Optical wireless
technology does not use the RF spectrum and, therefore, does not require an FCC
license to operate. Optical wireless is also not vulnerable to external interference
because of its narrow field of view.
?– Low latency and small jitter Optical wireless technology adds virtually no
latency as compared to most other wireless technologies. Mesh architecture does
have the potential to add delay at each hop of the mesh. However, with each node
of a mesh providing traffic classification and prioritization functions, the delay
experienced by data traffic at each hop can be minimized to be insignificant.
Optical Wireless Mesh Networks 257
Therefore, the end-to-end latency and jitter experienced by data traffic in an optical
wireless mesh network can meet or exceed the stringent requirements of even
the most demanding applications.
Shortcomings
?– Weather dependency/link distance Weather is undoubtedly the most significant
shortcoming of optical wireless technology. Severe weather conditions such as
heavy fog can cause significant outage of FSO links. Moderate weather conditions
such as light fog or rain can cause outages of most FSO links operating at distances
over 1 km.
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