Multi-rate Relaying for Performance Improvement in IEEE 802.11 WLANs

  • Laura Marie Feeney
  • Bilge Cetin
  • Daniel Hollos
  • Martin Kubisch
  • Seble Mengesha
  • Holger Karl
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4517)

Abstract

It is well known that the presence of nodes using a low data transmit rate has a disproportionate impact on the performance of an IEEE 802.11 WLAN. ORP is an opportunistic relay protocol that allows nodes to increase their effective transmit rate by replacing a low data rate transmission with a two-hop sequence of shorter range, higher data rate transmissions, using an intermediate node as a relay. ORP differs from existing protocols in discovering relays experimentally, by optimistically making frames available for relaying. Relays identify themselves as suitable relays by forwarding these frames. This approach has several advantages compared with previously proposed relay protocols: Most importantly, ORP does not rely on observations of received signal strength to infer the availability of relay nodes and transmit rates. We present analytic and simulation results showing that ORP improves the throughput by up to 40% in a saturated IEEE 802.11b network.

Keywords

IEEE 802.11 cooperative communication protocols rate adaptation multi-hop wireless networks wireless LAN 

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References

  1. 1.
    Heusse, M., Rousseau, F., Berger-Sabbatel, G., Duda, A.: Performance anomaly of 802.11b. In: Proceedings of IEEE INFOCOM, IEEE Computer Society Press, Los Alamitos (2003)Google Scholar
  2. 2.
    Feeney, L.M., Hollos, D., Kubisch, M., Mengesha, S., Karl, H.: A geometric derivation of the probability of finding a relay in multi-rate networks. In: Mitrou, N.M., Kontovasilis, K., Rouskas, G.N., Iliadis, I., Merakos, L. (eds.) NETWORKING 2004. LNCS, vol. 3042, pp. 1312–1317. Springer, Heidelberg (2004)Google Scholar
  3. 3.
    Liu, P., Tao, Z., Panwar, S.: A cooperative MAC protocol for wireless local area networks. In: IEEE Conference on Communications (ICC 2005), IEEE Computer Society Press, Los Alamitos (2005)Google Scholar
  4. 4.
    Zhu, H., Cao, G.: On improving the performance of IEEE 802.11 with relay-enabled PCF. MONET 9(4), 423–434 (2004)Google Scholar
  5. 5.
    Zhu, H., Cao, G.: rDCF: A relay-enabled medium access control protocol for wireless ad hoc networks. In: Proceedings of IEEE INFOCOM, IEEE Computer Society Press, Los Alamitos (2005)Google Scholar
  6. 6.
    Liu, J., Lin, C.: An opportunistic relay method for increasing throughput in multirate IEEE 802.11 wireless LAN. IEICE Transactions on Communications (2005)Google Scholar
  7. 7.
    Cetin, B.: Opportunistic relay protocol for IEEE 802.11 WLANs. Master’s thesis, Royal Institute of Technology (2006)Google Scholar
  8. 8.
  9. 9.
    Kamerman, A., Monteban, L.: WaveLAN-II a high-performance wireless LAN for the unlicensed band. Bell Labs Technical Journal (Summer), 118–133 (1997)Google Scholar
  10. 10.
    Varga, A.: The OMNeT++ discrete event simulation system’. In: Proceedings of the European Simulation Multiconference, ESM’01 (2001)Google Scholar
  11. 11.
    Koepke, A., Willkom, D.: http://www.sourceforge.net
  12. 12.
    Ebert, J.P., Aier, S., Kofahl, G., Becker, A., Burns, B., Wolisz, A.: Measurement and simulation of the energy consumption of a WLAN interface. Technical Report TKN-02-010, Technical University Berlin (2002)Google Scholar

Copyright information

© Springer Berlin Heidelberg 2007

Authors and Affiliations

  • Laura Marie Feeney
    • 1
  • Bilge Cetin
    • 1
  • Daniel Hollos
    • 2
  • Martin Kubisch
    • 2
  • Seble Mengesha
    • 2
  • Holger Karl
    • 3
  1. 1.Swedish Institute of Computer Science, KistaSweden
  2. 2.Technical University BerlinGermany
  3. 3.University of PaderbornGermany

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