Technique for operating a movable radio base station

1. A method of operating a movable radio base station, the movable radio base station configured to provide to a plurality of user equipments wireless access to a telecommunications network in a first mode and in a second mode different from the first mode, wherein each of the first mode and the second mode specifies a set of parameter values for operating parameters of the movable radio base station, the method comprising:

exchanging the parameter values with another movable radio base station, wherein the operating parameters of the movable radio base station include an altitude of the movable radio base station; and

changing the movable radio base station from the first mode to the second mode, wherein changing the movable radio base station from the first mode to the second mode comprises decreasing the altitude of the movable radio base station and triggering one or more neighboring movable radio base stations to increase their altitude.

2. The method of claim 1 , wherein the second mode specifies the operating parameters upon entering the second mode by setting the operating parameters to parameter values predefined for the second mode.

3. The method of claim 1 , further comprising at least one of:

performing, at the movable radio base station, a measurement resulting in a measurement result; and

receiving, at the movable radio base station, a measurement result of a measurement.

4. The method of claim 3 , wherein the measurement is related to the wireless access.

5. The method of claim 3 , wherein the measurement result is indicative of at least one of:

radio interference between the movable radio base station and one or more neighboring movable radio base stations; and

handovers of the user equipments that involve the movable radio base station as handover source cell.

6. The method of claim 1 , wherein at least one of the parameter values is changed while the movable radio base station is in the second mode.

7. The method of 1 : further comprising at least one of:

performing, at the movable radio base station, a measurement resulting in a measurement result; or

receiving, at the movable radio base station, a measurement result of a measurement;

wherein at least one of the parameter values is changed while the movable radio base station is in the second mode

wherein the at least one of the parameter values is changed in response to the measurement result.

8. The method of claim 1 , further comprising receiving from and/or signaling to one or more neighboring movable radio base stations at least one of a current mode, current parameter values, and the measurement result.

9. The method of claim 1 , wherein the changing the mode is triggered by at least one of a command signal received from a network operation center of the telecommunications network and the measurement result.

10. The method of claim 1 , wherein the changing the mode is triggered by at least one of velocity of the user equipments connected to the movable radio base station and an inhomogeneity of the user equipments connected to the movable radio base station.

11. The method of claim 1 , wherein the movable radio base station is mounted on an unmanned aerial vehicle.

12. The method of claim 1 , wherein the operating parameters of the movable radio base station include at least one of:

velocity of the movable radio base station;

maximum number of the user equipments connected to the movable radio base station;

carrier frequency of the movable radio base station;

frequency bandwidth of the movable radio base station;

transmission power of the movable radio base station;

one or more tilt angles of one or more antennas configured to provide the wireless access and mounted at the movable radio base station; and

a threshold for allowing handovers of the user equipments connected to the movable radio base station.

13. A non-transitory computer readable recording medium storing a computer program product for operating a movable radio base station, the movable radio base station configured to provide to a plurality of user equipments wireless access to a telecommunications network in a first mode and in a second mode different from the first mode, wherein each of the first mode and the second mode specifies a set of parameter values for operating parameters of the movable radio base station, the computer program product comprising software instructions which, when run on processing circuitry of a computing device, causes the computing device to:

exchange the parameter values with another movable radio base station, wherein the operating parameters of the movable radio base station include an altitude of the movable radio base station; and

change the movable radio base station from the first mode to the second mode by decreasing the altitude of the movable radio base station and triggering one or more neighboring movable radio base stations to increase their altitude.

14. A device for operating a movable radio base station, the movable radio base station configured to provide to a plurality of user equipments wireless access to a telecommunications network in a first mode and in a second mode different from the first mode, wherein each of the first mode and the second mode specifies a set of parameter values for operating parameters of the movable radio base station, the device comprising:

processing circuitry;

memory containing instructions executable by the processing circuitry whereby the device is operative to: exchange with another movable radio base station the parameter values, wherein the operating parameters of the movable radio base station include an altitude of the movable radio base station; and

change the movable radio base station from the first mode to the second mode by decreasing the altitude of the movable radio base station and triggering one or more neighboring movable radio base stations to increase their altitude.

15. A movable radio base station configured to provide to a plurality of user equipments wireless access to a telecommunications network in a first mode and in a second mode different from the first mode, wherein each of the first mode and the second mode specifies a set of parameter values for operating parameters of the movable radio base station, the movable radio base station comprising:

processing circuitry;

memory containing instructions executable by the processing circuitry whereby the movable radio base station is operative to: exchange with another movable radio base station the parameter values, wherein the operating parameters of the movable radio base station include an altitude of the movable radio base station; and

change the movable radio base station from the first mode to the second mode by decreasing the altitude of the movable radio base station and triggering one or more neighboring movable radio base stations to increase their altitude.