Base station apparatus, computer-readable storage medium, system, and control method
Provided is a base station apparatus mounted on a flight vehicle and forming a multi-cell comprising cells on the ground to provide a wireless communication service for a user terminal within the multi-cell, comprising: a location-information acquiring unit that acquires location information of a user terminal served by the multi-cell; a flight-vehicle-related information acquiring unit that acquires flight-vehicle-related information comprising location information and attitude information of the flight vehicle; a terminal identification unit that identifies, among the user terminals, a victim user terminal expected to receive interference from a cell other than a cell serving, based on the location information of the user terminals and the flight-vehicle-related information; and a scheduling control unit that controls, to prevent the interference, scheduling of wireless resources of a first cell being the cell serving the victim user terminal, and a second cell being the cell expected to interfere with the victim user terminal.
1 . A base station apparatus mounted on a flight vehicle and forming a multi-cell comprising a plurality of cells on the ground to provide a wireless communication service for a user terminal within the multi-cell, the base station apparatus comprising:
a location-information acquiring unit that acquires location information of a user terminal served by the multi-cell;
a flight-vehicle-related information acquiring unit that acquires flight-vehicle-related information comprising location information and attitude information of the flight vehicle;
a terminal identification unit that identifies, among a plurality of user terminals, each of which being the user terminal, a victim user terminal that is expected to receive interference from a cell other than a cell serving, based on the location information of the plurality of user terminals and the flight-vehicle-related information; and
a scheduling control unit that controls, in order to prevent the interference, scheduling of wireless resources of a first cell, which is the cell serving the victim user terminal, and a second cell, which is the cell expected to cause interference to the victim user terminal, wherein the scheduling control unit controls the scheduling of the wireless resources of the first cell and the second cell using a scheduling control scheme selected from a group of scheduling control schemes consisting of:
(a) control so as not to allocate a resource block in the second cell corresponding to a resource block allocated to the victim user terminal in the first cell to any user terminals served by the second cell,
(b) control so as to allocate a resource block in the second cell corresponding to a resource block allocated to the victim user terminal in the first cell to at least one selected from a plurality of user terminals served by the second cell, based on a distance to the victim user terminal, and
(c) control such that a resource block allocated to the victim user terminal in the first cell and a resource block allocated to a user terminal in the second cell, that has a distance shorter than a predetermined threshold to the victim user terminal, have at least either a different frequency band or a different time slot from each other.
2 . The base station apparatus according to claim 1 , wherein the scheduling control scheme (a) comprises controlling so as not to allocate a resource block in the second cell having a same frequency band and a same time slot as a resource block allocated to the victim user terminal in the first cell to any user terminals served by the second cell.
3 . The base station apparatus according to claim 1 , wherein the scheduling control scheme (b) comprises controlling so as to allocate a resource block in the second cell having a same frequency band and a same time slot as a resource block allocated to the victim user terminal in the first cell to at least one selected from a plurality of user terminals served by the second cell, based on a distance to the victim user terminal.
4 . The base station apparatus according to claim 1 , wherein the scheduling control scheme (b) comprises controlling so as to allocate a resource block in the second cell corresponding to a resource block allocated to the victim user terminal in the first cell to at least one, of a plurality of user terminals served by the second cell, that has a distance longer than a predetermined threshold to the victim user terminal.
5 . The base station apparatus according to claim 3 , wherein the scheduling control scheme (b) further comprises controlling so as to allocate a resource block in the second cell corresponding to a resource block allocated to the victim user terminal in the first cell to at least one, of a plurality of user terminals served by the second cell, that has a distance longer than a predetermined threshold to the victim user terminal.
6 . The base station apparatus according to claim 1 , wherein the scheduling control scheme (b) comprises controlling so as to allocate a resource block in the second cell corresponding to a resource block allocated to the victim user terminal in the first cell to at least one, of a plurality of user terminals served by the second cell, that has a longer distance to the victim user terminal.
7 . The base station apparatus according to claim 3 , wherein the scheduling control unit scheme (b) further comprises controlling so as to allocate a resource block in the second cell corresponding to a resource block allocated to the victim user terminal in the first cell to at least one, of a plurality of user terminals served by the second cell, that has a longer distance to the victim user terminal.
8 . The base station apparatus according to claim 1 , wherein the scheduling control scheme (c) comprises controlling such that a resource block allocated to the victim user terminal in the first cell and a resource block allocated to a user terminal in the second cell, that has a distance shorter than a predetermined threshold to the victim user terminal, have both a different frequency band and a different time slot from each other.
9 . A non-transitory computer-readable storage medium storing a program causing a computer to function as a base station apparatus mounted on a flight vehicle and forming a multi-cell comprising a plurality of cells on the ground to provide a wireless communication service for a user terminal within the multi-cell, the base station apparatus comprising:
a location-information acquiring unit that acquires location information of a user terminal served by the multi-cell;
a flight-vehicle-related information acquiring unit that acquires flight-vehicle-related information comprising location information and attitude information of the flight vehicle;
a terminal identification unit that identifies, among a plurality of user terminals, each of which being the user terminal, a victim user terminal that is expected to receive interference from a cell other than a cell serving, based on the location information of the plurality of user terminals and the flight-vehicle-related information; and
a scheduling control unit that controls, in order to prevent the interference, scheduling of wireless resources of a first cell, which is the cell serving the victim user terminal, and a second cell, which is the cell expected to cause interference to the victim user terminal, wherein the scheduling control unit controls the scheduling of the wireless resources of the first cell and the second cell using a scheduling control scheme selected from a group of scheduling control schemes consisting of:
(a) control so as not to allocate a resource block in the second cell corresponding to a resource block allocated to the victim user terminal in the first cell to any user terminals served by the second cell,
(b) control so as to allocate a resource block in the second cell corresponding to a resource block allocated to the victim user terminal in the first cell to at least one selected from a plurality of user terminals served by the second cell, based on a distance to the victim user terminal, and
(c) control such that a resource block allocated to the victim user terminal in the first cell and a resource block allocated to a user terminal in the second cell, that has a distance shorter than a predetermined threshold to the victim user terminal, have at least either a different frequency band or a different time slot from each other.
10 . A system comprising:
the base station apparatus according to claim 1 ; and
the flight vehicle.
11 . A system comprising:
the base station apparatus according to claim 2 ; and
the flight vehicle.
12 . A system comprising:
the base station apparatus according to claim 3 ; and
the flight vehicle.
13 . A system comprising:
the base station apparatus according to claim 4 ; and
the flight vehicle.
14 . A system comprising:
the base station apparatus according to claim 6 ; and
the flight vehicle.
15 . A control method executed by a base station apparatus mounted on a flight vehicle and forming a multi-cell comprising a plurality of cells on the ground to provide a wireless communication service for a user terminal within the multi-cell, the control method comprising:
acquiring location information of a user terminal served by the multi-cell;
acquiring flight-vehicle-related information comprising location information and attitude information of the flight vehicle;
identifying, among a plurality of user terminals, each of which being the user terminal, a victim user terminal that is expected to receive interference from a cell other than a cell serving, based on the location information of the plurality of user terminals and the flight-vehicle-related information; and
controlling, in order to prevent the interference, scheduling of wireless resources of a first cell, which is the cell serving the victim user terminal, and a second cell, which is the cell expected to cause interference to the victim user terminal, using a scheduling control scheme selected from a group of scheduling control schemes consisting of:
(a) control so as not to allocate a resource block in the second cell corresponding to a resource block allocated to the victim user terminal in the first cell to any user terminals served by the second cell,
(b) control so as to allocate a resource block in the second cell corresponding to a resource block allocated to the victim user terminal in the first cell to at least one selected from a plurality of user terminals served by the second cell, based on a distance to the victim user terminal, and
(c) control such that a resource block allocated to the victim user terminal in the first cell and a resource block allocated to a user terminal in the second cell, that has a distance shorter than a predetermined threshold to the victim user terminal, have at least either a different frequency band or a different time slot from each other.