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