Dynamic Programming Based Power Control Algorithm with Primary User QoS Guarantee for Cognitive Radio Networks

To maximize the average rate in a long- term scope while guarantee primary user＇s QoS demand is a new key issue in cognitive radio systems. A dynamic programming based power control algorithm with the con- sideration of primary user＇s QoS by a rate loss constraint criterion is proposed in this paper...

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Bibliographic Details
Published in:电子学报：英文版 2013-04, Vol.22 (2), p.353-358
Main Author: LIANG Hui ZHAO Xiaohui
Format: Article
Language:English
Subjects:
QoS保证
功率控制算法
动态规划
平均增长率
无线电系统
无线电网络
用户
马尔可夫链模型
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Summary:To maximize the average rate in a long- term scope while guarantee primary user＇s QoS demand is a new key issue in cognitive radio systems. A dynamic programming based power control algorithm with the con- sideration of primary user＇s QoS by a rate loss constraint criterion is proposed in this paper. In the proposed al- gorithm, the occupancy for each subcarrier by primary users is modeled as a discrete-time Markov chain. And the concept of rate loss constraint is defined which is used to guarantee primary user＇s desired rate. Then the dy- namic programming framework with rate loss constraint of this problem is formulated, which is a function of the primary user occupancy state, the system channel gains and the remaining power budgets for the cognitive radio transmitters. At last, we give a solution for the problem. Simulation results show that the proposed algorithm can obtain a maximum average data rate over a finite time horizon and effectively guarantee primary users＇ QoS.
ISSN:1022-4653