Analysis of the Bluetooth device discovery protocol

Goutam Chakraborty, Kshirasagar Naik, Debasish Chakraborty, Norio Shiratori, David Wei

    Research output: Contribution to journalArticle

    18 Citations (Scopus)

    Abstract

    Device discovery and connection establishment are fundamental to communication between two Bluetooth (BT) devices. In this paper, we give an analytical model of the time it takes for the master in a piconet to discover one slave. We show that, even in the absence of packet interference, the discovery time can be long in some instances. We have simulated the discovery protocol by actually implementing it to validate the analytical model. By means of simulations, we show how discovery time is affected by (i) the presence of multiple potential slaves, and (ii) changes in the maximum backoff limit. Using simulation studies we observed the effectiveness of two proposed improvements to device discovery, namely, (i) avoiding repetitions of the A and B trains before a train switch, and (ii) eliminating the idea of random backoff, or reducing the backoff limit. We show that discovery time can be reduced by avoiding repetitions of the A and B trains before a train switch. However, complete elimination of the random backoff is not a good idea, as discovery time will be too long when the number of BT devices is large. Instead, choosing a small backoff limit of 250-300 slots is highly effective in reducing discovery time even in the presence of a large number (say, 50) of potential slaves.

    Original languageEnglish
    Pages (from-to)421-436
    Number of pages16
    JournalWireless Networks
    Volume16
    Issue number2
    DOIs
    Publication statusPublished - 2010 Feb

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    Keywords

    • Bluetooth
    • Device discovery
    • Inquiry
    • Inquiry scan

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Computer Networks and Communications
    • Information Systems

    Cite this

    Chakraborty, G., Naik, K., Chakraborty, D., Shiratori, N., & Wei, D. (2010). Analysis of the Bluetooth device discovery protocol. Wireless Networks, 16(2), 421-436. https://doi.org/10.1007/s11276-008-0142-1