03.643GPPGeneral Packet Radio Service (GPRS)Overall description of the GPRS radio interfaceStage 2TS
Table 2 lists the service primitives provided by the Physical Link layer to RLC/MAC layer. More detailed description is given in GSM 04.04 .
Table 2: Service primitives provided by the Physical link layer
Used to pass message units containing frames used for RLC/MAC layer respective peer‑to‑peer communications to and from the physical layer.
Used to request and confirm (in the MS) the sending of a random access frame and to indicate (in the network) the arrival of a random access frame.
Used to indicate that the physical connection on the packet data physical channel has been established.
Used by the physical layer to trigger, if applicable, piggy backing, the start of timer for the RLC/MAC layer and the forwarding a data unit to the physical layer
Used by the RLC/MAC layer to indicate that no frame has to be transmitted after receiving the PH‑READY‑TO‑SEND primitive