Patent ID: 11917681
Assignee: SONY GROUP CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 20:
21. A non-transitory computer product containing a computer program causing a computer to operate as a user equipment (UE) and execute a process comprising:
setting a first resource and at least one second resource to transmit an uplink signal of a RACH procedure to a base station (BS), wherein
the first resource is selected from a set of resources set by information in an RRC layer,
the at least one second resource is designated by the BS for use by the wireless communication device in a case when the wireless communication device determines that the first resource is not available, the at least one second resource being designated by downlink information in a physical laver,
the downlink information in the physical layer being one of:
a notice of the one or more second resources in a channel occupancy time (COT), the notice being included in downlink control information (DCI), or
a slot format indicator (SFI) included in the DCI that identifies the one or more second resources, and

the first resource occurs before the at least one second resource;
determining whether the first resource is clear or busy;
upon determining that the first resource is busy, determining that the at least one second resource is clear; and
transmitting the uplink signal of the RACH procedure to the BS via the at least one second resource.