DiffServ-aware OBGP——一种新的域间端到端光路创建机制

DiffServ-aware OBGP A new inter-domain end-to-end lightpath setup scheme

OBGP是一种分布式协议,通过在多域光网络中传递路由和信令信息,使网络边缘的客户能够建立,管理和控制自己的光路。通过扩展OBGP,提出了一种新的D iffServ-aware OBGP机制来解决目前仍然存在的一些问题,比如域的接入控制以及通过对客户请求进行区分来解决资源请求竞争问题。文章定义了对目前OBGP消息的基本扩展,以及在光路建立过程中提供区分服务所需要的其他扩展,并且详细描述了在该机制下的光路创建过程。仿真证明了新机制不仅能够根据客户请求较好地创建端到端的光路,同时在资源竞争的情况下高优先级别的客户有更高的成功率来创建所需的光路。

OBGP is a distributed protocol, which can provide an inter-domain routing/signaling solution and allow the edge network customer to establish and manage a lightpath through multi - heterogeneous domains. In this paper, we propose a new scheme called DiffServ-aware OBGP by extending the OBGP. It can resolve the open problems of customer access admission in domain and the conflicting resource requests by distinguishing the priority of customer requests. The paper depicts the basic extension requirements for current OBGP message and the end-to-end lightpath establishment process at length. The simulation shows that the new scheme can establish adaptive end-to-end lightpath according to the request of customer and the higher priority requests have more probability of establishing lightpath when resource competition happens.