机会式网络编码的用户协作  

An Opportunistic Network Coding Approach to User Cooperation

作　　者：李世唐[1,2] 郑宝玉[1] 

机构地区：[1]南京邮电大学信号处理与传输研究院,江苏南京210003 [2]福建师范大学网络安全与密码技术重点实验室,福建福州350007

出　　处：《南京邮电大学学报（自然科学版）》2010年第2期27-30,35,共5页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(60972039);江苏省自然科学基金重大项目(BK2007729);江苏省高校自然科学基金重大项目(06KJ510001)资助项目

摘　　要：在两用户相互协作向基站传送数据的无线通信环境下,研究了基于机会式网络编码的协作策略:发送数据的用户节点把正确接收到的伙伴信息与自己将要发送的原始信息进行异或相加后再编码(或把两组信息先编码后再异或相加),然后将所得数据再发送出去。在假设所有的信道都存在衰落现象下,给出了传统的协作传输和机会式网络编码的协作传输策略下系统中断概率公式。仿真结果说明,相对于非协作传输与传统的协作传输,机会式网络编码协作策略具有较好的性能。This paper investigates the strategy of user cooperation based on opportunistic network coding in the wireless communication context, in which two users cooperatively send data to the base station. After XORing his own data to be sent with correctly received partner＇s data, the user encodes the resulting data and sends it out. The equation of system outage probability is derived for both traditional cooperation approach and the opportunistic network coding cooperation approach under the assumption that all channels exhibit fading phenomenon. Results of numerical analysis indicate that the opportunistic network coding cooperation is with better performance than traditional user cooperation and non-cooperation approach.

关 键 词：网络编码 用户协作 存储转发 系统中断概率 

分 类 号：TN911.2[电子电信—通信与信息系统]