基于GoS的功率控制WCDMA系统呼叫准入控制算法
GoS-Based Call Admission Control Algorithm for Power Controlled WCDMA Networks
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摘要: 该文提出的基于GoS的呼叫准入控制(GoS-CAC)算法的判决门限综合了多种因素:系统负荷、各业务服务质量(QoS)要求、信道质量、干扰水平、系统服务等级(GoS)以及用户的切换等等。GoS-CAC算法与功率/ 数据速率调节机制巧妙结合,具有判决速度快、精度高、门限自适应和简单易行等特点。仿真结果表明,与传统CAC算法相比,GoS-CAC算法的切换用户业务阻塞性能优约10%,系统GoS优50%左右,而中断性能优57%以上。Abstract: The proposed Grade of Service based Call Admission Control (GoS-CAC) algorithm operates a threshold comparison, which integrates many factors that affect the decision accuracy of a CAC scheme such as system traffic loads, Quality of Service (QoS) requirements, channel quality, interference level, system GoS and user handoff, etc. The GoS-CAC algorithm cooperates subtly with a power/data rate adjustment scheme making able fast, accurate, adaptive threshold, simple and feasible decision-making about incoming calls. Simulation results show that the proposed algorithm outperforms traditional CAC schemes about 10%, 50% and above 57% in terms of handoff service blocking probability, system GoS and overall system dropping probability, respectively.
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Jansen M G, Prasad R. Capacity, throughput, and delay analysis of a cellular DS-CDMA system with imperfect power control and imperfect sectorization[J].IEEE Trans. on Veh. Technol.1995, 44(2):67-[2]Badia L, Zoriz M. A framework for call admission control with threshold setup and evaluation of the performance in WCDMA systems. in Proc. of the IEEE Vehicular Technology Conference (VTC Spring 2003), Cheju, Apr. 2003, vol.2:1213 - 1217.[3]Kim D. Efficient interactive call admission control in powercontrolled mobile systems[J].IEEE Trans. on Veh. Technol.2000,49 (3):1017-[4]Liu Z, Zarki M E. SIR-based call admission control for DS-CDMA cellular systems[J].IEEE J. on Select. Areas Commun.1994, 12 (4):638-[5]Shin S M, Cho C H, Sung D K. Interference-based channel assignment for DS-CDMA cellular systems[J].IEEE Trans. on Veh.Technol.1999, 48 (1):233-[6]Imre S, Hanko K, Petras P, et al.. Efficient call admission control method for 3G/4G WCDMA networks. In Proc. Of 7thInternational Conference on Telecommunications-ConTel 2003,Zagreb, Croatia, June 2003:293 - 300.[7]Kim K, Han Y. A call admission control scheme for multi-rate traffic based on total received power. IEICE Trans. on Commun.,2001, E84-B(3): 457 - 463.[8]Liu Jiabin, Zhu Shihua, Li Wenyuan. A combined rate and power control scheme and its impact on the capacity of multimedia DS-CDMA systems[J].in Proc. of International Conferences on Info-tech and Info-net (IEEE ICII2001), Beijing, Oct.2001,vol.2:156- -
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