Indoor Planning of Optical Wireless Networks for LoS Condition in Access and Backhauling
arxiv(2023)
摘要
Optical wireless technology has the potential to complement the wireless
access services provided so far over RF. Apart from the abundant unlicensed
bandwidth available for ultra-dense deployments over optical wireless bands,
optical wireless also has the potential to offer inexpensive, private, secure,
and environmentally friendly communications. However, the main challenge of
this technology is the inability to pass through obstacles, requiring a
Line-of-Sight~(LoS) condition between transmitter and receiver. In addition,
when LEDs are used to provide simultaneously wireless access and illumination,
the range of the optical wireless links is notably limited. Since the typical
size of Visible Light Communications~(VLC) cells is in the order of few meters,
it is challenging to plan the detailed deployment of Access Points~(APs) to
prevent coverage holes. This paper proposes a graph modeling approach for
identifying the minimum number of APs (and their locations) for the given
indoor floor plan. A connectivity tree is considered to ensure that each VLC AP
can communicate with (an)other AP(s) through a LoS infrared wireless link for
backhauling. The presented deployment procedure can also control the co-channel
interference that is generated throughout the entire indoor environment,
enhancing the data rate and illumination performance of VLC networks
simultaneously.
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