Control device, control method, and program for efficient sharing of frequency resources in multiple cells

Abstract

To further facilitate a frequency resource reuse.SOLUTION: A control device permits a first terminal device that is assumed not to cause interference exceeding a predetermined level to both communication of a second cell and communication of a third cell among terminal devices connected to a first cell to use of a first frequency range to a third frequency range corresponding to the first cell to the third cell, respectively. The control device permits a second terminal device, which is assumed to cause interference exceeding the predetermined level to the communication of the second cell but not cause interference exceeding the predetermined level to the communication of the third cell, to use the first frequency range and the third frequency range, and does not permit the second terminal device to use a second frequency range. The control device allows a third terminal device assumed to cause interference exceeding the predetermined level to both the communication of the second cell and the communication of the third cell to use the first frequency range and does not allow the third terminal device to use the second frequency range and the third frequency range.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a technique for sharing frequency resources among multiple cells. [Background technology]

[0002] Improving frequency utilization efficiency is an ongoing challenge in wireless communication systems. For example, Non-Patent Document 1 describes a technology for improving frequency utilization efficiency of a soft reuse scheme in a cellular communication system, in which frequency resources allocated to a base station are used for communication of a terminal device located far from a base station device and in an area where multiple cells overlap, and frequency resources allocated to other base station devices are reused for communication of a terminal device located close to the base station device. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] 3GPP (registered trademark) Contribution, R1-050507, May 2005 Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention provides techniques that further promote the reuse of frequency resources. [Means for solving the problem]

[0005] A control device according to one aspect of the present invention is a control device that controls allocation of frequency resources for a plurality of cells each having a frequency range that does not overlap with one another and that should be used preferentially, and includes: an acquisition means for acquiring, for each terminal device connected to a first cell included in the plurality of cells, information corresponding to an amount of interference that a signal transmitted by the terminal device is expected to cause on communications in a second cell and a third cell included in the plurality of cells; and a notification means for notifying a processing device that provides the first cell of instruction information instructing allocation of frequency resources to the terminal device connected to the first cell, wherein the instruction information is for a first terminal device among the terminal devices that is expected not to cause interference exceeding a predetermined level on communications in both the second cell and the third cell to allocate a first frequency range corresponding to the first cell, a second frequency range corresponding to the second cell, and a third frequency range corresponding to the The information includes information instructing the use of a third frequency range corresponding to a third cell, allowing a second terminal device that is expected to cause interference exceeding the predetermined level to communications of the second cell but not to cause interference exceeding the predetermined level to communications of the third cell to use the first frequency range and the third frequency range but not to use the second frequency range, allowing a third terminal device that is expected to cause interference exceeding the predetermined level to communications of the third cell but not to cause interference exceeding the predetermined level to communications of the second cell to use the first frequency range and the second frequency range but not to use the third frequency range, and allowing a fourth terminal device that is expected to cause interference exceeding the predetermined level to both communications of the second cell and communications of the third cell to use the first frequency range but not to use the second frequency range and the third frequency range. [Effects of the Invention]

[0006] According to the present invention, it is possible to further promote the reuse of frequency resources. [Brief explanation of the drawings]

[0007] [Figure 1]FIG. 1 is a diagram illustrating an example of the configuration of a wireless communication system. [Figure 2] FIG. 1 illustrates frequency range reuse. [Figure 3] FIG. 2 is a diagram illustrating an example of a hardware configuration of a control device. [Figure 4] FIG. 2 is a diagram illustrating an example of a functional configuration of a control device. [Figure 5] FIG. 10 is a diagram illustrating an example of a flow of processing executed by a control device. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the scope of the invention as claimed, and not all combinations of features described in the embodiments are necessarily essential to the invention. Two or more of the features described in the embodiments may be combined in any desired manner. Furthermore, the same reference numerals are used to designate identical or similar components, and redundant descriptions will be omitted.

[0009] (System Configuration) FIG. 1 shows an example of the configuration of a wireless communication system according to this embodiment. This wireless communication system is, for example, a cellular communication system conforming to the cellular communication standard of the Third Generation Partnership Project (3GPP (registered trademark)). However, this is not limited to this, and the following discussion can be applied to a mobile communication system conforming to any wireless communication standard. In one example, this cellular communication system can be controlled in accordance with the Open-Radio Access Network (O-RAN) standard. That is, a control device 101 called an O-RAN RAN Intelligent Controller (RIC) controls the network by transmitting policy information and instruction information to processing devices called O-RAN Distributed Units (O-DUs) (processing devices 111, 121, and 131) corresponding to each base station device. Each processing device configures one or more cells via one or more antennas or transmission / reception points (TRPs). In the example of FIG. 1, processing device 111 provides cell 141 via antenna 112, processing device 121 provides cell 142 via antenna 122, and processing device 131 provides cell 143 via antenna 132. Note that the configuration in which O-RAN is used is just an example, and O-RAN does not necessarily have to be used. In that case, O-DU may simply be interpreted as a base station device, and RIC may be interpreted as a control device that controls one or more base station devices for control of at least multiple cells. Note that FIG. 1 shows an example in which one O-DU performs communication processing for one cell, but this is not limiting. That is, one O-DU may perform communication processing for multiple cells. Also, although only three cells are shown in FIG. 1, there may naturally be four or more cells.

[0010] Each terminal device connects to an antenna under one of the processing devices to perform communication. Here, in FIG. 1, each terminal device is labeled "A," "B," or "C," and the antenna 112 is labeled "A," the antenna 122 is labeled "B," and the antenna 132 is labeled "C." This indicates that the terminal device labeled "A" is connected to the processing device 111 via the antenna 112, the terminal device labeled "B" is connected to the processing device 121 via the antenna 122, and the terminal device labeled "C" is connected to the processing device 131 via the antenna 132. In other words, the terminal devices 113 to 116 belong to the cell 141, the terminal devices 123 to 125 belong to the cell 142, and the terminal devices 133 to 134 belong to the cell 143.

[0011] The control device 101 determines a frequency range that should be preferentially used in each of a plurality of cells. For example, as shown in the allocation example of Fig. 2, the control device 101 separately sets frequency ranges 201 to 203 that should be preferentially used for each of the cells 141 to 143. Conventionally, there is a technology that allows, for example, terminal devices connected to the cell 141 that are in a range that does not overlap with either the cell 142 or the cell 143 (that are in a position that does not interfere with communication in the cell 142 and communication in the cell 143) to use the frequency range that should be preferentially used in the cell 142 or the cell 143, thereby reusing frequency resources and making effective use of radio resources. 1, cell 141 has a first region 151 that overlaps with both cell 142 and cell 143, a second region 152 that overlaps with cell 142 but not with cell 143, a third region 153 that overlaps with cell 143 but not with cell 142, and a fourth region other than that. Conventionally, only terminal devices present in the fourth region were allowed to use a frequency range 202 that should be preferentially used in cell 142 and a frequency range 203 that should be preferentially used in cell 143, and terminal devices present in the first region 151 to third region 153 were allowed to use only the frequency range 201 that cell 141 could preferentially use.

[0012] In this embodiment, the reuse of frequency resources is further promoted. That is, conventionally, in the above-described second region 152, a terminal device connected to the cell 141 can use only the frequency range 201 that is to be preferentially used in the cell 141, but it is assumed that communication by the terminal device present in this second region 152 does not strongly interfere with communication in the cell 143. For this reason, in this embodiment, for example, as shown as a frequency range 232 in FIG. 2, a terminal device present in the second region 152 is permitted to use the frequency range 203 that is to be preferentially used in the cell 143. On the other hand, it is assumed that communication by the terminal device present in the second region 152 causes a high level of interference with communication in the cell 142. For this reason, the frequency range 202 that is to be preferentially used in the cell 142 is not permitted to be used, as shown as a frequency range 231 in FIG. 2. Similarly, a terminal device present in the third region 153 is likely to interfere with communications in cell 143, as shown in frequency ranges 241 and 242 in Fig. 2, and therefore is not allowed to use frequency range 203, but is allowed to use frequency range 202. Note that a terminal device present in the first region 151 is likely to interfere with communications in both cells 142 and 143, and therefore is not allowed to use frequency ranges 202 and 203, which should be used preferentially in cells 142 and 143, as shown in frequency ranges 221 and 222 in Fig. 2. Furthermore, a terminal device that does not belong to any of the first region 151 to third region 153 is unlikely to interfere with communications in either cell 142 or cell 143, and therefore is allowed to use frequency ranges 202 and 203, which should be used preferentially in cells 142 and 143, as shown in frequency ranges 211 and 212 in Fig. 2. 2 shows an example in which the frequency range is divided into three, but it may be divided into four or more. That is, when there are multiple cells in which terminal devices belonging to the multiple cells may interfere with each other, the frequency range available in the entire system may be divided into frequency ranges according to the number of the cells, for example.

[0013] In this embodiment, the control device 101 determines non-overlapping frequency ranges to be preferentially used in each cell as described above, and then identifies the location of each terminal device and determines the frequency range that each terminal device is allowed to use according to its location. For example, the control device 101 determines the frequency range that each of the terminal devices 113 to 116 connected to the cell 141 is allowed to use. For example, since it is assumed that the communication of the terminal device 113 does not cause a predetermined level of interference to both the communication of the cell 142 and the communication of the cell 143 (interference that causes the received signal strength at a predetermined level in the terminal device or base station device of another cell), it is determined that the terminal device 113 may use any of the frequency ranges 201 to 203. Since it is assumed that the communication of the terminal device 114 causes a predetermined level of interference to the communication of the cell 142 and the communication of the cell 143, it is determined that the terminal device 114 may use either the frequency range 201 or the frequency range 203, but is not allowed to use the frequency range 202. Since it is expected that the communication of the terminal device 115 will cause interference at a predetermined level to both the communication of the cell 142 and the communication of the cell 143, it is determined that the terminal device 115 can communicate using only the frequency range 201 and is not allowed to use the frequency range 202 and the frequency range 203. Since it is expected that the communication of the terminal device 116 will cause interference at a predetermined level to the communication of the cell 143 and will not cause interference at a predetermined level to the communication of the cell 142, it is determined that the terminal device 114 may use either the frequency range 201 or the frequency range 202 and is not allowed to use the frequency range 203. The control device 101 notifies the processing device 111, which executes processing related to the communication of the terminal device, of instruction information instructing each terminal device to perform communication according to the determined content.

[0014] Similarly, the control device 101 notifies the processing device 121 of information on frequency ranges to be used by the terminal devices 123 to 125 connected to the cell 142. For example, the control device 101 notifies the processing device 121 of instruction information instructing that the terminal device 123 may use any of the frequency ranges 201 to 203, that the terminal device 124 may use the frequency ranges 202 and 203 but is not allowed to use the frequency range 201, and that the terminal device 125 may use the frequency ranges 201 and 202 but is not allowed to use the frequency range 203. Furthermore, the control device 101 notifies the processing device 131 of instruction information instructing that the terminal device 133 may use any of the frequency ranges 201 to 203 and that the terminal device 134 should use the frequency range 203 but is not allowed to use the frequency ranges 201 and 202.

[0015] Note that, for example, if the terminal device 114 and the terminal device 124 both use the frequency range 203 that should be preferentially used in the cell 143, it is expected that their communications will interfere with each other. For this reason, the control device 101 may notify each processing device of the above-mentioned instruction information so that, for example, only one of them uses the frequency range 203. For example, when the terminal device 114 uses the frequency range 203, the control device 101 may notify the processing device 121 of instruction information instructing the terminal device 124 not to use the frequency range 203 but to use the frequency range 202. Similarly, for example, when the terminal device 124 uses the frequency range 203, the control device 101 may notify the processing device 111 of instruction information instructing the terminal device 114 not to use the frequency range 203 but to use the frequency range 201.

[0016] The control device 101 may acquire, for example, information on the location of a terminal device from each processing device. For example, the terminal device may measure its own location using a global positioning system (GPS) and notify the processing device that provides the cell to which it is connected of its location. The location of the terminal device may also be measured using other positioning methods, such as observed time difference of arrival (OTDOA). When positioning is performed on the network side, the positioning result may be notified to the control device 101 without going through the terminal device or the processing device. When positioning is performed in the terminal device, the positioning result is provided to the control device 101 via the processing device to which the terminal device is connected. When acquiring the location of the terminal device, the control device 101 determines whether the location is a location where multiple cells overlap. That is, the control device 101 may identify, for example, whether each terminal device connected to the cell 141 is located in the first region 151, the second region 152, the third region 153, or another region, based on the location of the terminal device.

[0017] The control device 101 may identify the geographical range of each cell based on, for example, history information about the past locations of terminal devices and which cells the terminal devices were connected to. For example, it is assumed that in the first region 151, terminal devices connected to any of the cells 141 to 143 exist with approximately equal frequency. Such a region may be determined to be a region where the cells 141 to 143 overlap. On the other hand, a region where only terminal devices connected to the cell 141 exist may be determined to be a region where the cells do not overlap. In this way, the control device 101 may identify the geographical range of each cell in advance based on the history of past communications. The control device 101 may also identify a geographical region where the cells overlap based on the location where a handover occurred and the history of which cells were moved between during the handover. For example, it is assumed that in the second region 152, handovers will occur between the cells 141 and 142, but will not occur between the cells 141 and 142 and between the cells 143 and 141. On the other hand, in the first area 151, it is expected that handovers will occur between cell 141 and cell 142, between cell 142 and cell 143, and between cell 143 and cell 141. In this way, the geographical range of each cell can be specified in advance based on the history of past communications. Furthermore, the control device 101 may determine whether each terminal device is located in an area where multiple cells overlap, assuming that, for example, cell 141 is within a predetermined distance from antenna 112, cell 142 is within a predetermined distance from antenna 122, and cell 143 is within a predetermined distance from antenna 132.

[0018] It is only necessary to determine whether communication by each terminal device is expected to cause interference exceeding a predetermined level to communication in a cell other than the cell to which the terminal device is connected, and the location of the terminal device does not have to be identified. In one example, the terminal device may report measurement results of reference signals received from each of the antennas 112, 122, and 132 to the processing device to which it is connected, and the processing device may notify the control device 101 of the measurement results. The control device 101 may estimate that a terminal device whose reception strength of radio signals from the antennas 112 and 122 is equal to or greater than a predetermined level and whose reception strength of a radio signal from the antenna 132 is sufficiently low is present in the second area 152. The control device 101 may also determine that a terminal device whose reception strength of radio signals from any of the antennas 112, 122, and 132 is equal to or greater than a predetermined level is present in the first area 151. In addition, the control device 101 can determine that a terminal device in which the reception strength of the radio signal from antenna 112 is above a predetermined level and the reception strength of the radio signal from antennas 122 and 132 is sufficiently low is present in an area where cells do not overlap.

[0019] Furthermore, for example, when there are multiple terminal devices connected to the cell 141, the control device 101 may notify the processing device 111 of instruction information instructing that the frequency range 202 be used with priority for terminal devices located farther from other cells 142 (i.e., terminal devices expected to cause less interference to communication in the cell 142). That is, the above-mentioned instruction information has been described as an example in which whether or not use of the frequency range 202 is permitted is determined depending on whether or not the amount of interference expected to cause communication in the cell 142 exceeds a predetermined level. However, the control device 101 may notify the processing device of instruction information so that the probability of using a non-prioritized frequency range (for example, the frequency range 202) is determined depending on the level of the expected amount of interference. The same applies to the cell 143. That is, when there are multiple terminal devices connected to the cell 141, the control device 101 may notify the processing device 111 of instruction information instructing that the frequency range 203 be used with priority for terminal devices located farther from other cells 143 (i.e., terminal devices expected to cause less interference to communication in the cell 143). If the amount of interference exceeds a predetermined level, the use of the non-prioritized frequency range may not be permitted, as described above. That is, the non-prioritized frequency range may be used within a range that does not exceed the predetermined level, but the instruction information may be generated so that the greater the amount of interference, the less likely the frequency range is to be used.

[0020] The processing device may determine frequency resources to be allocated to each terminal device based on instruction information for that terminal device, and may communicate with the terminal device using those frequency resources. That is, for example, to a terminal device that can use all of frequency ranges 201 to 203, any frequency resource within those frequency ranges may be allocated by the processing device. Also, for example, to a terminal device that can only use frequency range 201, any frequency resource within frequency range 201 may be allocated, and frequency resources within frequency ranges 202 and 203 may not be allocated. That is, the control device 101 may determine a large range of frequencies that may be allocated to each terminal device, and the processing device may allocate detailed frequency resources to each connected terminal device.

[0021] Furthermore, as in the past, under normal circumstances, the control device 101 may cause the terminal device to use a frequency range that should be preferentially used in other cells only when the terminal device is present in an area of ​​the connected cell that does not overlap with any other cell. Then, for example, when the number of terminal devices connected to a specific cell exceeds a predetermined number, the control device 101 may execute the above-described control process for the cell.

[0022] As described above, in this embodiment, the control device 101 identifies information corresponding to the amount of interference that communication by each terminal device is expected to cause to other cells (the amount of interference itself or the location of the terminal device), and based on that information, attempts to reuse frequency ranges that should be preferentially used in other cells. By promoting this reuse of frequency resources, it is possible to improve the frequency utilization efficiency of the entire wireless communication system.

[0023] (Device configuration) FIG. 3 shows an example of the hardware configuration of the control device 101. In one example, the control device 101 includes a processor 301, a ROM 302, a RAM 303, a storage device 304, and a communication circuit 305. The processor 301 is a computer including one or more processing circuits, such as a general-purpose CPU (Central Processing Unit) or an ASIC (Application Specific Integrated Circuit), and executes the overall processing of the device and each of the above-mentioned processes by reading and executing programs stored in the ROM 302 or the storage device 304. The ROM 302 is a read-only memory that stores information such as programs and various parameters related to the processing executed by the control device 101. The RAM 303 functions as a workspace when the processor 301 executes a program, and is a random access memory that stores temporary information. The storage device 304 is, for example, a removable external storage device. The communication circuit 305 is, for example, a circuit for communicating with other devices.

[0024] FIG. 4 shows an example of the functional configuration of the control device 101. The control device 101 includes, as its functional configuration, for example, a priority range determination unit 401, an interference amount information acquisition unit 402, an operating frequency determination unit 403, and an operating frequency notification unit 404. Note that FIG. 4 only shows functions particularly related to this embodiment, and various other functions that the control device 101 may have are not shown. For example, the control device 101 naturally has other general functions as an O-RAN RIC (Non-Real Time (RT) RIC or Near-RT RIC). Furthermore, the functional blocks in FIG. 4 are shown schematically, and the respective functional blocks may be realized as an integrated unit or may be further subdivided. Furthermore, the respective functions in FIG. 4 may be realized, for example, by the processor 301 executing a program stored in the ROM 302 or the storage device 304.

[0025] The priority range determination unit 401 determines a frequency range to be preferentially used in each cell (for example, the above-mentioned frequency ranges 201 to 203). The priority range determination unit 401 determines a frequency range corresponding to each cell based on, for example, the number of terminal devices connected to each cell, the traffic volume, and the ratio thereof. Note that if the frequency range to be preferentially used in each cell is determined in advance, the priority range determination unit 401 may be omitted. The interference amount information acquisition unit 402 acquires information corresponding to the amount of interference that communication of the terminal device is expected to cause on communication in an adjacent cell, such as the location of the terminal device connected to each cell. The usage frequency determination unit 403 identifies, based on the information acquired by the interference amount information acquisition unit 402, whether the amount of interference that communication of each terminal device is expected to cause on communication in an adjacent cell exceeds a predetermined level. Then, based on the identification result, the usage frequency determination unit 403 determines a frequency range that each terminal device is allowed to use. In other words, the usage frequency determination unit 403 determines whether each terminal device can reuse a frequency range to be preferentially used in another cell. Furthermore, the usage frequency determination unit 403 may determine the probability of using a frequency range that should be preferentially used in other cells (i.e., a frequency range other than the frequency range that should be preferentially used by those terminal devices) according to the degree of interference that each terminal device is expected to cause. The usage frequency notification unit 404 notifies the processing device to which the terminal device is connected of instruction information that indicates the probability of using the frequency range that each terminal device can use or the non-preferential frequency range determined by the usage frequency determination unit 403.

[0026] (Processing flow) Next, an example of the flow of processing executed by the control device 101 will be described with reference to Fig. 5. Since the details of each processing are as described above, only an outline of the processing will be described here, and the details and modified examples will not be described repeatedly.

[0027] The control device 101 first determines a frequency range to be used preferentially in each of the multiple cells to be controlled (S501). The control device 101 also acquires, for each terminal device connected to each of the multiple cells, information corresponding to the amount of interference that the terminal device's communication is expected to cause on communications in adjacent cells (S502). This information may be, for example, location information for each terminal device, or information that allows for direct estimation (or identification) of the amount of interference, such as information on the reception strength of radio waves received from a base station device (antenna) in each cell. The control device 101 then determines a frequency range that each terminal device is allowed to use based on a determination criterion, such as whether the communication of each terminal device interferes with communications in other cells by more than a predetermined level (S403). The control device 101 then notifies the processing device to which the terminal device is connected of instruction information indicating the frequency range determined for each terminal device (S404).

[0028] As described above, in this embodiment, the reuse of frequency ranges allocated to adjacent cells is promoted in communication of a terminal device connected to a specific cell through control by the control device 101. This makes it possible to improve frequency utilization efficiency of the entire wireless communication system.

[0029] The invention is not limited to the above-described embodiment, and various modifications and variations are possible within the scope of the gist of the invention.

Claims

1. A control device that controls allocation of frequency resources for a plurality of cells having non-overlapping frequency ranges that should be used preferentially, an acquisition means for acquiring, for each terminal device connected to a first cell included in the plurality of cells, information corresponding to an amount of interference that is expected to be caused by a signal transmitted by the terminal device on communications between a second cell and a third cell included in the plurality of cells; a notification means for notifying a processing device that provides the first cell of instruction information that instructs allocation of frequency resources to a terminal device connected to the first cell; and The instruction information is provided to the terminal device. permitting a first terminal device that is expected not to cause interference exceeding a predetermined level to both communication in the second cell and communication in the third cell to use a first frequency range corresponding to the first cell, a second frequency range corresponding to the second cell, and a third frequency range corresponding to the third cell; permitting a second terminal device that is expected to cause interference exceeding the predetermined level to communication in the second cell but not cause interference exceeding the predetermined level to communication in the third cell to use the first frequency range and the third frequency range, and not allowing the second terminal device to use the second frequency range; permitting a third terminal device that is expected to cause interference exceeding the predetermined level to communication in the third cell but not cause interference exceeding the predetermined level to communication in the second cell to use the first frequency range and the second frequency range, and not allowing the third frequency range to be used; permitting a fourth terminal device that is expected to cause interference exceeding the predetermined level to both communication in the second cell and communication in the third cell to use the first frequency range, and not allowing the fourth terminal device to use the second frequency range and the third frequency range; A control device comprising: information instructing the user to:

2. The method further includes determining means for determining non-overlapping frequency ranges to be preferentially used in each of the plurality of cells.

2. The control device according to claim 1.

3. the acquiring means acquires, for each terminal device connected to the second cell, information corresponding to an amount of interference that a signal transmitted by the terminal device is expected to cause to communication in the first cell and communication in the third cell; The notification means notifies the terminal device connected to the second cell of permitting a terminal device that is expected not to cause interference exceeding the predetermined level to communication in the first cell and communication in the third cell to use the first frequency range, the second frequency range, and the third frequency range; permitting a terminal device that is expected to cause interference exceeding the predetermined level to communication in the first cell but not cause interference exceeding the predetermined level to communication in the third cell to use the second frequency range and the third frequency range, and not allowing the terminal device to use the first frequency range; permitting a terminal device that is expected to cause interference exceeding the predetermined level to communication in the third cell but not cause interference exceeding the predetermined level to communication in the first cell to use the first frequency range and the second frequency range, and not allowing the terminal device to use the third frequency range; permitting a terminal device that is expected to cause interference exceeding the predetermined level to communication in the first cell and communication in the third cell to use the second frequency range, and not allowing the terminal device to use the first frequency range and the third frequency range; and notifying a processing device that provides the second cell of second instruction information instructing the processing device to provide the second cell.

2. The control device according to claim 1.

4. When it is assumed that neither the terminal device connected to the first cell nor the terminal device connected to the second cell will cause interference exceeding the predetermined level to the communication of the third cell, and when the notification means notifies the processing device that provides the first cell of the instruction information that causes the terminal device connected to the first cell to use the third frequency range, the notification means notifies the processing device that provides the second cell of the second instruction information that does not cause the terminal device connected to the second cell to use the third frequency range.

5. The instruction information includes information instructing a terminal device connected to the first cell that is expected to have a smaller amount of interference with communication in the second cell to use the second frequency range with higher priority, or a terminal device that is expected to have a smaller amount of interference with communication in the third cell to use the third frequency range with higher priority, among the terminal devices connected to the first cell. The control device according to claim 1, characterized in that it includes information instructing a terminal device that is expected to have a smaller amount of interference with communication in the third cell to use the third frequency range with higher priority.

6. Further comprising a determination means for determining whether each of the terminal devices connected to the first cell is the first terminal device, the second terminal device, the third terminal device, or the fourth terminal device; the information corresponding to the amount of interference for each of the terminal devices connected to the first cell is information for identifying a position of each of the terminal devices; The identification means identifies, among the terminal devices connected to the first cell, Identifying a terminal device that is present in a first area that is included in the first cell and is not included in the second cell or the third cell as the first terminal device; Identifying a terminal device that is present in a second area that is included in the first cell and the second cell and is not included in the third cell as the second terminal device; Identifying a terminal device that exists in a third area that is included in the first cell and the third cell and is not included in the second cell as the third terminal device; Identifying a terminal device present in a fourth area included in the first cell, the second cell, and the third cell as the fourth terminal device; 2. The control device according to claim 1.

7. 7. The control device according to claim 6, wherein the identification means determines whether a terminal device connected to the first cell is located within a range of each of the first cell, the second cell, and the third cell, assuming that the first cell, the second cell, and the third cell are within a predetermined distance range from an antenna that serves each cell.

8. 7. The control device according to claim 6, wherein the identification means identifies the ranges of the first cell, the second cell, and the third cell based on a location history of terminal devices that have previously connected to each of the first cell, the second cell, and the third cell, and determines whether the terminal device connected to the first cell is located within the range of each of the first cell, the second cell, and the third cell based on the ranges and the location of the terminal device connected to the first cell.

9. The control device according to claim 6, characterized in that the identification means identifies an overlapping range of the first cell, the second cell, and the third cell based on a history of locations where handovers occurred between the first cell, the second cell, and the third cell and which cells the terminal device moved between due to the handover, and identifies whether the terminal device is the first terminal device, the second terminal device, the third terminal device, or the fourth terminal device based on the overlapping range and the location of the terminal device connected to the first cell.

10. The control device is a device that functions as a RAN Intelligent Controller (RIC) of an Open-Radio Access Network (O-RAN), and the processing device is a device that functions as an O-RAN Distributed Unit (O-DU). The control device according to any one of claims 1 to 9.

11. A control method executed by a control device that controls allocation of frequency resources for a plurality of cells having non-overlapping frequency ranges that should be used preferentially, the method comprising: For each terminal device connected to a first cell included in the plurality of cells, acquiring information corresponding to an amount of interference that is expected to be caused by a signal transmitted from the terminal device on communications between a second cell and a third cell included in the plurality of cells; notifying a processing device that provides the first cell of instruction information that instructs allocation of frequency resources to a terminal device connected to the first cell; Including, The instruction information is provided to the terminal device. permitting a first terminal device that is expected not to cause interference exceeding a predetermined level to both communication in the second cell and communication in the third cell to use a first frequency range corresponding to the first cell, a second frequency range corresponding to the second cell, and a third frequency range corresponding to the third cell; permitting a second terminal device that is expected to cause interference exceeding the predetermined level to communication in the second cell but not cause interference exceeding the predetermined level to communication in the third cell to use the first frequency range and the third frequency range, and not allowing the second terminal device to use the second frequency range; permitting a third terminal device that is expected to cause interference exceeding the predetermined level to communication in the third cell but not cause interference exceeding the predetermined level to communication in the second cell to use the first frequency range and the second frequency range, and not allowing the third frequency range to be used; permitting a fourth terminal device that is expected to cause interference exceeding the predetermined level to both communication in the second cell and communication in the third cell to use the first frequency range, and not allowing the fourth terminal device to use the second frequency range and the third frequency range; The control method according to claim 1, further comprising:

12. A program for causing a computer provided in a control device to execute the control method according to claim 11.

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