基于GoS的功率控制WCDMA系統(tǒng)呼叫準入控制算法
GoS-Based Call Admission Control Algorithm for Power Controlled WCDMA Networks
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摘要: 該文提出的基于GoS的呼叫準入控制(GoS-CAC)算法的判決門限綜合了多種因素:系統(tǒng)負荷、各業(yè)務服務質(zhì)量(QoS)要求、信道質(zhì)量、干擾水平、系統(tǒng)服務等級(GoS)以及用戶的切換等等。GoS-CAC算法與功率/ 數(shù)據(jù)速率調(diào)節(jié)機制巧妙結(jié)合,具有判決速度快、精度高、門限自適應和簡單易行等特點。仿真結(jié)果表明,與傳統(tǒng)CAC算法相比,GoS-CAC算法的切換用戶業(yè)務阻塞性能優(yōu)約10%,系統(tǒng)GoS優(yōu)50%左右,而中斷性能優(yōu)57%以上。
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關(guān)鍵詞:
- 寬帶碼分多址; 呼叫準入控制; 功率控制; 切換; 自適應
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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