Holdover in synchronization applications: Difference between revisions

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==The Importance of GPS Derived Timing==
 
GPS as a source of timing is a key component in not just [[Synchronization in telecommunications]] but to critical infrastructure in general <ref>http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA503921</ref>. Of the 18 Critical Resource and Key infrastructure ([[CIKR<ref>http://training.fema.gov/EMIWeb/IS/IS860a/CIKR/sectorMenu.htm|CIKR]]</ref>) sectors, 15 use GPS derived timing to function correctly <ref>http://www.swpc.noaa.gov/sww/SWW_2011_Presentations/Wed_830/GPS-PNTTimingStudy-SpaceWeather4-27.pptx</ref>
 
A key application for GPS derived timing is to provide synchronization in wireless basestations and in these applications Holdover is used in base stations to ensure continued operation while GPS is unavailable and to reduce the costs associated with repairs <ref>http://www.eetimes.com/design/communications-design/4213947/Understanding-the-concepts-of-synchronization-and-holdover</ref>