| |
Direction
|
Logical Channel
|
PHY Channel
|
Function
|
|
Signaling
|
DL
|
PBCH
|
PBCCH
|
Packet Broadcast Control Channel :
Broadcast of packet data specific information
|
|
DL
|
PBCCH
|
Compact PBCCH |
|
DL
|
PCCCH
|
PPCH
|
Packet Paging Channel : Paging MSs for packet data and circuit switched services
|
|
UL
|
PRACH
|
Packet Random Access Chanel : MS initiates uplink transfer/Request GPRS Resource
|
|
DL
|
PAGCH
|
Packet Access Grant Channel : Resource assignment to an MS
|
|
DL/UL
|
PACCH |
Packet Access Control Channel : Associated with TBF (Temporary Block Flow) |
|
UL
|
PTCCH/U |
Packet Timing Advance Control Channel /Uplink : Transmit Random Access Burst to allow estimation of the timing advance |
|
DL
|
PTCCH/D |
Packet Timing Advance Control Channel /Downlink : Transmit Timing Advance updates |
|
UL
|
MPRACH |
Used during the initial counting procedure for MBMS |
|
DL
|
PNCH
|
Notifying PtM Packet Transfer
|
|
DL
|
CPPCH
|
Compact PPCH |
|
UL
|
CPRACH
|
Compact PRACH
|
|
DL
|
CPAGCH
|
Compact PAGCH
|
|
Traffic
|
DL/UL
|
PDTCH/D
|
DBPSCH/SBPSCH
|
Packet Data Transfer(multislot). GMSK, 8-PSK, 16 QAM, 32 QAM User Data
|
|
PDTCH/U
|
DBPSCH/SBPSCH
|
Packet Data Transfer(multislot). GMSK, 8-PSK, 16 QAM, 32 QAM User Data
|