Enhanced polling mechanism of Bluetooth for realtime traffic

Bluetooth which operates in the 2.4 GHz ISM band provides short range, low cost, low power pico-cellular wireless connectivity. It intends to become the wireless personal area network standard itself. The Bluetooth specification proposes a round robin scheduler as possible solution for scheduling slaves in a Bluetooth piconet. However, this basic scheme performs badly under asymmetric traffic conditions. Recently, several polling schemes have been proposed to improve performance on asymmetric transmissions and to enhance the performance of real-time traffic. In this paper, we present a new polling algorithm for Bluetooth piconet that supports both delay and bandwidth guarantees and aims to remain fair and efficient with asymmetric flow rates. We present an extensive set of simulations and provide performance comparisons with round robin. And the results show that the performance of our algorithm can be better than that of the round robin. In addition, our modification does not introduce any control overhead