Cognitive wireless communication system and MAC protocol implementation method for power system

Abstract

The invention provides a cognitive wireless communication system for an electric system, and a MAC protocol realization method for the electric system. The system includes a main base station, a cognitive base station, a spectrum negotiation terminal, an authorized user and a cognitive user; the main base station and the cognitive base station respectively manages the authorized user and the cognitive user; the main base station and the cognitive base station carry out information interaction; and the cognitive base station and the spectrum negotiation terminal carry out the information interaction. The MAC protocol realization method provides a more scientific spectrum resource allocation method on basis of urgency and fairness based, and also a multi-parameter frequency switching method on basis of a weighting. The cognitive wireless communication system of the invention reduces the spectrum sensing time and improves the sensing efficiency, so that the radio frequency utilization efficiency is increased; the communication anti-interference capacity of the electric wireless terminal is improved; the more scientific spectrum resource allocation is realized; the rational resource sharing is ensured; the more comprehensive and integrated frequency switching is achieved; the smooth transition of switching is ensured; and the switching performance impact is reduced.

Description

technical field [0001] The invention belongs to the technical field of power system communication, and in particular relates to a cognitive wireless communication system used in a power system and a MAC protocol implementation method. Background technique [0002] As one of the important supporting technologies for the development of smart grid, power communication technology is closely integrated with power grid technology to build an informatized, automated, and interactive smart grid to provide users with more comprehensive, safe, convenient, and comfortable services. As a supplement to wired communication, wireless communication is also an important part of power communication, and it also plays a role that cannot be ignored in the development of power grids. Frequency resources are one of the bottlenecks restricting the development of wireless communication. Due to the particularity of the power communication industry, this problem is more prominent: although power wire...

AI Technical Summary

Problems solved by technology

Frequency resources are one of the bottlenecks restricting the development of wireless communication. Due to the particularity of the power communication industry, this problem is more prominent: although power wireless communication has a dedicated wireless frequency band of 230MHz, the bandwidth is not wide, the number of frequency bands is limited, and generally They are all fixed allocations, and the utilization rate is not high; the bandwidth range of the leased frequency band is fixed, there are security problems, and the cost of renting is high; there are many users in the public free frequency band, the competition is fierce, and the probability of conflict is high; and in the power environment , the operation of power equipment has a great influence on the interference of radio frequency use

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