摘要
针对第三代CDMA移动通信系统软切换关键技术,给出了基于一个宏小区和两个微小区重迭结构软切换的一种模型。在引入小区前反向链路平衡概念的基础上,重点对宏小区系统的软切换增加门限与微小区系统负载因子的关系,以及宏小区系统的软切换增加门限与其它小区干扰对微小区用户干扰之比的关系进行了定量分析和相应的性能仿真。通过分析可看出:该模型可合理地降低CDMA系统软切换呼叫阻塞率,改善CDMA系统的通信质量。
Aiming at the soft handover key technology of the third generation CDMA mobile communication systems,a soft handover model of overlaid cellular based on one macrocell and two microcells are given.After introducing the conception of the balance of the forward link and reverse link,the relationship between the soft handover add threshold in marcocell system and the load factor in microcell system,and the relationship between the soft handover add threshold in mareocell and the ratio of the interfere of other cells users to the microcell users are analyzed quantitatively and simulated according to their corresponding performance.According to the analysis,it is shown that call blocking ratio of soft handover is decreased and communication quality is improved in CDMA systems.
出处
《计算机工程与应用》
CSCD
北大核心
2007年第24期146-148,共3页
Computer Engineering and Applications
