Methods and devices for transmitting device capability information

1. A method comprising:

receiving information indicating a first pair of threshold values of a plurality of pairs of threshold values;

associating the plurality of pairs of threshold values with a plurality of link failure causes;

measuring a first set of reference signals;

assessing a radio link quality based on the measurement of the first set of reference signals and the first pair of threshold values;

determining a link failure based on the radio link quality; and

transmitting a message including an indication of a link failure cause of the plurality of link failure causes, wherein the link failure cause is associated with the first pair of threshold values.

2. The method of claim 1 , wherein the plurality of pairs of threshold values are predefined.

3. The method of claim 1 , wherein the first pair of threshold values comprises an in-sync threshold value and an out-of-sync threshold value.

4. The method of claim 1 , wherein measuring the first set of reference signals comprises measuring the first set of reference signals for radio link monitoring, and the link failure comprises a radio link failure.

5. The method of claim 4 , further comprising receiving a request to report user equipment information, wherein:

transmitting the message comprises transmitting a user equipment information response message in response to reception of the request;

the indication of the link failure cause included in the user equipment information response message is an indication of a radio link failure cause; and

the radio link failure cause is associated with the first pair of threshold values.

6. The method of claim 4 , further comprising:

initiating a radio link failure timer based on a result from measuring the first set of reference signals, wherein the radio link failure is determined in response to expiration of the radio link failure timer; and

stopping the radio link failure timer in response to reception of an indication of a second set of reference signals for radio link monitoring.

7. The method of claim 1 , wherein the first set of reference signals comprises a non-zero transmit power channel state information-reference signal, a synchronization signal and physical broadcast channel block, or some combination thereof.

8. The method of claim 1 , wherein the first set of reference signals is associated with a set of downlink antenna ports, and the set of downlink antenna ports is associated with a set of serving physical downlink control channels.

9. The method of claim 1 , wherein a subset of the first set of reference signals is configured for radio link monitoring and beam failure detection.

10. The method of claim 1 , wherein measuring the first set of reference signals comprises measuring the first set of reference signals for beam failure detection, and the link failure comprises a beam failure.

11. The method of claim 10 , further comprising:

transmitting a beam failure recovery request in response to determining the beam failure; and

receiving a response to the beam failure recovery request.

12. The method of claim 11 , wherein the beam failure recovery request is transmitted on a physical uplink control channel resource.

13. The method of claim 11 , wherein the beam failure recovery request is transmitted on a physical random access channel resource.

14. The method of claim 1 , wherein the radio link quality is a first radio link quality and the link failure is a first link failure, and the method further comprises:

assessing a second radio link quality based on the measurement and a second pair of threshold values; and

determining a second link failure based on the second radio link quality,

wherein the link failure cause is associated with the first pair of threshold values and the second pair of threshold values.

15. An apparatus comprising:

a receiver that receives information indicating a first pair of threshold values of a plurality of pairs of threshold values;

a processor that:

associates the plurality of pairs of threshold values with a plurality of link failure causes;

measures a first set of reference signals;

assesses a radio link quality based on the measurement of the first set of reference signals and the first pair of threshold values; and

determines a link failure based on the radio link quality; and

a transmitter that transmits a message including an indication of a link failure cause of the plurality of link failure causes, wherein the link failure cause is associated with the first pair of threshold values.

16. The apparatus of claim 15 , wherein the plurality of pairs of threshold values are predefined.

17. The apparatus of claim 15 , wherein the first pair of threshold values comprises an in-sync threshold value and an out-of-sync threshold value.

18. The apparatus of claim 15 , wherein the processor measuring the first set of reference signals comprises the processor measuring the first set of reference signals for radio link monitoring, and the link failure comprises a radio link failure.

19. The apparatus of claim 18 , wherein the receiver receives a request to report user equipment information, wherein:

the transmitter transmitting the message comprises the transmitter transmitting a user equipment information response message in response to reception of the request;

the indication of the link failure cause included in the user equipment information response message is an indication of a radio link failure cause; and

the radio link failure cause is associated with the first pair of threshold values.

20. The apparatus of claim 18 , wherein the processor:

initiates a radio link failure timer based on a result from measuring the first set of reference signals, wherein the radio link failure is determined in response to expiration of the radio link failure timer; and

stops the radio link failure timer in response to reception of an indication of a second set of reference signals for radio link monitoring.