Bluetooth Sar Programs And The Scheduling Algorithm And Bluetooth Simulation Experiments

Bluetooth is a new low-power, low-cost wireless technology that is going to play an important role in communications among mobile computers, mobile phones and other small electronic devices. Although Bluetooth is a world wide standard and is developed by the most influencing companies in the world there are still some uncovered problems in it, and solving them is a necessity. Two of these problems are SAR policy and scheduling algorithm.The average throughput expressions of the six Bluetooth ACL packets in AWGN are derived in my thesis, it shows different packets have maximum throughput at different values of SNR. Based on them, SAR adopts an adaptive transmission method which decide the packet type depending on the varying SNR of the channel. In Bluetooth TDD system, the conventional scheduling policies such as Round Robin and Deficit Round Robin perform poorly as they are not suited to the tight coupling of uplink-downlink scheduling and result in slot wastage and unfairness. At the same time, they can also decrease the transfer rate from 1Mbps to a very low rate. This paper study and compare several modified MAC scheduling algorithms designed to improve the performance of asynchronous data traffic over a Bluetooth piconet. Finally the simulation result shows that PMP scheduling algorithm gives better performance. This thesis also simulate a set of experiments with BlueHoc simulator and gather measurements of some Bluetooth characteristics: throughput of all kinds of ACL packet and duration of inquiry and page in point to point connection.