Analysis of the Bluetooth device discovery protocol

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 elimi...

• Type: Journal
• Year: 2010
• Where: WINET
• Authors: Goutam Chakraborty, Kshirasagar Naik, Debasish Chakraborty, Norio Shiratori, David S. L. Wei
• Keywords: Analytical Model, Backoff Limit, Discovery Time, WINET 2010