Reducing SDCCH Drops

3G / 2G
,
1

Is there any parameter to reduce SDCCH drops?

2

Check which trx has good quality and the keep max SDCCH on it

3

It’s on the main trx

4

What is the reason of SDCCH Drop? If it is others, you can change confact from 4 to 2. If it is bad quality, you need to do as earlier advised i.e. Check which trx has good quality and the keep max SDCCH on it

5

BSC Level/Cell level
Check T305/T308 timers on BSC side. (Always rduce improved SD/TCH Drop)
check T3250/T3260/T3270 timers on Core side - setting 5 will improve SDR/CDR/CSSR if not set
check SACCHUL/SACCHDL (repetitive SACCH) setting at 2 will improve SDR

Cell level.

  1. reduce maxret to 1
  2. increase cchpwr to max on G900/G1800 to 43/30
  3. disable SHO
  4. Enable Advanced ps ul power control
  5. check interferences (AFP usually improve C/I/ CDR and SDR)
  6. check cross feeders/sector swaps
  7. check any paraameter /featere that improve UL and DL Interferences
  8. Reduce ABMAXTA to below 63
6

good day to all

please any support or assistance regarding the 2G Issue that related to suddenly high SDCCH drop rate in some cells after modernazation and there is not any change in parameters and the reason root cause is other , i am looking forword your quick responce to share your opinions with me .
thank you