Distributed Power Control in Cooperative Cognitive Ad hoc Networks

被引：2
|
作者：
Feng, Wen-Jiang [1 ]
Jiang, Rong [1 ]
Liu, Guo-Ling [1 ]
机构：
[1] Chongqing Univ, Coll Commun Engn, Chongqing 400044, Peoples R China
来源：
INTERNATIONAL JOURNAL OF AUTOMATION AND COMPUTING | 2014年 / 11卷 / 04期
关键词：
Ad hoc network; cooperative communication; power control; cognitive system; convex optimization;
D O I：
10.1007/s11633-014-0807-4
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
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.
引用
收藏
页码：412 / 417
页数：6
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