首页 | 本学科首页   官方微博 | 高级检索  
     检索      

延迟容忍网络中一种基于拥塞程度的端到端确认机制
引用本文:安莹,王建新.延迟容忍网络中一种基于拥塞程度的端到端确认机制[J].中南大学学报(自然科学版),2012,43(7):2613-2621.
作者姓名:安莹  王建新
作者单位:中南大学信息科学与工程学院,湖南长沙,410083
基金项目:国家自然科学基金资助项目,国家高技术研究发展计划(“863”计划)项目,国家自然科学基金创新群体科学基金资助项目
摘    要:端到端传输的可靠性是传输层的重要问题之一,但是由于网络连接的间歇性,延迟可容忍网络(DTN)往往缺乏稳定的端到端路径,这使得传统的端到端可靠性方法无法直接应用在这类网络之中。分析DTN中端到端可靠性机制的基本原理以及存在的主要问题,提出一种新的基于拥塞程度自适应的端到端确认机制,即APR(Active-Passive Receipt),采用主动反馈与被动反馈相结合的方式,根据网络的拥塞状态自适应地调整确认消息的传输方式,限制网络的总体开销,同时保证较合理的传播延时,以求达到较好的综合性能。模拟结果表明:该方法有效地平衡网络开销和延迟性能,并获得较高的消息到达率。

关 键 词:延迟可容忍网络  确认机制  网络拥塞  端到端可靠性

Congestion level based end-to-end acknowledgement mechanism in delay tolerant networks
AN Ying , WANG Jian-xin.Congestion level based end-to-end acknowledgement mechanism in delay tolerant networks[J].Journal of Central South University:Science and Technology,2012,43(7):2613-2621.
Authors:AN Ying  WANG Jian-xin
Institution:(School of Information Science and Engineering,Central South University,Changsha 410083,China)
Abstract:Transport layer end-to-end reliability is one important issue in delay tolerant networks(DTNs).Because of the intermittent connectivity,DTNs lack stable end-to-end paths.Thus traditional end-to-end reliability approaches cannot work well in DTNs.The principle of end-to-end acknowledgement and the existing main problems in DTNs are analyzed deeply,and a novel congestion level based end-to-end acknowledgement mechanism-active-passive receipt(APR) is proposed,which combines active manner with passive manner in order to limit the total overhead and guarantee a reasonable transmission delay,and ultimately achieve preferable combination property.Simulation results show that our approach effectively balances the network cost and delay,and achieves higher message delivery rate.
Keywords:delay tolerant networks(DTN)  acknowledgement mechanism  congestion  end-to-end reliability
本文献已被 CNKI 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号