Recovery/fallback after unsuccessful 2-step random access attempt

1. A wireless device configured to communicate with a network node, the wireless device comprising:

processing circuitry configured to:

trigger a random access (RA) process;

select a first beam for the RA process, the selected first beam being associated with a two-step RA configuration, a characteristic of the selected first beam being determined to meet a predefined threshold;

perform a two-step RA process associated with the two-step RA configuration using the selected first beam;

determine that a step of the two-step RA process has failed; and

in response to determining the step of the two-step RA process has failed, retransmit an uplink shared channel portion of a message A, msgA, of the two-step RA process as an uplink shared channel message in a four step RA process.

2. The wireless device of claim 1 , wherein the processing circuitry is further configured to:

receive system information; and

determine whether the selected first beam is associated with the two-step RA configuration based at least on the system information, the two-step RA configuration corresponding to a mapping of the selected first beam to a physical uplink shared channel, PUSCH, configuration.

3. The wireless device of claim 1 , wherein the selected first beam is selected from a plurality of beams, a subset of the plurality of beams being associated with the two-step RA configuration.

4. The wireless device of claim 3 , wherein the subset of the plurality of beams are one of a subset of synchronization signal blocks, SSBs, beams and a set of channel state information reference signal, CSI-RS, beams.

5. The wireless device of claim 1 , wherein the characteristic of the selected first beam is a channel quality and the predefined threshold is a channel quality threshold.

6. The wireless device of claim 3 , wherein the determination that the step of the two-step RA process has failed comprises receiving a fallback random access response, RAR.

7. The wireless device of claim 6 , wherein the determination that the step of the two-step RA process has failed based on one of:

an absence of a response to the msgA;

receiving a random access response, RAR, message that includes fallback information; and

receiving a message B, msgB, containing first information indicating that the step of the two-step RA process has failed.

8. The wireless device of claim 6 , wherein the retransmission is performed based on reselection of a beam from the plurality of beams, the reselection includes using contention-free RA resources configured for one of channel state information reference signal, CSI-RS, and synchronization signal block, SSB.

9. A method implemented by a wireless device that is configured to communicate with a network node, the method comprising:

triggering a random access (RA) process;

selecting a first beam for the RA process, the selected first beam being associated with a two-step RA configuration, a characteristic of the selected first beam being determined to meet a predefined threshold;

performing a two-step RA process associated with the two-step RA configuration using the selected first beam;

determining that a step of the two-step RA process has failed; and

in response to determining the step of the two-step RA process has failed, retransmitting an uplink shared channel portion of a message A, msgA, of the two-step RA process as an uplink shared channel message in a four step RA process.

10. The method of claim 9 , further comprising:

receiving system information; and

determining whether the selected first beam is associated with the two-step RA configuration based at least on the system information, the two-step RA configuration corresponding to a mapping of the selected first beam to a physical uplink shared channel, PUSCH, configuration.

11. The method of claim 9 , wherein the selected first beam is selected from a plurality of beams, a subset of the plurality of beams being associated with the two-step RA configuration.

12. The method of claim 11 , wherein the subset of the plurality of beams are one of a subset of synchronization signal blocks, SSBs, beams and a set of channel state information reference signal, CSI-RS, beams.

13. The method of claim 12 , wherein the subset of SSBs beams are associated with contention free RA resources for contention free RA.

14. The method of claim 12 , wherein at least one other beam of the plurality of beams is not associated with the two-step RA configuration.

15. The method of claim 11 , wherein the retransmission is performed based on reselection of a beam from the plurality of beams, the reselection includes using contention-free RA resources configured for one of channel state information reference signal, CSI-RS, and synchronization signal block, SSB.

16. A network node configured to communicate with a wireless device, the network node comprising:

processing circuitry configured to:

associate a plurality of beams with a plurality of random access, RA, configurations, a first beam of the plurality of beams being associated with a two-step RA configuration;

perform a two-step RA process using the first beam based on the two-step RA configuration associated with the first beam;

determine that a step of the two-step RA process has failed; and

in response to the failed step of the two-step RA process, receive a retransmission of uplink shared channel portion of a message A, msgA, of the two-step RA process as an uplink shared channel message in a four step RA process.

17. The network node of claim 16 , wherein one of:

the processing circuitry is further configured to transmit system information, the system information indicating the plurality of RA configurations; and

a subset of the plurality of beams are associated with the two-step RA configuration.

18. The network node of claim 16 , wherein one of:

the subset of the plurality of beams are one of a subset of synchronization signal blocks, SSBs, beams and a set of channel state information reference signal, CSI-RS, beams; and

the subset of SSBs beams are associated with contention free RA resources for contention free RA.

19. The network node of claim 16 , wherein the processing circuitry is further configured to,

in response to the determination that the step of the two-step RA process has failed, transmit a fallback random access response, RAR.

20. The network node of claim 16 , wherein the processing circuitry is further configured to

in response to the determination that the step of the two-step RA process has failed, one of:

transmit a random access response, RAR, message that includes fallback information; and

transmit a message B, msgB, containing first information indicating that the step of the two-step RA process has failed.

21. A method implemented by a network node that is configured to communicate with a wireless device, the method comprising:

associating a plurality of beams with a plurality of random access, RA, configurations, a first beam of the plurality of beams being associated with a two-step RA configuration;

performing a two-step RA process using the first beam based on the two-step RA configuration associated with the first beam;

determining a step of the two-step RA process has failed; and

in response to the failed step of the two-step RA process, receiving a retransmission of uplink shared channel portion of a message A, msgA, of the two-step RA process as an uplink shared channel message in a four step RA process.

22. The method of claim 21 , further comprising transmitting system information, the system information indicating the plurality of RA configurations.

23. The method of claim 21 , wherein a subset of the plurality of beams are associated with the two-step RA configuration; and wherein the subset of the plurality of beams are one of a subset of synchronization signal blocks, SSBs, beams and a set of channel state information reference signal, CSI-RS, beams.

24. The method of claim 21 , further comprising:

in response to the determination that the step of the two-step RA process has failed, transmitting a fallback random access response, RAR.

25. The method of claim 21 , further comprising:

in response to the determination that the step of the two-step RA process has failed, one of:

transmitting a random access response, RAR, message that includes fallback information; and

transmitting a message B, msgB, containing first information indicating that the step of the two-step RA process has failed.