Research Of Rapid Packet Scheduling Algorithm Based On Hsupa

High Speed Uplink Packet Access (HSUPA) is the evolution of WCDMA. The main object of HSUPA is to decrease the propagation delay in physical, increase the peak data transfer rate of user equipment, and improve the spectral efficiency of uplink and the throughput of the whole cell. As one of the HSUPA key techniques, the main objective of packet scheduler is to maximize the throughput of the cell and ensure the tradeoff between throughput and fairness. Based on the original proportional fairness (PF) scheduling algorithm, the dissertation puts forward the multi-service proportional fairness scheduling algorithm based on the traffic QoS to increase the system throughput and guarantee the user fairness.The research work in this thesis is implemented through computer simulations. The whole thesis is organized as follows. Firstly, based on the characteristic of HSUPA, the paper constructs the model of link-level simulation and system-level simulation platform are set up. Via the simulation platform, the performance of HSUPA can be analyzed. Secondly, the theory of packet schedule is introduced, and scheduling principle of the classical packet scheduling algorithms are also studied intensively. The performances of the above algorithms are simulated and analyzed based on the simulation platform. Finally, aiming at the defect of original PF scheduling algorithm, the paper proposes the multi-service PF algorithm is proposed based on QoS. The simulation experiments of the modified algorithm are performed to obtain data result. The pros and cons of the original PF algorithm and modified PF algorithms are analyzed and compared at last.The simulation results show that the performances of the modified PF algorithm, such as system throughput, user average throughput and user fairness, are improved obviously compared to the original PF algorithm,. Especially in the multi-service system, the performances of the modified PF algorithms are superior to the original PF algorithm because of the QoS weight factor, which is contained in modified PF algorithm.Besides of the simulation, both of the hardware platform based on MSC8156 DSP and the software platform by using Eclipse are constructed in this thesis. The test results show that, in cases of 2ms and 10ms, the cell throughput based on hardware platform is the same as the simulation. It indicates that the hardware platform based on MSC8156 DSP can meet the requirement of HSUPA.