A Robust Cooperative Spectrum Sensing Method Based on Reliable Evaluation Criteria

A standard, node-aware technology, applied in the field of cognitive radio, which can solve the problems of unreliable reported data, weak node shadow, and difficulty in obtaining prior information of honest nodes.

CN107623553BActive Publication Date: 2020-10-30PLA UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-10-30

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Abstract

The present invention proposes a reliable evaluation criterion-based robust cooperative spectrum sensing method. According to the method, channel access feedback and full-time slot sensing are introduced to establish a reliable evaluation standard; based on the evaluation standard, the idle probability and occupation probability of an authorized channel and the detection probability and false alarm probability of a sensing node are calculated according to data in first N time slots; and local judgment results reported by the sensing node at the current time slot are fused according to the above calculation results, so that global judgment is performed. The method of the invention has high robustness and can maintain good performance under a large number of malicious users.
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Description

technical field

[0001] The invention belongs to the field of cognitive radio in wireless communication technology, and in particular relates to a robust cooperative spectrum sensing method based on a reliable evaluation standard. Background technique

[0002] With the explosion of wireless devices, the problem of spectrum shortage has become more prominent. Among many solutions, cognitive radio is widely regarded as an effective means to improve spectrum utilization and solve spectrum shortage. Cognitive radio is an intelligent wireless communication system capable of sensing the environment, learning from it, and adaptively adjusting input parameters to adapt to changes. Spectrum sensing is the key technology for sensing the environment. Spectrum sensing is used to discover spectrum holes of licensed channels and sense the existence of licensed users on channels, so that sensing users can use spectrum holes in time without interfering with normal communication of licensed...

Examples

Embodiment

[0086] A specific embodiment of the present invention is described as follows, and the system simulation adopts Matlab software. The following embodiments examine the effectiveness of the evaluation criteria and defense strategies designed in the present invention for spectrum data tampering attacks.

[0087] This embodiment compares the performance of the proposed method of the present invention with the performance of other methods. Simulation results show that the proposed method is better than other methods in defense performance and detection level. In addition, the convergence of the estimated user performance is also analyzed.

[0088] This embodiment considers a two-layer heterogeneous network composed of macro base stations and micro cells. N u A user assists the SU to realize cooperative spectrum sensing, where N m user is malicious. The user's local performance is set to p fi =0.2,p di = 0.8, the value range of the attack probability is (0,1]. In addition, as...