UTRA Channels

UTRA FDD radio interface has logical channels, which are mapped to transport channels, which are again mapped to physical channels. Logical to Transport channel conversion happens in Medium Access Control (MAC) layer, which is a lower sublayer in Data Link Layer (Layer 2).

Logical Channels:
Broadcast Control Channel (BCCH), Downlink (DL)
Paging Control Channel (PCCH), DL
Dedicated Control Channel (DCCH), UL/DL
Common Control Channel (CCCH), UL/DL
Dedicated Traffic Channel (DTCH), UL/DL
Common Traffic Channel (CTCH), Unidirectional (one to many)

Transport Channels:
Dedicated Transport Channel (DCH), UL/DL, mapped to DCCH and DTCH
Broadcast Channel (BCH), DL, mapped to BCCH
Forward Access Channel (FACH), DL, mapped to BCCH, CCCH, CTCH, DCCH and DTCH
Paging Channel (PCH), DL, mapped to PCCH
Random Access Channel (RACH), UL, mapped to CCCH, DCCH and DTCH
Uplink Common Packet Channel (CPCH), UL, mapped to DCCH and DTCH
Downlink Shared Channel (DSCH), DL, mapped to DCCH and DTCH

Physical Channels:
Primary Common Control Physical Channel (PCCPCH), mapped to BCH
Secondary Common Control Physical Channel (SCCPCH), mapped to FACH, PCH
Physical Random Access Channel (PRACH), mapped to RACH
Dedicated Physical Data Channel (DPDCH), mapped to DCH
Dedicated Physical Control Channel (DPCCH), mapped to DCH
Physical Downlink Shared Channel (PDSCH), mapped to DSCH
Physical Common Packet Channel (PCPCH), mapped to CPCH
Synchronisation Channel (SCH)
Common Pilot Channel (CPICH)
Acquisition Indicator Channel (AICH)
Paging Indication Channel (PICH)
CPCH Status Indication Channel (CSICH)
Collision Detection/Channel Assignment Indication Channel (CD/CA-ICH)

UTRA Channels