Wireless communication interference control system, interference control method, relay device, and interference control program

Abstract

Provided is a radio communication interference control system that is suitable with respect to restricting the total amount of interferences caused by many interfering devices to interfered-with devices that are to be protected. The interference control system provides a control device disposed in a public network with resource applications based on messages issued by interfering devices, which are disposed in a service provider network, with respect to using radio resources. Responses based on messages issued by the control device with respect to the resource applications are provided to the interfering devices having issued their respective resource applications. When the interfering devices perform transmissions by use of respective frequency channels with a specified transmission power, a relay device 34 estimates, on the basis of interfered-with device information (1), an increased amount of the total amount of interferences caused in the respective ones of frequency channels used by the interfered-with devices (2). The estimation result of said increased amount is caused to be reflected by at least one of resource applications from the interfering devices and responses to the interfering devices (3).

Description

[Technical field]

[0001] The present disclosure relates to a wireless communication interference control system, an interference control method, a relay device, and an interference control program, and in particular to a wireless communication interference control system, an interference control method, a relay device, and an interference control program that are suitable for limiting the total amount of interference caused by a large number of interfering devices having wireless communication functions to other interfered devices that should be protected. [Background technology]

[0002] CBRS (Citizens Broadband Radio Service) proposed in the United States is known as a technology premised on the coexistence of an interfered device to be protected and multiple interferer devices that emit interference signals. More specifically, CBRS is a wireless communication technology that has a function of suppressing the total amount of interference to an interfered device when the interfered device and the interferer device share the same frequency band. Non-Patent Document 1 below describes technical standards related to CBRS.

[0003] In CBRS, for example, a victim device used by the government and multiple interference-causing devices (CBSD: Citizens Broadband Radio Service Devices) for private use each pre-register their location information in a control device (SAS: Spectrum Access System) via a network. The location information includes the latitude and longitude of each interference-causing device, as well as information indicating whether the device is installed indoors or outdoors.

[0004] Each interfering device transmits a request for use of wireless resources, including a frequency to be used and transmission power, to the control device. The control device, which receives the request, estimates the total amount of interference caused by all interfering devices to the interfered device. The total amount of interference is calculated from preregistered location information for each of the interfered device and the interfering device, the antenna gain and transmission power of each device, and the like. The control device then determines whether or not to accept the request for use depending on whether or not the estimated value of the total amount of interference falls within an allowable value, and returns the result of the determination as a response to the interfering device.

[0005] In CBRS, requests and responses between an interfering device and a control device may be exchanged directly or via a relay device (Domain Proxy). [Prior art documents] [Non-patent literature]

[0006] [Non-Patent Document 1] CBRS Baseline Standards, WINNF-TS-0016, CBRS WInnForum Standards, November 25, 2020, https: / / cbrs.wirelessinnovation.org / release-1-of-the-baseline-standard-specifications Summary of the Invention [Problem to be solved by the invention]

[0007] In the optical access services provided by telecommunications carriers, many subscribers use wireless devices such as wireless LAN access points. These wireless devices can be interference sources for interfered devices that should be protected, just like interferer devices in CBRS.

[0008] When CBRS technology is applied to the optical access service, it is assumed that the control device that controls the total amount of interference will be installed outside the network of the telecommunications carrier that provides the service. If the wireless device of the subscriber issues a free use request to the control device without any adjustment, the request may be made for a congested frequency channel, and the request may be rejected, resulting in a lot of unnecessary processing. Furthermore, an interfering device located near an interfered device may use the same frequency channel as the interfered device, and the frequency channel selection may be made without considering the location of the interfered device, greatly increasing the amount of interference.

[0009] The present disclosure has been made in consideration of the above-mentioned problems, and has a first objective to provide a wireless communication interference control system that can suppress unnecessary applications and provide good communication quality without causing a large amount of interference by having an interfering device prioritize applications on frequency channels that are less likely to interfere with communications of an interfered device.

[0010] A second object of the present disclosure is to provide an interference control method for wireless communication that can suppress unnecessary applications and provide good communication quality without causing a large amount of interference by having an interfering device prioritize applications on frequency channels that are less likely to cause interference to communications of an interfered device.

[0011] A third object of the present disclosure is to provide a wireless communication relay device that can suppress unnecessary applications and provide good communication quality without causing a large amount of interference by having an interfering device prioritize applications on frequency channels that are less likely to cause interference to communications of an interfered device.

[0012] A fourth object of the present disclosure is to provide a program for wireless communication interference control that can suppress unnecessary applications and provide good communication quality without causing a large amount of interference by having an interfering device prioritize applications on frequency channels that are less likely to cause interference to communications of an interfered device. [Means for solving the problem]

[0013] In order to achieve the above object, a first aspect is a wireless communication interference control system including a control device that controls an amount of interference caused by a plurality of interfering devices performing wireless communication to an interfered device whose wireless communication is to be protected, A relay device disposed between the interfering device and the control device includes a processor unit and a memory storing a program executed by the processor unit; The processor unit includes: A process of providing a resource request based on a message regarding the use of wireless resources issued by an interference device located in a carrier network to a control device located in a public network; providing a response based on a message issued by the control device to the interfering device that issued the resource request; A process of acquiring registration information regarding a part or all of a frequency channel used, a location, an antenna gain, and an acceptable amount of interference of the interfered device; obtaining information regarding the location, transmission power, antenna gain, and some or all of the available frequency channels of the interfering device; an increase amount estimation process for estimating whether or not a total amount of interference occurring in each of the operating frequency channels of the interfered device increases or the amount of increase when the interfering device transmits in each of the frequency channels with the transmission power; It is desirable to execute a reflection process for reflecting the estimated result of the increase amount in at least one of a resource request from the interfering device and a response to the interfering device in the form of at least one of a restriction and a correction.

[0014] A second aspect is a wireless communication interference control method using a control device in which a plurality of interfering devices performing wireless communication control an amount of interference caused to an interfered device whose wireless communication should be protected, providing a resource request based on a message regarding the use of radio resources issued by an interfering device located in the operator network to a control device located in the public network; providing a response to the resource request based on a message issued by the control device to the interfering device that issued the resource request; acquiring registration information regarding some or all of a frequency channel used, a location, an antenna gain, and an amount of acceptable interference of the interfered device; obtaining information regarding the location, transmit power, antenna gain, and some or all of the available frequency channels of the interfering device; A step of estimating whether or not a total amount of interference occurring in each of the operating frequency channels of the interfered device increases or the amount of increase when the interfering device transmits in each of the frequency channels with the transmission power; It is desirable to include a step of reflecting the estimated result of the increase in at least one of a resource request from the interfering device and a response to the interfering device in the form of at least one of a restriction and a modification.

[0015] A third aspect is a wireless communication relay device using a control device for controlling an amount of interference caused by a plurality of interfering devices performing wireless communication with an interfered device whose wireless communication should be protected, A processor unit; a memory that stores a program executed by the processor unit; The processor unit includes: A process of providing a resource request based on a message regarding the use of wireless resources issued by an interference device located in a carrier network to a control device located in a public network; providing a response based on a message issued by the control device to the interfering device that issued the resource request; A process of acquiring registration information regarding a part or all of a frequency channel used, a location, an antenna gain, and an acceptable amount of interference of the interfered device; obtaining information regarding the location, transmission power, antenna gain, and some or all of the available frequency channels of the interfering device; an increase amount estimation process for estimating whether or not a total amount of interference occurring in each of the operating frequency channels of the interfered device increases or the amount of increase when the interfering device transmits in each of the frequency channels with the transmission power; It is desirable to execute a reflection process for reflecting the estimated result of the increase amount in at least one of a resource request from the interfering device and a response to the interfering device in the form of at least one of a restriction and a correction.

[0016] A fourth aspect is a program for controlling interference in wireless communication for implementing the relay device of the third aspect, The processor unit, A process of providing a resource request based on a message regarding the use of wireless resources issued by an interference device located in a carrier network to a control device located in a public network; providing a response based on a message issued by the control device to the interfering device that issued the resource request; A process of acquiring registration information regarding a part or all of a frequency channel used, a location, an antenna gain, and an acceptable amount of interference of the interfered device; obtaining information regarding the location, transmission power, antenna gain, and some or all of the available frequency channels of the interfering device; an increase amount estimation process for estimating whether or not a total amount of interference occurring in each of the operating frequency channels of the interfered device increases or the amount of increase when the interfering device transmits in each of the frequency channels with the transmission power; It is desirable to include a program that executes a reflection process that reflects the estimated increase amount in at least one of a resource request from the interfering device and a response to the interfering device in the form of at least one of a restriction and a modification. Effect of the Invention

[0017] According to the first to fourth aspects, the increase in the total amount of interference can be reflected in at least one of the resource request and the response. This allows the interfering device to prioritize requests for frequency channels that are less likely to cause interference to the communication of the interfered device, suppressing unnecessary requests and providing good communication quality without causing a large amount of interference. [Brief description of the drawings]

[0018] [Figure 1] FIG. 2 is a diagram for explaining an overview of an interference control system using CBRS, which is a comparative example of the system according to the first embodiment of the present disclosure. [Diagram 2] FIG. 1 is a diagram for explaining an overview of an interference control system according to a first embodiment of the present disclosure. [Diagram 3] 3 is a diagram for explaining the configuration of an interfering device arranged in the carrier network in FIG. 2.

[0023] FIG. [Figure 4] 3 is a diagram for explaining the configuration of a relay device shown in FIG. 2; [Diagram 5] FIG. 2 is a diagram for explaining features of the interference control system according to the first embodiment of the present disclosure. [Figure 6] FIG. 2 is a diagram illustrating an example of an arrangement of an interfered device and an interfering device assumed in the first embodiment of the present disclosure. [Figure 7] FIG. 4 is a diagram showing an example of an estimation result of an amount of interference that one interfering device causes to an interfered device in the first embodiment of the present disclosure. [Figure 8] 1 is a flowchart illustrating a flow of processing executed by a relay device to estimate an amount of interference caused by an interfering device to an interfered device in the first embodiment of the present disclosure. [Figure 9] FIG. 11 is a diagram for explaining features of an interference control system according to a second embodiment of the present disclosure. [Figure 10] FIG. 11 is a diagram illustrating an example of an arrangement of an interfered device and an interfering device assumed in a second embodiment of the present disclosure. [Figure 11] FIG. 11 is a diagram illustrating an example of a resource remaining amount table estimated in the second embodiment of the present disclosure. [Figure 12]11 is a flowchart illustrating a flow of a process executed by a relay device in a second embodiment of the present disclosure. [Figure 13] FIG. 11 is a diagram for explaining features of an interference control system according to a third embodiment of the present disclosure. [Figure 14] 13 is a flowchart illustrating a flow of a process executed by a relay device in a third embodiment of the present disclosure. [Figure 15] 13 is a flowchart for explaining a flow of a process executed by an interfering device to update a resource remaining amount table in a third embodiment of the present disclosure. [Figure 16] 13 is a flowchart for explaining a flow of processing executed by an interfering device to transmit a resource request based on a resource remaining amount table in a third embodiment of the present disclosure. [Figure 17] FIG. 17 is a diagram for explaining an outline of a resource remaining amount table referred to in the routine shown in FIG. 16. [Figure 18] FIG. 13 is a diagram for explaining features of an interference control system according to a fourth embodiment of the present disclosure. [Figure 19] 13 is a flowchart illustrating a flow of a process executed by a relay device in a fourth embodiment of the present disclosure. [Figure 20] FIG. 13 is a diagram for explaining features of an interference control system according to a fifth embodiment of the present disclosure. [Figure 21] 13 is a flowchart illustrating a flow of processing executed by a relay device in a fifth embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Embodiment 1 [Comparative Example of the First Embodiment] 1 is a diagram for explaining an overview of an interference control system using CBRS. Hereinafter, the configuration and operation of this system will be described as a comparative example of the interference control system according to the first embodiment of the present disclosure.

[0020] The system shown in FIG. 1 includes an interfered device 10. The interfered device 10 is a wireless device whose communication quality needs to be protected, such as a radar system used by the government. The system shown in FIG. 1 also includes a plurality of interferer devices 12-1 to 12-5. Here, five interferer devices are illustrated. Hereinafter, when there is no need to distinguish between the interferer devices 12-1 to 12-5, they will be referred to as the interferer device 12 using the reference symbol 12. The interferer device 12 is a wireless device that is expected to be used, for example, in the private sector. The interfered device 10 and the interferer device 12 can use overlapping frequency bands.

[0021] A wireless signal emitted from the interfering device 12 may interfere with a wireless signal transmitted and received by the interfered device 10. In Fig. 1, for example, the amount of interference caused by the interfering device 12-1 is represented as "I1" and the amount of interference caused by the interfering device 12-2 is represented as [I2]. Also, the total amount of interference, which is the sum of the interference caused by each of the interfering devices 12, is represented as "I". In order to protect the communication of the interfered device 10, it is necessary to suppress the total amount of interference I in the frequency channel used by the interfered device 10 to an allowable value or less.

[0022] In the system shown in Fig. 1, some of the interfering devices 12-1 and 12-2 are directly connected to the CBRS control device 14. The remaining interfering devices 12-3 to 12-5 are connected to the control device 14 via a relay device 16. The relay device 16 can relay resource requests and responses between each of the multiple interfering devices 12-3 to 12-5 and the control device 14.

[0023] In a system using CBRS, each of the interfered device 10 and the interfering device 12 pre-registers the device ID, location information, etc., in the control device 14 before starting communication. As an example of such, Fig. 1 shows a registration message 18 transmitted from the interfering device 12-5 to the control device 14. Specifically, the registration message 18 includes the following information: 1.Device ID=CBSD5 2.Latitude and longitude of the device installation location 3. Information indicating whether the device is installed indoors or outdoors 4. Antenna gain of the device

[0024] After the above-mentioned advance registration, each of the interfering devices 12 requests the control device 14 for the communication resources it wishes to use when starting communication. Fig. 1 shows a state in which a resource request 20 including ID=CBSD5 is issued from the interfering device 12-5 to the control device 14. Specifically, the resource request 20 includes the following information: 1. The frequency channel you want to use for communication 2. The transmission power you want to use to transmit the signal

[0025] A database update unit 22 is formed inside the control device 14. The database update unit 22 updates information related to frequency usage status and the like based on information obtained by advance registration, information obtained by resource application, and further information generated in response to the resource application. Specifically, the database generated by the database update unit 22 stores the following information for each of the interfering device 12 and the interfered device 10.

[0026] <Interfering device 12> (CBSD1~CBSD5) 1. Location (latitude, longitude, indoor / outdoor) 2. Available and in-use frequency channels 3. Default and active transmit power 4.Antenna Gain <Interfered device 10> 1. Location (latitude, longitude) 2.Antenna Gain 3. Frequency channel to be used 4. Allowable interference amount

[0027] A total interference amount estimating unit 24 is formed inside the control device 14. The total interference amount estimating unit 24 estimates the total interference amount I received by the interfered device 10. Specifically, first, the interference amounts I1 to I5 caused by each of the interfering devices 12 are calculated for each frequency channel used by the interfered device 10. For example, the interference amount I1 caused by the interfering device 12-1 can be calculated by a known method as a function of the position of the CBSD1, the transmission power of the CBSD1, and the antenna gain of the CBSD1, and the position of the interfered device 10 and the antenna gain of the interfered device 10. The same applies to the interference amounts I2 to I5 of the other interfered devices 12. The sum of the interference amounts I1 to I5 estimated or calculated in this way is calculated for each frequency channel, and the total interference amount I in each channel is calculated.

[0028] The control device 14 further includes an admissibility determination / response unit 26. The admissibility determination / response unit 26 determines whether the total interference amount I estimated in response to a resource request issued by any of the interfering devices 12 is equal to or less than the allowable interference value for the interfered device 10. If the relationship "total interference amount I≦allowable value" holds, it can be determined that excessive interference will not occur in the interfered device 10 even if the resource request is accepted. In this case, the admissibility determination / response unit 26 generates an OK response to the resource request. On the other hand, if the relationship "total interference amount>allowable value" holds, it can be determined that unacceptable interference will occur in the interfered device 10 if the resource request is accepted. In this case, the admissibility determination / response unit 26 generates an NG response to the resource request.

[0029] The response generated by the yes / no decision / response unit 26 is sent to the interfering device 12 directly or via the relay device 16. Fig. 1 shows a state in which a response 28 is sent from the control device 14 to the interfering device 12-5 via the relay device 16. As shown in the figure, this response includes information of OK or NG along with ID=CBSD5.

[0030] When the interfering device 12 receives an OK response to the resource request, it starts communication using the requested frequency and transmission power. On the other hand, when the interfering device 12 receives an NG response to the resource request, it changes the requested resource and makes a resource request again. According to the above process, it is possible to continue to appropriately protect the communication of the interfered device 10 while allowing efficient communication for many interfering devices 12.

[0031] [Configuration of the first embodiment] Figure 2 shows a configuration of an interference control system according to a first embodiment of the present disclosure. In the interference control system shown in Figure 2, an optical access service provided by a specific carrier is incorporated into the CBRS configuration shown in Figure 1. In Figure 2, elements that are the same as those shown in Figure 1 are denoted by the same reference numerals, and descriptions thereof will be omitted or simplified.

[0032] The system shown in Fig. 2 includes a plurality of interfering devices 30-1 to 30-3, together with the interfering devices 12-1 and 12-2. The interfering devices 12-1 and 12-2 are arranged in a public network (NW) 36 together with the control device 14. Hereinafter, when it is not necessary to distinguish between the interfering devices 12-1 and 12-2, they will be referred to as "interfering devices 12".

[0033] The interfering devices 30-1 to 30-3 are wireless devices managed by subscribers of an optical access service provided by a telecommunications carrier. Hereinafter, when there is no need to distinguish between the interfering devices 30-1 to 30-3, they will be referred to as "interfering devices 30" using the reference symbol 30. The interfering device 30 is disposed in a network managed by the telecommunications carrier (hereinafter referred to as "carrier network 32"). Incidentally, the interfering device 30 is connected to the carrier network 32 via a subscriber network managed by a subscriber, but here, they will be referred to as "carrier network 32" without distinguishing between the two.

[0034] A relay device 34 is further disposed in the carrier network 32. The relay device 34 is an element constituting a main part of the interference control system of the present embodiment, and has a function of relaying resource requests and responses between the interfering device 30 and the control device 14.

[0035] Fig. 3 is a block diagram for explaining the configuration of the interfering device 30 shown in Fig. 2. As shown in Fig. 3, the interfering device 30 includes a control unit 40 and an information storage unit 42. The control unit 40 includes a processor unit (CPU). The information storage unit 42 includes a memory, and the memory stores a program to be executed by the CPU. The function of the control unit 40 is realized by the CPU of the control unit 40 proceeding with processing according to the above program. The information storage unit 42 further stores resource information related to the ID of the device, location information, and frequencies used for communication, etc.

[0036] The interfering device 30 includes a wireless interface unit 44. The wireless interface unit 44 can establish wireless communication with an external wireless device via an antenna 46. The wireless interface unit 44 can also acquire GPS information of the device via the antenna 46. The interfering device 30 further includes a network interface unit 48. The network interface unit 48 can transmit and receive messages to and from the relay device 34 via the carrier NW 32.

[0037] FIG. 4 is a block diagram for explaining the configuration of the relay device 34 shown in FIG. 2. As shown in FIG. 4, the relay device 34 includes a control unit 50 and an information storage unit 52. The control unit 50 includes a processor unit (CPU). The information storage unit 52 includes a memory, and the memory stores a program to be executed by the CPU. The function of the control unit 50 is realized by the CPU of the control unit 50 proceeding with processing according to the above program. This program can be recorded on a recording medium and provided to the relay device 34, and can also be provided to the relay device 34 via a network. The information storage unit 52 further stores information such as the contents of messages to be relayed and a "resource remaining amount table" indicating the usage status of frequencies. The resource remaining amount table will be described in detail later.

[0038] The relay device 34 includes a network interface unit 54. The network interface unit 54 can transmit and receive messages to and from each of the interfering devices 30 via the carrier NW 32, and can also transmit and receive messages to and from the control device 14 via the public NW 36.

[0039] The relay device 34 further includes a subscriber database (DB) 56. In the subscriber DB 56, information such as IDs and addresses of the subscribers who manage the respective interfering devices 30 is stored.

[0040] [Features of the first embodiment] Fig. 5 is a diagram for explaining features of the interference control system according to the first embodiment of the present disclosure. In Fig. 5, elements that are the same as those shown in Fig. 2 above are given the same reference numerals, and descriptions thereof will be omitted or simplified.

[0041] The interference control system shown in Fig. 5 includes two interfered devices 10. In the following, when there are multiple interfered devices and it is necessary to distinguish between them, suffixes such as 10-1, 10-2 will be added. The interfered devices 10-1 and 10-2 may be the same system or different systems. Furthermore, the frequency channels used by the interfered devices 10-1 and 10-2 may be the same, overlap, or different.

[0042] Specifically, FIG. 5 shows that the following processes are executed in chronological order in the interference control system of this embodiment. (1): The control device 14 provides the relay device 34 with information about the interfered device. (2) The relay device 34 estimates the increase in the total interference amount I based on the acquired information. (3) The relay device 34 further reflects the estimation result regarding the increase in the total amount of interference I in the resource requests and responses exchanged between the interfering device 30 and the control device 14.

[0043] In the above process (1), the following information is provided from the control device 14 to the relay device 34 as interfered device information. 1. Location (latitude and longitude) 2. Antenna pattern (including antenna gain) 3. Frequency channel to be used 4. Allowable interference amount

[0044] In addition to the interfered device information described above, the relay device 34 acquires the following information from the interfered device 12 under its control. Note that this information may be acquired directly from the interfered device 12 or via the control device 14. 1. Location (latitude, longitude, indoor / outdoor) 2. Frequency channel to be used 3. Specified transmission power 4.Antenna Gain

[0045] In the above process (2), when each interfering device 30 emits a specified transmission power in each available frequency channel, the increase in the total amount of interference I occurring in each interfered device 10 is estimated.

[0046] In the above process (3), the "resource remaining amount table" is updated based on the increase in the estimated total interference amount I. Furthermore, a process is performed to reflect the contents of the updated resource remaining table in the resource request or response.

[0047] Fig. 6 shows an example of the arrangement of the interfered device 10 and the interfering device 30 assumed in this embodiment. Fig. 6 includes three interfered devices 10-1 to 10-3 and four interfering devices 30-1 to 30-4. The fourth interfering device 30-4 is assumed to be newly installed at the illustrated position under a situation where the three interfering devices 30-1 to 30-3 already exist. Below, a procedure for estimating the resource remaining amount table will be described using this arrangement as an example.

[0048] The top three rows of Fig. 7 show the estimated increase in the total amount of interference I occurring in each of the interfered devices 10-1 to 10-3 due to the installation of the interfering device 30-4. The height of each of the horizontal lines 62-1 to 62-3 of the "tolerable amount of interference" shown in each row indicates the allowable value of interference, and the width of each line indicates the frequency band used by each of the interfered devices 10-1 to 10-3. For example, the horizontal line 62-1 shown in the top row indicates that the interfered device 10-1 uses the three frequency channels (hereinafter referred to as "F1 to F3") on the left side of the figure.

[0049] The relay device 34 identifies the frequency channel used by the interfered device 10-1 based on the interfered device information acquired from the control device 14. The relay device 34 also estimates the amount of interference "I4" that the interfered device 10-1 will experience when the interfered device 30-4 uses a default transmission power on the frequency channel used by the interfered device 10-1 and the interfered device 30-4 based on the antenna characteristics and positions of the interfered device 10-1 and the interfered device 30-4. The relay device 34 also estimates "I4" for the interfered devices 10-2 and 10-3 using a similar procedure.

[0050] Each block of "I4" shown in the top three rows of Fig. 7 indicates the increase in the amount of interference estimated in this way. The arrows drawn between each block of "I4" and the horizontal lines 62-1 to 62-3 of "tolerable interference amount" indicate the margin of the amount of interference remaining in each of the interfered devices 10-1 to 10-3 when the interfering device 30-4 uses a specified transmission power in each frequency channel. Hereinafter, this margin is referred to as "resource remaining amount".

[0051] The relay device 34 can estimate the remaining resource amount for each of the interfered devices 10-1 to 10-3 for each operating frequency channel by subtracting the estimated interference amount "I4" from the known allowable interference amount. The bottom part of Fig. 7 shows an example of a "resource remaining amount table" generated based on these estimates.

[0052] For example, the two frequency channels (F1, F2) on the far left side of the figure are used only by the interfered device 10-1. Therefore, these frequency channels need only be used to protect the interfered device 10-1. For this reason, the estimated value of the remaining resource in the interfered device 10-1 can be regarded as the remaining resource in the entire system.

[0053] On the other hand, the third frequency channel (F3) from the left in Fig. 7 is used by two interfered devices 10-1 and 10-2. In this case, it is necessary to make the total interference amount I in both of them equal to or less than the allowable value. For this reason, in frequency channel F3, it is necessary to use the smaller of the remaining resource amount estimated in interfered device 10-1 and the remaining resource amount estimated in interfered device 10-2 as the remaining resource amount of the entire system. In other words, for frequency channels used by multiple interfered devices 10, it is necessary to use the smallest of the remaining resource amounts estimated in each of the interfered devices 10 as the remaining resource amount of the entire system.

[0054] In the example shown in Fig. 7, the frequency channel shown on the far right (hereinafter, "F7") is not used by any of the interfered devices 10. In this case, the interferer device 30 can use the frequency channel F7 without any restrictions for the purpose of protecting the interfered device 10. Therefore, the frequency channel F7 can be treated as an "unrestricted" channel.

[0055] The resource remaining amount table at the bottom of FIG. 7 was generated from the above viewpoint when the interfering device 30-4 was newly installed. By referring to such a resource remaining amount table, it is possible to generate a resource remaining amount table assuming the most severe condition, that is, all frequency channels are used with the specified transmission power, when the interfering device 30-4 is newly installed. By referring to such a resource remaining amount table, it is possible to know which frequency channel is likely to be congested and which channel is unlikely to be mixed under the most severe condition. Therefore, if a channel that is unlikely to be congested is preferentially used in subsequent communications, it is possible to appropriately suppress the amount of interference, avoid unnecessary rejection of resource applications, and obtain good communication quality.

[0056] In the above example, the increase in the total interference amount I caused by the interfering device 30-4 is estimated on the assumption that the interfering device 30-4 is newly used or updated, but the subject of the estimation is not limited to this. A similar estimation may be performed when each of the existing interfering devices 30-1 to 30-3 uses each frequency channel.

[0057] Fig. 8 is a flowchart for explaining the flow of the process executed by the relay device 34 to generate the above-mentioned resource remaining amount table. As shown in Fig. 8, the relay device 34 in the steady state first determines whether or not the above-mentioned interfered device information has been received from the control device 14 (step 100).

[0058] The above process is repeated until reception of the interfered device information is determined. Then, if reception of the information is confirmed, the frequency channel used by the interfered device 10 is identified (step 102). For example, according to the example shown in Fig. 7, the frequency channel used by each of the interfered devices 10-1 to 10-3 is identified by the process of this step.

[0059] After the above process is completed, the increase in the total interference I occurring in each of the operating frequency channels for each interfered device 10 is estimated (step 104). For example, according to the example shown in Fig. 6 and Fig. 7, the increase in the total interference I occurring in each operating frequency channel of each interfered device 10 due to the new start of use or update of the interfering device 30-4 is estimated. In this step, further, a resource remaining amount table as shown in the lower part of Fig. 7 is generated based on the above estimation result.

[0060] When the above processing is completed, the relay device 34 ends this routine and temporarily returns to a steady state.

[0061] As described with reference to Fig. 5, the relay device 34 reflects the contents of the resource remaining amount table in the resource request transmitted to the control device 14 and the response returned to the interfering device 12. Specifically, the contents of the resource remaining amount table are reflected in the resource request or response so that frequency channels with a large amount of remaining resources are used in preference to channels with a small amount of remaining resources. As a result, in the example shown in Fig. 7, for example, frequency channels designated as "unconstrained" are used with the first priority for new communication.

[0062] Therefore, according to the wireless communication system of the present embodiment, in an environment where a plurality of interfered devices 10 and a plurality of interfering devices 30 exist, each of the interfered devices 10 can be effectively protected. In addition, it is possible to avoid repeated useless resource requests and rejections between the plurality of interfering devices 30 and the control device 14. Furthermore, it is possible to realize good communication quality in each of the interfering devices 30.

[0063] Embodiment 2 Next, a second embodiment of the present disclosure will be described with reference to Figures 9 to 12 in addition to Figures 2 to 4 and 8. The interference control system of the present embodiment can be realized by the hardware configuration shown in Figures 2 to 4, similar to the first embodiment.

[0064] [Features of the second embodiment] Fig. 9 is a diagram for explaining features of the second embodiment of the present disclosure. In Fig. 9, the same elements as those shown in Fig. 5 above are denoted by the same reference numerals, and the description thereof will be omitted or simplified.

[0065] FIG. 9 shows that the following processes are executed in chronological order in the interference control system of this embodiment. (1): The control device 14 provides the relay device 34 with information about the interfered device. (2) The interfering device 30 issues a resource request to the control device 14 . (3): A response is sent from the control device 14 to the interfering device 30 . (4) The relay device 34 accumulates resource requests and responses, and grasps the availability of frequency channels based on the contents of the requests and responses. (5) The relay device 34 estimates the remaining resource amount based on the availability of the identified frequency channels, and generates a remaining resource amount table. (6)-(10): The relay device 34 reflects the results of the resource remaining amount table in a resource request sent to the control device 14 or in a response sent to the interfering device 30 so that the use of a frequency channel with a large amount of remaining resources is given priority.

[0066] Fig. 10 shows an example of the arrangement of the interfered device 10 and the interfering devices 12, 30 that can be used in this embodiment. The example shown in Fig. 10 is similar to the above example shown in Fig. 6 except that it includes an interfering device 12 that belongs to a public NW 36, that is, an interfering device 12 that does not belong under the control of a relay device 34. Below, using this arrangement as an example, a procedure for the relay device 34 to estimate a resource remaining amount table in this embodiment will be described.

[0067] Fig. 11 is a diagram for explaining the process in which the relay device 34 grasps the availability of frequency channels and generates a resource remaining table based on the grasped situation. In Fig. 11, the block "I1" indicates the amount of interference suffered by each of the interfered devices 10 when the interfering device 30-1 uses a specified transmission power in the corresponding frequency channel. The blocks "I2" and "I3" indicate the amount of interference caused by the interfering devices 30-2 and 30-3.

[0068] For example, when the relay device 34 receives a resource request from the interfering device 30-1 requesting the use of the frequency channel F1 and returns a response permitting the request, the relay device 34 can estimate that the interfering device 30-1 is using the channel F1. The amount of interference I1 that the interfering device 30-1 gives to each of the interfered devices 10 can be estimated by the method described in the first embodiment.

[0069] Similarly, the relay device 34 can estimate the frequency channel and the amount of interference I2, I3 that the interfering devices 30-2, 30-3 are causing to the interfered device 10. Each of the blocks "I1", "I2", and "I3" shown in Fig. 11 indicates the results of estimation using the above method based on the accumulation of resource requests and responses.

[0070] In Fig. 11, three blocks indicated by dots on the block "I2" indicate the amount of interference caused by the interfering device 12 belonging to the public NW 36. Since the interfering device 12 is not under the control of the relay device 34, the relay device 34 cannot estimate the amount of interference by the same method as "I1" to "I3". Therefore, the relay device 34 estimates the amount of interference caused by the interfering device 12 based on the history of responses from the control device 14 to the interfering devices 30 under its control.

[0071] For example, if a resource request issued from a subordinate interfering device 30 generates a total interference amount close to the allowable interference amount, but the resource request is permitted, it is estimated that the frequency channel related to the request does not generate an interference amount caused by the interfering device 12. Also, if a resource request issued from a subordinate interfering device 30 has a sufficient margin for the allowable interference amount, but receives a response that does not permit the request, it is estimated that an interference amount larger than the margin is generated by the interfering device 12. The three blocks indicated by dots in FIG. 11 show the results of estimation using this method based on the response history from the control device 14.

[0072] The "I4" block shown in Fig. 11 indicates the amount of interference caused by the newly installed interfering device 30-4, as in the case of embodiment 1. The method of estimating the amount of interference "I4" is also the same as in embodiment 1. However, in Fig. 11, dashed arrows are shown instead of the "I4" block for the channel (hereinafter referred to as "F5") located at the rightmost position of the frequency channels used by the interfered device 10-2 and for channel F5 located in the center of the frequency channels used by the interfered device 10-3.

[0073] The non-display of the "I4" block in the operating frequency channel of each interfered device 10 indicates that, in those operating frequency channels, if the interfering device 30-4 uses the specified transmission power, the total interference amount I will exceed the allowable interference amount in relation to the existing interference amount. The dashed arrows shown in those frequency channels indicate the margin of the interference amount in those channels. The relay device 34 can calculate the additional transmission power that can be allocated to the interfering device 30 based on that margin.

[0074] The bottom part of Fig. 11 shows a resource remaining amount table generated based on the availability of frequency channels grasped by the above method. As in the first embodiment (see Fig. 7), the resource remaining amount in each frequency channel is set to be the smallest of the resource remaining amounts grasped by all of the subordinate interfered devices 10. For example, for the channel where the above-mentioned "I4" block is not displayed, the margin estimated by the interfered device 10-2 is smaller than the margin estimated by the interfered device 10-3, so the latter dashed arrow is shown in the resource remaining amount table. Also, in the resource remaining amount table shown in Fig. 11, as in the first embodiment, "no constraint" is displayed for frequency channels not used by any of the interfered devices 10.

[0075] According to the above method, when the interfering device 30-4 is newly started or updated, the resource remaining amount that occurs under the most severe conditions can be reflected in the resource remaining amount table. Therefore, when a new resource is requested from any of the interfering devices 30 thereafter, the resource allocation can be determined according to the resource remaining amount table, so that the communication of the interfered device 10 can be reliably protected.

[0076] Fig. 12 is a flowchart for explaining the flow of processing executed by the relay device 34 to relay a resource request from the interfering device 30 and a response from the control device 14 between them. The relay device 34 executes the routine shown in Fig. 12 and also appropriately executes the routine shown in Fig. 8 in the same manner as in the first embodiment to estimate the increase in the total interference amount I.

[0077] As shown in FIG. 12, the relay device 34 in the steady state determines whether or not a resource request has been received from any of the subordinate interfering devices 30 (step 110).

[0078] When it is determined that a resource request has been received, the resource request is transmitted to the control device 14 (step 112). It is preferable that the resource request transmitted to the control device 14 by this process is a request for the use of a frequency channel showing the largest remaining resource amount in the remaining resource amount table.

[0079] Next, it is determined whether a response to the resource request is received from the control device 14 within a certain period of time (step 114). The response includes a content that allows or rejects the resource request. Alternatively, the response may include information on the resources that can be permitted for use, such as the amount of allowable transmission power or the allowable frequency channel.

[0080] If no response is received from the control device 14, the process returns to step 112 and the resource request is retransmitted. On the other hand, if the response is received, the process next involves determining the channel usage status in the interfered device 10 and updating the resource remaining amount table based on the determined status (step 116).

[0081] Specifically, in the above step 116, first, the contents of the current resource request and response are stored. Next, based on the stored data of the resource request and response, the total amount of interference I caused by existing wireless communication is estimated. For example, when wireless communication is being performed between the subordinate interfering devices 30-1 to 30-3 and the external interfering device 12, the total amount of interference I caused by them is estimated. As a result, in the example of FIG. 11, blocks indicated as "I1" to "13" and blocks indicated by dots are estimated.

[0082] In the above step 116, the result of the routine shown in Fig. 8 is then referred to. Specifically, the increase in the total interference amount I in each of the interfered devices 10 when the newly installed interfering device 30 uses each frequency channel is referred to. Then, the increase is superimposed on the total interference amount I estimated by the above process. In an example in which the interfering device 30-4 is newly started to be used or updated, the usage status of the frequency channels shown in the upper three rows of Fig. 11 is grasped as a result.

[0083] Finally, in step 116, the resource remaining table is updated based on the usage status of the frequency channel grasped as described above. In an example in which the interfering device 30-4 is newly started to be used or updated, the resource remaining table shown in the bottom part of FIG. 11 is generated.

[0084] After the above process is completed, the relay device 34 then returns a response to the resource request to the interfering device 30 that issued the resource request (step 118). This response gives first priority to the use of the frequency channel showing the largest remaining resource amount in the remaining resource amount table updated in the above step 116, and permits the use of a channel that fits within that remaining resource amount.

[0085] The resource remaining table obtained in step 116 is generated assuming a condition in which the newly installed interfering device 30 uses a specified transmission power in all frequency channels. In other words, the resource remaining table is generated assuming the most severe condition under the current circumstances. Then, the response returned to the interfering device 30 is in accordance with the resource remaining table as described above. Therefore, according to the wireless communication system of this embodiment, it is possible to continue to appropriately protect all of the interfered devices 10.

[0086] According to the above process, the interfering device 30 that has issued the resource request is given permission corresponding to the largest resource indicated in the resource remaining amount table. Therefore, according to the wireless communication system of the present embodiment, it is possible to realize the maximum communication efficiency as long as the protection of the interfered device 10 can be appropriately maintained.

[0087] Embodiment 3 Next, a third embodiment of the present disclosure will be described with reference to Figs. 2 to 4, 8, and 12, as well as Figs. 13 to 17. The interference control system of this embodiment can be realized by the hardware configuration shown in Figs. 2 to 4, similar to the first embodiment. Furthermore, in this embodiment, the relay device 34 executes the above-mentioned routine shown in Fig. 8 and the routine shown in Fig. 12, similar to the second embodiment. As a result, in this embodiment as well, the relay device 34 generates a resource remaining amount table similar to the second embodiment.

[0088] [Features of the third embodiment] Fig. 13 is a diagram for specifically explaining the flow of processing executed in this embodiment to reflect the contents of the resource remaining amount table in a resource application or response. In Fig. 13, elements or processing corresponding to those shown in Fig. 9 above are given the same reference numerals and their explanations are omitted or simplified.

[0089] Specifically, FIG. 13 shows that the following processes are executed in chronological order in the interference control system of this embodiment. (1)-(5): A resource remaining amount table is generated in the same manner as in the second embodiment. (6-1): The relay device 34 notifies the subordinate interfering device 30 of information in the resource remaining amount table. (6-2): The interfering device 30 selects a frequency channel that is less likely to be congested based on the received information in the resource remaining table, and generates a resource request. (7)-(10): In response to the resource request transmitted by the interfering device 30, the interfering device 30 starts communication in accordance with the response returned by the control device 14.

[0090] 14 is a flowchart of a routine executed by the relay device 34 to realize the above process (6-1). The relay device 34 of this embodiment provides the latest resource remaining amount table at that time to the subordinate interfering device 30 every time a certain time elapses.

[0091] To realize this function, the relay device 34, in a steady state, determines whether or not a certain period of time has passed since the previous notification (step 120).

[0092] As a result, if it is determined that a certain period of time has elapsed, the relay device 34 transmits the latest resource remaining amount table to all of the subordinate interfering devices 30 (step 122). After the above processing is completed, the relay device 34 ends this routine and returns to the steady state again.

[0093] Fig. 15 is a flowchart of a routine executed by each of the interfering devices 30 to realize a part of the above (6-2). As shown in Fig. 15, the interfering device 30 in this embodiment determines whether or not it has received a notification of the resource remaining amount table from the relay device 34 in a steady state (step 130).

[0094] As a result, if reception of the resource remaining amount table is confirmed, the resource remaining amount table stored by the interfering device 30 is updated according to the contents of the received resource remaining amount table (step 132). After the above processing is completed, the interfering device 30 ends this routine and returns to the steady state.

[0095] Fig. 16 is a flowchart of a routine executed by each of the interfering devices 30 to realize the remaining part of the above (6-2) and the above processes (7) and (10). As shown in Fig. 16, the interfering device 30 in a steady state determines whether or not a trigger for a resource request has occurred (step 140). For example, when the interfering device 30 recognizes the need for new communication, it determines that a trigger for a resource request has occurred.

[0096] When it is recognized that an opportunity for resource application has occurred, the resource remaining amount table updated by the process of FIG. 15 is referenced and the frequency range and transmission power to be used are determined (step 142).

[0097] FIG. 17 shows an example of the resource remaining amount table referred to in step 142. In FIG. 17, the resource remaining amount and the update time are written for each frequency channel. In step 142, the frequency channel showing the largest resource remaining amount in the resource remaining amount table is preferentially set as the applied channel. Specifically, if there is a channel with "no constraint", that channel is set as the applied channel. If there is no channel with "no constraint", the channel with the largest resource remaining amount becomes the applied channel. In addition, since data with an old update time is less credible, the time is also taken into consideration when determining the applied channel. For example, if there are multiple channels with the same resource remaining amount, the channel with the most recent update time becomes the applied channel.

[0098] Furthermore, in the above step 142, the transmission power to be used is determined so as not to exceed the resource remaining amount shown in the resource remaining amount table. For example, when the frequency channel 1 shown in Fig. 17 is determined as the requested channel, the transmission power is determined to be a [dbm] or less.

[0099] When the above process is completed, the interfering device 30 transmits a resource request with the determined contents (step 144). After that, this request reaches the control device 14 via the relay device 34. In this embodiment, the resource request is set so as to satisfy the limit of the resource remaining amount table. Therefore, the control device 14 will, in principle, make a decision to permit the request.

[0100] The response sent by the control device 14 to the resource request is returned to the interfering device 30 that issued the resource request via the relay device 34. After issuing a resource request, the interfering device 30 repeatedly determines whether or not a response has been received from the relay device 34 (step 146).

[0101] If the response is received, the interfering device 30 modifies its own wireless resources in accordance with the content of the received response (step 148). After that, the interfering device 30 returns to the steady state, and the current routine is terminated.

[0102] According to the above process, the interfering device 30 can be made to start new communication within a range where each of the interfered devices 10 can be appropriately protected. In addition, it is possible to effectively avoid unnecessary exchange of application and rejection between the interfering device 30 and the control device 14. Furthermore, since the channel with the largest remaining resource is used preferentially, it is possible to make the most effective use of the resources of the entire system. Therefore, according to this embodiment, it is possible to efficiently improve the communication quality of the interfering device 30 while protecting the interfered device 10.

[0103] Embodiment 4 Next, a fourth embodiment of the present disclosure will be described with reference to Figs. 2 to 4, 8 and 12, as well as Figs. 18 and 19. The interference control system of this embodiment can be realized by the hardware configuration shown in Figs. 2 to 4, similar to the first embodiment. Furthermore, in this embodiment, the relay device 34 executes the above-mentioned routine shown in Fig. 8 and the routine shown in Fig. 12, similar to the second embodiment. As a result, in this embodiment as well, the relay device 34 generates a resource remaining amount table similar to the second embodiment.

[0104] [Features of the fourth embodiment] Fig. 18 is a diagram for specifically explaining the flow of processing executed in this embodiment to reflect the contents of the resource remaining amount table in a resource application or response. In Fig. 18, elements or processing corresponding to those shown in Fig. 9 above are given the same reference numerals and their explanations are omitted or simplified.

[0105] Specifically, FIG. 18 shows that the following processes are executed in chronological order in the interference control system of this embodiment. (1)-(5): A resource remaining amount table is generated in the same manner as in the second embodiment. (7): The interfering device 30 sends a resource request to the relay device 34 . (6-3): The relay device 34 modifies the received resource request so that it complies with the constraints of the resource remaining amount table. (6-4): The relay device 34 transmits the revised resource request to the control device 14. (9)-(10): In response to the resource request sent by the control device 14, the interfering device 30 starts communication.

[0106] Fig. 19 is a flowchart of a routine executed by relay device 34 to realize the above processes (6-3) and (6-4) and part of the above process (10). In Fig. 19, steps that are the same as those shown in Fig. 12 are denoted by the same reference numerals and their explanations are omitted or simplified.

[0107] As shown in Fig. 19, when the relay device 34 of this embodiment acknowledges receipt of a resource request in step 100, it determines whether the resources requested in the request can be allocated (step 150). The process of this step is performed based on the latest resource remaining amount table updated in step 116 shown in Fig. 12. As a result, if it is determined that the content of the currently received resource request is allocable in light of the resource remaining amount table, the process from step 112 onwards is executed as is.

[0108] On the other hand, if it is determined in step 150 that the content of the resource request is not allocable in light of the resource remaining table, the content of the request is modified (step 152). Specifically, the frequency channel requested by the resource request is changed to the channel with the largest resource remaining amount in the resource remaining table. Furthermore, it is determined whether the transmission power requested by the resource request fits within the resource remaining amount of the changed channel. If the determination is negative, the transmission power related to the request is reduced so that it fits within the resource remaining amount of the changed channel.

[0109] Thereafter, by the processing of steps 112 to 118, the resource request approved by the relay device 34 is transmitted to the control device 14, and a response to the resource request is returned to the interfering device 30. In this case, the interfering device 30 receives a response that meets the constraints of the resource remaining amount table. Therefore, in this embodiment as well, it is possible to achieve the three points of protecting the interfered device 10, avoiding unnecessary requests and responses, and efficiently utilizing resources, in the same way as in the third embodiment.

[0110] Embodiment 5. Next, a fifth embodiment of the present disclosure will be described with reference to Figs. 20 and 21 in addition to Figs. 2 to 4, 8 and 12. The interference control system of this embodiment can be realized by the hardware configuration shown in Figs. 2 to 4, similar to the first embodiment. Furthermore, in this embodiment, the relay device 34 executes the above-mentioned routine shown in Fig. 8 and the routine shown in Fig. 12, similar to the second embodiment. As a result, in this embodiment as well, the relay device 34 generates a resource remaining amount table similar to the second embodiment.

[0111] [Features of the fifth embodiment] Fig. 20 is a diagram for specifically explaining the flow of processing executed in this embodiment to reflect the contents of the resource remaining amount table in a resource application or response. In Fig. 20, elements or processing corresponding to those shown in Fig. 9 above are given the same reference numerals and their explanations are omitted or simplified.

[0112] Specifically, FIG. 20 shows that the following processes are executed in chronological order in the interference control system of this embodiment. (1)-(5): A resource remaining amount table is generated in the same manner as in the second embodiment. (7)-(10): The relay device 34 transmits a resource request issued by the interfering device 30 to the control device 14, and the control device 14 returns a response to the resource request to the relay device 14. (6-5): The relay device 34 modifies the received response so that it complies with the constraints of the resource remaining amount table. (6-6): The relay device 34 transmits the modified response to the interfering device 30.

[0113] Fig. 21 is a flowchart of a routine executed by the relay device 34 to realize the above process (8) and the above processes (6-5) and (6-6). In Fig. 21, steps that are the same as those shown in Fig. 12 are denoted by the same reference numerals, and their explanations are omitted or simplified.

[0114] 21, when the relay device 34 of this embodiment receives a response in step 114 and finishes updating the resource remaining amount table in step 116, it determines whether the conditions of the response are acceptable in light of the resource remaining amount table (step 160). As a result, if the conditions of the currently received response are acceptable, the process proceeds to step 118 and subsequent steps.

[0115] On the other hand, if it is determined in step 160 that the content of the received response is not acceptable in light of the resource remaining table, the content of the response is modified (step 162). Specifically, the frequency channel included in the response is changed to the channel with the largest resource remaining in the resource remaining table. Furthermore, it is determined whether the transmission power allowed by the response fits within the resource remaining of the changed channel. If the determination is negative, the transmission power included in the response is reduced so that it fits within the resource remaining of the changed channel.

[0116] Thereafter, the response approved by the relay device 34 is provided to the interfering device 30 by the process of step 118. In this case, the interfering device 30 receives a response that meets the constraints of the resource remaining amount table. Therefore, in this embodiment, too, it is possible to achieve the three points of protecting the interfered device 10, avoiding unnecessary requests and responses, and efficiently utilizing resources, in the same way as in the third embodiment. [Explanation of symbols]

[0117] 10, 10-1, 10-2, 10-3 Interfered device 12, 12-1 to 12-5, 30, 30-1 to 30-4 Interference device 14 Control device 32 Carrier Network (Carrier NW) 34 Relay Device 36 Public Network (Public NW) 50 Control section 52 Information storage section

Claims

1. A wireless communication interference control system including a control device for controlling an amount of interference caused by a plurality of interfering devices performing wireless communication to an interfered device whose wireless communication should be protected, A relay device disposed between the interfering device and the control device includes a processor unit and a memory storing a program executed by the processor unit; The processor unit includes: A process of providing a resource request based on a message regarding the use of wireless resources issued by an interference device located in a carrier network to a control device located in a public network; providing a response based on a message issued by the control device to the interfering device that issued the resource request; A process of acquiring registration information regarding a part or all of a frequency channel used, a location, an antenna gain, and an acceptable amount of interference of the interfered device; obtaining information regarding the location, transmission power, antenna gain, and some or all of the available frequency channels of the interfering device; an increase amount estimation process for estimating whether or not a total amount of interference occurring in each of the operating frequency channels of the interfered device increases or the amount of increase when the interfering device transmits in each of the frequency channels with the transmission power; A reflection process in which the estimated result of the increase is reflected in at least one of a resource request from the interfering device and a response to the interfering device in the form of at least one of a restriction and a modification that prioritizes a request for a frequency channel that is less likely to cause interference to communication of the interfered device; A wireless communication interference control system that performs the above steps.

2. The processor unit includes: A process of storing the contents of messages included in the resource request issued by the interfering device and the response issued by the control device in the memory; A process of estimating a frequency usage status of each of the plurality of interfering devices based on the contents of the stored messages; and estimating a frequency channel availability state reflecting a result of estimating a total amount of interference suffered by each of the interfered devices under the frequency usage state for each frequency channel, the interfered device being interfered with by at least one of the interferer devices under the control of the relay device; The increase amount estimation process includes a process of estimating the increase amount for an interfering device that is newly started to be used or updated, The reflection process is A process of generating a resource remaining amount table by superimposing the estimated increase amount on the frequency channel availability; a channel selection process for selecting a priority frequency channel to be used with priority based on the resource remaining table; a channel reflection process of reflecting the preferred frequency channel in at least one of the resource request and the response; 2. The wireless communication interference control system according to claim 1, comprising:

3. the channel selection process includes a process of estimating a remaining resource amount in the priority frequency channel based on the remaining resource amount table; The channel reflection process includes a process of providing information on the preferred frequency channel and the remaining amount of resources to the interfering device under the control of the relay device, and causing the interfering device to generate a resource request that matches the preferred frequency channel and the remaining amount of resources. The wireless communication interference control system of claim 2.

4. the channel selection process includes a process of estimating a remaining resource amount in the priority frequency channel based on the remaining resource amount table; The channel reflection process includes a process of modifying a resource request received from the interfering device under the control of the relay device into a resource request that conforms to the priority frequency channel and the remaining resource amount, and transmitting the resource request to the control device. The wireless communication interference control system according to claim 2.

5. the channel selection process includes a process of estimating a remaining resource amount in the priority frequency channel based on the remaining resource amount table; The channel reflection process includes a process of modifying a response received from the control device to a response that conforms to the priority frequency channel and the remaining resource amount, and transmitting the response to the interfering device under the control of the relay device. The wireless communication interference control system according to claim 2.

6. A wireless communication interference control method using a control device in which a plurality of interfering devices performing wireless communication control an amount of interference caused to an interfered device whose wireless communication should be protected, comprising: A relay device disposed between the interfering device and the control device, providing a resource request based on a message regarding the use of radio resources issued by an interfering device located in the operator network to a control device located in the public network; providing a response to the resource request based on a message issued by the control device to the interfering device that issued the resource request; acquiring registration information regarding some or all of a frequency channel used, a location, an antenna gain, and an amount of acceptable interference of the interfered device; obtaining information regarding the location, transmit power, antenna gain, and some or all of the available frequency channels of the interfering device; A step of estimating whether or not a total amount of interference occurring in each of the operating frequency channels of the interfered device increases or the amount of increase when the interfering device transmits in each of the frequency channels with the transmission power; A step of reflecting the estimated result of the increase in at least one of a resource request from the interfering device and a response to the interfering device in the form of at least one of a restriction and a modification that prioritizes a request for a frequency channel that is less likely to cause interference to communication of the interfered device; The interference control method for wireless communication is as follows.

7. A wireless communication relay device using a control device for controlling an amount of interference caused to an interfered device whose wireless communication is to be protected, the relay device comprising: A processor unit; a memory that stores a program executed by the processor unit; The processor unit includes: A process of providing a resource request based on a message regarding the use of wireless resources issued by an interference device located in a carrier network to a control device located in a public network; providing a response based on a message issued by the control device to the interfering device that issued the resource request; A process of acquiring registration information regarding a part or all of a frequency channel used, a location, an antenna gain, and an acceptable amount of interference of the interfered device; obtaining information regarding the location, transmission power, antenna gain, and some or all of the available frequency channels of the interfering device; an increase amount estimation process for estimating whether or not a total amount of interference occurring in each of the operating frequency channels of the interfered device increases or the amount of increase when the interfering device transmits in each of the frequency channels with the transmission power; A reflection process in which the estimated result of the increase is reflected in at least one of a resource request from the interfering device and a response to the interfering device in the form of at least one of a restriction and a modification that prioritizes a request for a frequency channel that is less likely to cause interference to communication of the interfered device; A wireless communication relay device that executes the above.

8. A program for controlling interference in wireless communication for implementing the relay device according to claim 7, The processor unit, A process of providing a resource request based on a message regarding the use of wireless resources issued by an interference device located in a carrier network to a control device located in a public network; providing a response based on a message issued by the control device to the interfering device that issued the resource request; A process of acquiring registration information regarding a part or all of a frequency channel used, a location, an antenna gain, and an acceptable amount of interference of the interfered device; obtaining information regarding the location, transmission power, antenna gain, and some or all of the available frequency channels of the interfering device; an increase amount estimation process for estimating whether or not a total amount of interference occurring in each of the operating frequency channels of the interfered device increases or the amount of increase when the interfering device transmits in each of the frequency channels with the transmission power; A reflection process in which the estimated result of the increase is reflected in at least one of a resource request from the interfering device and a response to the interfering device in the form of at least one of a restriction and a modification that prioritizes a request for a frequency channel that is less likely to cause interference to communication of the interfered device; A program for controlling interference in wireless communication, the program including a program for executing the above.

Images