基于资源影响力的组播快速重构机制  

Fast multicast reconfigurable scheme based on resource effect degree

作　　者：莫涵[1] 兰巨龙[1] 贺炜[1] 

机构地区：[1]国家数字交换系统工程技术研究中心,河南郑州450002

出　　处：《计算机工程与设计》2013年第12期4099-4103,4161,共6页Computer Engineering and Design

基　　金：国家科技支撑计划基金项目(2012BAH02B01;2012BAH02B03);国家863高技术研究发展计划基金项目(2011AA01A103;2011AA01A101)

摘　　要：在对现有组播故障恢复技术研究的基础上,提出了一种基于资源影响力的组播快速重构机制RED-MRS。REDMRS通过定义资源影响力,刻画了网络中资源的重要程度,结合资源影响力,计算具有容错能力的备份组播树,能够减少备份组播树故障可能性,并均衡资源利用;为提高构建成功率,RED-MRS允许备份组播树与原始组播树相交。当网络出现故障时,RED-MRS通过重构激活故障源子节点的备份路径,实现快速恢复。仿真实验结果表明,RED-MRS在恢复时间、组播树代价以及资源利用方面具有明显优势。Through researching of existing multicast recovery schemes, a fast multicast reconfigurable scheme based on resource effect degree named RED-MRS is proposed. RED-MRS defines resource effect degree to characterize the importance of network resources. Based on resource effect degree, RED-MRS calculates fault-tolerant backup multicast tree to reduce the failure probability of backup tree and balance resource utilization. To increase the rate of building backup tree, RED-MRS allows backup tree to use some node or links belong to original multicast tree. The results show that RED-MRS has an advantage in terms of the rate of building recovery time and cost.

关 键 词：组播 故障恢复 资源影响力 相交备份树 重构 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]