Selective decoding scheme-MAC protocol in ad hoc networks with MIMO links

Authors:
Raungrong Suleesathira;Jansilp Aksiripipatkul;Wudhichai Assawinchaichote
Affiliations:
Department of Electronic and Telecommunication Engineering, Faculty of Engineering, King Mongkut's University of Technology, Tungkru, Bangkok, Thailand;Department of Electronic and Telecommunication Engineering, Faculty of Engineering, King Mongkut's University of Technology, Tungkru, Bangkok, Thailand;Department of Electronic and Telecommunication Engineering, Faculty of Engineering, King Mongkut's University of Technology, Tungkru, Bangkok, Thailand
Venue:
Research Letters in Signal Processing
Year:
2009

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Abstract

A problem encountered in the IEEE 802.11 MAC is the collision of simultaneous transmissions from either neighboring nodes or hidden nodes within the same contention floor. This paper presents the selective decoding schemes in MAC (SDS-MAC) protocol for MIMO ad hoc networks. It is able to mitigate interferences by means of a minimum mean-squared error (MMSE) technique. As a result, it allows a pair of simultaneous transmissions to the same or different nodes to yield the network utilization increase. The decoding schemes and time line operations are properly selected corresponding to the transmission demand of neighboring nodes to avoid collision. Transmission demand can be determined by the number of RTS packets and type of CTS packets. Simulation results are given to illustrate the SDS-MAC performance.