Uplink Signal Starting Position in a Wireless Device and Wireless Network

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:
• receive one or more messages comprising configuration parameters of a licensed assisted access (LAA) cell;
• receive downlink control information (DCI) for the LAA cell, wherein the DCI comprises:
• a first field indicating uplink resources for an uplink subframe of the LAA cell;
• and
• a second field indicating that a starting position of the uplink subframe is based on a sum of a listen-before-talk (LBT) period and a timing advance value;
• generate one or more transport blocks based on the DCI;
• and
• transmit, using the uplink resources and starting from the starting position of the uplink subframe, the one or more transport blocks.

A system comprising:

• a base station comprising:
• one or more processors;
• and
• memory storing first instructions that, when executed by the one or more processors of the base station, cause the base station to:
• transmit one or more messages comprising configuration parameters of a licensed assisted access (LAA) cell;
• and
• transmit downlink control information (DCI) for the LAA cell, wherein the DCI comprises:
• a first field indicating uplink resources for an uplink subframe of the LAA cell;
• and
• a second field indicating that a starting position of the uplink subframe is based on a sum of a listen-before-talk (LBT) period and a timing advance value;
• and
• a wireless device comprising:
• one or more processors;
• and
• memory storing second instructions that, when executed by the one or more processors of the wireless device, cause the wireless device to:
• generate one or more transport blocks based on the DCI;
• and
• transmit, using the uplink resources and starting from the starting position of the uplink subframe, the one or more transport blocks.