#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
   connectivity between a service providerâs fiber presence and
   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