基于分组的宽带CDMA网络呼叫接纳控制方案  

Packet-Based Call Admission Control Scheme in Broadband CDMA Networks

作　　者：方旭明[1] 朱龙杰[1] 张丹丹[1] 

机构地区：[1]西南交通大学移动通信省重点实验室

出　　处：《西南交通大学学报》2007年第1期1-7,共7页Journal of Southwest Jiaotong University

基　　金：南京大学计算机软件新技术国家重点实验室开放基金(A200605)的资助.

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.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.

关 键 词：宽带无线网络 呼叫接纳控制 多媒体业务 分组 CDMA 

分 类 号：TN929.53[电子电信—通信与信息系统]