| 异构网络中基于最小二乘权值法的MDP垂直切换算法研究 |
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| 引用本文： | 刘胜美,潘甦,糜正琨. 异构网络中基于最小二乘权值法的MDP垂直切换算法研究[J]. 南京邮电大学学报(自然科学版), 2011, 31(6): 7-10,16 |
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| 作者姓名： | 刘胜美 潘甦 糜正琨 |
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| 作者单位： | 南京邮电大学宽带无线通信与传感网技术教育部重点实验室,江苏南京,210003 |
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| 基金项目： | 国家自然科学基金(60872018,60902015);南京邮电大学攀登计划(NY210004);江苏省高校自然科学基金(11KJB510014)资助项目 |
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| 摘 要： | 文中将多属性QoS考虑在内,针对业务特点,提出一种基于最小二乘(LS,Least Square)权值法的MDP(Markov decision processes,马尔可夫决策过程)(LS_MDP)垂直切换算法.为了评估性能,考虑3GPP定义的两类业务,根据业务特点,利用LS法获得决策者对指标的权重向量；接着利用MDP分析方法进行垂直切换判决.通过对算法的性能分析,可以看出LS_MDP算法能够根据各业务特点综合考虑各属性间关系,获得优良的系统性能.
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| 关 键 词： | 异构无线网络 垂直切换 最小二乘法 MDP |
LS-MDP Algorithm for Vertical Handoff Decision in Heterogeneous Wireless Networks |
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| LIU Sheng-mei , PAN Su , MI Zheng-kun. LS-MDP Algorithm for Vertical Handoff Decision in Heterogeneous Wireless Networks[J]. JJournal of Nanjing University of Posts and Telecommunications, 2011, 31(6): 7-10,16 |
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| Authors: | LIU Sheng-mei PAN Su MI Zheng-kun |
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| Affiliation: | Broadband Wireless Communication and Sensor Network Technology Key Laboratory of Ministry of Education,Nanjing University of Posts and Telecommunications,Nanjing 210003,China |
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| Abstract: | An improved MDP algorithm,LS-MDP is proposed for vertical handoff decision in heterogeneous wireless networks.It introduces into the algorithm LS(Least Square) method.Handoff decision meeting multi-attribute QoS requirement is made according to the traffic features.The weight relation of decision elements is determined with LS method.Finally decision is made using MDP algorithm based on the weight vector.Two 3GPP defined traffic classes are considered in performance evaluation.The simulation results have shown that the proposed algorithm can provide satisfactory performance fitted to the characteristics of the traffic. |
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| Keywords: | heterogeneous wireless networks vertical handoff LS MDP |
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