Management device, resource management method, and program

Abstract

To provide a management device, a method, and a program for enabling an improvement in convenience in using a sharable frequency resource.SOLUTION: In a radio communication system, a management device acquires use condition information related to a use condition for a frequency resource used by a first radio communication network, receives a use request including desired condition information related to a condition for desiring the use of the frequency resource by a second radio communication network, when assuming that a radio signal is sent out by the second radio communication network according to the desired condition information based on the use condition information and the desired condition information, estimates the influence on radio communication of the first radio communication network, determines whether to permit the use by the second radio communication network based on a result of estimation made by estimation means, and when determining not to permit the use of the frequency resource corresponding to the use request, notifies alternative condition information related to the use condition for the available frequency resource.SELECTED DRAWING: Figure 5

Description

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[0001] The present invention relates to a management device for shared frequency resources, a resource management method, and a program. [Background Art]

[0002] In recent years, institutionalization has been promoted for operators other than carriers to construct and operate cellular communication networks and utilize shared frequency resources, such as local 5G (5th generation mobile communication system) and regional BWA (Broadband Wireless Access).

[0003] An operator other than the above carrier (a user who wishes to use) transmits application information regarding the frequency resources it wishes to use to the management device, and when the use is permitted, the frequency resources can be used by a base station (local network base station) installed by the user who wishes to use. In this case, due to the operation of the communication by the local network base station not being synchronized with the communication by the carrier network base station or other local network base stations, there is a possibility of interference between the communication performed by the carrier network base station and the communication performed by the local network base station.

[0004] In Patent Document 1, a technique is disclosed in which the management device acquires application information from each base station of a communication carrier, determines whether a TDD pattern can be allocated when using frequency resources of adjacent carrier frequencies, and based on the result, determines the TDD pattern of each base station. [Prior Art Documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2020-188388 [Patent Document 2] U.S. Patent Application Publication No. 2020 / 0008087​​​​​​

[0006] However, in Patent Document 1, if all of the user requests cannot be satisfied, the user cannot decide whether to stop using the frequency resource or to resubmit a request for the frequency resource under different conditions. Therefore, there was a problem in that it was inconvenient for users to use the available frequency resources.

[0007] Therefore, the present invention aims to provide a technology that makes it possible to improve the convenience when using shared frequency resources. [Means for solving the problem]

[0008] To solve the above-mentioned problems, the management device according to the present invention is A management device for managing shareable frequency resources, An acquisition means for acquiring usage condition information relating to the usage conditions of the frequency resources used by the first wireless communication network, and desired condition information relating to the conditions under which the second wireless communication network wishes to use the frequency resources, An estimation means for estimating the influence of the wireless signal on the wireless communication of the first wireless communication network, assuming that a wireless signal is transmitted in accordance with the desired conditions information in the second wireless communication network based on the usage conditions information and the desired conditions information, A determination means for determining whether or not to change the operation of the frequency resources corresponding to the usage condition information by the first wireless communication network based on the estimation result of the estimation means, If the determination means determines that the operation of the frequency resource corresponding to the usage condition information should be changed, a notification means provides alternative condition information regarding the usage conditions of the available frequency resource. Equipped with . [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a technology that makes it possible to improve the convenience when using shared frequency resources. [Brief explanation of the drawing]

[0010] [Figure 1] Block diagram showing an example configuration of the wireless communication system 1 according to the first embodiment. [Figure 2] Block diagram showing an example configuration of the control device. [Figure 3] (a) and (b) are diagrams showing example structures of shared frequency usage request messages. [Figure 4] This diagram shows information about the frequency resources currently in use, stored in the management device's database. [Figure 5]Sequence diagram showing an example of the process executed by the management device [Figure 6] Diagram showing an area where the signal strength of the radio signal transmitted from the base station of the applicant is equal to or greater than a predetermined value [Figure 7] (a) and (b) are diagrams showing alternative conditions included in the response to the usage request message [Figure 8] Block diagram showing a configuration example of the wireless communication system 2 according to the second embodiment [Figure 9] (a) and (b) are diagrams showing information on the frequency resources in use stored in the database of the management device [Figure 10] Sequence diagram showing an example of the process executed by the management device [Figure 11] Diagram showing an area where the signal strength of the radio signal transmitted in the wireless network of the applicant is equal to or greater than a predetermined value [Figure 12] Diagram showing alternative conditions included in the response to the usage request message [Figure 13] Explanatory diagram of a configuration example of the time slots of TDD in the carrier network and the local network

Mode for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the present invention according to the claims, and not all combinations of the features described in this embodiment are essential for the solution means of the present invention.

[0012] In the following embodiments, in a frequency sharing system, when it is not possible to use frequency resources based on the request from a user who wishes to use frequency resources, a method of notifying the user of parameters regarding available frequency resources will be described.

[0013] <First Embodiment> Figure 1 shows an example of the system configuration of wireless communication system 1, which is a frequency sharing system according to this embodiment. In this embodiment, users who wish to use frequency resources are described as licensees of fifth-generation mobile communications that construct local 5G networks on a spot basis, known as local 5G. In Figure 1, the number of local 5G licensees is assumed to be 2, and the number of base stations installed by each licensee is assumed to be 2.

[0014] The wireless communication system 1 includes a management device 10, base station control devices 11 and 12, and base stations 111, 112, 121, and 122.

[0015] The management device 10 manages the available frequency resources and determines whether the frequency resources are available in response to usage requests from the base station control device 11 or 12.

[0016] Base station control devices 11 and 12 are local 5G control devices capable of communicating with the management device 10 and the base station, and in this embodiment, they are operated by different licensees. In the following description, base station control device 11 is operated by local 5G licensee A, and base station control device 12 is operated by local 5G licensee B.

[0017] Base stations 111, 112, 121, and 122 are wireless base stations controlled by a base station control device. In this embodiment, base stations 111, 112, 121, and 122 are base stations that form a dedicated 5G (fifth-generation mobile communication) network established by local 5G licensees A and B. Base stations 111 and 112 are controlled by base station control device 11, and base stations 121 and 122 are controlled by base station control device 12.

[0018] Although not shown in Figure 1, a carrier network operated by a cellular network carrier is also deployed in addition to the local 5G network. In areas where wireless communication with base stations providing carrier network communication services is possible, wireless communication services are provided to terminal devices of users who have contracted with a wireless communication carrier. Similarly, in the network provided by local 5G base stations, wireless communication services are provided to terminal devices prepared for local network communication in areas where wireless communication with local network base stations is possible. In this embodiment, the carrier network is the network that should take priority, and the local network is processed to avoid or minimize interference with carrier network communications before communication.

[0019] It is conceivable that the carrier network and the local network communicate at their own independent timings. In this case, even if the carrier network and the local network communicate using orthogonal frequency division multiplexing (OFDM), which can guarantee mutual orthogonality, interference can occur because the timing of the radio frames does not match, thus failing to guarantee orthogonality. This interference can be suppressed, for example, by having the local 5G base station synchronize the transmission and reception of radio frames with the carrier network base station to match the timing of the radio frames.

[0020] Furthermore, there are multiple patterns in which mutual interference occurs. For example, interference from the carrier network to the local network can be (1) interference from base stations of the carrier network to base stations of the local network, and (2) interference from base stations of the carrier network to terminal equipment of the local network. Interference from the carrier network to the local network can also be (3) interference from terminal equipment of the carrier network to base stations of the local network, and (4) interference from terminal equipment of the carrier network to terminal equipment of the local network. Interference from the local network to the carrier network can be (5) interference from base stations of the local network to base stations of the carrier network, and (6) interference from base stations of the local network to terminal equipment of the carrier network. Interference from the local network to the carrier network can also be (7) interference from terminal equipment of the local network to base stations of the carrier network, and (8) interference from terminal equipment of the local network to terminal equipment of the carrier network. In this case, by assuming that the local network is subordinate to the carrier network, interference (1) to (4) can be tolerated to a certain extent, and the local network can perform processing to reduce the effects of this interference. On the other hand, since the interferences described in (5) to (8) are interferences to the preferred network, the local network must prevent such interference from occurring or sufficiently suppress it.

[0021] In one example, interference (5) can be sufficiently suppressed by having the local network base station transmit a signal at the same time that the carrier network base station transmits a signal. Furthermore, interference (6) and (7) can be sufficiently suppressed by making the frequency bands of the signals transmitted and received by the carrier network base station and the frequency bands of the signals transmitted and received by the local network base station different. In addition, interference (8) can also be sufficiently suppressed by having the local network terminal equipment transmit a signal at the same time that the carrier network terminal equipment transmits a signal.

[0022] On the other hand, recent cellular communication standards have standardized a time-division duplex (TDD) scheme that allows for flexible changes to the ratio of downlinks (where signals are transmitted from base station equipment to terminal equipment) and uplinks (where signals are transmitted from terminal equipment to base station equipment). Generally, the demand for downlink communication is high, so carrier networks tend to allocate many time slots to downlinks. On the other hand, local networks may require more uplink time slots than carrier networks, depending on their application. In this case, the local network can allocate time slots to uplinks and downlinks independently of the carrier network's allocation of time slots to uplinks and downlinks (see Patent Document 2). However, in this case, the interference described in (5) and (8) above occurs.

[0023] In contrast, in the local network, it is possible to change and use only a portion of the time slot allocation of the carrier network. For example, it is possible to set it so that only a portion of the slots allocated to the uplink in the carrier network are allocated to the downlink, and the slots allocated to the downlink in the carrier network are used as is for the downlink. Alternatively, it is possible to set it so that only a portion of the slots allocated to the downlink in the carrier network are allocated to the uplink, and the slots allocated to the uplink in the carrier network are used as is for the uplink. With the former setting, while downlink communication is taking place in the carrier network, terminal equipment in the local network does not transmit signals, thus suppressing interference (8). On the other hand, with the latter setting, while uplink communication is taking place in the carrier network, base stations in the local network do not transmit signals, thus suppressing interference (5).

[0024] Here, we consider the case where a setting that avoids interference as described in (5) is used, from the perspective of protecting the base station equipment of the carrier network. An example of the time slot setting in this case is shown in Figure 13. In Figure 13, "U" indicates the time slot allocated to uplink communication, "D" indicates the time slot allocated to downlink communication, and "S" indicates the time slot indicating the period of switching from downlink to uplink. Note that communication that allocates time slots in the local network by changing the direction of some of the communication (uplink or downlink) among the time slot allocations of the carrier network may be called quasi-synchronous TDD communication (see Patent Document 2). In this embodiment, in particular, as shown in Figure 13, communication that uses a TDD pattern in the local network where the time slot allocated to the downlink in the carrier network's time slots is used for the uplink is called quasi-synchronous TDD. On the other hand, communication that uses the same TDD pattern in the local network as the time slot allocated to the downlink in the carrier network's time slots is called synchronous TDD.

[0025] In this embodiment, base stations 111, 112, 121, and 122 are base stations of a TDD system, and the uplink (UL) and downlink (DL) communication schedules of each base station are operated by synchronous TDD or quasi-synchronous TDD.

[0026] Figure 2 is a block diagram showing an example configuration of the management device 10. The management device 10 includes a control unit 201, a storage unit 202, and a communication unit 203.

[0027] The control unit 201 controls the entire management device 10 by executing a control program stored in the memory unit 202. The memory unit 202 is a storage device that stores various information, such as the control program executed by the control unit 201.

[0028] The communication unit 203 is a communication unit for performing wireless communication with base station control devices 11 and 12.

[0029] Furthermore, the control unit 201 executes the control program stored in the memory unit 202 and operates as a usage request receiving unit 211, a TDD pattern determination unit 212, an interference estimation unit 213, and a usage condition determination unit 214.

[0030] The usage request receiving unit 211 receives frequency resource usage requests from base station control devices 11 and 12.

[0031] The TDD pattern determination unit 212 is a TDD pattern determination unit that determines the TDD communication schedule (TDD pattern) from the usage requests received from the base station control devices 11 and 12.

[0032] The interference estimation unit 213 estimates the interference between service areas formed by base stations using frequency resources, and estimates the magnitude of the impact on other wireless communication networks if a base station uses frequency resources in accordance with a received usage request.

[0033] The usage condition determination unit 214 determines whether or not to permit the use of the frequency resource related to the usage request. If it determines that the use of the frequency resource related to the usage request is not permitted, it also determines whether or not there are alternative frequency resources that can be used.

[0034] Database 221 holds information about available frequency resources and information about frequency resources that are currently in use.

[0035] If base station 112 in Figure 1 wishes to use a shared frequency resource, the base station control device 11 sends a usage request message (desired conditions information) containing the information shown in Figure 3(a) to the management device 10. The usage request message includes the identifier (ID) of the base station wishing to use the resource, the location of the base station, the desired frequency, output (transmit power), time period (date and time of use), and information regarding the TDD pattern. In the example in Figure 3(a), it indicates that base station 112, located at "(latitude) 35.459196N, (longitude) 139.636106E", wishes to use the frequency resource in the 4600-4700MHz frequency band during the time period from 8:00 to 19:00 with an output of 23dBm and a quasi-synchronous TDD pattern. The desired conditions information may also be transmitted in the form of a markup language in the usage request message, as shown in Figure 3(b).

[0036] Furthermore, the database 221 of the management device 10 stores information about base stations 111, 121, and 122 that are using frequency resources, as well as information about the frequency resources used by these base stations (usage condition information), as shown in Figure 4. Regarding information about base stations using frequency resources, similar to Figure 3(a), the database 221 also stores the base station identifier and location, as well as the frequency, output, time zone, and TDD pattern of the frequency resource being used.

[0037] Figure 5 is a flowchart showing a resource management method in the wireless communication system 1 according to this embodiment, which notifies a user of information about available frequency resources (alternative condition information) when permission to use frequency resources under the conditions of the usage request is not granted. The process in Figure 5 is performed by the management device 10 at predetermined time intervals.

[0038] In processing step S501 (hereinafter referred to as S501; the same applies to subsequent processing steps), the management device 10 awaits requests for the use of shared frequency resources from each local 5G licensee. When the management device 10 receives a request for use, it determines whether the TDD pattern related to the received request is a quasi-synchronous TDD (S502).

[0039] If the TDD pattern of the received usage request is not quasi-synchronous TDD (No in S502), the base station will not interfere with the carrier network base stations, and therefore a message is returned indicating that the requested usage is OK (S503).

[0040] If the TDD pattern of the received usage request is quasi-synchronous TDD (Yes in S503), the management device 10 proceeds to S504 and determines whether interference with other wireless communication networks will occur if the user uses the frequency resources under the conditions of the usage request.

[0041] In the S504 determination, as shown in Figure 6, assuming that the base station 112 transmits a radio signal according to the location, frequency, and output of the base station 112 corresponding to the usage request, the area where the signal strength of the radio signal is expected to exceed a predetermined value (expected interference area) is estimated. For example, it can be assumed that a circular expected interference area will occur from the location of the base station 112 based on its output. In one example, if the base station 112 is using a directional antenna, the shape of the expected interference area can be estimated according to the antenna directivity by including information indicating the antenna directivity of the base station 112 in the usage request.

[0042] Similarly, for base stations already utilizing frequency resources, the system estimates the area where the signal strength of the radio signal is expected to exceed a predetermined value (interference area). It then determines whether the interference area of ​​the already operating base station overlaps with the expected interference area of ​​the base station in question, and determines that interference occurs if they overlap. Furthermore, if the desired usage time is limited, it may be determined that no interference occurs even if the interference area and the expected interference area overlap, provided that the usage time does not overlap with that of base stations already utilizing frequency resources.

[0043] If the estimation results determine that no interference will occur between the user and other users (No in S504), the management device 10 returns a message to the base station control device 11 permitting the use of the frequency resource under the conditions (desired conditions) related to the usage request (S503).

[0044] If the estimation results determine that interference will occur between the prospective user and other users (YES in S504), the management device 10 proceeds to S505 and determines whether there are any base stations operating with synchronous TDD among the TDD patterns of the other users where interference is determined to occur.

[0045] If it is determined that there are no base stations operating in synchronous TDD mode (No in S505), then other users who are also determined to be causing interference are also using a semi-synchronous pattern. Therefore, it is assumed that no interference will occur due to the TDD patterns being used by the prospective user and other users being different (synchronous and semi-synchronous), and a message is returned allowing the user to use the service as requested (S503).

[0046] If the management device 10 determines that there is a base station operating with synchronous TDD (Yes in S505), it notifies the user of the conditions (alternative conditions) regarding available frequency resources (S506).

[0047] The alternative conditions are information as shown in Figure 7(a). Specifically, the location, frequency, output, time zone, and TDD pattern are notified in association with the identifier of the notified condition. The data format is expressed using a markup language as shown in Figure 7(b).

[0048] For example, under the condition ID=1, the output is 15 dBm compared to the usage request shown in Figure 3(a). In other words, under the condition ID=1, the management device 10 notifies that usage will be permitted if the output is reduced compared to the output related to the usage request. Under the condition ID=2, the management device 10 notifies that usage will be permitted if the TDD pattern related to the usage request is changed to a synchronous TDD pattern.

[0049] As a result, when the use of frequency resources under the usage conditions included in the user's request is not possible due to the usage status of other users, it becomes possible to provide information for the user to make an alternative decision. This allows the local 5G licensee to decide whether or not they wish to use the frequency resources of base station 112 again under alternative conditions, thereby improving the convenience for users who wish to use shared frequency resources.

[0050] <Second Embodiment> In the first embodiment, a case was described in which the wireless communication system 1 includes base stations 111, 112, 121, and 122, which are local 5G base stations, and these base stations share frequency resources. In the second embodiment, the sharing of frequency resources in a wireless communication system 2, which further includes public service wireless base stations, is described. Note that the same reference numerals are used for the same configurations, functions, and processes as in the first embodiment, and their explanations are omitted.

[0051] Figure 8 is a configuration diagram of the wireless communication system 2 according to this embodiment. Similar to the first embodiment, the wireless communication system 2 includes a management device 10, base station control devices 11 and 12, and base stations 111, 112, 121, and 122. In this embodiment, the wireless communication system 2 also includes a radio station control device 801 and a public service radio station 811.

[0052] In Figure 8, as in the first embodiment, the number of local 5G licensees, i.e., the number of base station control stations, is set to 2, and the number of base stations installed by each licensee is set to 2. In addition, the number of radio station control devices 801 installed by the operator operating the public service radio is set to 1, and the number of public service radio stations 811 controlled by the radio station control devices 801 is set to 1.

[0053] Public service radio will use the same 4600-4800MHz frequency range as local 5G, and while public service radio is using this frequency, local 5G will cease using this frequency to avoid interference with public service radio. In other words, public service radio will be the primary user and local 5G the secondary user, with primary users having priority over secondary users of frequency resources. Public service radio station 811 will be controlled by radio station control device 801. Radio station control device 801 can communicate with management device 10.

[0054] Furthermore, in this embodiment, as will be described later with reference to Figures 9(a) and 9(b), it is assumed that the public service radio station 811 and the base stations 111, 121, and 122 are utilizing frequency resources.

[0055] The configuration of the management device 10 is the same as that of the first embodiment described with reference to Figure 2, so its explanation will be omitted. When base station 112, which is a local 5G base station, wishes to use the shared frequency, the base station control device 11 sends a message to the management device 10 containing information as shown in Figure 3(a).

[0056] Furthermore, the database 221 of the management device 10 stores information about the already operational base stations 111, 121, and 122 as shown in Figure 9(b), and information about the public service radio station 811 as shown in Figure 9(a). Specifically, for public service radio, which is the primary user, the database 221 stores information about the base station identifier and location, as well as the frequency, output, and time zone of the frequency resource being used. For local 5G, which is the secondary user, the database 221 stores information about the operational base station identifier and location, as well as the frequency, output, time zone, and TDD pattern of the frequency resource being used.

[0057] Figure 10 is a flowchart illustrating a resource management method that provides information on available frequency resources when permission to use frequency resources cannot be granted under the conditions of a request from a secondary user. The flowchart shown in Figure 10 is executed by the management device 10.

[0058] In S1001, the management device 10 awaits requests for the use of the shared frequency from each local 5G licensee, who are secondary users. In this embodiment, it is explained that the base station control device 11 receives requests for the use of the frequency resources of base station 112, as described with reference to Figure 3(a). When a request for use is received (Yes in S1001), the management device 10 determines whether or not it will interfere with the public service radio system, which is the primary user (S1002).

[0059] In the determination in S1002, the communication area of ​​base station 112 at the requested frequency is first estimated from the location, frequency, and output of the base station, as shown by the dashed line in Figure 11. Then, assuming that a terminal exists at each point on the dashed line (the edge of the communication area), the area where the signal strength of the radio signal transmitted by the terminal exceeds a predetermined value is determined as shown by the solid line in the figure. In this case, the frequency of the terminal is the same as that of the base station, and the output of the terminal is set to the maximum value of 23 [dBm] for terminal output as defined by the 3GPP standard. The dotted line formed by connecting these solid lines is estimated as the assumed interference area where radio signals transmitted in the radio communication network provided by base station 112 may cause interference to other radio communication networks. Then, based on the location, frequency, and output of the primary user, public service radio station 811, it is determined whether or not interference occurs based on whether or not there is overlap with the interference area determined in the same way as in Figure 6 of the first embodiment. If the desired usage time is limited, the overlap of usage time may also be considered.

[0060] If the management device 10 determines that interference will occur due to the use of the frequency resource related to the received usage request by the base station 112 (Yes in S1002), the use by the primary user, the public service radio, takes precedence. For this reason, the management device 10 returns a message to the secondary user, the base station 112, notifying it that it will not be permitted to use the frequency resource (S1003).

[0061] If it is determined that using the frequency resource related to the received usage request will cause interference to other wireless communication networks (No in S1002), it is determined whether the TDD pattern of the usage request is a quasi-synchronous TDD pattern (S502). The explanation from S502 onward is the same as that of the first embodiment described with reference to Figure 5, so the explanation is omitted.

[0062] The alternative conditions notified in S506 are the information shown in Figure 12. Here, the conditions under which the request for use can be approved by changing one or more items are notified.

[0063] As described above, there is no overlap in the use of frequency resources with primary users. However, if the use of frequency resources requested by base station 112 cannot be permitted due to the usage status of other secondary users, information on alternative conditions different from those of the usage request will be provided. This makes it possible to provide information for deciding whether or not to use frequency resources under alternative conditions when the usage request cannot be fulfilled. As a result, the local 5G licensee operating base station 112 will be able to decide, based on the provided information, whether or not to use base station 112 under alternative conditions.

[0064] <Third Embodiment> In the first embodiment, the process described was how, upon receiving a new usage request, the management device 10 determines whether or not to permit the usage request, and if the usage request is not permitted, it notifies the base station control device 11 that sent the usage request of alternative conditions.

[0065] However, there are cases where the management device 10 may prioritize the wireless communication network related to the request over the wireless communication network that is actually using the frequency resources, such as when the management device 10 receives a request to use frequency resources from a public wireless network. Priority may also be set between multiple local 5G networks. The processing by the management device in such cases will be explained with reference to Figure 5.

[0066] In this embodiment, the management device 10 manages information regarding the priority of base stations utilizing frequency resources in the database 221. The management device 10 also acquires information that can identify the priority of the wireless communication network provided by the base station related to the usage request.

[0067] Then, in S504 of Figure 5, if there is an overlap between the interference area of ​​other users and the assumed interference area assuming that frequency resources are used according to the usage request, the priority of the wireless communication network using the frequency resources is compared with the priority of the wireless communication network related to the usage request. If the priority of the wireless communication network using the frequency resources is low, the base station control unit of the low-priority wireless communication network is notified of alternative conditions for the frequency resources. For example, an instruction is sent to reduce the output strength of the wireless signal. Alternatively, an instruction is sent to change the usage conditions of the already used frequency resources, such as switching the TDD pattern or changing the frequency. In this case, a usage permission message may be sent to the frequency resource usage request from the higher-priority wireless communication network. This makes it possible to change the operation of the low-priority base station so as not to interfere with the higher-priority base station related to the usage request if the low-priority base station is already using the frequency resources.

[0068] In this embodiment, the usage conditions for multiple frequency resources used by multiple base stations may be changed in response to a single usage request. For example, in response to a frequency resource usage request from a higher-priority wireless communication network, the usage conditions for frequency resources used by multiple other wireless communication networks that interfere with the wireless communication network to which the usage request pertains may be changed.

[0069] This allows the management device to flexibly manage the use of shared frequency resources, improving convenience for users when they wish to utilize the available frequency resources.

[0070] <Other Embodiments> In one example, the management device 10 may select alternative condition information to notify if it does not permit the request for use, depending on the performance of the base station to which the request pertains. For example, upon receiving a request for use that includes information that can identify the mobility performance, such as whether or not the base station is mobile, the management device can switch whether or not to notify alternative condition information that includes information indicating a different location from the request for use.

[0071] Furthermore, upon receiving a usage request that includes information that can identify the base station's wireless performance, such as the output strength of the base station's radio signal and the frequencies that the communication unit can output, the system will notify the user of alternative conditions information that indicates different frequencies, output, and TDD patterns than those requested in the usage request. For example, in response to a usage request from a base station that can only transmit and receive radio signals at frequencies of 4600-4700MHz, the system will not notify the user of alternative conditions information indicating frequency resources at frequencies of 4700-4800MHz. This prevents unnecessary information from being transmitted to prospective users considering alternative conditions, thereby improving convenience for prospective users when considering alternative conditions.

[0072] The present invention can also be realized by supplying a program that implements one or more of the functions of the above-described embodiments to a system or device via a network or storage medium, and by having one or more processors in the computer of that system or device read and execute the program. It can also be realized by a circuit (e.g., an ASIC) that implements one or more functions.

[0073] The invention is not limited to the embodiments described above, and various modifications and variations are possible without departing from the spirit and scope of the invention. Accordingly, claims are attached to disclose the scope of the invention. [Explanation of Symbols]

[0074] 10 Management device, 201 Control unit, 202 Storage unit, 203 Communication unit, 211 Usage request confirmation unit, 212 TDD pattern determination unit, 213 Interference estimation unit, 214 Usage condition determination unit, 221 Database

Claims

1. A management device for managing shareable frequency resources, An acquisition means for acquiring usage condition information relating to the usage conditions of the frequency resources used by the first wireless communication network, and desired condition information relating to the conditions under which the second wireless communication network wishes to use the frequency resources, An estimation means for estimating the influence of the wireless signal on the wireless communication of the first wireless communication network, assuming that a wireless signal is transmitted in accordance with the desired conditions information in the second wireless communication network based on the usage conditions information and the desired conditions information, A determination means for determining whether or not to change the operation of the frequency resources corresponding to the usage condition information by the first wireless communication network based on the estimation result of the estimation means, If the determination means determines that the operation of the frequency resource corresponding to the usage condition information should be changed, a notification means provides alternative condition information regarding the usage conditions of the available frequency resource. A control device characterized by being equipped with the following features.

2. The management device according to claim 1, characterized in that the acquisition means acquires information regarding the frequency of the frequency resource in use, the transmission power, the date and time of use, and the time division duplex (TDD) communication schedule as the usage condition information.

3. The management device according to claim 1 or 2, characterized in that the desired conditions information includes information that can identify the location of the base station of the first wireless communication network, the frequency of the frequency resource to be used, the transmission power, the date and time of use, and the time division duplex (TDD) communication schedule.

4. The management device according to claim 3, characterized in that the notification means notifies the alternative condition information which includes an instruction for a transmission power lower than the transmission power included in the desired condition information.

5. The management device according to claim 3 or 4, characterized in that the notification means notifies the alternative condition information which includes instructions for a TDD communication schedule, frequency, and usage date and time that are different from one of the TDD communication schedule, frequency, and usage date and time included in the desired condition information.

6. The management device according to any one of claims 3 to 5, characterized in that the notification means notifies the alternative condition information, which includes the usage conditions of a plurality of frequency resources.

7. The acquisition means acquires information that can identify at least one of the mobile performance and radio performance of the base station of the second wireless communication network, The management device according to any one of claims 3 to 6, characterized in that the notification means selects the alternative condition information based on at least one of the mobile performance and wireless performance of the base station of the second wireless communication network acquired by the acquisition means.

8. The estimation means is, In accordance with the usage conditions information, a first area is estimated in which the wireless signal transmitted by the first wireless communication network is greater than or equal to a first value. Assuming that a wireless signal is transmitted in the second wireless communication network according to the aforementioned desired conditions information, a second area is estimated in which the signal strength of the wireless signal is equal to or greater than the second value. The management device according to any one of claims 3 to 7, characterized in that it estimates the influence of wireless communication in the second wireless communication network on wireless communication in the first wireless communication network based on the first area and the second area.

9. The aforementioned preference information includes information regarding the antenna directivity of the base station of the second wireless communication network, The management device according to claim 8, characterized in that the estimation means estimates the second area based on the antenna directivity of the base station of the second wireless communication network.

10. The management device according to claim 8 or 9, characterized in that the estimation means estimates the second area including an area where the signal strength of the radio signal transmitted by a terminal device is greater than or equal to a predetermined value, assuming that a terminal device that transmits a radio signal exists at the edge of the communication area of ​​a base station of the second wireless communication network.

11. The management device according to claim 10, characterized in that the estimation means assumes the antenna directivity of the terminal device and estimates the second area based on the assumed antenna directivity of the terminal device.

12. The estimation means is, In accordance with the usage conditions information, a first area is estimated in which the wireless signal transmitted by the first wireless communication network is greater than or equal to a first value. Assuming that a wireless signal is transmitted in the second wireless communication network according to the aforementioned desired conditions information, a second area is estimated in which the signal strength of the wireless signal is equal to or greater than the second value. The management device according to claim 1, characterized in that the determination means determines that if the first area and the second area overlap, and the TDD communication schedule related to the desired conditions information is the same as the TDD communication schedule in the second area, the operation of the frequency resources corresponding to the usage conditions information by the first wireless communication network will not be changed.

13. The estimation means is, In accordance with the usage conditions information, a first area is estimated in which the wireless signal transmitted by the first wireless communication network is greater than or equal to a first value. Assuming that a wireless signal is transmitted in the second wireless communication network according to the aforementioned desired conditions information, a second area is estimated in which the signal strength of the wireless signal is equal to or greater than the second value. The first wireless communication network has priority over the second wireless communication network in utilizing the frequency resources. The management device according to claim 1, characterized in that the determination means changes the operation of the frequency resources corresponding to the usage condition information by the first wireless communication network when the first area and the second area overlap.

14. The management device according to any one of claims 1 to 13, characterized in that the first wireless communication network and the second wireless communication network are local 5G (fifth generation mobile communication) networks.

15. A resource management method performed by a management device that manages shareable frequency resources, To obtain usage condition information regarding the usage conditions of the frequency resources used by the first wireless communication network, and desired condition information regarding the conditions under which the second wireless communication network wishes to use the frequency resources, Based on the usage conditions information and the desired conditions information, assuming that wireless signals are transmitted in the second wireless communication network according to the desired conditions information, the influence of wireless communication in the second wireless communication network on wireless communication in the first wireless communication network is estimated. Based on the estimation results, a determination is made as to whether or not to change the operation of the frequency resources corresponding to the usage conditions information by the first wireless communication network, If it is determined that the operation of the frequency resource corresponding to the aforementioned usage conditions information will be changed, alternative conditions information regarding the usage conditions of the available frequency resource will be notified. A resource management method characterized by including the following.

16. A program executed by a management device that manages shareable frequency resources, An acquisition step of acquiring usage condition information relating to the usage conditions of the frequency resources used by the first wireless communication network, and desired condition information relating to the conditions under which the second wireless communication network wishes to use the frequency resources, An estimation step of estimating the influence of wireless communication in the second wireless communication network on wireless communication in the first wireless communication network, assuming that wireless signals are transmitted in the second wireless communication network in accordance with the desired conditions information, based on the usage conditions information and the desired conditions information. A determination step of determining whether or not to change the operation of the frequency resources corresponding to the usage condition information by the first wireless communication network based on the estimation result, If it is determined that the operation of the frequency resource corresponding to the usage conditions information will be changed, a notification step is made to notify the user of alternative conditions information regarding the usage conditions of the available frequency resource. A program characterized by including the following.

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