Holdover in synchronization applications: Difference between revisions

Revision as of 14:56, 12 September 2011

Revision as of 14:58, 12 September 2011

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Base stations depend on timing to operate correctly, particularly for the handoff that occurs when a user moves from one cell to another.<ref>http://www.gmat.unsw.edu.au/snap/publications/khan&dempster2007b.pdf</ref>

1us for base-stations <ref>http://www.telecom-sync.com/pdf/2008/Day1/WCDMA_and_LTE_Synchronisation_Aspects_(Stefano_Rufini,_Ericsson).pdf</ref>

1us for base-stations

Search for reliable timing based on something other than $3k Rubidium spurred on by the need for CDMA to compete. <ref>http://www.4timing.com/SyncGPS.pdf</ref>

Holdover is important for E911 for example. Most critical telecom applications require precise time and frequency and synchronization to operate properly such as VoIP, video streaming, TDM (time division multiplex) services, voice switching, mobile services, and any LBS (___location based services, with E911 being the most important). <ref>http://www.eetimes.com/design/communications-design/4213947/Understanding-the-concepts-of-synchronization-and-holdover</ref>

1us for synchrophasors