| In the past few decades, the development of mobile communication has gone through three processes of wireless mobile,digital and wireless broadband. In order to meet the growing demand for data communication, LTE provides users with higher transmission rate, smaller data latency, lower cost and more simple user experience. From the perspective of the overall network performance LTE, excellent coverage and capacity is an important guarantee to meet the needs of users. In the factors that affect the LTE coverage and capacity, the interference coordination algorithm and scheduling algorithm plays a very important role.This thesis first introduces the network architecture and key technologies of LTE. Based on this theory, we focus on the Inter-Cell Interference Coordination technology and wireless resource scheduling algorithm. The traditional coordination algorithm and scheduling algorithm are studied. The traditional cell interference coordination mechanism for soft frequency reuse and fractional frequency reuse, although they meet the performance and fairness of the demand, but still in the presence of spectrum utilization rate is low, serious interference of cell edge users and other issues. In view of this, this thesis proposes an improved interference coordination algorithm based on the effective combination of scheduling algorithm from the point of time reuse according the interference of down-link and up-link. This improved algorithm can effectively solve the problem of cell interference since LTE was co-frequency network, and improve the throughput and frequency utilization of users.In order to verify the feasibility and effectiveness of the algorithm, this thesis has carried on the simulation to the proposed algorithm based on the LTE Matlab system level simulation platform. The simulation results(expected) show that the improved interference coordination algorithm proposed in this thesis can effectively solve the problem of inter cell interference, throughput and spectrum of utilization of the edge user are improved. |
