Carrier Activation in a Multi-Carrier Wireless Network

A method comprising:

• transmitting a message indicating that a wireless device supports configuration of:
• a licensed cell;
• and
• an unlicensed cell;
• receiving, during a first transmission time interval (TTI), a first activation command comprising at least one first parameter indicating, to the wireless device, to activate the licensed cell;
• receiving, during a second TTI, a second activation command comprising at least one second parameter indicating, to the wireless device, to activate the unlicensed cell;
• initiating, before a first maximum duration after the first TTI, channel monitoring on the unlicensed cell;
• and
• initiating, after the initiating channel monitoring on the unlicensed cell and before a second maximum duration after the second TTI, channel monitoring on the licensed cell, wherein the first maximum duration is different from the second maximum duration.

A wireless device comprising:

• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
• transmit at least one first message indicating that the wireless device supports configuration of:
• a licensed cell;
• and
• an unlicensed cell;
• receive, during a transmission time interval (TTI), an activation command comprising at least one parameter indicating, to the wireless device, to activate:
• the licensed cell;
• and
• the unlicensed cell;
• initiate, before a first maximum duration after the TTI, channel monitoring on the unlicensed cell;
• and
• initiate, after initiation of the channel monitoring on the unlicensed cell and before a second maximum duration after the TTI, channel monitoring on the licensed cell, wherein the first maximum duration is different from the second maximum duration.

A wireless device comprising:

• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
• transmit a message indicating that the wireless device supports configuration of:
• a licensed cell;
• and
• an unlicensed cell;
• receive, during a first transmission time interval (TTI), a first activation command comprising at least one first parameter indicating, to the wireless device, to activate the licensed cell;
• receive, during a second TTI, a second activation command comprising at least one second parameter indicating, to the wireless device, to activate the unlicensed cell;
• initiate, before a first maximum duration after the first TTI, channel monitoring on the unlicensed cell;
• and
• initiate, after initiation of the channel monitoring on the unlicensed cell and before a second maximum duration after the second TTI, channel monitoring on the licensed cell, wherein the first maximum duration is different from the second maximum duration.