一种CDMA网络多业务的呼叫允许控制算法
doi: 10.3724/SP.J.1146.2006.01908
A Call Admission Control in Multi-Service CDMA Networks
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摘要: 现今无线网络中的多媒体业务具有很大需求。该文对多业务CDMA通信系统容量进行分析,引入有效带宽概念,提出一种呼叫允许控制资源分配优化算法(CAC-RA)。此算法将多媒体业务分为实时业务和非实时业务,通过对自适应实时业务采用马尔科夫模型,对非实时业务采用排队模型,将两模型合并生成的的利益函数采用非线性规划,使呼叫允许控制、切换策略和资源分配问题同时得到解决。实验数据显示CAC-RA算法实现了合理的资源利用和最大的利益值,能较好地适应多业务CDMA网络。Abstract: There is a great demand on multimedia services in wireless networks. Capacity analysis of a multi-service CDMA communication system is employed in which the concept of equivalent bandwidth is introduced, and then an optimal Call Admission Control and Resource Allocation algorithm (CAC-RA) is proposed. in CAC-RA, multimedia traffic is classified into two classes: real-time trafficand non real-time traffic, and manage Call Admission Control (CAC), handoff scheme and resource allocation (RA) together by adopting Markov Decision Process model for adaptive real-time applications, queuing model for non real-time applications ,and nonlinear programming for the proposed revenue function which combine these two models. Numerical results reveal that the proposed CAC-RA scheme adapts itself well to multi-service CDMA networks by achieving reasonable utilization of resources.
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