Activate the CQDDR Role for Improving Throughput over IEEE 802.15.1 Wireless Links

Abstract

Channel Quality Driven Data Rate (CQDDR) play main role in the throughput factor over IEEE 802.15.1 Bluetooth network. CQDDR is employed to selects the packet size by Received Signal Strength Indicator (RSSI) over Bluetooth network according to channel conditions. This paper tries to improve the throughput over Bluetooth system in classic and Enhanced Data Rate (EDR) packets. The paper studies the adaptive Bluetooth packet format according to CQDDR decision which determines when it can extend the payload (PL) of transmitted packets. This paper proposes transmitting uncoded Access Code (AC) and the header (HD) as optional packets type. Many of proposed packets format are studied in additive White Gaussian Noise (AWGN) and fading channels. Our simulation experiments reveal the capability of extension the PL length by 8 bytes for classic BT and 16 bytes for EDR BT. Also, the experiments reveal ineffectiveness of error control schemes of AC and HD in the case of uncoded packets (DH1). That means in good channel condition the redundant bits can be added to exceed the length of the PL.