Communications device, infrastructure equipment, core network part and methods

A method of communicating using a communications device registered in a first communications network and a second communications network, the first and second communications networks being cellular wireless communications networks, the method comprising:

• determining a plurality of time periods during which a downlink transmission for the communications device may be received in the first communications network according to a time divided schedule,
• transmitting an assistance information indication in the second communications network,
• controlling a receiver of the communications device to monitor a wireless access interface in the second communications network for a downlink transmission for the communications device at a first monitoring time, and
• transmitting in the second network an indication that the communications device is capable of transmitting the assistance information indication,
• wherein the assistance information indication is for the second communications network to select, as a first transmission time for transmitting the downlink transmission, the first monitoring time, such that the communications device is not prevented from receiving another downlink transmission for the communications device transmitted in the first communications network during one or more of the plurality of time periods, by monitoring the wireless access interface in the second communications network at the first monitoring time.