Low-power multi-channel spectrum sensing method and system for cellular communication network

Abstract

The invention discloses a low-power-loss multi-channel spectrum sensing method and system facing a cellular communication network. The method comprises the steps that first, a channel management entity selects a shared spectrum which is divided into a plurality of channels; second, the channel management entity divides the channels into a plurality of channel clusters in a frequency domain, during spectrum sensing, an asynchronization silent period is used for channels in different channel clusters, a synchronization silent period is used for channels in the same channel cluster; third, during the silent period, a cognition user terminal completes corresponding spectrum sensing operation in a current cell according to control of a cognitive base station, sensing results are reported to the cognitive base station, the cognitive base station integrates the sensing results and reports the sensing results to the channel management entity; fourth, the channel management entity refreshes state information of all of the current channels in each cell according to the integrated sensing results and feeds the information back to the base station. The frequency of spectrum sensing by the system is reduced, and accordingly power loss is lowered.

Description

technical field [0001] The present invention relates to a cognitive radio network, in particular to a method and system for performing low-power multi-channel spectrum sensing in a cognitive radio-based cellular communication network. Background technique [0002] As the data transmission rate of wireless communication increases, the demand for spectrum resources continues to increase, and the fixed spectrum allocation policy leads to low utilization of certain frequency bands in terms of time and space. The purpose of Cognitive Radio (CR) is to re-use the idle spectrum in time and space through the perception of the current radio environment, so as to solve the problem of spectrum resource shortage and low spectrum resource utilization in the current wireless communication network. Research on how to opportunistically use idle spectrum for communication without affecting the normal communication of authorized users, so as to meet the business needs of cognitive users and im...

AI Technical Summary

Problems solved by technology

[0006] In the existing technical solution, when each channel is in the silent period, the CBS and CU in the network need to detect the channel, because a large amount of power consumption is generated during the detection, compared with the traditional wireless communication network, cognitive The power consumption of the radio network will be greatly increased, which not only increases the operating cost of the system, but also reduces the continuous working time of the CU

At the same time, when performing spectrum sensing on the channel, the actual situation of each cell is not considered to determine whether to perform corresponding spectrum sensing in the cell, so as to reduce the number of system detections and reduce energy consumption.

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