支持动态带宽分配的呼叫接入策略  

Dynamic Bandwidth Allocation Based Call Access Strategy

作　　者：罗长远[1] 冉崇森[1] 

机构地区：[1]解放军信息工程大学,郑州450004

出　　处：《计算机工程与应用》2004年第35期163-165,221,共4页Computer Engineering and Applications

摘　　要：为了适应无线网络对多媒体业务的业务服务质量的需求,论文根据无线网络的多媒体业务特征,提出了一种支持动态带宽分配的无线多媒体业务的呼叫接入策略。通过对该策略进行数学模型分析和数值仿真,结果表明,该策略在小区带宽紧张时,通过降低可变带宽业务的业务带宽,能有效降低用户呼叫阻塞概率和中断概率;在小区带宽有剩余时,可以通过增加可变带宽业务的服务带宽来提高资源利用率。另外,可变带宽业务还能够灵活地借用为越区切换用户预留的带宽资源,充分地利用系统资源。This paper proposes a dynamic bandwidth allocation based call access strategy of wireless multimedia service for adapting to the Qos requirement of wireless cellular network.Through seting up the model and analysis,the simulation results show that the scheme can decrease call block probability,call drop probability by decreasing the service bandwidth of variable bandwidth service when there is not free bandwidth in the cell,and increase bandwidth utilization by increasing the service bandwidth of variable bandwidth service when there is free bandwidth in the cell.In addition,the scheme also can increase bandwidth utilization by allowing variable bandwidth service to borrow bandwidth from reservation bandwidth for handoff calls.

关 键 词：移动通信系统 呼叫接入控制 动态带宽分配 无线网络 多媒体业务 业务服务质量 

分 类 号：TN929.5[电子电信—通信与信息系统]