Distributed Power Control in Cooperative Cognitive Ad hoc Networks

作     者：Wen-Jiang Feng Rong Jiang Guo-Ling Liu 

作者机构：College of Communication Engineering Chongqing University 

出 版 物：《International Journal of Automation and computing》 (国际自动化与计算杂志（英文版）)

年 卷 期：2014年第11卷第4期

页      面：412-417页

核心收录：

学科分类：0711[理学-系统科学] 07[理学] 08[工学] 081101[工学-控制理论与控制工程] 0811[工学-控制科学与工程] 071102[理学-系统分析与集成] 081103[工学-系统工程] 

基　　金：supported by Natural Science Foundation ofChongqing(No.CSTC2009BA2064) Fundamental Research Fundsfor Central Universities(No.CDJZR12160004) PostgraduateScience and Technology Innovation Fund(No.CDJXS12161109) 

主　　题：Ad hoc network cooperative communication power control cognitive system convex optimization 

摘      要：In this paper, a relay selection strategy and distributed power control algorithm are proposed for the underlay spectrum sharing mode based cooperative cognitive ad hoc network with energy-limited users. The study aims to minimize the total power consumption of cooperative cognitive ad hoc network while ensuring the quality of service(QoS) requirement of cognitive user and keeping the interference to primary user below interference tolerance. The power control problem is transformed into a convex optimization problem. Based on Lagrange dual decomposition theory, a gradient iterative algorithm is constructed to search for the optimal solution and complete distributed power optimization. Simulation results show that the algorithm converges fast and reduces transmit power of cognitive users effectively while guaranteeing the QoS requirement.