Research On Terminal State Driven Energy Efficiency Oriented Resource Management For Millimeter Wave Communication

In millimeter wave(mm Wave)communication systems,directional transmission technology and network densification technology that supports beamforming are usually used to reduce the high path loss of mm Wave and improve the coverage quality of mm Wave signals.However,the combined use of these two technologies will bring new challenges to mm Wave communication resource management.At the same time,the state of the cellular terminal will also affect the design of the mm Wave communication resource management scheme.This paper mainly considers two application scenarios of stationary and mobile cellular terminals,and proposes a mm Wave communication resource management algorithms that can adapt to the scale expansion of cellular terminals.The purpose of the dissertation is to improve the energy efficiency of unit mm Wave communication resources,and the main contributions are as follows:(1)For the application scenario of stationary cellular terminals,a hierarchical beamforming training(BFT)mechanism is firstly proposed to quickly establish directional mm Wave links for large-scale terminals.Compared with existing related mechanisms,this mechanism allows all small cell base stations(SBSs)to participate in the merging of training frames to improve the adaptability to network scale expansion.Then,a BFT information-assisted wireless communication resource allocation algorithm is proposed to improve the downlink energy efficiency of the entire mm Wave cellular network by reasonably selecting the beam direction,optimizing the transmit power and beam width.Compared with the existing related algorithms,the proposed algorithm determines the priority of concurrent use according to the link energy efficiency performance obtained by the BFT mechanism,which can improve the energy efficiency of the system.(2)Aiming at the application scenario of cellular terminal movement,a relay selection algorithm is proposed to select a reliable non-mobile relay node.The relay node receives data from the base station and forwards it to the mobile terminal,so as to solve the problem of system performance degradation caused by the movement of the terminal.The proposed relay selection algorithm can ensure the selection of the relay node as close as possible to the position of the terminal before moving.At the same time,the Device-to-Device(D2D)technology is used to connect the selected relay node with the moving terminal,so as to realize the reception of the data forwarded by the relay node.The resource allocation problem of concurrent D2 D links is modeled as a non-cooperative game problem,so as to realize the reasonable allocation of the transmit power of each relay node.In addition,by considering the contribution of relay nodes and giving rewards in the allocation of wireless access resources assisted by BFT information,idle nodes can be motivated to participate in relay tasks.(3)The simulation results show that,compared with the existing BFT mechanism,the proposed hierarchical BFT mechanism has a smaller BFT overhead,and the proposed BFT information-assisted wireless access resource allocation algorithms are better than the existing works in terms of average energy efficiency and unit link throughput.At the same time,the proposed relay selection algorithm,D2 D link resource allocation algorithm based on non-cooperative game,and BFT information-assisted wireless access resource allocation algorithm considering incentive mechanism can adapt to the application scenario of cellular terminal movement,which can suppress the sharp decline in performance caused by terminal movement.