Impacts of Bluetooth Device Addresses and Native Clocks on Packet Interference in Piconets
Kshirasagar Naik, Veluppillai Mahinthan · Journal of Wireless Networking and Communications · 2014
the main contribution of this paper is that hitherto unknown special characteristics of Bluetooth co-channel interference are revealed. In a Bluetooth piconet, the channel hop frequency at any instant of time is determined by the Master’s device address and its native clock. In a cluster of two masters of the 79-hop type, average packet error rate is 1/79 (= 1.26%), and it increases by almost 1% for each additional Master up to a reasonably large number, say 40 Masters. By actually implementing the hop selection kernel for the 79-hop system as specified in the Baseband Specification, we carry out experiments. Those experiments reveal that under certain conditions on device addresses and native clocks, interference can be as high as 50% even with just two Masters. We conclude that packet interference rate in a certain cluster of Bluetooth Masters is actually determined by their device addresses and the asynchrony among their native clocks.