A routing protocol for hierarchical LEO/MEO satellite IP networks
A routing protocol for hierarchical LEO/MEO satellite IP networks
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DOI：
10.1007/s11276-005-1772-1
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发表时间：
2005-07-01
影响因子：
3
通讯作者：
Ekici, E
中科院分区：
文献类型：
--
作者：
Chen, C;Ekici, E
基于internet的应用的快速增长推动宽带卫星网络承载IP流量。在先前提出的卫星网络无连接路由方案中，用于计算路径的度量并不能反映数据包可能经历的总延迟。本文提出了一种新的卫星分组路由协议（SGRP）。在每个快照周期，SGRP根据中地球轨道（MEO）卫星的足迹面积将低地球轨道（LEO）卫星分组。MEO卫星管理者根据LEO卫星发送的时延报告，计算出LEO成员的最小时延路径。由于信令业务与数据业务在物理上是分离的，链路拥塞不会影响延迟报告和路由表计算的响应性。详细介绍了处理链路拥塞和卫星故障的快照和组形成方法以及快速反应机制。通过仿真和分析对SGRP的性能进行了评价。
The rapid growth of Internet-based applications pushes broadband satellite networks to carry on IP traffic. In previously proposed connectionless routing schemes in satellite networks, the metrics used to calculate the paths do not reflect the total delay a packet may experience. In this paper, a new Satellite Grouping and Routing Protocol (SGRP) is developed. In each snapshot period, SGRP divides Low Earth Orbit (LEO) satellites into groups according to the footprint area of the Medium Earth Orbit (MEO) satellites. Based on the delay reports sent by LEO satellites, MEO satellite managers compute the minimum-delay paths for their LEO members. Since the signaling traffic is physically separated from the data traffic, link congestion does not affect the responsiveness of delay reporting and routing table calculation. The snapshot and group formation methods as well as fast reacting mechanisms to address link congestion and satellite failures are described in detail. The performance of SGRP is evaluated through simulations and analysis.