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Difference between revisions of "HiPath Cordless IP - IEEE 1588"

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However, accurate time synchronization between the DECT IP base stations is vital for a seamless call handover.<br>  
 
However, accurate time synchronization between the DECT IP base stations is vital for a seamless call handover.<br>  
 
Two methods of synchronization are provided by HiPath Cordless IP, both can be mixed in one system.  
 
Two methods of synchronization are provided by HiPath Cordless IP, both can be mixed in one system.  
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'''synchronization via DECT (radio/air synchronization)'''<br>
 
'''synchronization via DECT (radio/air synchronization)'''<br>
 
In order to synchronize with another DECT IP base station via the DECT interface, a DECT IP base station must be within the overlap area of the radio cell that forms this DECT IP base station.
 
In order to synchronize with another DECT IP base station via the DECT interface, a DECT IP base station must be within the overlap area of the radio cell that forms this DECT IP base station.
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One DECT IP base station can by synchronised via LAN with other DECT IP base stations. This is done via the IEEE Standard Precision Time Protocol (PTP)
 
One DECT IP base station can by synchronised via LAN with other DECT IP base stations. This is done via the IEEE Standard Precision Time Protocol (PTP)
 
IEEE1588.  
 
IEEE1588.  
In difference to the HiPath Cordless IP synchronization over air, the Ethernet based synchronization mechanism (according IEE1588, PTP [[wpen:Precision_Time_Protocol|Precious Time Protocol]]) requires fewer configurations. <br>On the other hand, requirements are made on the Ethernet characteristics like loss, delay, jitter etc. Therefore special requirements regarding the Ethernet components (especially to the Ethernet switches) have to be considered. If these values (especially jitter) are bad Sync loses are likely. Please remember, if a HiPath Cordless IP&nbsp;base station loses the Sync it will not accept any calls and will try to resync.  
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In difference to the HiPath Cordless IP synchronization over air, the Ethernet based synchronization mechanism (according IEE1588, PTP [[wpen:Precision_Time_Protocol|Precious Time Protocol]]) requires fewer configurations. <br>On the other hand, requirements are made on the Ethernet characteristics like loss, delay, jitter etc. Therefore special requirements regarding the Ethernet components (especially to the Ethernet switches) have to be considered. If these values (especially jitter) are bad Sync loses are likely.
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'''Summary:'''<br>
 
'''Summary:'''<br>
 
The main advantages of Synchronisation via LAN are:<br>  
 
The main advantages of Synchronisation via LAN are:<br>  

Revision as of 16:04, 7 March 2011