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Boniphace Meshacky.
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flavio
Guestdoes anybody knows if this formulae is correct? It concerns Ericsson equipment/counters.
[RA Failure] = RAACCFA/(CNROCNT+RAACCFA)
If so, what are the reasons that can lead a n/w to present bad performance, about 18-20% of failure rate?
It is present of Ericsson and Siemens nets.flavio
Guestadditionally, does it imply on any kind of bad end-user perception? which ones?
pix
Guestflavio,
can you write down the counters definitions (trigger messages ?)
flavio
Guestsorry but i don´t have anything but the formulae. i´ll try to find related document from the vendor.
Water
GuestHey guys!
The counters definitions are as follows:
RAACCFA:- this is incremented every time there is a failure in random accessCNROCNT:- this counter is incremented for all random access attemtps, failed or successful.
We have the same problem, there are some of our cells that register as low as 20% of random access success.
rala
GuestDear all,
How to see the random access fail in Alcatel network?
Thank you in acvance. 🙂
pix
Guestrandom access fail is counted as a SDCCH ASSIGNMENT UNSUCCESS (sdnaur)
in alcatel, the unsuccess varies between 5% and 20% in terrestrial-ABIS BTS, and it is about 50% for satellite ABIS BTS. Those are normal values.
Regards,
pixrala
GuestDear Pix,
a SDCCH ASSIGNMENT UNSUCCESS(sdnaur)is the counter or indicator in Alcatel?
I cannot search from the Alcatel customer doc.or is it the formular?
Regards,
pix
GuestRala,
open RNO, go to QOS INDICATORS, in the family SDCCH ASSIGN, subfamily UNSUCCESS CAUSES. You will find it here.It is an indicator.
The SDNAUR is the correct name :
SDCCH_assign_unsuccess_rate ( SDNAUR )
formula :
( ( [MC04] + ( [MC148 – MC01 – MC02 – MC149] + [MC149])) / [MC04 + MC148])rala
GuestOh, I see..
It’s the SDCCH access failures, right?Regards,
pix
Guesthooo, that’s a rookie mistake :
failure = radio failures + BSS failures
unsuccess = congestion rejects + radio failures + BSS failuresflavio
Guest5-20% are normal values for GSM, or it is vendor related? I checked Nokia performance and it is lower than 1%.
pix
Guestflavio,
it has nothing to do with the equipment performances. it has only to do with “how is computed this indicator ?”
Alcatel is taking into account ghost RACH, while I assume Nokia isn’t.Using the same QOS counters, the values should be quite close.
Regards,
PixPrakash
GuestCan any one give the formula for Access failure rate (CDMA)formula for Lucent and ZTE.
vinod
Guestwhat is the reasons for RACH FAILURE in gsm
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