FACH and PCH congestion

[BryxKeisha]

Dear RF Experts,

How can I check for the usage and if there is any congestion on the FACH and PCH channels? Recently, we activated the feature Cell_PCH transition and I'd like to know if there is any counter related to them. Would like to ask for your help and guidance on how to optimize these features. Thanks and waiting for your comments.

[BryxKeisha]

By the way, vendor is Huawei...Thanks!

[BryxKeisha]

Guys, come on....nobody knows? Seriously? Need you help please...

[jayk]

Can Use these formulas to check FACH and PCH Utilization

FACH Utilization - 100*{VS.CRNCIubBytesFACH.Tx/measurement duration}/ VS.CRNC.IUB.FACH.Bandwidth
PCH Utilization - 100*{VS.CRNC.IubBytesPCH.tx/measurement duration}/ VS.CRNC.IUB.PCH.Bandwidth

VS.RRC.Paging1.Loss.PCHCong.Cell shows Paging loss due to PCH congestion, so PCH congestion can be reflected.


FACH congestion is shown by these counters.
VS.FACH.DCCH.CONG.TIME - Congestion Duration of DCCHs Carried over FACHs for Cell
VS.FACH.DTCH.CONG.TIME - Congestion Duration of DTCHs Carried over FACHs for Cell

Regards, jack.

[Raiesh Khan]

Thanks i am helpfull by this formula

[hilman]

Thanks for this formula.

[RFDude_PMA]

Hi Gurus..

Do you have similar formula for E*******? W10

[Muhammad Imran Rafique]

A relevant question here, i am really confused as we have introduced URA state. After this lot of FACH involvement is there, what is the theoretical limitation of FACH. I mean how many user can be accomodated and can transmit data simultaneously. I will really appreicate if someone can share practical experience and let us know where we can find in documents. (Alex).

Do we have counters avaialble in e******* to find out the FACH utilization, congestion.

BR//
Imran

[bluewaves2008]

thank you .....I am looking for a long time.

[chefo]

I am trying to evaluate the FACH performance as well (E******* W10), but there is no such counter as in Huawei for FACH Congestion Time. However I decided to look at the relevant counters/KPIs for Channel Switching from/to Cell-FACH, as well as the average number of users in Cell Fach:

pmSumFachPsIntRabEstablish / pmSamplesFachPsIntRabEstablish

This, considered with the RRC Setup Success Rate would give an indication if we have capacity issues with the FACH.

I have posted the KPI formulas here: http://www.finetopix.com/showthread.php?31133