| 引用本文: | 段思睿,刘元安,胡鹤飞,等.LEO卫星网络路径选择策略.[J].国防科技大学学报,2014,36(1):67-73.[点击复制] |
| DUAN Sirui,LIU Yuanan,HU Hefei,et al.Path selecting strategy in LEO satellite network[J].Journal of National University of Defense Technology,2014,36(1):67-73[点击复制] |
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| LEO卫星网络路径选择策略 |
| 段思睿, 刘元安, 胡鹤飞, 李虎 |
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(北京邮电大学 电子工程学院，北京 100876)
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| 摘要: |
| 路由算法在选择路径时，主要考虑传输延迟和跳数这两个因素，分别选取最短延迟路径(Least Delay Path, LDP)或最少跳数路径( Least Hops Path, LHP)。在卫星网络中，基于LHP选径策略实现更加简单，但其应用在LEO卫星网络中合理性的研究成果不多。对极轨道LEO卫星网络中，LDP和LHP之间关系进行详细地理论分析，验证了LHP选径策略的合理性。并在此基础上，提出一种基于横向传输优先级（Horizontal Transmitting Priority, HTP）的LHP最短路径选择策略，利用横向链路长短特性简化路径决策流程。通过仿真，该方法能够快速寻找到最短LHP路径，为LEO卫星网络路由算法提供一定的研究基础。 |
| 关键词: 低轨道 卫星网络 卫星星座 路径选择 |
| DOI：10.11887/j.cn.201401013 |
| 投稿日期：2013-04-17 |
| 基金项目:国家自然科学基金资助项目（61272518）；国家重大专项资助项目(2012ZX03003001-004) |
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| Path selecting strategy in LEO satellite network |
| DUAN Sirui, LIU Yuanan, HU Hefei, LI Hu |
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(College of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China)
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| Abstract: |
| The transmission delay and the number of hops in path are the two main factors which should be considered in designing a routing algorithm for a specific network. The paths generated by different routing strategs are called least delay path (LDP) and least hop path (LHP). In satellite network, the algorithm for LHP is much simpler, but there are limited research achievements for the rationality of LHP. A detailed theoretical analysis, in this research, was made for the differences between LDP and LHP in polar circular LEO satellite network. Based on the results of our analysis, a simplified LHP path selecting strategy with an idea of horizontal transmitting priority (HTP) by using the features of horizontal link length was proposed. The simulation results prove that our path selecting strategy can quickly find out the shortest path among all the LHP between every two nodes. It provides a foundation for the research of routing algorithms in LEO satellite network. |
| Keywords: LEO satellite network satellite constellation routing |
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