Communication control device and communication control method
A communication control device according to one embodiment of the present disclosure includes: a setting unit that sets a plurality of protection points in the protective space that protects a first radio system from a second radio system that performs shared use of the radio wave used by the first radio system; a determination unit that determines the target protection point to be the calculation target of the interference power received from the second radio system based on the plurality of protection points set by the setting unit; an interference power calculation unit that calculates the representative value of the interference power based on the interference power calculated for the target protection point determined by the determination unit; and an allowable power calculation unit that calculates the allowable power indicating the allowable interference power at the target protection point based on the representative value of the interference power calculated by the interference power calculation unit.
1. A communication control device, comprising:
a setting unit configured to set a plurality of protection points in a protective space that protects a first radio system from a second radio system that performs shared use of a radio wave used by the first radio system;
a determination unit configured to determine a target protection point to be a calculation target of interference power received from the second radio system based on the plurality of protection points set by the setting unit;
an interference power calculation unit configured to calculate a representative value of the interference power based on the interference power calculated for the target protection point determined by the determination unit; and
an allowable power calculation unit configured to calculate allowable power indicating allowable interference power at the target protection point based on the representative value of the interference power calculated by the interference power calculation unit.
2. The communication control device according to claim 1 , wherein
the setting unit is further configured to arrange the plurality of protection points individually in an altitude direction and a horizontal direction, and
the determination unit is further configured to determine the protection point selected from among the plurality of protection points based on a selection condition, as the target protection point.
3. The communication control device according to claim 2 , wherein the determination unit is further configured to select the protection point to be the target protection point from among the protection points arranged in the altitude direction at each position in the horizontal direction.
4. The communication control device according to claim 3 , wherein the determination unit is further configured to:
group the protection points arranged in the altitude direction for each number at each position in the horizontal direction, and
select the protection point to be the target protection point for each group.
5. The communication control device according to claim 2 , wherein the determination unit is further configured to determine the target protection point such that an interval in the altitude direction becomes longer with an increase in an altitude.
6. The communication control device according to claim 5 , wherein the determination unit is further configured to determine the target protection point such that an interval in the horizontal direction becomes longer with an increase in the altitude and an increase in a distance in the horizontal direction.
7. The communication control device according to claim 2 , wherein the determination unit is further configured to determine the protection point selected at a number of intervals as the target protection point such that none of the protection points exists to be adjacent to each other at a shortest distance in each of the altitude direction and the horizontal direction.
8. The communication control device according to claim 2 , wherein the determination unit is further configured to determine the protection points having a number corresponding to accuracy required for protection of the first radio system, as target protection points.
9. The communication control device according to claim 2 , wherein the determination unit is further configured to determine the protection point selected based on an existence probability of the first radio system in the protective space, as the target protection point.
10. The communication control device according to claim 9 , wherein the determination unit is further configured to calculate the existence probability based on at least one piece of information out of: a building height around the protective space; flight altitude of the first radio system; and a past moving route of the first radio system.
11. The communication control device according to claim 1 , wherein the determination unit is further configured to:
generate a representative protection point for each of a predetermined number of the protection points based on the plurality of protection points set by the setting unit; and
determine the generated representative protection point as the target protection point.
12. The communication control device according to claim 1 , wherein the setting unit is further configured to set the plurality of protection points at intervals according to an altitude.
13. The communication control device according to claim 1 , wherein the setting unit is further configured to set the plurality of protection points at intervals according to a surrounding environment of the protective space.
14. The communication control device according to claim 1 , wherein the setting unit is further configured to set the protection point based on a range of a distance in an altitude direction in the protective space.
15. The communication control device according to claim 14 , wherein the setting unit is further configured to:
divide the distance in the altitude direction in the protective space into a plurality of ranges at specific intervals; and
set the protection point for each of the divided ranges.
16. The communication control device according to claim 1 , further comprising
a selection unit configured to select, among a plurality of calculation methods to calculate the interference power, a calculation method based on at least one of a distance from the target protection point to the second radio system and a propagation path, wherein the interference power calculation unit is further configured to calculate the interference power by using the calculation method selected by the selection unit.
17. The communication control device according to claim 16 , wherein the selection unit is further configured to select the calculation method for each of target protection points.
18. The communication control device according to claim 16 , wherein the selection unit is further configured to select the calculation method selected at the protection point being a specific point, as the calculation method at another one of the target protection point.
19. The communication control device according to claim 1 , wherein the setting unit is further configured to:
estimate a moving range of the first radio system based on information acquired from a communication counterpart in the first radio system, and
set the protective space based on the estimated moving range.
20. A communication control method, comprising:
setting a plurality of protection points in a protective space that protects a first radio system from a second radio system that performs shared use of a radio wave used by the first radio system;
determining a target protection point to be a calculation target of interference power received from the second radio system based on the plurality of protection points that have been set;
calculating a representative value of the interference power based on the interference power calculated for the target protection point that has been determined; and
calculating allowable power indicating allowable interference power at the target protection point based on the representative value of the interference power that has been calculated.