Channel Mapping for GSM
Refer to 44.060 for details
|
Direction |
Logical Channel |
PHY Channel |
Function |
|
|
Signaling |
DL |
BCH |
FCCH |
Frequency correction |
|
SCH |
Frame synchronisation + BSIC |
|||
|
BCCH |
Broadcast of cell information, e.g. channel combination |
|||
|
DL |
CCCH |
PCH |
Paging mobiles |
|
|
UL |
RACH |
Requesting dedicated channel |
||
|
DL |
AGCH |
Access Grant Channel/Allocating dedicated/traffic CH |
||
|
DL |
NCH |
Notifying MSs (for VGCS & VBC) |
||
|
DL/UL |
DCCH |
SDCCH |
Signalling between MS and BTS |
|
|
SACCH |
Measurements, TA, Power Control, ... |
|||
|
FACCH |
Extra signalling within 26 TDMA Multiframe |
|||
|
Traffic |
DL/UL |
TCH/F |
DBPSCH |
full rate traffic channel (GMSK) |
|
TCH/H |
DBPSCH |
half rate traffic channel (GMSK) |
||
| E-TCH |
DBPSCH |
Carries 8-PSK user data |