Open Access

Bandwidth Optimization in Centralized WLANs for Different Traffic Types

EURASIP Journal on Wireless Communications and Networking20072007:023917

DOI: 10.1155/2007/23917

Received: 31 May 2006

Accepted: 10 January 2007

Published: 29 March 2007

Abstract

Allocating bandwidth between different forms of coexisting traffic (such as web-browsing, streaming, and telephony) within a wireless LAN is a challenging and interesting problem. Centralized coordination functions in wireless LANs offer several advantages over distributed approaches, having the benefit of a system overview at the controller, but obtaining a stable configuration of bandwidth allocation for the system is nontrivial. We present, review, and compare different mechanisms to achieve this end, and a number of different means of obtaining the configurations themselves. We describe an analytical model of the system under consideration and present two mathematical approaches to derive solutions for any system configuration and deployment, along with an adaptive feedback-based solution. We also describe a comprehensive simulation-based model for the problem, and a prototype that allows comparison of these approaches. Our investigations demonstrate that a self-adaptive dynamic approach far outperforms any static scheme, and that using a mathematical model to produce the configurations themselves confers several advantages.

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Authors’ Affiliations

(1)
Telecommunications Research Laboratory, Toshiba Research Europe Ltd.

References

  1. IEEE (Institute of Electrical and Electronics Engineers) : IEEE Standard 802.11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications. 1999.Google Scholar
  2. Xiao Y: QoS guarantee and provisioning at the contention-based wireless MAC layer in the IEEE 802.11e wireless LANs. IEEE Wireless Communications 2006,13(1):14-21. 10.1109/MWC.2006.1593520View ArticleGoogle Scholar
  3. WiMedia-Alliance (Ecma International (Ecma)) : Standard ECMA-368 High Rate Ultra Wideband PHY and MAC Standard. 2005.http://www.wimedia.org/en/resources/eis.asp?id=resGoogle Scholar
  4. IEEE (Institute of Electrical and Electronics Engineers) : IEEE Standard 802.11e—Part 11 Amendment 8: Medium Access Control (MAC) Quality of Service Enhancements. 2005.Google Scholar
  5. Li C, Li J, Cai X: A study of self-adaptive transmission for integrated voice and data services over an IEEE 802.11 WLAN. Proceedings of 15th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC '04), September 2004, Barcelona, Spain 3: 1922-1926.Google Scholar
  6. Zang Y, Hiertz G, Habetha J, Otal B, Sirin H, Reumerman H-J: Towards high speed wireless personal area network - efficiency analysis of MBOA MAC. Proceedings of International Workshop on Wireless Ad-Hoc Networks (IWWAN '05), May 2005, London, UK 10-20.Google Scholar
  7. Xiao Y, Li H: Evaluation of distributed admission control for the IEEE 802.11 e EDCA. IEEE Communications Magazine 2004,42(9):S20-S24. 10.1109/MCOM.2004.1336720View ArticleGoogle Scholar
  8. Wall J, Khan JY: An adaptive ARQ enhancement to support multimedia traffic using 802.11 wireless LANs. Proceedings of IEEE Global Telecommunications Conference (GLOBECOM '04), November 2004, Dallas, Tex, USA 5: 3037-3041.View ArticleGoogle Scholar
  9. Chatzimisios P, Boucouvalas AC, Vitsas V: IEEE 802.11 wireless LANs: performance analysis and protocol refinement. EURASIP Journal on Wireless Communications and Networking 2005,2005(1):67-78.View ArticleMATHGoogle Scholar
  10. Gannoune L, Robert S: Dynamic tuning of the contention window minimum (CWmin) for enhanced service differentiation in IEEE 802.11 wireless ad-hoc networks. Proceedings of 15th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC '04), September 2004, Barcelona, Spain 1: 311-317.Google Scholar
  11. Bandinelli M, Chifi F, Fantacci R, Tarchi D, Vannuccini G: A link adaptation strategy for QoS support in IEEE 802.11e-based WLANs. Proceedings of IEEE Wireless Communications and Networking Conference (WCNC '05), March 2005, New Orleans, La, USA 1: 120-125.Google Scholar
  12. Iera A, Ruggeri G, Tripodi D: Providing throughput guarantees in 802.11e WLAN through a dynamic priority assignment mechanism. Wireless Personal Communications 2005,34(1-2):109-125. 10.1007/s11277-005-8729-7View ArticleGoogle Scholar
  13. Chen D, Gu D, Zhang J: Supporting real-time traffic with QoS in IEEE 802.11e based home networks. Proceedings of 1st IEEE Consumer Communications and Networking Conference (CCNC '04), January 2004, Las Vegas, Nev, USA 205-209.Google Scholar
  14. Smith G, Dillon D: QOS over IEEE 802.11e: the need for HCCA for video applications. Bermai, pp. 1–13, 2004Google Scholar
  15. Al-Karaki JN, Chang JM: Quality of service support in IEEE 802.11 wireless ad hoc networks. Ad Hoc Networks 2004,2(3):265-281. 10.1016/j.adhoc.2004.03.006View ArticleGoogle Scholar
  16. Mangold S, Choi S, Hiertz GR, Klein O, Walke B: Analysis of IEEE 802.11 e for QoS support in wireless LANs. IEEE Wireless Communications 2003,10(6):40-50. 10.1109/MWC.2003.1265851View ArticleGoogle Scholar
  17. Brady P: A model for generating on-off speech patterns in two-way conversation. Bell System Technical Journal 1969, 48: 2445-2472.View ArticleGoogle Scholar
  18. Zheng J, Regentova E: An improved polling scheme for voice support in IEEE 802.11 wireless network. Proceedings of International Conference on Information Technology: Coding and Computing (ITCC '05), April 2005, Las Vegas, Nev, USA 2: 603-608.Google Scholar
  19. Ma X, Du C, Niu Z: Adaptive polling list arrangement scheme for voice transmission with PCF in wireless LANs. Proceedings of Joint Conference of the 10th Asia-Pacific Conference on Communications and the 5th International Symposium on Multi-Dimensional Mobile Communications Proceedings (APCC/MDMC '04), August-September 2004, Beijing, China 1: 21-25.Google Scholar
  20. Lam RYW, Leung VCM, Chan HCB: Polling-based protocols for packet voice transport over IEEE 802.11 wireless local area networks. IEEE Wireless Communications 2006,13(1):22-29. 10.1109/MWC.2006.1593521View ArticleGoogle Scholar
  21. ITU-T (International Telecommunications Union - Telecommunication Standardisation Sector) : Transmission systems and media: general characteristics of international telephone connections and international telephone circuits: one-way transmission time. 1996.Google Scholar
  22. Ma X, Wu Y, Niu Z, Sato T: Performance analysis of the packetized voice transmission with PCF in an IEEE802.11 infrastructure wireless LAN. Proceedings of 9th Asia-Pacific Conference on Communications (APCC '03), September 2003, Penang, Malaysia 2: 571-575.Google Scholar
  23. Haines RJ, Lewis T, Coon J, Fanning N: Non-linear optimization of IEEE 802.11e super-frame configuration. Proceedings of 63rd IEEE Vehicular Technology Conference (VTC '06), May 2006, Melbourne, Australia 3: 1211-1215.Google Scholar
  24. Krishnamachari B, Ordóñez F: Analysis of energy-efficient, fair routing in wireless sensor networks through non-linear optimization. Proceedings of 58th IEEE Vehicular Technology Conference (VTC '03), October 2003, Orlando, Fla, USA 5: 2844-2848.Google Scholar
  25. Sandell M, Coon J: Near-optimal training sequences for MIMO OFDM systems with nulled subcarriers. Proceedings of IEEE Global Telecommunications Conference (GLOBECOM '05), November-December 2005, St. Louis, Mo, USA 2244-2249.Google Scholar
  26. Boyd S, Vandenberghe L: Convex Optimization. Cambridge University Press, Cambridge, Mass, USA; 2004.View ArticleMATHGoogle Scholar
  27. Wang L, Hamdi M, Manivasakan R, Tsang DHK: Multimedia-MAC protocol: its performance analysis and applications for WDM networks. IEEE Transactions on Communications 2006,54(3):518-531.View ArticleGoogle Scholar
  28. Cooper RB: Introduction to Queueing Theory. Elsevier/North Holland, Amsterdam, The Netherlands; 1981.MATHGoogle Scholar
  29. Bianchi G: Performance analysis of the IEEE 802.11 distributed coordination function. IEEE Journal on Selected Areas in Communications 2000,18(3):535-547. 10.1109/49.840210View ArticleGoogle Scholar

Copyright

© R. J. Haines et al. 2007

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.