cdma2000 1x EV-DO系统中一种自适应速率控制方案

An Adaptive Rate Control Method for cdma2000 1x EV-DO Systems

cdma2000 1x EV-DO标准支持可变速率的高速无线数据业务,它在反向链路上采用分布式速率控制机制。文中提出一种通过控制RateLimit来进行自适应速率控制的方案,并引入离散马尔可夫链模型对此方案进行了理论分析。仿真结果显示,所提方案在过载概率和反向链路有效吞吐量两个指标上优于1xEV-DO标准中的方案,因此,提高了反向链路速率控制的性能。

The cdma2000 1x EV-DO standard supports the variable rate of high-speed wireless data service, a distributed rate control mechanism is adopted on the reverse link. In this paper, an adaptive rate control scheme based on the control of RateLimit is proposed, and the proposed scheme is analyzed theorectically through introducing a discrete Markov process modeling. It is shown that the proposed scheme outperforms the 1x EV-DO rate control scheme in overload probability and effective reverse link throughput. So this scheme improves the performance of reverse link.