Frequency spectrum sharing method based on reliable sensing of wireless sensor network

Abstract

The invention discloses a frequency spectrum sharing method based on reliable sensing of a wireless sensor network. Cognitive radio is assisted by guiding in the wireless sensor network, and proper sensor nodes are selected according to the distance of the sensor nodes and a fusion center to participate in sensing. A secondary user is firstly in communication with the sensor network, the sensor network monitors frequency spectrum holes available and potentially available for a primary user in real time, and information is effectively fed back to the secondary user. Current frequency spectrum resources capable of being used for being distributed are obtained by utilizing the reliable frequency spectrum sensing result, each germ representation in a quantum flora algorithm is adopted as a frequency spectrum distribution scheme, and quantum bit coding, measuring and updating are carried out on germs to distribute target frequency spectrums. The frequency spectrums can be effectively sensed through the method, the normal communication that a cognitive user and the primary user coexist in the same area and the primary user is not interfered is achieved, the utilization rate of wireless frequency bands which are currently put into operation is effectively improved, and network operating cost is lowered.

Description

Technical field [0001] The invention belongs to the cross-research field of radio and sensor networks, and particularly relates to a spectrum sharing method based on reliable perception of wireless sensor networks. Background technique [0002] Due to the ever-increasing demand for wireless communication services (especially high-end services), more and more frequency spectrums are planned for personal wireless communication services. Therefore, lower wireless communication spectrum utilization is a real and urgent problem to be solved. Currently, there are a large number of "spectrum holes" (unused spectrum resources) in the wireless frequency bands that are in operation. Research by the Federal Communication Commission (FCC) shows that the utilization rate of the allocated spectrum is generally 15%~ 85%. Generally speaking, the wireless spectrum is not fully utilized in some frequency bands, which is undoubtedly a great waste of increasingly scarce spectrum resources. Cognitiv...

AI Technical Summary

Problems solved by technology

However, the existing intelligent algorithms still fall into local optimum in the process of spectrum allocation, which affects the fairness of spectrum allocation results.

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