Communications device, infrastructure equipment, communications system and methods for downlink data transmission and acknowledgement

A communications device for transmitting data to or receiving data from a wireless communications network, the communications device comprising

• a transmitter configured to transmit signals to one or more infrastructure equipment of the wireless communications network via a wireless access interface,
• a receiver configured to receive signals from one or more of the infrastructure equipment of the wireless communications network via the wireless access interface, the one or more infrastructure equipment forming, with the wireless access interface, a radio access network for transmitting data to and receiving the data from the communications device, and a controller configured with the receiver
• to receive, from a first of the one or more infrastructure equipment, a radio network identifier allocated for identifying the communications device when allocating communications resources of the wireless access interface for transmitting data to or receiving data from the infrastructure equipment, and
• to control the transmitter and the receiver to enter an inactive connected state in which the receiver monitors signals representing downlink data transmitted from the first infrastructure equipment, the signals including the radio network identifier allocated by the first infrastructure equipment and to monitor signals transmitted from one or more other infrastructure equipment for determining whether the communications device should select a second of the one or more infrastructure equipment for receiving downlink data from the second of the one or more infrastructure equipment.

A communications device for transmitting data to or receiving data from a wireless communications network, the communications device comprising

• a transmitter configured to transmit signals to one or more infrastructure equipment of the wireless communications network via a wireless access interface,
• a receiver configured to receive signals from one or more of the infrastructure equipment of the wireless communications network via the wireless access interface, the one or more infrastructure equipment forming with the wireless access interface a radio access network, and a controller configured with the receiver
• to receive, from a first of the one or more infrastructure equipment, a radio network identifier allocated for identifying the communications device when allocating communications resources of the wireless access interface for transmitting data to or receiving data from the infrastructure equipment,
• to receive one or both of an indication of an acknowledgement preamble indicating an acknowledgement of a received data transmission when the communications device is in an inactive-connected state, or
• an indication of a negative acknowledgement preamble indicating a negative acknowledgement if a data transmission is not received when the communications device is in an inactive-connected state,
• to control the transmitter and the receiver to enter the inactive connected state in which the receiver monitors signals representing downlink data transmitted from the first infrastructure equipment and one or more other infrastructure equipment to determine whether the communications device should select one of the other infrastructure equipment or the first infrastructure equipment from which the communications device should receive the downlink data, and
• to transmit the acknowledgement preamble or the negative acknowledgement preamble after receiving control signals which include an identifier of the communication device.