Research On Of DMA Resource Allocation And Scheduling In Multi-Cell System

The biggest characteristic of future mobile communication is the ability to provide a high transmission rate, increasing support various types of wireless communications applications with different QoS (Quality of Service, QOS) requirements. However, in broadband wireless communication system, a high transfer rate may cause serious frequency selective fading and inter-symbol interference (Inter Symbol Interference, ISI). Effective orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA) system resource allocation and scheduling algorithms can take advantage of spectrum resources and improve the transmission performance of the system and improve spectral efficiency. Now, it has become a important topic of OFDMA technique field.This thesis mainly based on the OFDMA systems theory, studies resource allocation and scheduling in the next generation of wireless communication network.Firstly, we studied Fractional Frequency Reuse (FFR) scheme and proposed Improved fractional Frequency Reuse (IFFR) scheme. The difference between the conventional frequency reuse scheme is that we divide the whole frequency into two parts for cell center users (CCUs)and cell edge users (CEUs), and CCUs can use the entire frequency. Secondly, we proposed the dynamic division method of user groups and then compare and sitimulate the static division method and dynamic division method. Finally, based on the Hungarian algorithm, multi-cell OFDMA system resource allocation algorithm is proposed, and compare with the fair proportion algorithm. Simulation results show that the we can achieve higher throughput system based on the Hungarian algorithm.