基于节点异构性的应用层组播算法

APPLICATION LAYER MULTICAST ALGORITHM BASED ON NODE HETEROGENEOUS

为降低组播树的维护开销、改善组播树的负载平衡、提高组播树的性能,给出一种基于节点异构性的应用层组播算法。与已有的应用层组播算法相比,综合考虑了节点的异构性(动态计算节点异构性,综合考虑节点的网络转发能力和计算能力来),提出了全新的组播树构建策略并通过黄牌节点的数量来及时调整组播树。仿真结果表明,该算法大大降低了端到端的延迟和平均链路伸展长度,提高了系统的稳定性。

To reduce the muhicast tree maintenance cost, improve its load balance and performance, this paper proposes an application layer multicast algorithm based on node heterogeneous. Compared with existing application layer muhicast algorithms, it comprehensively considers node heterogeneous （ dynamically calculates node heterogeneous, comprehensively considers the node＇s network forwarding capacity and computing power） ; then presents a new muhicast tree construction strategy and timely adjust the muhicast tree according to the number of yellow nodes. Simulation results show that the algorithm greatly shortens the delay between peers as well as the average link stretch length; therefore the system stability is improved.