无线自组织网络中流间网络编码机会发现方法的研究  

Method for discovering intra-session network coding opportunity in wireless ad hoc networks

作　　者：董超[1,2] 钱睿[2] 陈贵海[1] 王海[2] 

机构地区：[1]南京大学软件新技术国家重点实验室,江苏南京210093 [2]解放军理工大学通信工程学院,江苏南京210007

出　　处：《通信学报》2011年第10期92-98,106,共8页Journal on Communications

基　　金：国家重点基础研究发展计划("973"计划)基金资助项目(2009CB3020402);国家自然科学基金资助项目(61103224);江苏省自然科学基金资助项目(BK2011118)~~

摘　　要：编码机会对流间网络编码协议的性能具有重要影响,包括AODV在内的大多数距离向量路由协议仅知道针对某个目的节点的一跳邻居信息,无法有效地发现编码机会。针对该问题,从节点需要掌握的网络拓扑信息这一角度,提出了编码机会有效发现的条件并从充分性与必要性两方面进行了分析,然后基于AODV路由协议进行了实现,同时利用真实的网络实验与网络仿真对所提条件进行了验证。实验与仿真结果表明,所提条件是正确的,可以有效地提高无线自组织网络的性能。Coding opportunity is critical to the performance of intra-session network coding in ad hoc networks.However,coding opportunity can not be discovered effectively with most distance-vector routing protocols including AODV which only knows one-hop neighbor node information.From the aspect of how much network topology information needs to be known,the condition under which the coding opportunity can be discovered effectively was proposed and the sufficiency and necessity of the condition was analyzed.Also the condition was implemented based on AODV routing protocol and validated with the help of real experiment and simulation.The results show that the proposed condition is correct and can improve the performance of wireless ad hoc networks effectively.

关 键 词：网络编码 编码机会 网络拓扑 无线自组织网络 

分 类 号：TN393[电子电信—物理电子学]