| 一种支持IMS异构网络的垂直切换算法 |
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| 引用本文： | 于波,于东,贾军营.一种支持IMS异构网络的垂直切换算法[J].计算机工程,2012,38(22):10-14. |
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| 作者姓名： | 于波 于东 贾军营 |
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| 作者单位： | 1. 中国科学院沈阳计算技术研究所,沈阳110168;中国科学院研究生院,北京100049
2. 中国科学院沈阳计算技术研究所,沈阳,110168 |
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| 摘 要： | 为解决IMS异构无线网络的切换时延问题，设计一种IEEE 802.21定义的媒介无关切换标准与IMS架构相融合的方案，并在此基础上提出一种多路径冗余传输切换算法，采用马尔科夫决策过程实现在IMS异构网络中的无缝切换。NS-2仿真实验结果表明，该算法与传统垂直切换算法相比，在切换过程中的有效数据传输率、切换次数及切换稳定性均显示出一定优势。
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| 关 键 词： | IMS架构 垂直切换 异构网络 媒介无关切换 马尔科夫决策过程 切换策略 |
| 收稿时间： | 2012-02-28 |
| 修稿时间： | 2012-03-26 |
A Vertical Handover Algorithm for IMS Heterogeneous Network |
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| YU Bo
,
YU Dong
,
JIA Jun-ying.A Vertical Handover Algorithm for IMS Heterogeneous Network[J].Computer Engineering,2012,38(22):10-14. |
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| Authors: | YU Bo YU Dong JIA Jun-ying |
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| Affiliation: | (1. Shenyang Institute of Computing Technology, Chinese Academy of Sciences, Shenyang 110168, China; 2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China) |
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| Abstract: | In order to solve the problem of IMS heterogeneous wireless networks handoff delay, an integration resolution of IEEE 802.21-defined Media Independent Handover(MIH) and IMS architechture is proposed. An algorithm of Markov Decision Process(MDP) based multipath redundant transmission handover is presented, through which seamless handover in IMS is realized. NS-2 simulation results prove that the algorithm compared with the traditional vertical handover algorithm, the effective data transmission rate, handover times and handover stability show a clear advantage. |
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| Keywords: | IMS architechture vertical handover heterogeneous network Media Independent Handover(MIH) Markov Decision Process(MDP) handover policy |
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