The future of modern mobile communications

GSM (Groupe Spéciale Mobile)



EDGE - Logical Channels


Within GPRS there are a number of new logical channels, similar to the existing ones, but these are only for GPRS. (NB These logical channels have been standardized.) The new logical channels have been mapped onto the physical channels that have been assigned for packet data, the physical channels denoted as Packet Data Channels (PDCH), the logical channels that are mapped onto these are :

  • Packet Common Control Channels
  • PRACH : Packet Random Access Channel (Uplink)
  • PPCH : Packet Paging Channel (Downlink)
  • PAGCH : Packet Access Grant Channel (Downlink)
  • PTCCH : Packet Timing advance Control Channel (Up/downlink)
  • PNCH : Packet Notification Channel (Downlink)Broadcast Channel
  • PBCCH : Packet Broadcast Control Channel (Downlink)Packet Traffic Channels
  • PDTCH : Packet Data Traffic Channel (Up/downlink)
  • PACCH : Packet Associated Control Channel (Up/downlink)