An Efficient Multi-slot Transmission Scheme for Bluetooth Systems

C.Y. Lee and K.W. Sung (Korea)

Keywords

Bluetooth, Throughput, Multislot Packet, Minislot ErrorProbability, and Maximum Likelihood Estimator (MLE)

Abstract

Bluetooth is an open specification for a technology to enable short-range wireless communications. Bluetooth uses a frequency hopping with a slot length of 625 µs. Each slot corresponds to a packet and multi-slot packets of 3 or 5 slots can be transmitted to enhance the transmission efficiency. However, the use of multi-slot packet may degrade the performance under the high channel error probability. Thus, the length of multi-slot should be adjusted according to the current channel condition. In this paper, we propose an efficient multi-slot transmission scheme which adaptively determines the optimal length of slots for a packet according to the channel error probability. We derive the throughput of a Bluetooth connection and develop the decision criteria and the decision rule which give the optimal length of the multi-slot. Maximum likelihood estimator (MLE) is used to estimate the channel error probability.

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