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Reply To: Repeated FACH/SACH

#67033
pix
Guest

hi vanG,

I totally forgot…

For the repeated FACCH – impact is on the Outgoing HO Efficiency Rate, and possible on the RTCH Drop Rate.

Here are my recommendations, for RFACCH, to see if there is an impact or not:

EN_REP_DL_FACCH = 2: enabled for LAPDm command frames + LAPDm response frames

REP_DL_FACCH_LEGACY_SUPPORT = 1: repeated DL FACCH enabled for all AMR mobile stations

REP_DL_FACCH_THRES_AMR_FR = 8: 12,2 kbit/s

REP_DL_FACCH_THRES_AMR_HR = 5: 7,40 kbit/s

————————–
and for the RSACCH:

EN_REP_SACCH = 1: enabled

RADIOLINK_REP_DL_SACCH = 14

L_RXQUAL_DL_P_AMR_RXACCH = 3.5
L_RXQUAL_UL_P_AMR_RXACCH = 3.5

REP_DL_SACCH_THRES = 3
REP_UL_SACCH_THRES = 3
REP_DL_SACCH_WS = 10
REP_UL_SACCH_WS = 10

—————————

now, keep in mind that RxACCH will be visibly useful only if codec is changed to lower codecs (in FR, around 7kb/s, in HR around 4kb/s)
If you stay at 12.2kb/s, then the rep. xACCH will show no improvement at all !!

regards
pix