Joint relay selection and power allocation algorithm in two-way relay networks with proportional fair constraint  

作　　者：DING Yi LIU Yuan-an XIE Gang DENG Pan-liang LI Xing-zheng 

机构地区：[1]School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China [2]School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China [3]Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China [4]China Mobile Group Design Institute Co., Ltd, Beijing 100080, China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2011年第4期45-51,共7页中国邮电高校学报（英文版）

基　　金：supported by the Sino-Swedish IMT-Advanced Cooperation Project (2008DFA11780);the Canada-China Scientific and Technological Cooperation (2010DFA11320);the National Natural Science Foundation of China (60802033, 60873190);the Hi-Tech Research and Development Program of China (2008AA01Z211);the Fundamental Research Funds for the Central Universities (2009RC0308, G470209);the Important National Science and Technology Specific Projects (2010ZX03007-003-04,2010ZX03005-001-03)

摘　　要：In this paper, we consider the joint relay selection and power allocation problem for two-way relay systems with multiple relay nodes. Traditionally, relay selection schemes are primarily focused on selecting one relay node to maximize the transmission sum rate or minimize the outage probability. If so, it is possible to cause certain relay nodes overloaded. In addition, the joint relay selection and power allocation problem is a mixed integer program problem and prohibitive in terms of complexity. Therefore, we propose a novel low complexity joint relay selection and power allocation algorithm with proportional fair scheduling to get the load-balancing among potential relays. Simulation results turn out that, compared with round-robin schemes and max sum rate schemes, the proposed algorithm can achieve the tradeoff between system transmission sum rate and load-balancing.In this paper, we consider the joint relay selection and power allocation problem for two-way relay systems with multiple relay nodes. Traditionally, relay selection schemes are primarily focused on selecting one relay node to maximize the transmission sum rate or minimize the outage probability. If so, it is possible to cause certain relay nodes overloaded. In addition, the joint relay selection and power allocation problem is a mixed integer program problem and prohibitive in terms of complexity. Therefore, we propose a novel low complexity joint relay selection and power allocation algorithm with proportional fair scheduling to get the load-balancing among potential relays. Simulation results turn out that, compared with round-robin schemes and max sum rate schemes, the proposed algorithm can achieve the tradeoff between system transmission sum rate and load-balancing.

关 键 词：relay selection power allocation two-way relay network amplify-and-forward relay proportional fair scheduling 

分 类 号：TP360.3[自动化与计算机技术—计算机系统结构] TN914[自动化与计算机技术—计算机科学与技术]