Heuristic RAT selection policy to minimize call blocking probability in next generation wireless networks
Heuristic RAT selection policy to minimize call blocking probability in next generation wireless networks
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DOI：
10.1002/wcm.v10:2
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发表时间：
2010-02
影响因子：
8.3
通讯作者：
J. Jun;Young-June Choi;S. Bahk
中科院分区：
文献类型：
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作者：
J. Jun;Young-June Choi;S. Bahk
在多种无线接入技术（RAT）共存的下一代无线网络（NGWN）中，需要联合呼叫接纳控制（JCAC）算法来为每个到达的呼叫做出RAT选择决策。RAT选择策略对网络中的整体新呼叫阻塞概率具有显著影响。我们提出了一种启发式RAT选择策略，以最大限度地减少新的呼叫阻塞概率下一代网络。建议的JCAC计划的措施，在异构无线网络中的每一类呼叫的到达率。基于测量值的到达率和使用线性规划技术，JCAC方案确定RAT选择策略，最大限度地减少整体呼叫阻塞概率在异构无线网络。使用马尔可夫决策过程，我们开发了一个分析模型的JCAC方案，并推导出新的呼叫阻塞概率，切换呼叫丢弃概率（HCDP），和呼叫未完成概率（CIP）。该方案的性能与其他JCAC方案的性能进行了比较。仿真结果表明，该方案在异构无线网络中降低了新呼叫阻塞率、HCDP和CIP。版权所有© 2009 John Wiley & Sons，Ltd.在多种无线电接入技术（RAT）共存的下一代无线网络（NGWN）中，需要联合呼叫准入控制（JCAC）算法来为每个到达的呼叫做出RAT选择决策。我们提出了一种启发式的RAT选择策略，以减少呼叫阻塞概率下一代网络，并开发了一个分析模型来评估其性能。仿真结果表明，该方案降低了下一代网络中新呼叫阻塞概率、切换掉话概率和呼叫未完成概率。
In next generation wireless network (NGWN) where multiple radio access technologies (RAT) co-exist, a joint call admission control (JCAC) algorithm is needed to make a RAT selection decision for each arriving call. RAT selection policy has a significant effect on the overall new call blocking probability in the network. We propose a heuristic RAT selection policy to minimize new call blocking probability in NGWN. The proposed JCAC scheme measures the arrival rate of each class of calls in the heterogeneous wireless network. Based of the measured values of the arrival rates and using linear programming technique, the JCAC scheme determines the RAT selection policy that minimizes overall call blocking probability in the heterogeneous wireless network. Using Markov decision process, we develop an analytical model for the JCAC scheme, and derive new call blocking probability, handoff call dropping probability (HCDP), and call incompletion probability (CIP). Performance of the proposed scheme is compared with the performance of other JCAC scheme. Simulation results show that the proposed scheme reduces new call blocking probability, HCDP, and CIP in the heterogeneous wireless network. Copyright © 2009 John Wiley & Sons, Ltd. In next generation wireless network (NGWN) where multiple radio access technologies (RAT) co-exist, a joint call admission control (JCAC) algorithm is needed to make a RAT-selection decision for each arriving call. We propose a heuristic RAT selection policy to reduce call blocking probability in NGWN, and develop an analytical model to evaluate its performance. Simulation results show that the proposed scheme reduces new call blocking probability, handoff call dropping probability, and call incompletion probability in NGWN.