【摘要】 在终端直通D2D(Device-to-Device)链路密集分布的通信系统中,针对多条D2D链路复用相同频带资源产生的同频干扰问题,提出一种以用户为中心的联合接入控制和时域调度方法。区别于传统机制中优化系统吞吐量或能效等系统侧性能,以用户为中心,最大化在调度周期中满足服务质量需求的D2D链路数目。原问题可分解为两部分:接入控制部分为混合整数线性规划问题,属于NP-hard难题,提出一种逐级接入控制算法;基于上述结果,时域调度部分为convex-cardinality问题,同属NP-hard难题,设计一种启发式算法。仿真体现了以用户为中心资源优化的必要性并验证了所提算法的有效性。更多还原

【Abstract】 In the D2 D( Device-to-Device) link intensive communication system,multiple D2D links are multiplexed with the same frequency bandwidth,leading to the co-channel interference problem. Therefore,we propose a usercentric joint admission control( AC) and time scheduling( TS) scheme. In contrast to the conventional schemes of optimizing system throughput or energy efficiency,our user-centric scheme maximizes the number of admitted links with satisfied quality-of-service( QoS) requirements in each scheduling period. The original problem was divided into two parts: the AC subproblem and the TS subproblem. Particularly,the former part turned out to be mixed-integer linear programmings,which belong to NP-hard,so we propose a gradual AC scheme; based on the above results,time scheduling was part of the convex-cardinality problem and belong to the NP-hard problem,Thus,we design a heuristic algorithm. Simulations verify the necessity to perform user-centric optimization and illustrate the advantages of our proposed scheme.更多还原