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DOI:
Journal of Software:2004.15(6):908-914

基于混合应答机制的层次型可靠移动组播算法
孙利民,廖勇,吴志美
(中国科学院,软件研究所,北京,100080)
A Hierarchy Reliable Mobile Multicast Algorithm Based on Mixed Acknowledgement Mechanism
SUN Li-Min,LIAO Yong,WU Zhi-Mei
()
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Received:June 01, 2004    
> 中文摘要: 由于移动主机位置的不断改变引起组播树的频繁重构,已有的可靠组播算法已不适用于主机移动的无线网络环境.首先提出了前向网络签署的移动组播机制,然后在基于区域的层次型网络结构中,集成前向网络签署和远程签署,采用ACK和NAK相结合的应答机制,在子网局部范围内使用组播恢复机制和应答抑制机制,提出了一个新的支持主机移动的可靠移动组播算法.在重传延迟、重传开销、协议开销和服务中断时间这些方面的模拟结果和分析显示,该算法是一个高效的、可扩展的可靠移动组播算法.
Abstract:As mobile hosts dynamically change their locations, which makes the multicast transmission tree to be rebuilt frequently, the existing reliable multicast algorithms are unsuitable for mobile hosts in wireless IP networks. In this paper, a new basic mobile multicast mechanism called previous network subscription is proposed. Then, a new reliable multicast algorithm supporting mobile hosts is given. Based on hierarchical architecture, this algorithm integrates previous network subscription and remote subscription. An ACK and NAK mixed acknowledgement mechanism is adopted, the lost packets are retransmitted by multicasting, and the NAK suppression is used in the subnet. The analysis and simulation results show that the algorithm has a good performance in terms of retransmission delay, retransmission cost, multicast service disruption, and protocol cost.
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基金项目:Supported by the National Natural Science Foundation of China under Grant No 60272078(国家自然科学基金);the National High-Tech Research and Development Plan of China under Grant No.2001AA112051(国家高技术研究发展计划(863)) Supported by the National Natural Science Foundation of China under Grant No 60272078(国家自然科学基金);the National High-Tech Research and Development Plan of China under Grant No.2001AA112051(国家高技术研究发展计划(863))
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孙利民,廖勇,吴志美.基于混合应答机制的层次型可靠移动组播算法.软件学报,2004,15(6):908-914

SUN Li-Min,LIAO Yong,WU Zhi-Mei.A Hierarchy Reliable Mobile Multicast Algorithm Based on Mixed Acknowledgement Mechanism.Journal of Software,2004,15(6):908-914