蜂窝与D2D混合网络中的无线资源分配

针对蜂窝与终端直通（D2D）混合网络中的资源分配，将其建模为以最大化网络吞吐量为目标，关于蜂窝用户与D2D用户资源的联合优化问题。基于该模型进一步提出一种两阶段资源分配策略，即先采用改进的贪婪频谱分配算法将资源块分配给用户，然后基于对偶分解理论给每个资源块分配最优的传输功率。该算法在考虑蜂窝用户服务质量（QoS）的基础上，不再限制每个资源块上的D2D用户数目以及D2D用户可复用的资源数。仿真结果表明，所提算法在保证蜂窝用户速率性能的前提下，有效地提升了系统的整体容量。 

Radio Resource Allocation for Cellular and Device-to-Device Communication Hybrid Networks

For the solution of resource allocation in the cellular and D2D communication hybrid networks could be formulated into an optimization problem with the objective of maximizing network throughput, a two-step resource allocation scheme was further designed based on this model. First, the resource blocks were assigned to the users with an improved greedy spectrum allocation algorithm. And then, the dual-decomposition based algorithm was employed to allocate optimal transmission power for each resource block. Moreover, based on consideration of QoS requirement for cellular users, the proposed algorithm no longer restricted the number of D2D users on each resource block and resources reused by D2D user. The simulation results show that, the proposed algorithm makes an effective improvement in capacity of whole system while still retains the rate of cellular users.