Research On 5G Wireless Network Interference Management And Spectrum Allocation

With the 5th Generation Mobile Communication Technology research and development carried out in full swing,network capacity compared is expected to increase at least 1,000 times by 2020 in order to meet future communication requirements,the new technology development is imperative.In the 5G wireless network,D2D(Device to Device)small cells communications and ultra-dense deployments become two hot topics.However,the interference caused by D2 D user multiplexing cellular network resources and small cells in ultra-dense interfere with each other becomes enormous challenges in 5G wireless.At present,most of the existing interference management and spectrum allocation methods are dedicated to the single user under the same base station,few literature study multi-user and ultra-dense distribution,this paper mainly for 5G network using the SA(Student Admission)algorithm of marriage matching and simulated annealing algorithm to solve the problem of interference and spectrum allocation.The main contents are as follows:First,D2 D communication is mainly in the conventional cellular network,D2 D users multiplexing cellular network resources caused internal interference,we find the optimal stable matching between resource blocks and D2 D users by the use of SA algorithm of one to many matching algorithm,so that we can solve interference between cellular and D2 D users while increase the throughput of the network.And then try to make maximize energy efficiency while meeting quality of service of D2 D and cellular users,spectrum efficiency and saving energy.Secondly,there is huge interference between small-cell base stations in the ultra-small dense cellular networks.According to the SNR requirement,small-cell base stations are divided into a collection of interference tolerable and intolerable interference set of base stations.Then we create the interference matrix between the users and get undirected graph of interference relationship,and finally found the largest group(the maximum number of users multiplexing network resources)in the figure avoiding interference.To find the largest group,we use improved simulated annealing algorithm,and then allocate resources according to the final number of the largest group enhancing the spectral efficiency of the network.Finally,in 5G wireless network,simulation experiment and analysis are presented in D2 D communications and ultra-dense small-cell interference management algorithm.