Cell configuration parameters

1. A method comprising:

receiving, by a wireless device from a first base station, at least one radio resource control, RRC, message comprising:

master cell group, MCG, configuration parameters of a primary cell, PCell, of the first base station;

secondary cell group, SCG, configuration parameters of a primary SCG cell, PSCell, of a second base station, for dual connectivity of the wireless device with the first base station and the second base station;

determining a failure of the PCell before the PSCell configuration is applied;

based on the failure of the PCell, performing a cell selection;

in response to the selected cell being the PSCell, synchronizing with the PSCell based on the SCG configuration parameters.

2. The method of claim 1 , wherein the performing the cell selection comprises selecting the selected cell based on a received signal power value of the selected cell.

3. The method of claim 1 , wherein the synchronizing comprises performing a random access procedure with the PSCell based on the SCG configuration parameters.

4. The method of claim 1 , wherein the synchronizing does not comprise performing a random access procedure with the PSCell.

5. The method of claim 4 , wherein the SCG configuration parameters comprises an indication to skip the random access procedure.

6. The method of claim 1 , wherein the at least one RRC message comprises at least one execution condition for initiating the dual connectivity.

7. The method of claim 6 , wherein:

the at least one execution condition is not met when the failure is determined;

the synchronizing is based on the at least one execution condition for initiating the dual connectivity being met; and

the PSCell configuration is not applied based on the at least one execution not being met.

8. The method of claim 1 , further comprising transmitting, by the wireless device via the PSCell, a failure information message indicating the failure of the PCell.

9. The method of claim 1 , wherein the failure of the PCell comprises at least one of:

a radio link failure;

a reconfiguration with sync failure;

a mobility failure from new radio;

an integrity check failure indication from a lower layer concerning signaling radio bearer 1, SRB1, or signaling radio bearer 2, SRB2; and

an RRC connection reconfiguration failure.

10. The method of claim 1 , wherein the determining the failure of the PCell before the PSCell configuration is applied comprises:

determining the failure of the PCell before the PSCell configuration is applied for change or addition of the PSCell.

11. A wireless device comprising:

one or more processors; and

memory storing instructions that, when executed by the one or more processors, cause the wireless device to:

receive, from a first base station, at least one radio resource control, RRC, message comprising:

master cell group, MCG, configuration parameters of a primary cell, PCell, of the first base station;

secondary cell group, SCG, configuration parameters of a primary SCG cell, PSCell, of a second base station, for dual connectivity of the wireless device with the first base station and the second base station;

determine a failure of the PCell before the PSCell configuration is applied;

based on the failure of the PCell, perform a cell selection;

in response to the selected cell being the PSCell, synchronize with the PSCell based on the SCG configuration parameters.

12. The wireless device of claim 11 , wherein the performing the cell selection comprises selecting the selected cell based on a received signal power value of the selected cell.

13. The wireless device of claim 11 , wherein the synchronizing comprises performing a random access procedure with the PSCell based on the SCG configuration parameters.

14. The wireless device of claim 11 , wherein the synchronizing does not comprise performing a random access procedure with the PSCell.

15. The wireless device of claim 14 , wherein the SCG configuration parameters comprises an indication to skip the random access procedure.

16. The wireless device of claim 11 , wherein the at least one RRC message comprises at least one execution condition for initiating the dual connectivity.

17. The wireless device of claim 16 , wherein:

the at least one execution condition is not met when the failure is determined;

the synchronizing is based on the at least one execution condition for initiating the dual connectivity being met; and

the PSCell configuration is not applied based on the at least one execution not being met.

18. The wireless device of claim 11 , wherein the instructions further cause the wireless device to transmit, via the PSCell, a failure information message indicating the failure of the PCell.

19. The wireless device of claim 11 , wherein the determining the failure of the PCell before the PSCell configuration is applied comprises:

determining the failure of the PCell before the PSCell configuration is applied for change or addition of the PSCell.

20. A system, comprising:

a first base station comprising: one or more processors and memory storing instructions that, when executed by the one or more processors, cause the first base station to:

transmit, to a wireless device, at least one radio resource control, RRC, message comprising:

master cell group, MCG, configuration parameters of a primary cell, PCell, of the first base station;

secondary cell group, SCG, configuration parameters of a primary SCG cell, PSCell, of a second base station, for dual connectivity of the wireless device with the first base station and the second base station; and

a wireless device comprising: one or more processors and memory storing instructions that, when executed by the one or more processors, cause the wireless device to:

receive the at least one RRC message comprising the MCG configuration parameters and the SCG configuration parameters;

determine a failure of the PCell before the PSCell configuration is applied;

based on the failure of the PCell, perform a cell selection; and

in response to the selected cell being the PSCell, synchronize with the PSCell based on the SCG configuration parameters.