一种优化的CDMA-Underlay模式下无线认知蜂窝用户资源分配机制

An optimization mechanism of user resource allocation under CDMA-Underlay wireless cognitive cellular

为了对无线认知蜂窝网络中Underlay-CDMA模式下资源分配的公平性策略进行研究,在分析了传统的基于公平效用的分配标准及模式的基础上,提出一种优化的加权平均公平性策略.采用功率-速率的加权平均值作为效用函数的WAF策略进行资源分配,可以更好地平衡系统吞吐量以及速率之间的关系.仿真结果表明,在Underlay-CDMA模式下该策略与传统的最大最小和比例公平等策略相比具有更好的公平性.

In order to solve the fairness criteria of radio resource allocation under Underlay- CDMA mode,on the analysis of traditional based on utility fair allocation standard and model,this article proposes a new utility- based fairness strategy after analyzing the traditional fairness criteria. It can yield a better balance between throughput and rate by using the weighted average strategy of joint rate- power,namely WAF,as the utility function in resource allocation. Simulation results show that,compared with the conventional fairness policy（ namely the max- min fairness criteria and proportional fairness）,the proposed method has more effectiveness and superiority in Underlay- CDMA wireless cognitive cellular network.