关键词: 蓝牙, 数据分组, 吞吐量, 丢包率

Abstract: The transmission performances of Bluetooth 2.0+EDR specification are analyzed，including average maximum throughput under different channel quality.The adaptive packet selection strategy according to the channel quality is presented.A new channel quality estimation method based on the packet error statistics is suggested.The throughput of the last packets is found out.Comparing it with the average throughput in the SNR corner point of packet selection，the area of channel quality and the preferred packet can be determined.The simulation results show that when the number of the packets used to determine is about 30，the throughput is greatly close to the average maximum throughput.The strategy takes little overhead of the hardware and software.The decision procedure is simple and quick and can follow the track of channel quality in very short time（about 100 ms）.The strategy can be used in the Bluetooth system which has any control unit.Furthermore，the method can trace the variance of channel quality in a very short time（40 ms~180 ms）.It is very appropriate for the Bluetooth systems moved slowly and Bluetooth wireless personal area networks.

Key words: Bluetooth, packet, throughput, packet error rate