The Dynamic Resource Allocation Algorithm Research Of OFDMA

its low ISI,anti-frequency selective fading and high spectral efficiency advantages,Orthogonal Frequency-Division Multiplexing Access,(OFDMA)Technology has been chosen as the core technology in LTE downlink system. In recent years, with the rapid development of LTE system, a more diverse and complex mobile communications business come out one after another.The development from voice services to a single SMS of low-speed data services and to be now optional multimedia services. The current OFDMA resource allocation algorithm presented new challenges.It requires that we not only ensure high resource utilization and fairness among users, but also take care of business Quality of Service. In response to business needs, this paper focuses on the system based on OFDMA resource allocation algorithm.The paper firstly describes the orthogonal frequency division multiplexing (OFDM), describes the OFDM and OFDMA technologies and the relationship between LTE systems and Network architecture of LTE system. Provide a theoretical basis for the LTE system level simulation platform building later. Combine the characteristics of wireless communication systems analysis and the importance of radio resource management techniques in wireless packet scheduling management of critical resources. Through the wireless communication system in the resource packet scheduling technology division, scheduler and scheduling process, scheduling options and other in-depth analysis of the resource scheduling in packet scheduling important role.Then the packet scheduling algorithm performance on resource evaluation criteria, grouping of several classical scheduling algorithms to achieve the simulation.The simulation results in accordance with evaluation criteria to make a comparative analysis of several algorithms, obtained several classical scheduling algorithms and performance scope of application.After the mixture used in the business of scheduling principle is analyzed, the utility function of the constraint analysis system is introduced, through the utility function of the most effective model analysis and mathematical derivation, presents a QoS guarantee for the purpose of real-time service and non-real-time service mixed service scheduling algorithm, and in the LTE system level simulation platform through the simulation results validate the performance of the algorithm, the algorithm examines the advantages and the disadvantages of suitable environment.