基于时隙和功率分配的联合优化算法

Joint Time and Power Allocation Optimization Algorithm

能效是支持设备到设备通信(device-to-device,D2D)的蜂窝网络的关键性能。在每个D2D群内有一个发射设备和两个接收设备。发射设备从基站广播的信号采集能量,再利用所采集的能量向接收设备传输数据。提出基于时隙和功率分配的联合优化算法(joint time and power allocation optimization,JTAO)。通过优化采集能量和传输数据的时隙以及发射功率,最大化能效。发射设备采用非正交多址接入技术,降低用户间干扰。性能分析表明,通过优化发射设备的传输功率,提升用户能效。

Energy efficiency is the key performance of cellular networks that support D2D communication.There is one transmitter and two receivers in each D2D group.The transmitter harvests energy from the broadcast signals from the base station and transmits the data to the transmitter with the harvested energy.Therefore,a joint optimization algorithm based on time slot and power allocation(JTAO)is proposed.Energy efficiency is maximized by optimizing time slots for energy harvesting and data transmission,as well as transmitting power.At the same time,the transmitter adopts non-orthogonal multiple access technology to reduce the interference between users.The performance analysis shows that the network energy efficiency can be improved by optimizing the transmission power of transmitter.