Patent ID: 11864242
Assignee: NOKIA TECHNOLOGIES OY
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A client device, comprising:
at least one processor; and
at least one memory storing instructions that, when executed by the at least one processor, cause the client device at least to:
receive at least one dedicated random access channel, RACH, preamble indication from a network node device having contention free random access, CFRA, resources configured for at least one synchronization signal block, SSB, or at least one channel state information-reference signal, CSI-RS;
trigger a random access procedure;
check if reference signal received strengths, RSRPs, of at least one SSB and/or of at least one CSI-RS are above, equal to, or below a threshold, wherein at least one SSB or at least one CSI-RS is associated with the CFRA resources;
if all the RSRPs are below or equal to the threshold, select an SSB or CSI-RS following a predefined rule, and perform the CFRA on the selected SSB or CSI-RS when the selected SSB or CSI-RS is associated with the CFRA resources; and
if the RSRP of any of the SSBs or CSI-RSs is above the threshold, perform the CFRA on one of the SSBs or CSI-RSs that is above the threshold, when the SSBs or the CSI-RSs are associated with the CFRA resources;
receive a backoff indicator, BI, in a random access response from the network node device; and
in case the client device performs a reattempt preamble transmission, perform the CFRA in response to RSRP of the CFRA resources being below or equal to the threshold and in response to the CFRA resources being configured by the network node device.