WCDMA/HSPA移动系统一种高效率多码分配算法

针对3GPP所推荐的WCDMA/HSPA移动系统OVSF多码分配算法在用户速率很高的情况下所需的计算量与复杂度过高、没有考虑移动终端的多码能力等缺点,文章提出了一种高效多码分配算法。该算法首先判断当前系统频宽是否满足连线需求,如满足,依次计算剩余码组合和多码组合,然后判断多码组合的码数量是否满足移动终端的多码能力,如不满足则重新计算次佳剩余码组合或执行重配置机制后再计算多码组合。仿真实验结果表明：在满足移动节点Rake Combiners个数的情况下,高效多码分配算法较3GPP所推荐的多码分配算法在剩余高扩频增益码数方面要多,并且执行重配置次数方面也要少。

An High Efficient Multi-code Allocation Algorithm for WCDMA/HSPA Mobile System

In response to the OVSF multi-code allocation algorithm for WCDMA/HSPA mobile system recommended by 3GPP, with some shortcomings when the user rate is very high, such as excessive calculation and complexity required and not taking into account multi-code capacity of mobile terminals, the paper presents an high efficient multi-code allocation algorithm. The algorithm first determines whether the current system bandwidth meets the wiring requirements; if so, it will calculate the residue codes combinations and multi-code combinations by order; then it will determine whether the code number of the multi-code combinations reaches the multi-code capacity of mobile terminals, and if not so, it will recalculate the sub-optimal residue codes combinations or perform the reconfiguration mechanism, and then calculate multi-code combinations. Simulation results show, in the case of meeting the number of mobile nodes Rake Combiners, the high efficient multi-code allocation algorithm is more residue high spread spectrum gain codes than those of the multi-code allocation algorithm recommended by the 3GPP, and also performs less reconfigurations.