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# Idle Time Slot for Abis

Viewing 5 posts - 1 through 5 (of 5 total)
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• #66751
Jonny Jacubs
Guest

Hi,

Can anyone help me how can we calculate the number of Idle time slot required for an Abis interface of GSM?

Regards,

Jonny

#66752
pix
Guest

Hi,

the Abis does not need any idle timselot. So the answer is “zero”.

I assume you want to compute how many Abis TS are used by the BTS, and how many are left ? Am I right ?

Regards
pix

#66753
vikas mishra
Guest

if i have one E1 in gsm and 6 TRU then how we calculate Idle time slot

#66754
Rafikul Haque
Guest

OML needs 1 timeslot (64kbps) = 4 sub timeslots (16kbps)
RSL for S4/4/4 = 6 timeslots (64kbps) = 24 sub timeslots (16kbps)
TCH for S4/4/4 = (12 TRXs x 8 TCHs) – (3 BCCHs) – (6 SDCCHs) = 87 sub

So you have 128-4-24-87=13 16k(4, 64k) ts for abis ts

#66755
Abhishek
Guest

4 for Synchronization
4 for OML
8 for TRx(2 for Rsl)
IF config is 2,2,2
4+4+(10*6)=68 are used
128-68=60 Idle Time slots

Viewing 5 posts - 1 through 5 (of 5 total)
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