Research On Resource Allocation Of Dense D2D Communication In Cellular Network

With the development of communication network,there is always a need to increase network capacity to accommodate the growing rate.In both dense and complex scenario,a more flexible approach to spectrum utilization is considered to meet the increasing demand for transmission.D2D communication(device-to-device communication)is an effective means of achieving high performance in such heterogeneous networks.As the network architecture,business scenarios and requirements of the D2D network become more complicated,the problem of interference and resource allocation is extremely prominent,which poses a severe challenge to the interference management and control in the network.In this paper,we focus on the following three aspects to solve the problems caused by complex interference:Interference dynamics,excessive overhead,interference with Macrocell users.First of all,we systematically research and simulate the D2D resource scheduling scheme in the Ideal CSMA(carrier-sense multi-access)Network,laying a solid foundation for solving the problem of interference dynamics and excessive base station overhead.In addition,the resource allocation algorithm of Stackelberg Game is introduced into the cellular network system.After considering the interference of the D2D to the base station,the problem of interference to the macrocell users is expected to be solved.Secondly,this paper analyzes the resource scheduling of optimal throughput under D2D network and proposes the concept of Maximal Weight Independent Set.Through designing weights and distributed selection algorithms,we find the independent set that maximizes the network capacity.The whole design is based on the distributed algorithm,which can better solve the problem of disturbance dynamics.The main research contents and innovations are as follows:Based on the ideal CSMA network,the user requirement function and the convergence mode are modified,and the Stackelberg game is introduced on the interference of the D2D to the macro cell user.The concept that the base station charges the interference of surrounding D2D users is proposed to make a reasonable trade-off between network capacity and interference to the base station;The concept of Maximum Weight Independent Set is proposed.The throughput of D2D users is maximal under the premise of protecting the communication quality of cellular subscribers through the weight design;Based on the independent set with the maximum weight,a scheduling scheme based on round robin of time slots is proposed to improve the network coverage and fairness.