DTN中基于传染路由的节点拥塞控制策略  

Congestion Control Strategy Based on Epidemic Routing for node in DTN

作　　者：赵玲[1] 刘占军[1] 李云[1] 刘期烈[1] 

机构地区：[1]重庆邮电大学无线信息网络研究中心,重庆400065

出　　处：《通信技术》2009年第2期136-137,140,共3页Communications Technology

基　　金：国家自然科学基金项目(60702055):间断连接无线互联网络:通信体系及其关键技术研究;教育部新世纪优秀人才支持计划(NCET);重庆市教委项目(KJ070521);重庆邮电大学青年基金项目(A2008-30)。

摘　　要：DTN中信息传输采用存储转发模式,当节点缓存受限,在该网络中采用传染路由则节点处易发生拥塞。针对此问题提出一种基于传染路由的拥塞控制策略:当节点缓存完全占用又需存储新分组时,遍历缓存,找出转发次数大于等于N次的分组将其删除;若缓存中没有这样的分组,则删除最后一个存入的分组,缓解拥塞,有效提高了网络各性能。In Delay Tolerant Network（DTN）, the store-and-forward mode is used for information transmission. When the buffer of the node is limited, the congestion at node is quite frequent while epidemic Routing is used in DTN. In order to solve the problem, a congestion control strategy based on Epidemic Routing. When the buffer of node was fully occupied and node needs store new messages, the node lookups per message in its buffer, then finds out the messages which number of forwarding are over N and deletes them. There are no messages which number of forwarding are over N, node deletes the last one. The simulation results testify the improvement.

关 键 词：DTN 传染路由 拥塞控制 转发次数 

分 类 号：TP399[自动化与计算机技术—计算机应用技术]