Method for supporting coding opportunity discovery of wireless ad hoc network
A network coding and opportunistic technology, applied in wireless communication, network topology, network traffic/resource management, etc., can solve problems such as the prediction of packet reception situation of neighbor nodes that cannot be one hop, and achieve upper-layer application transparency, good scalability, The effect of low overhead
Inactive Publication Date: 2012-11-28
NANJING UNIV
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However, the research of COPE is based on the Srcr routing protocol, which is a link-state routing protocol. Each node can obtain the topology of the entire network through routing interaction. For a large number of distance vector routing protocols, each node only needs to It can know the information of its one-hop neighbors, so it is impossible to accurately predict the packet reception of one-hop neighbor nodes, because the packets received by its own one-hop neighbors often come from its two-hop neighbors
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[0054] 1. Topology information interaction
[0055] 1) When a node wants to send a Hello message to a neighbor node, check its own routing table, calculate the number of its one-hop neighbor nodes, and record this value in the reserved field of the Hello message;
[0056] 2) For each routing entry, add one-hop neighbor node information and destination node information corresponding to the neighbor node at the end of the Hello message;
[0057] 3) Send Hello message.
[0058] 2. Obtain topology information
[0059] 1) Receive the Hello message sent by the neighbor node, and use the neighbor node information carried in the Hello message to know the one-hop neighbor of the neighbor node and record it;
[0060] 2) Using the destination node information of neighbor nodes in the Hello message, record the destination node information corresponding to the two-hop neighbors of each local node, for use when determining the two-hop predecessor node for receiving the packet.
[0061] 3...
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The invention relates to a method for supporting the coding opportunity discovery of a wireless ad hoc network. In the method, a neighboring node informs one-hop neighboring node information, which is maintained by the neighboring node, through topological information interaction and reaches a target node through one-hop neighboring nodes of the neighboring node; therefore, from topological information, that each node can know two-hop neighboring node information of the node and can be used for acquiring and receiving two-hop advancing relay information of a packet; after the packet is received, by using the symmetrical characteristic of a link, the receiving node can determine the two-hop advancing relay information of the packet through the source node address of the packet and two-hop neighboring information, and guesses the packet receiving condition of the one-hop neighboring nodes of the receiving node by using one-hop neighboring node packet receiving condition prediction technology; and finally, the network node can effectively discover coding opportunities by using the packet receiving conditions of the acquired one-hop neighboring nodes and by using a network coding method in COPE protocol, and execute network codes and improve throughput of the network.
Description
technical field [0001] The invention relates to a method for supporting wireless self-organizing network (Ad Hoc) network coding opportunity discovery, which belongs to the field of communication network protocol design. By adopting the method, the network node running the distance vector routing protocol can obtain the information required for network coding opportunity discovery with low overhead, so as to execute the network coding algorithm. Background technique [0002] The Ad Hoc network originated in the 1970s, when the Defense Advanced Research Project Agency of the United States proposed the concept of a multi-hop wireless packet network PRNET (multi-hopmulti-access packet radio network). The core function of the network is that the data generated by the wireless terminal can be transmitted to the destination terminal through a wireless base station or a mobile repeater (repeater) through multi-hop forwarding. The network transponder in PRNET can be mobile, and the...
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IPC IPC(8): H04W28/06H04W40/24H04W84/18
Inventor 董超陈贵海米志超王海
Owner NANJING UNIV