- This topic has 7 replies, 1 voice, and was last updated 11 years, 5 months ago by Jacky.
15th July 2009 at 08:25 #57974JackyGuest
Hi all, i would ask about the T_GCH_Inactivity_Last Timer effect on the Atermux usage. we make a trial by reducing this timer and no improvment was seen on Atermux Ressources. is this normal?15th July 2009 at 11:58 #57975PixGuest
That timer is relevant only if EN_FAST_INITIAL_GPRS_ACCESS is disabled.
You should try to modify T_GCH_INACTIVITY instead, which would greatly reduce your GCH usage on ATER PS.
T_GCH_INACTIVITY > T_CANDIDATE_TBF_REALLOC (1 second) in all the cells of the BSS.
Pix15th July 2009 at 12:52 #57976JackyGuest
Thanks pix, but the EN_FAST_INITIAL_GPRS_ACCESS is already disabled in our network; concerning the T_GCH_Inactivity the recommended value by alcatel is 3s and if we change it to 2s i think that the impact would not be relevant. isnt’ it?17th July 2009 at 06:19 #57977PixGuest
The T_GCH_Inactivity_Last Timer is LESS effective that T_GCH_Inactivity Timer.
why don’t you just give it a try ?17th July 2009 at 08:21 #57978JackyGuest
ok i will try to change the T_GCH_Inactivity one and you’ll hear about the result 🙂27th August 2009 at 07:54 #57979JackyGuest
Hi pix, it tooks a long time :), ok we did the Trial and we observed higher LLC Traffic carried by the BSC, is this related to the T_GCH_Inactivity Timer change or normal behavior?27th August 2009 at 19:28 #57980PixGuest
By reducing the “idle” time of the GCH’s, they are then reallocated faster to “active” transfers. Therefore the efficiency of your Ater PS is higher.
It would be logical to observe such a phenomenom. Just to be sure, why don’t you roll back this timer to the previous value, and check if the traffic decrease ?
A field trial should always end with a roll back to initial value, in order to isolate the effect of the change vs. the natural evoution of network.
Pix28th August 2009 at 07:42 #57981JackyGuest
Thanks pix, we’ll see the impact of the Rollback, otherwise what are the other effects of reducing such timer: Higher Throuhput, low Ater congestion…?