Communications devices and methods for selecting a wireless access interface

A circuitry for a communications device for transmitting data to or receiving data from a mobile communications network, the mobile communications network including infrastructure equipment, the infrastructure equipment providing a plurality of wireless access interfaces for transmitting signals to or receiving signals from the communications device, the circuitry comprising:

• a transmitter configured to transmit signals representing the data via a serving wireless access interface provided by a selected infrastructure equipment to the mobile communications network,
• a receiver configured to receive signals representing the data via the serving wireless access interface provided by the selected infrastructure equipment,
• a controller configured to control the transmitter and the receiver to select one of the wireless access interfaces of the infrastructure equipment as the serving wireless access interface, wherein one or more of the selected infrastructure equipment or one or more neighbouring infrastructure equipment to the selected infrastructure equipment that are in the mobile communication network provide an enhanced wireless access interface providing a facility for transmitting or receiving signals with enhanced coverage relative to a wireless access interface which is not enhanced from the same selected infrastructure equipment, and the controller is configured in combination with the transmitter and the receiver
• to generate a signal reception metric for each of wireless access interfaces provided by the one or more neighbouring infrastructure equipment and for each of the wireless access interfaces provided by the selected infrastructure equipment, and
• to select or reselect one of the wireless access interfaces provided by the one or more neighbouring infrastructure equipment or one of the wireless access interfaces provided by the selected infrastructure equipment in accordance with predetermined criteria based on the generated signal reception metrics,
• wherein the circuitry is configured to measure a signal quality of the selected infrastructure equipment and the one or more neighbouring infrastructure equipment, or
• measure a signal quality provided from each of the one or more wireless access interfaces provided from the selected infrastructure equipment and the one or more neighbouring infrastructure equipment, and
• determine for each of the wireless access interfaces, the signal reception metric based on a difference between the measured signal quality and a predetermined minimum signal quality level associated with each of the wireless access interfaces,
• wherein the signal reception metric for the enhanced wireless access interface provided by the selected infrastructure equipment or the one or more neighbouring infrastructure equipment is derived using a predetermined minimum signal quality level,
• wherein the predetermined minimum signal quality level for the enhanced wireless access interface is lower than the predetermined minimum quality level for the wireless access interface which is not enhanced provided by the selected infrastructure equipment or the one or more neighbouring infrastructure equipment by an amount which is commensurate with an amount by which the enhanced wireless access interface provided by the selected infrastructure equipment or the one or more neighbouring infrastructure equipment provides a facility for transmitting or receiving the signals with enhanced coverage relative to the wireless access interface provided by the selected infrastructure equipment or the one or more neighbouring infrastructure equipment which is not enhanced.