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End-to-End QoS Enhancement in Mobile WiMAX Systems  

Choo, Sang-Min (아주대학교 전자공학과)
Oh, Sung-Min (아주대학교 전자공학과)
Cho, Sung-Hyun (한세대학교 IT학부)
Kim, Jae-Hyun (아주대학교 전자공학과)
Publication Information
Journal of KIISE:Information Networking / v.35, no.5, 2008 , pp. 415-424 More about this Journal
Abstract
In this paper, we compare the QoS performance enhancement schemes according to the network architecture of mobile WiMAX system in order to improve the end-to-end QoS performance and propose QoS parameter mapping method and IP packet scheduling algorithm. To evaluate the end-to-end QoS performance, we implemented an end-to-end simulator of mobile WiMAX system using OPNET. Simulation results show that the proposed QoS parameter mapping scheme reduces the average delay of VoIP packet and improves uplink resource efficiency. And also, when the proposed IP packet scheduling algorithm is applied to the system, the end-to-end packet transmission delay of VoIP service can be reduced by 44-67 percent compared to FIFO and WRR scheduler.
Keywords
Mobile WiMAX; End-to-End QoS; Cross-Layer Interworking; QoS Parameter Mapping; IP Packet Scheduler;
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