Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Efficient Channel Assignment Scheme in HiperLAN/2 WLAN

HiperLAN/2 무선랜에서 효율적인 채널할당방안

  • Lim, Seog-Ku (Division of Information Communication, Beakseok University)
  • 임석구 (백석대학교 정보통신학부)
  • Received : 2011.05.19
  • Accepted : 2011.08.11
  • Published : 2011.08.31
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Abstract

The MAC protocol of HiperLAN/2 is based on TDMA/TDD. The radio channels are assigned by AP(Access Point) that is centrally operated. Mobile terminal that data transmission is necessary to uplink requests radio resource to AP through RCH channels. The changing number of RCHs in each MAC frame is important because too many RCHs may result in a waste of radio resources and too few RCHs may result in many access collisions and prolong time that connect to AP. Therefore, number of RCH should be allocated properly according to traffic. From these viewpoints, this paper proposes an advanced scheme that dynamically changed the number of RCH which is based on the number of success and collision of RR message in previous MAC frame. To prove efficiency of proposed scheme, lots of simulations are conducted and analyzed.

HiperLAN/2에서의 MAC 프로토콜은 TDMA/TDD을 기반으로 하며, 무선채널은 중앙제어방식으로 운영되는 AP에 의해서 할당된다. 상향링크로 데이터 전송이 필요한 MT는 RCH 채널을 통하여 AP에게 무선자원을 요청한다. 각 MAC 프레임마다 RCH 수를 동적으로 변경하는 것이 중요한데, RCH 수가 많이 할당되면 무선자원의 낭비를 초래하며, RCH 수가 적게 할당되면 MT간의 충돌이 증가하고 AP에 접속하는 시간도 길어진다. 따라서 RCH 수는 트래픽에 따라 적절하게 할당되어야 한다. 이러한 관점에서 본 논문에서는 이전 MAC 프레임에서 RR 메시지 전송에 성공한 회수와 실패한 회수를 기반으로 RCH 수를 동적으로 변화시키는 방안을 제안하였다. 제안한 방안의 효율성을 입증하기 위해 시뮬레이션을 수행하여 분석하였다.

Keywords

References

  1. The Editors of IEEE 802.11. IEEE Standard for Wireless LAN Medium Access Control(MAC) and Physical Layer(PHY) specifications, Nov. 1997.
  2. "HIPERLAN Type 2; Data Link Control(DLC) Layer; Part 1: Basic Data Transport Functions", ETSI TS 101 761-1, Nov. 2000.
  3. S. Simoens, P. Pellati, J. Gosteau, K. Gosse, Ch. Ware, "The evolution of 5GHz WLAN toward higher throughputs", IEEE Wireless Communications, pp. 6-13, Dec. 2003. https://doi.org/10.1109/MWC.2003.1265847
  4. G. H. Hwang and D. H. Cho, "Adaptive Random Channel Allocation Scheme in HIPERLAN Type 2", IEEE Communications Letters, Vol. 6, No. 1, pp. 40-42, Jan., 2002. https://doi.org/10.1109/4234.975494
  5. K. O. Cho, C. Park and J. K. Lee, "Performance Evaluation of the HIPERLAN Type 2 Media Access Control Protocol", Journal of the Korean Institute of Communication Science, Vol. 28 No. 1B, pp.11-17, Jan. 2003.
  6. E. S. Hwang, Y. C. Ko, S. Q. Lee, C. S. Yoon, H. W. Lee and C. H. Cho, "Random Channel Allocation Scheme Based on Split Algorithm in HIPERLAN 2" Journal of the Korean Institute of Communication Science, Vol.28, No 9A, pp.717-727, Sep. 2003.
  7. J. E. Kang and J. K. Lee, "Dynamic Random Channel Allocation Algorithm by Limiting the Number of Minimum RCH in HIPERLAN/2", Journal of the Korean Institute of Communication Science, Vol. 34, No. 1, pp.58-64, Jan. 2009.
  8. A. Alan B. Pritsker, "Introduction to Simulation and SLAM II", John Wiley & Sons, 1986.
  9. D. G. Jeong and W. S. Jeon, "Performance of an exponential backoff scheme for slotted-ALOHA protocol in local wireless environment," IEEE Trans. Vehicular Technology, Vol. 44, pp. 470-479, Aug. 1995. https://doi.org/10.1109/25.406614