摘要
针对全网广播路由导致系统利用率低的问题,结合卫星通信网络的周期性和准确预知等特点,在源路由算法(SRA)的基础上,引入方向性指导策略,提出了具有导向功能的源路由改进算法(i-SRA)。由于采用部分广播方式,仅向靠近目的节点的相邻卫星发送路由请求分组,降低了请求分组传输的盲目性。通过OPNET建模仿真,结果表明改进算法减少了路由负载开销,提高了资源利用率。
Due to a low system usage of a route method which broadcasting in whole satellite networks, an improved approach adopting the directional strategy to the source routing algorithm in LEO satellite network is proposed, because the change of LEO satellite network is deterministic and can be predicted quite accurately. The strategy with partial broadcast forwards request route packets to satellites near the destination and the blind delivery of packets is reduced. In addition, the performance of the improved routing algorithm is evaluated by the OPNET modeling and simulation. The result shows that routing load is decreased and the utilized coefficient is raised.
出处
《现代电子技术》
2009年第5期4-6,16,共4页
Modern Electronics Technique
基金
国家重点实验室基金资助项目(9140C5302010802)
国家重点实验室基金资助项目(9140C5305020706)
