For Pix: PC and DL_quality

hi vanG,

there are no optimal values… there are default values, and then there are optimized values, for specific cells.

to make more agressive settings:
decrease L_RXLEV_DL_L by 3dB-to-6dB
decrease U_RXLEV_DL_L by 3dB-to-6dB
decrease A_LEV_PC by 1
And finally, reduce by “1” the parameters related to PC and which slow down PC command / ack messages. Unfortunately, i don’t recall their exact names. They contain the string “INT” and “ACK”.
Instead of 2 and 1, set 1 and 0 (ie. -1 for each of them).

And that’s about it.

cheers,
pix

hello,

if you are using hopping, then you can increase Offset_hopping, which will allow worse RXQUAL for PC and for HO, if the cell is using hoping.

It is very convenient.

For example:
l_rxqual_dl_p = 3 (acceptable rxqual in dl for PC)
l_rxqual_dl_h = 4 (threshold for HO qual in DL)

if you set offset_hopping = 1.5, then :
PC threshold = 3 + 1.5 = 4.5
HO threshold = 4 + 1.5 = 5.5

1 is standard.
value of 1.5 is “optimized”. A value > 1.5 is rather aggressive… Try steps of 0.2 (1.5, 1.7, 1.9…)

Cheers,
pix

Hi Pix,
I was tried to change the PC parameters for some cells with high DL quality drops but there is no improvement for them…
My current setting for this cells are :
A_LEV_PC (SACCH)=3
A_QUAL_PC (SACCH)=3
BS_P_CON_ACK (x 2 SACCH)=2
BS_P_CON_INTERVAL (x 2 SACCH)=1
EN_BS_PC =ENABLE
EN_MS_PC =ENABLE
L_RXLEVDLP (dBm)=-85
L_RXLEVULP (dBm) =-95
L_RXQUALDLP=2
L_RXQUALULP=2
MAX_POWER_INC (dB)=8
MAX_POWER_RED (dB)=4
MS_P_CON_ACK (x 2 SACCH)=2
MS_P_CON_INTERVAL (x 2 SACCH)=1
POW_INC_STEP_SIZE (dB)=6
POWER_INC_FACTOR =0.8
POWER_RED_FACTOR =0.5
POWER_RED_STEP (dB)=2
PWRC=NOT_INCLUDED
U_RXLEVDLP (dBm)=-75
U_RXLEVULP (dBm) =-85
U_RXQUALDLP=1
U_RXQUALULP=1
W_LEV_PC =1
W_QUAL_PC=1
Are they correct ?
Best regards,

>>rrb_bg