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1. WO2017167571 - COMMUNICATIONS DEVICE, INFRASTRUCTURE EQUIPMENT AND METHOD

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS

What is claimed is:

1. A communications device configured to communicate with an infrastructure equipment forming part of a mobile communications network, and to communicate with one or more relay nodes of the mobile communications network, wherein the communications device comprises

a receiver configured to receive signals on the downlink from the one or more relay nodes via a first wireless interface, and to receive signals on the downlink from the infrastructure equipment via a second wireless access interface,

a transmitter configured to transmit signals on the uplink to the one or more relay nodes via the first wireless access interface, and to transmit signals on the uplink to the infrastructure equipment via the second wireless access interface, and

a controller configured to control the receiver to receive the signals and to control the transmitter to transmit the signals, wherein the controller is configured in combination with the receiver and the transmitter in a first mode of operation to perform one or more of

transmitting signals representing data via the first wireless access interface to one of the relay nodes for transmission via the second wireless access interface to the infrastructure equipment, and receiving signals representing data via the second wireless access interface from the infrastructure equipment via the first wireless access interface from the one of the relay nodes, and in response to predetermined conditions to switch to a second mode of operation, in the second mode of operation performing one or more of

transmitting signals representing data via the second wireless access interface to the infrastructure equipment, and receiving signals representing data via the second wireless access interface from the infrastructure equipment.

2. A communications device as claimed in Claim 1 , wherein the predetermined conditions comprise the reception of a fallback indication, the fallback indication indicating to the communications device should switch to the second mode of operation.

3. A communications device as claimed in Claim 2, wherein the communications device is configured

to receive from the infrastructure equipment via the one of the relay nodes a paging message, the paging message including the fallback indication, and

to transmit to the infrastructure equipment a paging response message, the paging response message indicating that the communications device has received the paging message including the fallback indication.

4. A communications device as claimed in Claim 1 , wherein the predetermined conditions comprise an initiation of a service having a Quality of Service, QoS, requirement of greater than a predetermined threshold.

5. A communications device as claimed in Claim 4, wherein the predetermined conditions comprise an initiation of a voice call via the infrastructure equipment.

6. A communications device as claimed in Claim 1, wherein the predetermined conditions comprise an initiation of a service with a throughput of signals representing data being higher than a predetermined threshold.

7. A communications device as claimed in Claim 1 , wherein the predetermined conditions comprise an initiation of a service with a latency of signals representing data being lower than a predetermined threshold.

8. A communications device as claimed in Claim 1, wherein the predetermined conditions comprise an initiation of a service with a reliability requirement of signals representing data being higher than a predetermined threshold.

9. A communications device as claimed in Claim 1 , wherein the predetermined conditions comprise the reception of an indication that system information has been updated on the second wireless access interface.

10. A communications device as claimed in Claim 9, wherein upon completion of acquisition of the updated system information on the second wireless access interface, the communications device is configured to switch to the first mode of operation.

11. A communications device as claimed in Claim 1 , wherein the second wireless access interface has a relative capability higher than a relative capability of the first wireless access interface.

12. A communications device as claimed in Claim 1, wherein the communications device and the one or more relay nodes each have a unique Universal Integrated Circuit Card, UICC, identity.

13. A communications device as claimed in Claim 1, wherein the communications device and the one or more relay nodes each have a unique Subscriber Identity Module, SIM, identity.

14. An infrastructure equipment forming part of a mobile communications network configured to communicate with a communications device, and to communicate with one or more relay nodes of the mobile communications network, wherein the infrastructure equipment comprises

a receiver configured to receive signals on the uplink from the one or more relay nodes via a second wireless access interface of the mobile communications network, and to receive signals on the uplink from the communications device via the second wireless access interface,

a transmitter configured to transmit signals on the downlink to the one or more relay nodes via the second wireless access interface, and to transmit signals on the downlink to the communications device via the second wireless access interface, and

a controller configured to control the receiver to receive the signals and to control the transmitter to transmit the signals, wherein the controller is configured in combination with the receiver and the transmitter in a first mode of operation to perform one or more of

transmitting signals representing data via the second wireless access interface to one of the relay nodes for transmission via a first wireless access interface to the communications device, and receiving signals representing data via the first wireless access interface from the communications device via the second wireless access interface from the one of the relay nodes, and in response to predetermined conditions to switch to a second mode of operation, in the second mode of operation performing one or more of

transmitting signals representing data via the second wireless access interface to the

communications device, and receiving signals representing data via the second wireless access interface from the communications device.

15. An infrastructure equipment as claimed in Claim 14, wherein the predetermined conditions comprise the transmission of a fallback indication, the fallback indication indicating to the

communications device that it should switch to the second mode of operation.

16. An infrastructure equipment as claimed in Claim 15, wherein the infrastructure equipment is configured

to transmit to the communications device via the one of the relay nodes a paging message, the paging message including the fallback indication, and

to receive from the communications device a paging response message, the paging response message indicating that the communications device has received the paging message including the fallback indication.

17. An infrastructure equipment as claimed in Claim 16, wherein the paging message including the fallback indication is transmitted to the communications device via the one of the relay nodes in response to receiving from a second communications device signals representing data to be transmitted to the first communications device, wherein the connection between the first communications device and the one of the relay nodes is a non-optimal physical channel.

18. An infrastructure equipment as claimed in Claim 17, wherein a required transmission power of the signals representing the data is higher than a transmission power supported by the connection between the first communications device and the one of the relay nodes.

19. An infrastructure equipment as claimed in Claim 17, wherein a complexity of the signals representing the data is higher than a complexity of signals that are supported by the connection between the first communications device and the one of the relay nodes.

20. A method of controlling communications in a mobile communications network, the mobile communications network comprising one or more communications devices, one or more relay nodes and an infrastructure equipment, the method comprising

in a first mode of operation, performing one or more of

transmitting signals representing data via a first wireless access interface to one of the relay nodes for transmission via a second wireless access interface to the infrastructure equipment, and receiving signals representing data via the second wireless access interface from the infrastructure equipment via the first wireless access interface from the one of the relay nodes,

switching, in response to predetermined conditions, to a second mode of operation, wherein in the second mode of operation, performing one or more of

transmitting signals representing data via the second wireless access interface to the infrastructure equipment, and receiving signals representing data via the second wireless access interface from the infrastructure equipment.

21. Circuitry for a communications device configured to communicate with an infrastructure equipment forming part of a mobile communications network, and to communicate with one or more relay nodes of the mobile communications network, wherein the communications device comprises

a receiver configured to receive signals on the downlink from the one or more relay nodes via a first wireless interface, and to receive signals on the downlink from the infrastructure equipment via a second wireless access interface,

a transmitter configured to transmit signals on the uplink to the one or more relay nodes via the first wireless access interface, and to transmit signals on the uplink to the infrastructure equipment via the second wireless access interface, and

a controller configured to control the receiver to receive the signals and to control the transmitter to transmit the signals, wherein the controller is configured in combination with the receiver and the transmitter in a first mode of operation to perform one or more of

transmitting signals representing data via the first wireless access interface to one of the relay nodes for transmission via the second wireless access interface to the infrastructure equipment, and receiving signals representing data via the second wireless access interface from the infrastructure equipment via the first wireless access interface from the one of the relay nodes, and in response to predetermined conditions to switch to a second mode of operation, in the second mode of operation performing one or more of

transmitting signals representing data via the second wireless access interface to the infrastructure equipment, and receiving signals representing data via the second wireless access interface from the infrastructure equipment.

22. Circuitry for an infrastructure equipment forming part of a mobile communications network configured to communicate with a communications device, and to communicate with one or more relay nodes of the mobile communications network, wherein the infrastructure equipment comprises

a receiver configured to receive signals on the uplink from the one or more relay nodes via a second wireless access interface of the mobile communications network, and to receive signals on the uplink from the communications device via the second wireless access interface,

a transmitter configured to transmit signals on the downlink to the one or more relay nodes via the second wireless access interface, and to transmit signals on the downlink to the communications device via the second wireless access interface, and

a controller configured to control the receiver to receive the signals and to control the transmitter to transmit the signals, wherein the controller is configured in combination with the receiver and the transmitter in a first mode of operation to perform one or more of

transmitting signals representing data via the second wireless access interface to one of the relay nodes for transmission via a first wireless access interface to the communications device, and receiving signals representing data via the first wireless access interface from the communications device via the second wireless access interface from the one of the relay nodes, and in response to predetermined conditions to switch to a second mode of operation, in the second mode of operation performing one or more of

transmitting signals representing data via the second wireless access interface to the

communications device, and receiving signals representing data via the second wireless access interface from the communications device.