张培颖
1, 王超
2, 吴胜
1
（1. 中国石油大学（华东），中国 青岛 266580；2. 北京邮电大学，中国 北京 100876）
摘要：对具有代表性的延迟/中断容忍网络（DTN）的路由算法以及低轨（LEO）卫星网络路由算法进行了全面系统的回顾，并总结现有算法主要的技术特点及局限性。为应对LEO卫星网络通信中的长时延、星地链路频繁中断和卫星存储能力受限等情况，提出一种基于DTN的LEO卫星网络路由技术。该技术能够充分利用LEO卫星的管理能力，在出现通信链路中断、链路时延过高等状况时，动态调整路由策略。这使LEO卫星网络一定的自主性、拥塞控制与抗毁能力，从而保证数据信息的正常通信。
关键词：延迟/中断容忍网络；低轨卫星网络；自主路由技术；拥塞控制；抗毁能力
DTN-Assisted Low Orbit Satellite Network Routing Technology
ZHANG Peiying1, WANG Chao2, WU Sheng1
(1. China University of Petroleum (East China), Qingdao 266580, China; 2. Beijing University of Posts and Telecommunications, Beijing 100876, China)
Abstract: The routing algorithms of Delay/Disruption Tolerant Network (DTN) and Low Earth Orbit satellite network (LEO) are reviewed, and the main technical characteristics and their limitations of existing algorithms are analyzed. To cope with the long latency of the LEO satellite network communication, frequent interruption of satellite ground link, and limited satellite storage capacity, a routing technology based on DTN for the LEO satellite network is proposed. This technology makes full use of the management ability of LEO satellite to dynamically adjust the routing strategy in case of communication link interruption and link delay of too high condition, which give LEO satellite network certain autonomy, congestion control, and destruction resistance, so as to ensure the normal communication of data information.
Keywords: Delay/Disruption Tolerant Network; Low Earth Orbit satellite network; autonomous routing technology; congestion control; destruction resistance
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