一种新的支持多业务的CDMA网络可升降级动态带宽分配与优化策略  

A Novel Dynamic Bandwidth Allocation and Optimization Strategy Supporting Multi-Traffics for CDMA Networks

作　　者：甄皓琮[1] 方旭明[1] 朱龙杰[1] 

机构地区：[1]西南交通大学信息科学与技术学院,四川成都610031

出　　处：《电子学报》2006年第7期1209-1215,共7页Acta Electronica Sinica

基　　金：西南交通大学科研基金(No.2005B02)

摘　　要：未来无线通信网络的主要发展方向是支持多种业务.在3GPP对UMTS的规范中,将业务按其属性对服务质量(Quality of Service,QoS)要求的不同分为4类:会话类、流媒体类、交互类和背景类,除话音业务外其余3种业务都是可变比特速率业务.对该网络用户资源分配(主要是带宽的分配)若采用传统的固定分配方法,必定陷入资源利用率低下和用户QoS得不到保障的两难境地.本文针对宽带CDMA网络,提出了一种针对无线多媒体业务的动态带宽分配与优化策略,在保证用户QoS的前提下,尽可能提高资源利用率.仿真结果表明,对比传统的网络资源管理策略,该策略大大改善了系统的性能,提高了系统资源利用率.Supporting multi-traffics is the direction in the future wireless communication networks. According to the 3GPP UMTS standard, there are four traffic classes distinguished by their different QoS demand,including conversational class, streaming class,interactive class, and background class, while three of them are variable bit rate （VBR） traffic except conversational class. It will fall into a dilemma if conventional resource allocation methods are applied （ especially for the bandwidth allocation）. In this paper, a dynamic bandwidth allocation scheme is proposed for broadband CDMA networks. The scheme could meet the user＇ s QoS guarantee, while the utility of resource could be improved. Simulation results demonstrate that the proposed scheme can greatly improve the system performance and resource utility compared with the conventional schemes.

关 键 词：无线通信网络 无线资源管理 QOS 优化 

分 类 号：TN929.5[电子电信—通信与信息系统]