基于优先级机制的卫星MPLS网络重路由策略

Rerouting Strategy of Priority-Based in Satellite MPLS Network

针对卫星之间传输时延大、误码率高和星上资源有限造成的重路由时延大和丢包率高的问题,提出了一种基于优先级机制的重路由策略,以最小干扰算法作为路由算法,将业务流划分成不同优先级,同时定义链路重复率,针对不同优先级业务选择不同类型的备份路径,从而保证卫星网络中业务流的Qo S。仿真结果表明,提出的优先级策略在时延、丢包率和重路由成功率方面优于传统的全局保护和局部保护方法,同时在算法复杂度上优于地面较新的基于回路的重路由机制,有效地提高了链路失效期间卫星网络的性能。

To ensure QoS of business in satellite network, a new rerouting strategy based on a mechanism of prior- ity is proposed, which adopts least interference algorithm as routing algorithm, divides business according to different priority, defines link repetition rate, and chooses different backup paths for the business of different priority. Simula- tion results show that the proposed strategy in this paper outperforms the traditional method of global protection and partial protection in delay, packet loss rate and rerouting success rate, excels the newer rerouting mechanism based on loop in terrestrial network on algor/thmic complexity and improves the performance of satellite networks during dis- abled links.