Communication device, base station apparatus, method, and program

1. A communication device having positional information including an altitude and comprising a processor configured to cause the communication device to:

receive system information including a set of identities indicating virtual cells associated with one or more base stations; and

select, based on the positional information including the altitude of the communication device, a virtual cell identity from the set through which to communicate with a first base station, from among the one or more base stations, associated with the selected virtual cell identity.

2. The communication device according to claim 1 , wherein the processor is further configured to select the virtual cell identity on a basis of reference signal received power (RSRP) measured from cell-specific reference signal (CRS).

3. The communication device according to claim 1 , wherein the processor is further configured to select the virtual cell identity on a basis of a moving speed of the communication device.

4. The communication device according to claim 1 , wherein the virtual cell identity is associated with setting of channel state information reference signal (CSI-RS), the CSI-RS being used for radio resource management (RRM) measurement.

5. The communication device according to claim 1 , wherein the virtual cell identity is used to scramble a physical channel.

6. The communication device according to claim 1 , wherein the virtual cell identity is used to generate a sequence of a reference signal.

7. The communication device according to claim 1 , wherein the virtual cell identity is used to set random access procedure (RACH).

8. The communication device according to claim 1 , wherein the communication device is a communication device floating in air.

9. The communication device according to claim 1 , wherein the processor is further configured to: receive system information including a set of identities indicating physical cells associated with one or more base stations; and

select, based on a comparison of information of the communication device to a threshold, a physical cell identity from the set.

10. The communication device according to claim 9 , wherein the information of the communication device is a speed of the communication device, and wherein the processor is further configured to select a physical cell identity from the set when the speed of the communication device is below the threshold and to select a virtual cell identity from the set when the speed of the communication device is above the threshold.

11. The communication device according to claim 9 , wherein the processor is further configured to select a physical cell identity from the set when the altitude of the communication device is below the threshold and to select a virtual cell identity from the set when the altitude of the communication device is above the threshold.

12. A base station apparatus comprising a processor configured to cause the base station apparatus to:

set a plurality of identities indicating virtual cells, wherein the setting includes setting virtual cell identities according to positional information of communication devices, the positional information including an altitude such that a first virtual cell identity at a first altitude is different from a second virtual cell identity at a second altitude different from the first altitude; and

transmit system information including a set of the virtual cell identities to one or more communication devices.

13. A method performed by a processor, comprising:

receiving system information including a set of identities indicating virtual cells associated with one or more base stations; and

selecting, based on positional information including an altitude of a communication device, a virtual cell identity from the set through which to communicate with a first base station, from among the one or more base stations, associated with the selected virtual cell identity.

14. A non-transitory, computer-readable medium storing instructions that, when executed by a processor in the computer, control the computer to implement a method comprising:

receiving system information including a set of identities indicating virtual cells associated with one or more base stations; and

selecting, based on positional information including an altitude of a communication device, a virtual cell identity from the set through which to communicate with a first base station, from among the one or more base stations, associated with the selected virtual cell identity.