COMMUNICATION CONTROL APPARATUS, RADIO SYSTEM, AND RADIO RESOURCE ALLOCATION METHOD

1 . A communication control apparatus that manages a plurality of radio apparatuses allocated for each cluster and shared by a plurality of operators, the communication control apparatus comprising:

a controller that allocates a radio resource of each operator for each radio apparatus in each cluster in accordance with a constraint condition decided;

a calculator that calculates an alteration-induced value related to an evaluation value for each operator of each radio apparatus in each cluster under an assumption of increasing/decreasing a radio resource allocated to each operator of each radio apparatus in the cluster; and

decision processor circuitry that decides, for each cluster, a constraint condition that maximizes the alteration-induced value of each radio apparatus in all the clusters and under which a capacity of a radio resource allocated to each radio apparatus satisfies a first prescribed quantity and a calculation capacity of a radio resource allocated to each operator in an entire cluster satisfies a second prescribed quantity.

2 . A radio system comprising:

a plurality of radio apparatuses allocated for each cluster and shared by a plurality of operators;

a first communication control apparatus that is provided for each cluster and manages the plurality of radio apparatuses in an own cluster; and

a second communication control apparatus connected to the first communication control apparatus, wherein

the first communication control apparatus includes:

a controller that allocates a radio resource of each operator for each radio apparatus in the own cluster in accordance with a constraint condition decided by the second communication control apparatus;

a calculator that calculates an alteration-induced value related to an evaluation value for each operator of each radio apparatus in the own cluster under an assumption of increasing/decreasing the radio resource allocated to each operator of each radio apparatus in the own cluster; and

first notification processor circuitry that notifies the second communication control apparatus of the calculated alteration-induced value for each operator of each radio apparatus in the own cluster, and

the second communication control apparatus includes:

a receiver that receives the alteration-induced value individually from each first communication control apparatus;

decision processor circuitry that decides, for each cluster, a constraint condition that maximizes the alteration-induced value of each radio apparatus in all the clusters and under which a capacity of the radio resource allocated to each radio apparatus satisfies a first prescribed quantity and a calculation capacity of a radio resource allocated to each operator in an entire cluster satisfies a second prescribed quantity; and

second notification processor circuitry that notifies the first communication control apparatus that manages each cluster of the decided constraint condition for each cluster.

3 . The radio system according to claim 2 , wherein

the calculator

includes collection processor circuitry that collects reception quality information from a terminal apparatus that performs radio communication with the radio apparatus to the radio apparatus in the own cluster, and

calculates the alteration-induced value related to the evaluation value for each operator of each radio apparatus in the own cluster under an assumption of increasing/decreasing the radio resource of each operator of each radio apparatus in the own cluster using each piece of the collected reception quality information.

4 . The radio system according to claim 2 , wherein

the first communication control apparatus includes:

a first calculator that calculates a first alteration-induced value related to a first evaluation value for each operator of each radio apparatus in the own cluster under an assumption of increasing/decreasing the radio resource of each operator of each radio apparatus in the own cluster;

a second calculator that calculates a second alteration-induced value related to a second evaluation value for each combination of radio apparatuses of each operator, enabling the capacity of the radio resource of each radio apparatus in the own cluster to satisfy a first prescribed quantity under an assumption of increasing/decreasing the radio resource of each operator for each combination of a plurality of radio apparatuses in the own cluster; and

the first notification processor circuitry that notifies the second communication control apparatus of the calculated first alteration-induced value and the second alteration-induced value, and

the second communication control apparatus includes:

the receiver that receives the first alteration-induced value and the second alteration-induced value individually from each first communication control apparatus; and

the decision processor circuitry that decides, for each cluster, a constraint information that maximizes the first alteration-induced value and the second alteration-induced value of each radio apparatus in all the clusters and under which a capacity of a radio resource allocated to each radio apparatus satisfies the first prescribed quantity and a calculation capacity of a radio resource allocated to each operator in an entire cluster satisfies the second prescribed quantity.

5 . The radio system according to claim 4 , wherein the second calculator calculates the second alteration-induced value related to the second evaluation value under an assumption of increasing/decreasing radio resources of one or other radio apparatuses constituting a combination of the radio apparatuses in the own cluster, specifically, under an assumption of increasing the radio resource of the one radio apparatus and decreasing the radio resource of another radio apparatus.

6 . The radio system according to claim 3 , wherein the reception quality information is Reference Signal Received Power (RSRP) between the terminal apparatus and the radio apparatus.

7 . The radio system according to claim 2 , wherein the radio resource is an allocation quantity of use bands.

8 . A communication control apparatus that is connected to a plurality of individual communication control apparatuses that each manages, for each cluster, a plurality of radio apparatuses shared by a plurality of operators, the communication control apparatus comprising:

a receiver that receives, from each individual communication control apparatus, an alteration-induced value related to an evaluation value for each operator of each radio apparatus in an own cluster under an assumption of increasing/decreasing a radio resource allocated to each operator of each radio apparatus in the own cluster;

decision processor circuitry that decides, for each cluster, a constraint condition that maximizes the alteration-induced value of each radio apparatus in all the clusters and under which a capacity of the radio resource allocated to each radio apparatus satisfies a first prescribed quantity and a calculation capacity of a radio resource allocated to each operator in an entire cluster satisfies a second prescribed quantity; and

notification processor circuitry that notifies each individual communication control apparatus that manages the cluster of the constraint condition decided for each cluster.