Patent ID: 11963166
Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A method implemented in a radio base station, the method comprising:
transmitting to a user equipment a first-stage uplink resource scheduling message indicating uplink radio resources usable by the user equipment to perform an uplink transmission via an unlicensed cell,
transmitting to the user equipment a second-stage uplink resource scheduling message, which is related to the first-stage uplink resource scheduling message,
wherein the first-stage uplink resource scheduling message is valid or not depending on whether the uplink transmission from the user equipment has been triggered or not by another second-stage uplink resource scheduling message within a predetermined time period prior to reception of the second-stage uplink resource scheduling message at the user equipment, and
receiving the uplink transmission from the user equipment via the unlicensed cell.