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A study on a cooperative MAC protocol at Ad Hoc networks

Ad Hoc 네트워크에서 Cooperative MAC 프로토콜에 관한 연구

  • 장재신 (인제대학교 정보통신공학과)
  • Published : 2009.08.31

Abstract

Being different from traditional mobile communication networks or wireless LAN with access points, ad hoc network can provide direct communications between homogeneous stations. Thus, it can be considered as a much advanced network. Somehow, many researches have been done to enhance system performance of ad hoc networks up to now, one of which is cooperative communications. In this paper, a cooperative MAC protocol, called CO-MAC protocol, is proposed and its performance is evaluated with a mathematical approach. Numerical results show that this scheme provides more enhanced system throughput especially when frame transmission error probability is high than DCF scheme, which is the key protocol in IEEE 802.11 standard, and rDCF scheme.

Ad Hoc 네트워크는 이동통신망이나 AP (access point)와 통신하는 무선 랜과는 달리 유사한 특징을 가진 모든 단말들이 무선채널을 통해 직접 통신하는 좀 더 진화된 통신망이 라고 할 수 있다. Ad Hoc 네트워크에서 시스템 성능을 높이려는 다양한 연구가 진행되고 있는데 그 중의 하나가 Cooperative 통신이라고 할 수 있다. 본 연구에서는 Cooperative 통신을 실현할 수 있는 CO-MAC 프로토콜을 제안하고, 수학식을 사용하여 성능평가를 수행하였다. 도출된 성능평가 결과를 통해 IEEE 802.11 표준인 DCF 기법, 그리고 기존 연구에서 제안된 rDCF 기법과 성능비교를 통해 프레임 전송오류 확률이 증가할 때 시스템 처리량이 많이 개선됨을 확인할 수 있었다.

Keywords

References

  1. IETF MANET Working Group. Available from:
  2. IEEE std 802.11-1997, part 11: Wireless LAN medium access control (MAC) and physical layer (PHY) specifications, June 1997
  3. G. Holland, N. Vaidya, and P. Bahl, "A rate-adaptive MAC protocol for multi-hop wireless networks", in Proc. of ACM/IEEE MOBICOM'2001, Italy, June 2001
  4. H. Zhu and G. Cao, "On improving the performance of IEEE 802.11 with relay-enabled PCF," Mobile networks and applications, vol. 9, pp. 423~434, 2004 https://doi.org/10.1023/B:MONE.0000031608.10301.18
  5. Sai Shankar N, Chun-Ting Chou, and Monisha Ghosh, "Cooperative communication MAC (CMAC) - A new MAC protocol for next generation wireless LANs," in Proc. of IEEE Int. Conf. on Wireless Networks, Communications and Mobile Computing, Hawaii, June 2005
  6. M. Dianati, X. Ling, K. Naik, and X. Shen, "A node- cooperative ARQ scheme for wireless Ad Hoc Networks," IEEE Trans. on Vehi. Tech., Vol 55, No. 3, pp. 1032~1044, May 2006 https://doi.org/10.1109/TVT.2005.863426
  7. G. Yu, Z. Zhang, and P. Qiu, "Cooperative ARQ in wireless networks: Protocol description and performance analysis," IEEE 2006
  8. H. Zhu and G. Cao, "rDCF: A relay-enabled medium access control protocol for wireless Ad Hoc Networks," IEEE Trans. on Mobile Computing, Vol. 5, No. 9, pp. 1201~1214, September 2006 https://doi.org/10.1109/TMC.2006.137
  9. K. Tan, Z. Wan, H. Zhu and J. Andrian, "CODE: Cooperative medium access for multirate wireless Ad Hoc network," in Proc. of IEEE SECON'2007, 2007
  10. P. Liu, Z. Tao, S. Narayanan, T. Korakis, and S. S. Panwar, "CoopMAC: A cooperative MAC for wireless LANs," IEEE J. of Select. Areas, Vol. 25, No. 2, pp. 340 ~ 353, 2007 https://doi.org/10.1109/JSAC.2007.070210
  11. G. Bianchi, "Performance analysis of the IEEE 802.11 distributed coordination function," IEEE J. of Select. Areas, pp. 537~547, March 2000