| 异构分层无线网络中基于业务QoS保证的切换策略研究 |
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| 引用本文： | 宁国勤,张静,刘干,朱光喜.异构分层无线网络中基于业务QoS保证的切换策略研究[J].计算机科学,2010,37(1):83-86. |
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| 作者姓名： | 宁国勤 张静 刘干 朱光喜 |
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| 作者单位： | 1. 华中师范大学信息技术系,武汉,430079
2. 华中科技大学武汉光电国家实验室,武汉,430074 |
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| 基金项目： | 国家自然科学基金资助项目(No.60672059);;国家高技术研究发展计划(“863”计划)资(No.2006AA01Z233)资助 |
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| 摘 要： | 针对异构分层无线网络提出了一种保证业务QoS的切换策略。该策略在层间呼叫双向溢出基础上,为实时业务切换设置了保护信道,为非实时业务切换设置了缓冲队列。为了进一步降低实时业务切换的掉线率,还使用了信道侵占技术,原理是实时业务切换呼叫可以侵占数据业务正在使用的信道资源。仿真结果表明,提出的切换方法能够显著降低各类切换业务的掉线率,同时整个异构分层系统的信道利用率也略有提高。
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| 关 键 词： | 异构分层无线网络 切换 服务质量 保护信道 信道侵占 |
| 收稿时间： | 2009/2/20 0:00:00 |
| 修稿时间： | 2009/4/28 0:00:00 |
Research on Handoff Strategy Based on Traffic QoS Guaranteed for Heterogeneous Hierarchical Wireless Networks |
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| NING Guo-qin,ZHANG Jing,LIU Gan,ZHU Guang-xi.Research on Handoff Strategy Based on Traffic QoS Guaranteed for Heterogeneous Hierarchical Wireless Networks[J].Computer Science,2010,37(1):83-86. |
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| Authors: | NING Guo-qin ZHANG Jing LIU Gan ZHU Guang-xi |
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| Affiliation: | Department of Information Technology/a>;Huazhong Normal University/a>;Wuhan 430079/a>;China;Wuhan National Laboratory of Optoelectronics/a>;Huazhong University of Science and Technology/a>;Wuhan 430074/a>;China |
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| Abstract: | A handoff strategy was proposed to guarantee the traffic QoS in heterogeneous hierarchical wireless networks.Based on the bidirectional call-overflow between different networks,guard channels were set for real-time traffic handoffs and buffer queues were set for non-real-time traffic handoffs.In order to further decrease the dropping probability of real-time traffic handoffs,preemption scheme was also used,which principle is that real-time traffic handoffs can preempt the channels used by the ongoing non-re... |
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| Keywords: | Heterogeneous hierarchical wireless networks Handoff Quality of service (QoS) Guard channels Channel preemption |
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