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24th September 2011 at 17:06 #67273timroyGuest
In NSN or other vendors as well,
TCH Cong/block can cause SDCCH Drop?
or SDCCH will be released as normal.
What about Queuing & Directed retry? SDCCH drop can be decreased by these features if TCH COng cause SDCCH drop?
Thanks/Regards24th September 2011 at 19:02 #67274AlonewolvesGuest
There will be SD drop in case of TCH congestion.
here is the formula you can calculate SD drop Without TCH congesiton :
/ (SDCCH_HO_SEIZ+SDCCH_ASSIGN)25th September 2011 at 10:47 #67275timroyGuest
Its sdr_4 formula in netact i guess and no other formula with ”due to tch cong”..
whats the counter of SDCCH drop due to TCH cong?
Because I thought that if the call in SDCCH phase and no free TCH channel, it will be released but which counter will work? SDCCH_Radio_Fail or Abis??
or nothing? just release30th September 2011 at 16:29 #67276no nokiaGuest
nobody from NSN ?5th October 2011 at 14:15 #67277saurabh srivastavaGuest
Add trx & shift the traffic on other site & check the no. of given sdcch o site5th October 2011 at 19:58 #67278pionglyGuest
I don’t think your approach is correct
If no tch are free this will cause tch block, but all the procedure on sd channell is all done, so the sd will be simply released
Sd drop is related to incapacity to complete the tch request channel , on sd channel. if the tch is not available this is not a sd problem