Studies On Interference Management For Full Duplex Device-to-device Comunication Based On Power Control

With the rapid development of wireless communication techniques,the existed cellular networks are becoming increasingly difficult to meet the customers' exponentially growing data traffic demand.In order to deal with the latency of spectrum resources,improving the spectrum efficiency becomes a focus of 5G wireless communication system.Meanwhile,with the emergence of varieties of multimedia applications,the energy consumption of user equipment is also an important issue.“Green Communication” will become the development trend in the future.Recently,the concept of full-duplex(FD)Devcie-to-Device(D2D)communication has been proposed by introducing FD communication technology into D2D communication.FD D2D communication not only has the advantages of short-range communication,but also can simultaneously transmit and receive signals in the same frequency band.Moreover,it can improve the network spectrum efficiency,increase the coverage of network and reduce the transmission delay.However,how to effectively deal with the mutual interference between users and improve the FD D2D communication performance is an important issue in multi-layer,high-density 5G wireless networks.Based on the research of FD D2D communication,this paper focuses on the interference management of FD D2D communication in cellular networks by power control.In order to deal with the shortage of spectrum resources,and to respond to the call of “Green Communication”,we propose the corresponding user power control algorithm from the aspects of frequency efficiency and system energy efficiency of FD D2D communication.The concrete research contents are as follows:In order to improve the spectral efficiency of FD D2D communication,we propose a FD D2D spectrum efficiency optimal power control algorithm.Considering that the communication of the cellular users in the network usually has a higher priority,our optimization target is to maximize the spectrum efficiency of the FD D2D communication while ensuring the quality of service(QoS)of the cellular users.Simulation results show that the spectrum efficiency of FD D2D communication will be much better than that of HD D2D communication in the case that self-interference can be effectively suppressed.In order to improve the system energy efficiency of FD D2D communication,we propose a FD D2D energy-efficient power control algorithm.Since the original optimization problem is a non-convex problem with nonlinear fractional form,it is difficult to solve it directly.We transform the original problem by Dinkelbach algorithm and nonconvex-convex transformation,and finally solve it.Our proposed algorithm can maximize the system energy efficiency of FD D2D communications while maintaining the minimum rate requirements of all users in the network.