蜂窝网络下设备到设备通信中的联合资源优化

在蜂窝与设备到设备通信混合网络下,把设备到设备通信的系统吞吐量作为优化目标,同时考虑设备到设备链路和蜂窝链路的服务质量,提出了一种联合功率控制和信道分配的优化方案. 在该方案中,信道分配部分采用粒子群优化算法,并在功率控制部分的帮助下来为设备到设备链路分配最优的复用信道;功率控制部分针对信道分配部分给定的信道分配,通过优化链路发射功率来最大化系统吞吐量. 仿真结果表明,所提联合优化方案权衡了系统吞吐量和接入链路数性能之间的折中关系,在保证所有接入链路服务质量的前提下提升了系统整体性能.

Joint Resource Allocation for Device-to-Device Communication Underlaying Cellular Networks

For hybrid cellular network with underlaid device-to-device (D2D) communications, a joint power control and channel assignment optimization scheme was proposed for D2D communications. The system throughput of D2D communications was explicitly set as the optimization target together with the consideration for individual quality of service (QoS) requirement of both D2D links and cellular links. In this scheme, the power control part was dedicated to maximize system throughput under given channel as-signment from channel assignment part, and channel assignment part adopts particle swarm optimization algorithm to obtain the optimal channel assignment for D2D links with help of power control part. It is shown that the proposed scheme will leverage the tradeoff between system throughput and the number of admitted D2D links, and meanwhile improves the aggregate throughput on condition that the QoS require-ments of all admitted links are guaranteed.