结合资源预留的分布式QoS组播路由算法

The Algorithm for Distributed QoS Multicast Routing with Resource Reservation

针对网络资源信息的动态变化对QoS组播路由算法的巨大影响,该文提出了一种与资源预留结合的分布式组播路由算法DQMTR。DQMTR通过在路径探索过程中进行资源预留克服网络信息变化对QoS路由算法的影响。DQMTR还通过记录预约资源的数量解决资源的过预约问题,并利用DiffServ体系下QoS路由算法的特点使算法能够适用于DiffServ网络。仿真实验表明,DQMTR提高了组成员加入的成功率,优化了平均路径代价值。

To eliminate the affect of the change of resource information on the QoS multicast routing, an algorithm for Distributed QoS Multicast Routing with Resource Reservation（DQMTR） is put forward in this paper. Using resource reservation in the process of path-detecting, DQMTR overcomes the issue. By noting the number of reserved resource, DQMTR resolves the issue of over-reservation. This paper considers the characteristic of differentiated services model to which DQMTR is adapted. The simulation reveals that the algorithm improves the success ratio, and optimizes the average path cost.