摘要
呼叫接入控制(CAC)在宽带无线接入(BWA)服务质量(QoS)中起着非常重要的作用。对无线城域网中IEEE802.16复杂的QoS定义,该文提出了一种在IEEE802.16中基于自适应资源预留的呼叫接入控制策略(AR-CAC)。该策略根据UGS负载和信道利用率为其自适应预留信道,同时考虑了IEEE802.16业务的带宽特性。仿真结果表明,该策略在硬切换呼叫切换失败概率不变的情况下降低了高优先级服务的呼叫阻塞率,同时增大了系统的吞吐量。
Call Admission Control （CAC） plays a key role in providing the desired Quality of Service in Broadband Wireless Access（BWA）.In this paper,an adaptive channel reservation call admission control（AR-CAC） is presented for miscellaneous QoS definition in IEEE802.16 network.This scheme adaptively reserves channels based on UGS traffics,channel utility probability and bandwidth characters of IEEE 802.16.The results show that it reduces call blocking probability of higher priority services and increases the throughput of system with immovability of hard handoff call droo orobability.
出处
《计算机工程与应用》
CSCD
北大核心
2008年第13期103-105,158,共4页
Computer Engineering and Applications
基金
湘潭大学跨学科交叉研究项目(No.05IND01)
关键词
呼叫接入控制
服务质量
宽带无线接入
全球通用无线微波技术
Call Admission Control
Quality of Service
Broadband Wireless Access
Worldwide Interoperability for Microwave Access（WiMAX）
