| LEO/MEO卫星通信系统ISL网络路由及切换性能研究 |
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| 引用本文： | 李晖,顾学迈.LEO/MEO卫星通信系统ISL网络路由及切换性能研究[J].系统工程与电子技术,2005,27(7):1145-1153. |
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| 作者姓名： | 李晖 顾学迈 |
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| 作者单位： | 哈尔滨工业大学通信技术研究所,黑龙江,哈尔滨,150001 |
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| 基金项目： | 国家“863”高技术计划资助课题(863-2-5-2.1) |
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| 摘 要： | 为了研究高度不同的卫星通信网络的路由和切换性能,采用Walkerdelta型星座构成两种非静止轨道卫星通信系统,分析和比较了LEO和MEO卫星通信网络构成特点和星间链路的俯仰角、方位角和星间链路长度变化。采用不同的路由策略以满足不同服务质量的要求,分析该策略下的卫星网络性能。设计了一种混合路由策略,综合考虑时延、时延抖动、切换和通信中断4项指标,进而比较不同高度的两种卫星网络应用不同路由策略时的性能。结果表明,混合路由策略上述服务质量的综合指标最优,该策略能够为各种用户提供不同的服务质量,提高卫星通信系统有效性和可靠性。
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| 关 键 词： | 卫星通信网络 非静止轨道 星间链路 服务质量 路由 切换 |
| 文章编号： | 1001-506X(2005)07-1145-09 |
| 修稿时间： | 2004年6月8日 |
Research on routing and handoff performance for ISL networks in LEO/MEO satellite communication systems |
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| LI Hui,GU Xue-mai.Research on routing and handoff performance for ISL networks in LEO/MEO satellite communication systems[J].System Engineering and Electronics,2005,27(7):1145-1153. |
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| Authors: | LI Hui GU Xue-mai |
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| Abstract: | Walker delta type constellation is an excellent candidate to compose non-geostationary orbit satellite communication networks. LEO and MEO satellite networks have many characteristics respectively and the elevation angle, azimuth angle and length of ISLs in these two systems are studied especially. Using different routing strategies in order to fulfill different QoS requirements, the two systems behave differentially. A synthetic routing strategy is put forward to analyze delay, delay jitter, handoff and termination of call synthetically in LEO/MEO systems. And the synthetic routing strategy performs better than other four routing strategies if considering the requirements together. So this kind of routing strategy can be used to provide various qualities of services, and improve the validity and reliabil- ity of satellite communication systems. |
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| Keywords: | satellite communication networks non-geostationary orbit ISL QoS routing handoff |
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