#From
https://www.everythingrf.com/community/what-is-terragraph
Mar 8, 2019
Terragraph, is a project started by facebook to reduce the time
and cost for service providers to deploy high speed connectivity
through the use of millimeter wave technology. It is a 60 GHz
multi-hop multi-point wireless network that delivers gigabit
speeds in dense urban areas. The aim of the project is to create
a mm-Wave wireless network within a city and to deliver fiber-like
connectivity at a lower cost than fiber.
Terragraph radios are based on the WiGig standard and can be
deployed on street poles or rooftops.
The Terragraph network operates in the unlicensed 60 GHz
'V' band and uses the cloud for intensive data processing and
self-organization. The 60 GHz band has over 7 GHz of bandwidth
available for use (some countries like US are even expanding it
to 14 GHz), making it the largest commercial radio band ever
used.
The technology employs a TDD/TDMA MAC structure which enables
extremely efficient use of this spectrum even in highly congested
scenarios. The radios are able to inter-connect to form a Layer
3 mesh which can be scaled over large geographic areas and
provides redundant and reliable connectivity between end-points.
Terragraph radio nodes can be deployed on a number of physical
assets such as street furniture to provide last-mile gigabit-per-second
subscriber residences. The deployment of street-level radios
mitigates the high costs associated with running fiber to every
street corner, thus lowering the cost-barrier for service
providers to bridge the demand for high speed connectivity.
Key Features of Terragraph:
• Operates in the unlicensed V-band: 60 GHz
• Uses standardized 802.11ad and 802.11ay, enhanced with TDD/TMDA
for MAC efficiency at scale
• Current proof-of-concept system has a peak data rate of 4.6 Gbps
(one direction) and average peak user throughput of over 1 Gbps
• Single link maximum range is approximately 250 meters
• The network can be deployed in days rather than months
• Highly cost effective vs buried fiber
• Small, lightweight and low power - suitable for street level
deployments
• Supports highly scalable layer-3 mesh, powered by Open/Routing
software
• Uses IPv6
