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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 the effect of resource allocation, high speed and efficient end-to-end transmission

Inactive Publication Date: 2010-12-29
SOUTHEAST UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

This particularity in spectrum usage brings new challenges to the design of ad hoc networks based on cognitive radio

Method used

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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, and 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 selection criteria to achieve For communication from a source node to a destination node, the method has the following steps:

[0022] 1) At the initial stage of the network, each node detects the surrounding wireless environment, exchanges information with neighboring nodes, and determines the cost of different frequency bands according to the obtained information;

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

[0024] 3) After the intermediate node re...

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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 torealize 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 ad hoc (Ad Hoc) network routing strategy based on cognitive radio, and belongs to the technical field of routing in wireless communication. Background technique [0002] As a limited and non-renewable natural resource, the 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 show that a large number of precious spectrum resources that have been allocated are not fully utilized, and are even idle in many cases. Obviously, this contradicts the current spectrum resource shortage that is widely concerned. Therefore, the basic idea to solve the problem of lack of spectrum resources is to maximize the utilization of existing spectrum. The eme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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