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Safety relay selection method based on fuzzy logic algorithm

A fuzzy logic algorithm and security technology, applied in the field of cognitive wireless networks, can solve the problem of high complexity of secure relay selection, and achieve the effect of small amount of calculation

Active Publication Date: 2015-10-14
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0011] In order to solve the problem of high complexity of security relay selection in the prior art, the present invention proposes a security relay selection method based on a fuzzy logic algorithm, which includes the optimization problem under a specific cognitive wireless network system model , the solution process and the simulation results

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  • Safety relay selection method based on fuzzy logic algorithm
  • Safety relay selection method based on fuzzy logic algorithm

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] The invention proposes a safety relay selection method based on a fuzzy logic algorithm. In the cognitive wireless network scenario, the relay is based on the amplification and forwarding mode. In order to ensure the security of the physical layer, a fuzzy logic algorithm is used to select a relay as interference and send interference noise. Taking into account the interference of the interference to the primary user, the rest of the relays cooperate to forward the information to achieve the maximum security combined rate. The fuzzy logic algorithm needs to use the channel state information from the relay to the destination and the total transmit power of the relay as fuzzy parameters.

[0025] The safety relay selection method based on the fuzzy logic algorithm proposed by the present invention is applied in a specific cognitive wireless netw...

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Abstract

The invention discloses a safety relay selection method based on a fuzzy logic algorithm, and belongs to the technical field of a cognitive wireless network. The method comprises the steps that a cognitive wireless network model is established; and a target function and constrained conditions are established for the system and optimization problem solving is performed. The fuzzy logic algorithm and a convex optimization method are compared so that results obtained through the two methods are similar, and the fuzzy logic algorithm only performs simple linear operation without performing complex iteration. Therefore, computation burden of fuzzy logic is proved to be less than that of convex optimization, and feasibility and low complexity of realizing the maximum safety combined rate in a cognitive relay network through the fuzzy logic algorithm can be indicated.

Description

technical field [0001] The invention belongs to the technical field of cognitive wireless networks, and in particular relates to a fuzzy algorithm-based safety relay selection method for cognitive wireless networks. Background technique [0002] With the rapid development of wireless communication, the supply and demand of wireless spectrum resources are becoming increasingly tense. Cognitive radio technology uses idle licensed spectrum resources for secondary use to improve the utilization of spectrum resources. Cognitive wireless networks have thus become the development trend of future wireless networks. [0003] Cognitive radio is a key technology to improve spectrum utilization in cognitive wireless networks. It provides basic spectrum information for cognitive wireless networks by detecting idle spectrum, so that the transmission parameters of the sender can be adaptively adjusted according to changes in the environment. ; And under the premise of not affecting the com...

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Application Information

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IPC IPC(8): H04B7/02H04L27/00H04B7/026
CPCH04B7/026H04B2201/692H04L27/0006
Inventor 郭莉黄丽娇康天宇章健伟
Owner BEIJING UNIV OF POSTS & TELECOMM
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