基于D2D分组的二次选择资源分配算法

Two Selection Resource Allocation Algorithm Based on D2D Pairs Grouping

为了降低D2D系统的中断概率以及提高系统中所有用户的有效连通率。在设置最低通信要求的情况下,提出一种基于D2D分组的二次选择资源分配算法。首先根据功率检测步骤检测D2D用户,对D2D用户采取比例公平策略选取最优集。把不通过的D2D用户集采取重新分组的形式进行复用选取,通过推广的功率检测算法选取出最优集。最后把最优集合并得到最终复用集。仿真分析表明,所提出算法在系统吞吐量变化较小的情况下使系统在多D2D用户数时的上行连通率平均提高了11.2%,下行连通率平均提高了13%。

In order to reduce the outage probability of D2D systems and improve the effective connectivity of all users in the system, in the case of setting Qos requirements, a two selection resource allocation algorithm based on D2D pairs grouping is proposed. At first, the D2D user is detected by the power detection step, and D2D users adopt pro portional fair strategy to select the optimal set. The D2D user set is reused in the form of regrouping, and the optimal set is selected by the extended power detection algorithm. Finally, the optimal set is merged to the final reuse set. The simulation results show that the uplink connectivity of the system average is increased by 11.2% on the multiple D2D users, and the downlink connectivity is increased by 13% when the system throughput is changed little.