Collision Resolution for Robust Coexistence of Multiple Bluetooth Piconets

With the increasing popularity of wireless networking, multiple networks are likely to coexist in a physical environment. Without coordination among coexisting networks, interference due to frequency collision may greatly decrease the performance. For example, packet error rate can be as high as 20% in a 12-piconet environment [1]. Most existing techniques focus on collision avoidance at the MAC layer, which are not applicable when there are multiple uncoordinated frequency hopping (FH) networks, such as multiple Bluetooth piconets. Recently we developed a signal processing technique that resolves collisions in the physical layer, and recovers data packet without retransmission, thus improving network throughput.