一种3G中基于三层数据库的呼叫建立机制研究  

A Novel Call Setup Mechanism Based on Three-tier Databases in 3G

作　　者：张昊[1] 廖建新[1] 朱晓民[1] 

机构地区：[1]北京邮电大学网络与交换技术国家重点实验室,北京100876

出　　处：《电子与信息学报》2007年第6期1290-1294,共5页Journal of Electronics & Information Technology

基　　金：国家杰出青年科学基金(60525110);新世纪优秀人才支持计划(NCET-04-0111);高等学校博士学科点专项科研基金资助课题(20030013006);电子信息产业发展基金重点项目(下一代网络核心业务平台);电子信息产业发展基金项目(基于内容的综合通信网络计费平台)资助课题

摘　　要：基于3G网络三层数据库结构中GLR(Gateway Location Register)服务区远大于VLR(Visitor Location Register)服务区的情况,考虑被呼业务本地化(即本地移动用户呼叫本地移动用户的比例占总呼叫数的比例大),通过在GLR中设置缓存的方法,给出了一种新的呼叫建立机制。建立分析模型得到新机制的总代价函数和总时间延迟函数,并同基本呼叫建立机制以及2G网络基于VLR缓存的呼叫建立机制进行了对比分析,验证了新呼叫建立机制的优越性。Based on the situation that the serving area of Gateway Location Register （GLR） is larger than that of Visitor Location Register （VLR） in three-tier database architecture in 3G network, this paper presents a novel call setup mechanism by taking consideration of the locality of the called traffic which means the number of local mobile users calling local users is a large part of the total call number and caching callee current GLR address in caller GLR database. An analytical model is established and the total cost function and total time delay function are presented based on the model. Then the performance of this mechanism is evaluated over the basic call setup mechanism and the VLR cache based call setup mechanism in 2G network. The outcomes show that the new call setup mechanism outperforms the other two mechanisms.

关 键 词：呼叫建立 位置管理 GLR 3G网络 

分 类 号：TN929.5[电子电信—通信与信息系统] TN915[电子电信—信息与通信工程]