Patent ID: 11864031
Assignee: ASUSTEK COMPUTER INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of a User Equipment (UE), comprising:
receiving, in a first cell, a signal to configure the UE to perform a Random Access Channel-less (RACH-less) handover to a second cell, wherein the signal comprises:
an uplink (UL) grant to be used in the second cell; and
an association between the UL grant and at least one downlink (DL) signal; and

determining, based upon a quality of the at least one DL signal, whether to (i) use the UL grant, comprised in the signal received in the first cell to configure the UE to perform the RACH-less handover, in the second cell to which the UE is to perform the RACH-less handover or (ii) initiate a random access procedure in the second cell, wherein the determining whether to use the UL grant in the second cell or initiate the random access procedure in the second cell is based upon whether the quality of the at least one DL signal, which is indicated in the signal received in the first cell and is associated with the UL grant comprised in the signal received in the first cell, exceeds a threshold quality, wherein the random access procedure is initiated in the second cell if none of the at least one DL signal is associated with a quality that exceeds the threshold quality, wherein the UL grant is used in the second cell to which the UE is to perform the RACH-less handover if the quality of the at least one DL signal does exceed the threshold quality, wherein the threshold quality is at least one of a threshold Synchronization Signal (SS)-Reference Received Signal Power (RSRP) or a threshold Channel State Information (CSI)-RSRP.