperature of a motor, the cutter loss condition, the workpiece clamping condition and other parameters are measured through a torque sensor, a temperature sensor and other corresponding sensors installed on a machine tool. Data are sent in a wireless and multi-hop routing mode, and after receiving a signal, a single chip microcomputer processes the signal in a simple mode. The single chip microcomputer sends the data to an upper computer, final processing and displaying are carried out through software, and if data are abnormal, an alarm is given in real time, intelligent feedback is achieved, and related actions are carried out for processing. All machine tools in a factory are merged into the network, the networking real-time monitoring of production machines of the factory is achieved, and the monitoring cover degree and real-time performance are greatly improved.
Owner:李宁 +12
Active-avoidance-based routing in a wireless ad hoc network
InactiveUS8509060B1Quick discoveryError preventionFrequency-division multiplex detailsNatural barrierWireless ad hoc network
Conventional multi-hop routing of ad hoc wireless networks involves considerations such as costs, connection quality, distances, and numbers of hops. A conventional wireless routing algorithm may fail when a destructive event takes place and is rapidly expanding in area, as the route discoveries may perpetually lag behind the rate of expansion of the destructive area. As typically embodied, the present invention's wireless routing algorithm detects a destructive event early, assumes rapid expansion of the destruction area, establishes “subnets” of nodes, and predetermines one or more routes that circumvent the rapidly expanding destruction area by exiting from and returning to the subnet in which the destructive event originates. Typical inventive practice avails itself of the architectural character of the physical setting for the wireless network, for instance by establishing subnets corresponding to compartments formed by wall-like structures (e.g., shipboard bulkheads), which represent natural barriers to expansion of a destruction area.
Owner:THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY
Clustering multi-hop routing protocol of wireless sensor network
InactiveCN105072661AExtend the life cycleEnergy averageNetwork topologiesHigh level techniquesWireless mesh networkReal-time data
The invention provides a clustering multi-hop routing protocol of a wireless sensor network. In network initialization, each node forms a cluster according to position information, A sink node acquires all clusters in the network. Data transmission is initialized by the sink node. Furthermore routing from the sink node to a target cluster between cluster heads which are dynamically selected is formed in real time. The cluster head of the target cluster acquires local data local data (such as real-time data of a certain cell in the cluster) and transmits the local data to the sink node. In the establishing process of the routing, the intermediate node of the routing utilizes estimated cost for deciding a next-hop node. The estimated cost comprises a distance between a normalized intermediate node and the residual energy of the node. The clustering multi-hop routing protocol is mainly used for the field of wireless sensing network routing control.
Owner:STATE GRID CORP OF CHINA +3
Route optimization method for tree shape wireless sensor network
ActiveCN104853398AExtend your lifeSolve the problem of uneven distribution of cluster head nodesHigh level techniquesWireless communicationEngineeringNetwork address
The invention discloses a route optimization method for a tree shape wireless sensor network. The method comprises the following steps: tree topology establishing: calculating node residual energy on the basis of a WSN physical topology, selecting cluster heads by turns through adjusting threshold values T (n) of the cluster heads, and establishing a tree topology structure wireless network; network address generating and path generating: generating a network address based on the position of nodes in the tree shape network, generating a multi-hop routing between any two nodes according to the network address to ensure that the information between nodes in the network can be transmitted in a multi-hop manner. The method of the invention is optimized on the basis of classical LEACH protocol, and can be used for adding the residual energy and distance between nodes in a cluster-head selection algorithm design, and a network address generating method can be used for objectively reflecting spatial position of the nodes. Because the nodes do not need to maintain an enormous routing table, the method of the invention avoids rapid loss of energy brought by frequently updating the routing table by the sensor network, saves hardware cost and provides the basis for multi-hop communication among nodes.
Owner:苏州博联科技有限公司
Cluster tree hierarchical wireless sensor network routing method with optimized energy efficiency
InactiveCN103781143AEfficient use ofReduce communication costsNetwork topologiesHigh level techniquesExtensibilityEnergy balanced
The invention discloses a cluster tree hierarchical wireless sensor network routing method with the optimized energy efficiency. The method includes the first step of automatically and dynamically organiing clustering during a cluster construction period, the second step of carrying out random selection on cluster head nodes according to the energy balance principle through the consideration on node energy factors, the third step of utilizing a minimum spanning tree Prim algorithm to construct a cluster tree hierarchical network route, namely, points in the Prim algorithm correspond to the cluster head nodes selected in a wireless sensor network, and the weights of sides correspond to energy weighting distances between the cluster head nodes, and the fourth step of constructing the cluster head nodes to a multi-hop routing network structure. Through the protocol, the cluster heads are reasonably selected in the application of the wireless sensor network which is powered through the energy harvesting technology, and consequently effective utilization of energy can be achieved, the communication cost between the nodes is reduced, the problem of the premature death of the cluster head nodes due to long-distance communication is solved, and the prolonging of the lifetime of the whole network is facilitated; in addition, the application of the spanning tree algorithm enhances the expandability of the protocol.
Owner:SOUTHEAST UNIV
An active sensor network system and mobile node device for monitoring the dangerous environment conditions
InactiveCN101060648ASolve network deploymentSolve the monitoring environmentNetwork topologiesData switching by path configurationWireless mesh networkMobile technology
The disclosed active sensor environment faced to danger environment comprises: a client computer, a BS as a gateway between the client computer and mobile node, and some mobile nodes sending collected environment data to BS, wherein the BS repacks data from node and sends to the client computer, receives and decomposes command from the computer, and single jump routes or multiple jump routes to different node. This invention combines wireless sensor network and mobile robot technology, and provides a way for detecting danger environment.
Owner:SOUTHEAST UNIV
Wireless vibration detecting and warning system
InactiveCN101221682AOvercome difficultyOvercome costsVibration measurement in solidsAcceleration measurementLine sensorTransceiver
The invention discloses a wireless vibration and detection alarm system, which comprises a wireless vibration and detection node and a 485 gateway node. The wireless vibration and detection node comprises a vibration signal detector, a RC filter, an A / D signal sampling module, an alarm signal processing module, a radio frequency control module I, and a radio frequency transceiver I, which are connected together in turn. The alarm signal processing module is also connected with a local alarm. The 485 gateway node comprises a radio frequency transceiver II, a radio frequency control module II, a serial data communication module II, a 485 drive circuit, and a 485 interface, which are connected together in turn. The radio frequency transceiver I is wirelessly connected with the radio frequency transceiver II, thereby realizing wireless signal communication between the wireless vibration and detection node and the 485 gateway node. The invention has the advantages that: the advanced wireless sensor network technology and the intelligent routing algorithm are adopted to realize automatic networking and remote control without special setups; a full duplex multi-hop routing mode is adopted in the data communication, thereby bringing about a large network capacity and a large covering surface; the invention overcomes the defects of great difficulty in system wiring, high maintenance cost, poor invisibility, vulnerability to damage, etc. in the prior detection system, thereby being adapted to harsh field environment.
Owner:徐承东
Reliable packet delivery protocol for geocast protocol in disconnected vehicular AD HoC network
InactiveCN101668349AReliable and robust transmissionImprove reliabilityNetwork topologiesAnti-collision systemsGeocastBroadcasting
A method is provided for delivering data messages in an inter-vehicle ad hoc network. The inter-vehicle ad hoc network utilizes a multi-hop routing protocol for storing, carrying forward and distributing a data message to various vehicles traveling along the road. The method includes determining a first cluster consisting of a group of vehicles proximate to one another traversing along a road in a first direction. A determination is made as to which vehicles within the first cluster are trailer vehicles for re-broadcasting messages based on vehicle position within the first cluster. An event is detected in a travel path of the first cluster by one of the vehicles in the first cluster. The event is reported to other vehicles in the cluster. At least one vehicle in a second cluster moving in an opposite direction to the first cluster is detected. The data message is broadcast from the determined trailer vehicles to the second cluster.
Owner:GM GLOBAL TECH OPERATIONS LLC
Multi-hop communication method based on distributed medium access control
InactiveUS20110149958A1Easy to routeData switching by path configurationWireless commuication servicesBeacon frameMedia access control
Disclosed herein is a multi-hop communication method based on distributed medium access control. In the multi-hop communication method based on distributed medium access control according to the present invention, a beacon frame which includes a first multi-hop information element is generated and transmitted to a neighboring device so as to search for a route to an external device which does not belong to a beacon group. A third multi-hop information element, which is generated based on a second multi-hop information element generated by the external device, is received from the neighboring device. A multi-hop route to the external device is set up in accordance with the third multi-hop information element, and data is transmitted to the external device. Therefore, a multi-hop route between devices in the extended beacon group can be efficiently set up.
Owner:ELECTRONICS & TELECOMM RES INST
WSN (wireless sensing network) survivable routing method and survivability evaluation model based on clusters
InactiveCN103501512AImprove survivabilityReliable deliveryNetwork traffic/resource managementWireless network protocolsNODALWireless mesh network
Owner:PLA UNIV OF SCI & TECH
A clustering routing method for wireless sensor networks based on fuzzy control
ActiveCN102281608AEfficiencyImprove self-organization characteristicsEnergy efficient ICTNetwork topologiesWireless mesh networkWireless sensor networking
The invention discloses a wireless sensor network clustering routing method based on fuzzy control. The fuzzy control is used for carrying out experiential, intuitive, simple and intelligent control on cluster head selection, cluster routing selection, inter-cluster routing selection and cluster head data fusion. The fuzzy control is introduced in the clustering routing method disclosed by the invention to ensure that cluster heads can be uniformly distributed, thus the cluster heads are avoided being distributed in the same region. In addition, a distributed asynchronous cluster head selection is used in the invention, the cluster heads are replaced externally transparently, data transmission of the whole network is not interrupted due to reconfiguration of a cluster, data downlink transmission and frequent cluster head replacement are avoided; and an inter-cluster multi-hop cluster is optimized and reconfigured based on a static cluster head tag table, low energy consumption and high efficiency performance of routing are ensured, and network self-organizing ability is increased.
Owner:NANJING UNIV OF POSTS & TELECOMM
Least effort delivering zone-spanned virtual cluster multi-hop routing method
InactiveCN101917750AEfficient use ofEvenly distributedNetwork topologiesHigh level techniquesBalancing networkNetwork size
The invention discloses a least effort delivering zone-spanned virtual cluster multi-hop routing method, and belongs to the field of computer communication networks. In the method, a control message is broadcast to an entire network by a sink by introducing a zone concept based on a low energy adaptive clustering hierarchy (LEACH) protocol according to the characteristics of a clustering multi-hop routing algorithm in a wireless sensor network; the zone to which each node belongs is determined by the node according to received signal intensity; and the direction of the multi-hop routing is specified through the limitation of the zone. During the network polling circulation, when a zone fails to select the cluster, the network generates a complementary cluster at the zone; and when the routing is established, the cluster is virtualized into one node to prevent direct communication between clusters with longer distance and perform the least effort delivering. The method can prolong the survival time of the network, balance the energy consumption of the node of the internet well, homogenize the distribution of dead nodes and expand the network size suitable for the protocol.
Owner:NANJING UNIV OF TECH
Method for multihop routing for distributed WLAN networks
ActiveUS7443822B2Network traffic/resource managementNetwork topologiesTransmission protocolMulti-hop routing
A method for multihop packet trasmissions in a wireless network involves establishing a multihop route through the wireless network. After establishment of the multihop route, transmission protocol parameter are altered to minimize delays for transmissions over the multihop route and at least one packet is transmitted over the multihop route according to the altered transmission protocol parameters. In a first embodiment, the altering of the transmission protocol parameters includes setting a NAV value at each node of the multihop route for a duration of the packet transmissions over the route. In an alternative embodiment, multihop packets are assigned a higher QoS value.
Owner:TELEFON AB LM ERICSSON (PUBL)
Building state monitoring and escape guiding system and building state monitoring and escape guiding method
InactiveCN103024064AFlexible and dynamic instructionsLow costTransmission systemsNetwork topologiesThe InternetTree shaped
A building state monitoring and escape guiding system comprises a wireless node, a local base station and a remote monitoring center, wherein the wireless node comprises wireless sensing nodes, wireless lamplight indicating nodes and routing nodes, and the local base station comprises a front-end wireless interface and a local monitoring center. The wireless node is arranged in a monitoring area, communication among the wireless sensing nodes, the wireless lamplight indicating nodes and the routing nodes as well as among the routing nodes and the front end of the local base station is achieved through a tree-shaped networked ZigBee multi-hop routing protocol, the wireless sensing nodes transfer building environment information and building structural information in the monitoring area to the front end of the local base station through a wireless channel, the front end of the local base station forwards the information to the base station monitoring center through a serial port, command information of the base station monitoring center is broadcast through the front-end wireless interface, and the remote monitoring center accesses to the local base station monitoring center through a local area network. The building state monitoring and escape guiding system is in communicated connection with a wireless network so as to form a small server to share disaster information with the outside through the Internet.
Owner:SOUTHEAST UNIV
Non-uniform clustering routing method suitable for subway tunnel
InactiveCN104135751AHigh level techniquesWireless communicationQuality of serviceThree-dimensional space
The invention relates to a non-uniform clustering routing method suitable for a subway tunnel. The method is applied to aggregation nodes and sensor nodes arranged on the inner wall of the subway tunnel. The method specifically comprises the following steps: establishing a tunnel three-dimensional space model; performing network initialization based on fixed nodes; performing clustering formation based on node remaining energy and node positions; and establishing inter-cluster multi-hop routing based on network quality of service (QoS), the node remaining energy and the node positions. Compared with the prior art, the non-uniform clustering routing method has the advantages that non-uniform clustering is finished by adopting a cluster head competition algorithm based on the node remaining energy and a cluster radius, and a cluster structure, the node remaining energy and a link bit error rate are considered comprehensively so as to optimize a multi-hop path in a super-long line.
Owner:TONGJI UNIV
Inter-cluster multi-hop routing algorithm of energy consumption balance in wireless sensor networks
ActiveCN108712767AExtend the life cycleBalanced energy consumptionNetwork topologiesWireless mesh networkWireless sensor networking
Owner:BEIJING INFORMATION SCI & TECH UNIV
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