联合网络编码与HARQ的中继传输协议及跨层优化设计  

Design and Cross-Layer Optimization of Relay Transmission Protocols Based on Network Coding and HARQ

作　　者：唐伦[1] 严靖琳[1] 陈前斌[1] 

机构地区：[1]重庆邮电大学移动通信技术重点实验室,重庆400065

出　　处：《北京邮电大学学报》2012年第3期34-37,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：国家科技重大专项项目(2011ZX03003-003-02);国家自然科学基金项目(60972070,61171111);重庆市自然科学基金项目(CSTC2009BA2090);重庆市教委项目(KJ100514);重庆邮电大学博士启动基金项目(A2011-2);重庆邮电大学自然科学基金项目(A2011-10)

摘　　要：为了进一步提高中继系统的可靠性和频谱效率,提出了联合固定网络编码与混合自动重传请求(DNC-HARQ)和联合随机网络编码与混合自动重传请求(ONC-HARQ)2种传输协议,分析了这两种传输协议的系统中断概率和频谱效率.以最大化系统频谱效率为优化目标进行跨层优化设计,并利用迭代算法求解.仿真结果表明,DNC-HARQ和ONC-HARQ传输协议比只采用网络编码的传输协议具有更高的系统可靠性,比仅采用HARQ的传输协议具有更高的频谱效率;所提出的基于最大化频谱效率的跨层优化算法能有效地最大化系统频谱效率.To improve the spectrum efficiency and reliability of relay system, two transmission protocols combined network coding and hybrid automatic repeat request （HARQ） are proposed, the HARQ proto- col is based on determination network coding（DNC-HARQ） ,and the HARQ protocol is based on oppor- tunity network coding（ONC-HARQ）. The performance of outage probability of system and the spectrum efficiency of these two protocols are analyzed. Furthermore, an optimize problem is elicited to maximize the spectrum efficiency of system. As the optimize problem is non-convex, an iterative algorithm is de- signed to solve it. Simulations confirm that the two protocols presented is with higher reliability than the protocol with network coding, more spectrum efficiency of systems is obtained than the protocol with HARQ. Simulation shows the iterative algorithm designed can effectively maximize the spectrum efficiency of system.

关 键 词：网络编码 混合自动重传请求协议 中继 跨层设计 

分 类 号：TN911[电子电信—通信与信息系统]