Journal of KIISE:Information Networking (한국정보과학회논문지:정보통신)

Korean Institute of Information Scientists and Engineers (한국정보과학회)
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End-to-End QoS Enhancement in Mobile WiMAX Systems

모바일 와이맥스 시스템에서의 종단간 서비스 품질 향상

  • Published : 2008.10.15
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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.

본 논문에서는 종단간 QoS 성능 향상을 위해 모바일 와이맥스 시스템의 망 구조에 따른 성능 개선 방안에 대해 분석하고 그 중 계층간 QoS 파라미터 매핑과 IP 패킷 스케줄링 알고리즘을 제안한다. 종단간 QoS에 관한 성능 평가를 위해, OPNET을 이용하여 모바일 와이맥스 시스템의 종단간 시뮬레이터를 구현하였다. 시뮬레이션 결과에 의하면, 제안한 계층간 QoS 파라미터 매핑 기법을 이용한 경우 매체접근제어 계층에서의 VoIP 패킷 평균 지연이 감소하며 상향링크 자원 효율성이 향상되었고 제안한 IP 패킷스케줄링 알고리즘을 적용할 경우, VoIP 서비스의 종단간 패킷 평균 지연은 FIFO와 WRR 스케줄러보다 44%에서 67%정도까지 감소하였다.

Keywords

References

  1. IEEE Std 802.16e-2005, Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems, Feb. 2006
  2. T. Kwon, et al., "Design and implementation of a simulator based on a cross-layer protocol between MAC and PHY layers in a WiBro Compatible IEEE 802.16e OFDMA system," IEEE Commun. Mag., pp.136-146, Dec. 2005
  3. C. Cicconetti, et al., "Quality of Service Support in IEEE 802.16 Networks," IEEE Network, pp. 50-55, Mar. 2006
  4. A. Ghosh, D. Wolter, J. Andrews, and R. Chen, "Broadband wireless access with WiMAX/802.16: current performance benchmarks and future potential," IEEE Commun. Mag., pp. 129-136, Feb. 2005
  5. C. Hoymann, "Analysis and Performance Evaluation of the OFDM-based Metropolitan Area Network IEEE 802.16," Comp. Net., Vol.49, No.3, pp.341-363, Oct. 2005 https://doi.org/10.1016/j.comnet.2005.05.008
  6. WiMAX Forum NWG, WiMAX End-to-End Network System Architecture-Stage 2: Architecture Tenets, Reference Model and Reference Points, Dec. 2005
  7. 3GPP TR 23.882 v1.4.2, 3GPP System Architecture Evolution: Report on Technical Options and Conclusions (Release 7), Oct. 2006
  8. J.Chen, W.Jiao, andQ.Guo, "Providing integrated QoS control for IEEE 802.16 broadband wireless access systems," in Proc.VTC-2005 Fall, vol. 2, pp. 1254-1258, Sep. 2005
  9. S.Hong and O.Kwon, "Considerations for VoIP Services in IEEE 802.16 Broadband Wireless Access Systems," in Proc.VTC-2006 Spring, vol. 3, pp. 1226-1230, May. 2006
  10. 3GPP TR 25.853 v0.4.0, Delay Budget within the Access Stratum (Release 4), Mar. 2006
  11. C50-20010802-02,1xEv-DV Evaluation Methodology-Addendum, Jul. 2001