Equipment and mobile telecommunications system

1. A base station configured to communicate with at least one user equipment for an unmanned aerial vehicle, the base station comprising:

circuitry configured to

detect a change in an altitude of the unmanned aerial vehicle corresponding to the unmanned aerial vehicle landing, based on an indication received from the user equipment, and

set a first timer for releasing an RRC connection of the unmanned aerial vehicle after the unmanned aerial vehicle lands, the first timer for the unmanned aerial vehicle having a larger value than a value of a second timer set for a terrestrial user equipment.

2. The base station of claim 1 , wherein the indication transmitted from the user equipment is based on a measurement result report and wherein the base station is further configured to detect the change based on the measurement result report.

3. The base station of claim 1 , wherein a flight path of the user equipment for an unmanned aerial vehicle is known and wherein the base station at the end of the flight path is further configured to provide a measurement configuration for handover to another base station.

4. The base station of claim 3 , wherein the base station at the end of the flight path is further configured to inform the other base station, during a handover procedure, that the user equipment for an unmanned aerial vehicle switches from flying to a terrestrial mode.

5. The base station of claim 1 , wherein base station is further configured to configure a measurement configuration based on the indication.

6. The base station of claim 1 , wherein the indication is an explicit indication.

7. The base station of claim 6 , wherein the indication is based on an explicit location information, a flight path information or an explicit altitude information.

8. The base station of claim 1 , wherein the indication is transmitted in a signaling.

9. The base station of claim 8 , wherein the signaling is a radio resource control signaling, a packet data convergence protocol signaling, a radio link control signaling, medium access control signaling or a LI signaling.

10. The base station of claim 1 , wherein the indication is an implicit indication.

11. The base station of claim 10 , wherein the indication is based on mobility state information.

12. The base station of claim 11 , wherein the mobility state information includes terrestrial user equipment mobility state parameters.

13. The base station of claim 10 , wherein the indication is based on a measurement report.

14. The base station of claim 13 , wherein the measurement report indicates that it is transmitted from a user equipment being in a terrestrial mode.

15. The base station of claim 10 , wherein the indication is based on indicating a change from directional antenna to omni-directional antenna.

16. The base station of claim 10 , wherein the indication is based on indicating a deactivation of coordinated multipoint.

17. The base station of claim 10 , wherein the indication is based on indicating a change from enhanced coverage level to normal coverage level.

18. The base station of claim 10 , wherein the indication is based on indicating stopping using user equipment fractional path loss compensation factor defined for airborne unmanned aerial vehicles.

19. A method of operating a base station to communicate with at least one user equipment for an unmanned aerial vehicle, the method comprising:

detecting a change in an altitude of the unmanned aerial vehicle corresponding to the unmanned aerial vehicle landing, based on an indication received from the user equipment; and

setting a first timer for releasing an RRC connection of the unmanned aerial vehicle after the unmanned aerial vehicle lands, the first timer for the unmanned aerial vehicle having a larger value than a value of a second timer set for a terrestrial user equipment.