基于多业务的移动通信系统呼叫接入控制  

Call Admission Control in Mobile Communication System Based on Multi-service

作　　者：王中伟[1] 夏晓燕 邓磊 覃锡忠[1] 贾振红[1] 

机构地区：[1]新疆大学信息科学与工程学院,乌鲁木齐830046 [2]中国移动通信集团新疆有限公司,乌鲁木齐830063

出　　处：《计算机工程》2012年第24期81-85,共5页Computer Engineering

基　　金：中国移动新疆分公司研究发展基金资助项目(xjm2011-1)

摘　　要：针对在可移动边界保护信道方法中新呼叫堵塞率高的问题,提出一种呼叫接入控制策略。当切换呼叫的掉话率小于门限时,新呼叫以一定的概率使用为切换呼叫预留的保护信道。当高优先级数据等待队列中的数据包为空时,传输普通数据等待队列中的数据包。仿真结果表明,在对切换呼叫掉话率影响较小的前提下,该策略能够有效降低新呼叫的堵塞率和高优先级数据的掉包率。Aiming at the problem of high call blocking rate in Movable Boundary and Guard Channel（MBGC） method,this paper presents a novel call admission control algorithm.The strategy is that the new call users can use the guard channel reserved for the handoff call users with a certain probability when the handoff call dropping rate is less than a threshold.The scheme also takes into account the priority of different data types,and only when the data packet in high-priority data queue is empty,the data packets in general data queue can be transmitted.Simulation results show that,in case of affecting dropped call rate of handoff calls smaller,it can effectively reduce the new call blocking rate and high-priority data blocking rate.

关 键 词：排队理论 信道分配 呼叫接入控制 优先级 马尔科夫过程 

分 类 号：TN91[电子电信—通信与信息系统]