ITU Approves Two New Recommendations on 5G Synchronization This Weekend

The ITU approved two new recommendations on synchronisation this weekend. G.8272.1 is the first “enhanced” clock specification aimed at meeting the requirements for 5G mobile infrastructure. The document specifies the enhanced PRTC (Primary Reference Time Clock), basically a very high accuracy GNSS timing receiver, capable of delivering time to within 30ns of UTC.

This is over three times more accurate than the previous generation PRTCs, which were capable of meeting 100ns. At least one major vendor has already announced a product meeting this standard, so this is clearly real technology.

The second recommendation released this weekend was in some ways a throwback to the old, “safe and secure” frequency world. G.8266 defines the requirements of the PTP grandmaster delivering frequency over PTP. You may ask “why?”, since all the other recommendations associated with using PTP for frequency were published four or five years ago. The release of G.8266 plugs a gap in that suite of recommendations, since there was no agreed set of performance criteria to evaluate the GM against. As such, the frequency recommendations are complete for now, until the enhanced clock specifications come along next year (e.g. the enhanced SyncE clock).

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Events

ITSF 2019

Nov 04, 2019
Global Conference on Timing and Synchronisation Across Networks. The International Timing…
191 Read more

ECOC 2019

Sep 23, 2019
The ECOC (European Conference on Optical Communcation) exhibition is the largest optical…
183 Read more

ISPCS

Sep 22, 2019
The objective of the symposium, to be held in Portland, Oregon, USA, is to provide a…
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CIOE 2019

Sep 04, 2019
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189 Read more

WSTS

Mar 25, 2019
WSTS is a vendor-neutral technology workshop that addresses evolving sync requirements,…
2425 Read more

EANTC

Mar 04, 2019
The European Advanced Networking Test Center (EANTC) is internationally recognized as an…
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MWC

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