基于分组的宽带CDMA网络呼叫接纳控制方案

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人的阻塞率和平均接纳延时，同时提高了系统资源利用率．

Packet-Based Call Admission Control Scheme in Broadband CDMA Networks

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.