Scheduling an Uplink Transmission Over an Unlicensed Radio Resource

A scheduling node in a wireless communication system for scheduling an uplink transmission on an unlicensed radio resource, the scheduling node comprising communication circuitry and processing circuitry whereby the scheduling node is configured to:

• detect whether or not the scheduling node has transmitted or scheduled to receive on the unlicensed radio resource in a subframe;
• and
• transmit a joint grant with a grant delay that is based on whether or not the scheduling node has transmitted or scheduled to receive on the unlicensed radio resource in a subframe according to the detecting, wherein the grant delay is a delay between transmission of the joint grant and an earliest one of multiple subframes granted by the joint grant for uplink transmission on the unlicensed radio resource.

A method performed by a scheduling node in a wireless communication system for scheduling an uplink transmission on an unlicensed radio resource, the method comprising:

• detecting whether or not the scheduling node has transmitted or scheduled to receive on the unlicensed radio resource in a subframe;
• and
• transmitting a joint grant with a grant delay that is based on whether or not the scheduling node has transmitted or scheduled to receive on the unlicensed radio resource in a subframe according to the detecting, wherein the grant delay is a delay between transmission of the joint grant and an earliest one of multiple subframes granted by the joint grant for uplink transmission on the unlicensed radio resource.