- This topic has 15 replies, 1 voice, and was last updated 6 years ago by hem chander joshi.
17th December 2009 at 09:17 #60297campusGuest
having a lot of SDCCH drop and TCH drop in a particular site, i would ask about any corrélation between the SD and the TCH drop??
thank you..11th January 2010 at 05:17 #60298Deepak vermaGuest
I woud like to know the cause of sd drop,tch drop,sd congestion. so if u can solve ma problems then revert me with some detail of all these..
Deepak Verma12th January 2010 at 04:26 #60299FirasGuest
the relation is that what ever interference is impacting the TCH it for sure impact the SD as well, start by changing the frequencies especially the ones that are carrying the SD channels12th January 2010 at 08:54 #60300ShivamGuest
In addition to frequency check, also check for Hardware Alarms.18th February 2010 at 06:15 #60301qwertGuest
what is the dominant drop reasons (signal strenght, bad quality, TA,etc).18th February 2010 at 07:51 #60302campusGuest
signal strenght18th February 2010 at 12:39 #60303montyGuest
i am also working on eric sys and if drop is due to signal strength and quality then which para should be optimized if freq are ok9th April 2010 at 11:50 #60304vipin kumarGuest
can you give me description of cause of TCH DROP and SDCCH DROP12th April 2010 at 04:02 #60305m12Guest
Is your drop reason SS on UL, DL or BL?
If your frequency plan is OK (as well as Frequency Hopping parameters – if used)then probably the bad quality can be due to low Signal Strength which may be a result of coverage issues.
Hardware problems may be a cause to the bad quality drops experienced.
The solution to such problems may likely involve antenna physical parameters reviews including re-orientations, height reviews as well as tilt changes (depending on site location-urban/rural).
For the case of low UL SS drops you may need to boost your UL SS with a TMA.
m12.18th September 2010 at 16:12 #60306arun dubeyGuest
what is the basic difference between sdcch drop and tch drop17th April 2012 at 17:39 #60307gauravGuest
i m found mostly sites sdcch drop in Ericsson system but tch drop not found. plz give me the reason.
Gaurav22nd November 2012 at 09:48 #60308samGuest
may i know how to deal with bad quality drops in ul in ericson system… any parameter on which we can play.. or we can reduce the impact of ICM in tch drop.7th December 2012 at 15:44 #60309dhokkarGuest
how to resolve the Problem of Tch Drop,we have extended configuration for many RBS.27th December 2012 at 04:33 #60310Mr.DavidGuest
There are some reasons SDCCH Drop and TCH Drop in Ericsson and we can classified which are the main reason which contributed to related KPI or Performance.
SDCCH Drop that could lead by High Tch Congestion and Overshooting you can analyze by MRR and Physical Antenna audit.
Otherwise you can try to shifting SDCCH to another Channel Group ( CHGR )1st June 2014 at 07:42 #60311daoudGuest
can any one tell me that what does it mean SSBL in Drop due to Low SS BL