Channel-aware multichannel random access for energy-limited sensors and MTC devices

Choi, Jinho 2018, Channel-aware multichannel random access for energy-limited sensors and MTC devices, IEEE Access, vol. 6, pp. 59929-59939, doi: 10.1109/ACCESS.2018.2876097.

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Title Channel-aware multichannel random access for energy-limited sensors and MTC devices
Author(s) Choi, JinhoORCID iD for Choi, Jinho
Journal name IEEE Access
Volume number 6
Start page 59929
End page 59939
Total pages 11
Publisher IEEE
Place of publication Piscataway, N.J.
Publication date 2018-11-08
ISSN 2169-3536
Keyword(s) Science & Technology
Computer Science, Information Systems
Engineering, Electrical & Electronic
Computer Science
Machine-type communications
random access
energy efficiency
Summary In machine-type communications (MTC) or wireless sensor networks (WSNs), since MTC devices or sensors have limited supply of energy, energy efficient transmission schemes are important. In addition, transmission schemes should not be complicated for sensors of limited capabilities. In time-division duplexing mode, channel-aware random access schemes seem promising as they can be implemented with simple operations without coordination and exploit the channel state information for energy efficient transmissions. In this paper, we propose a channel-aware random access scheme with multiple slots where each slot's transmission probability can be optimized under long-term and short-term energy constraints. The proposed scheme outperforms a single threshold-based channel-aware random access scheme for a low maximum transmission power of sensors. Furthermore, due to multiple slots, sensors of low channel gains can also transmit their local signals as those of high channel gains, which improves the fairness.
Language eng
DOI 10.1109/ACCESS.2018.2876097
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2018, IEEE
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