Adaptive cooperative spectrum sensing method and system based on optimal relay

A cooperative spectrum sensing and self-adaptive technology, applied in the direction of advanced technology, climate sustainability, sustainable communication technology, etc., can solve the problems of perceptual channel fading relay energy consumption, etc., to achieve risk reduction, good robustness, high performance Good results

Active Publication Date: 2019-05-03
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] The purpose of the present invention is to propose an adaptive cooperative spectrum sensing method based on the optimal relay for the problems of fading of the sensing channel and high energy consumption of the relay in the existing cognitive system. The optimal relay cooperation of the benefit function and the adaptive adjustment mechanism of the system parameters obtain an optimized compromise between performance and energy consumption

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  • Adaptive cooperative spectrum sensing method and system based on optimal relay
  • Adaptive cooperative spectrum sensing method and system based on optimal relay
  • Adaptive cooperative spectrum sensing method and system based on optimal relay

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Embodiment Construction

[0033] Such as figure 1 As shown, the present invention provides an adaptive cooperative spectrum sensing based on optimal relay, and the system includes: a primary user, a cognitive user, a fusion center, and an auxiliary controller;

[0034] The primary user (Primary User, PU) of the present invention is an authorized user in the cognitive radio system sensing frequency band, that is, a sensing object, and has a certain wireless transceiver function in the authorized frequency band;

[0035]The cognitive user (Secondary User, SU) described in the present invention is an independent node that senses the authorized frequency in the cognitive radio system, that is, a specific node that implements perception, and has wireless transmission and reception functions in a specific frequency band;

[0036] The fusion center (Fusion Center, FC) of the present invention is a device in the cognitive radio system that receives the local perception data of cognitive nodes, has wireless tra...

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Abstract

The invention discloses an adaptive cooperative spectrum sensing method and system based on an optimal relay, and the method takes both sensing performance and sensing energy consumption into consideration. The working process of the system is divided into: independent perception, each cognitive user independently receives the main user signal, and judges whether relay assistance is needed according to the opportunity relay threshold; relay selection, non-relay users select the most Optimal relay, and cooperate to make local judgments; transmission and fusion, qualified cognitive users transmit local judgment results to the fusion center, and the fusion center judges the global results; feedback phase, feedback corresponding information to the control system according to the overall perception situation of the current round of the system Center, and adjust the system parameters accordingly.

Description

technical field [0001] The invention relates to an adaptive cooperative spectrum sensing method and system based on an optimal relay, and belongs to the technical field of computer wireless communication. Background technique [0002] Computer wireless communication and personal communication have developed rapidly in the past few decades, and various system structures, protocol standards and network architectures have emerged in an endless stream. With the rapid growth of wireless communication services, the contradiction between the increasing spectrum demand and limited spectrum resources has become one of the main bottlenecks restricting the development of wireless communication. In addition to the allocation of very few ISM open frequency bands, most of the current frequency use policies in the world adopt a license system, that is, authorized users use the specified frequency bands, and non-authorized users are not allowed to use them. And studies have shown that the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/10H04W48/20H04W52/02
CPCH04W16/10H04W16/14H04W48/20H04W52/0209H04W88/04H04W72/542Y02D30/70
Inventor 张学军鲁友严金童田峰成谢锋
Owner NANJING UNIV OF POSTS & TELECOMM
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