一种基于OBGP协议的光网络域间路由的新型机制

本文提出一种采用光边界网关协议(OBGP)实现WDM光格状网的域间路由的新型机制;该机制基于最小跳选择策略建立最优化路径的思想,同时引进"迂回路由"策略和"并行信令"方式,实现了动态、分布式的光通道确立过程.在OPNet平台上针对两种网络拓扑进行仿真实验,结果表明:该机制能够在网络繁忙时期降低阻塞率,提高网络性能;同时发现:网络规模、单信道波长数以及网络负载等网络参数对于网络性能具有一定的影响.

An OBGP-Based Mechanism for Inter-Domain Routing in Optical Networks

The authors proposed a novel mechanism based on Optical Border Gateway Protocol (OBGP) that implements inter-domain routing in optical mesh networks.Based on an idea of minimum-hop optimal path and a bypass routing during the request course of lightpath setup phase,they achieved the procedure of dynamic and distribution lightpath establishment efficiently in optical networks,which results in a lower blocking probability than before.They also made resource reservation and configured hardware with a "parallel signaling" mode,which can reduce the end-to-end delay.An experiment of this mechanism using optiman network simulation tools has been presented,which has shown that our study can decrease blocking probability on condition of heavy traffics and make network performance better.It also demonstrates that the three factors,such as network scales,number of wavelengths and traffic loads,have influenced on the network performance.The analysis indicates that a value related to the change of blocking probability approximates the product of end-to-end delay and network scales.