一种用于无线ATM网络多媒体业务的CAC方案  

A Call Admission Control for Multimedia Service in Wireless Mobile ATM Networks

作　　者：赵峰[1] 曾文海[1] 席在芳[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《衡阳师范学院学报》2004年第3期30-34,共5页Journal of Hengyang Normal University

摘　　要：本文提出一种用于无线ATM网络多媒体业务的CAC方案。在该方案中,延迟约束用于可变比特速率,抖动约束服务质量(QoS)用于不变比特速率,从而保证了所有通信预定义的服务质量要求。为了减少切换掉话率,CAC方案赋予切换呼叫的优先权比新呼叫的高,并预约适当资源用于潜在的切换呼叫。CAC方案中的资源预留是通过用户移动信息来确保资源有效利用。分析结果表明,所提出的CAC方案能取得较低的切换掉话率和较高的系统资源利用率。An efficient call admission control scheme for multimedia service in wireless ATM networks is proposed in this paper. Quality-of-service provisioning of jitter bounds for constant bit rate traffic and delay bounds for variable bit rate traffic is used in the CAC scheme to guarantee predefined QoS levels for all traffic classes. To reduce the forced handoff call dropping priority than new calls by reserving an appropriate amount of resource for potential handoff calls. Resource reservation in the CAC scheme makes use of user mobility information to ensure efficient resource utilization. It is evident that the proposed CAC scheme can obtain lower dropping of calls and higher resource utilization .

关 键 词：ATM 多媒体业务 服务质量 CAC 

分 类 号：TN929.5[电子电信—通信与信息系统]