A stream layered cooperative relay multicast scheme and capacity analysis in cellular systems  

作　　者：王成金 Si Pengbo Li Yi 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, P.R.China [2]School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, P.R.China）

出　　处：《High Technology Letters》2011年第4期339-343,共5页高技术通讯（英文版）

基　　金：Supported by the State Key Program of National Natural Science Foundation of China （No. 60832009）, Natural Science Foundation of Bcijing （No. 4102044）, Innovative Project for Young Researchers in Central Higher Education Institutions, China （No. 2009RC0119） and New Generation of Broadband Wireless Mobile Communication Networks of Major Projects of National Science and Technology （No.2009ZX03003-003-01）.

摘　　要：It is widely believed that cooperative relay technologies can improve the throughput of multicasting in mobile cellular networks significantly, however, the mobility of the relay terrninals may cause frequent relay link outage. This paper proposes a stream layered cooperative relay scheme to deal with this problem. In order to study the characteristics of layered relay channels in the scheme, the capacity region is determined based on a single and a multi relay abstract model with streams layering. Besides, to satisfy the cellular network scenario, the results are extended to a wireless Gaussian channel model. The analysis and simulation results show that the scheme guarantees the continuity of the multicast streams, and maintains the high bandwidth of relay channel, with a slight loss on system capacity.

关 键 词：cellular mobile system channel capacity cooperative relay stream layered multicast 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] O655.2[自动化与计算机技术—控制科学与工程]