Communication system, control server apparatus, control method and program

1 . A communication system comprising:

a memory; and

a processor coupled to the memory and configured to work as a control server apparatus and a movable base station device,

wherein the processor is configured, as the control server apparatus, to:

select, as a movement destination position of the movable base station device,

a position at which a movement distance from a current position of the movable base station device is minimum, among positions at which a base station position evaluation index is equal to or larger than a threshold; and

perform control to move the movable base station device to the movement destination position.

2 . The communication system according to claim 1 ,

wherein the base station position evaluation index is a number of line-of-sight terminals, a number of elements in a line-of-sight area, communication quality of an area element, or communication quality of a terminal.

3 . The communication system according to claim 1 ,

wherein the processor is further configured, as the control server apparatus, to:

generate a terminal cluster in which terminal devices are clustered based on a position of each terminal device;

determine an outlier terminal device based on the position of each terminal device, a velocity of each terminal device, or an acceleration of each terminal device;

calculate a movement destination position of the movable base station device based on a position of a center of gravity of the terminal cluster after the outlier terminal device is excluded from the terminal cluster; and

perform control to move the movable base station device to the movement destination position.

4 . A non-transitory computer-readable recording medium storing a program for causing a computer to work as the communication system according to claim 1 .

5 . The communication system according to claim 1 , further comprising a storage,

wherein the storage stores space information database including information of a shielding object in an area in which the movable base station is located; and

wherein the processor is further configured, as the control server apparatus, to:

acquire the information of the shielding object from the space information database; and

select the movement destination position of the movable base station device based on the information of the shielding object.

6 . A computer-implemented method for controlling a communication system including a control server apparatus and a movable base station device,

wherein the method controls the control server apparatus to:

select, as a movement destination position of the movable base station device;

a position at which a movement distance from a current position of the movable base station device is minimum, among positions at which a base station position evaluation index is equal to or larger than a threshold; and

perform control to move the movable base station device to the movement destination position.

7 . The method according to claim 6 ,

wherein the method further controls the control server apparatus to:

generate a terminal cluster in which terminal devices are clustered based on a position of each terminal device;

determine an outlier terminal device based on the position of each terminal device, a velocity of each terminal device, or an acceleration of each terminal device;

calculate a movement destination position of the movable base station device based on a position of a center of gravity of the terminal cluster after the outlier terminal device is excluded from the terminal cluster; and

perform control to move the movable base station device to the movement destination position.