A.1 Description of the procedure

3GPP44.006Data Link (DL) layer specificationMobile Station - Base Station System (MS - BSS) interfaceRelease 17TS

A.1.1 Procedure in the MS

The random access procedure is initiated by layer 3. The data link layer will receive the 8 bit information content of the random access burst in a DL‑RANDOM ACCESS‑REQUEST primitive. The primitive will also contain an indication of the type of channel to be used. The data link layer will then pass the information field to the indicated physical layer entity in a PH‑RANDOM ACCESS‑REQUEST primitive.

The physical layer will, upon sending the random access burst, send a PH‑RANDOM ACCESS‑CONFIRM primitive containing the time slot in which the burst was sent. This information is passed then to layer 3 in a DL‑RANDOM ACCESS‑CONFIRM primitive.

A.1.2 Procedure in the BS

The physical layer will provide the random access information field and an indication of the time slot in which the random access burst was received to the data link layer in a PH‑RANDOM ACCESS‑INDICATION primitive. The primitive will also contain an indication of the type of channel on which the burst was received. The data link layer will pass the information to layer 3 in a DL‑RANDOM‑ACCESS‑INDICATION primitive.