Patent ID: 11889317
Assignee: MOTOROLA MOBILITY LLC
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A base station for wireless communication, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the base station to:
operate a first serving cell on a licensed carrier frequency and a second serving cell on an unlicensed carrier frequency;
perform a listen before talk (LBT) on the unlicensed carrier frequency for a first time duration;
determine that the unlicensed carrier frequency is free;
transmit an activation command on the first serving cell for receipt by a user equipment (UE), the activation command being configured to activate the UE to receive transmissions from the base station on the second serving cell; and
transmit after determining that the unlicensed carrier frequency is free, a reserve transmission on the unlicensed carrier frequency at least until the base station begins transmission of the activation command on the first serving cell.