| 低轨卫星移动通信系统接入方案 |
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| 引用本文： | 凌翔,胡剑浩,吴诗其.低轨卫星移动通信系统接入方案[J].电子学报,2000,28(7):70-73. |
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| 作者姓名： | 凌翔 胡剑浩 吴诗其 |
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| 作者单位： | 电子科技大学通信学院,成都 610054 |
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| 基金项目： | 8 63基金，中兴基金资助项目 |
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| 摘 要： | 在低轨卫星移动通信系统中,由于卫星和移动用户间的相对运动使得呼叫切换频繁发生.为了降低星间切换请求到达率,减小系统切换开销,本文在距离优先接入方案基础上进一步提出了两种接入策略:覆盖时间优先方案和仰角加权的覆盖时间优先方案.构造了非均匀分布全球话务密度模型.并参照某实际系统参数,对不同接入方案准则下的全球话务服务进行了系统仿真,得到了相应的系统性能参数.
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| 关 键 词： | 卫星移动通信 切换 接入方案 话务模型 |
| 收稿时间： | 1999-06-10 |
Access Schemes for LEO Satellite Mobile Communication Systems |
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| LING Xiang,HU Jian-hao,WU Shi-qi.Access Schemes for LEO Satellite Mobile Communication Systems[J].Acta Electronica Sinica,2000,28(7):70-73. |
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| Authors: | LING Xiang HU Jian-hao WU Shi-qi |
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| Affiliation: | ICIE,Univ.of Elec.Sci.&Tech.of China,Chengdu 610054,China |
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| Abstract: | In low earth-orbiting (LEO) satellite mobile communication systems,frequent han dover requests exist because of the relative motions between the satellites and the mobile users.In order to decrease the handover requests for systems saving,t wo access schemes besides the distance-prioritized scheme are proposed in this paper.One judges the priorities by estimating the overlaid time,the other scheme additionally considering the elevation angle performance.A non-uniform distrib uted global traffic model is also constructed.By emulating the global traffic se rvice through a LEO satellite mobile communication system under different access schemes,the performance of the networks are analyzed. |
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| Keywords: | satellite mobile communication handover access scheme traffic model |
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