Packet-Based Call Admission Control Scheme in Broadband CDMA Networks
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摘要: 以宽带CDMA网络为研究对象,结合3种主要业务类型(话音、视频、数据)的精确建模,提出了用户连接接纳控制与用户分组接纳控制协作的CAC机制,以及基于优先级的改进CAC方案.该方案根据无线分组网络中以分组为最小资源管理单位的特点,结合系统剩余容量以及不同类型业务的特点,为不同业务设置不同的接入准则.优先接纳对实时性要求高的用户连接和分组,同时尽可能地保证实时性要求较低业务的服务质量.仿真结果表明,所提出的策略有效降低了业务接入的阻塞率和平均接纳延时,同时提高了系统资源利用率.Abstract: A cooperative CAC(call admission control) mechanism for user connection access control and user packet access control,and an improved priority-based CAC scheme were proposed,in which modeling for three major types of traffic,i.e.voice,video and data,were elaborated for application in broadband CDMA(code division multiple access) networks.The scheme takes the packet in wireless packet networks as the minimum resource management unit,incorporates the residual capacity and the traffic characteristics,and sets different access criteria for different types of traffic.The connections and packets with higher real-time demands are given higher accessing priority,while guaranteeing reasonable quality of service for the lower real-time demand traffic.Simulation results show that,with the proposed CAC scheme,the traffic blocking probability and average access delay are efficiently reduced,and the resource utilization efficiency is increased.
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Key words:
- broadband wireless network /
- call admission control /
- multimedia traffic /
- packet /
- CDMA
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朱立东,吴诗其.多业务无线蜂窝移动通信系统的一种呼叫允许控制策略[J].通信学报,2001,22(11):11-21.ZHU Lidong,WU Shiqi.A policy of call admission control for multi-class traffic in wireless mobile cellular communication systems[J].Journal of China Institute of Communications,2001,22(11):11-21.[2] 关皓,杜志涛,李承恕.综合业务CDMA系统的联合呼叫接入-拥塞控制[J].电子学报,1999,27(11A):GUAN Hao,DU Zhitao,LI Chengshu.Joint admission-congestion control for CDMA system with integrated services[J].Acta Electronica Sinica,1999,27(11A):122-124.[3] 李超,汤汉屏,郭金淮,等.基于多码CDMA系统的综合业务接入控制方案[J].电讯技术,2002,3:117-121.LI Chao,TANG Hanping,GUO Jinhuai,et al.An admission control scheme for integrated services based on the MC-CDMA system[J].Telecommunication Engineering,2002,3:117-121.[4] WHA S J,DONG G J.Call admission control for CDMA mobile communication systems supporting multimedia services[J].IEEE Transactions on wireless communications,2002,1(4):649-659.[5] LI F Y,STOL N.A Priority-oriented call admission control paradigm with QoS re-negotiation for multimedia services in UMTS[C]//IEEE VTS 53rd Vehicular Technology Conference.Piscataway:IEEE Press,2001,3:2 021-2 025.[6] HUANG Y.Integrated call admission control and packet scheduling for multimedia direct sequence code division multiple access(DS-CDMA) wireless networks[C]// Vehicular Technology Conference 2004-Fall IEEE 60th.Piscataway:IEEE Press,2004,4:2 673-2 677.[7] HIRAYAMA Y,OKADA H,YAMAZATO T,et al.An access control protocol based on estimation of multimedia traffic with an adaptive algorithm in CDMA packet network[C]//The 13rd IEEE International Symposium on Personal,Indoor and Mobile Radio Communications.Piscataway:IEEE Press,2002,2:619-623.[8] SAMPATH A,KUMAR P S,HOLTZMAN J M.Power control and resource management for a multimedia CDMA wireless system[J].Personal,Indoor and Mobile Radio Communications,1995,1:21-25.[9] GORDON J.Pareto process as a model of self-similar packet traffic[C]//IEEE Global Telecommunications Conference.Piscataway:IEEE Press,1995,3:2 232-2 236[10] ADAS A.Traffic models in broadband networks[J].IEEE Communications Magazine,1997,35(7):82-89[11] SO J W.adaptive traffic prediction based access control in wireless CDMA systems supporting integrated voice/data/video services[J].IEEE Communications Letters,2004,8(12):703-705.[12] SAMPATH A,HOLTZMAN J M.Access control of data in integrated voice/data CDMA systems:benefits and tradeoffs[J].IEEE Journal on Selected Areas in Communications,1997,15(8),1 271-1 275.[13] FANTACCI R,NANNICINI S.Multiple access protocol for integration of variable bit rate multimedia traffic in UMTS/IMT-2000 based on wideband CDMA[J].IEEE Journal on Selected Areas in Communications,2000,18(8):1 450-1 453.
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