支持延时约束的覆盖多播路由协议的研究

Delay constraint supported overlay multicast routing protocol

研究有度和延时约束的覆盖多播路由问题,提出了一个新的覆盖多播路由协议-延时受限的树协议(DBTP)。该协议采用分布式和树优先的策略,使多播组成员之间能自组织地构建一棵基于源的覆盖多播树。DBTP协议采用了一种新的启发式局部优化算法,通过调节启发因子,能灵活地在延时和代价之间进行折衷。仿真实验表明,无论在静态还是动态节点模型下,选择适当的启发参数,DBTP都能获得较高的节点接纳率。

The degree and delay constrained routing problem in overlay multicast was studied, and a new overlay multicast routing protocol called delay bounded tree protocol （DBTP） was proposed. Adopted distributed and tree-first strategies, the protocol enabled members of a multicast group to self-organize into a sourced-based overlay multicast tree. DBTP used a new heuristic local optimum algorithm, which could make trade-off between delay and cost of the multicast tree by adjusting a heuristic parameter. The simulation result shows that DBTP can both achieve the admission rate of members highly under whether static or dynamic node model through choosing a proper value of the heuristic parameter.