多速率分层光组播的波长带宽优化分配  

Optimization of Wavelength Bandwidth Allocation in Multi-Rate Layered Multicast

作　　者：刘焕淋[1] 秦亮[1] 谢芸徽[1] 

机构地区：[1]重庆邮电大学重庆市光纤通信技术重点实验室,重庆400065

出　　处：《北京邮电大学学报》2013年第2期60-63,69,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家重点基础研究发展计划项目(2012CB315803);国家自然科学基金项目(61275077;61071117)

摘　　要：光网络目的节点的异构性使组播业务的吞吐量和资源利用率都很低,为此提出了一种以最大化网络总吞吐量为目标的光组播网络最佳分层组播速率确定方法.采用启发式算法确定每层实现最大组播吞吐量的最佳层速率值,计算组播的链路共享度,对共享度高的链路采用网络编码方法传输数据包,节约波长带宽分配.该方法同时优化了分层组播速率和波长资源的分配,解决了异构网络多速率的吞吐量最大化问题,显著提高了光网络的波长带宽资源利用率.In optical network, heterogeneous destination nodes make throughput of multicast traffic de- crease and resource utilization decline. A method for determining optimal layered multicast rate is pro- posed to maximize the network throughput. Based on the heuristic algorithm, the optimal layer muhicast rate is optimized to maximize the network total throughput. Meanwhile, the link share degree is calculated for the muhicast tree link. In order to minimize the wavelength bandwidth consumption, the network cod- ing technology is put forward to transmit the packet for the high share degree link. The layered muhicast rate and wavelength bandwidth allocation are jointly optimized to resolve the throughput maximal problem for heterogeneous multi-rate network. Furthermore, the proposed method can improve the wavelength bandwidth utilization enormously.

关 键 词：光网络 分层组播 网络编码 吞吐量 波长利用率 

分 类 号：TN929.11[电子电信—通信与信息系统]