Research On D2D Communication Resource Allocation Algorithm In Mobile Communication

With the speedy development of mobile communication,thus,it entered an era of "Interconnection of All Things".The description and quantum smart devices have grown rapidly.As a result of the communication traffic is growing rapidly,the need for spectrum resources becomes greater.For alleviate the problem of massive explosive growth of equipment's demand for frequency spectrum resources,scholars proposed the Terminal pass-through(D2D)technology.Its core technology is that it can realize direct communication between neighboring users without the base station as a repeat,and it can also be applied to empowered frequency bands.In addition,the spectrum utilization rate of the system has been greatly improved,so it has turn into a research hotspot in recent years.This article is a research on the D2 D communication resource allocation algorithm in mobile communication,and achieves that user can still correspond normally in the cellular network with the introduction of D2 D communication technology.In D2 D communication,its D2 D user can communicate with the resources of the uplink cell user,or get past the resources of the downlink cell user.For regulate the interference in the system more valid,this paper focuses on the case of D2 D users using uplink cellular user resources,and uses one-to-one and many to one or two allocation methods,and then proposes two resource allocation schemes.(1)In the case where the number of cellular users in a single cell is higher than the quantity of pairs of D2 D users,a resource allocation scheme based on maximizing access rate under one-to-one allocation mode is proposed.This scheme first establishes the objective function of minimum interference through the interference existing in the system,then selects the mode through the interference,and finally uses Hungarian algorithm to match the channel set that selects the multiplexing mode.In the end,the system achieves the goal of the least interference to users and the most D2 D users accessing to the system.(2)In a scenario where the number of cellular users in a single cell does more than or even far less than the number of pairs of D2 D users.Using a many-to-one allocation method,a D2 D graph coloring resource allocation algorithm based on improved fairness is proposed.Firstly,the interference graph is established through the interference in the network system.Then,the interference graph is used to establish a multiplexing set for each D2 D user waiting to access the system.Finally,calculate the priority of D2 D users,and according to the multiplexing set and priority level,the resource allocation algorithm that performs graph coloring for D2 D users is allocated for resource distribution.So then,the fairness of users' obtain to resources get enhance,and the function of the system is improved.The simulation results indicate that the two resource allocation schemes proposed in this paper under the one-to-one as well as many-to-one allocation modes.All of them can improve the access rate of D2 D users and the performance of the system while guaranteeing the system throughput.