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Multi-node cooperative interference and secure spectrum sensing method in spectrum sensing

A spectrum sensing and cooperative interference technology, applied in the field of spectrum sensing, can solve problems such as the performance degradation of anti-jamming methods, and achieve the effect of good sensing performance and improved reliability

Active Publication Date: 2016-12-21
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

In such a cooperative jamming mode, the performance of a large number of existing anti-jamming methods will be greatly reduced, especially the trust-based anti-jamming algorithm

Method used

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Embodiment Construction

[0032] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments.

[0033] According to the false alarm probability P of the current perception environment f and detection probability P d The value of , the perception environment is divided into 4 states, that is, the state set S={s i |i=0,1,2,3}, where s 1 means P d ≤0.5 and P f ≥0.5,s 2 means P d f d >0.5 and P f d >0.5 and P f >0.5. Interference mode a includes three ways: Silence does not interfere a 0 , SSDF modea 1 , PUEA and SSDF cooperation a 2 .

[0034] Set up two malicious users communicating with each other, PUEA node (PUEA interference mode) and SSDF node (SSDF interference mode), and the PUEA node can also perceive the status of the primary user PU, based on the local sensing results and the FC sent by the SSDF node The feedback result learns the current percepti...

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Abstract

The invention discloses a multi-node cooperative interference and secure spectrum sensing method in spectrum sensing. In the multi-node cooperative interference method, a current sensing environment and an interference target are learnt by nodes, an optimal interference strategy is selected, the execution of the interference strategy is monitored in real time and is adjusted in real time, and the cooperative interference of PUEA and SSDF is fully used to increase the interference success probability. Meanwhile, the invention further discloses a secure spectrum sensing method used in a PUEA and SSDF cooperative interference environment. Trusted SU and untrusted SU are distinguished by identity identification values, and based on a sensing result of the trusted SU to a previous sensing time slot of a PU signal, the identity identification value of the SU of the next sensing time slot is modulated in real time to determine the SU that can enter a merging state of FC. By adopting the secure spectrum sensing method disclosed by the invention, in a comprehensive and complex sensing environment where PUEA and SSDF coexist, the influence of the PUEA and SSDF can be reduced and even eliminated at the same time, so that the entire sensing network keeps better sensing performance.

Description

technical field [0001] The invention relates to spectrum sensing technology, in particular to a method for multi-node cooperative interference and safe spectrum sensing. Background technique [0002] In spectrum sensing, the existence of malicious users seriously affects the efficiency of cognitive radio systems. Such malicious attacks can be divided into two categories: perceived link interference, and cooperative perceived interference. In the study of perceptual link interference, the fake primary user attack (Primary User Emulation Attack, PUEA) is a typical interference method, which simulates the characteristics of the primary user (Primary User, PU) signal and sends a signal similar to the PU signal. signal to confuse nearby secondary users (Secondary User, SU). Cooperative sensing interference is represented by Spectrum Sensing Data Falsification (SSDF), which sends the falsified sensing results to the data fusion center (Fusion Center, FC). The existence of these...

Claims

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Application Information

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IPC IPC(8): H04B17/382
CPCH04B17/382H04L41/145H04L63/1441
Inventor 彭启航李杨
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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