Research On Resource Allocation And Scheduling Scheme Of Device-to-Device Communication In LTE Networks

Device-to-Device(D2D)underlying LTE network is a novel communication technology that mobile users communicate to each other directly without traversing the Evolved Node B(eNB)or core network.It shows significant advantages in enhancing network performance,such as improves spectrum efficiency,reduces communication delay,and increases overall system throughput.But D2D communication will also cause serious interference to the cellular network,so the necessary interference management technology is particularly important.In order to solve the interference problems,this thesis proposes two improved radio resource allocation schemes for oneto-one and many-to-one,respectively,to enhance the performance of cellular networks.For the one-to-one resource reusing scenarios,the scheme proposed in this thesis is Multi-Round Iteration Stable Matching(MRI SM)D2D resource allocation scheme.After Stable Matching is completed,this scheme will introduce the Multi-Round Iteration algorithm to further optimize matching twice or more,and then allocate more appropriate spectral resources to each D2D pair to maximize system throughput.Simulation analysis has shown that this scheme can effectively optimize the performance of D2D and improve the system throughput.For the many-to-one resource reusing scenarios,the other scheme proposed in this thesis is Dual Interference Limited Areas Clustering(DILA-Clustering)D2D resource allocation scheme.This scheme puts a cellular user as a cluster,then selects the appropriate cluster for each pair of D2D users based on interference limit area of cellular users and D2D users,finally allocates resource to each cluster.In this sheme,D2D users enter the cluster by means of freely refusing resource block that occupied by cellular users.There is no need to calculate the interference between D2D users repeatedly,this scheme greatly reduce the computational complexity.From the simulation results,it has demonstrated the proposed scheme which increases the ratio of the served D2D and the throughput of cellular network system.