Optimization scheme with pre-processing for cooperative relay multicast networks in cellular system  

作　　者：WANG Cheng-jin LI Xi ZHANG Lin JI Hong 

机构地区：[1]Key Laboratory Of Universal Wireless Communication, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2011年第3期16-21,共6页中国邮电高校学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (60832009);Natural Science Foundation of Beijing (4102044);Innovative Project for Young Researchers in Central Higher Education Institutions (2009RC0119);the New Generation of Broadband Wireless Mobile Communication Networks of Major Projects of National Science and Technology(2009ZX03003-003-01)

摘　　要：For cooperative relay multicast networks, the general cross-layer optimization approaches converge to the global optimal value slowly because of the large quantity of relay terminals. However, the mobility of relay terminals requires quick converging optimization strategies to refresh the relay links frequently. Based on the capacity analysis of multiple relay channels, an improved cross-layer optimization scheme is proposed to resolve this problem, in which the bound of the relay selecting region is determined as a pre-processing. Utilizing the primal-dual algorithm, a cross-layer framework with pre-processing optimizes both the relay terminal selection and power allocation with quick convergence. The simulation results prove the effectiveness of the proposed algorithm.For cooperative relay multicast networks, the general cross-layer optimization approaches converge to the global optimal value slowly because of the large quantity of relay terminals. However, the mobility of relay terminals requires quick converging optimization strategies to refresh the relay links frequently. Based on the capacity analysis of multiple relay channels, an improved cross-layer optimization scheme is proposed to resolve this problem, in which the bound of the relay selecting region is determined as a pre-processing. Utilizing the primal-dual algorithm, a cross-layer framework with pre-processing optimizes both the relay terminal selection and power allocation with quick convergence. The simulation results prove the effectiveness of the proposed algorithm.

关 键 词：cooperative relay cross-layer optimization PRE-PROCESSING MULTICAST 

分 类 号：TN929.52[电子电信—通信与信息系统] TP393[电子电信—信息与通信工程]