Improved throughput by interference avoidance in co-located Bluetooth networks

The Bluetooth channel is represented by a pseudorandom hopping sequence over 79 RF channels. When more than one Bluetooth piconet is operated in any given location, there will be mutual interference because each piconet selects its hop frequency independently. Packets will be lost whenever nodes hop to the same frequency. The larger the number of colocated piconets, the higher the probability that a packet will be lost due to co-channel interference. By co-ordinating the selection of hop frequency, mutual interference can be avoided. This represents an improvement in throughput with increasing number of co-located piconets. The emphasis in this paper is on minimising interference and consequent packet loss by eliminating co-channel interference when multiple clients access services via co-located access points.