AVOIDANCE OF SELF-INTERFERENCE IN BLUETOOTH SCATTERNETS
Petar Popovski, Liljana M. Gavrilovska, Ramjee Prasad · 2003
(WPAN) supports wireless connections among devices within short range. Basic networking entity in Bluetooth is piconet and piconets can be interconnected into a scatternet. Since the piconets in scatternet are not mutually coordinated at the medium access layer, there is an inter-piconet interference (self-interference), which can seriously degrade the communication performance and cause energy wasting. In this paper we discuss a distributed algorithm for interference avoidance in Bluetooth scatternets, which we have previously proposed in a companion paper [1]. The algorithm avoids collisions by ensuring distributed consensus among piconets in case of concurrent transmission. The overhead introduced by the algorithm is low and there are high gains in energy efficiency and throughput. We show here that the gain is retained under imperfect clock information among the piconets. Index terms—Ad hoc networks, Bluetooth, scatternet, coexistence, interference, self-interference 1.