HSDPA 시스템에서 Frame-Bundling을 채용한 VoIP 서비스 용량 평가

Capacity Evaluation of VoIP Service over HSDPA with Frame-Bundling

  • 황종윤 (연세대학교 전기전자공학과 통신시스템 연구실) ;
  • 김용석 (삼성전자 정보통신총괄 통신연구소) ;
  • 황금찬 (연세대학교 전기전자공학과 통신시스템 연구실)
  • 발행 : 2007.03.31

초록

본 논문에서는 고속 하향 패킷 접속 (high-speed downlink packet access: HSDPA) 시스템에서 상대적으로 큰 IP / UDP / RTP 계층의 오버헤더 (over-header) 효과를 줄일 수 있는 frame-bundling (FB) 기술을 채용한 IP기반 음성 (voice over internet protocol: VoIP) 서비스의 용량을 평가한다. 또한, VoIP 서비스를 제공하기 위한 수정된 비례 평등 (proportional fair: PF) scheduler를 소개한다. 본 연구의 주요한 관점은 FB가 무선 접속 시스템에서 허용 지연 기반의 시스템 outage에 미치는 영향을 관찰하는 것이다. 시스템 레벨 시뮬레이션을 수행한 결과로 부터 FB를 채용한 VoIP 서비스의 성능이 시스템의 허용 지연에 매우 민감함을 보인다. 또한, WCDMA (release'99)에 의해 사용되는 회선 교환 (circuit switching: CS) 방식의 음성서비스와 비교할 때 HSDPA에서 VoIP 서비스를 제공하는 것이 매우 효율적임을 보인다.

In this paper, we evaluate the capacity of voice over internet protocol (VoIP) services over high-speed downlink packet access (HSDPA), in which frame-bundling (FB) is incorporated to reduce the effect of relatively large headers in the IP/UDP/RTP layers. Also, a modified proportional pair (PF) packet scheduler design supporting for VoIP service is provided. The main focus of this work is the effect of FB on system outage based on delay budget in radio access networks. Simulation results show that VoIP system performance with FB scheme is highly sensitive to delay budget. We also conclude that HSDPA is attractive for transmission of VoIP if compared to the circuit switched (CS) voice that is used in WCDMA (Release'99).

키워드

참고문헌

  1. H. Holma and A. Toskala, WCDMA for UMTS, Third ed., John Wiley and Sons, 2004
  2. M. Lundevall, B. Olin, J. Olsson, J. Eriksson, and F. Eng, 'Streaming applications over HSDPA in mixed service scenarios,' IEEE Proc. VTC 2004, Fall, pp.841–845, 2004
  3. B. Douskalis, IP Telephone, Prentice-Hall, Englewood Cliffs, NJ, 2000
  4. W. Wang, S.C. Liew, and V.O.K. Li, 'Solutions to performance problems in VoIP over a 802.11 wireless LAN,' IEEE Trans. Veh. Technol., vol.54, no.1, pp.366–384, Jan. 2005
  5. Q. Bi, P.C. Chen, Y. Yang, and Q. Zhang, 'An analysis of VoIP service using 1xEV-DO revision a system,' IEEE J. Sel. Areas Commun., vol.24, no.1, pp.36–45, Jan. 2006
  6. B. Wang, K.I. Pedersen, T.E. Kolding, and P.E. Mogensen, 'Performance of VoIP on HSDPA,' IEEE Proc. VTC 2005, Spring, pp.2335-2339, 2005
  7. 3GPP TR 25.896, Feasibility Study for Enhanced Uplink for UTRA FDD
  8. 3GPP TS26.236, Packet switched conversational multimedia application; Transport protocols
  9. IETF RFC 3059, Attribute list extension for the service location protocol, Feb. 2001
  10. P. Viswanath, D. Tse, and R. Laroia, 'Opportunistic beamforming using dumb antennas,' IEEE Trans. Inf. Theory, vol.48, no.6, pp.1277-1294, June 2002 https://doi.org/10.1109/TIT.2002.1003822
  11. O. Komolafe and R. Gardne, 'Aggregation of VoIP Streams in a 3G Mobile Network: A Teletraffic Perspective,' Proc. EPMCC, 2003
  12. IETF RFC 4352, RTP Payload Format for the Extended Adaptive Multi- Rate Wideband (AMR-WB+) Audio Codec, January 2006
  13. ITU-T G.114, Transmission systems and media-General characteristics of international telephone connections and international telephone circuits
  14. 3GPP TR 25.853, Delay Budget within the Access Stratum
  15. 3GPP2 TSG-C.R1002-0, CDMA2000 Evaluation Methodology, version 1.0, 2004
  16. 3GPP TS25.308, UTRAN High Speed Downlink Packet Access: Overall Description
  17. 3GPP TS25.101, User Equipment radio transmission and reception (FDD)