摘要
协作中继传输是无中心节点的无线网络中的重要传输方式.在中继传输中应用数字喷泉码,能降低反馈信息的传输量,并在多个中继节点的情况下明显提高前向传输效率.提出了能量累积方式和信息累积方式两种喷泉中继传输方案,并对源节点至中继节点、中继节点至目的节点的传输性能进行了理论分析和仿真.能量累积方式在降低节点传输功耗上更为有效,而信息累积方式则能明显降低传输时间,并能适应中继节点数量和转发能力的变化,充分利用其转发能力.理论分析和仿真的结果表明,喷泉中继传输的性能明显优于普通中继传输的性能.
Cooperative relay transmission is an important transmission scheme in the decentralized wireless network.The use of digital fountain codes in cooperative relay transmission can decrease the amount of feedback information,and greatly improve the efficiency of forward transmission in the case there are multi relay nodes.Two relay transmission techniques using fountain codes—energy accumulation and information accumulation,are proposed,and the transmission performance is analyzed.The energy accumulation scheme is more effective to decline the power consumption;while the information accumulation scheme can obviously shorten transmission time.At the same time,the latter adapts well to the changes of the number and transmission capabilities of relay nodes so that it can make full use of their transmission capabilities.The results of theory analyzing and simulation show that the performance of fountain relay transmission is much better than that of normal relay transmission.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2010年第1期228-233,共6页
Acta Electronica Sinica
基金
国家自然科学基金(No.60872037)
重庆市自然科学基金(No.2008BB2411)
重庆市教育委员会科学技术研究(No.KJ080508)
关键词
协作中继
中继传输
数字喷泉码
能量累积
信息累积
cooperative relay relay transmission digital fountain codes energy accumulation information accumulation
