7696081888
CHANNEL COMBINATIONS:
The different channels mentioned above are grouped into what are called channel combination.
The four most common type of combination are listed below:
Fuli ratę Traffic channel combination -TCH8/FACCH Broad channel combination - BCCH + CCCH Dedicated channel combination - SDCCH8+SACCH8 Combined channel combination -
BCCH + CCCH + SDCCH4 + SACCH4
The channel combination pattem used us:
1. CELLS with single carrier:
Time slot 0 =BCCH+CCH+SDCCH4+SACCH4 Time slot 1-7 = TCH / FACCH + SACCH
2. CELLS with two carrier: for BCCH carrier
Time slot 0 =BCCH+CCCH
Time slot 1-7 = TCH / FACCH + SACCH For non-BCCH carrier time slot 0 = SDCCH8 +SACCH8
Time slots 1-7 = TCH / FACCH + SACCH
GSM NETWORK DIAGRAM:
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