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High HS/EUL/R99 drops on second carrier

Mehdi Belkadi - 6th August 2019  (09:11 GMT)


We have the same issue after adding U900 cells on mixed mode with GSM900 as 2nd or 3rd or 4th carrier.

Hs/Eul drop increase.

Ash - 15th February 2017  (07:10 GMT)

Hi, Very HS drops in our network(Ericsson System) in some nodes/cells are very high (No issue in R99 & voice) post dual carrier implementation, Could anyone plz help?

pix - 27th July 2012  (19:10 GMT)


thanks for the info, that's interesting !

Sergey - 27th July 2012  (05:26 GMT)

Which Vendor it is?
We had same problem in Ericsson.
Ask core team do they use direct tunneling for SGSN?
In our case Ericsson it was kind of bag- patch was loaded and drops became normal values-as 1st carrier.

pix - 29th April 2012  (13:41 GMT)

hello vas,

oh yes, it's data drops only.
I don't have any idea, but i'm very interested in this issue too. Let's hope someone will help :)


vas - 28th April 2012  (04:45 GMT)

hi pix,

all parameters and neighbours are same with 1st carrier. There is no problem with CS drops. only PS(hs/eul/r99) drops is high on 2nd carrier.


pix - 26th April 2012  (20:05 GMT)


check 2G & 3G neighbourhood (inc. and out.), CPICH power, trafic distribution... perhaps your second carrier is not taking much AMR traffic anyway, so the call drop% is not relevant.


vas - 25th April 2012  (05:43 GMT)

Dear All;

Data drops have increased after second carrier activation. 1st carrier statistics are normal but 2nd carrier sites have high drops. Could you please help?


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Last modified: 17 May 2017

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