Wireless Communications & Mobile Computing
TCP performance issues over wireless links
IEEE Communications Magazine
IEEE Journal on Selected Areas in Communications
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A full duplex Bluetooth simulation model is presented by Simulink of MATLAB. The model includes Bluetooth physical layer and baseband layer. A short range wireless communication channel model is established. The channel model is used that takes into account positioning, propagation effects and radio characteristics. Based on those, the radio performance of Bluetooth system is investigated by simulation, including the throughput of data transmission, Frame Error Rate and Bits Error Rate of SCO link etc. Through the simulation, we can see the detail transmission performances of different packet type. Furthermore, the model can simulate more scenario of Bluetooth communication, such as coexistences with other ISM devices or interferences from other Bluetooth piconets. In conclusion, the model can be used to do a lot of research work, if only little modification is made. Testing system and device designs early in the development process in this way can substantially increase productive efficiency and reduces the risk of design flaws. The transmission performances of Bluetooth 2.0+EDR specification are analyzed, including average maximum throughput under different channel quality. A new adaptive select strategy based on the history of the packets errors is suggested. The channel quality is estimated by the packet error statistics of recent transmission packets. The type of next packet need to send is judged and can be adjusted dynamically. The simulation results show that when the number of the packets used to be decided is about 30, the throughput is greatly close to the average maximum throughput. The strategy takes little overhead of the hardware and software. The judgment procedure is simple and quick. The strategy can be used in the Bluetooth system which has any control unit.