Joint optimal channel probing and transmission in collocated wireless networks

Dong Zheng, Junshan Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

We consider a collocated wireless network where all links contend for a given channel and each link can hear others' transmissions. Due to channel fading, the link condition corresponding to a successful channel probing could be either good or bad. In the latter case, further channel probing may lead to better channel conditions, which in turn yields higher throughput. There is clearly a tradeoff between the throughput gain from better channel conditions and the cost for further channel probing. The desired tradeoff can be achieved by choosing the optimal stopping time for channel probing and the transmission rate, in the sense of maximizing the overall average throughput. Using optimal stopping theory, we show that the joint optimal channel probing and transmission (JOCPT) strategy is apure threshold policy, and interestingly, the threshold turns out to be the optimal average throughput, which is the solution to a fixed point equation. Since the optimal throughput usually cannot be obtained in closed form, we derive a lower bound and an upper bound on the optimal throughput, and devise an iterative algorithm to compute it. Finally, we use numerical examples to show that significant throughput gain can be achieved by the JOCPT strategy.

Original languageEnglish (US)
Title of host publicationProceedings - IEEE INFOCOM 2007
Subtitle of host publication26th IEEE International Conference on Computer Communications
Pages2266-2270
Number of pages5
DOIs
StatePublished - Sep 4 2007
EventIEEE INFOCOM 2007: 26th IEEE International Conference on Computer Communications - Anchorage, AK, United States
Duration: May 6 2007May 12 2007

Publication series

NameProceedings - IEEE INFOCOM
ISSN (Print)0743-166X

Other

OtherIEEE INFOCOM 2007: 26th IEEE International Conference on Computer Communications
CountryUnited States
CityAnchorage, AK
Period5/6/075/12/07

ASJC Scopus subject areas

  • Computer Science(all)
  • Electrical and Electronic Engineering

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  • Cite this

    Zheng, D., & Zhang, J. (2007). Joint optimal channel probing and transmission in collocated wireless networks. In Proceedings - IEEE INFOCOM 2007: 26th IEEE International Conference on Computer Communications (pp. 2266-2270). [4215844] (Proceedings - IEEE INFOCOM). https://doi.org/10.1109/INFCOM.2007.262