Research On Resource Allocation Algorithm In D2D Communication System

As one of the key technologies of the 5G network,the D2D(Device-to-Device)communication technology allows adjacent users in the cellular network to communicate with each other directly,which can effectively reduce the load of the base station and improve the performance of the wireless network.D2 D users reuse Licensed Spectrum in cellular networks to communicate with others,thus it could improve the spectral efficiency.Therefore,introducing D2 D communication technology can improve the performance of the wireless network effectively.However,there is much interference between users caused by spectrum multiplexing in the D2 D communication network,it is necessary to design an efficient resource allocation algorithm to solve the problem.In the thesis,the scenario of D2 D users sharing spectrum resource with cellular user is mainly considered.And mainly solved the problem of resource allocation in the D2 D communication network.Firstly,analyze and investigate the D2 D communication networks,its network architecture,working mode and application scenarios,carry out the research about the application of matching theory in wireless resource allocation and pave the way for designing a resource allocation algorithm for D2 D networks.Secondly,considering the scenario that a single D2 D user shares spectrum resource with a single cellular user,so design a resource allocation algorithm based on "one-to-one" matching theory for the interference between D2 D users and cellular users which multiplex spectrum resources in the network.That could reduce the interference between D2 D users and cellular users and improving the network performance.Finally,study and analyze the resource allocation problem in the scenario that multiple D2 D users sharing spectrum scenarios with a single cellular user.It not only considers the interference between cellular users and D2 D users,but also considers the interference between different D2 D users which use the same frequency band.The resource allocation algorithm based on the one-to-many matching theory is proposed to implement interference management among users efficiently,and it may optimize the resource allocation in the D2 D communication system.Through the research of D2 D communication system,the resource allocation algorithms based on matching theory for the resource allocation problem are proposed,the scenarios of which are about a single D2 D user pair sharing thespectrum resource with a single cellular user and multiple D2 D user pairs sharing the spectrum resource with a single cellular use.The investigation will optimize the performance of the D2 D communication network in a great degree.