An infrastructure equipment for forming part of a wireless communications network for transmitting data to and receiving data from a communications device, the infrastructure equipment comprising: a transmitter unit configured to transmit signals to the communications device in accordance with a wireless access interface, and a receiver unit configured to receive signals from the communications deice via the wireless access interface, and a controller configured to control the receiver unit to receive one or more signalling messages from the communications device, and the transmitter unit to transmit one or more signalling messages to the communications device, to establish a communications context for communicating data packets using a packet communications bearer from the communications device via the wireless communications network when the communications device is operating in a connected state, and to release the communications context and the packet communications bearer, when the communications device changes in an idle state, characterised in that the controller is configured in combination with the transmitter to transmit signalling information providing an indication of a plurality of power saving states (670, 672, 674), each of the power saving states providing an associated set of one or more functions performed by the communications device which the communications device is able to change in a power saving state to reduce power consumed by the communications device when entering the power saving state from either the idle state or the connected state, to the effect that, when the communications device is in either the idle state or the connected state, the communications device is able to enter one of the plurality of power saving states in which the one or more of the operations performed by the communications device are configured in accordance with the indication of the changed functions indicated by the signalling information transmitted to the communications device, and to transmit a signalling message to the communications device to instruct the communications device to enter one of the plurality of power saving states. a transmitter unit configured to transmit signals to the communications device in accordance with a wireless access interface, and a receiver unit configured to receive signals from the communications deice via the wireless access interface, and a controller configured to control the receiver unit to receive one or more signalling messages from the communications device, and the transmitter unit to transmit one or more signalling messages to the communications device, to establish a communications context for communicating data packets using a packet communications bearer from the communications device via the wireless communications network when the communications device is operating in a connected state, and to release the communications context and the packet communications bearer, when the communications device changes in an idle state, characterised in that the controller is configured in combination with the transmitter to transmit signalling information providing an indication of a plurality of power saving states (670, 672, 674), each of the power saving states providing an associated set of one or more functions performed by the communications device which the communications device is able to change in a power saving state to reduce power consumed by the communications device when entering the power saving state from either the idle state or the connected state, to the effect that, when the communications device is in either the idle state or the connected state, the communications device is able to enter one of the plurality of power saving states in which the one or more of the operations performed by the communications device are configured in accordance with the indication of the changed functions indicated by the signalling information transmitted to the communications device, and to transmit a signalling message to the communications device to instruct the communications device to enter one of the plurality of power saving states.