Browse > Article

Adaptive EDCF for IEEE802.11e MAC Protocol  

Kim Kunsu (LG전자 정보기술연구소 DNT그룹)
Kim Beomjoon (LG전자 이동통신기술연구소 표준화그룹)
Park Jungshin (삼성전자 정보통신총괄 네트워크사업부)
Lee Jaiyong (연세대학교 전기전자공학과 고성능멀티미디어네트워크 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.1A, 2005 , pp. 62-69 More about this Journal
Abstract
Efforts for standardization of medium access control (MAC) protocol in IEEE802.11e have been made to support quality of service (QoS) in IEEE802.11e MAC protocol. Enhanced disoibuted coordination function (EDCF) of 802.11e MAC protocol is modified to support QoS for packets that have differentiated priority. However, EDCF still has the problem of throughput optimization and priority support. Therefore, we have proposed a scheme called adaptive EDCF for both supporting priority of packets and throughput optimization. We have derived the relation between the number of nodes and contention window size for throughput optimization. Based on the analytic results, we have evaluated the performance of the proposed scheme using OPNET simulations. The simulation results show that using the proposed scheme can improve the overall throughput regardless of the number of nodes and the decrement of the throughput with increasing the number of nodes can be alleviated. Additionally, we have shown that the adaptive EDCF can support priority of packets more effectively than existing EDCF.
Keywords
IEEE802.11; IEEE802.11e; EDCF; Qualtiy of Service(QoS);
Citations & Related Records
연도 인용수 순위
  • Reference
1 IEEE802.11e/D4.3, 'Draft Supplement to Standard for Telecommunications and Information Exchange Between Systems Part 11: Wireless Medium Access Control(MAC) and physical layer(PHY) specifications: Medium Access Control (MAC) Enhancements for Quality of Service(QoS). May. 2003.
2 F. Cali, M. Conti, and E. Gregori, 'Dynamic Tuning of the IEEE 802.11 Protocol to Achieve a Theoretical Throughput Limit.' IEEE/ACM Trans. Networking, vol. 8, no. 6, pp. 785-799, Dec. 2000   DOI   ScienceOn
3 Sunghyun Choi, Javier del Prado, Stefan Mangold, and Sai Shankar, 'IEEE 802.11e Contention-Based Channel Access (EDCF) Performance Evaluation,' in Proc. IEEE ICC'03, May 2003
4 IEEE WG, 'Part 11:Wireless LAN Medium Access Control (MAC) and Physical Layer(PHY) Specifications,' IEEE802.11 standard, 1999
5 N. H Vaiday, et aI, 'Distributed Fair Scheduling in a Wireless LAN,' in Proc. ACM Mobicom, Aug. 2000
6 G. Bianchi, L. Fratta, and M. Oliveri, 'Performance evaluation and enhancement of the CSMAjCA MAC protocol for 802.11 wireless LANs,' in Proc. PIMRC 1996, Taipei, Taiwan, pp. 392-396, Oct. 1996
7 D. Bertsekas and R. Gallager, 'Data Networks,' Englewood Cliffs, NJ, Prentice Hall, 1992