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Senior Member
Reputation: 379
IRAT Non Coverage Triggered -Event 3C
Hi,
Anyone can tell me more about hows IRAT triggered by event3c please?
Vendor: huawei
thank you
Default Password:finetopix
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2011-10-06 04:11 PM
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Member
Reputation: 68
Re: IRAT Non Coverage Triggered -Event 3C
Originally Posted by
kentck86
Hi,
Anyone can tell me more about hows IRAT triggered by event3c please?
Vendor: huawei
thank you
when the Ec/No and (OR RSCP) thresholds for iRAT are satisfied, event 3C will be trigerred, the UE will enter the compressed mode to start the measurements of other technology, it will measure the RSSI of the neighbors defined in the database...good enough?
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Senior Member
Reputation: 379
Re: IRAT Non Coverage Triggered -Event 3C
Originally Posted by
white_Noise
when the Ec/No and (OR RSCP) thresholds for iRAT are satisfied, event 3C will be trigerred, the UE will enter the compressed mode to start the measurements of other technology, it will measure the RSSI of the neighbors defined in the database...good enough?
Thank you for your reply, as in this case is a non-coverage based IRAT triggering as where both EcNo and RSCP does not satisfy the event2d threshold. Looking forward for further input from all.
Default Password:finetopix
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Member
Reputation: 172
1 out of 1 members found this post helpful.
Re: IRAT Non Coverage Triggered -Event 3C
Originally Posted by
kentck86
Hi,
Anyone can tell me more about hows IRAT triggered by event3c please?
Vendor: huawei
thank you
Doesn't matter the vendor this is 3gpp (25.331) and is use when you have event-triggering mode during compressed mode. In other words when UE enters compressed mode and start measuring target GSM cells it takes into consideration only their GSM RxLevel and if it is above particular threhold will report event 3C following by RNC command for IRAT to that cell.
For Huawei:
Event 3C is triggered on the basis of the following formula:
MOtherRAT + CIOOtherRAT ≥ TOtherRAT + H3c/2
Where,
l MOtherRAT is the measurement value of the cell (in another RAT) in the reporting range.
l CIOOtherRAT is the cell individual offset value of the cell (in another RAT) in the reporting range, which is equal to the sum of CIO and CIOOffset.
l TOtherRAT is the absolute inter-RAT handover threshold. Based on different service types (CS , PS domain R99 service, or PS domain HSPA service), this threshold can be configured through the following parameters:
− TargetRatCsThd
− InterRATNCovHOPSThd
l H3c is 3C hysteresis, the hysteresis value of event 3C.
l For the PS and CS combined services, the threshold(s) for CS services is (are) used
More info in the spec.
BR
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Re: IRAT Non Coverage Triggered -Event 3C
Originally Posted by
kentck86
Hi,
Anyone can tell me more about hows IRAT triggered by event3c please?
Vendor: huawei
thank you
Try this documents,
55796577 WCDMA Interat Hand Over | Scribd
Regards,
dadiono
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