【摘要】 提出异构带宽约束的动态源组播路由(heterogeneous bandwidth-constrained dynamic source multicast rout-ing,HBMR).为了支持组成员的动态性和异质性,收集了组播树分布信息和组播树上节点的最大可接收能力信息.并设计了一个基于该信息的异构带宽约束的动态源组播路由算法.仿真实验结果表明,HBMR不但解决了异构带宽约束费用优化的动态组播路由问题,而且在路由成功率、路由消息开销和组播树占用的带宽资源等方面的性能都有综合提高.更多还原

【Abstract】 A new source based multicast routing with heterogeneous and dynamic receivers is proposed.Besides the general state information of the topology and the available bandwidth,two classes of group-specific state information such as the distribution of multicast tree and the highest receivable layer of on-tree nodes are also maintained at a router.Based on the above four classes of state information,the routing algorithm is designed to find a feasible tree branch satisfying a new member with its heterogeneous QoS requirement in terms of data layer and corresponding bandwidth.Compared with other related routing schemes,the routing performs better in such metrics as the routing control overhead,the routing success ratio and the bandwidth resources of the multicast tree.更多还原