User Equipment, UE, comprising: transceiver circuitry configured to: receive, from a base station on a first serving cell, an uplink/downlink configuration for an unlicensed component carrier, U-CC, operating on a second serving cell that indicates, for radio frames transmitted on the second serving cell, which subframes are to be used for uplink transmissions and which subframes are to be used for downlink transmissions; receive a signal from the base station to notify the UE of a location on which to detect a CSI reference signal, CSI-RS, for use in measuring CSI values; and processing circuitry configured to measure channel state information, CSI, values based on downlink communications and to instruct the transceiver circuitry to communicate on a physical uplink shared channel, PUSCH, of the second serving cell, within subframes of the second serving cell as indicated in the uplink/downlink configuration, responsive to receiving a licensed assisted access, LAA, start notification signal from the base station subsequent to receiving the uplink/downlink configuration, wherein the LAA start notification signal indicates the start of a validation period; wherein the UE is further configured to transmit during the validation period according to the uplink/downlink configuration; and wherein: the CSI-RS includes one of a non-zero power CSI-RS, NZP- CSI-RS, and a zero-power CSI-RS, ZP-CSI-RS, and wherein the NZP-CSI-RS includes one of a Type 1 NZP-CSI-RS, which is received in a subframe that includes the LAA start notification signal and a Type 2 NZP-CSI-RS, which is received periodically. transceiver circuitry configured to: receive, from a base station on a first serving cell, an uplink/downlink configuration for an unlicensed component carrier, U-CC, operating on a second serving cell that indicates, for radio frames transmitted on the second serving cell, which subframes are to be used for uplink transmissions and which subframes are to be used for downlink transmissions; receive a signal from the base station to notify the UE of a location on which to detect a CSI reference signal, CSI-RS, for use in measuring CSI values; and receive, from a base station on a first serving cell, an uplink/downlink configuration for an unlicensed component carrier, U-CC, operating on a second serving cell that indicates, for radio frames transmitted on the second serving cell, which subframes are to be used for uplink transmissions and which subframes are to be used for downlink transmissions; receive a signal from the base station to notify the UE of a location on which to detect a CSI reference signal, CSI-RS, for use in measuring CSI values; and processing circuitry configured to measure channel state information, CSI, values based on downlink communications and to instruct the transceiver circuitry to communicate on a physical uplink shared channel, PUSCH, of the second serving cell, within subframes of the second serving cell as indicated in the uplink/downlink configuration, responsive to receiving a licensed assisted access, LAA, start notification signal from the base station subsequent to receiving the uplink/downlink configuration, wherein the LAA start notification signal indicates the start of a validation period; wherein the UE is further configured to transmit during the validation period according to the uplink/downlink configuration; and wherein: the CSI-RS includes one of a non-zero power CSI-RS, NZP- CSI-RS, and a zero-power CSI-RS, ZP-CSI-RS, and wherein the NZP-CSI-RS includes one of a Type 1 NZP-CSI-RS, which is received in a subframe that includes the LAA start notification signal and a Type 2 NZP-CSI-RS, which is received periodically.