An on-demand distance vector routing method for wireless ad hoc networks

A wireless ad hoc network and distance vector technology, applied in wireless communication, network topology, advanced technology, etc., can solve problems such as broadcast flooding, routing overhead, etc., to suppress routing request flooding, reduce complexity, and reduce power consumption Effect

Inactive Publication Date: 2014-10-29
SOUTHEAST UNIV
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Problems solved by technology

[0007] Technical problem: The purpose of this invention is to provide a wireless ad hoc network on-demand distance vector routing method, which is an improved communication method based on a wireless ad hoc network on-demand distance vector routing protocol, in order to solve the problem of broadcast flooding in the route discovery process , routing overhead, communication stability and other issues

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  • An on-demand distance vector routing method for wireless ad hoc networks
  • An on-demand distance vector routing method for wireless ad hoc networks
  • An on-demand distance vector routing method for wireless ad hoc networks

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Embodiment Construction

[0036] The invention is mainly composed of expanding the function of Hello message, establishing a second-level neighbor table and increasing the function of route reply RREP hunting. Create a second-level neighbor table by extending the Hello packet; extend the RREQ message format to calculate the neighbor stability value, and each forwarding node will calculate the forwarding delay of RREQ according to the difference between the first-layer and second-layer neighbors; and route reply RREP by unicast Change to the broadcast method, and decide whether to "hunt" by evaluating the RREQ forwarding time difference, the difference between the first and second layers of neighbors, and the remaining hops. The communication performance of AODV routing protocol in wireless sensor network is improved through the above several ways.

[0037] Its concrete implementation method will be described below in conjunction with accompanying drawing:

[0038] First, if figure 2 The flow chart o...

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Abstract

The invention discloses an improvement method for an Ad-hoc-based on-demand distance vector routing protocol. The method is used for reducing the overall power consumption of a wireless network, and is applied to a large-scale wireless sensor network. According to the method, a secondary neighbor table is established by utilizing improved handshake period broadcast, and the broadcast direction and delay of a routing request frame are determined on the basis of information of the neighbor table; in addition, the broadcast of the routing request frame is pursued by routing reply frame broadcast, so that the effect of suppressing the flooding of a routing request is achieved; and a reply is given in a broadcast way, so that the most stable two-way link rather than an optimal path for broadcasting the routing request at a certain moment can be selected. The protocol is optimized by utilizing the secondary neighbor table, the routing reply pursuit broadcast and a neighbor stability algorithm, so that the routing overhead is reduced, and the network lifetime is prolonged.

Description

technical field [0001] The invention is suitable for large-scale wireless sensor networks, uses multi-level neighbor tables and "hunting" methods to solve the problem of routing request (RREQ) broadcast flooding, and uses multi-level neighbor tables to calculate network communication stability. It belongs to the technical field of wireless sensor networks. Background technique [0002] Ad-hoc On-Demand Distance Vector Routing (AODV) is developed on the basis of Dynamic Source Routing (DSR) and Destination Number Distance Vector Routing (DSDV). The characteristic is that it adopts the method of destination number distance vector routing number combined with the idea of ​​dynamic source routing and on-demand routing. In the path-finding phase, the source node broadcasts a routing request frame containing the address of the destination node, and the intermediate node forwards the numbered routing request to the destination node or other nodes that can reach the destination nod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W40/02H04W84/18
CPCY02B60/50Y02D30/70
Inventor 徐平平余自然
Owner SOUTHEAST UNIV
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