JP2016136694A - Control device, control method, and control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device, a control method and a control program which can reduce the harmful effect of a carrier frequency even in the case that any of a plurality of carrier frequencies cannot be used.SOLUTION: The control device is a control device for outputting control information so as to control a base station which uses a plurality of carrier frequencies for radio communication with a terminal. The control device includes a carrier control part for determining the coverage of a carrier frequencies of other base stations, or the coverage of a second carrier frequency on the basis of the coverage of a first carrier frequency in the case of receiving notification showing that abnormality of a radio communication device of the base station device using the first carrier frequency among the plurality of carrier frequencies is detected, and an output part for outputting the control information about the determined coverage to the base station.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a control device, a control method, and a control program.

  In a wireless communication system, a base station device changes the coverage for each carrier frequency to be used by changing the tilt angle of the antenna device (see Patent Document 1).

JP2012-16015A

  However, the control device has a problem that when any one of the plurality of carrier frequencies cannot be used, the adverse effect cannot be reduced.

  An object of the present invention is to provide a control device, a control method, and a control program capable of reducing the adverse effect even when one of a plurality of carrier frequencies cannot be used.

  One aspect of the present invention is a control device that outputs control information for controlling a base station that uses a plurality of carrier frequencies for wireless communication with a terminal. When receiving a notification indicating that an abnormality of the radio communication device of the base station using the carrier frequency is detected, based on the coverage of the first carrier frequency, the coverage of the carrier frequency of the other base station, or the first 2 is a control device comprising: a carrier wave control unit that determines coverage of two carrier frequencies; and an output unit that outputs the control information regarding the determined coverage to the base station.

  In addition, according to an aspect of the present invention, when the coverage of the first carrier frequency is reduced, the carrier wave control unit is configured to increase the coverage of the carrier frequency of another base station or the coverage of the second carrier frequency. Device.

  Further, according to an aspect of the present invention, when the carrier wave control unit receives a notification indicating that the first carrier frequency has stopped, the carrier frequency coverage of another base station, or the second carrier frequency It is a control device that expands the coverage of the.

  Further, according to an aspect of the present invention, when the carrier wave control unit has received a notification indicating that the abnormality of the wireless communication device has been detected, the coverage of the carrier frequency of another base station, Alternatively, the control device expands the coverage of the second carrier frequency.

  Further, according to an aspect of the present invention, when the carrier wave control unit receives a notification indicating that the abnormality of the wireless communication device has been resolved, the carrier frequency coverage of another base station, or the second carrier frequency It is a control device that reduces the coverage.

  In one embodiment of the present invention, the first carrier frequency is a carrier frequency provided with a first coverage determination condition that is a first condition for determining coverage, and the second carrier frequency Is a control device that is a carrier frequency provided with a second coverage determination condition that is a second condition for determining the coverage.

  Further, according to an aspect of the present invention, when the carrier wave control unit receives a notification indicating that the coverage of the first carrier frequency has been recovered, the current second coverage determination condition is changed to the original first 2 is a control device for returning to the coverage determination condition 2.

  One embodiment of the present invention is a control device in which the control information is information for controlling a tilt angle of an antenna of the base station.

  One embodiment of the present invention is a control device in which the control information is information for controlling transmission power of the base station.

  One embodiment of the present invention is a control device in which the carrier wave control unit determines a carrier frequency coverage of another base station or a coverage of the second carrier frequency for the plurality of base stations.

  One embodiment of the present invention is a control device in which the carrier wave control unit is provided separately from the base station.

  One embodiment of the present invention is a control device in which the carrier wave control unit is distributed and provided in a plurality of the base stations.

  Another aspect of the present invention is a control method in a control apparatus that outputs control information for a base station that uses a plurality of carrier frequencies for wireless communication with a terminal, the plurality of carrier frequencies. The second carrier frequency based on the coverage of the first carrier frequency when a notification indicating that an abnormality of the wireless communication device of the base station using the first carrier frequency is detected is received. The control method includes the steps of: determining the coverage, and outputting the control information regarding the determined coverage to the base station.

  Further, according to one aspect of the present invention, a computer in a control apparatus that outputs control information whose control target is a base station that uses a plurality of carrier frequencies for wireless communication with a terminal, among the plurality of carrier frequencies, When receiving a notification indicating that an abnormality of the radio communication device of the base station using the first carrier frequency has been detected, the coverage of the second carrier frequency is determined based on the coverage of the first carrier frequency. A control program for executing a procedure for determining and a procedure for outputting the control information about the determined coverage to the base station.

  According to the present invention, when the carrier wave control unit receives a notification indicating that an abnormality is detected in the radio communication device of the base station using the first carrier frequency among the plurality of carrier frequencies, Based on the carrier frequency coverage, the second carrier frequency coverage is determined. Thereby, the control device, the control method, and the control program can reduce the adverse effects even when any one of the plurality of carrier frequencies cannot be used.

It is a block diagram which shows the radio | wireless communications system in 1st Embodiment of this invention. It is explanatory drawing which shows the example of the coverage in 1st Embodiment of this invention. It is explanatory drawing which shows the tilt angle in 1st Embodiment of this invention. It is a figure which shows the example of the carrier wave frequency, the use of a carrier frequency, and the tilt angle of an antenna apparatus in 1st Embodiment of this invention. It is a figure which shows the 1st example of the coverage determination conditions in 1st Embodiment of this invention. It is a figure which shows the 2nd example of the coverage determination conditions in 1st Embodiment of this invention. It is a figure which shows the 1st example of the coverage in 1st Embodiment of this invention. It is a figure which shows the example of the method of supplementing the coverage lost in the 1st example of the coverage in 1st Embodiment of this invention. It is a figure which shows the 2nd example of the coverage in 1st Embodiment of this invention. It is a figure which shows the example of the method of supplementing the coverage lost in the 2nd example of the coverage in 1st Embodiment of this invention. It is a sequence diagram which shows operation | movement of the radio | wireless communications system in 1st Embodiment of this invention. It is a block diagram which shows the radio | wireless communications system in 2nd Embodiment of this invention. It is a sequence diagram which shows operation | movement of the radio | wireless communications system in 2nd Embodiment of this invention.

[First Embodiment]
A first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram showing a wireless communication system 1. The wireless communication system 1 includes a control device 10, a plurality of base station devices 20, a tilt control device 30, an antenna device 31, and one or more terminal devices 40. The control device 10 performs centralized control of the base station devices 20-1 to 20-M (M is an integer equal to or greater than 2) via a wired or wireless communication line.

  Hereinafter, with respect to matters common to the base station devices 20-1 to 20-M, a part of the reference numerals are omitted and referred to as “base station device 20”. Items common to the tilt control devices 30-1 to 30-M are denoted as “tilt control device 30” while omitting some of the reference numerals. Items common to the antenna devices 31-1 to 31 -M are denoted as “antenna device 31” by omitting a part of the reference numerals.

  The base station apparatus 20 performs radio communication with the terminal apparatus 40 existing within the coverage of the own apparatus, using radio waves of a plurality of carrier frequencies. The coverage is determined for each carrier frequency according to the tilt angle of the antenna device 31. Examples of the carrier frequency include 800 MHz band, 1.5 GHz band, and 2 GHz band. Based on the centralized control by the control device 10, the base station device 20 transmits an instruction to change the tilt angle of the antenna device 31 (hereinafter referred to as “tilt angle change instruction”) to the tilt control device 30.

A tilt control device 30 (remote tilt unit) (RET: Remote Electrical Tilt Unit) changes the tilt angle of the antenna device 31 for each carrier frequency in response to a tilt angle change instruction. The tilt control device 30 may be built in the antenna device 31.
The antenna device 31 can transmit and receive radio waves having a plurality of carrier frequencies to and from the terminal device 40. The tilt angle of the antenna device 31 is determined for each carrier frequency. That is, the tilt angle of the antenna device 31 is determined for each coverage.

  FIG. 2 is an explanatory diagram illustrating an example of coverage. The base station device 20 performs wireless communication with the terminal device 40 existing in the coverage Cov_f1 using the carrier frequency f1. Moreover, the base station apparatus 20 may perform radio | wireless communication between the terminal devices 40 which exist in coverage Cov_f2 using the carrier frequency f2. It is determined that coverage is provided in an area (area) where the state of communication connection with the terminal device 40 exists. On the other hand, it is determined that there is a region (coverage hole) where coverage is not present in a region where the state of communication connection with the terminal device 40 does not exist for a predetermined period.

  FIG. 3 is an explanatory diagram showing the tilt angle. The base station device 20, the tilt control device 30, and the antenna device 31 are provided on the roof of a building Bu, for example. The main lobe direction DirBM is a directing direction of the main lobe BM of the vertical radiation pattern of the antenna device 31. Further, the tilt angle θ_tilt of the antenna device 31 of the base station device 20 is a depression angle formed by the horizontal direction DirH and the main lobe direction DirBM with reference to the horizontal direction DirH.

  The main lobe direction DirBM moves toward the ground Gr as the tilt angle θ_tilt increases, that is, as the antenna device 31 is tilted down. Therefore, the coverage of the base station apparatus 20 decreases as the tilt angle θ_tilt increases. In other words, the main lobe direction DirBM approaches the horizontal direction DirH as the tilt angle θ_tilt decreases, that is, as the antenna device 31 is tilted up. Therefore, the coverage of the base station apparatus 20 increases as the tilt angle θ_tilt decreases.

  FIG. 4 is a diagram illustrating an example of the carrier frequency, the usage of the carrier frequency, and the tilt angle of the antenna device 31. The usage of the carrier frequency is determined by the operation policy of the base station apparatus 20. The usage “coverage” is, for example, a usage in which priority is given to the expansion of coverage over the increase in capacity (traffic load). In addition, the usage “capacity” is a usage in which an increase in capacity is given priority over an increase in coverage, for example.

  In FIG. 4, the carrier frequency “carrier frequency f1”, the usage “coverage” of the carrier frequency, the tilt angle “8 degrees”, and the adjustment angle “± 0.2 degrees” are associated with each other. The carrier frequency “carrier frequency f2”, the carrier frequency application “coverage or capacity”, the tilt angle “4 degrees”, and the adjustment angle “± 0.2 degrees” are associated with each other. The carrier frequency “carrier frequency f3”, the carrier frequency application “coverage or capacity”, the tilt angle “4 degrees”, and the adjustment angle “± 4 degrees” are associated with each other. These are only examples. For example, the carrier frequency may include a band close to the carrier frequency.

The configuration of the control device 10 will be described.
The control device 10 includes a carrier wave control unit 11 and an output unit 12. In the first embodiment, the carrier wave control unit 11 is concentrated on a control device 10 (maintenance control console) (EMS: Element Management System) different from the base station device 20. The carrier wave control unit 11 includes a coverage determination condition storage unit 51, a coverage determination unit 52, and a base station management information storage unit 53.

  The coverage determination condition storage unit 51 stores information indicating a condition for determining the coverage of the base station device 20 (hereinafter referred to as “coverage determination condition”). Hereinafter, a coverage usage condition that prioritizes coverage over capacity and determines the coverage is referred to as a “first coverage determination condition”. In addition, a capacity usage condition that prioritizes capacity over coverage and determines the coverage is referred to as a “second coverage determination condition”.

  FIG. 5 is a diagram illustrating a first example of coverage determination conditions. In the first example of the coverage determination condition, the first carrier frequency is a carrier frequency provided with the first coverage determination condition. The second carrier frequency is a carrier frequency provided with a first coverage determination condition. The third carrier frequency is a carrier frequency provided with a second coverage determination condition. Hereinafter, a device including at least one of the wireless unit 23, the signal processing unit 24, and the antenna device 31 is referred to as a “wireless communication device”.

  When a failure occurs in the wireless communication apparatus having the first carrier frequency, the carrier wave control unit 11 maintains the coverage of the second carrier frequency. In addition, when a failure occurs in the wireless communication device having the first carrier frequency, the carrier wave control unit 11 increases the traffic load in the coverage of the second carrier frequency, so that the coverage of the second carrier frequency and the other carrier Perform traffic load adjustments with frequency coverage. The coverage of another carrier frequency may be the coverage of another base station apparatus 20.

  Further, the carrier wave control unit 11 expands the coverage of the third carrier frequency as much as possible so as to reduce the traffic load in the coverage of the second carrier frequency when a failure occurs in the wireless communication device of the first carrier frequency. To do.

  For example, when a failure occurs in the wireless communication device of the first carrier frequency and the traffic load in the coverage of the second carrier frequency increases to a predetermined threshold or more, the carrier wave control unit 11 increases the coverage of the third carrier frequency. Expanding. The carrier wave control unit 11 may check whether the coverage is in the same range as the coverage of the first carrier frequency. If not, the carrier wave control unit 11 may expand the coverage of the third carrier frequency.

  For example, the carrier wave control unit 11 expands the coverage of the third carrier frequency when a failure occurs in the wireless communication device of the first carrier frequency and the first carrier frequency stops for a predetermined time or longer. .

For example, the carrier wave control unit 11 causes a failure in the radio communication apparatus of the first carrier frequency, and the traffic load in the coverage of the second carrier frequency and the traffic load in the coverage of the third carrier frequency are both When it increases to a predetermined threshold value or more, the coverage by the other base station apparatus 20 is executed in consideration of the traffic load of the other base station apparatus 20 in cooperation with the other base station apparatus 20.
Further, the carrier wave control unit 11 may independently control the coverage of the third carrier frequency when a failure occurs in the wireless communication device of the first carrier frequency.

  When a failure occurs in the radio communication apparatus of the second carrier frequency, the carrier wave control unit 11 maintains the coverage of the first carrier frequency. In addition, when a failure occurs in the radio communication apparatus of the second carrier frequency, the carrier wave control unit 11 increases the traffic load in the coverage of the first carrier frequency, so that the coverage of the first carrier frequency and other carriers Perform traffic load adjustments with frequency coverage. The coverage of another carrier frequency may be the coverage of another base station apparatus 20.

  Further, the carrier wave control unit 11 expands the coverage of the third carrier frequency as much as possible so as to reduce the traffic load in the coverage of the first carrier frequency when a failure occurs in the radio communication device of the second carrier frequency. To do.

  For example, when a failure occurs in the radio communication apparatus of the second carrier frequency and the traffic load in the coverage of the first carrier frequency increases to a predetermined threshold or more, the carrier wave control unit 11 increases the coverage of the third carrier frequency. Expanding. The carrier wave control unit 11 may confirm whether or not the coverage is in the same range as the coverage of the second carrier frequency. If not, the carrier wave control unit 11 may expand the coverage of the third carrier frequency.

  For example, the carrier wave control unit 11 expands the coverage of the third carrier frequency when a failure occurs in the radio communication device of the second carrier frequency and the second carrier frequency stops for a predetermined time or longer. .

For example, the carrier control unit 11 causes a failure in the radio communication apparatus of the second carrier frequency, and the traffic load in the coverage of the first carrier frequency and the traffic load in the coverage of the third carrier frequency are both When it increases to a predetermined threshold value or more, the coverage by the other base station apparatus 20 is executed in consideration of the traffic load of the other base station apparatus 20 in cooperation with the other base station apparatus 20.
In addition, the carrier wave control unit 11 may control the coverage of the third carrier frequency independently when a failure occurs in the radio communication device of the second carrier frequency.

  When a failure occurs in the wireless communication device of the third carrier frequency, the carrier wave control unit 11 maintains the coverage of the first carrier frequency. In addition, when a failure occurs in the wireless communication apparatus having the third carrier frequency, the carrier wave control unit 11 increases the traffic load in the coverage of the first carrier frequency, so that the coverage of the first carrier frequency and the other carrier Perform traffic load adjustments with frequency coverage. In addition, when a failure occurs in the wireless communication device having the third carrier frequency, the carrier wave control unit 11 increases the traffic load in the coverage of the second carrier frequency, so that the coverage of the second carrier frequency and the other carrier Perform traffic load adjustments with frequency coverage. The coverage of another carrier frequency may be the coverage of another base station apparatus 20.

  FIG. 6 is a diagram illustrating a second example of coverage determination conditions. In the second example of the coverage determination condition, the first carrier frequency is a carrier frequency provided with the first coverage determination condition. The second carrier frequency is a carrier frequency provided with a first coverage determination condition. The third carrier frequency is a carrier frequency provided with the first coverage determination condition, unlike the first example of the coverage determination condition.

  When a failure occurs in the wireless communication apparatus having the first carrier frequency, the carrier wave control unit 11 maintains the coverage of the second carrier frequency. In addition, when a failure occurs in the wireless communication device having the first carrier frequency, the carrier wave control unit 11 increases the traffic load in the coverage of the second carrier frequency, so that the coverage of the second carrier frequency and the other carrier Perform traffic load adjustments with frequency coverage.

  For example, when a failure occurs in the wireless communication device of the first carrier frequency and the traffic load in the coverage of the second carrier frequency increases to a predetermined threshold or more, the carrier wave control unit 11 detects the coverage of the third carrier frequency. Change redundancy.

  For example, when a failure occurs in the wireless communication apparatus having the first carrier frequency and the first carrier frequency is stopped for a predetermined time or longer, the carrier wave control unit 11 performs redundancy of coverage of the third carrier frequency. To change.

  For example, the carrier wave control unit 11 causes a failure in the radio communication apparatus of the first carrier frequency, and the traffic load in the coverage of the second carrier frequency and the traffic load in the coverage of the third carrier frequency are both When it increases to a predetermined threshold value or more, the coverage by the other base station apparatus 20 is executed in consideration of the traffic load of the other base station apparatus 20 in cooperation with the other base station apparatus 20.

  Further, the carrier wave control unit 11 maintains the coverage of the third carrier frequency when a failure occurs in the wireless communication device of the first carrier frequency. In addition, when a failure occurs in the wireless communication device having the first carrier frequency, the carrier wave control unit 11 increases the traffic load in the coverage of the third carrier frequency, so that the coverage of the third carrier frequency and the other carrier Perform traffic load adjustments with frequency coverage. The coverage of another carrier frequency may be the coverage of another base station apparatus 20.

  When a failure occurs in the radio communication apparatus of the second carrier frequency, the carrier wave control unit 11 maintains the coverage of the first carrier frequency. In addition, when a failure occurs in the radio communication apparatus of the second carrier frequency, the carrier wave control unit 11 increases the traffic load in the coverage of the first carrier frequency, so that the coverage of the first carrier frequency and other carriers Perform traffic load adjustments with frequency coverage.

  For example, when a failure occurs in the radio communication apparatus of the second carrier frequency and the traffic load in the coverage of the first carrier frequency increases to a predetermined threshold or more, the carrier wave control unit 11 detects the coverage of the third carrier frequency. Change redundancy.

  For example, when a failure occurs in the wireless communication apparatus having the second carrier frequency and the second carrier frequency is stopped for a predetermined time or longer, the carrier wave control unit 11 determines the redundancy of the coverage of the third carrier frequency. To change.

  For example, the carrier control unit 11 causes a failure in the radio communication apparatus of the second carrier frequency, and the traffic load in the coverage of the first carrier frequency and the traffic load in the coverage of the third carrier frequency are both When it increases to a predetermined threshold value or more, the coverage by the other base station apparatus 20 is executed in consideration of the traffic load of the other base station apparatus 20 in cooperation with the other base station apparatus 20.

  Further, the carrier wave control unit 11 maintains the coverage of the third carrier frequency when a failure occurs in the wireless communication device of the second carrier frequency. In addition, when a failure occurs in the radio communication apparatus of the second carrier frequency, the carrier wave control unit 11 increases the traffic load in the coverage of the third carrier frequency, so that the coverage of the third carrier frequency and other carriers Perform traffic load adjustments with frequency coverage. The coverage of another carrier frequency may be the coverage of another base station apparatus 20.

  When a failure occurs in the wireless communication device of the third carrier frequency, the carrier wave control unit 11 maintains the coverage of the first carrier frequency. In addition, when a failure occurs in the wireless communication apparatus having the third carrier frequency, the carrier wave control unit 11 increases the traffic load in the coverage of the first carrier frequency, so that the coverage of the first carrier frequency and the other carrier Perform traffic load adjustments with frequency coverage.

  For example, when a failure occurs in the wireless communication device of the third carrier frequency and the traffic load in the coverage of the first carrier frequency increases to a predetermined threshold or more, the carrier wave control unit 11 detects the coverage of the third carrier frequency. Change redundancy.

  For example, when a failure occurs in the wireless communication apparatus having the second carrier frequency and the second carrier frequency is stopped for a predetermined time or longer, the carrier wave control unit 11 determines the redundancy of the coverage of the third carrier frequency. To change.

  For example, the carrier control unit 11 causes a failure in the radio communication apparatus of the second carrier frequency, and the traffic load in the coverage of the first carrier frequency and the traffic load in the coverage of the third carrier frequency are both When it increases to a predetermined threshold value or more, the coverage by the other base station apparatus 20 is executed in consideration of the traffic load of the other base station apparatus 20 in cooperation with the other base station apparatus 20.

  Further, the carrier wave control unit 11 maintains the coverage of the second carrier frequency when a failure occurs in the wireless communication device of the third carrier frequency. In addition, when a failure occurs in the wireless communication device of the third carrier frequency, the carrier wave control unit 11 increases the traffic load in the coverage of the third carrier frequency, so that the coverage of the second carrier frequency and other carriers Perform traffic load adjustments with frequency coverage. The coverage of another carrier frequency may be the coverage of another base station apparatus 20.

  Returning to FIG. 1, the description of the configuration example of the wireless communication system 1 will be continued. The base station management information storage unit 53 stores management information of the base station device 20. The management information of the base station device 20 is information such as a carrier frequency used by the base station device 20, coverage of the base station device 20, or an operation policy of the base station device 20, for example. The management information of the base station device 20 may be information (see FIG. 4) including the carrier frequency, the use of the carrier frequency, and the tilt angle of the antenna device 31 in association with each other.

  The coverage determination condition storage unit 51 and the base station management information storage unit 53 are, for example, non-volatile storage media (non-temporary storage media) such as ROM (Read Only Memory), flash memory, HDD (Hard Disk Drive), etc. ). The coverage determination condition storage unit 51 and the base station management information storage unit 53 may include, for example, a volatile storage medium such as a RAM (Random Access Memory) or a register. The coverage determination condition storage unit 51 and the base station management information storage unit 53 may store a program for operating the software function unit.

  The coverage determining unit 52 receives base station information (described later) from the base station apparatus 20. The coverage determining unit 52 determines the coverage of the base station apparatus 20 for each carrier frequency used by the base station apparatus 20 based on the received base station information, the management information of the base station apparatus 20, and the coverage determination condition. To do. The coverage determining unit 52 transmits information regarding the determined coverage to the output unit 12. The information on the determined coverage includes, for example, a tilt angle change instruction and an instruction to change the transmission power of a radio wave transmitted from the antenna of the antenna device 31 (hereinafter referred to as “transmission power change instruction”). The transmission power change instruction is, for example, an instruction to change the transmission power of the radio wave transmitted from the antenna of the antenna device 31 for each sector.

  The coverage determination unit 52 is a software function unit that functions when a processor such as a CPU (Central Processing Unit) executes a program stored in the coverage determination condition storage unit 51 or the base station management information storage unit 53, for example. . Some or all of these functional units may be hardware functional units such as LSI (Large Scale Integration) and ASIC (Application Specific Integrated Circuit).

  The output unit 12 receives information regarding the determined coverage from the coverage determination unit 52. The output unit 12 transmits coverage control information to the base station apparatus 20 based on the information related to the determined coverage. The coverage control information includes at least one of a tilt angle change instruction and a transmission power change instruction. The coverage control information may include a parameter for controlling the antenna of the antenna device 31 (hereinafter referred to as “antenna parameter”). The antenna parameters are, for example, antenna gain, beam width, horizontal radio parameter, vertical radio parameter, and the like. The antenna parameter is determined based on the coverage control information.

A configuration of the base station apparatus 20 will be described.
The base station device 20 includes an information output unit 21, a control unit 22, a radio unit 23, and a signal processing unit 24. The information output unit 21 outputs base station information to the coverage determination unit 52 of the control device 10. The base station information includes at least one of coverage quality information and traffic load information.

  The coverage quality information is information indicating the wireless communication quality of coverage for each carrier frequency of the base station device 20. For example, the coverage quality information includes common pilot channel (CPICH: Common Pilot Channel) received power (CPICH RSCP: Received Signal Code Power), common pilot channel received quality (CPICH Ec / No), downlink (base station apparatus 20). Link to terminal device 40) Reference signal received power (RSRP), downlink reference signal received quality (RSRQ), CQI (Channel Quality Indicator), Information such as a connection rate or a call loss rate.

  The traffic load information is information indicating the traffic load of the base station device 20. The traffic load information is information indicating the traffic load for each base station device 20. Further, the traffic load information may be information indicating the traffic load for each coverage. For example, the traffic load information includes the number of terminal devices 40 connected to the base station device 20 (the number of connected terminals per cell), the sector throughput of the terminal device 40 connected to the base station device 20, or the base station device 20 This is information such as the usage rate of radio resources.

  The carrier frequency to be controlled by the control unit 22 may be a plurality of carrier frequencies used by the base station apparatus 20, and is not limited to a specific carrier frequency. Hereinafter, the description will be continued assuming that the carrier frequency is, for example, the first carrier frequency, the second carrier frequency, and the third carrier frequency. The first carrier frequency is, for example, the carrier frequency f1. The second carrier frequency is, for example, the carrier frequency f2. The third carrier frequency is, for example, the carrier frequency f3.

  The control unit 22 receives coverage control information from the output unit 12 of the control device 10. The control unit 22 includes a control function unit that controls the radio unit 23, the signal processing unit 24, and the tilt control device 30 for each carrier frequency to be controlled. The control unit 22 includes a first control unit 221, a second control unit 222, and a third control unit 223 as these control function units.

  The first control unit 221 executes control related to the first carrier frequency according to the operation mode based on the coverage control information. The second control unit 222 executes control related to the second carrier frequency according to the operation mode based on the coverage control information. The third control unit 223 performs control related to the third carrier frequency according to the operation mode based on the coverage control information. Hereinafter, items common to the first control unit 221, the second control unit 222, and the third control unit 223 will be described as items related to the control unit 22.

  The control unit 22 changes the coverage of the base station device 20 based on the coverage control information received from the output unit 12 of the control device 10. For example, the control unit 22 instructs the signal processing unit 24 to change the usage method of the carrier frequency based on the coverage control information. For example, when the tilt angle change instruction is included in the coverage control information, the control unit 22 transfers the tilt angle change instruction to the tilt control device 30 for each carrier frequency. For example, when the transmission power change instruction is included in the coverage control information, the control unit 22 transfers the transmission power change instruction to the radio unit 23 for each carrier frequency. For example, when the instruction to change the antenna parameter is included in the coverage control information, the control unit 22 transfers the instruction to change the antenna parameter to the radio unit 23 for each carrier frequency.

  The radio unit 23 changes the transmission power of the radio wave transmitted from the antenna of the antenna device 31 for each carrier frequency based on the transmission power change instruction. The radio unit 23 changes the antenna parameter of the antenna device 31 for each carrier frequency based on an instruction to change the antenna parameter. The radio unit 23 controls the antenna device 31 based on the usage method of the carrier frequency determined by the signal processing unit 24 and the antenna parameter.

  The signal processing unit 24 determines how to use the carrier frequency based on an instruction to change the method of using the carrier frequency. The signal processing unit 24 transmits information indicating how to use the carrier frequency to the wireless unit 23.

  Next, a description will be given of a method in which the control device 10 compensates for the coverage lost due to a failure due to a failure or the like by the coverage of another carrier frequency. 7 to 10, as an example, a description will be given of a method in which the control device 10 supplements coverage based on a first example of coverage determination conditions (see FIG. 5).

  FIG. 7 is a diagram illustrating a first example of coverage. Coverage Cov_f1-1 is coverage by radio waves of the first carrier frequency transmitted from the antenna device 31-1-1 controlled by the base station device 20-1. Coverage Cov_f3-1 is coverage by radio waves of the third carrier frequency transmitted from the antenna device 31-1-3 controlled by the base station device 20-1. Coverage Cov_f1-2 is coverage by radio waves of the first carrier frequency transmitted from the antenna device 31-2-1 controlled by the base station device 20-2. Coverage Cov_f3-2 is coverage by the radio wave of the third carrier frequency transmitted from the antenna device 31-2-3 controlled by the base station device 20-2.

  FIG. 8 is a diagram illustrating an example of a method of compensating for the coverage Cov_f1-1 lost in the first example of coverage illustrated in FIG. In FIG. 8, it is assumed that a failure has occurred in the wireless communication device of the first carrier frequency of the base station device 20-1. For this reason, in FIG. 8, coverage Cov_f1-1 is lost. The coverage determination unit 52 of the control device 10 acquires information indicating the first example of the coverage determination condition from the coverage determination condition storage unit 51 of the control device 10.

  The coverage determining unit 52 may expand the coverage Cov_f3-1 of the third carrier frequency based on the first example of the coverage determination condition because a failure has occurred in the wireless communication device of the first carrier frequency. Determine whether it is possible. If the traffic load of the coverage Cov_f3-1 of the third carrier frequency has a margin and the coverage determination unit 52 can expand the coverage Cov_f3-1 of the third carrier frequency, the coverage determination unit 52 Coverage Cov_f3-1 is expanded as much as possible.

  When there is no margin in the traffic load of the coverage Cov_f3-1 of the third carrier frequency and it is not possible to expand the coverage Cov_f3-1 of the third carrier frequency, the coverage determination unit 52 does not have the radio frequency of the first carrier frequency. Since a failure has occurred in the communication device, the traffic load is adjusted between the coverage of the base station device 20-1 and the coverage of the base station device 20-2 based on the first example of the coverage determination condition. Run. The coverage determining unit 52 determines whether or not the coverage Cov_f1-2 of the first carrier frequency can be expanded. If the traffic load of the coverage Cov_f1-2 of the first carrier frequency has a margin and the coverage determination unit 52 can expand the coverage Cov_f1-2 of the first carrier frequency, the coverage determination unit 52 Coverage Cov_f1-2 is expanded. When there is no margin in the traffic load of the coverage Cov_f1-2 of the first carrier frequency and the coverage determination unit 52 cannot expand the coverage Cov_f1-2 of the first carrier frequency, the coverage determination unit 52 covers the coverage of the third carrier frequency. Cov_f3-2 is expanded.

  Based on the result of this adjustment, the base station apparatus 20-2 expands coverage Cov_f1-2 and coverage Cov_f3-2, respectively. Thereby, the radio | wireless communications system 1 can supplement the lost coverage Cov_f1-1 with the coverage of the some carrier frequency which cooperated. In FIG. 8, the wireless communication system 1 can compensate for the lost coverage Cov_f1-1 by the coverage Cov_f3-1, the coverage Cov_f1-2, and the coverage Cov_f1-2.

  FIG. 9 is a diagram illustrating a second example of coverage. The second example of coverage is different from the first example of coverage shown in FIG. 7 in that coverage Cov_f2-1 of the second carrier frequency and coverage Cov_f2-2 of the second carrier frequency exist. Is a point. In FIG. 9, only differences from FIG. 7 will be described.

  Coverage Cov_f2-1 is coverage by radio waves of the second carrier frequency transmitted from the antenna device 31-1-2 controlled by the base station device 20-1. Coverage Cov_f2-2 is coverage by radio waves of the second carrier frequency transmitted from the antenna device 31-2-2 controlled by the base station device 20-2.

  FIG. 10 is a diagram illustrating an example of a method of compensating for the coverage Cov_f2-1 lost in the second example of coverage illustrated in FIG. The second example of coverage is different from the first example of coverage shown in FIG. 8 in that a failure has occurred in the radio communication device of the second carrier frequency of the base station device 20-1. Further, in the second example of coverage, the point that the coverage Cov_f2-2 of the second carrier frequency of the base station apparatus 20-2 exists is also different from the first example of coverage shown in FIG. In FIG. 10, only differences from FIG. 8 will be described.

  The coverage determination unit 52 maintains the coverage Cov_f1-1 of the first carrier frequency based on the first example of the coverage determination condition because a failure has occurred in the wireless communication device of the second carrier frequency. Moreover, since the failure has occurred in the wireless communication apparatus having the second carrier frequency, the coverage determination unit 52 expands the coverage Cov_f3-1 of the third carrier frequency based on the first example of the coverage determination condition. It is determined whether it is possible. If the traffic load of the coverage Cov_f3-1 of the third carrier frequency has a margin and the coverage determination unit 52 can expand the coverage Cov_f3-1 of the third carrier frequency, the coverage determination unit 52 Coverage Cov_f3-1 is expanded as much as possible.

  If there is no margin in the traffic load of the coverage Cov_f3-1 of the third carrier frequency and it is not possible to expand the coverage Cov_f3-1 of the third carrier frequency, the coverage determination unit 52 is configured to transmit the radio signal of the second carrier frequency. Since a failure has occurred in the communication device, the traffic load is adjusted between the coverage of the base station device 20-1 and the coverage of the base station device 20-2 based on the first example of the coverage determination condition. Run. The coverage determining unit 52 determines whether or not the coverage Cov_f2-2 of the second carrier frequency can be expanded. If the traffic load of the coverage Cov_f2-2 of the second carrier frequency has a margin and the coverage determination unit 52 can expand the coverage Cov_f2-2 of the second carrier frequency, the coverage determination unit 52 Coverage Cov_f2-2 is expanded. When there is no margin in the traffic load of the coverage Cov_f2-2 of the second carrier frequency and the coverage Cov_f2-2 of the second carrier frequency cannot be expanded, the coverage determination unit 52 covers the coverage of the third carrier frequency. Cov_f3-2 is expanded.

  Based on the result of this adjustment, the base station device 20-2 expands coverage Cov_f1-2, coverage Cov_f2-2, and coverage Cov_f3-2. Thereby, the radio | wireless communications system 1 can supplement the lost coverage Cov_f2-1 with the coverage of the some carrier frequency which cooperated. In FIG. 10, the radio communication system 1 can compensate for the lost coverage Cov_f1-1 by the coverage Cov_f1-1, the coverage Cov_f3-1, the coverage Cov_f2-2, and the coverage Cov_f3-2.

  Next, the operation of the wireless communication system 1 will be described. In FIG. 11, as an example, the case illustrated in FIG. 9, that is, the case where a failure occurs in the radio communication apparatus of the base station apparatus 20 that uses the second carrier frequency will be described.

  In the operation described with reference to FIG. 11, a wireless communication device that uses a frequency other than the second carrier frequency by replacing the first control unit 221, the second control unit 222, and the third control unit 223 with each other. The operation of the wireless communication system 1 when a failure occurs can be similarly described. That is, the notation of the first carrier frequency, the second carrier frequency, and the third carrier frequency is convenient and can be read.

FIG. 11 is a sequence diagram showing the operation of the wireless communication system 1. It is assumed that a failure or abnormality has occurred in the wireless communication device that uses the second carrier frequency.
The second control unit 222 notifies the coverage determination unit 52 via the information output unit 21 of a notification indicating that a failure has occurred in the wireless communication device that uses the second carrier frequency (S101).
The coverage determining unit 52 detects that a failure has occurred in the wireless communication device that uses the second carrier frequency (S102).
The coverage determining unit 52 detects that the failure has not been recovered for a certain time or longer (S103).

The coverage determining unit 52 determines whether there is a margin in the coverage of the first carrier frequency. When there is a margin in the coverage of the first carrier frequency, the coverage determination unit 52 ends the operation illustrated in FIG.
When there is no margin in the coverage of the first carrier frequency, the coverage determination unit 52 accesses the coverage determination condition storage unit 51 and acquires the coverage determination condition. The coverage determining unit 52 notifies the first control unit 221 of the operation mode “coverage mode (no redundancy)” (S104).
The first control unit 221 changes the operation mode to the coverage mode (no redundancy) based on the notified operation mode (S105).

When the coverage of the first carrier frequency is still not enough, the coverage determination unit 52 adjusts the coverage Cov_f3-1 and other coverages such as the coverage Cov_f3-2. For example, the coverage determination unit 52 sends a notification indicating that a failure has occurred in the wireless communication device using the second carrier frequency and information identifying the base station device 20 in which the failure has occurred to another base station. The station device 20 is notified. The other base station apparatus 20 that has received the notification expands the coverage while determining the traffic load. The coverage determining unit 52 notifies the third control unit 223 of the operation mode “coverage mode”. The coverage mode is an operation mode for operating for coverage use (S106).
The third control unit 223 changes the operation mode to the coverage mode based on the notified operation mode (S107).

  The coverage determining unit 52 accesses the base station management information storage unit 53 and refers to the base station management information. The coverage determining unit 52 notifies the third control unit 223 of the tilt angle of the antenna device 31-1-3 (S108).

  The third control unit 223 changes the tilt angle of the antenna device 31-1-3 via the tilt control device 30 so that the notified tilt angle is obtained. As a result, the coverage Cov_f3-1 shown in FIG. 10 is expanded (S109).

It is assumed that the failure of the wireless communication device using the second carrier frequency has been recovered or recovered. The second control unit 222 notifies the coverage determination unit 52 of a notification indicating that the failure of the wireless communication device using the second carrier frequency has been recovered (S110).
The coverage determining unit 52 detects that the failure of the wireless communication apparatus using the second carrier frequency has been recovered (S111).

The coverage determining unit 52 notifies the third control unit 223 of the operation mode “coverage mode (with redundancy)” (S112).
The first control unit 221 returns the operation mode to the coverage mode (with redundancy) based on the notified operation mode (S113).

The coverage determining unit 52 notifies the third control unit 223 of the operation mode “capacity mode”. The capacity mode is an operation mode for operating for capacity use (S114).
The third control unit 223 returns the operation mode to the capacity mode based on the notified operation mode (S115).

The coverage determining unit 52 accesses the base station management information storage unit 53 and refers to the base station management information. The coverage determining unit 52 notifies the third control unit 223 of the tilt angle of the antenna device 31-1-3 (S116).
The third control unit 223 changes the tilt angle of the antenna device 31-1-3 via the tilt control device 30 so that the notified tilt angle is obtained. As a result, the coverage Cov_f3-1 shown in FIG. 10 is restored (S117).

  As described above, the control device 10 outputs control information for which the base station device 20 that uses a plurality of carrier frequencies for wireless communication with the terminal device 40 is a control target. The control device 10 includes a carrier wave control unit 11 and an output unit 12. When the carrier wave control unit 11 receives a notification indicating that an abnormality has been detected in the radio communication device of the base station device 20 that uses the first carrier frequency among the plurality of carrier frequencies, the carrier wave control unit 11 Based on the coverage, the coverage of the second carrier frequency is determined. The output unit 12 outputs control information about the determined coverage to the base station apparatus 20. The abnormality of the radio communication device of the base station device 20 may be, for example, planned stoppage due to construction of the base station device 20.

With this configuration, when the carrier wave control unit 11 receives a notification indicating that an abnormality has been detected in the wireless communication device of the base station device 20 that uses the first carrier frequency among the plurality of carrier frequencies, The coverage of the second carrier frequency is determined based on the coverage of the second carrier frequency.
As a result, the wireless communication system 1, the control device 10, the control method, and the control program of the first embodiment can reduce the adverse effects even when any one of the plurality of carrier frequencies cannot be used.

  The carrier wave control unit 11 of the first embodiment may increase the coverage of the second carrier frequency when the coverage of the first carrier frequency is reduced. The carrier wave control unit 11 of the first embodiment may increase the coverage of the second carrier frequency when the coverage of the first carrier frequency is reduced.

The carrier wave control unit 11 of the first embodiment may expand the coverage of the second carrier frequency when a certain time has elapsed after receiving a notification indicating that an abnormality of the wireless communication device has been detected. The carrier wave control unit 11 of the first embodiment may reduce the coverage of the second carrier frequency when receiving a notification indicating that the abnormality of the wireless communication device has been resolved.
The first carrier frequency may be a carrier frequency provided with a first coverage determination condition. The second carrier frequency may be a carrier frequency provided with a second coverage determination condition.

When receiving the notification indicating that the coverage of the first carrier frequency has been recovered, the carrier wave control unit 11 of the first embodiment returns the current second coverage determination condition to the original second coverage determination condition. May be.
The control information may be information for controlling the tilt angle of the antenna device 31 of the base station device 20 (tilt angle change instruction). The control information may be information for controlling the transmission power of the base station apparatus 20 (transmission power change instruction).
Thereby, the radio | wireless communications system 1, the control apparatus 10, the control method, and the control program of 1st Embodiment can improve the capability to respond to various traffics, such as a coverage and traffic load.

[Second Embodiment]
The second embodiment is different from the first embodiment in that the carrier wave control unit 11 is provided distributed to a plurality of base station devices 20a. Only the differences from the first embodiment will be described below.

  FIG. 12 is a configuration diagram showing the wireless communication system 2. The wireless communication system 2 includes a plurality of base station devices 20a, a tilt control device 30, an antenna device 31, and one or more terminal devices 40. The base station apparatus 20a includes a control unit 22a, a radio unit 23, and a signal processing unit 24.

  The control unit 22a includes a control function unit that controls the radio unit 23, the signal processing unit 24, and the tilt control device 30 for each carrier frequency to be controlled. The control unit 22a includes a first control unit 221, a second control unit 222, and a third control unit 223 as these control function units. The control unit 22a further includes a carrier wave control unit 11. The first control unit 221, the second control unit 222, and the third control unit 223 operate according to distributed control by the carrier wave control unit 11 of the control unit 22a.

  Next, the operation of the wireless communication system 2 will be described. In FIG. 13, as an example, the case illustrated in FIG. 9, that is, the case where a failure occurs in the radio communication device of the base station device 20 that uses the second carrier frequency will be described.

  Note that in the operation described with reference to FIG. 13, a wireless communication device that uses a frequency other than the second carrier frequency by replacing the first control unit 221, the second control unit 222, and the third control unit 223 with each other. The operation of the wireless communication system 2 when a failure occurs can be similarly described.

  FIG. 13 is a sequence diagram showing the operation of the wireless communication system 2. It is assumed that a failure or abnormality has occurred in the wireless communication device that uses the second carrier frequency.

The second control unit 222 notifies the coverage determination unit 52 of a notification indicating that a failure has occurred in the wireless communication device that uses the second carrier frequency (S201).
The second control unit 222 detects that the failure has not been recovered for a certain time (S202).

The second control unit 222 determines whether there is a margin in the coverage of the first carrier frequency. When there is a margin in the coverage of the first carrier frequency, the coverage determination unit 52 ends the operation illustrated in FIG.
When there is no margin in the coverage of the first carrier frequency, the second control unit 222 accesses the coverage determination condition storage unit 51 and refers to the coverage determination condition. The second control unit 222 notifies the first control unit 221 of the operation mode “coverage mode (no redundancy)” (S203).
The first control unit 221 changes the operation mode to the coverage mode (no redundancy) based on the notified operation mode (S204).

If there is still no margin in the coverage of the first carrier frequency, the second control unit 222 notifies the third control unit 223 of the operation mode “coverage mode” (S205).
The third control unit 223 transmits a trigger signal to the other base station apparatus 20a in order to execute adjustment with other coverage such as the coverage Cov_f3-2 of the other base station apparatus 20a (S206).

The third control unit 223 changes the operation mode to the coverage mode based on the notified operation mode (S207).
The third control unit 223 changes the tilt angle of the antenna device 31-1-3 via the tilt control device 30. As a result, the coverage Cov_f3-1 shown in FIG. 10 is expanded (S208).

  It is assumed that the failure of the wireless communication device using the second carrier frequency has been recovered or recovered. The second control unit 222 detects that the failure of the wireless communication device using the second carrier frequency has been recovered (S209).

The second control unit 222 accesses the coverage determination condition storage unit 51 and refers to the coverage determination condition. The second control unit 222 notifies the first control unit 221 of the operation mode “coverage mode (with redundancy)” (S210).
The first control unit 221 returns the operation mode to the coverage mode (with redundancy) based on the notified operation mode (S211).

The second control unit 222 notifies the third control unit 223 of the operation mode “capacity mode” (S212).
The third control unit 223 transmits a trigger signal to the other base station apparatus 20a in order to perform adjustment with other coverage such as the coverage Cov_f3-2 of the other base station apparatus 20a (S213).

The third control unit 223 returns the operation mode to the capacity mode based on the notified operation mode (S214).
The third control unit 223 restores the tilt angle of the antenna device 31-1-3 via the tilt control device 30. As a result, the coverage Cov_f3-1 shown in FIG. 10 is restored (S215).

  As described above, the carrier wave control unit 11 of the second embodiment may be distributed and provided in the plurality of base station apparatuses 20a.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

  A program for realizing the wireless communication system 1, the wireless communication system 2, the control device 10, the base station device 20, and the base station device 20a described above is recorded on a computer-readable recording medium, and this recording is performed. The execution process may be performed by causing a computer system to read and execute a program recorded on a medium. Here, the “computer system” may include an OS and hardware such as peripheral devices.

  Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used. The “computer-readable recording medium” means a flexible disk, a magneto-optical disk, a ROM, a writable nonvolatile memory such as a flash memory, a portable medium such as a CD-ROM, a hard disk built in a computer system, etc. This is a storage device.

Further, the “computer-readable recording medium” refers to a volatile memory (for example, DRAM (Dynamic) in a computer system serving as a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. Random Access Memory)) that holds a program for a certain period of time is also included.
The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.
The program may be for realizing a part of the functions described above.
Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

DESCRIPTION OF SYMBOLS 1 ... Wireless communication system, 2 ... Wireless communication, 10 ... Control apparatus, 11 ... Carrier wave control part, 12 ... Output part, 20-1-M ... Base station apparatus, 20a-1-M ... Base station apparatus, 21 ... Information Output unit 22 ... control unit 22a ... control unit 23 ... radio unit 24 ... signal processing unit 30 ... tilt control device 31 ... antenna device 40 ... terminal device 51 ... coverage determination condition storage unit 52 ... Coverage determination unit, 53 ... base station management information storage unit, 221 ... first control unit, 222 ... second control unit, 223 ... third control unit, Bu ... building, BM ... main lobe, Cov_f1 ... first coverage, Cov_f2 ... second coverage, Cov_f3 ... third coverage, DirBM ... main lobe direction, DirH ... horizontal direction, θ_tilt ... tilt angle, Gr ... ground

Claims (14)

A control device that outputs control information for controlling a base station that uses a plurality of carrier frequencies for wireless communication with a terminal,
When receiving a notification indicating that an abnormality of the wireless communication device of the base station using the first carrier frequency among the plurality of carrier frequencies is detected, based on the coverage of the first carrier frequency, A carrier wave control unit that determines the coverage of the carrier frequency of another base station or the coverage of the second carrier frequency;
An output unit that outputs the control information about the determined coverage to the base station;
A control device comprising:   The control apparatus according to claim 1, wherein the carrier wave control unit increases the carrier frequency coverage of another base station or the coverage of the second carrier frequency when the coverage of the first carrier frequency is reduced.   The carrier control unit, when receiving a notification indicating that the first carrier frequency has stopped, expands the coverage of the carrier frequency of another base station or the coverage of the second carrier frequency. Or the control apparatus of Claim 2.   The carrier wave control unit, when a predetermined time has elapsed since receiving a notification indicating that an abnormality of the wireless communication device has been detected, the coverage of the carrier frequency of another base station, or the coverage of the second carrier frequency The control device according to claim 1, wherein the control device is enlarged.   The carrier control unit reduces the carrier frequency coverage of another base station or the coverage of the second carrier frequency when receiving a notification indicating that the abnormality of the wireless communication device has been resolved. The control device according to claim 4. The first carrier frequency is a carrier frequency provided with a first coverage determination condition that is a first condition for determining coverage;
6. The second carrier frequency according to claim 1, wherein the second carrier frequency is a carrier frequency provided with a second coverage determination condition that is a second condition for determining a coverage. 7. Control device.   The carrier control unit, when receiving a notification indicating that the coverage of the first carrier frequency has been recovered, returns the current second coverage determination condition to the original second coverage determination condition. Item 7. The control device according to Item 6.   The control device according to any one of claims 1 to 7, wherein the control information is information for controlling a tilt angle of an antenna of the base station.   The control apparatus according to any one of claims 1 to 7, wherein the control information is information for controlling transmission power of the base station.   10. The carrier control unit according to claim 1, wherein, for a plurality of the base stations, the carrier frequency coverage of another base station or the coverage of the second carrier frequency is determined. Control device.   The control apparatus according to any one of claims 1 to 10, wherein the carrier wave control unit is provided separately from the base station.   The control apparatus according to any one of claims 1 to 10, wherein the carrier wave control unit is provided in a distributed manner in a plurality of the base stations. A control method in a control device that outputs control information for controlling a base station that uses a plurality of carrier frequencies for wireless communication with a terminal,
When receiving a notification indicating that an abnormality of the wireless communication device of the base station using the first carrier frequency among the plurality of carrier frequencies is detected, based on the coverage of the first carrier frequency, Determining the coverage of the carrier frequency of another base station or the coverage of the second carrier frequency;
Outputting the control information for the determined coverage to the base station;
A control method. To a computer in a control device that outputs control information for controlling a base station that uses a plurality of carrier frequencies for wireless communication with a terminal,
When receiving a notification indicating that an abnormality of the wireless communication device of the base station using the first carrier frequency among the plurality of carrier frequencies is detected, based on the coverage of the first carrier frequency, Determining the carrier frequency coverage of another base station or the coverage of the second carrier frequency;
Outputting the control information for the determined coverage to the base station;
A control program to execute.

Images