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An Improved Backoff Scheme and Its Performance Analysis for Full Duplex MAC Protocols in VLC Networks.
Yuta Sawa1, Kosuke Sanada1, Hiroyuki Hatano1
1Department of Electrical and Electronics Engineering, Mie University, 1577 Kurimamachiya-cho, Tsu-shi 514-8507, Japan.
Sensors (Basel, Switzerland)
|December 28, 2021
Summary
This study introduces an improved backoff scheme for Visible Light Communication (VLC) networks to reduce data packet loss. The enhanced scheme adjusts backoff parameters upon transmission failure, mitigating issues in full-duplex VLC systems.
Area of Science:
- Computer Science
- Electrical Engineering
- Wireless Communication
Background:
- IEEE 802.15.7 Visible Light Communication (VLC) networks face performance issues due to hidden device collisions from narrow beamwidth transmissions.
- Full-duplex transmission is a potential solution but can lead to frequent data-packet discards because of retransmission limitations.
Purpose of the Study:
- To propose and analyze an improved backoff scheme to mitigate data-packet discards in full-duplex VLC networks.
- To enhance the reliability and performance of IEEE 802.15.7 VLC systems.
Main Methods:
- A novel backoff scheme is proposed that dynamically increases the Backoff Exponent (BE) and Number of Backoff stages (NB) upon data packet transmission failure.
- A Markov-chain model is developed for theoretical performance evaluation of the channel access with the proposed scheme.
Main Results:
- The proposed backoff scheme effectively suppresses data-packet discards in VLC networks.
- Performance evaluations via simulation and theoretical analysis confirm the scheme's effectiveness.
Conclusions:
- The improved backoff scheme offers a viable solution to enhance the performance of full-duplex VLC networks by reducing packet loss.
- This work contributes to more robust and efficient visible light communication systems.
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