Cognitive radio network spectrum allocation method based on spectrum potential benefit

Abstract

The present invention discloses a cognitive radio network spectrum allocation method based on spectrum potential benefit. The method comprises a step of collecting spectrum available information and network interference information and carrying out initialization, a step of obtaining a network interference topology according to the available spectrum condition in a network and the interference condition between secondary users, a step of calculating a secondary user distribution priority tag, calculating the potential system benefit value of the spectrum and the <loss, benefit> value of each corresponding secondary user according to initialization information, and thus calculating each secondary user distribution priority tag value in a corresponding sub distribution process, a step of selecting a secondary user with a largest tag value according to the priority tag value of each secondary user and distributing a current avaible spectrum, a step of updating a topology structure, and ending a current sub distribution process when a <loss, benefit> set is empty. The method has the advantages that the possibly brought potential system benefit loss in the spectrum distribution process is effectively reduced, a better system benefit is obtained, and the spectral efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of wireless networks, and relates to a spectrum allocation method for a cognitive radio network based on spectrum potential benefits. Background technique [0002] Due to the possible existence of interference or sharing among secondary users, the sequence of spectrum allocation directly affects the final result of spectrum allocation. The traditional spectrum allocation algorithm, based on the greedy criterion, will preferentially select the node with the largest benefit value to allocate the frequency band, because there is co-channel interference between the current secondary user and other secondary users. Therefore, in the future allocation process, the frequency spectrum cannot be allocated to other secondary users. In the current allocation process, only the system benefit brought by the current allocation operation is considered, while the potential system benefit loss in the future allocation proce...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a cognitive radio network spectrum allocation method based on spectrum potential benefits, which solves the problem of low system benefits commonly found in traditional spectrum allocation algorithms based on graph coloring models

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