- This topic has 12 replies, 1 voice, and was last updated 7 years, 2 months ago by BAKANIBONA Fabrice.
22nd November 2006 at 08:34 #46214vijayGuest
In my network drop due quality uplink is high which contributing around 45% of the network call drop. can anybody tell how to improve the network and what are methods to check
Details of my netwok
GSM 900/ 1800 Band – Ericsson network- 6,6,6 TRx configaration with 31 ARFCN in GSM 900 & 12 ARFCN in GSM 180023rd November 2006 at 09:07 #46215pixGuest
did you activate the UL power control and the DTX uplink ?
if no : activate them
if yes : check your UL power control thresholds (upper and lower), decrease those values by few dB in order to reduce the overall uplink noise in your network.24th November 2006 at 05:11 #46216VIJAYGuest
HI PIX THANKS FOR UR INFO
WE AHVE ALREADY ACTIVATED UL PWR CONTROL AND DTX UL
WE HAVE UL PWR CNTRL AS
SCTYPE SSDESUL SSLENUL LCOMPUL
ALL 92 3 10
QDESUL QLENUL QCOMPUL
40 3 50
are these parameters as correct24th November 2006 at 07:36 #46217IwanGuest
I Have same problem in my site high TDROP bad quality uplink.
Network GSM900 Band – Ericsson Metwork 2,2,2 TRX Configuration
Thanks,2nd May 2010 at 02:14 #46218JuanGuest
I have drops by LOWSS12th January 2011 at 10:14 #46219GoradaGuest
all BSC’s in my GSM 900 network are suffering from an increasing on TCH drop rate with bad quality up link and sudden reasons.
TCH drop rate 0.87% to 1.6%.
what do you think I have to do to improve it? by the way all power control parameters set correctly.12th January 2011 at 10:42 #46220SHELDONGuest
That is a huge increase. Are you absolutely sure no parameter has been changed (eg, BADQUL on the BSC)?
Let your BSS/Core network guys perform a synchronization audit.
If you’ve not already done so, please activate Interference Rejection Combining (IRC). It will definitely help with the uplink quality drops.
Regards28th April 2011 at 04:21 #46221taufikGuest
I have same problem with drop due to Bad Quality Uplink on GSM network and I try to swab layer between GSM and DCS and it work.3rd May 2011 at 12:56 #46222RamiGuest
Please check if ICM is active (Idle Channel Measurements)
ICM bands are used for prioritizing good quality channels for allocation first and keeping the bad ones as a last resort.
Good Luck4th May 2011 at 13:46 #46223SmartGuest
You should check the TA of drop calls. If your drop calls are at far places down tilt your antennas or if you dont want to loose coverage install TMA. TMAs will improve your UL strength.30th September 2011 at 13:11 #46224C.BalasubramanianGuest
How to improve the poor uplink in GSM network5th January 2012 at 20:02 #46225DGuest
ya i have got the result by power control
but some of cell having high ho failure19th February 2014 at 09:13 #46226BAKANIBONA FabriceGuest
I have the same problem on just one cell. Can someone help us?