Cross-layer Joint Relay Selection and Power Allocation Scheme for Cooperative Relaying System
A novel cross-layer joint relay selection and power allocation(CL-JRSPA)scheme over physical layer and data-link layer is proposed for cooperative relaying system in this paper.Our goal is finding the optimal relay selection and power allocation scheme to maximize system achievable rate when satisfying total transmit power constraint in physical layer and statistical delay quality-of-service(QoS)demand in data-link layer.Using the concept of effective capacity(EC),our goal can be formulated into an optimal joint relay selection and power allocation(JRSPA)problem to maximize the EC when satisfying total transmit power limitation.We first solving optimal power allocation(PA)problem with Lagrange multiplier approach,and then solving optimal relay selection(RS)problem.Simulation results demonstrate that CL-JRSPA scheme gets larger EC than other schemes when satisfying delay QoS demand.In addition,the proposed CL-JRSPA scheme achieves the maximal EC when relay located approximately halfway between source and destination,and EC becomes smaller when the QoS exponent becomes larger.
Hui Zhi Mengmeng He Feiyue Wang Ziju Huang
Key Lab of Computing Intelligent and Signal Processing(Ministry of Education),Anhui University,Hefei,China;College of Electronics and Information Engineering,Anhui University,Hefei,China
国际会议
上海
英文
1-8
2017-12-28（万方平台首次上网日期，不代表论文的发表时间）