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Distributed blind channel aggregation algorithm in cognitive radio network to realize all-channel diversity

A cognitive wireless network and full-channel technology, applied in the field of distributed blind channel aggregation algorithm, can solve problems such as difficult to realize, small aggregation time, etc., and achieve high reliability, small aggregation time, and small average aggregation time

Active Publication Date: 2015-11-11
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0004] The present invention solves the problem that different degrees of required time or time slot synchronization in the existing aggregation methods are difficult to realize in actual use, and at the same time ensures the maximum diversity of multi-channel aggregation and a relatively small aggregation time

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  • Distributed blind channel aggregation algorithm in cognitive radio network to realize all-channel diversity
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  • Distributed blind channel aggregation algorithm in cognitive radio network to realize all-channel diversity

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] figure 1 It is a schematic diagram of the channel switching method of the transceiver node in the present invention. Assuming there are 4 channels available in the environment, figure 1 (a) indicates that user node A is in the state of no data transmission, and the channel traversal sequence generated by user node A is [2,4,3,1], which means that user node A switches in the order of 2-4-3-1 every round channel, and stay on each channel for 5T (T is the minimum time used to complete a negotiation). User node B is in the data sending state, and the channel traversal sequence of user node B is [4,3,1,2], which means that user node A switches channels in the order of 4-3-1-2, and at the same time, every time it switches to a channel Send a negotiation request frame and wait for a reply (time T).

[0019] figure 2 It shows the communication proc...

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Abstract

The invention discloses a distributed blind channel aggregation algorithm in a cognitive radio network to realize all-channel diversity. The method comprises the following steps that when no data in a user node need to be transmitted, frequency hopping is performed according to a fixed frequency hopping sequence; once the user node has a data transmission requirement, then the user node performs frequency hopping according to another fixed frequency hopping sequence, and transmits a frame to perform aggregation consultation request, after the user node receives the consultation request, the user node replies the consultation information and waits for receiving a data frame. The distributed blind channel aggregation algorithm in the cognitive radio network to realize all-channel diversity provided by the invention overcomes the disadvantages in the existing multichannel blind aggregation method that time or slot synchronization is needed and the aggregation diversity is deficient, and provides a multichannel blind aggregation method which does not need time or slot synchronization, the maximum assembly diversity can be guaranteed and the average aggregation time is small. Experiments show that the distributed blind channel assembly algorithm in the cognitive radio network to realize all-channel diversity provided by the invention is easy to be implemented, high in reliability and has certain anti-interference performance.

Description

technical field [0001] The invention belongs to the technical field of wireless communication networks, and relates to a distributed blind channel aggregation algorithm for realizing full channel diversity in a cognitive wireless network. Background technique [0002] With the continuous reduction of spectrum resources, it is increasingly important to increase the effective use of spectrum. Cognitive wireless networks, as a communication network that uses spectrum efficiently, have attracted more and more attention and research. In the past, people used the spectrum to divide the spectrum into fixed spectrum blocks and license the spectrum blocks to fixed users. However, authorized users cannot guarantee continuous and efficient use of the authorized spectrum blocks, which will cause spectrum holes in time. , due to the limited spectrum resources, the communication needs of other unlicensed users cannot be met. This will cause a spectrum hole on the one hand and no spectrum...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/382
Inventor 赵海涛魏急波李佳迅王杉马东堂王欣习勇
Owner NAT UNIV OF DEFENSE TECH
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