Uplink and downlink synchronization procedures

1. A method comprising:

setting, for beam failure recovery, a first active downlink bandwidth part (BWP) index, associated with a first active downlink BWP of a cell, and a first active uplink BWP index, associated with a first active uplink BWP of the cell, to a same value;

transmitting, by a base station, a radio resource control (RRC) reconfiguration message comprising:

the first active downlink BWP index; and

the first active uplink BWP index;

receiving, via the first active uplink BWP, a random access preamble for beam failure recovery; and

transmitting, via the first active downlink BWP, a random access response.

2. The method of claim 1 , wherein the setting comprises at least one of:

setting the first active downlink BWP index to be the same as the first active uplink BWP index; or

setting the first active uplink BWP index to be the same as the first active downlink BWP index.

3. The method of claim 1 , further comprising:

initiating, after the setting the first active downlink BWP index and the first active uplink BWP index to the same value, beam failure recovery.

4. The method of claim 1 , further comprising:

based on detecting a beam failure of the first active downlink BWP, initiating beam failure recovery.

5. The method of claim 1 , further comprising:

determining, based on a quantity of beam failure instance indications of the first active downlink BWP satisfying a threshold value, a beam failure.

6. The method of claim 1 , further comprising initiating beam failure recovery, wherein the initiating the beam failure recovery comprises:

selecting a reference signal associated with a random access channel resource; and

transmitting, based on the reference signal associated with the random access channel resource, the random access preamble.

7. The method of claim 6 , wherein the receiving the random access preamble is via the random access channel resource.

8. A method comprising:

receiving, by a wireless device, a radio resource control (RRC) reconfiguration message comprising:

a first active downlink bandwidth part (BWP) index of a first active downlink BWP of a cell; and

a first active uplink BWP index of a first active uplink BWP of the cell, wherein the first active uplink BWP index and the first active downlink BWP index are set to a same value;

transmitting, via the first active uplink BWP, a random access preamble for beam failure recovery; and

receiving, via the first active downlink BWP, a random access response.

9. The method of claim 8 , further comprising:

based on determining that the first active uplink BWP index and the first active downlink BWP index are set to a same value, starting monitoring one or more reference signals associated with a random access procedure for the cell.

10. The method of claim 8 , wherein the RRC reconfiguration message comprises beam failure recovery (BFR) parameters, and wherein the BFR parameters comprise at least one of:

a first reference signal;

a beam failure instance counter; or

a random access channel resource.

11. The method of claim 8 , further comprising:

determining that a radio quality of one or more first reference signals is less than a threshold value, wherein the threshold value is based on one or more of:

beam failure recovery parameters; or

a hypothetical block error rate.

12. The method of claim 8 , further comprising:

activating, prior to the receiving the random access response, the first active downlink BWP.

13. The method of claim 8 , further comprising:

monitoring a downlink control channel of the first active downlink BWP.

14. A method comprising:

setting, by a base station and for beam failure recovery, one or more reconfiguration parameters to a same value, wherein the one or more reconfiguration parameters comprise:

a first active downlink bandwidth part (BWP) index for a cell; and

a first active uplink BWP index for the cell; and

transmitting the one or more reconfiguration parameters of the cell.

15. The method of claim 14 , further comprising:

receiving, via a first active uplink BWP associated with the first active uplink BWP index, a random access preamble for beam failure recovery; and

transmitting, via a first active downlink BWP associated with the first active downlink BWP index, a random access response.

16. The method of claim 14 , wherein the setting the one or more reconfiguration parameters to the same value further comprises:

setting the first active downlink BWP index to be the same as the first active uplink BWP index; or

setting the first active uplink BWP index to be the same as the first active downlink BWP index.

17. The method of claim 14 , further comprising:

performing, after the setting the one or more reconfiguration parameters to the same value, beam failure recovery.

18. The method of claim 14 , further comprising:

based on detecting a beam failure of a first active downlink BWP associated with the first active downlink BWP index, performing beam failure recovery.

19. The method of claim 1 , wherein the setting the first active downlink BWP index and the first active uplink BWP index is based on a random access procedure for beam failure recovery.

20. The method of claim 14 , wherein the setting the one or more reconfiguration parameters is based on a random access procedure for beam failure recovery.