Radio link failure (RFL) procedure with generic cell group management

1. A method for wireless communications at a user equipment (UE), comprising:

detecting a radio link failure condition for a connection between the UE and a network over a first cell group;

determining, in response to detecting the radio link failure condition, whether an air interface resource allocation is available for a signaling radio bearer (SRB) between the UE and the network over another cell group; and

selecting, based at least in part on the determination, one of a plurality of radio link failure procedures.

2. The method of claim 1 , further comprising:

identifying a type of the first cell group as one of: a controlling cell group (CCG) or a non-controlling cell group (NCCG); and

wherein selecting one of the plurality of radio link failure procedures is further based on the type of the first cell group.

3. The method of claim 1 , wherein selecting one of the plurality of radio link failure procedures further comprises:

selecting a first radio link failure procedure in response to determining that the air interface resource allocation for the SRB between the UE and the network over the another cell group is not available; and

performing the first radio link failure procedure, wherein the first radio link failure procedure comprises a full release of radio resources between the UE and the network.

4. The method of claim 3 , wherein performing the first radio link failure procedure further comprises:

suspending all radio bearers of the UE; and

resetting media access control (MAC) settings of the UE.

5. The method of claim 3 , wherein performing the first radio link failure procedure further comprises one or more of:

releasing all secondary cells (SCells) associated with the first cell group; or; and

releasing all other cell groups associated with the connection.

6. The method of claim 1 , wherein selecting one of the plurality of radio link failure procedures comprises:

selecting a second radio link failure procedure in response to determining that the air interface resource allocation for the SRB between the UE and the network is available over a second cell group; and

performing the second radio link failure procedure, wherein the second radio link failure procedure comprises a partial release of radio resources between the UE and the network.

7. The method of claim 6 , wherein performing the second radio link failure procedure further comprises:

transmitting an indication of the radio link failure condition to the another cell group using the SRB.

8. The method of claim 6 , wherein the SRB comprises one of a split SRB associated with the first cell group and the second cell group or an SRB configured on the second cell group.

9. The method of claim 6 , wherein performing the second radio link failure procedure further comprises one or more of:

suspending all data radio bearers (DRBs) associated with the first cell group;

suspending transmissions on resources of the first cell group; and

resetting a media access control (MAC) entity corresponding to the first cell group.

10. The method of claim 1 , wherein the connection is associated with signaling radio bearers comprising one or more of a direct SRB, a split SRB, a direct data radio bearer (DRB), and a split DRB.

11. The method of claim 1 , wherein determining whether the air interface resource allocation is available further comprises:

determining that the air interface resource allocation is not available when an SRB is not configured for a radio link control (RLC) or a media access control (MAC) on the another cell group; or

determining that the air interface resource allocation is not available when a resource allocation for the SRB is not activated on the another cell group.

12. An apparatus for wireless communications at a user equipment (UE), comprising: a processor, memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to:

detect a radio link failure condition for a connection between the UE and a network over a first cell group;

determine, in response to detecting the radio link failure condition, whether an air interface resource allocation is available for a signaling radio bearer (SRB) between the UE and the network over another cell group; and

select, based at least in part on the determination, one of a plurality of radio link failure procedures.

13. The apparatus of claim 12 , wherein the instructions are further executable by the processor to cause the apparatus to:

identify a type of the first cell group as one of: a controlling cell group (CCG) or a non-controlling cell group (NCCG); and

wherein selecting one of the plurality of radio link failure procedures is further based on the type of the first cell group.

14. The apparatus of claim 12 , wherein the instructions to select one of the plurality of radio link failure procedures further are executable by the processor to cause the apparatus to:

select a first radio link failure procedure in response to determining that the air interface resource allocation for the SRB between the UE and the network over another cell group is not available; and

perform the first radio link failure procedure, wherein the first radio link failure procedure comprises a full release of radio resources between the UE and the network.

15. The apparatus of claim 14 , wherein the instructions to perform the first radio link failure procedure further are executable by the processor to cause the apparatus to:

suspend all radio bearers of the UE; and

reset media access control (MAC) settings of the UE.

16. The apparatus of claim 14 , wherein the instructions to perform the first radio link failure procedure further comprises one or more of: are executable by the processor to cause the apparatus to:

release all secondary cells (SCells) associated with the first cell group; or

release all other cell groups associated with the connection.

17. The apparatus of claim 12 , wherein the instructions to select one of the plurality of radio link failure procedures are executable by the processor to cause the apparatus to:

select a second radio link failure procedure in response to determining that the air interface resource allocation for the SRB between the UE and the network is available over a second cell group; and

perform the second radio link failure procedure, wherein the second radio link failure procedure comprises a partial release of radio resources between the UE and the network.

18. The apparatus of claim 17 , wherein the instructions to perform the second radio link failure procedure further are executable by the processor to cause the apparatus to:

transmit an indication of the radio link failure condition to the second cell group using the SRB.

19. The apparatus of claim 17 , wherein the SRB comprises one of a split SRB associated with the first cell group and the second cell group or an SRB configured on the second cell group.

20. The apparatus of claim 17 , wherein the instructions to perform the second radio link failure procedure further are executable by the processor to cause the apparatus to:

suspend all data radio bearers (DRBs) associated with the first cell group;

suspend transmissions on resources of the first cell group; and

reset a media access control (MAC) entity corresponding to the first cell group.

21. The apparatus of claim 12 , wherein the connection is associated with signaling radio bearers comprising one or more of a direct SRB, a split SRB, a direct data radio bearer (DRB), and a split DRB.

22. The apparatus of claim 12 , wherein the instructions to determine whether the air interface resource allocation is available further are executable by the processor to cause the apparatus to:

determine that the air interface resource allocation is not available when an SRB is not configured for a radio link control (RLC) or a media access control (MAC) on the another cell group; or

determine that the air interface resource allocation is not available when a resource allocation for the SRB is not activated on the another cell group.

23. An apparatus for wireless communications at a user equipment (UE), comprising: means for detecting a radio link failure condition for a connection between the UE and a network over a first cell group; means for determining, in response to detecting the radio link failure condition, whether an air interface resource allocation is available for a signaling radio bearer (SRB) between the UE and the network over another cell group; and means for selecting, based at least in part on the determination, one of a plurality of radio link failure procedures.

24. The apparatus of claim 23 , further comprising:

means for identifying a type of the first cell group as one of: a controlling cell group (CCG) or a non-controlling cell group (NCCG); and

means for selecting one of the plurality of radio link failure procedures is further based on the type of the first cell group.

25. The apparatus of claim 23 , wherein the means for selecting one of the plurality of radio link failure procedures further comprises:

means for selecting a first radio link failure procedure in response to determining that the air interface resource allocation for the SRB between the UE and the network over another cell group is not available; and

means for performing the first radio link failure procedure, wherein the first radio link failure procedure comprises a full release of radio resources between the UE and the network.

26. The apparatus of claim 25 , wherein the means for performing the first radio link failure procedure further comprises:

means for suspending all radio bearers of the UE; and

means for resetting media access control (MAC) settings of the UE.

27. The apparatus of claim 25 , wherein the means for performing the first radio link failure procedure further comprises one or more of: comprises:

means for releasing all secondary cells (SCells) associated with the first cell group; or

means for releasing all other cell groups associated with the connection.

28. The apparatus of claim 23 , wherein the means for selecting one of the plurality of radio link failure procedures comprises:

means for selecting a second radio link failure procedure in response to determining that the air interface resource allocation for the SRB between the UE and the network is available over a second cell group; and

means for performing the second radio link failure procedure, wherein the second radio link failure procedure comprises a partial release of radio resources between the UE and the network.

29. The apparatus of claim 28 , wherein the means for performing the second radio link failure procedure further comprises:

means for transmitting an indication of the radio link failure condition to the second cell group using the SRB.

30. The apparatus of claim 28 , wherein the SRB comprises one of a split SRB associated with the first cell group and the second cell group or an SRB configured on the second cell group.

31. The apparatus of claim 28 , wherein the means for performing the second radio link failure procedure further comprises:

means for suspending all data radio bearers (DRBs) associated with the first cell group;

means for suspending transmissions on resources of the first cell group; and

means for resetting a media access control (MAC) entity corresponding to the first cell group.

32. The apparatus of claim 23 , wherein the connection is associated with signaling radio bearers comprising one or more of a direct SRB, a split SRB, a direct data radio bearer (DRB), and a split DRB.

33. The apparatus of claim 23 , wherein the means for determining whether the air interface resource allocation is available further comprises:

means for determining that the air interface resource allocation is not available when an SRB is not configured for a radio link control (RLC) or a media access control (MAC) on the another cell group; or

means for determining that the air interface resource allocation is not available when a resource allocation for the SRB is not activated on the another cell group.

34. A non-transitory computer-readable medium storing code for wireless communications at a user equipment (UE), the code comprising instructions executable by a processor to:

detect a radio link failure condition for a connection between the UE and a network over a first cell group;

determine, in response to detecting the radio link failure condition, whether an air interface resource allocation is available for a signaling radio bearer (SRB) between the UE and the network over another cell group; and

select, based at least in part on the determination, one of a plurality of radio link failure procedures.

35. The non-transitory computer-readable medium of claim 34 , wherein the instructions are further executable to:

identify a type of the first cell group as one of: a controlling cell group (CCG) or a non-controlling cell group (NCCG); and

wherein selecting one of the plurality of radio link failure procedures is further based on the type of the first cell group.

36. The non-transitory computer-readable medium of claim 34 , wherein the instructions to select one of the plurality of radio link failure procedures are further executable to:

select a first radio link failure procedure in response to determining that the air interface resource allocation for the SRB between the UE and the network over another cell group is not available; and

perform the first radio link failure procedure, wherein the first radio link failure procedure comprises a full release of radio resources between the UE and the network.

37. The non-transitory computer-readable medium of claim 36 , wherein the instructions to perform the first radio link failure procedure are further executable to:

suspend all radio bearers of the UE; and

reset media access control (MAC) settings of the UE.

38. The non-transitory computer-readable medium of claim 36 , wherein the instructions to perform the first radio link failure procedure are further executable to:

release all secondary cells (SCells) associated with the first cell group; or

release all other cell groups associated with the connection.

39. The non-transitory computer-readable medium of claim 34 , wherein the instructions to select one of the plurality of radio link failure procedures are further executable to:

select a second radio link failure procedure in response to determining that the air interface resource allocation for the SRB between the UE and the network is available over a second cell group; and

perform the second radio link failure procedure, wherein the second radio link failure procedure comprises a partial release of radio resources between the UE and the network.

40. The non-transitory computer-readable medium of claim 39 , wherein the instructions to perform the second radio link failure procedure are further executable to:

transmit an indication of the radio link failure condition to the second cell group using the SRB.

41. The non-transitory computer-readable medium of claim 39 , wherein the SRB comprises one of a split SRB associated with the first cell group and the second cell group or an SRB configured on the second cell group.

42. The non-transitory computer-readable medium of claim 39 , wherein the instructions to perform the second radio link failure procedure are further executable to:

suspend all data radio bearers (DRBs) associated with the first cell group;

suspend transmissions on resources of the first cell group; and

reset a media access control (MAC) entity corresponding to the first cell group.

43. The non-transitory computer-readable medium of claim 34 , wherein the connection is associated with signaling radio bearers comprising one or more of a direct SRB, a split SRB, a direct data radio bearer (DRB), and a split DRB.

44. The non-transitory computer-readable medium of claim 34 , wherein the instructions to determine whether the air interface resource allocation is available are further executable to:

determine that the air interface resource allocation is not available when an SRB is not configured for a radio link control (RLC) or a media access control (MAC) on the another cell group; or

determine that the air interface resource allocation is not available when a resource allocation for the SRB is not activated on the another cell group.