Self-organizing cognitive wireless network routing method

A cognitive wireless network and self-organizing technology, applied in the field of self-organizing network routing strategy, to achieve efficient end-to-end transmission, conducive to resource allocation, and high-speed effects

Inactive Publication Date: 2010-01-27
SOUTHEAST UNIV
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  • Abstract
  • Description
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Problems solved by technology

This particularity in spectrum usage brings new challen...

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  • Self-organizing cognitive wireless network routing method
  • Self-organizing cognitive wireless network routing method
  • Self-organizing cognitive wireless network routing method

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Embodiment Construction

[0021] Specifically: there is no control center in the network. Each node only determines the next hop node and the communication channel with the next hop node based on local information, and needs to select the optimal route according to certain routing criteria to achieve For communication from the source node to the destination node, the method has the following steps:

[0022] 1) At the beginning of the network, each node detects the surrounding wireless environment and exchanges information with neighbor nodes. According to the information obtained, the node determines the cost of different frequency bands;

[0023] 2) The cognitive node initiates the route discovery process on demand, and broadcasts a route request message RREQ (Route REQuest) on the control channel. The RREQ message carries information about the destination address, the band set of the sending node, and the current cumulative cost of the route;

[0024] 3) After receiving the request message RREQ, the interme...

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Abstract

The invention discloses a self-organizing cognitive wireless network routing method, relating to the problem of a self-organizing (Ad Hoc) network routing strategy based on cognitive radio. No control center is provided in the network, each node determines the next hop node as well as the channel communicated with the next hop node only based on local information, and chooses the optimal route to realize the communication from a source node to a destination node according to defined routing standard. According to the routing strategy of the invention, the transmission rate of multiple links obtained by distributed algorithm in the Ad Hoc network is closer to the optimal value obtained by the centralized algorithm, and simultaneously ensuring that more links can find communication paths.

Description

Technical field [0001] The invention relates to the problem of the routing strategy of an Ad Hoc network based on cognitive radio, and belongs to the technical field of routing in wireless communication. Background technique [0002] As a limited non-renewable natural resource, the frequency spectrum resource used for wireless communication has been strictly controlled by the government. In recent years, with the rapid growth of wireless communication services, there are fewer and fewer spectrum resources available for allocation, resulting in the current shortage of spectrum resources. However, some research results indicate that the large amount of precious spectrum resources that have been allocated have not been fully utilized, and they are even idle in many cases. Obviously, this is contradictory to the shortage of spectrum resources that is currently widely concerned. Therefore, the basic idea to solve the problem of the lack of spectrum resources is to maximize the utili...

Claims

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Application Information

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IPC IPC(8): H04W40/22H04W40/24H04W84/18
CPCY02D30/70
Inventor 潘志文吴春德尤肖虎
Owner SOUTHEAST UNIV
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