enhanced handover success rate (facch repetition)

Enhanced Handover Success Rate (FACCH repetition)Slide title 70 pt CAPITALS Slide subtitle minimum 30 pt
Enhanced Handover Success Rate (FACCH repetition)
Field Acceptance tests Report for Enhanced Handover Success Rate (FACCH Repetition) MARSE06 010213
2013-02-01
, Rev
Field Acceptance tests Report for Enhanced Handover Success Rate (FACCH Repetition) MARSE06 010213 | Ericsson Internal | , Rev | 2013-02-01 | Page *
introduction
Enhanced Handover Success Rate increases the number of successful handovers. This is accomplished by enhancing the handover procedure with the 3GPP standardized repeated FACCH function and automatic reestablishment on the original channel in case of failure.
Benefits
Increased number of successful handovers due to a more robust signalingchannel.
Reduced number of calls lost during handover
Rel-06 terminals are required to support this feature.
Feature has been activated in cluster marse06 since 10th January 2013
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Retainability performance
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Handover performance
No improvement in Handover Success rate, as expected from this feature or even slight degradation.
No reduction in the volume of Handover drops or Handover failures either
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Handover success - cell
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Handover performance - cell
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conclusions
Data collected from live networks points to that 90-95% of all terminals hear one of the five first instances of the handover command. This means that for them there is no impact from repeated FACCH while the ones located in more difficult areas will automatically enjoy the benefits of a more robust signaling channel.
According with this, around 10% of the total HO Lost Rate could be expected to be recovered with this feature. So, cells with 10 HO lost per day, one could be expected to be saved.
In this trial cluster, marse06, no significant benefit has been measured.
Another areas might, however show more improvement with this feature.
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2013-02-01
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enhanced handover success rate (facch repetition)

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