Cooperative spectrum sensing method of cognitive radio network considering malicious nodes

Abstract

The invention discloses a cooperative spectrum sensing method of a cognitive radio network considering malicious nodes. The cooperative spectrum sensing method is characterized in that the nodes involved in cooperative sensing are subjected to cyclic spectrum sensing to obtain characteristics of spectrum resources of a master user; normally sensed nodes and maliciously sensed nodes report sensed information to a data fusion center through an orthorhombic common control channel; the data fusion center perform data fusion on the collected sensed information and calculate the false alarm probability of the false alarm probability according to the malicious attach pattern of the malicious nodes; a secondary user and the master user share the spectrum resources, build a optimizing model, determine the constraint conditions of the transmitting power and the sensing time, solve the built optimizing problem, and repeat the steps to make the obtained average value to be the sensed parameter of the spectrum sensing model. The cooperative spectrum sensing method is fast in calculation and strong in pertinence and universality, and can correctly select the optimizing sensing period and the signal transmitting power in the sensing environment with the malicious nodes.

Description

technical field [0001] The invention belongs to the technical field of cognitive radio networks, and in particular relates to a cognitive radio network cooperative spectrum sensing method considering malicious nodes. Background technique [0002] With the rapid development of wireless communication and service applications, the tension of spectrum resources has become increasingly prominent. In addition, the allocation of spectrum resources is a traditional "segmentation" static usage policy. The literature An integrated agent architecture for software defined radio borrows a measurement report from the US National Radio Network Research Testbed (NRNRT) project, which shows that under this spectrum allocation policy, the average spectrum utilization of the frequency band below 3GHz is only 5.2%. There is a huge waste of resources. How to improve spectrum utilization under the condition of limited spectrum resources, cognitive radio technology has become a key technology, wh...

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Problems solved by technology

[0015] The purpose of the embodiments of the present invention is to provide a cognitive radio network cooperative spectrum sensing method considering malicious nodes, aiming to solve the problem that the existing power allocation is based on single-point sensing, and the assumed sensing environment is often They are all relatively ideal, and basically do not take into account the security of the network, and cannot be well combined with the actual perception environment

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