Dynamic cognitive network resource allocating method

Abstract

The invention discloses a dynamic cognitive network resource allocating method, and belongs to the technical field of wireless communication. The occupied situation of a master user authorization frequency band is predicted based on master user historical information and service characteristics, a cognitive base station carries out subordinate user frequency spectrum and power joint optimization allocation according to the frequency spectrum prediction information and subordinate user service requirement information, and therefore maximization of the subordinate user joint energy efficiency and minimization of the number of switching times are achieved. According to the method, the occupied state of the cognitive network master user frequency band, the subordinate user service requirement and switching cost caused by frequency band switching are comprehensively taken into consideration, the joint resource allocation is carried out based on a network energy efficiency maximization criterion, and the subordinate user joint energy optimization is achieved while the subordinate user service requirement is guaranteed and the performance drop caused by switching is reduced.

Description

Technical field [0001] The present invention belongs to the field of wireless communication technology, and relates to a dynamic cognitive network resource allocation method. Background technique [0002] With the rapid development of wireless communication technology and the continuous growth of wireless application requirements, various communication applications have an increasing demand for wireless spectrum. The traditional fixed spectrum allocation method has led to fierce competition in some frequency bands and a serious shortage of spectrum resources. At the same time, a large amount of allocated spectrum in some frequency bands is not fully used, resulting in low spectrum utilization. In order to effectively improve the utilization rate of spectrum resources and alleviate the problem of spectrum resource scarcity, cognitive radio technology using dynamic spectrum access mechanism has received extensive attention in recent years. [0003] The cognitive radio system adopts ...

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Problems solved by technology

[0006] The above method only considers the secondary user channel and power allocation problem under the condition that the authorized channel information of the primary user is determined, and does not consider the randomness of the primary user's service demand in the actual application scenario, as well as the resulting differences in the primary user's arrival time and service duration of each channel. Due to the deterministic problem, the secondary user may be forced to suspend transmission or switch to other spectrums due to the arrival of the primary user, resulting in severe limitations in the continuity and comprehensive performance of secondary user service transmission

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