基于模糊逻辑的呼叫允许控制研究
Call Admission Control Using Fuzzy Logic in Wireless Networks
-
摘要: 无线频谱资源的缺乏以及用户的移动性使无线网络的服务质量的供给成为一个日益严峻的问题。为了满足服务质量的需要，该文提出蜂窝移动通信系统的一种模糊呼叫允许控制方案。它自动搜寻基站中保护信道数量的最优值，使资源得到合理的利用并保证服务质量的供给。对提出的模糊方案和一种动态信道预留方案进行了仿真比较，仿真结果表明模糊方案具有较强的鲁棒性，方案的呼叫阻止率、切换掉线率和信道利用率等性能参数都优于自适应方案。Abstract: Scarcity of the spectrum resource and mobility of users make Quality-of-Service(QoS) provision a critical issue in wireless networks. This paper presents a fuzzy call admission control scheme to meet the requirement of QoS. It searches automatically the optimal number of the guard channels in a base station to make an effective use of resource and guarantee the QoS provision. Simulation compares the proposed fuzzy scheme with a dynamic channel reservation scheme. Simulation results show fuzzy scheme has a better robust performance. It outperforms the adaptive scheme in terms of call dropping probability, call blocking probability, and channel utilization.
-
Hong D, Rappaport S. Traffic model and performance analysis for cellular mobile radio telephone systems with prioritized and non-prioritized handoff procedures[J].IEEE Trans. on Vehicular Technology.1986, 35(3):77-92[2]Oliveira C, Kim J B, Suda T. An adaptive bandwidth reservation scheme for high-speed multimedia wireless networks[J].IEEE J. on Selected Areas in Communications.1998, 16(6):858-874[3]Zhang Y, Liu D. An adaptive algorithm for call admission control in wireless network. IEEE Global Telecommunications Conference, San Antonio, Texas, USA, 2001: 3628-3632.[4]Ko Y C, Cho C H. Adaptive handoff guard channel allocation scheme using fuzzy logic in personal communications service. IEEE ICUPC, San Diego, CA, USA, 1997: 239-243.[5]Kim S, Varshney P K. An adaptive bandwidth reservation algorithm for QoS sensitive multimedia cellular networks. Proc.. of the 56th IEEE Vehicular Technology Conference, Vancouver, Canada, 2002: 1475-1479.[6]Boumerdassi S. An efficient reservation-based dynamic channel assignment strategy. IEE First International Conference on 3G Moblie Communication Technoligies, London, UK, 2000: 352-355.[7]Rappaport T S. Wireless Communications Principles and Practice. New York: Prentice Hall Inc., 1996, Chapter 2.[8]Ross T J. Fuzzy Logic with Engineering Applications. New York: McGraw-Hill, 1995, Chapter 13. -
计量
- 文章访问数: 2052
- HTML全文浏览量: 106
- PDF下载量: 589
- 被引次数: 0
下载:
