Tham khảo tài liệu 'quality of service and resource allocation in wimaxfig part 10', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 216 Quality of Service and Resource Allocation in WiMAX NIST 2007 http NIST WiMAX 2007 http itl antd emntg 10 Evaluation of QoS and QoE in Mobile WIMAX - Systematic Approach Adam Flizikowski1 Marcin Przybyszewski2 Mateusz Majewski2 and Witold Hotubowicz3 University of Technology and Life Sciences Bydgoszcz 2ITTI Ltd. Poznan 3University of Adam Mickiewicz Poznan Poland 1. Introduction International standardization organizations responsible for preparing specifications such as IMT-Advanced for emerging 4G networks define requirements for system level simulations for the candidate technologies 1 2 . The goal behind those documents is to facilitate System-Level-Simulations by providing common methodology to perform such simulations . for WiMAX . According to 1 cell-level simulations can be an intermediate step between Link and System-level simulation where the capacity of a single cell and a single Base Station providing service for multiple users is evaluated by means of comprehensive tests. Still the IEEE standardized simulation methodology 1 does not specify how to evaluate WiMAX system capacity with various connection admission control mechanisms. Therefore as a first step we focus on the problem of adjusting simulation methodology to facilitate simulations covering CAC with Time Division Multiplexing Access scheme TDMA OFDM and uplink traffic. The applied evaluation methodology is derived from the best-practices in IEEE Evaluation Methodology Document and WiMAX Forum s System-Level-Simulation SLS methodology. Afterward the introduced methodology is utilized to find answers to the following problems To what extent does the capacity change when different FEC codes are deployed Convolutional Turbo Coding - CTC non binary Low-Density Parity-Check -nbLDPC What is the user perception of the service quality Quality of Experience - QoE and what are the differences in the system performance when different FEC codes are .
