30 May
2012
30 May
'12
3:04 p.m.
Hi
I am studying the TCH channel, and read the BB source.
I find that
the structure of "TCH + SACCH" is depend on ts.that is when the timeslot
is even, the 12 of a TCH multiframes is SACCH,and the 25 is idle;and When
the timeslot is odd, the 25 of a TCH multiframes is SACCH,and the12 is idle.
is that right?
Yes
if that`s right, why ?
To share the load. So that the BTS doesn't have to process all the
SACCH of all the TCH at the same time.
I can`t find any Material about
GSM 05.02 Clause 7 Table 1 of 9, the SACCH/TF entries
Cheers,
Sylvain