5G HetNet Resource Allocation And Interference Coordination Scheme Based On Cell Split

Mobile wireless communication network has undergone a leap-forward revolution from the first generation of voice services that only met the basics to the fourth generation that can support high-speed data transmission.With the development of the Internet of Things,the fourth generation of mobile communications is gradually unable to meet the needs of communication networks in various industries.In this urgent moment,the fifth generation mobile communication network has been put on the agenda by the industry and academia.Compared with the traditional hexagonal homogeneous cellular network architecture,the fifth generation mobile communication network will use an irregular Heterogeneous Network(HetNet)architecture.HetNet technology has many advantages that traditional cellular networks do not have,such as flexibility,high capacity and low cost.However,the implementation of HetNet will have many obstacles,one of which is the interference caused by the overlap of multi-layer cells.At the same time,Device to Device(D2D)devices are also an indispensable role in HetNet,and end-to-end terminals are generally energy-limited.Therefore,the D2D network's energy-capacity solution is also an important issue that needs to be solved in the fifthgeneration mobile network resource configuration.Firstly,based on the above phenomena,the thesis constructs a novel 3-layer HetNet model consisting of multi-user macro cell,single-user femto cell and D2D network.Each element in the network obeys the independent Poisson point process,and the macrocell users are divided into the macrocell center user and the macro cell edge user according to the macro cell partitioning factor.Combined with fraction frequency reuse technology,the frequency bands are divided accordingly.The macrocell center user and the small cell user share the one,and the macro cell edge user and the D2D network share the other frequency band.Through the mathematical derivation and simulation of the uplink signal coverage of each element in the network,the accuracy of the proposed formula is verified,which intuitively reflects the effective distance of the random distance between the serving BS and the first strong interference macro base station(BS).The proposed user classification scheme is advanced.Secondly,we consider the general generalization of D2D terminal energy-harvest scheme when D2D users share a channel set with users on the edge of macro cell.Energy-limited D2D transmitter using reverse channel power control technology harvests energy from radio frequency interference in downlink of cellular networks,establishes D2D link in uplink of cellular networks.The successful establishment of the D2D link needs to satisfy the receiver within a certain range of the transmitter and the D2D transmitter collects sufficient energy in the uplink transmission phase of the cellular network.The feasibility of D2D energy-saving and energy-harvesting scheme in the proposed HetNet resource configuration is verified by the derivation and simulation of the sufficient probability of harvesting enough energy for the D2D transmitter to construct the communication link.Finally,considering that if the D2D terminal does not exist in the HetNet,it is possible to wasting resources in the above scheme.Combine SFR in the network and apply the same cell split method to achieve better resource allocation.In this scheme,the macro cell center user and the small cell share a low power channel set,and the macro cell edge user enjoys another high power set.When the low power channel is fully loaded,some macro cell users access the high power channel set.Through mathematical derivation and simulation,it is found that HetNet using SFR technology realizes better resource allocation of the network under the same conditions.