蜂窝网络中基于D2D用户总能量效率保证的资源分配策略

Resource allocation strategy in cellular networks based on total energy efficiency guarantee for D2D users

在基于终端直连(D2D)通信的蜂窝网络中,文章提出了一种基于D2D用户能量效率保证的资源分配策略,我们的目标是尽量增大系统传输速率,并在同一时间,保证目标D2D用户能量效率。在文章提出的策略的第一阶段,采用加权二分匹配算法最大化系统传输速率,在目标D2D用户能效需求较低时,一阶段也可以满足需求,但D2D用户总能效需求变高时就需要进入第二阶段。因此,在第二阶段,先利用加权二分匹配算法最大化D2D用户能效并得到初始复用策略,然后使用局部搜索技术来改善初始复用策略。仿真结果表明,与已存在的基准策略相比,所提出的策略能够保证D2D用户能效并获得较高的系统传输速率性能收益。

In cellular networks based on Device-to-Device(D2D)communication,we propose a resource allocation strategy based on total energy efficiency guarantee for D2D users.Our goal is to maximize the systcm transmission rate and,at the same timc,guarantee the total energy efficiency of the target D2D users.In the first phase of our proposed strategy,a weighted bisection matching algorithm is used to maximize the system transmission rate,and the demand can be satisficd in the first phase even when the targct D2D user total cncrgy efficicncy demand is low,but it is nccssary to go to the sccond phasc when the D2D uscer total cncrgy efficicncy demand becomes high.Therefore,in the second phase,we first use the weighted bisection matching algorithm to maximize the D2D user total energy efficiency and obtain the initial reuse strategy,and then use the local search techniquc to improve the initial rcuse strategy.Simulation results show that the proposed policy can guarantee the D2D user total energy efficiency and obtain a higher system transmission rate performance gain compared to the existing benchmark policy.