Apple Inc.
Random Access Procedures in New Radio Unlicensed Spectrum (NR-U)

Abstract:

A network, e.g. a New Radio network operating in the unlicensed spectrum, may reserve resources for the purpose of UE(s) performing a random access procedure (RACH) on the network. The network may indicate the resource reservation to the UE(s) in information transmitted to the UE(s) via signaling. The UE(s) may receive the information indicative of the resource reservation and may subsequently perform a RACH using the reserved resources indicated in the information received by the UE(s). The information or at least a portion of the information may be received in an initial signal, in a slot format indicator as part of downlink control information (DCI), in a wideband demodulation reference signal, in a radio network temporary identifier, and/or in radio resource control signaling.