一种CDMA EVDO系统负荷算法的优化设计

Optimal Design on Reverse Load Algorithm of CDMA EVDO System

CDMAEVDO系统是一种高速数据传输系统,数据传输本身具有传输突发性和传输速率波动大的特点。同时,由于CDMAEVDO系统前向采用满功率时分复用方式,只有反向采用码分复用方式,所以对于链路负荷的控制只集中在反向链路过载控制上面。针对数据系统,负荷控制算法的难点在于反向链路数据的突发性对系统造成的干扰,以及如何平衡系统吞吐量与抑制反向干扰。针对现有负荷算法自身的特点,文中设计了多条件下的对比测试实验,通过对测试数据进行分析,结合现有算法设计文中提出了一种切实可行的优化负荷算法,能够弥补现有负荷控制算法的不足。

CDMAEVDOisahighratedatatransmit system, in which access terminals have the ability to quickly transit from one rate to another and to support high burst rate. However, the forward link adopts time division multiplex mode in CDMA EVDO while the reverse link the code division multiplex mode. So only the reverse link load needs to be controlled in system. It is difficult for reverse load control algorithm to balance the system throughput and rise-over-thermal control in the CDMA EVDO data systems, which supports high burst rates. This paper describes the contrast tests based on the feature of origin reverse load control algorithm, and optimization of the algorithm based on the test result, and this algorithm can be implemented and realized in the real CDMA EVDO system,