1. A terminal device configured to operate in a wireless network configured to support communications with terminal devices using a primary component carrier operating on radio resources within a first frequency band and a secondary component carrier operating on radio resources within a second frequency band, wherein the wireless network supports a connected mode of operation in which terminal devices receive user-plane data from the wireless network using the primary and/or secondary component carrier and an idle mode of operation in which terminal devices do not receive user-plane data from the wireless network, the terminal device comprising: circuitry configured to receive first Radio Resource Control (RRC) signaling transmitted from the wireless network to the terminal device over the radio resources within the first frequency band, the first RRC signaling indicating a measurement configuration for making measurements of radio channel conditions for radio resources within the second frequency band, wherein the first frequency band is a licensed frequency band in the wireless network and the second frequency band is an unlicensed frequency band in the wireless network; identify the measurement configuration for making the measurements of radio channel conditions for radio resources within the second frequency band based on the first RRC signaling received from the wireless network, wherein the measurement configuration relates to at least measuring a signal strength received by the terminal device on the radio resources within the second frequency band; measure radio channel conditions for radio resources within the second frequency band in accordance with the measurement configuration; determine if the measurement of the signal strength comprising measurement of radio channel conditions meets a trigger criterion, and each time the trigger criterion is met, transmitting a measurement report to the network infrastructure equipment indicating that the trigger criterion has been met.