Communications device, infrastructure equipment, communications system and methods

2:

• An infrastructure equipment as claimed in claim 1, wherein the first configuration includes transmitting the signals with a first power, and transmitting the signals with the second configuration includes increasing the power of the signals above the first power to a second power to reduce a time of communicating a high priority message transmitted to the narrowband communications device.

3:

• An infrastructure equipment as claimed in claim 1, wherein the controller in combination with the transmitter and the receiver is configured
• to transmit signals on the down-link of the narrowband carrier to the narrow-band communications device with the second configuration in response to receiving a request to transmit the high priority message from the narrowband communications device.

4:

• An infrastructure equipment as claimed in claim 2, wherein the receiver is configured to receive a control message which represents the request to transmit the high priority message from the narrowband communications device.

5:

• An infrastructure equipment as claimed in claim 3, wherein the control message is a random access message which includes a predetermined number which indicates a request to transmit the high priority message.

6:

• An infrastructure equipment as claimed in claim 2, wherein a down-link of the one or more narrowband carriers is paired with an up-link of the narrowband carriers, and the controller is configured with the transmitter and the receiver to transmit the signals with the second configuration on the down-link of a narrowband carrier which is paired with the uplink on which the request to transmit the high-priority message is received.

7:

• An infrastructure equipment as claimed in claim 1, wherein the controller in combination with the transmitter and the receiver is configured to form a high priority narrowband carrier for the down-link and the uplink of the wireless access interface from one of the one or narrowband carriers, wherein the high priority narrowband subcarrier is the narrowband subcarrier in which signals are transmitted on the down-link with the second configuration to the narrowband communications device or one or more other narrowband communications devices.

8:

• An infrastructure equipment as claimed in claim 7, wherein the controller in combination with the transmitter is configured to transmit an indication and a location of the high priority narrowband carrier on system information broadcast to the narrowband communications devices.

9:

• An infrastructure equipment as claimed in claim 6, wherein the controller in combination with the transmitter is configured to transmit a synchronisation signal for each of the narrowband carriers, the narrowband communications devices being configured to search for the synchronisation signal to identify a narrowband carrier, wherein the first configuration includes a first synchronisation signal and the second configuration is a different synchronisation signal for the high priority narrowband carrier.

10:

• An infrastructure equipment as claimed in claim 1, wherein the one or more narrowband subcarriers includes a primary narrowband carrier, and the controller is configured with the transmitter to transmit an indication of the primary narrowband carrier, the narrowband communications devices being configured to transmit signals to or receive signals from the primary narrowband carrier before the high priority narrow band carrier or another narrowband carrier.

11:

• An infrastructure equipment as claimed in claim 6, wherein the controller and the transmitter are configured to transmit on the downlink of the high priority narrowband carrier a shortened synchronisation signal compared with a synchronisation signal transmitted on one or more other narrowband carriers.

12:

• An infrastructure equipment as claimed in claim 6, wherein the controller and the transmitter are configured to transmit on the downlink of the high priority narrowband carrier a shortened system information signal compared with a system information signal transmitted on one or more other narrowband carriers, the system information providing an indication of one or more parameters of the narrowband subcarrier.

15:

• A communications device as claimed in claim 14, wherein the first configuration includes transmitting the signals with a first power, and transmitting the signals with the second configuration includes increasing the power of the signals above the first power to a second power to reduce a time of communicating a high priority message transmitted to the narrowband communications device.

16:

• A communications device as claimed in claim 14, wherein the controller in combination with the transmitter and the receiver is configured
• to transmit a request to transmit the high priority message to the infrastructure equipment, and
• to receive signals on the down-link of the narrowband carrier which have been transmitted from the infrastructure equipment with an increased power in response to the infrastructure equipment receiving the request.

17:

• A communications device as claimed in claim 14, wherein the controller is configured to transmit a control message which represents the request to transmit the high priority message to the infrastructure equipment.

18:

• A communications device as claimed in claim 17, wherein the control message is a random access message which includes a predetermined number which indicates a request to transmit the high priority message.

19:

• A communications device as claimed in claim 17, wherein a down-link of the one or more narrowband carriers is paired with an up-link of the narrowband carriers, and the controller is configured with the transmitter and the receiver
• to transmit the request to transmit the high-priority message on the uplink which is paired with the downlink narrowband carrier on which the signals are received which have been transmitted by the infrastructure equipment with the second power.

20:

• A communications device as claimed in claim 15, wherein the controller in combination with the transmitter and the receiver is configured to form

21:

• A communications device as claimed in claim 15, wherein the controller in combination with the receiver is configured
• to receive an indication and a location of a high priority narrowband carrier, the high priority narrowband carrier being formed for the down-link and the uplink of the wireless access interface from one of the one or narrowband carriers, wherein the high priority narrowband subcarrier is the narrowband subcarrier in which signals are received on the down-link with the second power.

22:

• A communications device as claimed in claim 21, wherein the controller in combination with the receiver is configured to search for a synchronisation signal which is transmitted by the infrastructure equipment for each of the narrowband carriers, wherein the high priority narrowband carrier has a different synchronisation signal to the one or more other narrowband carriers.

23:

• A communications device as claimed in claim 15, wherein the controller in combination with the transmitter and the receiver is configured
• to receive an indication of that one of the one or more narrowband carriers is a primary narrowband carrier,
• to transmit signals to or receive signals from the primary narrowband carrier before the high priority narrow band carrier or another narrowband carrier.

24:

• A communications device as claimed in claim 15, wherein the controller is configured with the receiver to receive on the downlink of the high priority narrowband carrier a shortened synchronisation signal compared with a synchronisation signal transmitted on one or more other narrowband carriers.

25:

• A communications device as claimed in claim 17, wherein the controller and the transmitter are configured to receive on the downlink of the high priority narrowband carrier a shortened system information signal compared with a system information signal received on one or more other narrowband carriers, the system information providing an indication of one or more parameters of the narrowband subcarrier.

26-32. (canceled)