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Sensors and Materials
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Sensors and Materials,
Volume 30, Number 8(1) (2018)

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pp. 1665-1670
S&M1623
https://doi.org/10.18494/SAM.2018.1862
Published: August 15, 2018

Distributed Interference-aware Medium Access Control for IEEE 802.15.7 Visible Light Communications [PDF]

Eui-Jik Kim, Jung-Hyok Kwon, Dongwan Kim, and Yongseok Lim

(Received March 30, 2017; Accepted January 22, 2018)

Keywords: backoff exponent adaptation, CSMA/CA, IEEE 802.15.7 VLC, medium access control, VLC interferer discovery

In this paper, we present a distributed interference-aware medium access control (DI-MAC) for IEEE 802.15.7 visible light communications (VLCs), which improves the spatial efficiency of VLC devices deployed in specific service areas. The DI-MAC adaptively adjusts the backoff exponent (BE) of each VLC device by considering the number of adjacent VLC devices causing the interference, which are called VLC interferers. Therefore, it reduces interference between the VLC devices and unnecessary waiting time for channel access. To this end, the DI-MAC conducts VLC interferer discovery by using the IDs of VLC interferers obtained via hello messages from adjacent VLC devices and then performing a BE adaptation to determine the BE of each VLC device based on the number of VLC interferers. An experimental simulation was conducted to evaluate the performance of the DI-MAC, and the results show that the DI-MAC obtains a higher aggregate throughput performance than the existing IEEE 802.15.7 VLC.

Corresponding author: Yongseok Lim


Cite this article
Eui-Jik Kim, Jung-Hyok Kwon, Dongwan Kim, and Yongseok Lim, Distributed Interference-aware Medium Access Control for IEEE 802.15.7 Visible Light Communications, Sens. Mater., Vol. 30, No. 8, 2018, p. 1665-1670.


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