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An adaptive rate and coding scheme for MIMO-enabled IEEE 802.11-based Soft-Real-Time wireless sensor and actuator networks

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3 Author(s)
Maadani, M. ; Dept. of Eng., Islamic Azad Univ., Tehran, Iran ; Motamedi, S.A. ; Safdarkhani, H.

Being reliable and real-time, are the two most challenging requirements of wireless sensor and actuator networks (WSAN) due to the shared, error-prone and nondeterministic behaviour of wireless communication medium. In this paper, an adaptive data-rate and space-time coding (STC) scheme has been proposed for the IEEE 802.11-based Soft-Real-Time WSAN's utilizing Enhanced Distributed Channel Access (EDCA) at Medium Access Control (MAC) and Multiple-Input Multiple-Output (MIMO) transceivers at PHYsical (PHY) layer, with the target of minimizing average and/or maximum packet delay. Using this technique, delay and reliability have considerably been improved compared with traditional IEEE 802.11 stations, especially in dense networks and/or environments with vast range of Signal to Noise Ratio (SNR) variation.

Published in:

Computer Research and Development (ICCRD), 2011 3rd International Conference on  (Volume:1 )

Date of Conference:

11-13 March 2011

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