一种移动环境中的可靠组播协议

A Reliable Multicast Transport Protocol for Mobile Environment

提出一种用于移动蜂窝网的自适应可靠组播算法.在该算法中,邻近的基站之间通过一个控制组播组交换信息以控制缓存数据量的大小.每个控制组播组包含的基站数量根据网络结构和主机的移动速度来调整.多个基站的合作保证移动主机能够可靠地接收组播数据,同时又能节省基站缓冲器的容量.仿真表明该算法能够以较少缓存达到快速恢复丢失数据的要求,是一种有效的可靠移动组播传输协议.

An adaptive algorithm for reliable multicast in mobile cellular networks was proposed, with which, the information between the base stations and their neighborhoods was exchanged through a dedicated multicast group to control the amount of packets stored in their buffers. The number of base stations in multicast group for control was adjusted according to structure of the mobile network and the moving velocity of mobile hosts. The cooperation of neighborhoods base stations ensures that data packets could be reliably received by the mobile hosts in a multicast group. In the meantime, buffer capacities of base stations were saved. Simulation shows that the algorithm recovers the lost packets quickly with smaller buffers in the base stations. It concludes itself an effective mobile reliable multicast protocol.