COMMUNICATION CONTROL METHOD AND COMMUNICATION CONTROL APPARATUS

Abstract

Provided is a method in which, to restrict the transmission power of a second wireless device for the sake of a first wireless device, a transmission power value is efficiently determined while a radio wave propagation model to be used is changed according to the distance between the wireless devices. One method according to this disclosure comprises: a first step for generating a plurality of regions to which any one of a plurality of transmission power values is allocated each on the basis of at least the position of the first wireless device, the plurality of transmission power values, and a plurality of radio wave propagation models; and a second step for determining a transmission power value for the second wireless device on the basis of the transmission power value allocated to a region that does not include the position of the second wireless device. The first step comprises a step for: calculating a region candidate using any one of the plurality of radio wave propagation models; confirming the appropriateness of the radio wave propagation model used on the basis of the distance between the boundary of the region candidate and the first wireless device; and if such model is not appropriate, calculating another region candidate using another radio wave propagation model.

Description

[Technical field]

[0001] The present disclosure relates to a communication control method and a communication control device. [Background technology]

[0002] The problem of exhaustion of radio wave resources (e.g., frequencies) that can be allocated to wireless systems has surfaced due to the increase in wireless environments where various wireless systems coexist and the diversification of content provided via wireless. As a result, "Dynamic Spectrum Access (DSA)", which utilizes unused temporal and spatial white space among frequency bands allocated to specific wireless systems, is rapidly gaining attention both in Japan and overseas as a means of generating the necessary radio wave resources.

[0003] In the United States, as the introduction of Citizens Broadband Radio Service (CBRS) utilizing frequency sharing technology progresses, a report and order (R&O) has been issued regarding the opening of the 6GHz band as a shared frequency band. The report and order stipulates the relationship between separation distance and radio wave propagation model as a requirement for protecting services called fixed microwave services. For example, it stipulates that the free space path loss model should be used for separation distances up to 30m. It also stipulates that the Wireless World Initiative New Radio phase II (WINNER II) model should be used for separation distances between 30m and 1km, and that location-dependent information such as buildings and terrain should be used to determine line-of-sight / non-line-of-sight (LOS / NLOS) when using this model. It also stipulates that the irregular terrain model (ITM) and an appropriate clutter model should be used for separation distances of 1km or more.

[0004] In addition, in the Automated Frequency Coordination (AFC) system introduced to protect Fixed Microwave Services, in addition to the above requirements, it is mandatory to calculate the Co-channel Exclusion Zone and Adjacent Channel Exclusion Zone, where secondary use of the same channel and adjacent channels is prohibited. In order to do so, it is necessary to calculate the separation distance. In addition, when determining whether a frequency can be used, the AFC system divides the transmittable power of the frequency into power widths of less than 3 dB and requires confirmation of each power width. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 5258444 [Patent Document 2] Patent No. 6277893 [Non-patent literature]

[0006] [Non-Patent Document 1] FCC (Federal Communications Commissions), April 25, 2020, "Report and Order and Further Notice of Proposed Rulemaking", "https: / / www.fcc.gov / ecfs / filing / 0424167164769" [Non-Patent Document 2] CBRS Alliance "CBRSA-TS-2001" February 1, 2018 "https: / / www.cbrsalliance.org / wp-content / uploads / 2018 / 06 / CBRSA-TS-2001-V1.0.0.pdf" [Non-Patent Document 3] WINNF(Wireless Innovation Forum),"WINNF-TS-0112","https: / / winnf.memberclicks.net / assets / CBRS / WINNF-TS-0112.pdf" [Non-Patent Document 4] CEPT ECC, "ECC Report 186 Technical and operational requirements for the operation of white space devices under geo-location approach", January 2013," https: / / www.ecodocdb.dk / download / 124023a2-73ee / ECCREP186.PDF" [Non-Patent Document 5] The National Archives, “The Wireless Telegraphy (White Space Devices) (Exemption) Regulations 2015”, “http: / / www.legislation.gov.uk / uksi / 2015 / 2066 / contents / made” [Non-Patent Document 6] WINNF,"WINNF-SSC-0010", "https: / / winnf.memberclicks.net / assets / CBRS / WINNF-SSC-0010.pdf" [Non-Patent Document 7] FCC (Federal Communications Commissions), "CFR (Code of Federal Regulations) Part 96", "https: / / www.ecfr.gov / cgi-bin / retrieveECFR?gp=&SID=2dd346ae3b51f2866ab6fb907e755526&mc=true&r=PART&n=pt47.5.96" [Non-Patent Document 8] 3GPP(3rd Generation Partnership Project), "TS(Technical Specification)36.104", "https: / / portal.3gpp.org / desktopmodules / Specifications / SpecificationDetails.aspx?specificationId=2412" [Non-Patent Document 9] 3GPP, "TS38.104", "https: / / portal.3gpp.org / desktopmodules / Specifications / SpecificationDetails.aspx?specificationId=3202" [Non-Patent Document 10] ETSI (European Telecommunications Standards Institute), "EN 301 598", "https: / / www.etsi.org / deliver / etsi_en / 301500_301599 / 301598 / 01.01.01_60 / en_301598v010101p.pdf" [Non-Patent Document 11] WINNF,"WINNF-TS-0016","https: / / winnf.memberclicks.net / assets / CBRS / WINNF-TS-0016.pdf" [Non-Patent Document 12] WINNF,"WINNF-TS-0247","https: / / winnf.memberclicks.net / assets / CBRS / WINNF-TS-0247.pdf" [Non-Patent Document 13] White Space Database Provider (WSDB) Contract, available at "https: / / www.ofcom.oro.uk / __data / assets / pdf_file / 0026 / 84077 / white_space_database_contract_for_operatioper_use_of_wsds.pdf" [Non-Patent Document 14] WINNF,"WINNF-TS-0096","https: / / winnf.memberclicks.net / assets / CBRS / WINNF-TS-0096.pdf" [Non-Patent Document 15] Wireless Innovation Forum "WINNF-TS-0061" October 7, 2019 "https: / / winnf.memberclicks.net / assets / CBRS / WINNF-TS-0061.pdf" Summary of the Invention [Problem to be solved by the invention]

[0007] Conventionally, the above requirements have not been required. Therefore, in conventional technology, changing the radio wave propagation model used according to the distance is not assumed. Therefore, when conventional technology is used, it is necessary to add a process for selecting an appropriate radio wave propagation model, which may result in a larger load and delay than before.

[0008] Therefore, the present disclosure provides a method for efficiently determining a transmission power value while changing the radio wave propagation model used depending on the distance between the two radio devices when limiting the transmission power of a second radio device for the sake of a first radio device. [Means for solving the problem]

[0009] One method according to the present disclosure includes a first step of generating a plurality of regions to which any of a plurality of transmission power values ​​is assigned based at least on the position of a first radio device, a plurality of transmission power values, and a plurality of radio wave propagation models, and a second step of determining a transmission power value of the second radio device based on a transmission power value assigned to a region not including the position of the second radio device. The first step includes a step of calculating a region candidate using any of the plurality of radio wave propagation models, checking the validity of the radio wave propagation model used based on the distance between the boundary of the region candidate and the first radio device, and calculating another region candidate using another radio wave propagation model if the model is not valid.

[0010] A frequency range may be assigned to each of the multiple regions in advance, and the determined transmission power value may be a transmission power value permitted for wireless communication in the frequency range assigned to the region of the second radio device.

[0011] In the step of calculating the area candidate, a position of the second radio device is calculated such that when the second radio device transmits radio waves in the frequency range and transmission power value assigned to the area, the power value of the radio waves observed at the first radio device is approximately the same as the tolerable interference power of the first radio device, and the calculated position of the second radio device may become the boundary of the area candidate.

[0012] When a first frequency range used by the first radio device or a frequency range entirely contained within the first frequency range is assigned to the area, a calculated value based on a transmission power value assigned to the area and a propagation loss based on a selected radio wave propagation model may be regarded as the power value of the radio wave observed in the first radio device.

[0013] When a frequency range outside a first frequency range used by the first radio device is assigned to the area, a calculated value based on the interference power in the first frequency range caused by radio waves transmitted by the second radio device at the frequency range and transmission power value assigned to the area and the amount of propagation loss based on a selected radio wave propagation model may be regarded as the power value of the radio waves observed in the first radio device.

[0014] The method may further include a step of acquiring a queried frequency range from the second radio device, the multiple regions being region sets generated for each predetermined frequency range, and in the step of determining the transmission power value, a region set based on the queried frequency range is selected, and the determined transmission power value may be determined based on the selected region set.

[0015] If the inquiry frequency range includes a first frequency range used by the first radio device, a region set to which the first frequency range is assigned may be selected, and a transmission power value permitted in the first frequency range of the second radio device may be determined.

[0016] If the inquiry frequency range includes frequencies within a second frequency range that is contiguous with a first frequency range used by the first radio device and has the same length as the first frequency range, a region set to which the second frequency range is assigned may be selected, and a transmission power value permitted in the second frequency range of the second radio device may be determined.

[0017] When the inquiry frequency range includes a frequency within a second frequency range that is contiguous with a first frequency range used by the first radio device and has the same length as the first frequency range, a region set to which a third frequency range within the second frequency range is assigned and a region set to which a fourth frequency range within the second frequency range is assigned are selected, and a transmission power value permitted in the third frequency range of the second radio device and a transmission power value permitted in the fourth frequency range of the second radio device are determined, and the third frequency range and the fourth frequency range may be determined based on interference power to the first frequency range.

[0018] The method may further include a step of acquiring information regarding out-of-band emission limitations, and in the step of generating the plurality of regions, the set of regions may be generated for each frequency range having a different slope of a graph showing the relationship between frequency and the limitation level of the out-of-band emission limitations.

[0019] extracting, from the inquiry frequency range, at least one of a frequency range entirely contained within a first frequency range used by the first radio device, a frequency range entirely containing the first frequency range, and a frequency range partially overlapping with the first frequency range; The set of regions may be generated to which the extracted frequency ranges are assigned.

[0020] In the step of calculating the area candidate, a position of the second radio device is calculated where the power value of the radio waves observed at the first radio device when the second radio device transmits radio waves in the frequency range and transmission power value assigned to the area will be approximately the same as the tolerable interference power of the first radio device, the calculated position of the second radio device becomes the boundary of the area candidate, the power value of the radio waves observed at the first radio device is a calculated value based on the transmission power value assigned to the area set, an interference ratio, and an amount of propagation loss based on a selected radio wave propagation model, and the interference ratio may be based on the respective lengths of an overlapping range between the extracted frequency range and the first frequency range, a non-overlapping range in the extracted frequency range with the first frequency range, and a non-overlapping range in the first frequency range with the extracted frequency range.

[0021] The step of generating the plurality of regions may further include a step of calculating the plurality of transmission power values ​​based on a maximum transmission power value and a minimum transmission power value that the second radio device can output.

[0022] The boundary of the candidate area and the position of the second radio device may be represented in three-dimensional coordinates including two-dimensional coordinates of the second radio device and the height of the antenna, and the distance between the boundary of the area or the second radio device and the first radio device may be represented as a spatial distance based on the difference between the height of the antenna of the second radio device and the height of the antenna of the first radio device.

[0023] The multiple regions may be represented by concentric circles centered on the position of the first wireless device.

[0024] A boundary point of the area candidate may be calculated for each predetermined azimuth angle from a reference direction from the position of the first radio device, and the area may be represented by a shape connecting adjacent boundary points.

[0025] Each of the multiple radio wave propagation models may have a distance range defined, and when the distance between the boundary of the candidate area and the first radio device is within the distance range defined for the used radio wave propagation model, the used radio wave propagation model may be determined to be valid.

[0026] The method may further include a step of acquiring a position of the second radio device, and when an area including the position of the second radio device is the same before and after a change in the position of the second radio device, the transmission power value permitted in the wireless communication of the second radio device is not changed, and when an area including the position of the second radio device is not the same before and after a change in the position of the second radio device, a step of determining the transmission power value is executed to newly determine the transmission power value permitted in the wireless communication of the second radio device.

[0027] The method may further include a step of acquiring a planned movement range of the second radio device, and in the step of determining the transmission power value, the permitted transmission power value may be determined based on a transmission power value assigned to an area that does not include the planned movement range of the second radio device.

[0028] In another aspect of the present disclosure, a communication control device is provided, comprising: an area generating unit that generates multiple areas based on a position of a first wireless device and to which one of the multiple transmission power values ​​is assigned based on at least a plurality of transmission power values ​​and a plurality of radio wave propagation models, and a transmission power determining unit that determines a transmission power value permitted in wireless communication of the second wireless device based on a transmission power value assigned to an area that does not include the position of a second wireless device among the multiple areas. The area generating unit of the communication control device calculates an area candidate that is a candidate for the area using one of the multiple radio wave propagation models, checks the validity of the used radio wave propagation model based on the distance between the boundary of the area candidate and the first wireless device, and calculates another area candidate using another radio wave propagation model if the used radio wave propagation model is not valid. [Brief description of the drawings]

[0029] [Figure 1]FIG. 2 is a diagram showing a system model in one embodiment of the present invention. [Diagram 2] FIG. 1 illustrates a network configuration in which autonomous decision-making can be applied. [Diagram 3] FIG. 1 illustrates a network configuration in which centralized decision-making can be applied. [Figure 4] A diagram showing a network configuration when both centralized and decentralized decision-making are applied. [Diagram 5] A diagram explaining the three-tier structure of CBRS. [Figure 6] Diagram showing E-UTRA transmission bandwidth specifications [Figure 7] Diagram showing 5G NR transmission bandwidth specifications [Figure 8] FIG. 2 is a diagram for explaining the flow of signaling between terminals. [Figure 9] FIG. 2 is a diagram showing components for calculating a transmission power value of a communication control device. [Figure 10] 6 is a flowchart of a process relating to calculation and setting of an applicable transmission power value. [Figure 11] A diagram explaining EXZ. [Figure 12] 1 is a flowchart showing the flow (algorithm) of the EXZ determination process. [Figure 13] 11A and 11B are diagrams for explaining differences in interference power. [Figure 14] FIG. 13 is a diagram showing an example of out-of-band emission limitations. [Figure 15] FIG. 1 is a diagram for explaining calculation of an adjacent channel interference ratio ACIR. [Figure 16] FIG. 2 is a diagram illustrating calculation of an adjacent channel interference ratio ACIR. [Figure 17] FIG. 3 is a diagram for explaining calculation of an adjacent channel interference ratio ACIR. [Figure 18] FIG. 13 is a diagram for explaining determination of transmission power when a secondary system notifies a planned movement range. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] <<1. Typical anticipated scenarios>> <1.1 System model>

[0031] 1 shows a system model according to an embodiment of the present invention. As shown in FIG. 1, the system model is represented by a communication network 100 including wireless communication, and typically includes the following entities: ·Communication device 110 Terminal 120 ·Communication control device 130 This system model includes at least a primary system and a secondary system that use the communication network 100. The primary system and the secondary system are configured by the communication device 110, or by the communication device 110 and the terminal 120. Various communication systems can be treated as the primary system or the secondary system, but in this embodiment, the primary system and the secondary system use a part or all of the shared frequency band. Note that the frequency bands assigned to the primary system and the secondary system may overlap in part or in whole, or may not overlap at all. That is, this system model will be described as a model of a wireless communication system related to dynamic spectrum sharing (DSA: Dynamic Spectrum Access). Note that this system model is not limited to a system related to dynamic spectrum sharing.

[0032] The communication device 110 is typically a wireless device that provides a wireless communication service to the terminal 120, such as a wireless base station (Base Station, Node B, eNB, gNB, etc.) or a wireless access point. That is, the communication device 110 provides a wireless communication service to enable wireless communication of the terminal 120. The communication device 110 may be a wireless relay device or a radio extension device called a Remote Radio Head (RRH). In the following description, unless otherwise specified, the communication device 110 will be described as an entity that constitutes a secondary system.

[0033] The coverage (communication area) provided by the communication device 110 may be of various sizes, ranging from a large one such as a macrocell to a small one such as a picocell. A plurality of communication devices 110 may form one cell, such as a distributed antenna system (DAS). In addition, if the communication device 110 has a beamforming capability, a cell or a service area may be formed for each beam.

[0034] In this disclosure, it is assumed that there are two different types of communication devices 110.

[0035] In the present disclosure, a communication device 110 that can access the communication control device 130 without using a wireless path that requires permission from the communication control device 130 is called a "communication device 110A." Specifically, for example, a communication device 110 that can connect to the Internet via a wired line can be considered as a "communication device 110A." In addition, for example, even if a wireless relay device does not have a wired Internet connection function, if a wireless backhaul link using a frequency that does not require permission from the communication control device 130 is established with another communication device 110A, such a wireless relay device may also be considered as a "communication device 110A."

[0036] In the present disclosure, a communication device 110 that cannot access the communication control device 130 without a wireless path that requires permission from the communication control device 130 is referred to as a "communication device 110B." For example, a wireless relay device that needs to establish a backhaul link using a frequency that requires permission from the communication control device 130 can be considered as a "communication device 110B." In addition, for example, a device such as a smartphone that has a wireless network providing function represented by tethering and uses a frequency that requires permission from the communication control device 130 in both the backhaul link and the access link may be treated as a "communication device 110B."

[0037] The communication device 110 does not necessarily have to be fixed. For example, the communication device 110 may be installed on a moving object such as an automobile. Also, the communication device 110 does not necessarily have to be on the ground. For example, the communication device 110 may be provided on an object in the air or space, such as an aircraft, a drone, a helicopter, a High Altitude Platform Station (HAPS), a balloon, a satellite, etc. Also, the communication device 110 may be provided on an object on the sea or in the sea, such as a ship or a submarine. Typically, such a mobile communication device 110 corresponds to the communication device 110B, and secures an access path to the communication control device 130 by performing wireless communication with the communication device 110A. Naturally, if the frequency used in wireless communication with the communication device 110A is not managed by the communication control device 130, even a mobile communication device 110 can be treated as the communication device 110A.

[0038] In this disclosure, unless otherwise specified, the term "communication device 110" encompasses the meaning of both communication device 110A and communication device 110B, and may be interpreted as either one.

[0039] The communication device 110 may be used, operated, or managed by various operators. For example, a mobile network operator (MNO), a mobile virtual network operator (MVNO), a mobile network enabler (MNE), a mobile virtual network enabler (MVNE), a shared facility operator, a neutral host network operator (NHN), a broadcasting operator, an enterprise, an educational institution (a school corporation, a board of education of each local government, etc.), a real estate (a building, an apartment, etc.) manager, an individual, etc. may be assumed as operators related to the communication device 110. Note that operators related to the communication device 110 are not particularly limited. Also, the communication device 110A may be a shared facility used by a plurality of operators. Also, the operators who install, use, operate, and manage the facilities may be different from each other.

[0040] A communication device 110 operated by a business operator is typically connected to the Internet via a core network. In addition, operation, management, and maintenance are performed by a function called OA&M (Operation, Administration & Maintenance). For example, as shown in FIG. 1, there may be an intermediate device (network manager) 110C that performs integrated control of the communication devices 110 in the network. The intermediate device may be the communication device 110 or the communication control device 130.

[0041] The terminal 120 (User Equipment, User Terminal, User Station, Mobile Terminal, Mobile Station, etc.) is a device that performs wireless communication by a wireless communication service provided by the communication device 110. Typically, a communication device such as a smartphone corresponds to the terminal 120. Any device equipped with a wireless communication function can correspond to the terminal 120. For example, a device such as a commercial camera having a wireless communication function can also correspond to the terminal 120 even if wireless communication is not its main purpose. In addition, a communication device that transmits data to the terminal 120, such as a broadcasting business wireless station (FPU: Field Pickup Unit) that transmits images for television broadcasting from outside (on-site) to a broadcasting station to broadcast sports, etc., also corresponds to the terminal 120. In addition, the terminal 120 does not necessarily have to be used by a person. For example, as in so-called MTC (Machine Type Communication), a device such as a factory machine or a sensor installed in a building may be connected to a network and operate as the terminal 120. Furthermore, a device called Customer Premises Equipment (CPE), which is provided to ensure an Internet connection, may act as the terminal 120.

[0042] In addition, the terminal 120 may be provided with a relay communication function, as typified by D2D (Device-to-Device) and V2X (Vehicle-to-Everything).

[0043] Similarly to the communication device 110, the terminal 120 does not need to be fixed or located on the ground. For example, an object in the air or space, such as an aircraft, a drone, a helicopter, or a satellite, may operate as the terminal 120. For example, an object on the sea or in the sea, such as a ship or a submarine, may operate as the terminal 120.

[0044] In this disclosure, unless otherwise specified, the terminal 120 corresponds to an entity where a wireless link using a frequency that requires permission from the communication control device 130 terminates. However, depending on the functions that the terminal 120 has and the network topology that is applied, the terminal 120 may operate in the same manner as the communication device 110. In other words, depending on the network topology, a device that can correspond to the communication device 110, such as a wireless access point, may correspond to the terminal 120, and a device that can correspond to the terminal 120, such as a smartphone, may correspond to the communication device 110.

[0045] The communication control device 130 is typically a device that determines, permits, instructs, and / or manages communication parameters of the communication device 110. For example, database servers called TVWSDB (TV White Space Database), GLDB (Geolocation database), SAS (Spectrum Access System), and AFC (Automated Frequency Coordination) correspond to the communication control device 130. In addition, a control device that controls radio interference between devices, as defined in standards such as EN 303 387 of ETSI (European Telecommunications Standards Institute), 802.19.1-2018, and CBRSA-TS-2001 of IEEE, also corresponds to the communication control device 130. In addition, a Registered Location Secure Server (RLSS) defined in IEEE 802.11-2016 also corresponds to the communication control device 130. That is, without being limited to these examples, an entity that is responsible for determining communication parameters of the communication device 110, giving permission to use, instructing, managing, etc., may be called the communication control device 130. Basically, the control target of the communication control device 130 is the communication device 110, but the communication control device 130 may also control the terminal 120 under the control of the communication device 110.

[0046] There may be a plurality of communication control devices 130. When there are a plurality of communication control devices 130, at least one of at least the following three types of decision-making topologies may be applied to the communication control devices 130. ·Autonomous Decision-Making ·Centralized Decision-Making ·Distributed Decision-Making

[0047] Autonomous decision-making is a decision-making topology in which a decision-making entity (a decision-making entity, in this case, the communication control device 130) makes decisions independently of other decision-making entities. The communication control device 130 independently performs necessary frequency allocation and calculations for interference control. For example, autonomous decision-making can be applied when multiple communication control devices 130 are arranged in a distributed manner as shown in FIG. 2.

[0048] Centralized decision-making is a decision-making topology in which a decision-making entity delegates decision-making to another decision-making entity. When centralized decision-making is implemented, for example, a model as shown in FIG. 3 is assumed. FIG. 3 shows a model (so-called master-slave type) in which one communication control device 130 centrally controls multiple communication control devices 130. In the model of FIG. 3, a communication control device 130A, which is a master, controls multiple communication control devices 130B, which are slaves, and is capable of making decisions in a centralized manner.

[0049] Distributed decision-making is a decision-making topology in which a decision-making entity cooperates with another decision-making entity to make a decision. For example, as in the autonomous decision-making of FIG. 2, multiple communication control devices 130 make decisions independently, but each communication control device 130 may adjust or negotiate the decision-making results after making a decision, which may be considered as "distributed decision-making". In addition, for example, in the centralized decision-making of FIG. 3, the master communication control device 130A dynamically transfers or abandons decision-making authority to each slave communication control device 130B for the purpose of load balancing, which may also be considered as "distributed decision-making".

[0050] There may be cases where both centralized decision-making and distributed decision-making are applied. In FIG. 4, the slave communication control device 130B operates as an intermediate device that bundles multiple communication devices 110. The master communication control device 130A does not need to control the communication devices 110 bundled by the slave communication control device 130B, that is, the secondary system configured by the slave communication control device 130B. In this way, as a modified example, an implementation as shown in FIG. 4 is also possible.

[0051] For its role, the communication control device 130 may obtain necessary information from entities other than the communication device 110 and the terminal 120 of the communication network 100. Specifically, for example, the communication control device 130 may obtain information necessary for protecting the primary system from a database (regulatory database) managed or operated by a national or regional radio regulatory agency (NRA: National Regulatory Authority). An example of a regulatory database is the Universal Licensing System (ULS) operated by the Federal Communications Commission (FCC: Federal Communications Commissions). Examples of information necessary for protecting the primary system include, for example, location information of the primary system, communication parameters of the primary system, out-of-band emission limit (OOBE (Out-of-Band Emission) Limit), adjacent channel leakage ratio (ACLR), adjacent channel selectivity, fading margin, protection ratio (PR), and the like. In regions where fixed numerical values, acquisition methods, derivation methods, etc. are prescribed by law in order to protect the primary system, it is desirable to use the information prescribed by said law as the information necessary to protect the primary system.

[0052] In addition, a database that records communication devices 110 and terminals 120 that have received compliance certification, such as the Equipment Authorization System (EAS) managed by the FCC's OET (Office of Engineering and Technology), also corresponds to a regulatory database. From such a regulatory database, it is possible to obtain information on the operable frequencies of communication devices 110 and terminals 120 and information on maximum equivalent isotropic radiated power (EIRP). Naturally, communication control device 130 may use this information to protect the primary system.

[0053] It may also be assumed that the communication control device 130 acquires radio wave sensing information from a radio wave sensing system that is installed and operated for the purpose of detecting radio waves of the primary system. As a specific example, in the U.S. Citizens Broadband Radio Service (CBRS), the communication control device 130 acquires radio wave detection information of the ship-mounted radar, which is the primary system, from a radio wave sensing system called an environmental sensing capability (ESC). In addition, when the communication device 110 or the terminal 120 has a sensing capability, the communication control device 130 may acquire radio wave detection information of the primary system from them.

[0054] The interfaces between the entities constituting this system model may be either wired or wireless. For example, the interface between the communication control device 130 and the communication device 110 may be not only a wired line, but also a wireless interface that does not depend on frequency sharing. Examples of wireless interfaces that do not depend on frequency sharing include wireless communication lines provided by mobile communication carriers via licensed bands and Wi-Fi communications that use existing license-exempt bands. <1.2 Terminology related to frequencies and sharing>

[0055] As described above, in this embodiment, a dynamic spectrum access environment is assumed. As a representative example of dynamic spectrum access, a mechanism defined by CBRS in the United States (i.e., a mechanism defined by Part 96 Citizens Broadband Radio Service of the FCC regulations in the United States) is described.

[0056] In CBRS, as shown in Figure 5, each user of the shared frequency band is classified into one of three groups. These groups are called tiers. The three groups are called the Incumbent Tier, Priority Access Tier, and General Authorized Access (GAA) Tier, respectively.

[0057] The Incumbent Tier is a group of existing users who have been using the frequency band defined as the shared frequency band. Incumbent users are generally called primary users. In CBRS, the U.S. Department of Defense (DOD), fixed satellite operators, and Grandfathered Wireless Broadband Licensees (GWBLs) are defined as existing users. The Incumbent Tier is not required to avoid interference with the Priority Access Tier and GAA Tier, which have lower priorities, nor is it required to suppress the use of the shared frequency band. In addition, the Incumbent Tier is protected from interference by the Priority Access Tier and GAA Tier. In other words, users of the Incumbent Tier can use the shared frequency band without considering the existence of other groups.

[0058] The Priority Access Tier is a group of users who use a shared frequency band based on the above-mentioned PAL (Priority Access License). Users of the Priority Access Tier are also generally called secondary users. When using a shared frequency band, the Priority Access Tier is required to avoid interference with the Incumbent Tier, which has a higher priority than the Priority Access Tier, and to suppress the use of the shared frequency band. On the other hand, the Priority Access Tier is not required to avoid interference with the GAA Tier, which has a lower priority than the Priority Access Tier, and is not required to suppress the use of the shared frequency band. In addition, the Priority Access Tier is not protected from interference by the Incumbent Tier, which has a higher priority, but is protected from interference by the GAA Tier, which has a lower priority.

[0059] The GAA Tier is a group of shared frequency band users who do not belong to the Incumbent Tier and Priority Access Tier. As with the Priority Access Tier, GAA Tier users are generally also called secondary users. However, since the priority of shared use is lower than that of the Priority Access Tier, they are also called low-priority secondary users. When using a shared frequency band, the GAA Tier is required to avoid interference with the Incumbent Tier and Priority Access Tier, which have higher priorities, and to suppress the use of the shared frequency band. In addition, the GAA Tier is not protected from interference by the Incumbent Tier and Priority Access Tier, which have higher priorities. In other words, the GAA Tier is a tier that legally requires opportunistic use of the shared frequency band.

[0060] Although the mechanism of CBRS has been described above as a representative example of dynamic frequency sharing, this embodiment is not limited to the definition of CBRS. For example, as shown in FIG. 5, CBRS generally adopts a 3-tier structure, but in this embodiment, a 2-tier structure may be adopted. Representative examples of the 2-tier structure include Authorized Shared Access (ASA), Licensed Shared Access (LSA), evolved LSA (eLSA), TVWS (TV band White Space), and the US 6 GHz band sharing. In ASA, LSA, and eLSA, there is no GAA Tier, and a structure equivalent to a combination of an Incumbent Tier and a Priority Access Tier is adopted. In addition, in TVWS and the US 6 GHz band sharing, there is no Priority Access Tier, and a structure equivalent to a combination of an Incumbent Tier and a GAA Tier is adopted. In addition, four or more Tiers may exist. Specifically, for example, four or more Tiers may be generated by providing multiple intermediate layers equivalent to the Priority Access Tier and further assigning different priorities to each intermediate layer. In addition, for example, the GAA Tier may be divided in a similar manner and the number of tiers may be increased by assigning priorities to the tiers. In other words, each group may be divided.

[0061] The primary system of this embodiment is not limited to the definition of CBRS. For example, radio systems such as TV broadcasting, fixed microwave links (FS: Fixed Systems), meteorological radar, radio altimeters, communications-based train control, and radio astronomy are considered as examples of the primary system. However, any radio system can be the primary system of this embodiment.

[0062] As described above, this embodiment is not limited to a frequency sharing environment. In general, in frequency sharing or secondary frequency usage, an existing system using the target frequency band is called a primary system, and a secondary user is called a secondary system. However, when this embodiment is applied to a non-frequency sharing environment, they should be read by replacing them with other terms. For example, a macrocell base station in a heterogeneous network (HetNet) may be the primary system, and a small cell base station or a relay station may be the secondary system. Also, a base station may be the primary system, and a Relay UE (User Equipment) or Vehicle UE that realizes D2D or V2X within its coverage may be the secondary system. The base station is not limited to a fixed type, and may be a portable or mobile type. In such a case, for example, the communication control device 130 of this embodiment may be provided in a core network, a base station, a relay station, a Relay UE, or the like.

[0063] In addition, when the present embodiment is applied to a non-frequency sharing environment, the term "frequency" in the present disclosure is replaced by another term shared in the application destination. For example, it is assumed that the term "frequency" is replaced by terms such as "resource," "resource block," "resource element," "resource pool," "channel," "component carrier," "carrier," "subcarrier," "Bandwidth Part (BWP)," or another term having an equivalent or similar meaning. <<2. Description of procedures assumed in this embodiment>>

[0064] Here, a basic procedure that can be used when implementing this embodiment will be described. Note that the description up to <2.5> below will be given assuming that the procedure is implemented mainly in the communication device 110A. <2.1 Registration Procedure>

[0065] The registration procedure is a procedure for registering information about a wireless system that is to use a shared frequency band. More specifically, it is a procedure for registering device parameters related to a communication device 110 of the wireless system in the communication control device 130. Typically, the registration procedure is started when the communication device 110 representing the wireless system that is to use the shared frequency band notifies the communication control device 130 of a registration request including the device parameters. Note that, when a wireless system that is to use the shared frequency band includes multiple communication devices 110, the device parameters of each of the multiple communication devices are included in the registration request. Also, the device that transmits the registration request on behalf of the wireless system may be determined appropriately. <2.1.1 Details of required parameters>

[0066] The device parameters refer to, for example, the following information: Information regarding the user of the communication device 110 (hereinafter referred to as user information) Information unique to the communication device 110 (hereinafter referred to as unique information) Information regarding the location of the communication device 110 (hereinafter referred to as location information) Information regarding the antenna of the communication device 110 (hereinafter referred to as antenna information) Information regarding the wireless interface of the communication device 110 (hereinafter referred to as wireless interface information) Legal information regarding the communication device 110 (hereinafter referred to as "legal information") Information regarding the installer of the communication device 110 (hereinafter referred to as installer information) Information about the group to which the communication device 110 belongs (hereinafter, group information)

[0067] The device parameters are not limited to those mentioned above. Information other than these may be treated as device parameters. The device parameters do not need to be transmitted at once, but may be transmitted in multiple parts. That is, multiple registration requests may be transmitted for one registration procedure. In this way, one procedure or one process within a procedure may be performed in multiple parts. The same applies to the procedures described below.

[0068] The user information is information related to the user of the communication device 110. For example, a user ID, an account name, a user name, a user contact information, a call sign, and the like can be assumed. The user ID and the account name may be generated by the user of the communication device 110, or may be issued in advance by the communication control device 130. It is preferable to use a call sign issued by the NRA.

[0069] The user information can be used, for example, for interference resolution. As a specific example, the communication control device 130 may determine whether to stop using a frequency currently used by the communication device 110 in the frequency use notification procedure described in <2.5> below, and may issue an instruction based on the determination of the stop of use, but may still notify a frequency use notification request for the frequency. In that case, the communication control device 130 may suspect a malfunction of the communication device 110 and may contact the user contact information included in the user information to request confirmation of the behavior of the communication device 110. This example is not limited to the above, and when it is determined that the communication device 110 is operating against the communication control performed by the communication control device 130, the communication control device 130 may contact the user using the user information.

[0070] The unique information is information capable of identifying communication device 110, product information of communication device 110, information relating to the hardware or software of communication device 110, and the like.

[0071] The information capable of identifying communication device 110 may include, for example, a manufacturing number (serial number) of communication device 110, an ID of communication device 110, etc. The ID of communication device 110 may be, for example, an ID uniquely assigned by a user of communication device 110.

[0072] The product information of the communication device 110 may include, for example, an authentication ID, a product model number, information about the manufacturer, etc. An authentication ID is an ID given by a certification body in each country or region, such as an FCC ID in the United States, a CE number in Europe, or a technical regulation conformity certificate (Giteki) in Japan. An ID issued by an industry group or the like based on its own certification program may also be considered as an authentication ID.

[0073] The unique information represented by these may be used, for example, for the purpose of a whitelist or blacklist. For example, when any information related to an operating communication device 110 is included in the blacklist, the communication control device 130 can instruct the communication device 110 to suspend frequency usage in the frequency usage notification procedure described in <2.5> below. Furthermore, the communication control device 130 can behave in such a way that it does not release the suspension of usage until the communication device 110 is removed from the blacklist. Also, for example, the communication control device 130 can refuse to register the communication device 110 included in the blacklist. Also, for example, the communication control device 130 can perform an operation such as not considering the communication device 110 corresponding to the information included in the blacklist in the interference calculation of the present disclosure, or considering only the communication device 110 corresponding to the information included in the whitelist in the interference calculation.

[0074] In the present disclosure, the FCC ID may be treated as information related to transmission power. For example, in an EAS (Equipment Authorization System) database, which is a type of regulatory database, information on certified devices can be obtained, and the API (Application Programming Interface) is also made public. For example, certified maximum EIRP information and the like may be included in the information together with the FCC ID. Since such power information is linked to the FCC ID, it is possible to treat the FCC ID as transmission power information. Similarly, the FCC ID may be treated as equivalent to other information included in the EAS. Furthermore, in the case where there is information linked to an authentication ID, not limited to the FCC ID, the authentication ID may be treated as equivalent to that information.

[0075] The information on the hardware of the communication device 110 may include, for example, transmission power class information. For example, in the U.S. FCC CFR (Code of Federal Regulations) Part 96, two types of transmission power class information, Category A and Category B, are defined, and the information on the hardware of the communication device 110 that complies with the regulations may include information on which of the two types of classes the device belongs to. In addition, several classes of eNodeB and gNodeB are defined in TS (Technical Specification) 36.104 and TS 38.104 of the 3GPP (3rd Generation Partnership Project), and these regulations may also be used.

[0076] The transmission power class information can be used, for example, for interference calculation. The interference calculation can be performed by setting the maximum transmission power defined for each class as the transmission power of the communication device 110.

[0077] The information about the software of the communication device 110 may include, for example, version information and build number of an execution program that describes the processing required for interaction with the communication control device 130. It may also include version information and build number of software for operating as the communication device 110.

[0078] Typically, the location information is information capable of identifying the location of the communication device 110. For example, the location information is coordinate information acquired by a positioning function represented by GPS (Global Positioning System), Beidou, QZSS (Quasi-Zenith Satellite System), Galileo, or A-GPS (Assisted Global Positioning System). Typically, the location information may include information related to latitude, longitude, height above ground / sea level, altitude, and positioning error. Alternatively, the location information may be, for example, location information registered in an information management device managed by the NRA (National Regulatory Authority) or an agency entrusted by the NRA. Alternatively, the location information may be, for example, coordinates of the X-axis, Y-axis, and Z-axis with a specific geographical position as the origin. In addition, together with such coordinate information, an identifier indicating whether the communication device 110 is located outdoors or indoors may be given.

[0079] Furthermore, location uncertainty may be included in the location information. For example, the location accuracy information may be provided for both or either of a horizontal plane and a vertical plane. The location uncertainty may be used as a correction value when calculating a distance to an arbitrary point, for example.

[0080] The location information may also be information indicating an area in which the communication device 110 is located. For example, information indicating an area designated by an administrative body, such as a postal code or an address, may be used. For example, an area may be indicated by a set of three or more geographic coordinates. Such information indicating an area may be provided together with the coordinate information.

[0081] Furthermore, when the communication device 110 is located indoors, information indicating the floor of the building on which the communication device 110 is located may also be included in the location information. For example, an identifier indicating a floor number, ground level, or basement may be included in the location information. Furthermore, for example, information indicating a further enclosed space indoors, such as a room number or a room name in a building, may be included in the location information.

[0082] Typically, it is desirable that the positioning function is provided by the communication device 110. However, there may be cases where the performance of the positioning function does not meet the required accuracy. In addition, even if the performance of the positioning function meets the required accuracy, depending on the installation location of the communication device 110, there may be cases where location information that meets the required accuracy cannot be obtained. Therefore, the positioning function may be provided by a device other than the communication device 110, and the communication device 110 may obtain information related to the location from that device. The device having the positioning function may be an existing device that is available, but may also be provided by the installer of the communication device 110. In such a case, it is desirable that the location information measured by the installer of the communication device 110 is written to the communication device 110.

[0083] The antenna information is typically information indicating the performance and configuration of an antenna included in the communication device 110. Typically, the information may include, for example, the antenna installation height, tilt angle (Downtilt), horizontal direction (Azimuth), boresight, antenna peak gain, and antenna model.

[0084] The antenna information may also include information regarding beams that can be formed, such as beam width, beam pattern, and analog or digital beamforming capabilities.

[0085] The antenna information may also include information on the performance and configuration of MIMO (Multiple Input Multiple Output) communication. For example, information such as the number of antenna elements and the maximum number of spatial streams may be included. In addition, information on a codebook to be used and weight matrix information may also be included. The weight matrix information may be a unitary matrix, a ZF (Zero-Forcing) matrix, an MMSE (Minimum Mean Square Error) matrix, etc., which are obtained by SVD (Singular Value Decomposition), EVD (Eigen Value Decomposition), BD (Block Diagonalization), etc. In addition, when the communication device 110 has a function such as MLD (Maximum Likelihood Detection) that requires nonlinear calculation, information indicating the function may be included in the antenna information.

[0086] The antenna information may also include ZoD (Zenith of Direction, Departure). ZoD is a type of radio wave arrival angle. Note that ZoD may not be notified from the communication device 110, but may be estimated and notified by another communication device 110 from radio waves radiated from the antenna of the communication device 110. In this case, the communication device 110 may be a device that operates as a base station or an access point, a device that performs D2D communication, or a moving relay base station. ZoD may be estimated by a radio wave arrival direction estimation technique such as MUSIC (Multiple Signal Classification) or ESPRIT (Estimation of Signal Propagation via Rotation Invariance Techniques). Furthermore, ZoD may be used by the communication control device 130 as measurement information.

[0087] The wireless interface information typically refers to information indicating a wireless interface technology that the communication device 110 has. For example, identifier information indicating a technology used in GSM, CDMA2000, UMTS, E-UTRA, E-UTRA NB-IoT, 5G NR, 5G NR NB-IoT, or a further next-generation cellular system may be included as the wireless interface information. In addition, identifier information indicating a derived technology conforming to LTE (Long Term Evolution) / 5G, such as MultiFire, LTE-U (Long Term Evolution -Unlicensed), and NR-U (NR-Unlicensed), may also be included. In addition, identifier information indicating a standard technology, such as MAN (Metropolitan Area Network) such as WiMAX and WiMAX2+, and IEEE 802.11-based wireless LAN, may also be included. In addition, identifier information indicating XGP (Extended Global Platform) and sXGP (Shared XGP) may also be included. In addition, identifier information of a communication technology for LPWA (Local Power, Wide Area) may also be included. In addition, identifier information indicating a proprietary wireless technology may also be included. Additionally, the version or release numbers of the technical specifications that define these technologies may also be included as air interface information.

[0088] The radio interface information may also include frequency band information supported by the communication device 110. For example, the frequency band information may be represented by an upper limit frequency, a lower limit frequency, a center frequency, a bandwidth, a 3GPP Operating Band number, or a combination of at least two of these. Furthermore, one or more pieces of frequency band information may be included in the radio interface information.

[0089] The frequency band information supported by the communication device 110 may further include information indicating capabilities of band extension technologies such as carrier aggregation (CA) and channel bonding. For example, information on bands that can be combined may be included. For carrier aggregation, information on bands to be used as a primary component carrier (PCC) or a secondary component carrier (SCC) may also be included. The number of component carriers that can be simultaneously aggregated (number of CCs) may also be included.

[0090] The frequency band information supported by the communication device 110 may further include information indicating a combination of frequency bands supported by Dual Connectivity and Multi Connectivity. Additionally, information on other communication devices 110 that cooperate to provide Dual Connectivity and Multi Connectivity may also be provided. In subsequent procedures, the communication control device 130 may make a decision on communication control disclosed in this embodiment, taking into account other communication devices 110 that are in a cooperative relationship.

[0091] The frequency band information supported by the communication device 110 may also include information indicating radio wave usage priority, such as PAL and GAA.

[0092] The radio interface information may also include modulation scheme information supported by the communication device 110. For example, representative examples include information indicating a primary modulation scheme such as FSK (Frequency Shift Keying), n-ary PSK (Phase Shift Keying, where n is a power of 2 such as 2, 4, 8, etc.), and n-ary QAM (Quadrature Amplitude Modulation, where n is a power of 4 such as 4, 16, 64, 256, 1024, etc.). Also, information indicating a secondary modulation scheme such as OFDM (Orthogonal Frequency Division Multiplexing), Scalable OFDM, DFT-s-OFDM (DFT spread OFDM), GFDM (Generalized Frequency Division Multiplexing), and FBMC (Filter Bank Multi Carrier) may be included.

[0093] The radio interface information may also include information about error correction codes, such as capabilities of Turbo codes, LDPC (Low Density Parity Check) codes, Polar codes, erasure correction codes, and the like, and information about the coding rate to be applied.

[0094] As another aspect, the modulation scheme information and the information on the error correction code can also be expressed as an MCS (Modulation and Coding Scheme) index.

[0095] The radio interface information may also include information indicating functions specific to each wireless technology specification supported by the communication device 110. For example, a representative example is Transmission Mode (TM) information defined in LTE. In addition, for specific functions having two or more modes, the radio interface information may include TM information. Furthermore, in the case where the communication device 110 supports a function that is not essential to the specification even if two or more modes are not present in the technology specification, information indicating the supported function may also be included.

[0096] The radio interface information may also include radio access technology (RAT) information supported by the communication device 110. For example, information indicating time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), power division multiple access (PDMA), code division multiple access (CDMA), sparse code multiple access (SCMA), interleave division multiple access (IDMA), spatial division multiple access (SDMA), carrier sense multiple access / collision avoidance (CSMA / CA), carrier sense multiple access / collision detection (CSMA / CD), etc. may be included. Note that TDMA, FDMA, and OFDMA are classified as orthogonal multiple access (OMA). PDMA, CDMA, SCMA, IDMA, and SDMA are classified as non-orthogonal multiple access (NOMA). A typical example of PDMA is a method realized by combining Superposition Coding (SPC) and Successive Interference Canceller (SIC). CSMA / CA and CSMA / CD are classified as opportunistic access methods.

[0097] When the radio interface information includes information indicating an opportunistic access method, the radio interface information may further include information indicating details of the access method. As a specific example, the radio interface information may include information indicating whether the access method is Frame Based Equipment (FBE) or Load Based Equipment (LBE) defined in ETSI EN 301 598.

[0098] When the air interface information indicates LBE, it may further include information specific to LBE, such as Priority Class defined in ETSI EN 301 598.

[0099] The radio interface information may also include information related to a duplex mode supported by the communication device 110. As a representative example, information related to a method such as FDD (Frequency Division Duplex), TDD (Time Division Duplex), and FD (Full Duplex) may be included.

[0100] When TDD is included as the radio interface information, it may include TDD Frame Structure information used or supported by the communication device 110. Also, information related to a duplex mode may be included for each frequency band indicated by the frequency band information.

[0101] When the FD is included as the radio interface information, information on the interference power detection level may be included.

[0102] The radio interface information may also include information regarding a transmit diversity technique supported by the communication device 110. For example, Space Time Coding (STC) may be included.

[0103] The radio interface information may also include guard band information. For example, the radio interface information may include information about a guard band size that is predetermined for the radio interface. Alternatively, the radio interface information may include information about a guard band size that is desired by the communication device 110.

[0104] Regardless of the above aspect, the radio interface information may be provided for each frequency band.

[0105] The legal information typically refers to information on regulations that the communication device 110 must comply with, which are determined by the radio wave administrative agency or an equivalent agency of each country or region, and certification information acquired by the communication device 110. The regulatory information typically includes, for example, information on the upper limit of out-of-band emission and information on the blocking characteristics of the receiver. The certification information typically includes, for example, type approval information and legal information that is the standard for obtaining certification. Examples of type approval information include, for example, an FCC ID in the United States and a technical regulation conformity certificate in Japan. Examples of legal information include, for example, an FCC regulation number in the United States and an ETSI Harmonized Standard number in Europe.

[0106] Of the legal information, numerical values ​​may be substituted by those specified in the specifications of the radio interface technology. Examples of the specifications of the radio interface technology include 3GPP TS 36.104 and TS 38.104. These specifications specify the adjacent channel leakage ratio (ACLR). Instead of the upper limit value information of the out-of-band radiation, the ACLR specified in the specifications may be used to derive and use the upper limit value of the out-of-band radiation. Furthermore, the ACLR itself may be used as necessary. Furthermore, the adjacent channel selectivity (ACS) may be used instead of the blocking characteristic. Furthermore, these may be used in combination, or the adjacent channel interference ratio (ACIR) may be used. In general, the ACIR has the following relationship with the ACLR and ACS.

number

[0107] The installer information may include information capable of identifying the person (installer) who installed the communication device 110, unique information linked to the installer, and the like. Typically, the installer information may include information on an individual who is responsible for the location information of the communication device 110, called a Certified Professional Installer (CPI) defined in Non-Patent Document 3. The CPI discloses a Certified Professional Installer Registration ID (CPIR-ID) and a CPI name. In addition, as unique information linked to the CPI, for example, a mailing address or contact address, an email address, a telephone number, a public key identifier (PKI), and the like are disclosed. Not limited to these, other information related to the installer may be included in the installer information as necessary.

[0108] The group information may include information about a communication device group to which the communication device 110 belongs. Specifically, for example, information about groups of the same or similar types as those disclosed in WINNF-SSC-0010 may be included. Also, for example, if a communication carrier manages communication devices 110 on a group basis according to its own operation policy, information about the groups may be included in the group information.

[0109] The information listed up to this point may not be provided by the communication device 110 to the communication control device 130, but may be inferred by the communication control device 130 from other information provided by the communication device 110. Specifically, for example, the guard band information can be inferred from the radio interface information. When the radio interface used by the communication device 110 is E-UTRA or 5G NR, the guard band information can be inferred based on the E-UTRA transmission bandwidth specification described in TS36.104 of 3GPP shown in FIG. 6, the 5G NR transmission bandwidth specification described in TS38.104 of 3GPP shown in FIG. 7, and the table described in TS38.104 shown below. [Table 1] [Table 2] [Table 3] [Table 4]

[0110] In other words, it is sufficient that the communication control device 130 can acquire the information listed above, and the communication device 110 does not necessarily need to provide the information to the communication control device 130. Also, the intermediate device 130B (e.g., a network manager) that bundles multiple communication devices 110 does not necessarily need to provide the information to the communication control device 130A. Providing information to the communication control device 130 or 130A by the communication device 110 or intermediate device 130B is merely one means of providing information in this embodiment. The information listed above means information that may be necessary for the communication control device 130 to normally complete this procedure, and the means of providing the information does not matter. For example, WINNF-TS-0061 allows such a method, calling it Multi-Step Registration.

[0111] Naturally, the information listed above can be selectively applied depending on the legal system and technical specifications of the region. <2.1.1.1 Supplementary information on required parameters>

[0112] In the registration procedure, it is assumed that in some cases, device parameters related to not only the communication device 110 but also the terminal 120 may be required to be registered in the communication control device 130. In such a case, the term "communication device" in the description given in <2.1.1> may be replaced with "terminal" or a term equivalent thereto. In addition, parameters specific to the "terminal" that are not mentioned in <2.1.1> may also be treated as required parameters in the registration procedure. For example, UE (User Equipment) Category defined by 3GPP may be mentioned. <2.1.2 Details of registration process>

[0113] As described above, the communication device 110) representing a wireless system that wishes to use the shared frequency band generates a registration request including device parameters and notifies the communication control device 130 of the request.

[0114] Here, when the device parameters include installer information, the communication device 110 may use the installer information to perform processing to prevent tampering on the registration request. In addition, encryption processing may be performed on a part or all of the information included in the registration request. Specifically, for example, a unique public key may be shared in advance between the communication device 110 and the communication control device 130, and the communication device 110 may encrypt information using a private key corresponding to the public key. For example, information that is sensitive in terms of crime prevention, such as location information, may be encrypted.

[0115] It is possible that the ID and location information of the communication device 110 are made public, and the communication control device 130 holds in advance the ID and location information of the main communication device 110 that exists within its coverage. In such a case, the communication control device 130 can acquire the location information from the ID of the communication device 110 that transmitted the registration request, so there is no need for the location information to be included in the registration request. It is also possible that the communication control device 130 replies with the necessary device parameters to the communication device 110 that transmitted the registration request, and in response, the communication device 110 transmits a registration request including the device parameters necessary for registration. In this way, the information included in the registration request may differ depending on the case.

[0116] After receiving the registration request, the communication control device 130 performs registration processing for the communication device 110 and returns a registration response according to the processing result. If there is no lack of information required for registration or if there is an abnormality, the communication control device 130 records the information in an internal or external storage device and notifies the normal completion. Otherwise, it notifies the registration failure. If the registration is completed normally, the communication control device 130 may assign an ID to the communication device 110 individually and notify the ID information in the response. If the registration fails, the communication device 110 may re-notify the modified registration request. Furthermore, the communication device 110 may modify the registration request and try the registration procedure until it is completed normally.

[0117] The registration procedure may be executed even after the registration is normally completed. Specifically, the registration procedure may be executed again when the location information changes beyond a predetermined standard due to, for example, movement, accuracy improvement, etc. The predetermined standard is typically determined by the legal system of each country or region. For example, in the United States, 47 CFR Part 15, a Mode II personal / portable white space device, that is, a device using an open frequency, is required to register again if its location changes by 100 meters or more. <2.2 Available Spectrum Query Procedure>

[0118] The available frequency information inquiry procedure is a procedure in which a wireless system that intends to use a shared frequency band inquires of the communication control device 130 about information on available frequencies. It is not necessary to execute the available frequency information inquiry procedure. The communication device 110 that makes the inquiry on behalf of the wireless system that intends to use the shared frequency band may be the same as or different from the communication device 110 that generated the registration request. Typically, the procedure is started when the communication device 110 making the inquiry notifies the communication control device 130 of an inquiry request including information that can identify the communication device 110.

[0119] Here, the available frequency information typically refers to information indicating frequencies that can be safely used for secondary purposes by the communication device 110 without causing fatal interference to the primary system.

[0120] The available frequency information is determined based on, for example, a secondary use prohibited area called an Exclusion Zone. Specifically, for example, when the communication device 110 is installed in a secondary use prohibited area that is provided for the purpose of protecting a primary system that uses frequency channel F1, the frequency channel F1 is not notified to the communication device 110 as an available channel.

[0121] The available frequency information may be determined, for example, by the degree of interference with the primary system. Specifically, even if a frequency channel is outside the secondary use prohibited area, if it is determined that the frequency channel causes fatal interference with the primary system, the frequency channel may not be notified as an available channel. An example of a specific calculation method is described later in <2.2.2>.

[0122] Also, as described above, there may be frequency channels that are not notified as available due to conditions other than the primary system protection requirements. Specifically, for example, in order to avoid possible interference between communication devices 110 in advance, a frequency channel that is being used by another communication device 110 existing in the vicinity of the communication device 110 may not be notified as an available channel. In this way, available frequency information that is set in consideration of interference with other communication devices 110 may be set as, for example, "recommended use frequency information" and provided together with the available frequency information. In other words, it is desirable that the "recommended use frequency information" be a subset of the available frequency information.

[0123] Even if it would have an effect on the primary system, if the effect can be avoided by reducing the transmission power, the same frequency as that of the primary system or nearby communication device 110 may be notified as an available channel. In such a case, the maximum allowable transmission power information is typically included in the available frequency information. The maximum allowable transmission power is typically expressed in EIRP. It is not necessarily limited to this, and may be provided as a combination of conducted power and antenna gain, for example. Furthermore, the allowable peak gain may be set for the antenna gain for each spatial direction. <2.2.1 Details of required parameters>

[0124] The information capable of identifying a wireless system that is attempting to use a shared frequency band may be, for example, unique information registered during the registration procedure, the above-mentioned ID information, or the like.

[0125] The inquiry request may also include inquiry requirement information. The inquiry requirement information may include, for example, information indicating a frequency band for which availability is desired. The inquiry requirement information may also include, for example, transmission power information. The communication device 110 making the inquiry may include transmission power information when, for example, it only wants to know frequency information for which a desired transmission power can be used. The inquiry requirement information does not necessarily need to be included in the inquiry request.

[0126] The inquiry request may also include a measurement report. The measurement report includes the results of measurements performed by the communication device 110 and / or the terminal 120. A part or all of the measurement results may be represented as raw data or processed data. For example, standardized metrics such as RSRP (Reference Signal Received Power), RSSI (Reference Signal Strength Indicator), and RSRQ (Reference Signal Received Quality) may be used for the measurements. <2.2.2 Details of available frequency evaluation process>

[0127] After receiving the inquiry request, the available frequencies are evaluated based on the inquiry requirement information. For example, as described above, the available frequencies can be evaluated taking into consideration the primary system, its secondary use prohibited areas, and the presence of nearby communication devices 110.

[0128] The communication control device may derive the secondary use prohibited area. For example, the maximum transmission power P MaxTx(dBm) and the minimum transmission power P MinTx(dBm) is specified, it is possible to determine the secondary use prohibited area by calculating the range of separation distance between the primary system and the secondary system using the following formula:

number

[0129] The maximum allowable transmission power information may be derived. Typically, the maximum allowable transmission power information is calculated using allowable interference power information in the primary system or its protection zone, position information of a reference point for calculating the interference power level suffered by the primary system, registration information of the communication device 110, and a propagation loss estimation model. Specifically, as an example, the maximum allowable transmission power information is calculated by the following formula.

number

[0130] Furthermore, formula (2) is written based on the assumption that a single communication device 110 is the interference source (single station interference). For example, when aggregated interference from multiple communication devices 110 must be considered at the same time, a correction value may be added. Specifically, for example, the correction value may be determined based on the three types of interference margin methods (Fixed / Predetermined, Flexible, Flexible Minimized) disclosed in Non-Patent Document 4 (ECC Report 186).

[0131] As shown in formula (2), the tolerable interference power information itself is not necessarily directly usable. For example, when the required signal power to interference power ratio (SIR), SINR (Signal to Interference Plus Noise Ratio), etc. of the primary system are usable, they may be converted into the tolerable interference power and used. Such conversion processing is not limited to this processing, and may also be applied to processing of other procedures.

[0132] Although the formula (2) is expressed using logarithms, it may be converted to antilogarithms in practice. Furthermore, all parameters expressed in logarithms in the present disclosure may be converted to antilogarithms as appropriate.

[0133] In addition, when the aforementioned transmission power information is included in the inquiry requirement information, it is possible to evaluate the available frequency by a method other than the aforementioned method. Specifically, for example, assuming that the desired transmission power indicated by the transmission power information is used, when the estimated interference amount is below the allowable interference power in the primary system or its protection zone, the frequency channel is determined to be available and notified to the communication device 110.

[0134] Also, for example, in the case where an area or space in which communication device 110 can use a shared frequency band is predetermined, similar to an area of ​​a REM (Radio Environment Map), available frequency information may be derived based only on coordinates (X-axis, Y-axis, and Z-axis coordinates or latitude, longitude, and height above ground of communication device 110) included in location information of communication device 110. Also, for example, even in the case where a lookup table that associates the location coordinates of communication device 110 with available frequency information is prepared, the available frequency information may be derived based only on the location information of communication device 110. In this way, there are various methods for determining available frequencies, and they are not limited to the examples of the present disclosure.

[0135] In addition, when the communication control device 130 acquires information on the capabilities of bandwidth extension technologies such as Carrier Aggregation (CA) and Channel Bonding as frequency band information supported by the communication device 110, the communication control device 130 may include available combinations, recommended combinations, etc. of these in the available frequency information.

[0136] In addition, when the communication control device 130 acquires information on the combination of frequency bands supported for Dual Connectivity and Multi Connectivity as frequency band information supported by the communication device 110, the communication control device 130 may include information such as available frequencies and recommended frequencies for Dual Connectivity and Multi Connectivity in the available frequency information.

[0137] Furthermore, when providing available frequency information for the above-mentioned band extension technology, if an imbalance in maximum allowable transmission power occurs among multiple frequency channels, the available frequency information may be provided after adjusting the maximum allowable transmission power of each frequency channel. For example, from the viewpoint of protecting the primary system, the maximum allowable transmission power of each frequency channel may be adjusted to the maximum allowable transmission power of a frequency channel with a low maximum allowable power flux density (PSD: Power Spectral Density).

[0138] The evaluation of available frequencies does not necessarily have to be performed after receiving an inquiry request. For example, the evaluation may be performed by the communication control device 130 independently without an inquiry request after the above-mentioned registration procedure is normally completed. In such a case, the REM or lookup table shown as an example above, or an information table similar thereto, may be created.

[0139] Also, the radio wave usage priority such as PAL and GAA may be evaluated. For example, when the registered device parameters or the inquiry requirements include information on the radio wave usage priority, it may be determined whether the frequency usage is possible based on the priority and notified. Also, for example, as disclosed in Non-Patent Document 3, when information (called Cluster List in Non-Patent Document 3) on the communication device 110 that performs high priority usage (for example, PAL) is registered in advance by the user in the communication control device 130, the evaluation may be performed based on the information.

[0140] After completing the evaluation of the available frequencies, the communication control device 130 notifies the communication device 110 of the evaluation result.

[0141] The communication device 110 may use the evaluation results received from the communication control device 130 to select desired communication parameters. <2.3 Spectrum Grant Procedure>

[0142] The frequency use permission procedure is a procedure for a wireless system that wishes to use a shared frequency band to receive secondary permission to use the frequency from the communication control device 130. The communication device 110 that performs the frequency use permission procedure on behalf of the wireless system may be the same as or different from the communication device 110 that performed the previous procedures. Typically, the procedure is started when the communication device 110 notifies the communication control device 130 of a frequency use permission request that includes information that can identify the communication device 110. As described above, the available frequency information inquiry procedure is not essential. Therefore, the frequency use permission procedure may be performed after the available frequency information inquiry procedure or after the registration procedure.

[0143] In this embodiment, it is assumed that at least the following two types of frequency use permission request methods can be used. ·Designation method Flexible method

[0144] The designation method is a request method in which the communication device 110 designates desired communication parameters and requests the communication control device 130 for permission to operate based on the desired communication parameters. The desired communication parameters include, but are not limited to, a desired frequency channel and maximum transmission power. For example, parameters specific to a wireless interface technology (such as a modulation method or a duplex mode) may be designated. Information indicating radio wave utilization priority, such as PAL or GAA, may also be included.

[0145] The flexible method is a request method in which the communication device 110 specifies only requirements related to communication parameters and requests the communication control device 130 to specify communication parameters that satisfy the requirements and allow secondary use. Requirements related to communication parameters include, but are not limited to, bandwidth, desired maximum transmission power, and desired minimum transmission power. For example, parameters specific to the wireless interface technology (such as modulation method and duplex mode) may be specified. Specifically, for example, one or more of the TDD Frame Structures may be selected in advance and notified.

[0146] Similar to the inquiry request, the frequency use permission request may also include a measurement report, regardless of whether the frequency use permission request is in the designated method or the flexible method. The measurement report includes the result of the measurement performed by the communication device 110 and / or the terminal 120. The measurement may be represented by raw data or processed data. For example, standardized metrics such as RSRP (Reference Signal Received Power), RSSI (Reference Signal Strength Indicator), and RSRQ (Reference Signal Received Quality) may be used for the measurement.

[0147] The method information used by the communication device 110 may be registered in the communication control device 130 during the registration procedure described in <2.1>. <2.3.1 Details of frequency usage permission processing>

[0148] After receiving the frequency use permission request, the communication control device 130 performs frequency use permission processing based on the frequency use permission request method. For example, it is possible to perform frequency use permission processing by taking into consideration the primary system, secondary use prohibited areas, the presence of nearby communication devices 110, etc., using the method described in <2.2>.

[0149] When the flexible method is used, the maximum allowable transmission power information may be derived using the method described in <2.2.2>. Typically, the maximum allowable transmission power information is calculated using tolerable interference power information in the primary system or its protection zone, position information of a reference point for calculating the interference power level suffered by the primary system, registration information of the communication device 110, and a propagation loss estimation model. Specifically, as an example, the maximum allowable transmission power information is calculated by the above formula (2).

[0150] As described above, formula (2) is written based on the assumption that a single communication device 110 is an interference source. For example, when aggregated interference from multiple communication devices 110 must be considered at the same time, a correction value may be added. Specifically, the correction value may be determined based on three types of methods (Fixed / Predetermined, Flexible, Flexible Minimized) disclosed in Non-Patent Document 4 (ECC Report 186).

[0151] The communication control device 130 can use various propagation loss estimation models in the frequency use permission procedure, available frequency evaluation processing for available frequency information inquiry requests, etc. When a model is specified for each application, it is desirable to use the specified model. For example, in Non-Patent Document 3 (WINNF-TS-0112), propagation loss models such as Extended Hata (eHATA) and Irregular Terrain Model (ITM) are adopted for each application. Naturally, the propagation loss models are not limited to these.

[0152] There are also propagation loss estimation models that require information about radio wave propagation paths. The information about radio wave propagation paths may include, for example, information indicating line of sight (LOS: Line of Sight and / or NLOS: Non Line of Sight), topographical information (e.g., undulations, altitude above sea level), and environmental information (urban, suburban, rural, open sky, etc.). When using a propagation loss estimation model, the communication control device 130 may estimate such information from already acquired registration information of the communication device 110 and information about the primary system. Alternatively, if there are parameters designated in advance, it is desirable to use the parameters.

[0153] In a given application, when a propagation loss estimation model is not specified, the propagation loss estimation model may be used as necessary. For example, when estimating the interference power to other communication devices 110, a model that calculates a small loss such as a free space loss model is used, but when estimating the coverage of the communication device 110, a model that calculates a large loss is used.

[0154] In addition, when the designated propagation loss estimation model is used, it is possible to perform frequency usage permission processing by evaluating the risk of interference, for example. Specifically, for example, assuming that the desired transmission power indicated by the transmission power information is used, when the estimated interference amount is below the allowable interference power in the primary system or its protection zone, it is determined that the use of the frequency channel is permitted, and this is notified to the communication device 110.

[0155] In both the designated method and the flexible method, radio wave usage priority such as PAL or GAA may be evaluated as in the case of an inquiry request. For example, when the registered device parameters or the inquiry requirements include information on radio wave usage priority, it may be determined whether or not frequency usage is possible based on the priority and notified. Also, for example, when information on the communication device 110 that performs high priority usage (e.g., PAL) is registered in advance by the user in the communication control device 130, evaluation may be performed based on that information. For example, in Non-Patent Document 3 (WINNF-TS-0112), information on the communication device 110 is called a Cluster List.

[0156] In addition, in any of the above calculations, when using location information of the communication device, location uncertainty may be used to determine frequency availability by correcting the location information or coverage.

[0157] The frequency use permission process does not necessarily have to be performed in response to the reception of a frequency use permission request. For example, the communication control device 130 may perform the frequency use permission process independently without a frequency use permission request after the above-mentioned registration procedure is normally completed. Also, for example, the frequency use permission process may be performed at regular intervals. In such a case, the above-mentioned REM, lookup table, or an information table similar thereto may be created. This allows the communication control device 130 to quickly return a response after receiving a frequency use permission request, since permissible frequencies can be identified using only the location information. <2.4 Spectrum Use Notification / Heartbeat>

[0158] The frequency usage notification is a procedure in which a wireless system using a shared frequency band notifies the communication control device 130 of the use of the frequency based on the communication parameters approved for use in the frequency usage permission procedure. The communication device 110 that performs the frequency usage notification on behalf of the wireless system may be the same as or different from the communication device 110 that performed the previous procedures. Typically, the communication device 110 notifies the communication control device 130 of a notification message including information that can identify the communication device 110.

[0159] It is desirable that the frequency usage notification be performed periodically until the use of the frequency is rejected by the communication control device 130. In this case, the frequency usage notification is also called a heartbeat.

[0160] After receiving the frequency usage notification, the communication control device 130 may determine whether or not to start or continue frequency usage (in other words, radio wave transmission at the permitted frequency). For example, a method of determination may be checking frequency usage information of the primary system. Specifically, it is possible to determine whether to permit or deny the start or continuation of frequency usage (radio wave transmission at the permitted frequency) based on a change in the frequency used by the primary system, a change in the frequency usage status of a primary system that does not use radio waves regularly (for example, a ship-based radar of the CBRS in the United States), and the like. If the start or continuation is permitted, the communication device 110 may start or continue frequency usage (radio wave transmission at the permitted frequency).

[0161] After receiving the frequency usage notification, the communication control device 130 may command the communication device 110 to reconfigure the communication parameters. Typically, the command to reconfigure the communication parameters may be issued in the response of the communication control device 130 to the frequency usage notification. For example, information on recommended communication parameters (hereinafter, recommended communication parameter information) may be provided. It is desirable that the communication device 110 that has been provided with the recommended communication parameter information performs the frequency use permission procedure described in <2.4> again using the recommended communication parameter information. <2.5 Supplementary information on procedures>

[0162] As will be described later, the above procedures do not necessarily need to be implemented individually. For example, the two different procedures may be realized by substituting a third procedure having the roles of the two different procedures. Specifically, for example, a registration request and an available frequency information inquiry request may be notified integrally. Also, for example, a frequency use permission procedure and a frequency use notification may be performed integrally. Naturally, the present invention is not limited to these combinations, and three or more procedures may be performed integrally. Also, as described above, one procedure may be performed in multiple separate steps.

[0163] In addition, the expression "obtain" or an equivalent expression in this disclosure does not necessarily mean to obtain according to the procedure described in this disclosure. For example, although it is described that the location information of the communication device 110 is used in the available frequency evaluation process, it does not necessarily mean that the information obtained in the registration procedure is used, and if the location information is included in the available frequency inquiry procedure request, that location information may be used. In other words, the procedure for obtaining described in this disclosure is one example, and obtaining by other procedures is also allowed within the scope of this disclosure and within the scope of technical feasibility.

[0164] Furthermore, the information described as being included in the response from the communication control device 130 to the communication device 110 may be actively notified by the communication control device 130 in a push manner, if possible. As a specific example, available frequency information, recommended communication parameter information, radio wave transmission continuation refusal notification, and the like may be notified by a push manner. <2.6 Terminal-related procedures>

[0165] Up to this point, the description has been given mainly on the assumption that the communication device 110A performs the processing. However, depending on the embodiment, not only the communication device 110A but also the terminal 120 and the communication device 110B may operate under the management of the communication control device 130. That is, a scenario is assumed in which communication parameters are determined by the communication control device 130. Even in such a case, it is basically possible to use each procedure described in <2.1> to <2.4>. However, unlike the communication device 110A, the terminal 120 and the communication device 110B must use a frequency managed by the communication control device 130 for the backhaul link, and cannot transmit radio waves on their own. For this reason, it is desirable to start backhaul communication for the purpose of accessing the communication control device 130 only after detecting radio waves or an authorization signal transmitted by the communication device 110A (the communication device 110 capable of providing a wireless communication service, or the master communication device 110 in a master-slave type).

[0166] On the other hand, being under the management of the communication control device 130, the terminal and the communication device 110B may also have permissible communication parameters set for the purpose of protecting the primary system. However, the communication control device 130 cannot know the location information of these devices in advance. In addition, it is highly likely that these devices have mobility. In other words, the location information is dynamically updated. Depending on the legal system, if the location information changes by a certain amount or more, re-registration to the communication control device 130 may be required.

[0167] Taking into account such diverse usage patterns and operation patterns of terminals 120 and communication devices 110, the TVWS operation pattern (Non-Patent Document 5) defined by the UK Office of Communication (Ofcom) prescribes the following two types of communication parameters: ·Generic Operational Parameters Specific Operational Parameters

[0168] Generic operational parameters are communication parameters defined as "parameters that can be used by any slave WSD located within the coverage area of ​​a specific master WSD (corresponding to the communication device 110)" in Non-Patent Document 5. A feature of these parameters is that they are calculated by the WSDB without using the location information of the slave WSD.

[0169] The generic operational parameters can be provided by unicast or broadcast from the communication device 110 that has already been permitted to transmit radio waves by the communication control device 130. For example, a broadcast signal such as a Contact Verification Signal (CVS) defined in Part 15 Subpart H of the FCC rules in the United States can be used. Alternatively, the generic operational parameters may be provided by a broadcast signal specific to the wireless interface. This allows the terminal 120 and the communication device 110B to handle the generic operational parameters as communication parameters used for radio wave transmission for the purpose of accessing the communication control device 130.

[0170] Specific operational parameters are communication parameters defined in Non-Patent Document 5 as "parameters that a specific slave WSD (White Space Device) can use." In other words, they are communication parameters calculated using device parameters of the slave WSD corresponding to the terminal 120. A feature of these parameters is that they are calculated by a White Space Database (WSDB) using location information of the slave WSD. <2.7 Procedures occurring between communication control devices> <2.7.1 Information Exchange>

[0171] The communication control device 130 can exchange management information with other communication control devices 130. It is desirable to exchange at least the following information: Information related to the communication device 110 Area Information Protected system information

[0172] The information related to the communication device 110 includes at least registration information and communication parameter information of the communication device 110 operating under permission of the communication control device 130. Registration information of the communication device 110 that does not have permitted communication parameters may also be included.

[0173] The registration information of the communication device 110 typically refers to the device parameters of the communication device 110 that are registered in the communication control device 130 in the above-mentioned registration procedure. It is not necessary to exchange all registered information. For example, information that may be personal information does not need to be exchanged. In addition, when exchanging the registration information of the communication device 110, the registration information may be encrypted and exchanged, or the registration information may be exchanged after obfuscating the contents of the registration information. For example, information converted into a binary value or information signed using a digital signature mechanism may be exchanged.

[0174] The communication parameter information of the communication device 110 is typically information related to communication parameters currently being used by the communication device 110. It is desirable to include at least information indicating the frequency to be used and the transmission power. Other communication parameters may also be included.

[0175] Area information is typically information that indicates a specific geographical area, and may include area information with various attributes in various forms.

[0176] For example, like the PAL Protection Area (PPA) disclosed in Non-Patent Document 3 (WINNF-TS-0112), the area information may include protection area information of the communication device 110 that is a high-priority secondary system. In this case, the area information may be expressed, for example, as a set of three or more coordinates indicating a geographical position. Also, for example, when multiple communication control devices 130 can refer to a common external database, the area information may be expressed by a unique ID, and the actual geographical area may be referred to from the external database using the ID.

[0177] Also, for example, information indicating the coverage of the communication device 110 may be included. In this case, the area information may also be expressed, for example, as a set of three or more coordinates indicating a geographical position. Also, for example, assuming that the coverage is a circle centered on the geographical position of the communication device 110, it may also be expressed as information indicating the size of the radius. Also, for example, when a plurality of communication control devices 130 can refer to a common external database that records area information, the information indicating the coverage may be expressed by a unique ID, and the actual coverage may be referred to from the external database using the ID.

[0178] As another aspect, information related to an area section predetermined by the government or the like may also be included. Specifically, for example, a certain area can be indicated by indicating an address. For example, license areas and the like can also be expressed in a similar manner.

[0179] As another embodiment, the area information does not necessarily have to represent a planar area, but may represent a three-dimensional space. For example, it may be represented using a spatial coordinate system. Also, information indicating a predetermined closed space, such as a floor number, a room number, or the like, may be used.

[0180] The protected system information is information on a wireless system that is treated as a protected object, such as the incumbent tier described above. For example, a situation in which this information needs to be exchanged is one in which cross-border coordination is required. It is quite conceivable that different protected objects exist in the same band between neighboring countries or regions. In such a case, the protected system information can be exchanged between communication control devices 130 belonging to different countries or regions as necessary.

[0181] In another embodiment, the protected system information may include information on the secondary licensee and information on the wireless system operated by the secondary licensee. The secondary licensee is specifically a lessee of a license, and it is assumed that, for example, the secondary licensee rents a PAL from the owner and operates the wireless system owned by the secondary licensee. When the communication control device 130 independently manages the rental, it may exchange information on the secondary licensee and information on the wireless system operated by the secondary licensee with other communication control devices for the purpose of protection.

[0182] This information can be exchanged between the communication control devices 130 regardless of the decision-making topology applied to the communication control devices 130 .

[0183] This information can be exchanged in a variety of ways, some of which are shown below: ·ID specification method ·Period specification method ·Area specification method Dump method

[0184] The ID designation method is a method of acquiring information corresponding to an ID, which is given in advance to identify information managed by the communication control device 130. For example, assume that the first communication control device 130 manages a communication device 110 with ID:AAA. In this case, the second communication control device 130 issues an information acquisition request to the first communication control device 130, designating ID:AAA. After receiving the request, the first communication control device 130 searches for information on ID:AAA, and notifies information on the communication device 110 with ID:AAA, such as registration information and communication parameter information, in a response.

[0185] The period designation method is a method in which information that satisfies a predetermined condition can be exchanged during a specified period.

[0186] The predetermined condition may be, for example, whether or not information has been updated. For example, when the request specifies acquisition of information related to communication device 110 during a specific period, the response may notify registration information of communication device 110 that has been newly registered during the specific period. In addition, the response may also notify registration information or communication parameter information of communication device 110 whose communication parameters have been changed during the specific period.

[0187] An example of the predetermined condition is whether or not it has been recorded by the communication control device 130. For example, when acquisition of information related to the communication device 110 during a specific period is specified in a request, the registration information or communication parameter information recorded by the communication control device 130 during that period may be notified in a response. When the information has been updated during that period, the latest information during that period may be notified. Alternatively, an update history may be notified for each piece of information.

[0188] In the area designation method, a specific area is designated, and information on communication devices 110 belonging to the area is exchanged. For example, when acquisition of information on communication devices 110 in a specific area is designated in a request, registration information or communication parameter information on communication devices 110 installed in the area may be notified in a response.

[0189] The dump method is a method for providing all information recorded by the communication control device 130. It is desirable to provide at least the information related to the communication device 110 and the area information by the dump method.

[0190] The above explanation of information exchange between communication control devices 130 is based on the pull method. That is, the response is information corresponding to parameters specified in a request, and as an example, this can be realized by the HTTP GET method. However, this is not limited to the pull method, and information may be actively provided to other communication control devices 130 by the push method. As an example, the push method can be realized by the HTTP POST method. <2.7.2 Order and request procedures>

[0191] The communication control devices 130 may execute commands or requests to each other. Specifically, as one example, reconfiguration of communication parameters of the communication devices 110 may be given. For example, when it is determined that the first communication device 110 managed by the first communication control device 130 is receiving a large amount of interference from the second communication device 110 managed by the second communication control device 130, the first communication control device 130 may request the second communication control device 130 to change the communication parameters of the second communication device 110.

[0192] Another example is reconfiguration of area information. For example, when an error is found in the calculation of coverage information or protection area information related to the second communication device 110 managed by the second communication control device 130, the first communication control device 130 may request the second communication control device 130 to reconfigure the area information. In addition, a request to reconfigure the area information may be made for various other reasons. <2.8 Means of information transmission>

[0193] The signaling between the entities described above can be achieved via various mediums, and will be described in the context of E-UTRA or 5G NR, although the implementation is of course not limited thereto. <2.8.2 Signaling between the communication control device 130 and the communication device 110>

[0194] The notification from the communication device 110 to the communication control device 130 may be performed, for example, in the application layer. For example, it may be performed using HTTP (Hyper Text Transfer Protocol). Signaling can be performed by describing required parameters in the HTTP message body according to a predetermined format. Furthermore, when HTTP is used, the notification from the communication control device 130 to the communication device 110 is also performed according to the mechanism of the HTTP response. <2.8.3 Signaling between communication device 110 and terminal 120>

[0195] The notification from the communication device 110 to the terminal 120 may be performed using, for example, at least one of Radio Resource Control (RRC) signaling, System Information (SI), and Downlink Control Information (DCI). In addition, the downlink physical channel may be a Physical Downlink Control Channel (PDCCH), a Physical Downlink Shared Channel (PDSCH), a Physical Broadcast Channel (PBCH), an NR-PDCCH, an NR-PDSCH, or an NR-PBCH, and may be performed using at least one of these.

[0196] The notification from the terminal 120 to the communication device 110 may be performed, for example, by using RRC (Radio Resource Control) signaling or uplink control information (UCI, Uplink Control Information).Also, the notification may be performed by using uplink physical channels (PUCCH: Physical Uplink Control Channel, PUSCH: Physical Uplink Shared Channel, PRACH: Physical Random Access Channel).

[0197] Signaling may be performed not only in the physical layer but also in a higher layer. For example, when performing signaling in the application layer, the signaling may be performed by describing required parameters in the HTTP message body according to a predetermined format. 2.8.4 Signaling between terminals 120

[0198] FIG. 8 shows an example of a signaling flow assuming D2D (Device-to-Device) or V2X (Vehicle-to-Everything) as communication between terminals 120 as communication of the secondary system. D2D or V2X as communication between terminals 120 may be implemented using a physical sidelink channel (PSCCH: Physical Sidelink Control Channel, PSSCH: Physical Sidelink Shared Channel, PSBCH: Physical Sidelink Broadcast Channel). The communication control device 130 calculates communication parameters to be used by the secondary system (T101) and notifies the communication device 110 of the secondary system (T102). The communication parameter values ​​may be determined and notified, or conditions indicating the range of the communication parameters and the like may be determined and notified. The communication device 110 acquires communication parameters to be used by the secondary system (T103) and sets communication parameters to be used by the communication device 110 itself (T104). Then, the communication device 110 notifies the terminal 120 of the communication parameters to be used by the terminal 120 under the control of the communication device 110 (T105). Each terminal 120 under the control of the communication device 110 acquires (T106) and sets (T107) the communication parameters to be used by the terminal 120. Then, the terminal 120 communicates with other terminals 120 in the secondary system (T108).

[0199] A communication parameter in the case where a frequency channel to be frequency-shared is used in a side link (direct communication between terminals 120) may be notified, acquired, or set in a form associated with a resource pool for side link in the frequency channel. The resource pool is a radio resource for side link set by a specific frequency resource or time resource. The frequency resource may be, for example, a resource block or a component carrier. The time resource may be, for example, a radio frame, a subframe, a slot, or a mini-slot. When a resource pool is set in a frequency channel to be frequency-shared, the communication device 110 sets the resource pool in the terminal 120 based on at least one of RRC signaling, system information, and downlink control information. The communication parameters to be applied in the resource pool and the side link are also set in the terminal 120 by the communication device 110 based on at least one of RRC signaling, system information, and downlink control information from the communication device 110 to the terminal 120. The notification of the resource pool configuration and the notification of the communication parameters to be used in the sidelink may be performed simultaneously or separately. <<3. Calculation of applicable transmission power value>>

[0200] Furthermore, in this embodiment, the transmission power applicable to the secondary system is calculated taking into consideration the separation distance between the primary system and the secondary system. For example, when there is an inquiry about available frequencies from the secondary system, a transmission power value applicable to the secondary system in a certain frequency range within the shared frequency band is determined based on the separation distance. If there is no applicable transmission power value, the secondary system is prohibited from using that frequency range. If there is an applicable transmission power value, the secondary system is permitted to use that frequency range on the condition that it transmits at the applicable transmission power value.

[0201] However, the radio wave propagation model used to calculate the transmission power value must be switched according to the distance. Therefore, the transmission power value cannot be determined until the distance is known, that is, until the position of the secondary system is known. Therefore, in this embodiment, information used to calculate the transmission power value is generated in advance, and preparations are made so that the transmission power value can be immediately determined when the distance is known. This improves the efficiency of the calculation of the transmission power value.

[0202] It is assumed that the calculation of the transmission power value is mainly performed by the communication control device 130. For example, a management server in an AFC system introduced for protecting Fixed Microwave Services corresponds to the communication control device 130. In the following, for convenience of explanation, the application to an AFC system will be assumed, but the application of this embodiment is not limited to the AFC system.

[0203] Fig. 9 is a diagram showing components for calculating a transmission power value of a communication control device. Components used for purposes other than the calculation are omitted from Fig. 9. Fig. 10 is a flowchart of a process related to calculation and setting of an applicable transmission power value. The process of each component shown in Fig. 9 will be described using the flow of Fig. 10.

[0204] The acquisition unit 131 of the communication control device 130 acquires information on the primary system to be protected from a regulatory database such as the Universal Licensing System (ULS) and stores the information in the storage unit 136 (S101). In order to keep the information stored in the storage unit 136 as up-to-date as possible, it is preferable that the communication control device 130 acquires the information periodically.

[0205] The region generating unit 132 of the communication control device 130 calculates an Exclusion Zone for each primary system based on the acquired information and references the position of the primary system (S102), and stores the calculated Exclusion Zone in the storage unit 136. The Exclusion Zone indicates a region that excludes secondary systems that perform wireless transmission at a specific transmission power value in order to protect the primary system. Hereinafter, the Exclusion Zone will be referred to as EXZ.

[0206] Fig. 11 is a diagram for explaining EXZ. Fig. 11 shows a wireless device 2P belonging to a primary system and a wireless device 2S belonging to a secondary system. Note that the wireless device 2P and the wireless device 2S may be communication devices 110 or terminals 120, and therefore are collectively referred to as wireless devices here. Also, when the terms primary system and secondary system are simply described, they may be read as a wireless device of the primary system and a wireless device of the secondary system.

[0207] 11 shows multiple concentric circles with the wireless device 2P at the center, and the area within each concentric circle is an EXZ, which is represented by symbols EXZ1 to EXZ4. Each concentric circle is the boundary of each EXZ, and is described as an EXZ contour. Note that in this disclosure, an EXZ is an area within a concentric circle that includes the wireless device 2P, and is not a circular portion surrounded by two EXZ contours.

[0208] In Fig. 11, the distance from the primary system to the nth EXZ contour (n is an integer equal to or greater than 1) is defined as d n The distance from the primary system to the boundary of EXZ is described as the boundary distance to distinguish it from the separation distance from the primary system to the secondary system. The boundary distance d n The area within is the nth EXZ. Therefore, EXZ(d n ), EXZ may be expressed by a function including the boundary distance as an argument. In FIG. 11, the separation distance from the primary system to the secondary system is d x It is expressed as follows.

[0209] Note that the interval between EXZ contours may be different. For example, the distance d between the EXZ1 contour and the EXZ2 contour is 2 -d 1 and the distance d from the EXZ2 contour to the EXZ3 contour 3 -d 2 In addition, for the sake of convenience, the EXZ contour is shown as a concentric circle in Fig. 11, but if location-dependent information such as buildings and topography is used, the EXZ contour will be distorted. In that case, the wireless device 2P will not necessarily be the center or center of gravity of the EXZ.

[0210] The minimum EXZ1 is the minimum transmission power value P min EXZ1 indicates an area in which even radio waves must not be transmitted. The communication control device 130 does not permit wireless communication of the secondary system within EXZ1. Therefore, EXZ1 can be said to be a secondary use prohibited area.

[0211] In addition, the maximum EXZ4 is the maximum transmission power value P max indicates an area in which radio waves must not be transmitted. If a secondary system exists outside EXZ4, the communication control device 130 sets the maximum transmission power value P max Allows wireless radio transmissions.

[0212] The transmission power values ​​prohibited in EXZ2 and EXZ3 may be determined in advance or may be determined when calculating each EXZ. Naturally, the closer to the primary system, the larger the prohibited transmission power value. Therefore, the transmission power values ​​related to EXZ2 and EXZ3 are respectively P 2 and P 3 In this case, P min <P 2 <P 3 <P max holds true.

[0213] Since the degree of influence on the primary system differs depending on the channel used by the secondary system, the size of the EXZ also differs depending on the channel used by the secondary system. Therefore, it is necessary to determine the EXZ for each channel used by the secondary system. Here, we will generate a Co-channel Exclusion Zone used when the secondary system uses a channel used by the primary system, and an Adjacent Channel Exclusion Zone when the secondary system uses a channel adjacent to the primary system. Hereinafter, the Co-channel Exclusion Zone will be referred to as C-EXZ, and the Adjacent Channel Exclusion Zone will be referred to as A-EXZ.

[0214] For example, when EXZ in FIG. 11 is C-EXZ, the communication control device 130 sets the transmission power value P min and P 2 Transmission is permitted at a transmission power value of P 3 For example, when EXZ in FIG. 11 is A-EXZ, the communication control device 130 sets the transmission power value P min and P 2 Transmission is permitted at a transmission power value of P 3 Do not allow transmission via.

[0215] In addition, the transmission power value P min and P 2 Instead of allowing transmission at a transmission power value of P 2 However, from the viewpoint of management of the secondary system, it is preferable to permit the setting of discrete values ​​of transmission power for each EXZ present between the radio 2S of the secondary system and the radio 2P of the primary system in the radio 2S of the secondary system.

[0216] The calculation method and details of EXZ will be described later. Note that, in order to immediately perform processing based on EXZ at the time of registration, the calculation of EXZ is performed before S103, but it may be performed after S103. As will be described later, there may be cases where it is desired to generate EXZ according to the frequency range notified by the secondary system. For this reason, the control device 130 may determine EXZ based on information notified by the secondary system.

[0217] After calculating the EXZ for each primary system and each frequency range, the secondary system performs the above-mentioned registration procedure, an inquiry request for available frequencies, etc., to the communication control device 130, and the acquisition unit 131 of the communication control device 130 acquires the information (S103). In response to this, the detection unit 133 of the communication control device 130 detects the primary system that is affected by the secondary system based on the information on the primary system in the storage unit 136 (S104). Then, the transmission power determination unit 134 of the communication control device 130 determines the transmission power value applicable when using the frequency range related to the inquiry based on the detected primary system and each EXZ related to the inquired frequency range (S105). For example, when an inquiry request to use the channel used by the primary system is received, the transmission power determination unit 134 selects multiple EXZs to which the frequency range of the channel used is assigned, that is, C-EXZ, and determines the applicable transmission power value as shown in FIG. 11. Therefore, multiple EXZs to which the same frequency range is assigned and which have different boundary distances, such as EXZ1 to EXZ4 in FIG. 11, are treated as a set. The detection of the primary system and the calculation of the transmission power will be described in detail later.

[0218] The transmitter 135 of the communication control device 130 transmits a transmission power value applicable in the available frequency range to the secondary system that has made the inquiry request for the available frequency (S106). The secondary system sets the frequency and transmission power to be used. The set transmission power value is determined based on the EXZ corresponding to the frequency range to be used, so the primary system is protected.

[0219] The expression format of the transmission power is not particularly limited, and may be expressed, for example, as equivalent isotropically radiated power (EIRP), power flux density (PSD), or the like.

[0220] A method of calculating C-EXZ will be described. Since a plurality of radio wave propagation models stored in the storage unit 136 are used in this calculation, the following rules are set.

[0221] Each radio wave propagation model has a distance range that is an application condition. Here, the m-th threshold value for the boundary distance is D m and the boundary distance d n D m-1 <d n <D m The radio wave propagation model used in this case is M m Each threshold D m The value of may be set appropriately, but D 0 The value of is set to 0. Threshold D m Since the propagation model is switched at the threshold D m is also written as the break point.

[0222] For example, in the R&O (Report & Order) for the opening of the 6 GHz band as a shared frequency band, the requirements for protecting services called Fixed Microwave Services stipulate that the Free space path loss model should be used for separation distances up to 30 m, the WINNER II model should be used for separation distances between 30 m and 1 km, and ITM should be used for separation distances of 1 km or more. In order to comply with these regulations, in this embodiment, the limit value D 0 =0m, limit D 1 =30m, limit D 2 = 1000m, D 0 <d x ≦D 1 The radio wave propagation model M used in 1 is the free space path loss model, and D 1 <d x ≦D 2 The radio wave propagation model M used in 2 is the WINNER II model, and D 2 <d x The radio wave propagation model M used in 3 Let ITM be the ITM.

[0223] When using the WINNER II model, location-dependent information such as buildings and topography may be used to determine LOS / NLOS, and a statistical model may be used when location-dependent information is unavailable. For example, the statistical model may be the probability of LOS P los and loss PL within the forecast los and the probability of being out of line of sight P nlos (=1-P los ) and non-line-of-sight losses PL nlos The product of and the sum of may be used as the propagation loss PL. In other words, PL = P los ×PL los +P nlos ×PL nlos =P los ×PL los +(1-P los )×PL nlosIn addition, when using ITM, the Clutter model may be used together with ITM.

[0224] Also, the number of C-EXZ to be generated and the transmission power value to be assigned are determined. The number of C-EXZ may be determined appropriately. If it is desired to specify the transmission power value in detail, the number of C-EXZ may be made larger than usual. For example, when multiple radios of the primary system are present in a cluster in the vicinity, it is preferable to make the number of C-EXZ larger than usual. Also, for example, the number of C-EXZ may be determined according to the clutter model of the position of the radio of the primary system. For example, when the area where the radio of the primary system is present is a rural area, the number may be made smaller, and when it is an urban area, the number may be made larger.

[0225] In addition, the transmission power value to be assigned to each C-EXZ may be determined appropriately. For example, in order to efficiently obtain C-EXZ, the transmission power for C-EXZ other than the minimum and maximum transmission power value P min Maximum transmission power value P max The step size may be a value at a constant interval (step size) between the minimum transmission power value P min Maximum transmission power value P max The step size P step , P step =(P max -P min ) / N, and the transmission power P n , P n =P min +(n-1)×P step It may be calculated based on the following.

[0226] The maximum transmission power value P max , the minimum transmission power value P min , and the step size P stepEXZ may be an individual value for the primary system or the secondary system, or may be a common value. If it is a common value for the secondary systems, it is not necessary to generate EXZ for each secondary system, which can improve the speed of processing and reduce the load.

[0227] The allowable interference power I of the primary system can be calculated based on the acquired information of the primary system, for example, the interference power to noise power ratio (I / N), noise power, etc. This allowable interference power I and the minimum transmission power value P min The relationship between and is expressed by the following equation.

number

number

number

[0228] As mentioned above, the radio wave propagation model to be used depends on the distance. n Before calculating the value of , it is not clear which radio wave propagation model should be used. Therefore, it is necessary to calculate d using one of several radio wave propagation models. n Calculate the calculated d n The validity of the radio wave propagation model is confirmed by checking whether the calculated d is within the distance range that is the usage condition of the radio wave propagation model. n is adopted as the boundary distance of C-EXZ, but if it is not valid, the calculated d n Discard and use a different radio wave propagation model to obtain d n Recalculate the calculated d n can be considered a candidate.

[0229] For example, d 2 The first radio wave propagation model M 1 The calculation is based on the calculated d 2 The value of D is the limit value 1 If it is below, the radio wave propagation model M 1 Since the distance is within the range of the application condition of 2 is adopted, and the transmission power value is P 2 The boundary distance of C-EXZ2 was adopted. 2 Next, d 3 The first radio wave propagation model M 1 The calculation is based on the calculated d 3 The value of D is the limit value 1 If it exceeds the limit, the radio wave propagation model M 1 Since this is outside the applicable conditions, the calculated d 3 is discarded and the next radio wave propagation model M 2 Based on 3 is calculated. 2 Based on 3 The value of D is the limit value1 Above the limit D 2 If it is below, the radio wave propagation model M 2 Since it is within the applicable conditions of 3 is adopted, and the transmission power value is P 3 The boundary of C-EXZ3 was adopted. 3 It is determined that EXZ(d n ,M n ), EXZ(d n ,D M-1 ,D M ), EXZ may be expressed by a function that includes the radio wave power propagation model used in the calculation or the limit value of the distance range thereof as an argument.

[0230] The flow of processing up to determining EXZ will be described. FIG. 12 is a flowchart showing the flow (algorithm) of the process of determining EXZ. This flow corresponds to the details of the process of S102 in FIG. 10, and is performed by the area generating unit 132. Also, in this flow, C-EXZ corresponding to each transmission power value is calculated, and each calculated C-EXZ is included in the total set C-EXZ. all The information will be entered into the

[0231] First, initialization is performed (S201). For example, the variables n and m used are initialized, and the entire set C-EXZ of C-EXZ to be recorded is all For convenience of explanation, in the example of FIG. 12, the initial values ​​of n and m are set to 0. Next, 1 is added to the variable m (S202), and the m-th radio wave propagation model PL m If the variable m is 1, the first radio wave propagation model PL 1 is selected.

[0232] In this case, C-EXZ is calculated in order of the closest boundary distance, so the first radio wave propagation model PL 1The distance range of the primary system is the closest. When using the radio wave propagation models specified in the R&O (Report & Order) for the aforementioned 6 GHz band release, the first radio wave propagation model is the Free space path loss model, the second radio wave propagation model is the WINNER II model, and the third radio wave propagation model is the ITM.

[0233] Next, the process is performed using the selected radio wave propagation model. The variable n is incremented by 1 (S204), and the nth C-EXZ n The transmission power P n (S205). The transmission power P n The above-mentioned,P n =P min +(n-1)×P step When n is 1, the transmission power P 1 is the minimum transmission power P min And the boundary distance d n Select the model PL m When the variables n and m are both 1, the boundary distance d 1 Based on the free space path loss model, the minimum transmission power P min and the tolerable interference power I.

[0234] Calculated boundary distance d 1 It is checked whether the n-th C-EXZ is within the distance range of the selected radio wave propagation model (S207), and if it is within the distance range (YES in S208), the transmission power P n and boundary distance d n and are confirmed (S209).

[0235] On the other hand, the calculated boundary distance d 1However, if the distance is not within the distance range of the selected radio wave propagation model (NO in S208), the selected radio wave propagation model was not appropriate, and processing is performed to perform calculations using an appropriate radio wave propagation model. Specifically, the variable n is decremented by 1 (S212), and the processing returns to S202 and S203. The reason for decrementing the variable n by 1 is to prevent the n+1th C-EXZ from being calculated without recalculating the nth C-EXZ, which would occur if 1 is added to the variable n in the processing of S204 again. When the processing returns to S202, 1 is added again to the variable m in the processing of S202, and the radio wave propagation model selected in the processing of S203 becomes the next one. For example, if the boundary distance d 1 If the nth C-EXZ transmission power P n and boundary distance d n is confirmed.

[0236] Confirmed, nth C-EXZ n The transmission power P n and boundary distance d n is the information of the n-th C-EXZ, and is the total set C-EXZ all (S210). If the termination condition is met (YES in S211), the flow ends. The termination condition is usually when the transmission power P n and boundary distance d n However, by adding a termination condition related to the processing load, processing time, etc., the flow may be terminated without waiting for the calculation for all C-EXZs to be investigated to be completed. If the termination condition is not satisfied (NO in S211), the process returns to S204. That is, the process proceeds to determining the information of the next n+1th C-EXZ. In this way, the multiple C-EXZs to which any of the multiple transmission power values ​​is assigned are determined in order.

[0237] It is noted that C-EXZ is used when the secondary system uses a channel used by the primary system. However, there may be cases where the secondary system uses a narrowband channel that is only a part of the channel used by the primary system. In other words, there may be cases where the channel inquired about by the secondary system is included in the channel used by the primary system. Even in such cases, the transmission power value may be calculated using C-EXZ. Alternatively, the EXZ for the inquired channel may be calculated, and the transmission power value may be calculated based on the EXZ. In other words, if the frequency range of the channel used by the primary system is within the frequency range of frequency f p_ch,min to frequency f p_ch,max and the frequency range of the channel queried by the secondary system is frequency f s_ch,min to frequency f s_ch,max and f p_ch,min <f s_ch,min <f s_ch,max <f p_ch,max If this holds, then the frequency f p_ch,min to frequency f p_ch,max Instead of calculating C-EXZ for the frequency f s_ch,min to frequency f s_ch,max This is because there is a possibility that a larger transmission power can be used in this case than when the entire band of the channel used by the primary system is used.

[0238] In addition, EXZ(ch1), EXZ(f p_ch,min ,f p_ch,max ), EXZ(f s_ch,min ,f s_ch,max EXZ may be expressed by a function including a channel number and a frequency range as arguments, such as EXZ(f p_ch,min ,f p_ch,max ) means C-EXZ because it is an EXZ related to the channel used by the primary system.

[0239] There may be cases where the radio wave propagation model is not a function of distance only. For example, there may be cases where it is required to use an actual value for the height of the antenna of the secondary system, rather than a pre-specified value. In such cases, the height h of the secondary antenna becomes an argument of the radio wave propagation model. Therefore, the radio wave propagation model may be expressed as PL(d,h).

[0240] Instead of performing calculations based on a radio wave propagation model, calculations may be performed by referring to a lookup table created in advance, such as the one below. For example, when the height h of the secondary system antenna is 2.1 m, and the propagation loss required is approximately 33 m away from the primary system, the value 82.15 may be used based on the lookup table below. [Table 5]

[0241] Furthermore, while the separation distance from the primary system has been assumed to be the distance in two-dimensional coordinates, i.e., the horizontal distance, it may be the distance in three-dimensional coordinates including the antenna height, i.e., the spatial distance. Whether the separation distance is the horizontal distance or the spatial distance depends on the propagation model. The spatial distance is calculated using the following formula.

[0242]

number

[0243] In addition, when applying a radio wave propagation model that uses topographical information, such as the WINNER II model when ITM or a statistical model is not used, the direction must be taken into consideration. For example, the calculated boundary distance differs between the direction in which there is a building between the primary system and the direction in which there is no building, and the shape of the EXZ becomes distorted as described above. Therefore, the primary system is taken as the origin, and the angle formed by the direction from this origin and the reference direction from this origin, that is, the azimuth angle, can also be an argument of the radio wave propagation model. Therefore, the radio wave propagation model may be expressed as a function that includes the azimuth angle θ as an argument, such as PL(d,θ) or PL(d,h,θ). The value of the azimuth angle θ is calculated based on the transmission power P m For example, the boundary distance may be calculated every 30 degrees from 0 degrees to 360 degrees. In this case, each point represented by the azimuth angle θ and the calculated boundary distance becomes the boundary, and EXZ is represented by a shape connecting the adjacent points. Also, the angle θ may be included as an argument in a radio wave propagation model that uses topographical information, and the angle θ may not be included as an argument in a radio wave propagation model that does not use topographical information. In other words, the arguments used may differ depending on the radio wave propagation model.

[0244] The calculation algorithm of A-EXZ is the same as that of C-EXZ. However, since A-EXZ is an EXZ in which the secondary system uses an adjacent channel, the transmission power P n The interference power is the power value that interferes (leaks) with the channel used by the primary system when the secondary system transmits radio waves in the frequency range and transmission power value assigned to A-EXZ. For example, the transmission power P n The product of the interference power from the nearby channel to the used channel and the nearby channel leakage ratio (ACLR) from the nearby channel to the used channel may be used as the interference power from the nearby channel to the used channel. As with C-EXZ, the calculated value based on the calculated interference power and the propagation loss based on the selected radio wave propagation model may be regarded as the power value observed in the primary system.

[0245] In addition, the frequency range of C-EXZ is the same as that of the channel used by the primary system, but the frequency range of A-EXZ, that is, the frequency range of the nearby channel, may be determined as appropriate. For example, the frequency range of the nearby channel may be determined in advance based on the length of the channel used. For example, a frequency range that is continuous with the channel used and has the same length as that of the channel used may be set as the first nearby channel, and a frequency range that is continuous with the first nearby channel and has the same length as that of the first nearby channel may be set as the second nearby channel, and A-EXZ of the first nearby channel and the second nearby channel may be generated. Alternatively, the frequency range of the nearby channel may be determined taking into consideration the magnitude of interference power with respect to the channel used. For example, the nearby channel may be set to a frequency from the limit frequency of the channel used to a frequency at which the interference power is less than a predetermined threshold. When calculating A-EXZ with different frequency ranges, the flow of FIG. 12 is executed for each frequency range.

[0246] Fig. 13 is a diagram explaining the difference in interference power. The dotted line graph in Fig. 13 indicates the transmission power of the primary system, and the solid line graph indicates the transmission power or interference power of the secondary system. The highest step (peak) in both graphs corresponds to the channel used by both systems.

[0247] In the example of Figure 13, it is assumed that the secondary system uses the first nearby channel described above. Therefore, as shown in Figures 13(A) and 13(B), the positions of the highest steps of the dotted line graph and the solid line graph are different. In addition, it is assumed that the frequency range to be used by the secondary system is a narrowband channel that is only a part of the first nearby channel of the primary system. Therefore, the widths of the highest steps of the dotted line graph and the solid line graph are also different.

[0248] In FIG. 13(A), the center frequency of the frequency range to be used by the secondary system is the center frequency f c,p In this case, the center frequency of the frequency range to be used by the secondary system is f c,S,minIn FIG. 13B, the center frequency of the frequency range to be used by the secondary system is the center frequency f c,p In this case, the center frequency of the frequency range to be used by the secondary system is f c,S,max It shows that:

[0249] The steps other than the highest step (peak) of the solid line graph shown in a stepped manner indicate the interference power to adjacent channels. As shown in Fig. 13, the interference power is considered to decrease in steps, and the interference power in the frequency range related to the step one step lower than the peak is defined as the first interference power, and the interference power in the frequency range related to the step two steps lower than the peak is defined as the second interference power. The values ​​of the first interference power and the second interference power are determined based on the transmission power of the secondary system.

[0250] In FIG. 13(A), the first interference power and the second interference power exist in the channel used by the primary system, but in FIG. 13(B), only the second interference power exists in the channel used by the primary system. In this way, even if the frequency range used by the secondary system is within the first nearby channel, the influence on the primary system differs depending on the position in the first nearby channel. Therefore, instead of defining nearby channels for each frequency range having the same length as the channel used by the primary system, the frequency range of the nearby channel may be determined according to the magnitude of interference power to the channel used by the primary system. Alternatively, the nearby channels defined for each frequency range having the same length as the channel used by the primary system may be divided according to the magnitude of interference power to the channel used by the primary system. Then, for example, when the first nearby channel is included in the frequency range inquired from the secondary system, the communication control device 130 may determine the transmission power value for each divided frequency range in the first nearby channel. Alternatively, the transmission power value of the frequency range in which the transmission power value is the lowest among the divided frequency ranges in the first nearby channel may be determined as the transmission power value of the first nearby channel.

[0251] In addition, there may be cases where an out-of-band emission limit (OOBE limit) is specified. For example, when the acquired information of the primary system includes an out-of-band emission limit, the frequency range of the adjacent channel may be determined taking the out-of-band emission limit into consideration. FIG. 14 is a diagram showing an example of an out-of-band emission limit. The out-of-band emission limit in FIG. 14 is specified in the R&O (Report & Order) related to the opening of the 6 GHz band in the United States.

[0252] In the example of Fig. 14, the graph showing the restriction level of the out-of-band emission restriction has a slope that changes depending on the frequency range. In such a case, it is preferable to calculate A-EXZ for each frequency range with a constant slope, since this makes it easier to calculate the allowable value based on the restriction level. In calculating A-EXZ for each frequency range, the out-of-band emission is calculated using PSD (Power Spectral Density) in constant frequency step units such as 1 MHz units, and A-EXZ is calculated by adding a condition that the out-of-band emission does not exceed the allowable value based on the restriction level.

[0253] Also, for example, the secondary system may notify the communication control device 130 that it desires to perform calculation of frequency availability based on a specific frequency range. Hereinafter, this information will be referred to as a "frequency range mode". The frequency range mode may be expressed, for example, as a Boolean value indicating whether the calculation is desired (true) or not (false). When the frequency range mode is true, for example, an EXZ related to a frequency range related to an inquiry from the secondary system may be calculated. For example, a CC (Component Carrier) or a frequency range (for example, 5, 10, 20, 40, 80, 160, 320 MHz, etc.) defined in the specifications of LTE, 5G NR, WLAN, etc. may be used as the frequency range related to the inquiry. Also, the communication control device 130 may divide the frequency range related to the inquiry to align it with the frequency range of the above CC, etc.

[0254] In addition, it is also possible that the secondary system inquires about using a channel that overlaps the used channel and the nearby channel of the primary system. In this case, the inquired frequency range may be divided into the used channel and the nearby channel, but it is also possible to calculate the EXZ for the entire inquired frequency range by calculating the interference power using the nearby channel interference ratio ACIR.

[0255] 15 to 17 are diagrams for explaining calculation of adjacent channel interference ratio ACIR. As in FIG. 13, the dotted line graph indicates the transmission power of the primary system, and the solid line graph indicates the transmission power of the secondary system. FIG. 15 shows a case where a part of the channel used by the secondary system overlaps with the channel used by the primary system. In other words, it shows a case where the channel used by the secondary system straddles the boundary between the channel used by the primary system and the adjacent channel.

[0256] It is known that the ACIR can be calculated based on the frequency range of the channel used by the primary system, the frequency range of the channel used by the secondary system, the width of the overlapping part of both channels, and the length of the non-overlapping part of both channels. If these are expressed by constants A, B, a, b, and c as shown in Figure 15, the ACIR can be calculated by the following formula.

number

[0257] Also, Figure 16 shows a case where the channels used by the secondary system include all of the channels used by the primary system. Figure 17 shows a case where the channels used by the primary system include all of the channels used by the secondary system. In these cases, too, the EXZ for the entire inquired frequency range may be calculated without dividing the inquired frequency range into in-use channels and nearby channels. In the case of Figure 16, the ACIR is found by the following formula.

number

number

[0258] In this way, it is possible to extract from the inquiry frequency range a frequency range that is entirely included in the channels used by the primary system, a frequency range that includes all the channels used by the primary system, and a frequency range that partially overlaps with the channels used by the primary system, and then calculate EXZ for the extracted frequency range. When taking out-of-band emission restrictions into consideration when calculating EXZ, it is sufficient to divide the EXZ to be calculated for each frequency range with a constant slope of the restriction level, as with A-EXZ.

[0259] When the frequency range mode is false, the transmission power value in the frequency range related to C-EXZ or A-EXZ may be calculated based on the previously generated C-EXZ or A-EXZ. Alternatively, from the viewpoint of protecting the primary system, the transmission power value in the frequency range where interference is expected to be the greatest, such as the channel in use, may be calculated, and the transmission power value may be notified to be used regardless of which frequency range of the shared frequency band is used.

[0260] The victim incumbent receiver discovery will now be described. In order to detect a primary system that is affected by a target secondary system, the communication control device 130 calculates the distance between the target secondary system and each primary system. The horizontal separation distance d 2D and the spatial separation distance d 3D or the secondary system may be used. In other words, the antenna height may be taken into consideration. The positions of the primary system and the secondary system may be virtually set positions, not actual positions of the wireless devices. The communication control device 130 may determine the affected primary system based on the calculated distance.

[0261] The communication control device 130 may detect only the primary system that is most susceptible to being affected by the secondary system. When the transmission power of the secondary system is set so as not to affect the primary system that is most susceptible to being affected, it may be considered that there is no effect on the other primary systems.

[0262] For example, it is considered that the path loss increases depending on the distance. Therefore, when a primary system exists in a distance range using a propagation model that does not depend on the terrain, the nearest primary system may be detected. For example, when it is specified that the free space path loss model is used up to a separation distance of 30 m, the free space path loss model is not a propagation model that depends on the terrain, so it is sufficient to search for primary systems with a separation distance of 30 m or less, and select the primary system that is closest to the secondary system from among the detected primary systems. However, it should be noted that when the allowable interference power of each primary system is different, the primary system that is closest to the secondary system may not be the primary system that is most susceptible to the influence of the secondary system.

[0263] The calculation of the transmission power will be explained. It is assumed that the C-EXZ of the detected primary system is calculated as shown in the table below. Also, it is assumed that the distance between the secondary system and the detected primary system is 5 m. [Table 6]

[0264] As described in the explanation of FIG. 11, in order to protect the primary system, it is preferable to set a transmission power value that is known to be as safe as possible. Therefore, it is preferable to allocate transmission power in EXZ where the boundary distance is shorter than the separation distance. When the separation distance is 5 m, it is preferable to permit the secondary system to transmit at a transmission power of 24 dBm for C-EXZ1 where the boundary distance is 2 m and at a transmission power of 27 dBm for C-EXZ2 where the boundary distance is 3 m. Therefore, the communication control device 130 notifies the secondary system to transmit at a transmission power of 24 dBm or 27 dBm in the channel used by the detected primary system. The set of permitted transmission power values ​​is referred to as a transmission power set.

[0265] For the adjacent channels of the detected primary system, the above C-EXZ table is replaced with the A-EXZ table to obtain the permitted transmission power. For example, assume that the A-EXZ for the first adjacent channel of the detected primary system and the A-EXZ for the second adjacent channel are calculated as shown in the following table. [Table 7] [Table 8] According to the above table, when the separation distance is 5 m, the transmission power of A-EXZ 1, A-EXZ 2, and A-EXZ 3 can be permitted in the first nearby channel at 24 dBm, 27 dBm, and 30 dBm. In addition, the transmission power of all A-EXZ can be permitted in the second nearby channel at 24 dBm, 27 dBm, 30 dBm, and 33 dBm. Therefore, the communication control device 130 notifies the first nearby channel of the detected primary system to transmit at a transmission power of 24 dBm, 27 dBm, or 30 dBm, and notifies the second nearby channel of the detected primary system to transmit at a transmission power of 24 dBm, 27 dBm, 30 dBm, or 33 dBm.

[0266] In addition, in a frequency range outside the frequency range from the used channel to the second nearby channel, the maximum transmission power specified in the secondary system may basically be permitted. Note that a primary system whose maximum C-EXZ or maximum A-EXZ transmission power is smaller than the maximum transmission power set in the secondary system may be searched for in advance, and when the primary system is not detected, the maximum transmission power of the secondary system may be permitted in a frequency range other than the used channel and nearby channels of the primary system. When the primary system is detected, the minimum value of the maximum C-EXZ and A-EXZ transmission powers of the detected primary system may be set as the maximum transmission power of the secondary system in the frequency range other than the used channel and nearby channels of the primary system.

[0267] In this way, the communication control device 130 divides the available frequencies into ranges such as the channel used by the primary system, nearby channels, and others, and notifies the allowable transmission power for each range. For example, in the examples of Tables 6 to 8 above, if the secondary system uses the minimum frequency f min to maximum frequency f max Suppose we ask whether a frequency range up to the minimum frequency f min to maximum frequency f max During this time, the number of channels used by the primary system (f ch,minFrom f ch,max ), the first neighboring channel (f min, lower FR1 From f max, lower FR1 Up to f min, Upper FR1 , f max, Upper FR1 ), and the second nearest neighbor channel (f min, lower FR2 From f max, lower FR2 Up to f min, Upper FR2 From f max, Upper FR2 In this case, the allocation of transmission power from the communication control device 130 to the secondary system is finally as shown in the following table. Note that the maximum transmission power specified in the secondary system is 36 dBm. [Table 9]

[0268] The communication control device 130 may notify the secondary system of the transmission power set, or may notify only the maximum transmission power value.

[0269] In addition, even if the transmission power set is calculated based on the primary system closest to the secondary system, there is a possibility that the primary system may not actually be the primary system most susceptible to influence from the secondary system. Therefore, to ensure safety, it may be confirmed whether the secondary system will not affect other primary systems when the secondary system transmits at the transmission power set or maximum transmission power value in each frequency range that is to be notified.

[0270] In this way, the secondary system is notified of settings that satisfy requirements such as changing the radio wave propagation model to be used depending on the distance from the primary system, checking the transmittable power of the frequency for each power width, etc. Then, the secondary system that receives the notification sets its transmission power according to the notification, thereby protecting the primary system.

[0271] It is also assumed that the radio of the secondary system moves. In such a case, the secondary system notifies the communication control device 130 of the location to which it is to move, and the communication control device 130 determines the applicable transmission power value again. However, when the area including the location of the secondary system is the same before and after the movement, the applicable transmission power value is the same, so there is no need to recalculate, and it is sufficient to notify the secondary system that the current situation is acceptable. For example, as shown in FIG. 11, when only EXZ1 to EXZ3 include the location of the secondary system before the movement and only EXZ1 and EXZ2 include the location of the secondary system after the movement, the area including the location of the secondary system is not the same, so recalculation is performed and a new permitted transmission power value is determined.

[0272] Also, the secondary system may notify the communication control device 130 of the planned movement range in advance. Also, the communication control device 130 may determine the transmission power based on the planned movement range, not on the current position of the secondary system. In order to protect the primary system to the maximum extent, it is preferable to calculate the transmission power when the secondary system moves to C-EXZ and A-EXZ, which are included in the planned movement range and are closest to the primary system. By doing so, even if the secondary system moves within the planned movement range, it becomes unnecessary to inquire of the communication control device 130 about the available transmission power.

[0273] FIG. 18 is a diagram for explaining the determination of transmission power when the secondary system notifies the planned movement range. FIG. 18 shows a circle with the wireless device 2S at its center. The circle shows the planned movement range of the wireless device 2S. In the example of FIG. 18, the planned movement range spans EXZ3 and EXZ4. Therefore, the communication control device 130 assumes a case where the secondary system moves to EXZ3, which is closest to the primary system within the planned movement range, and permits transmission power for EXZ1 and EXZ2, but does not permit transmission power for EXZ3. Therefore, in the example of FIG. 18, even though the wireless device 2S is currently outside EXZ4, it is permitted the same transmission power as in the example of FIG. 11, where the wireless device 2S was within EXZ3.

[0274] As described above, in this embodiment, the transmittable power of a secondary system using a shared frequency band can be effectively and efficiently calculated while changing the radio wave propagation model based on the distance from the primary system to be protected. Also, even if the secondary system moves, the available frequencies can be easily calculated based on the expected range of movement.

[0275] The process of the present disclosure is not limited to a specific standard, and the illustrated settings may be changed as appropriate. For example, the process may be used to create recommended spectrum information in a system in which each system has the same priority, rather than a system having a hierarchical relationship such as primary and secondary. In addition, the frequency band is not limited to a specific band such as the 6 GHz band.

[0276] The above-described embodiment shows an example for realizing the present disclosure, and the present disclosure can be implemented in various other forms. For example, various modifications, substitutions, omissions, or combinations thereof are possible without departing from the gist of the present disclosure. Such modifications, substitutions, omissions, etc. are also included in the scope of the present disclosure, as well as in the scope of the invention and its equivalents described in the claims.

[0277] In addition, the procedure of the process described in the present disclosure, such as the above-mentioned flowchart, is an example, and does not necessarily have to be performed in that procedure. For example, the communication control device 130 may calculate the EXZ of a primary system in the vicinity of a secondary system after making an inquiry about an available frequency from the secondary system.

[0278] Furthermore, the processing procedures described in the present disclosure, such as the above-mentioned flowchart, may be regarded as a method having a series of these procedures. Alternatively, the processing procedures may be regarded as a program for causing a computer to execute the series of procedures, or as a recording medium for storing the program. For example, when the above-mentioned program is executed by a computer, the computer operates as the communication control device 130. Furthermore, the processing of the communication control device 130 described above is executed by a processor such as a central processing unit (CPU) of the computer. Furthermore, the type of recording medium is not particularly limited since it does not affect the embodiment of the present disclosure.

[0279] In the present disclosure, the term "and / or" means that it may be read as either "and" or "or."

[0280] In addition, the formulas shown in this disclosure are merely examples of processes that can be performed, and do not necessarily have to be applied as is. For example, constants and other variables may be added to the formulas to modify them, and when values ​​are calculated using the formulas, approximate values ​​such as rounded values ​​may be used.

[0281] The present disclosure can also be configured as follows. [1] A step of generating a plurality of regions to which any of the plurality of transmission power values ​​is assigned and which are based on at least a plurality of transmission power values ​​and a plurality of radio wave propagation models and which are referenced to a position of the first wireless device; determining a transmission power value permitted for wireless communication of the second wireless device based on a transmission power value assigned to an area among the plurality of areas that does not include a position of the second wireless device; Equipped with The step of generating a plurality of regions includes: calculating a candidate area, which is a candidate of the area, by using any one of the plurality of radio wave propagation models; confirming the validity of a radio wave propagation model used based on a distance between a boundary of the candidate area and the first wireless device; determining the area candidate as the area if the used radio wave propagation model is appropriate, and calculating another area candidate using another radio wave propagation model if the used radio wave propagation model is not appropriate; Equipped with Communications control method. [2] A frequency range is pre-assigned to each of the plurality of regions; The determined transmission power value is a transmission power value permitted for wireless communication in the frequency range assigned to the area of ​​the second radio device. The communication control method described in [1]. [3] In the step of calculating the area candidate, a position of the second radio device such that a power value of the radio wave observed at the first radio device when the second radio device transmits the radio wave in the frequency range and with a transmission power value assigned to the area is approximately equal to an allowable interference power of the first radio device is calculated; the calculated position of the second wireless device becomes the boundary of the area candidate. The communication control method described in [2]. [4] When a first frequency range used by the first radio device or a frequency range entirely included within the first frequency range is assigned to the region, A calculated value based on a transmission power value assigned to the region and a propagation loss based on a selected radio wave propagation model is regarded as a power value of the radio wave observed in the first radio device. The communication control method described in [3]. [5] When a frequency range outside the first frequency range used by the first radio device is assigned to the area, A calculated value based on the interference power in the first frequency range caused by radio waves transmitted by the second radio device in the frequency range and transmission power value assigned to the area and the propagation loss amount based on a selected radio wave propagation model is regarded as the power value of the radio waves observed in the first radio device. The communication control method described in [3]. [6] obtaining a query frequency range from the second radio device; Further equipped with The plurality of regions are region sets generated for each predetermined frequency range, In the step of determining a transmission power value, a set of regions based on the interrogated frequency range is selected; The determined transmit power value is determined based on the selected set of regions. A communication control method described in any one of [2] to [5]. [7] When the inquiry frequency range includes a first frequency range used by the first radio device, a region set to which the first frequency range is assigned is selected; A transmit power value permitted in the first frequency range of the second radio is determined. A communication control method as described in [6]. [8] When the inquiry frequency range includes a frequency within a second frequency range that is continuous with a first frequency range used by the first radio device and has the same length as the first frequency range, a region set to which the second frequency range is assigned is selected; A transmit power value permitted in the second frequency range of the second radio is determined. A communication control method as described in [6]. [9] When the inquiry frequency range includes a frequency within a second frequency range that is continuous with a first frequency range used by the first radio device and has the same length as the first frequency range, a region set to which a third frequency range within the second frequency range is assigned and a region set to which a fourth frequency range within the second frequency range is assigned are selected, a transmission power value permitted in the third frequency range of the second radio device and a transmission power value permitted in the fourth frequency range of the second radio device are determined; The third frequency range and the fourth frequency range are determined based on interference power to the first frequency range. A communication control method as described in [6].

[10] Obtaining information regarding out-of-band emission limits Further equipped with In the step of generating the plurality of regions, the region set is generated for each frequency range having a different slope of a graph showing the relationship between the frequency and the limit level of the out-of-band emission limit. A communication control method described in any one of [6] to [9].

[11] extracting, from the inquiry frequency range, at least one of a frequency range entirely contained within a first frequency range used by the first radio device, a frequency range entirely containing the first frequency range, and a frequency range partially overlapping with the first frequency range; Generate the set of regions to which the extracted frequency ranges are assigned. A communication control method according to any one of [6] to

[10] .

[12] In the step of calculating the area candidate, a position of the second radio device where a power value of the radio wave observed at the first radio device when the second radio device transmits the radio wave in the frequency range and with a transmission power value assigned to the area is approximately equal to an allowable interference power of the first radio device is calculated; the calculated position of the second wireless device becomes the boundary of the area candidate, a power value of the radio wave observed in the first radio device is a calculated value based on a transmission power value assigned to the area set, an interference ratio, and a path loss amount based on a selected radio wave propagation model; The interference ratio is based on the lengths of an overlapping range between the extracted frequency range and the first frequency range, a non-overlapping range between the extracted frequency range and the first frequency range, and a non-overlapping range between the extracted frequency range and the first frequency range. The communication control method described in

[11] .

[13] The step of generating the plurality of regions further includes a step of calculating the plurality of transmission power values ​​based on a maximum transmission power value and a minimum transmission power value that the second radio device can output. A communication control method according to any one of [1] to

[12] .

[14] the boundary of the area candidate and the position of the second radio device are expressed by three-dimensional coordinates including two-dimensional coordinates and an antenna height of the second radio device; The boundary of the area or the distance between the second radio device and the first radio device is expressed as a spatial distance based on the difference between the height of the antenna of the second radio device and the height of the antenna of the first radio device. A communication control method according to any one of [1] to

[13] .

[15] The plurality of regions are represented by concentric circles centered on the position of the first wireless device. A communication control method according to any one of [1] to

[14] .

[16] A boundary point of the area candidate is calculated for each predetermined azimuth angle from a reference direction from the position of the first wireless device; The area is represented by a shape connecting adjacent boundary points. A communication control method according to any one of [1] to

[15] .

[17] A distance range is defined for each of the plurality of radio wave propagation models, and when the distance between the boundary of the area candidate and the first wireless device is within the distance range defined for the used radio wave propagation model, the used radio wave propagation model is determined to be valid. A communication control method according to any one of [1] to

[16] .

[18] acquiring a position of the second wireless device; when the area including the position of the second radio device is the same before and after the change in the position of the second radio device, a transmission power value permitted in wireless communication of the second radio device is not changed, When the area including the position of the second wireless device is not the same before and after the change in position of the second wireless device, the step of determining the transmission power value is executed, and a transmission power value permitted in wireless communication of the second wireless device is newly determined. A communication control method according to any one of [1] to

[17] .

[19] The method further includes the step of acquiring a planned movement range of the second wireless device, In the step of determining the transmission power value, the permitted transmission power value is determined based on a transmission power value allocated to an area not including a planned movement range of the second wireless device. A communication control method according to any one of [1] to

[18] .

[20] a region generating unit that generates a plurality of regions based on a position of the first wireless device and to which any one of the plurality of transmission power values ​​is assigned based on at least a plurality of transmission power values ​​and a plurality of radio wave propagation models; a transmission power determination unit that determines a transmission power value permitted for wireless communication of the second radio device based on a transmission power value allocated to an area among the plurality of areas that does not include a position of the second radio device; Equipped with The area generating unit Calculating a region candidate that is a candidate for the region using any one of the plurality of radio wave propagation models; confirming the validity of a radio wave propagation model used based on a distance between a boundary of the area candidate and the first wireless device; If the radio wave propagation model used is not valid, another radio wave propagation model is used to calculate another area candidate. Communications control device. [Explanation of symbols]

[0282] 100 Communication Network 110(110A, 110B, 110C) Communication equipment 111 Transmitter of communication device 112 Acquisition unit of communication device 113 Calculation section 114 Radio Communication Department 115 Antenna 116 Memory section of communication device 117 Switching Judgment Unit 120 terminals 130 (130A, 130B) Communication control device 131 Acquisition Department 132 Area generator 133 Detection Unit 134 Transmission power determination unit 135 Transmitter 136 Memory section 2. Radio 2P Primary system radio 2S Secondary System Radio EXZ (EXZ1 to EXZ4) Exclusion Zone

Claims

1. generating a plurality of regions to which any of the plurality of transmission power values ​​is assigned and which are referenced to a position of the first wireless device, based on at least a plurality of transmission power values ​​and a plurality of radio wave propagation models; determining a transmission power value permitted for wireless communication of the second wireless device based on a transmission power value assigned to an area among the plurality of areas that does not include a position of the second wireless device; Equipped with The step of generating a plurality of regions includes: calculating a candidate area, which is a candidate of the area, by using any one of the plurality of radio wave propagation models; confirming the validity of a radio wave propagation model used based on a distance between a boundary of the candidate area and the first wireless device; determining the area candidate as the area if the used radio wave propagation model is appropriate, and calculating another area candidate using another radio wave propagation model if the used radio wave propagation model is not appropriate; Equipped with Communications control method.

2. A frequency range is pre-assigned to each of the plurality of regions; The determined transmission power value is a transmission power value permitted for wireless communication in the frequency range assigned to the area of ​​the second radio device. The communication control method according to claim 1 .

3. In the step of calculating the area candidate, a position of the second radio device where a power value of the radio wave observed at the first radio device when the second radio device transmits the radio wave in the frequency range and with a transmission power value assigned to the area is approximately equal to an allowable interference power of the first radio device is calculated; the calculated position of the second wireless device becomes the boundary of the area candidate. The communication control method according to claim 2.

4. When a first frequency range used by the first radio device or a frequency range entirely included within the first frequency range is assigned to the region, A calculated value based on a transmission power value assigned to the region and a propagation loss based on a selected radio wave propagation model is regarded as a power value of the radio wave observed in the first radio device. The communication control method according to claim 3.

5. When a frequency range outside a first frequency range used by the first radio device is assigned to the area, A calculated value based on an interference power in the first frequency range caused by radio waves transmitted by the second radio device in the frequency range and transmission power value assigned to the area and a propagation loss amount based on a selected radio wave propagation model is regarded as a power value of the radio waves observed in the first radio device. The communication control method according to claim 3.

6. obtaining a query frequency range from the second radio; Further equipped with The plurality of regions are region sets generated for each predetermined frequency range, In the step of determining a transmission power value, a set of regions based on the interrogated frequency range is selected; The determined transmit power value is determined based on the selected set of regions. The communication control method according to claim 2.

7. When the inquiry frequency range includes a first frequency range used by the first radio device, a region set to which the first frequency range is assigned is selected; A transmit power value permitted in the first frequency range of the second radio is determined. The communication control method according to claim 6.

8. When the inquiry frequency range includes a frequency within a second frequency range that is continuous with a first frequency range used by the first radio device and has the same length as the first frequency range, a region set to which the second frequency range is assigned is selected; A transmit power value permitted in the second frequency range of the second radio is determined. The communication control method according to claim 6.

9. When the inquiry frequency range includes a frequency within a second frequency range that is continuous with a first frequency range used by the first radio device and has the same length as the first frequency range, a region set to which a third frequency range within the second frequency range is assigned and a region set to which a fourth frequency range within the second frequency range is assigned are selected, a transmission power value permitted in the third frequency range of the second radio device and a transmission power value permitted in the fourth frequency range of the second radio device are determined; The third frequency range and the fourth frequency range are determined based on interference power to the first frequency range. The communication control method according to claim 6.

10. Obtaining information regarding out-of-band emission limits Further equipped with In the step of generating the plurality of regions, the region set is generated for each frequency range having a different slope of a graph showing the relationship between the frequency and the limit level of the out-of-band emission limit. The communication control method according to claim 6.

11. extracting, from the inquiry frequency range, at least one of a frequency range entirely contained within a first frequency range used by the first radio device, a frequency range entirely containing the first frequency range, and a frequency range partially overlapping with the first frequency range; Generate the set of regions to which the extracted frequency ranges are assigned. The communication control method according to claim 6.

12. In the step of calculating the area candidate, a position of the second radio device where a power value of the radio wave observed at the first radio device when the second radio device transmits the radio wave in the frequency range and with a transmission power value assigned to the area is approximately equal to an allowable interference power of the first radio device is calculated; the calculated position of the second wireless device becomes the boundary of the area candidate, a power value of the radio wave observed in the first radio device is a calculated value based on a transmission power value assigned to the area set, an interference ratio, and a path loss amount based on a selected radio wave propagation model; The interference ratio is based on the lengths of an overlapping range between the extracted frequency range and the first frequency range, a non-overlapping range between the extracted frequency range and the first frequency range, and a non-overlapping range between the first frequency range and the extracted frequency range. The communication control method according to claim 11.

13. The step of generating the plurality of regions further includes a step of calculating the plurality of transmission power values ​​based on a maximum transmission power value and a minimum transmission power value that the second radio device can output. The communication control method according to claim 1 .

14. a boundary of the area candidate and a position of the second radio device are represented by three-dimensional coordinates including two-dimensional coordinates and an antenna height of the second radio device; The distance between the boundary of the area or between the second radio device and the first radio device is expressed as a spatial distance based on the difference between the height of the antenna of the second radio device and the height of the antenna of the first radio device. The communication control method according to claim 1 .

15. The plurality of regions are represented by concentric circles with the position of the first wireless device as the center. The communication control method according to claim 1 .

16. A boundary point of the area candidate is calculated for each predetermined azimuth angle from a reference direction from the position of the first wireless device; The area is represented by a shape connecting adjacent boundary points. The communication control method according to claim 1 .

17. A distance range is defined for each of the plurality of radio wave propagation models, and when the distance between the boundary of the area candidate and the first wireless device is within the distance range defined for the used radio wave propagation model, the used radio wave propagation model is determined to be valid. The communication control method according to claim 1 .

18. acquiring a position of the second wireless device; when the area including the position of the second radio device is the same before and after the change in the position of the second radio device, a transmission power value permitted in wireless communication of the second radio device is not changed, When the area including the position of the second wireless device is not the same before and after the change in position of the second wireless device, the step of determining the transmission power value is executed, and a transmission power value permitted in the wireless communication of the second wireless device is newly determined. The communication control method according to claim 1 .

19. The method further includes the step of acquiring a planned movement range of the second wireless device, In the step of determining the transmission power value, the permitted transmission power value is determined based on a transmission power value allocated to an area not including a planned movement range of the second wireless device. The communication control method according to claim 1 .

20. a region generating unit that generates a plurality of regions based on a position of the first wireless device and to which any one of the plurality of transmission power values ​​is assigned based on at least a plurality of transmission power values ​​and a plurality of radio wave propagation models; a transmission power determination unit that determines a transmission power value permitted for wireless communication of the second wireless device based on a transmission power value allocated to an area among the plurality of areas that does not include a position of the second wireless device; Equipped with The area generating unit Calculating a region candidate that is a candidate for the region using any one of the plurality of radio wave propagation models; confirming the validity of a radio wave propagation model used based on a distance between a boundary of the area candidate and the first wireless device; If the radio wave propagation model used is not valid, another radio wave propagation model is used to calculate another area candidate. Communications control device.

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