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1. (WO2019063597) STATION DE BASE, ET ÉQUIPEMENT D'UTILISATEUR
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CLAIMS

1. A user equipment for a mobile telecommunications system comprising circuitry including a receiver and a transmitter and being configured to communicate with a new radio base station and a LTE base station, wherein the circuitry is further configured to:

indicate a coexistence indication to the new radio base station or to the LTE base station; and

receive a power control instruction for controlling power output of the transmitter.

2. The user equipment of claim 1 , wherein the coexistence indication is indicated when a prede fined combination of a new radio transmission band and a LTE transmission band is detected.

3. The user equipment of claim 2, wherein the coexistence indication is indicated when additionally a downlink performance degradation is detected.

4. The user equipment of claim 2, wherein the coexistence indication is indicated when it is detected that the receiver or transmitter tunes to the predefined combination of the new radio transmission band and the LTE transmission band.

5. The user equipment of claim 4, wherein the coexistence indication is indicated, based on per formance information associated with the combination of the new radio transmission band and the LTE transmission band.

6. The user equipment of claim 1, wherein the coexistence indication is indicated, based on a predetermined threshold of an operation parameter of the receiver.

7. The user equipment of claim 1 , wherein the coexistence indication is indicated, based on detection of a predefined MIMO layer configuration.

8. The user equipment of claim 1, wherein the coexistence indication is indicated included in a power headroom message.

9. The user equipment of claim 8, wherein the power headroom message only contains power headroom information of serving cells associated with a predefined combination of a new radio transmission band and a LTE transmission band.

10. The user equipment of claim 1, wherein the coexistence indication is indicated included in a user equipment capability signaling.

11. The user equipment of claim 1 , wherein the coexistence indication is explicitly indicated by transmitting it to the new radio base station or to the LTE base station.

12. The user equipment of claim 1, wherein the coexistence indication is implicitly indicated by skipping an allocated uplink grant.

13. The user equipment of claim 12, wherein the allocated uplink grant is on a predefined band included in a predefined combination of a new radio transmission band and a LTE transmission band.

14. The user equipment of claim 1, wherein the coexistence indication is indicated, based on transmission of a measurement report.

15. The user equipment of claim 14, wherein the measurement report is a channel state information measurement report or a downlink coverage measurement report.

16. The user equipment of claim 14, wherein the measurement report is transmitted, based on a predefined event.

17. The user equipment of claim 16, wherein the predefined event includes at least one of the following information: two uplinks without power restriction for intermodulation are allowed, two uplinks with power control for intermodulation are allowed, only single uplink is allowed.

18. The user equipment of claim 1, wherein the coexistence indication includes an indication of at least one subframe for simultaneous new radio and LTE uplink transmission.

19. A base station for a mobile telecommunications system comprising circuitry configured to communicate with at least one user equipment, the at least one user equipment being configured to communicate with a new radio base station and a LTE base station, wherein the circuitry is further configured to:

detect a coexistence indication; and

transmit a power control instruction to the at least one user equipment, based on the detected coexistence indication.

20. The base station of claim 19, wherein the coexistence indication is detected in a received power headroom message.

21. The base station of claim 19, wherein the power headroom message only contains power headroom information of serving cells associated with a predefined combination of a new radio transmission band and a LTE transmission band.

22. The base station of claim 19, wherein the coexistence indication is detected in a received user equipment capability signaling.

23. The base station of claim 19, wherein the coexistence indication is received from the at least one user equipment.

24. The base station of claim 19, wherein the coexistence indication is detected by detecting that the at least one user equipment skipped an allocated uplink grant.

25. The base station of claim 24, wherein the allocated uplink grant is on a predefined band included in a predefined combination of a new radio transmission band and a LTE transmission band.

26. The base station of claim 19, wherein the coexistence indication is detected, based on a measurement report received from the at least one user equipment.

27. The base station of claim 26, wherein the measurement report is a channel state information measurement report or a downlink coverage measurement report.

28. The base station of claim 26, wherein the measurement report is received, based on a predefined event.

29. The base station of claim 28, wherein the predefined event includes two uplinks without power restriction for intermodulation are allowed information.

30. The base station of claim 29, wherein the two uplinks without power restriction for intermodulation are allowed information includes a signal strength measurement information or a channel quality indicator information.

31. The base station of claim 30, wherein the power control instruction includes information to activate an LTE uplink and a new radio uplink when the signal strength or the quality indicator is above a predefined threshold.

32. The base station of claim 28, wherein the predefined event includes two uplinks with power control for intermodulation are allowed information.

33. The base station of claim 32, wherein the power control instruction includes power control information to control output pow8r of the transmitter of the at least one user equipment.

34. The base station of claim 27, wherein the predefined event includes only single uplink is allowed information.

35. The base station of claim 34, wherein the power control instruction includes information to activate only one uplink channel.

36. The base station of claim 19, wherein the coexistence indication includes an indication of at least one subframe for simultaneous new radio and LTE uplink transmission.