| 摘要: |
| 在均匀业务模型的基础上，根据LEO卫星通信系统自身特点，提出了一种简单有效的呼叫接入控制策略，这种策略能在非均匀业务下较好地工作，此时系统新呼叫阻塞率和切换呼叫失败率能达到更好的平衡。在分析随机接入（RANDOM）算法和预留保护信道（GC）算法的基础上，进行了计算机仿真，并给出了相应的仿真结果。 |
| 关键词: 低轨卫星通信系统 呼叫接入控制 波束切换 |
| DOI：10.3969/j.issn.1001-893X. |
| Received:January 23, 2006Revised:May 18, 2006 |
| 基金项目:国家自然科学基金 |
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| Call Admission Performance Analysis of LEO Satellite Communication Systems |
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| Abstract: |
| On the basis of the uniform traffic pattern,a simple and effective call admission control(CAC) algorithm is introduced according to the characteristic of low earth orbit(LEO) communication systems,which can handle nonuniform traffic distribution over the coverage area.Meanwhile,the new call blocking probability and the handover call dropping probability of the system can reach a better balance.Based on the random access scheme and guard channel(GC) scheme,computer simulation is performed and the corresponding results are presented. |
| Key words: LEO satellite communication system,call admission control(CAC),spotbeam handover |
