| 一种新的基于DCRS的LEO信道分配策略 |
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| 引用本文： | 冯少栋,李广侠,郦苏丹.一种新的基于DCRS的LEO信道分配策略[J].解放军理工大学学报,2007,8(1):1-4. |
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| 作者姓名： | 冯少栋 李广侠 郦苏丹 |
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| 作者单位： | [1]解放军理工大学通信工程学院,江苏南京210007 [2]国防科技大学计算机学院,湖南长沙410073 |
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| 摘 要： | 为提高LEO(low earth orbit)卫星通信系统中系统的信道利用率,在小区用户分布不均匀的前提下,基于动态分配预留保护信道DCRS(dynamic channel reservation scheme)的方法,提出了一种适合于LEO卫星通信系统的信道分配策略.该策略能根据系统中切换呼叫和新呼叫的比例,动态地分配预留的保护信道.仿真结果表明,与传统的固定分配预留保护信道FCRS(fixed channel reservation scheme)的策略相比,在保证一定切换呼叫阻塞概率的情况下,该策略能有效地降低新呼叫阻塞概率,提高信道利用率和系统的QoS(quality of service).
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| 关 键 词： | 动态 信道分配 切换 信道分配策略 based strategy assignment quality of service 情况 呼叫阻塞概率 fixed 固定 仿真结果 动态分配 比例 新呼叫 切换呼叫 方法 dynamic channel reservation scheme |
| 文章编号： | 1009-3443（2007）01-0001-04 |
| 收稿时间： | 2006-02-18 |
| 修稿时间： | 2006年2月18日 |
New channel assignment strategy based on DCRS in LEO |
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| FENG Shao-dong,LI Guang-xia and LI Su-dan.New channel assignment strategy based on DCRS in LEO[J].Journal of PLA University of Science and Technology(Natural Science Edition),2007,8(1):1-4. |
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| Authors: | FENG Shao-dong LI Guang-xia and LI Su-dan |
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| Institution: | Institute of Communications Engineering,PLA Univ.of Sci.&Tech.,Nanjing 210007,China;Institute of Communications Engineering,PLA Univ.of Sci.&Tech.,Nanjing 210007,China;School of Computer Science,National University of Defense Technology,Changsha 410073,China |
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| Abstract: | In order to increase the channel utility in LEO satellite communication system,a new channel assignment strategy in LEO communication system based on DCRS(dynamic channel reservation scheme) was proposed in light of the unequal distribution of the subscribers.The strategy can assign the guarded channel dynamically according to the proportion of the new calls and handoff calls.The simulation results show that the strategy can reduce the new call blocking probability,improve the channel utilization and QoS while guaranteeing the handoff blocking probability compared with FCRS (fixed channel reservation scheme). |
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| Keywords: | dynamic channel assignment handover |
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