EIMTA configuration for LTE in unlicensed spectrum

A method of wireless communication at a user equipment (UE) in communication with a base station employing a primary component carrier (PCC) in a licensed spectrum and a secondary component carrier (SCC) in an unlicensed spectrum, comprising:

• attempting to receive first configuration information from the base station on a particular unlicensed carrier, the first configuration information indicating a first downlink/uplink configuration for subframes of at least one frame on the particular unlicensed carrier of the base station, wherein the particular unlicensed carrier is the SCC;
• attempting to detect a start of the data transmission from the base station on the particular unlicensed carrier in a first frame;
• receiving a downlink subframe from the base station during the at least one frame on the particular unlicensed carrier in accordance with the first downlink/uplink configuration-when the attempt to receive the first configuration information is successful and when the attempt to detect the start of the data transmission is successful, the downlink subframe being an initial subframe of a data transmission and subsequent to the start of the indicated first downlink/uplink configuration;
• and
• communicating with the base station in a subframe of the at least one frame corresponding to an initial subframe in accordance with a default downlink/uplink configuration when the attempt to detect the start of data transmission is not successful.

A method of wireless communication at a base station employing a primary component carrier (PCC) in a licensed spectrum and a secondary component carrier (SCC) in an unlicensed spectrum, comprising:

• attempting to transmit first configuration information to a user equipment (UE) in a first frame on the PCC, the first configuration information indicating a first downlink/uplink configuration for subframes of at least one frame on a particular unlicensed carrier, wherein the particular unlicensed carrier is the SCC;
• attempting to transmit an indicator indicating a start of data transmission to the UE in accordance with the first downlink/uplink configuration on the particular unlicensed carrier;
• transmitting a downlink subframe to the UE during the at least one frame on the particular unlicensed carrier in accordance with the first downlink/uplink configuration when the attempt to transmit the first configuration information is successful and the attempt to transmit the indicator is successful, the downlink subframe being an initial subframe of a data transmission and subsequent to the start of the indicated first downlink/uplink configuration;
• and
• communicating with the UE in a subframe of the at least one frame corresponding to an initial subframe in accordance with a default downlink/uplink configuration when an attempt to transmit the indicator to the UE is not successful.

An apparatus for wireless communication, the apparatus being a user equipment (UE) in communication with a base station employing a primary component carrier (PCC) in a licensed spectrum and a secondary component carrier (SCC) in an unlicensed spectrum, comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to
• attempt to receive first configuration information in a first frame on the PCC from a base station, wherein the first configuration information indicates a first downlink/uplink configuration for subframes of at least one frame on a particular unlicensed carrier of the base station, wherein the particular unlicensed carrier is the SCC;
• attempt to detect a start of the data transmission from the base station on the SCC;
• receive a downlink subframe from the base station during the at least one frame on the particular unlicensed carrier in accordance with the first downlink/uplink configuration when the attempt to receive the first configuration information is successful and when the attempt to detect the start of the data transmission is successful, the downlink subframe being an initial subframe of a data transmission and subsequent to the start of the indicated first downlink/uplink configuration;
• and
• communicate with the base station in a subframe of the at least one frame corresponding to an initial subframe in accordance with a default downlink/uplink configuration when the attempt to detect the start of data transmission is not successful.

An apparatus for wireless communication, the apparatus being a base station employing a primary component carrier (PCC) in a licensed spectrum and a secondary component carrier (SCC) in an unlicensed spectrum, comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to
• attempt to transmit first configuration information to a user equipment (UE) in a first frame on the PCC, the first configuration information indicating a first downlink/uplink configuration for subframes of at least one frame on a particular unlicensed carrier, wherein the particular unlicensed carrier is the SCC;
• attempt to transmit an indicator indicating a start of data transmission to the UE in accordance with the first downlink/uplink configuration on the particular unlicensed carrier;
• transmit a downlink subframe to the UE during the at least one frame on the particular unlicensed carrier in accordance with the first downlink/uplink configuration when the attempt to transmit the first configuration information is successful and the attempt to transmit the indicator is successful, the downlink subframe being an initial subframe of a data transmission and subsequent to the start of the indicated first downlink/uplink configuration;
• and
• communicate with the UE in a subframe of the at least one frame corresponding to an initial subframe in accordance with a default downlink/uplink configuration when an attempt to transmit the indicator to the UE is not successful.