Journal of Digital Contents Society (디지털콘텐츠학회 논문지)

Digital Contents Society (한국디지털콘텐츠학회)
권호 표지
DOI QR코드

DOI QR Code

Dynamic Carrier Sensing Threshold Scheme based on SINR for Throughput Improvement in MANET

MANET에서 처리율 향상을 위한 SINR 기반 동적 캐리어 감지 임계값 방법

  • 이현노 (강원대학교 IT대학 전자통신공학과) ;
  • 김동회 (강원대학교 IT대학 전자통신공학과)
  • Received : 2013.12.27
  • Accepted : 2014.02.20
  • Published : 2014.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

IEEE 802.11 WLAN uses CSMA/CA(Carrier Sense Multiple Access/Collision Avoidance) method in MAC(Media Access Control) protocol, and through the carrier sense checks whether other users use the channel during the data transmission to avoid the data collision. Currently, IEEE 802.11 standard recommends the use of a fixed threshold which gives an impact on carrier sensing range. However, the existing scheme using the fixed threshold causes the operation of network to be inefficiency owing to the mobility in MANET(Mobile Ad hoc NETwork). In this paper, we found the better network throughput to be obtained by applying the proposed scheme, which chooses properly the carrier sensing threshold and transmission rate considering SINR(Signal to Interference-plus-Noise Ratio), to the MANET.

IEEE 802.11 무선랜은 CSMA/CA(Carrier Sense Multiple Access/Collision Avoidance) 방식의 MAC(Media Access Control) 프로토콜을 사용하며, 데이터 충돌을 회피하기 위하여 데이터 전송 시 다른 사용자가 채널을 사용하고 있는지를 캐리어 감지를 통해 확인하게 된다. 현재 IEEE 802.11 표준에서는 캐리어 감지 범위에 영향을 주는 임계값을 일정한 고정 값으로 운용을 하고 있는데, 모바일 Ad-hoc 네트워크와 같이 이동성으로 인해 가변성이 큰 경우에는 고정 특정 캐리어 감지 임계값으로는 효율적인 네트워크 운영이 어렵다. 본 논문에서는 신호대간섭잡음비를 고려하여 캐리어 감지 임계값과 전송속도를 적절히 선택하는 제안된 SINR 기반 동적 캐리어 감지 임계값 방법을 모바일 Ad-hoc 네트워크 환경에 맞게 운영을 함으로써 더 좋은 네트워크 처리율을 얻을 수 있음을 보여준다.

Keywords

References

  1. "IEEE standard for wireless LAN Medium Access Control (MAC) and physical layer (PHY) specifications", ISO/IEC 802-11:1999(E), August, 1999.
  2. Hyun-no Lee, Dong-hoi Kim, "Throughput analysis by Transmission rate and Carrier sense threshold", The conference proceedings of Digital Contents Society, Vol. 14, No. 1 pp. 47-49, Dec. 2013.
  3. The application of NS-2 Network Simulation, Young-Min Jang, Hongrung Publishing Company.
  4. Moses Kim, Jeonghoon Mo, "On the usefulness of RTS/CTS in wireless ad-hoc networks", KIISE 32th academic conference proceedings, Vol. 32, No. 2, 2005
  5. Woo-Yong Choi, "Optimal RTS-CTS Threshold to Maximize the Capacity of IEEE 802.11 WLAN" IE interface", Vol. 16, No. 2 pp. 195-200, June 2003.
  6. Xjing Zhu, Singang Guo and L.Lily Yang, "Leveraging Spatial Reuse in 802.11 Mesh Networks with Enhanced Physical Carrier Sensing", IEEE International Conference, Vol. 7, pp. 4004-4011, 20-24 June 2004.
  7. Xue Yang, Vaidya, N "On physical carrier sensing in wireless ad hoc networks", Infocom '05 24th Annual Joint Conference of the IEEE Computer and Communications Societies, Vol. 4, pp. 2525-2535, 13-17 March 2005.
  8. Tae-Suk Kim, Hyun Lim and Jennifer C. Hou, "Improving spatial reuse through tuning transmit power, carier sense threshold, and data rate in multihop wireless networks", Mobicom '06 Proceedings of the 12th annual international conference on Mobile Computing and networking, pp. 366-377, 2006.
  9. Yong Yang, Hou J. C and Lu-Chuan Kung, "Modeling the Effect of Transmit Power and Physical Carrier Sense in Multi-Hop Wireless Networks", 26th IEEE International Conference on Computer Communications IEEE, pp. 2331-2335, 6-12, May 2007.
  10. Seok-Gu Lim, "Comparison Analysis of Packet Delay Model in IEEE 802.11 Wireless Network", Journal of Digital Contents Society, Vol. 9, No. 4, pp. 679-6 86, Dec. 2008.
  11. Sung-Eun Kim, "Dynamic Adjustment of Carrier Sensing Range for Wireless Ad-hoc Networks", KyungHee University, Academic Thesis, Aug. 2007.