name: AGCH
full_form: Access Grant Channel
context: The logical control channels are defined in 3GPP TS 45.002[ None ]  [32]. In the following those control channels are considered which carry signalling information or specific types of user packet information: i) Broadcast Control CHannel (BCCH): downlink only, used to broadcast Cell specific information; ii) Synchronization CHannel (SCH): downlink only, used to broadcast synchronization and BSS identification information; iii) Paging CHannel (PCH): downlink only, used to send page requests to Mobile Stations (MSs); iv) Random Access CHannel (RACH): uplink only, used to request a Dedicated Control CHannel; v) Access Grant CHannel (AGCH): downlink only, used to allocate a Dedicated Control CHannel; vi) Standalone Dedicated Control CHannel (SDCCH): bi-directional; vii) Fast Associated Control CHannel (FACCH): bi-directional, associated with a Traffic CHannel; viii) Slow Associated Control CHannel (SACCH): bi-directional, associated with a SDCCH or a Traffic CHannel; ix) Cell Broadcast CHannel (CBCH): downlink only used for general (not point to point) short message information; x) Notification CHannel (NCH): downlink only, used to notify mobile stations of VBS (Voice Broadcast Service) calls or VGCS (Voice Group Call Service) calls. Two service access points are defined on signalling layer 2 which are discriminated by their Service Access Point Identifiers (SAPI) (see 3GPP TS 44.006[ None ]  [19]): i) SAPI 0: supports the transfer of signalling information including user-user information; ii) SAPI 3: supports the transfer of user short messages. Layer 3 selects the service access point, the logical control channel and the mode of operation of layer 2 (acknowledged, unacknowledged or random access, see 3GPP TS 44.005[ None ]  [18] and 3GPP TS 44.006[ None ]  [19]) as required for each individual message.
description: The Access Grant Channel (AGCH) is a downlink-only logical control channel used in the A/Gb mode of mobile radio interface Layer 3. Its primary function is to allocate a Dedicated Control Channel, facilitating communication between the network and mobile stations.
explanation: AGCH is classified as a Channel because it serves as a specific path for data transmission, enabling the allocation of dedicated control channels in response to random access requests from mobile stations.
section_title: 1.5 Use of logical channels in A/Gb mode
biotag_Context: O,O,O,O,O,O,O,B-Organization,B-Specification,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Connection,I-Connection,I-Connection,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,B-Procedure,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Procedure,I-Procedure,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Connection,I-Connection,I-Connection,I-Connection,O,O,O,O,O,B-Connection,O,O,O,O,O,B-Connection,I-Connection,I-Connection,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Service,O,B-Service,O,O,O,B-Service,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,I-Parameter,I-Parameter,I-Parameter,O,O,B-Organization,B-Specification,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Organization,B-Specification,O,O,O,O,O,B-Organization,B-Specification,O,O,O,O,O,O,O,O,O,O
biotag_Description: O,B-Connection,I-Connection,I-Connection,O,O,O,O,O,O,O,O,O,O,B-Mode,I-Mode,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O