Basic Function of Uplink & Downlink Transport Channel in LTE
Downlink Transport Channel
Broadcast Channel (BCH)
- A fixed TF
- Used for transmission of parts of BCCH, so called MIB
Paging Channel (PCH)
- Used for transmission of paging information from PCCH
- Supports discontinuous reception (DRX)
Downlink Shared Channel (DL-SCH)
- Main transport channel used for transmission of downlink data in LTE
- Used also for transmission of parts of BCCH, so called SIB
- Supports discontinuous reception (DRX)
Multicast Channel (MCH)
- Used to support MBMS
Uplink Transport Channel
Uplink Shared Channel (UL-SCH)
- Uplink counterpart to the DL-SCH
Random Access Channel(s) (RACH)
- Transport channel which doesn’t carry transport blocks
- Collision risk