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1. WO2021066697 - PROCÉDÉS, ÉQUIPEMENT UTILISATEUR ET NOEUD DE RÉSEAU POUR GÉRER DES CONFIGURATIONS DE PRACH

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CLAIMS

1. A method (500) performed by a User Equipment, UE, (103) in a communications system (100), the method (500) comprising:

obtaining ( 510) a Physical Random Access Channel, PRACH, configuration, wherein the PRACH configuration indicates that the PRACH comprises at least one offset; and

applying (520) the PRACH configuration.

2. The method (500) according to claim 1 , wherein the at least one offset is located between two consecutive Random Access Channel, RACH, Occasions, ROs, in frequency domain.

3. The method (500) according to claim the 2, wherein the ROs in the frequency domain are distributed across different Listen-Before-Talk, LBT, bandwidth segments in the PRACH configuration.

4. The method (500) according to any of claims 2 and 3, wherein the at least one offset is an msg1-ROFrequencyOffset defined for a RACH-ConfigGeneric.

5. The method (500) according to any of claims 1 to 4, wherein the at least one offset takes a value in a range between 0 and a maximum number of Physical Resource Blocks, PRB, minus 1 .

6. The method (500) according to any of claims 1 to 5, wherein the at least one offset covers a bandwidth of a guard band between ROs in the PRACH configuration.

7. The method (500) according to any of claims 1 to 6, wherein the PRACH configuration comprises a location parameter, wherein the location parameter indicates a location of the at least one offset in the PRACH configuration.

8. The method (500) according to claim 7, wherein the location parameter is an msg1-FDM-per-sub band parameter.

9. The method (500) according to any of claims 7 and 8, wherein the location parameter is present when more than two ROs are configured in the frequency domain.

10. The method (500) according to any of claims 1 to 9, wherein the step of obtaining (510) the PRACH configuration comprises: determining (512) the PRACH configuration or receiving (514) the PRACH configuration from a network node (101) directly or via some other node or memory unit.

11. The method (500) according to any of claims 1 to 10, wherein the step of applying (520) the PRACH configuration comprises: initiating (522) a Random Access, RA, procedure according to the obtained PRACH configuration.

12. The method (500) according to any of claims 1 to 11 , wherein the UE is configured with multiple serving cells or carriers within a same timing advance group.

13. A method (600) performed by a network node (101) in a communications system (100), the method (600) comprising:

providing ( 620) a Physical Random Access Channel, PRACH, configuration to a User Equipment, UE, (103), wherein the PRACH configuration indicates that the PRACH comprises at least one offset.

14. The method (600) according to claim 13, wherein the method (600) further comprises:

determining (610) the PRACH configuration.

15. The method (600) according to any of claims 13 and 14, wherein the at least one offset is located between two consecutive Random Access Channel, RACH, Occasions, ROs, in frequency domain.

16. The method (600) according to claim 14, wherein the ROs in the frequency domain are distributed across different Listen-Before-Talk, LBT, bandwidth segments in the PRACH configuration.

17. The method (600) according to any of claims 15 and 16, wherein the at least one offset is an msg1-ROFrequencyOffset defined for a RACH-ConfigGeneric.

18. The method (600) according to any of claims 13 to 17, wherein the at least one offset takes a value in a range between 0 and a maximum number of Physical Resource Blocks, PRBs, minus 1.

19. The method (600) according to any of claims 13 to 18, wherein the at least one offset covers a bandwidth of a guard band between ROs in the PRACH configuration.

20. The method (600) according to any of claims 13 to 19, wherein the PRACH configuration comprises a location parameter, wherein the location parameter indicates a location of the at least one offset in the PRACH configuration.

21. The method (600) according to claim 20, wherein the location parameter is an msg1-FDM-per-sub band parameter.

22. The method (600) according to any of claims 20 and 21 , wherein the location parameter is present when more than two ROs are configured in the frequency domain.

23. The method (600) according to any of claims 13 to 22, wherein the step of providing (620) the PRACH configuration to the UE (103) comprises providing the PRACH configuration to the UE (103) directly or via some other node or memory unit.

24. The method (600) according to any of claims 13 to 23, wherein the method (600) further comprises:

receiving (630), from the UE (103), a Random Access, RA, message initiating a RA procedure, wherein the RA procedure is initiated according to the PRACH configuration.

25. An UE (103) adapted to perform a method according to any of claims 1-12.

26. A network node (101) adapted to perform a method according to any of claims 13-24.

27. A computer program comprising instructions which, when executed on at least one processor, cause the at least one processor to carry out the method according to any one of claims 1-12 and/or 13-24.

28. A carrier comprising the computer program of claims 27, wherein the carrier is one of an electronic signal, optical signal, radio signal or computer readable storage medium.