Abstract
Several Bluetooth piconets can be interconnected using an inter-piconet unit called a bridge node to form a Bluetooth scatternet. The bridge node can make its presence in each piconet on a time division basis by switching its frequency hopping sequence. Without a careful coordination among nodes, piconet switching can result in conflicts and idle time in communication, which impact the throughput of the entire scatternet. In this paper we present an efficient inter-piconet scheduling scheme called LSRR (Limited Sniff Round Robin). LSRR is a locally coordinated scheduling scheme that assigns presence points in round robin fashion among different piconets. LSRR uses the sniff mode as the inter-piconet switching mechanism and dynamically adjusts the duration of communication events based on the past history of transmissions. Simulation results show LSRR outperforms the pure round robin scheme in terms of throughput and delay.
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