TCP友好的分布式可靠组播协议的设计与实现*

在源特定组播(SSM)的基础上,提出了一个分布式可靠组播传输协议--SDRMP(SSM-based distributed reliable multicast protocol).该协议基于划分域和分布式数据存储的思想,在域内由各节点分级保证与直连下游节点间的可靠报文传输,在域间由各个域的主节点分布式保存数据报文,并且发送者的发送速率根据各个域主节点的反馈报文进行调整,避免网络拥塞.仿真实验结果表明,SDRMP能有效地保证组播数据传输的可靠性,并具有较好的可扩展性和TCP友好性.

Design and implementation of TCP friendly distributed reliable multicast protocol

Source specific multicast (SSM) can solve the access control problem, this transport mode can guarantee the security of multicasting in a certain extent. A new distributed multicast protocol for SSM named SDRMP was proposed. This protocol was based on the idea of domain and distributed data storage. The information taken by SSM join datagram determines which domain a receiver belongs to. Within the domain, a node guaranteed the reliability of the multicast transport with its direct lower node. Among the domain, the master node of every domain stored parts of the entire datagram. Simulation results show that SDRMP can guarantee the reliability of SSM multicast transport and it is TCP friendly because it can control the bandwidth occupancies of reliable multicast data stream through the feedback datagram.