Yuta Sawa
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Yuta Sawa has a total of 3 co-authors. Here are the top co-authors by number of shared publications:
- Hiroyuki Hatano
Department of Electrical and Electronics Engineering, Mie University, 1577 Kurimamachiya-cho, Tsu-shi 514-8507, Japan
1 shared publication - Kazuo Mori
Graduate School of Engineering, Mie University, Tsu, Mie 514-8504, Japan
1 shared publication - Kosuke Sanada
Graduate School of Engineering, Mie University
1 shared publication
Latest Publications
- Open Access
An Improved Backoff Scheme and Its Performance Analysis for Full Duplex MAC Protocols in VLC Networks
IEEE 802.15.7 Visible Light Communication (VLC) networks suffer from performance degradation caused by the hidden device collisions due to the directional transmission with narrow beamwidth. One of the solutions for mitigating the hidden device collisions is to employ a full-duplex transmission technique. As a side effect of the full-duplex transmission in the VLC networks, however, the data-packet discard due to the retransmission limitation occurs frequently in the networks. This paper proposes an improved backoff scheme and its performance analysis to suppress the packet discard. The proposed backoff scheme increases the Backoff Exponent (BE) and the Number of Backoff stage (NB) in IEEE 802.15.7 only when the data packet transmission fails. To evaluate the system performance theoretically, this paper also provides the Markov-chain model for channel access with the proposed scheme. The performance evaluations through simulation and theoretical analysis show the effectiveness of the proposed scheme.
Open AccessAn Improved Backoff Scheme and Its Performance Analysis for Full Duplex MAC Protocols in VLC Networks
IEEE 802.15.7 Visible Light Communication (VLC) networks suffer from performance degradation caused by the hidden device collisions due to the directional transmission with narrow beamwidth. One of the solutions for mitigating the hidden device collisions is to employ a full-duplex transmission technique. As a side effect of the full-duplex transmission in the VLC networks, however, the data-packet discard due to the retransmission limitation occurs frequently in the networks. This paper proposes an improved backoff scheme and its performance analysis to suppress the packet discard. The proposed backoff scheme increases the Backoff Exponent (BE) and the Number of Backoff stage (NB) in IEEE 802.15.7 only when the data packet transmission fails. To evaluate the system performance theoretically, this paper also provides the Markov-chain model for channel access with the proposed scheme. The performance evaluations through simulation and theoretical analysis show the effectiveness of the proposed scheme.