| CPC H04W 72/23 (2023.01) [H04W 56/0045 (2013.01); H04W 72/0453 (2013.01); H04W 72/30 (2023.01); H04W 72/53 (2023.01); H04W 74/0833 (2013.01)] | 18 Claims |

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1. A method of operating a user equipment (UE) device, the method comprising:
receiving a control signal on an active first bandwidth part (BWP) of an active first cell, said control signal controlling the UE device to send a Physical Random Access Channel (PRACH) signal using a dormant second BWP corresponding to a dormant second cell;
receiving a first resource grant from a first base station of the active first cell granting resources for the dormant second BWP corresponding to the dormant second cell; and
using resources granted by the first resource grant to transmit or receive data in the dormant second cell.
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