Communication control device and communication control method

Abstract

This communication control device is provided with: an acquisition unit that acquires information of one or more communication devices; a decision unit that, on the basis of the acquired information, decides a medium reservation system for the one or more communication devices to share a prescribed channel; and a notification unit that notifies the communication devices of the decided medium reservation system.

Description

[Technical Field]

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

[0002] The problem of the depletion of radio wave resources (radio resources) that can be allocated to wireless systems (wireless devices) has become apparent. All radio wave bands are already in use by existing wireless systems (wireless devices), making it difficult to allocate radio wave resources to new wireless systems. Therefore, in recent years, attention has begun to be paid to the more effective use of radio wave resources by utilizing cognitive radio technology. Cognitive radio technology frees up radio wave resources by utilizing white space (vacant radio waves) in time and space of existing wireless systems. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] WINNF-TS-0247-V1.2.0 CBRS Certified Professional Installer Accreditation Technical Specification. [Non-patent document 2] WINNF-TS-0016-V1.2.3 Signaling Protocols and Procedures for Citizens Broadband Radio Service (CBRS): Spectrum Access System (SAS) - Citizens Broadband Radio Service Device (CBSD) Interface Technical Specification [Non-patent document 3] ECC Report 186, Technical and operational requirements for the operation of white space devices under geo-location approach, CEPT ECC, 2013 January [Non-patent document 4] White Space Database Provider (WSDB) Contract, available at https: / / www.ofcom.org.uk / __data / assets / pdf_file / 0026 / 84077 / white_space_database_contract_for_operational_use_of_wsds.pdf [Non-patent document 5] WINNF-TS-0096-V1.3.1 Signaling Protocols and Procedures for Citizens Broadband Radio Service (CBRS): Spectrum Access System (SAS) - SAS Interface Technical Specification [Non-patent document 6] WINNF-TS-0112-V1.7.0 Requirements for Commercial Operation in the US 3550-3700 MHz Citizens Broadband Radio Service Band [Non-Patent Document 7] IEEE Std 802.19.1aTM-2017 “Coexistence Methods for Geo-location Capable Devices Operating under General Authorization” [Non-patent document 8] 47 CFR Part 96 Citizens Broadband Radio Service, https: / / www.ecfr.gov / cgi-bin / text-idx?node=pt47.5.96#se47.5.96 [Non-Patent Document 9] WINNF-TS-0245-V1.0.0 Operations for Citizens Broadband Radio Service (CBRS): Priority Access License (PAL) Database Technical Specification [Non-Patent Document 10] WINNF-TS-0061-V1.5.0 Test and Certification for Citizens Broadband Radio Service (CBRS); Conformance and Performance Test Technical Specification; SAS as Unit Under Test (UUT) [Non-Patent Document 11] WINNF-SSC-0008 Spectrum Sharing Committee Policy and Procedure Coordinated Periodic Activities Policy [Non-Patent Document 12] ITU-R P.452-11, “Prediction procedure for the evaluation of microwave interference between stations on the surface of the Earth at frequencies above about 0.7 GHz”, https: / / www.itu.int / dms_pubrec / itu-r / rec / p / R-REC-P.452-11-200304-S!!PDF-E.pdf [Non-Patent Document 13] WINNF-TR-2004-V1.0.0 Operations for Citizens Broadband Radio Service (CBRS); GAA Spectrum Coordination - Approach 2 [Non-Patent Document 14] “ET Docket No. 18-295 In the Matter of Unlicensed Use of the 6 GHz Band, Notice of Proposed Rulemaking,” FCC, 2018. [Non-Patent Document 15] “Comments of Qualcomm Incorporated”, GN Docket No. 14-177 (Sep 10, 2018) [Non-Patent Document 16] “Comments of Qualcomm Incorporated”, ET Docket No. 18-295 (Feb 15, 2019) Summary of the Invention [Problem to be solved by the invention]

[0004] To further improve the efficiency of radio wave usage, it is expected that cognitive radio technology will be used in various frequency bands. For example, it is expected that cognitive radio technology will also be used in newly released license-free bands. However, in this case, it is expected that wireless systems of various different standards will start operating in the license-free bands all at once. In this case, there will be competition between different systems, and it is possible that effective use of radio wave resources will not be achieved if a communication management device simply uses cognitive radio technology to manage the secondary use of frequencies for communication devices under its management.

[0005] Therefore, the present disclosure proposes a communication control device, a communication device, and a communication control method that can realize effective use of radio wave resources. [Means for solving the problem]

[0006] In order to solve the above problem, one form of communication control device according to the present disclosure includes an acquisition unit that acquires information of one or more communication devices, a determination unit that determines a medium reservation method for the one or more communication devices to share a specified channel based on the acquired information, and a notification unit that notifies the communication devices of the determined medium reservation method. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 10 is an explanatory diagram showing an example of allocation of interference margins to each communication device constituting a secondary system. [Figure 2] FIG. 10 is a diagram illustrating a synchronous media reservation window. [Figure 3] FIG. 1 is an explanatory diagram showing the hierarchical structure of CBRS. [Figure 4] FIG. 1 is an explanatory diagram showing the CBRS band. [Figure 5] FIG. 1 is a diagram illustrating a configuration example of a communication system according to an embodiment of the present disclosure. [Figure 6] FIG. 1 is a diagram illustrating a model in which communication control devices are distributed. [Figure 7] FIG. 1 is a diagram showing a model in which one communication control device centrally controls a plurality of communication control devices. [Figure 8] 1 is a diagram illustrating a configuration example of a radio wave utilization device according to an embodiment of the present disclosure. [Figure 9] FIG. 2 is a diagram illustrating a configuration example of a management device according to an embodiment of the present disclosure. [Figure 10] FIG. 1 is a diagram illustrating a configuration example of a terminal device according to an embodiment of the present disclosure. [Figure 11] FIG. 1 is a diagram illustrating a configuration example of a base station device according to an embodiment of the present disclosure. [Figure 12] FIG. 1 is a diagram illustrating a configuration example of a proxy device according to an embodiment of the present disclosure. [Figure 13] FIG. 1 is a diagram illustrating a configuration example of a communication control device according to an embodiment of the present disclosure. [Figure 14] FIG. 1 is an explanatory diagram illustrating an example of an interference model assumed in an embodiment of the present disclosure. [Figure 15] FIG. 10 is an explanatory diagram showing another example of an interference model assumed in an embodiment of the present disclosure. [Figure 16] FIG. 10 is an explanatory diagram for explaining a primary system protection method of simultaneous interference margin allocation type. [Figure 17] FIG. 10 is a diagram showing a state in which a residual interference margin occurs. [Figure 18] FIG. 10 is an explanatory diagram for explaining a primary system protection method of sequentially allocating interference margins. [Figure 19] FIG. 10 is a sequence diagram illustrating a registration procedure. [Figure 20] FIG. 10 is a sequence diagram illustrating an available frequency information inquiry procedure. [Figure 21] FIG. 10 is a sequence diagram for explaining a frequency use permission procedure. [Figure 22] FIG. 2 is a state transition diagram showing a permitted state of radio wave transmission. [Figure 23] FIG. 10 is a sequence diagram for explaining a frequency usage notification procedure. [Figure 24] FIG. 10 is a sequence diagram illustrating a procedure for exchanging management information. [Figure 25] FIG. 10 is a sequence diagram showing an example of an operation related to a grant. [Figure 26] FIG. 10 is a diagram showing specific processing contents of periodic processing. [Figure 27] FIG. 10 is a diagram illustrating an example of a mutual interference group. [Figure 28] FIG. 10 is a diagram illustrating another example of a mutual interference group. [Figure 29] FIG. 10 is a diagram illustrating an example of the configuration of a synchronization frame. [Figure 30] FIG. 10 is a diagram illustrating a configuration example of a CCA period. [Figure 31] FIG. 10 is a diagram for explaining a specific example of calculation of the number of medium reservation slots. [Figure 32] FIG. 10 is a diagram for explaining a specific example of calculation of the number of medium reservation slots. [Figure 33] FIG. 33 is a diagram showing an example of allocated slots in the examples of FIGS. 31 and 32. [Figure 34] FIG. 10 is a diagram showing a state in which a reserved slot is provided at the beginning of slots allocated to existing communication devices. [Figure 35] FIG. 10 is a diagram illustrating an example of the configuration of a medium synchronization reserved slot. [Figure 36] FIG. 10 is a sequence diagram showing operations related to medium reservation. [Figure 37] FIG. 10 is a sequence diagram showing operations related to medium reservation when a medium reservation coordinator is present. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the following embodiments, the same components are designated by the same reference numerals, and redundant description will be omitted.

[0009] Furthermore, in this specification and drawings, multiple components having substantially the same functional configuration may be distinguished by adding different numbers or letters after the same reference numeral. For example, multiple components having substantially the same functional configuration may be distinguished as communication control devices 601 and 602 as needed. Furthermore, multiple components having substantially the same functional configuration may be distinguished as communication systems 2A and 2B as needed. However, when there is no need to particularly distinguish between multiple components having substantially the same functional configuration, only the same reference numeral is used. For example, when there is no need to particularly distinguish between communication control devices 601 and 602, they will simply be referred to as communication control device 60. Furthermore, when there is no need to particularly distinguish between communication systems 2A and 2B, they will simply be referred to as communication system 2.

[0010] The present disclosure will be described in the following order. 1. Introduction 1-1. Control of wireless systems to achieve frequency sharing 1-2. Overview of this embodiment 1-3. Terminology related to frequencies and sharing 2.Communication System Configuration 2-1. Overall configuration of the communication system 2-2.Configuration of radio wave utilization equipment 2-3. Management device configuration 2-4. Terminal device configuration 2-5. Base station equipment configuration 2-6. Configuration of intermediate devices 2-7.Configuration of communication control device 3. Interference Model 4. Primary system protection method 4-1. Interference margin simultaneous allocation type 4-2. Interference margin sequential allocation type 5. Explanation of procedures 5-1. Registration Procedure 5-2. Procedures for inquiring about available frequency information 5-3.Frequency use permission procedures 5-4.Frequency Use Notification 5-5. Supplementary information on procedures 5-6. Procedures for terminal equipment 5-7.Procedures that occur between communication control devices 5-8. Typical operation flow 6. Operations related to medium reservation by communication control device 6-1. Application unit of media reservation method 6-2. Criteria for determining media reservation method 6-2-1. Decision Criteria 1 (Asynchronous Channel Access) 6-2-2. Decision Criterion 2 (Synchronous Channel Access) 6-3. When using synchronous channel access method 6-3-1. Example of synchronous frame configuration 6-3-2. Notification parameters 6-3-3. Media reservation slot allocation 6-3-4. Changing slot allocation 6-4.Decision making 6-4-1. Independent decision making 6-4-2. Centralized decision making 6-4-3. Decentralized decision making 7. Operations related to medium reservation in base station equipment 7-1.If you do not have the functionality of a communication control device 7-2.If the device has communication control device functionality 8. Operations related to medium reservation of terminal device 9. Media reservation sequence 9-1. Operations related to media reservation 9-2. When there is another entity that determines the information 10. Variations 11. Conclusion

[0011] <<1. Introduction>> In recent years, the wireless environment has become one in which a variety of wireless systems coexist, and the amount of content transmitted over wireless has increased and diversified, resulting in the depletion of radio wave resources (e.g., frequencies) that can be allocated to wireless systems. However, all radio wave bands are already in use by existing wireless systems, making it difficult to allocate new radio wave resources. Therefore, in recent years, attention has begun to be focused on the more effective use of radio wave resources through the use of cognitive radio technology.

[0012] Cognitive radio technology frees up radio wave resources by utilizing temporally and spatially available white space in existing wireless systems (for example, dynamic spectrum sharing (DSA: Dynamic Spectrum Access)). For example, in the United States, the federal use band (3.55-3.70 GHz), which overlaps with the frequency bands globally designated as 3GPP bands 42 and 43, is being opened up to the general public, and legislation and standardization of CBRS (Citizens Broadband Radio Service), which utilizes frequency sharing technology, is accelerating.

[0013] Cognitive radio technology not only enables dynamic spectrum sharing but also contributes to improving the frequency utilization efficiency of wireless systems. For example, ETSI EN 303 387 and IEEE 802.19.1-2014 specify coexistence technologies between wireless systems that use available radio waves.

[0014] <1-1. Control of wireless systems to achieve frequency sharing> In general, in frequency sharing, the regulatory authorities (NRAs) of each country or region are required to protect the radio systems (primary systems) of primary users who have been licensed or approved to use the frequency band. Typically, the NRA sets acceptable interference standards for the primary systems, and requires the radio systems (secondary systems) of secondary users to keep interference caused by sharing below these standards.

[0015] In the following explanation, a "system" refers to a collection of multiple components (devices, modules (components), etc.). In this case, it does not matter whether all the components are in the same housing. For example, multiple devices housed in separate housings and connected via a network, etc., and a single device in which multiple modules are housed in a single housing are both "systems." In other words, wireless systems such as a primary system and a secondary system may each be made up of multiple devices, or may each be made up of a single device.

[0016] To achieve frequency sharing, for example, a communication control device (e.g., a frequency management database) controls communication of the secondary system so as not to cause fatal interference to the primary system. The communication control device is a device that manages communication of the communication devices. For example, the communication control device is a system for managing radio wave resources (e.g., frequencies) such as a GLDB (Geo-location Database) or an SAS (Spectrum Access System). In this embodiment, the communication control device corresponds to a communication control device 60, which will be described later. The communication control device 60 will be described in detail later.

[0017] Here, the primary system is, for example, a system (e.g., an existing system) that uses a predetermined frequency band preferentially over other systems such as a secondary system. Also, the secondary system is, for example, a system that makes secondary use (e.g., dynamic frequency sharing) of the frequency band used by the primary system. The primary system and the secondary system may each be composed of multiple communication devices, or may be composed of a single communication device. The communication control device allocates an interference allowance to one or more communication devices so that the accumulation of interference (Interference Aggregation) to the primary system from one or more communication devices constituting the secondary system does not exceed the interference allowance (also referred to as interference margin) of the primary system. In this case, the interference allowance may be an amount of interference predetermined by the operator of the primary system, a public institution that manages radio waves, or the like. In the following description, the term "interference margin" refers to the interference allowance. The accumulation of interference may also be referred to as "cumulative interference power."

[0018] FIG. 1 is an explanatory diagram showing an example of the allocation of interference margins to communication devices constituting a secondary system. In the example of FIG. 1, communication system 1 is a primary system, and communication system 2 is a secondary system. Communication system 1 includes radio wave utilizing device 101 and the like. Communication system 2 includes base station devices 401, 402, 403 and the like. Note that in the example of FIG. 1, communication system 1 includes only one radio wave utilizing device 10, but communication system 1 may include multiple radio wave utilizing devices 10. Also, in the example of FIG. 1, communication system 2 includes three base station devices 40, but communication system 2 may include fewer or more than three base station devices 40. Also, the radio communication devices included in communication system 2 do not necessarily have to be base station devices. Note that in the example of FIG. 1, only one primary system (communication system 1 in the example of FIG. 1) and one secondary system (communication system 2 in the example of FIG. 1) are shown, but there may be multiple primary systems and multiple secondary systems.

[0019] The radio wave utilizing device 101 and the base station devices 401, 402, and 403 are each capable of transmitting and receiving radio waves. The amount of interference that the radio wave utilizing device 101 tolerates is I accept The amounts of interference that the base station devices 401, 402, and 403 inflict on predetermined protection points of the communication system 1 (primary system) are I1, I2, and I3, respectively. Here, the protection points are interference calculation reference points for protecting the communication system 1.

[0020] The communication control device determines whether the cumulative interference (received interference amount I1+I2+I3 shown in FIG. 1) at a predetermined protection point of the communication system 1 is equal to or greater than the interference margin I accept In order not to exceed the interference margin I accept For example, the communication control device allocates I1, I2, and I3 to the accept Each base station device 40 is assigned an interference margin I accept Alternatively, the communication control device allocates I1, I2, and I3 to the accept Each base station device 40 is assigned an interference margin I accept Of course, the method of allocating the interference margin is not limited to this example.

[0021] Based on the allocated amount of interference (hereinafter referred to as allocated interference amount), the communication control device calculates the maximum transmission power (hereinafter referred to as maximum allowable transmission power) that is permitted for each base station device 40. For example, the communication control device calculates the maximum allowable transmission power for each base station device 40 by back-calculating from the allocated amount of interference based on propagation loss, antenna gain, etc. Then, the communication control device notifies each base station device 40 of information on the calculated maximum allowable transmission power.

[0022] <1-2. Overview of this embodiment> In recent years, the 6 GHz band has been attracting attention as a new shared band. For example, the FCC announced that it would newly open up the 5,925-7,125 MHz frequency band for unlicensed use, as described in Non-Patent Document 14. In Europe, CEPT SE45 is also conducting discussions on sharing the 5,925-6,425 MHz frequency band.

[0023] When 3GPP standardized Licensed Assisted Access (LAA) using LTE in unlicensed bands, coexistence issues with WLAN (Wireless LAN) operating in the 5 GHz band were discussed. For 5G NR, standardization discussions for NR-U (NR Unlicensed) are underway, and similar discussions are expected. However, the 6 GHz band, which is expected to be newly opened in the future, is a so-called "Greenfield" band, and there is a possibility that various different wireless systems will begin operating simultaneously at the same time as the unlicensed opening of the 6 GHz band. Therefore, there is a need for technology development that can achieve coexistence between different wireless systems while improving frequency utilization efficiency beyond the LBT (Listen Before Talk) method that has traditionally been used to achieve coexistence between different wireless systems.

[0024] Meanwhile, in opening up the 6 GHz band, the FCC is proposing the introduction of a system called Automated Frequency Coordination (AFC), a type of frequency management database that has traditionally been used in frequency sharing, to assist with secondary frequency usage.

[0025] Therefore, in order to improve frequency utilization efficiency, it is important to combine secondary frequency utilization management using a frequency management database with coexistence technology between different wireless systems.

[0026] Non-Patent Documents 15 and 16 cite synchronization between heterogeneous wireless systems as a challenge for coexistence between heterogeneous wireless systems. To address this issue, they propose a concept called synchronized medium reservation windows, which applies a common synchronization reference between heterogeneous wireless systems. Figure 2 is a diagram illustrating the synchronized medium reservation window. This allows a periodic medium reservation period to be set, allowing access points and clients to reserve the medium until the start of the next medium reservation period. Here, the medium refers to, for example, a frequency band. According to Non-Patent Document 15, this can be achieved by having the receiver transmit an active reception indication signal that can be detected by nearby transmitters. Meanwhile, the active slots (access slots) within the medium reservation window (medium reservation window) are flexible, allowing them to be random, deterministic, or partially random. However, Non-Patent Document 15 does not disclose how these slots are determined.

[0027] Basically, communication devices such as access points and client terminals cannot know information about neighboring communication devices. Therefore, it is difficult to improve frequency efficiency by applying the technology shown in Figure 2 to communication devices. In other words, in an environment where different wireless systems coexist in the same frequency band, all communication devices have no choice but to use the conventional LBT (Listen Before Talk) method, which means that the frequency band will be shared with low frequency utilization efficiency as before.

[0028] Therefore, in this embodiment, the communication control device acquires information about a plurality of communication devices that use a predetermined frequency band (for example, a predetermined unlicensed band). For example, the communication control device acquires information indicating whether the communication devices are capable of synchronization.

[0029] Then, the communication control device determines a medium reservation method for the plurality of communication devices to share a predetermined frequency band based on the acquired information. For example, if there is a communication device among the plurality of communication devices that cannot synchronize with other communication devices, the communication control device determines an asynchronous channel access method (e.g., LBT) as the medium reservation method. On the other hand, if all of the plurality of communication devices are synchronous communication devices, the communication control device determines a synchronous channel access method (e.g., the medium reservation method using the above-mentioned medium reservation window) as the medium reservation method.

[0030] The communication control device then notifies the communication device of the determined medium reservation method, and the communication device uses the predetermined frequency band in the notified medium reservation method.

[0031] This allows for efficient medium reservation, resulting in effective use of radio wave resources.

[0032] <1-3. Terminology related to frequencies and sharing> The outline of this embodiment has been described above, and the present embodiment will now be described in detail. Before proceeding to the detailed description of this embodiment, in order to facilitate understanding of this embodiment, the terms related to frequencies and sharing used in this embodiment will be clarified.

[0033] In this embodiment, the primary system (e.g., communication system 1) and the secondary system (e.g., communication system 2) are assumed to be in a dynamic frequency sharing environment. Hereinafter, terms related to frequencies and sharing will be explained using the example of CBRS (Citizens Broadband Radio Service) legislated by the FCC (Federal Communications Commission) in the United States. Note that the communication systems 1 and 2 of this embodiment are not limited to systems under CBRS.

[0034] FIG. 3 is an explanatory diagram showing a hierarchical structure in CBRS. As shown in FIG. 3, each user of a frequency band is classified into one of three groups. These groups are called "tiers." Each of the three groups has a defined hierarchical structure consisting of an incumbent tier, a priority access tier, and a general authorized access tier. In this hierarchical structure, the priority access tier is located above the general authorized access tier, and the incumbent tier is located above the priority access tier. Taking CBRS as an example, for example, a system located in the incumbent tier (incumbent system) is a primary system, and systems located in the general authorized access tier and the priority access tier are secondary systems.

[0035] The Incumbent Tier is a group consisting of incumbent users of the shared frequency band. In CBRS, the Department of Defense (DOD), fixed satellite operators, and Grandfathered Wireless Broadband Licensees (GWBLs) are defined as incumbent users. The Incumbent Tier is not required to avoid or suppress interference with the Priority Access Tier and General Authorized Access Tier (GAA Tier), which have lower priority. The Incumbent Tier is also protected from interference by the Priority Access Tier and General Authorized Access Tier (GAA Tier). In other words, users of the "Incumbent Tier" can use the frequency band without considering the existence of other groups.

[0036] The Priority Access Tier is a group of users with a license called a Priority Access License (PAL). The Priority Access Tier is required to avoid or suppress interference with incumbent tiers with higher priority, but is not required to avoid or suppress interference with general authorized access tiers (GAA tiers) with lower priority. The Priority Access Tier is not protected from interference by incumbent tiers with higher priority, but is protected from interference by general authorized access tiers with lower priority.

[0037] The General Authorized Access Tier (GAA Tier) is a group consisting of all other users that do not belong to the Incumbent Tier or Priority Access Tier. It is required to avoid or suppress interference with the Incumbent Tier and Priority Access Tier, which have higher priority. Furthermore, the General Authorized Access Tier (GAA Tier) is not protected from interference by the Incumbent Tier or Priority Access Tier, which have higher priority. In other words, the General Authorized Access Tier (GAA Tier) is a "tier" that requires opportunistic spectrum usage under the law.

[0038] Note that the hierarchical structure is not limited to these definitions. CBRS is generally referred to as a three-tier structure, but it may also be a two-tier structure. Typical examples include two-tier structures such as LSA (Licensed Shared Access) and TVWS (TV band White Space). LSA employs a structure equivalent to a combination of the existing layer (Incumbent Tier) and Priority Access Tier. TVWS employs a structure equivalent to a combination of the existing layer (Incumbent Tier) and General Authorized Access Tier (GAA Tier). Four or more tiers may also exist. Specifically, for example, an intermediate layer equivalent to the Priority Access Tier may be further prioritized. For example, the General Authorized Access Tier (GAA Tier) may also be prioritized in a similar manner.

[0039] FIG. 4 is an explanatory diagram showing the CBRS band. Taking the above-mentioned CBRS as an example, the primary system is a military radar system, a grandfathered wireless system, or a fixed satellite service (space-to-earth). Here, the military radar system is typically a shipboard radar. The secondary system is a wireless network system consisting of base stations and terminals called Citizens Broadband Radio Service Devices (CBSDs) and End User Devices (EUDs). Secondary systems also have priorities, and a priority access license (PAL) that allows licensed use of the shared band, and a general authorized access (GAA) that is equivalent to an unlicensed system, are defined. Tier 1 in FIG. 4 corresponds to the existing layer shown in FIG. 3. Tier 2 in FIG. 4 corresponds to the priority access layer shown in FIG. 3. 4 corresponds to the general authorized access layer shown in FIG.

[0040] The primary system and the secondary system are not limited to the above examples. For example, a wireless system included in the Priority Access Tier may be considered as the primary system, and a system included in the General Authorized Access Tier (GAA Tier) may be considered as the secondary system.

[0041] The primary system (communication system 1) of this embodiment is not limited to the example shown in FIG. 4 . Other types of wireless systems may be used as the primary system (communication system 1). For example, other wireless systems may be used as the primary system depending on the country, region, and frequency band to which they are applied. For example, the primary system may be a television broadcasting system such as a DVB-T (Digital Video Broadcasting-Terrestrial) system. The primary system may also be a wireless system known as an FS (Fixed System). The primary system may also be a frequency sharing system in other frequency bands. Typical examples include LSA and TV band White Space (TVWS). The primary system may also be a cellular communication system such as LTE (Long Term Evolution) or NR (New Radio). The primary system may also be an aviation wireless system such as ARNS (Aeronautical Radio Navigation Service). Of course, the primary system is not limited to the above wireless systems and may be other types of wireless systems.

[0042] Furthermore, the white space used by the communication system 2 is not limited to radio waves in the federal use band (3.55-3.70 GHz). The communication system 2 may use radio waves in a frequency band other than the federal use band (3.55-3.70 GHz) as the white space. For example, if the primary system (communication system 1) is a television broadcasting system, the communication system 2 may be a system that uses TV white space as the white space. Here, TV white space refers to a frequency band that is not used by a television broadcasting system (primary system) among frequency channels allocated to the television broadcasting system. In this case, the TV white space may be a channel that is not used depending on the region.

[0043] Furthermore, the relationship between the communication systems 1 and 2 is not limited to a frequency sharing relationship in which the communication system 1 is the primary system and the communication system 2 is the secondary system. The relationship between the communication systems 1 and 2 may be a network coexistence relationship between the same or different wireless systems using the same frequency.

[0044] Generally, in frequency sharing, an existing system that uses a target band is called a primary system, and a system of a secondary user is called a secondary system. However, when this embodiment is applied to an environment other than frequency sharing, these (primary system, secondary system) may be replaced with other terms for systems. For example, a macro cell in a HetNet may be called a primary system, and a small cell or relay station may be called a secondary system. Also, a base station may be called a primary system, and Relay UE or Vehicle UE that realizes D2D or V2X within its coverage may be called a secondary system. The base station is not limited to a fixed type, and may be a portable / mobile type. In such a case, for example, the communication control device provided by the present invention may be provided in a base station, a relay station, Relay UE, etc.

[0045] Note that the term "frequency" used in the following description may be replaced with another term, such as "resource," "resource block," "resource element," "channel," "component carrier," "Bandwidth Part (BWP)," "carrier," "subcarrier," "beam," or terms having similar meanings.

[0046] <<2. Communication System Configuration>> A communication system 1000 according to an embodiment of the present disclosure will be described below. The communication system 1000 includes a communication system 1 and a communication system 2. The communication system 1 (first wireless system) is a wireless communication system that performs wireless communication by using (primary use) a predetermined frequency band. The communication system 2 (second wireless system) is a wireless communication system that performs wireless communication by using (secondary use) the frequency band used by the communication system 1. For example, the communication system 2 is a wireless communication system that dynamically shares available radio waves of the communication system 1. The communication system 2 provides wireless services to users or devices owned by the users using a predetermined radio access technology.

[0047] Here, the communication systems 1 and 2 may be cellular communication systems such as W-CDMA (Wideband Code Division Multiple Access), cdma2000 (Code Division Multiple Access 2000), LTE, and NR. In the following description, "LTE" includes LTE-Advanced (LTE-A), LTE-A Pro (LTE-Advanced Pro), and EUTRA (Evolved Universal Terrestrial Radio Access). Furthermore, "NR" includes NRAT (New Radio Access Technology) and FEUTRA (Further EUTRA).

[0048] NR is the next generation (5th generation) radio access technology (RAT) after LTE, and is a radio access technology that can support various use cases, including eMBB (Enhanced Mobile Broadband), mMTC (Massive Machine Type Communications), and URLLC (Ultra-Reliable and Low Latency Communications).

[0049] The communication systems 1 and 2 are not limited to cellular communication systems. For example, the communication system 2 may be another wireless communication system such as a wireless LAN (Local Area Network) system, a television broadcasting system, an aviation wireless communication system, or a space wireless communication system.

[0050] In this embodiment, the communication system 1 is a primary system, and the communication system 2 is a secondary system. As described above, there may be a plurality of communication systems 1 and a plurality of communication systems 2. In the example of FIG. 1, the communication system 1 is configured by one radio wave utilizing device 10 (radio wave utilizing device 101 shown in FIG. 1), but as described above, the communication system 1 may be configured by a plurality of radio wave utilizing devices 10. The configuration of the radio wave utilizing device 10 may be the same as or different from the configuration of a base station device 40 or a terminal device 30, which will be described later.

[0051] <2-1. Overall configuration of the communication system> The communication system 1000 typically comprises the following entities: Communication devices (e.g., radio wave utilization devices, base station devices, intermediate devices) terminal device Management device (e.g., communication control device)

[0052] In the following description, entities that become communication devices are assumed to be radio wave utilizing devices 10, base station devices 40, and intermediate devices 50, but entities that become communication devices are not limited to these devices and may be other communication devices (e.g., management device 20, terminal device 30, communication control device 60). For example, an external device described below may be considered as part of the communication system 1000. Of course, an external device does not have to be part of the communication system 1000. Furthermore, terminal device 30 may be considered as an external device.

[0053] 5 is a diagram illustrating a configuration example of a communication system 1000 according to an embodiment of the present disclosure. As described above, the communication system 1000 includes a communication system 1 and a communication system 2. Note that the devices in the diagram can also be considered as devices in a logical sense. In other words, some of the devices in the diagram may be realized by a virtual machine (VM), a container, a Docker, or the like, and these may be physically implemented on the same hardware.

[0054] The communication system 1 includes a radio wave using device 10 and a management device 20. In the example of FIG. 5, the communication system 1 includes radio wave using devices 101 and 102 and a management device 20 that manages them. Note that the communication system 1 does not necessarily have to include the management device 20. The communication system 1 may include multiple radio wave using devices 10, or may include only one radio wave using device 10. In the example of FIG. 5, each of the radio wave using devices 101 and 102 can also be considered as one communication system 1.

[0055] Communication system 2 includes terminal device 30, base station device 40, intermediate device 50, and communication control device 60. In the example of FIG. 5, communication system 2 includes communication system 2A and communication system 2B. Communication system 2A includes communication system 2a1, communication system 2a2, and communication system 2a3. Communication system 2a1 includes terminal device 301 and base station device 401. Communication system 2a2 includes terminal device 302, base station devices 402-403, and intermediate device 501. Communication system 2a3 includes terminal devices 302-304, base station devices 404-405, and intermediate device 502. Communication system 2B includes terminal device 305 and base station device 406.

[0056] Note that the communication system 2 does not necessarily have to include the communication control device 60. Explaining this using the example of FIG. 5 , the communication system 2a2 and the communication system 2a3 each having an external communication control device 60 may be regarded as one communication system 2. Also, the communication system 2 does not necessarily have to include the intermediate device 50. In the example of FIG. 5 , the communication system 2a1, which does not have the intermediate device 50, may be regarded as one communication system 2.

[0057] The communication systems 1 and 2 provide wireless services to users or devices owned by the users by the cooperation of the devices (for example, communication devices such as wireless communication devices) that make up the communication systems 1 and 2. A wireless communication device is a device that has a wireless communication function. In the example of FIG. 5, the radio wave utilizing device 10, the base station device 40, and the terminal device 30 correspond to wireless communication devices.

[0058] It should be noted that intermediate device 50 and communication control device 60 may have a wireless communication function. In this case, intermediate device 50 and communication control device 60 can also be considered as wireless communication devices. In the following description, a wireless communication device may be simply referred to as a communication device. It should be noted that a communication device is not limited to a wireless communication device; for example, a device that does not have a wireless communication function and is only capable of wired communication can also be considered as a communication device.

[0059] In this embodiment, the concept of a "communication device" includes not only portable mobile devices such as mobile terminals (for example, terminal devices), but also devices installed in structures or mobile bodies. The structures or mobile bodies themselves may be considered communication devices. The concept of a communication device also includes not only terminal devices, but also base station devices and relay devices. A communication device is a type of processing device and information processing device. The term "communication device" used in the following description can be appropriately replaced with "transmitting device" or "receiving device." In this embodiment, the concept of "communication" includes "broadcasting." In this case, the term "communication device" can be appropriately replaced with "broadcasting device." Of course, the term "communication device" can also be appropriately replaced with "transmitting device" or "receiving device."

[0060] The communication system 2 may include a plurality of terminal devices 30, base station devices 40, communication control devices 60, and intermediate devices 50. In the example of Fig. 5, the communication system 2 includes terminal devices 301, 302, 303, 304, 305, etc. as the terminal devices 30. The communication system 2 also includes base station devices 401, 402, 403, 404, 405, etc. as the base station devices 40. 5、 406, etc. The communication system 2 also includes communication control devices 601, 602, etc. as the communication control device 60.

[0061] In the following description, a wireless communication device may be referred to as a wireless system. For example, each of the terminal devices 301 to 305 is a wireless system. Also, each of the radio wave utilizing device 10 and the base station devices 401 to 406 is a wireless system. In the following description, the communication system 1 is referred to as a first wireless system, but each of one or more radio wave utilizing devices 10 included in the communication system 1 may be considered as a first wireless system. Also, in the following description, each of one or more base station devices 40 included in the communication system 2 is referred to as a second wireless system, but the communication system 2 itself may be considered as a second wireless system, or each of one or more terminal devices 30 included in the communication system 2 may be considered as a second wireless system. If the intermediate device 50 and the communication control device 60 have a wireless communication function, each of the intermediate device 50 or each of the communication control device 60 may be considered as a second wireless system.

[0062] Note that the wireless system may be a single system configured with a plurality of communication devices including at least one wireless communication device. For example, a system configured with one or a plurality of base station devices 40 and one or a plurality of terminal devices 30 subordinate thereto may be regarded as a single wireless system. Also, communication system 1 or communication system 2 may each be regarded as a single wireless system. In the following description, a communication system configured with a plurality of communication devices including at least one wireless communication device may be referred to as a wireless communication system or simply as a communication system. Note that a system configured with a plurality of communication devices including one wireless communication device may be regarded as a first wireless system or a second wireless system.

[0063] In this embodiment, a system refers to a collection of multiple components (devices, modules (components), etc.). In this case, all of the components that make up the system may or may not be in the same housing. For example, multiple devices housed in separate housings and connected via wires and / or wirelessly are one system. Also, one device in which multiple modules are housed in one housing is one system.

[0064] [Radio wave utilization device] The radio wave utilizing device 10 is a wireless communication device that constitutes the communication system 1 (primary system). The radio wave utilizing device 10 may be a radio wave emitting device such as a radar or a reflected wave receiving device. As described above, the primary system is, for example, a military radar system, an existing system (for example, a television broadcasting system or an existing cellular communication system), or a system for fixed satellite services.

[0065] If the communication system 1 is a military radar system, the radio wave utilization device 10 is, for example, a shipboard radar. If the communication system 1 is a television broadcasting system, the radio wave utilization device 10 is, for example, a broadcasting station (broadcasting station as equipment) such as a broadcast relay station. If the communication system 1 is a system for fixed satellite services, the radio wave utilization device 10 is, for example, a parabolic antenna that receives radio waves from an artificial satellite. Of course, the radio wave utilization device 10 is not limited to these. For example, if the communication system 1 is an existing cellular communication system, the radio wave utilization device 10 may be a base station device.

[0066] The radio wave utilizing device 10 may be capable of communicating with other communication devices using a wireless access technology, similar to the base station device 40 described below. In this case, the wireless access technology used by the radio wave utilizing device 10 may be cellular communication technology or wireless LAN technology. Of course, the wireless access technology used by the base station device 40 is not limited to these and may be other wireless access technologies. For example, the wireless access technology used by the radio wave utilizing device 10 may be LPWA (Low Power Wide Area) communication technology. Here, LPWA communication refers to communication conforming to the LPWA standard. Examples of LPWA standards include ELTRES, ZETA, SIGFOX, LoRaWAN, and NB-IoT. Of course, the LPWA standard is not limited to these and may be other LPWA standards. In addition, the wireless communication used by the radio wave utilizing device 10 may be wireless communication using millimeter waves. Furthermore, the wireless communication used by the radio wave utilizing device 10 may be wireless communication using radio waves, or wireless communication using infrared or visible light (optical wireless).

[0067] In addition, the configuration of the radio wave utilizing device 10 may be the same as that of a terminal device 30 or a base station device 40 described later.

[0068] [Management device] The management device 20 is a device that manages the radio wave utilization device 10. For example, the management device 20 is a server or a database owned by an operator or manager of the communication system 1.

[0069] The management device 20 may be a server or database owned by a public institution. For example, the management device 20 may be a database (e.g., a regulatory database) managed and operated by a national or regional radio regulatory agency. An example of a regulatory database is the Universal Licensing System (ULS) operated by the Federal Communications Commissions (FCC).

[0070] Furthermore, when the communication system 1 is an existing cellular communication system, the management device 20 may be a device that manages a wireless network. For example, the management device 20 may be a device that functions as an MME (Mobility Management Entity), an AMF (Access and Mobility Management Function), or an SMF (Session Management Function).

[0071] When the communication system 2 configures a network in which the radio wave utilizing device 10 is one of the nodes, the management device 20 may be, for example, a network manager that performs integrated control of the radio wave utilizing device 10 in the network.

[0072] Of course, the management device 20 is not limited to these examples. The functions of the management device 20 may be included in the radio wave using device 10. In this case, the radio wave using device 10 can be regarded as the management device 20.

[0073] Furthermore, the management device 20 may have the function of a communication control device. In this case, the management device 20 can be regarded as the communication control device 60.

[0074] [Terminal Device] The terminal device 30 is a communication device equipped with a communication function. The terminal device 30 is typically a communication device such as a smartphone. The terminal device 30 may be a user terminal such as a mobile phone, a smart device (smartphone or tablet), a wearable device, an IoT (Internet of Things) device, a PDA (Personal Digital Assistant), or a personal computer. The terminal device 30 may also be a commercial camera equipped with a communication function, or a motorcycle or mobile broadcast van equipped with a communication device such as an FPU (Field Pickup Unit). The terminal device 30 may also be an M2M (Machine to Machine) device or an IoT (Internet of Things) device. The terminal device may also be called User Equipment, User Terminal, User Station, Mobile Terminal, Mobile Station, or the like. The terminal device 30 may also be called, for example, an MTC UE, NB-IoT UE, or Cat. M UE.

[0075] Furthermore, the terminal device 30 may be capable of sidelink communication with other terminal devices 30. When performing sidelink communication, the terminal device 30 may be able to use an automatic retransmission technique such as HARQ (Hybrid ARQ (Automatic Repeat reQuest)). Note that the wireless communication (including sidelink communication) used by the terminal device 30 may be wireless communication using radio waves, or wireless communication using infrared rays or visible light (optical wireless).

[0076] The terminal device 30 may also be a mobile device. Here, the mobile device is a mobile wireless communication device. In this case, the terminal device 30 may be a wireless communication device installed in the mobile device, or may be the mobile device itself. For example, the terminal device 30 may be a vehicle that moves on a road, such as an automobile, a bus, a truck, or a motorcycle, or a wireless communication device mounted on the vehicle. The mobile device may be a mobile terminal, or a mobile device that moves on land (in the narrow sense), underground, on water, or underwater. The mobile device may also be a mobile device that moves within the atmosphere, such as a drone or a helicopter, or a mobile device that moves outside the atmosphere, such as an artificial satellite.

[0077] The terminal device 30 may simultaneously connect to and communicate with multiple base station devices or multiple cells. For example, when one base station device supports a communication area via multiple cells (e.g., pCell, sCell), the multiple cells can be bundled together using carrier aggregation (CA), dual connectivity (DC), or multi-connectivity (MC) technology to enable communication between the base station device 40 and the terminal device 30. Alternatively, the terminal device 30 can communicate with the multiple base station devices 40 via cells of different base station devices 40 using coordinated multi-point transmission and reception (CoMP).

[0078] The terminal device 30 does not have to be used by a person. The terminal device 30 may be a sensor installed in a factory machine or building, such as a so-called MTC (Machine Type Communication). The terminal device 30 may also be an M2M (Machine to Machine) device or an IoT (Internet of Things) device. The terminal device 30 may also be a device equipped with a relay communication function, such as D2D (Device to Device) or V2X (Vehicle to Everything). The terminal device 30 may also be a device called CPE (Customer Premises Equipment) used in wireless backhaul or the like. The terminal device 30 may also be a wireless communication device installed in a mobile object, or may be the mobile object itself.

[0079] [Base station equipment] The base station device 40 (second wireless system) is a wireless communication device that wirelessly communicates with the terminal device 30 or other communication devices (other base station devices 40, other intermediate devices 50). The base station device 40 is a type of communication device. The base station device 40 is, for example, a device equivalent to a wireless base station (Base Station, Node B, eNB, gNB, etc.) or a wireless access point. When the base station device 40 is a wireless access point, the base station device 40 may be referred to as a non-3GPP access. The base station device 40 may be a wireless relay node. The base station device 40 may also be a roadside base station device such as an RSU (Road Side Unit). The base station device 40 may also be a radio device called an RRH (Remote Radio Head). The base station device 40 may also be a receiving station device such as an FPU (Field Pickup Unit). Furthermore, the base station device 40 may be an IAB (Integrated Access and Backhaul) donor node or an IAB relay node that provides wireless access lines and wireless backhaul lines by time division multiplexing, frequency division multiplexing, or space division multiplexing.

[0080] The wireless access technology used by the base station device 40 may be cellular communication technology or wireless LAN technology. Of course, the wireless access technology used by the base station device 40 is not limited to these and may be other wireless access technologies. For example, the wireless access technology used by the base station device 40 may be LPWA (Low Power Wide Area) communication technology. Here, LPWA communication refers to communication conforming to the LPWA standard. Examples of LPWA standards include ELTRES, ZETA, SIGFOX, LoRaWAN, and NB-IoT. Of course, the LPWA standard is not limited to these and may be other LPWA standards. Alternatively, the wireless communication used by the base station device 40 may be wireless communication using millimeter waves. Furthermore, the wireless communication used by the base station device 40 may be wireless communication using radio waves or wireless communication using infrared or visible light (optical wireless).

[0081] In this embodiment, a base station of a wireless communication system may be referred to as a base station device. The wireless access technology used by the base station device 40 may be cellular communication technology or wireless LAN technology. Of course, the wireless access technology used by the base station device 40 is not limited to these and may be other wireless access technologies. Furthermore, the wireless communication used by the base station device 40 may be wireless communication using radio waves or wireless communication using infrared rays or visible light (optical wireless).

[0082] Base station device 40 does not necessarily have to be fixed, but may be installed on a moving object such as an automobile. Furthermore, base station device 40 does not necessarily have to be located on the ground, but may be equipped with a communication device function on an object in the air or space, such as an aircraft, drone, helicopter, or satellite, or on or under the sea, such as a ship or submarine. In such cases, base station device 40 may perform wireless communication with other communication devices that are fixedly installed.

[0083] The concept of a base station device (also called a base station) includes not only a donor base station but also a relay base station (also called a relay station or a relay station device). The concept of a base station also includes an access point. Furthermore, the concept of a base station includes not only a structure equipped with the functions of a base station but also a device installed in the structure.

[0084] Examples of structures include buildings such as office buildings, houses, steel towers, station facilities, airport facilities, port facilities, stadiums, etc. The concept of a structure includes not only buildings, but also non-building structures such as tunnels, bridges, dams, fences, and steel pillars, as well as equipment such as cranes, gates, and wind turbines. The concept of a structure also includes not only land (ground in the narrow sense) or underground structures, but also structures on water such as piers and megafloats, and underwater structures such as oceanographic observation facilities.

[0085] The base station device 40 may be a donor station or a relay station (relay station). When the base station device 40 is a relay station, the device in which the base station device 40 is installed is not limited as long as it fulfills the relay function. For example, the base station device 40 may be installed in a terminal device such as a smartphone, a car or a rickshaw, a balloon, an airplane, or a drone, or may be installed in a home appliance such as a television, a game console, an air conditioner, a refrigerator, or a lighting fixture. Of course, these devices themselves may be considered as the base station device 40.

[0086] Furthermore, the base station device 40 may be a fixed station or a mobile station. A mobile station is a wireless communication device (for example, a base station device) configured to be mobile. In this case, the base station device 40 may be a device installed in a mobile body, or may be the mobile body itself. For example, a relay station device with mobility can be considered as the base station device 40 as a mobile station. Furthermore, devices that are inherently mobile and have the functions of a base station device (at least some of the functions of a base station device), such as vehicles, drones, and smartphones, also fall under the category of the base station device 40 as a mobile station.

[0087] Here, the moving body may be a mobile terminal such as a smartphone, a mobile phone, etc. Furthermore, the moving body may be a moving body that moves on land (ground in the narrow sense) (for example, a vehicle such as an automobile, bicycle, bus, truck, motorcycle, train, or linear motor car), or a moving body that moves underground (for example, in a tunnel) (for example, a subway).

[0088] Furthermore, the moving body may be a moving body that moves on water (e.g., a ship such as a passenger ship, cargo ship, or hovercraft) or a moving body that moves underwater (e.g., a submersible vessel such as a submarine, submarine, or unmanned underwater vehicle).

[0089] Furthermore, the moving body may be a moving body that moves within the atmosphere (for example, an aerial vehicle such as an airplane, airship, or drone), or a moving body that moves outside the atmosphere (for example, an artificial celestial body such as an artificial satellite, spaceship, space station, or probe). A moving body that moves outside the atmosphere can be rephrased as a space moving body.

[0090] Furthermore, the base station device 40 may be a terrestrial base station device (terrestrial station device) installed on the ground. For example, the base station device 40 may be a base station device arranged on a structure on the ground, or a base station device installed on a mobile body moving on the ground. More specifically, the base station device 40 may be an antenna installed on a structure such as a building and a signal processing device connected to the antenna. Of course, the base station device 40 may be the structure or the mobile body itself. "Ground" refers not only to land (ground in the narrow sense) but also to ground in a broad sense, including underground, on water, and underwater.

[0091] The base station device 40 is not limited to a terrestrial base station device. The base station device 40 may be a non-terrestrial base station device (non-terrestrial station device) that can fly in the air or space. For example, the base station device 40 may be an aircraft station device or a satellite station device.

[0092] An aircraft station device is a wireless communication device capable of floating in the atmosphere (including the stratosphere), such as an aircraft. The aircraft station device may be a device mounted on an aircraft, or may be the aircraft itself. The concept of aircraft includes not only heavier-than-air vehicles such as airplanes and gliders, but also lighter-than-air vehicles such as balloons and airships. The concept of aircraft also includes not only heavier-than-air vehicles and lighter-than-air vehicles, but also rotorcraft such as helicopters and autogyros. The aircraft station device (or an aircraft on which the aircraft station device is mounted) may be an unmanned aerial vehicle such as a drone.

[0093] The concept of unmanned aerial vehicles also includes unmanned aerial systems (UAS) and tethered unmanned aerial systems (TAS). The concept of unmanned aerial vehicles also includes lighter than air UAS (LTA) and heavier than air UAS (HTA). The concept of unmanned aerial vehicles also includes high altitude unmanned aerial system platforms (HAPs).

[0094] A satellite station device is a wireless communication device capable of floating outside the atmosphere. The satellite station device may be a device mounted on a space vehicle such as an artificial satellite, or may be the space vehicle itself. A satellite that serves as a satellite station device may be any of a low earth orbiting (LEO) satellite, a medium earth orbiting (MEO) satellite, a geostationary earth orbiting (GEO) satellite, and a highly elliptical orbiting (HEO) satellite. Of course, the satellite station device may be a device mounted on a low earth orbiting satellite, a medium earth orbiting satellite, a geostationary satellite, or a highly elliptical orbiting satellite.

[0095] As described above, the base station device 40 may be a relay station device. The relay station device is, for example, an aircraft station or an earth station. The relay station device can be considered a type of the above-mentioned relay device. An aircraft station is a radio station installed on the ground or on a mobile object moving on the ground to communicate with an aircraft station device. An earth station is a radio station located on the earth (including in the air) to communicate with a satellite station device. The earth station may be a large earth station or a small earth station such as a VSAT (Very Small Aperture Terminal).

[0096] The earth station may be a VSAT control earth station (also referred to as a master station or a hub station) or a VSAT earth station (also referred to as a slave station). The earth station may also be a radio station installed on a mobile object moving on the ground. For example, an earth station installed on a ship may be an earth station on board a vessel (ESV: Earth Stations on Board Vessels). The earth station may also include an aircraft earth station installed on an aircraft (including a helicopter) and communicating with a satellite station. The earth station may also include an aircraft earth station installed on a mobile object moving on the ground and communicating with the aircraft earth station via a satellite station. The relay station device may also be a portable and mobile radio station that communicates with a satellite station or an aircraft station.

[0097] The size of the coverage of the base station device 40 may be as large as a macrocell or as small as a picocell. Of course, the size of the coverage of the base station device 40 may also be extremely small, such as a femtocell. The base station device 40 may also have beamforming capabilities. In this case, the base station device 40 may form a cell or service area for each beam.

[0098] The base station device 40 may be used, operated, and / or managed by various entities. For example, the base station device 40 may be a mobile network operator (MNO), a mobile virtual network operator (MVNO), a mobile virtual network enabler (MVNE), a neutral host network (NHN) operator, an enterprise, an educational institution (a school corporation, a local government board of education, etc.), a real estate (building, condominium, etc.) manager, an individual, etc. Of course, the entities that use, operate, and / or manage the base station device 40 are not limited to these.

[0099] The base station device 40 may be installed and / or operated by a single business operator or by a single individual. Of course, the entity that installs and operates the base station device 40 is not limited to these. For example, the base station device 40 may be installed and operated jointly by multiple business operators or multiple individuals. Furthermore, the base station device 40 may be a shared facility used by multiple business operators or multiple individuals. In this case, the installation and / or operation of the facility may be performed by a third party other than the user.

[0100] The base station devices 40 operated by a carrier are typically connected to the Internet via a core network. The base station devices 40 are operated, managed, and maintained by a function called OA&M (Operation, Administration & Maintenance). The communication system 2 may include, for example, a network manager that performs integrated control of the base station devices 40 within the network.

[0101] When the radio access technology used by the base station device 40 is a cellular communication technology, multiple base station devices 40 may each form a cell. A cell provided by the base station device 40 is called, for example, a serving cell. The serving cell may include a pCell (Primary Cell) and an sCell (Secondary Cell). When dual connectivity is provided to a UE (e.g., a terminal device 30), the pCell and sCell(s) provided by a master node (MN) are called a master cell group. Examples of dual connectivity include EUTRA-EUTRA Dual Connectivity, EUTRA-NR Dual Connectivity (ENDC), EUTRA-NR Dual Connectivity with 5GC, NR-EUTRA Dual Connectivity (NEDC), and NR-NR Dual Connectivity.

[0102] Furthermore, the serving cell may include a PSCell (Primary Secondary Cell or Primary SCG Cell). That is, when dual connectivity is provided to a UE, the PSCell and sCell(s) provided by a Secondary Node (SN) are called a Secondary Cell Group (SCG).

[0103] One cell may be associated with one downlink component carrier and one uplink component carrier. Furthermore, the system bandwidth corresponding to one cell may be divided into multiple bandwidth parts (BWPs). In this case, one or multiple BWPs may be configured for a UE, and one BWP may be used by the UE as an active BWP. Furthermore, radio resources (for example, frequency band, numerology (subcarrier spacing), slot format) that the terminal device 30 can use may differ for each cell, each component carrier, or each BWP. Furthermore, one base station device 40 may provide multiple cells.

[0104] [Intermediate device] Intermediate device 50 is a device that communicates with communication control device 60 on behalf of (represents) one or more communication devices (for example, base station device 40). For example, intermediate device 50 is a proxy device (proxy system). Intermediate device 50 is also a type of communication device.

[0105] Intermediate device 50 may be a DP (Domain Proxy) defined in Non-Patent Document 2 or the like. Here, a DP refers to an entity that communicates with a communication control device such as an SAS on behalf of each of multiple CBSDs, or an entity that communicates with a communication control device such as an SAS on behalf of a network made up of multiple CBSDs. Note that intermediate device 50 is not limited to the DP defined in Non-Patent Document 2 as long as it has the function of communicating with communication control device 60 on behalf of (representing) one or multiple communication devices. A network manager that performs integrated control of base station devices 40 in a network may also be considered as intermediate device 50.

[0106] The proxy system may be configured with one device or multiple devices. Communication between intermediate device 50 and base station device 40 may be wired communication or wireless communication. Similarly, communication between intermediate device 50 and communication control device 60 may be wired communication or wireless communication.

[0107] It should be noted that the communication device that intermediate device 50 represents (depicts) is not limited to base station device 40, and may be, for example, terminal device 30. In the following description, one or more communication devices that intermediate device 50 represents (depicts) (for example, one or more base station devices 40) may be referred to as subordinate communication devices (for example, subordinate base station devices 40).

[0108] [Communication control device] The communication control device 60 is a device that manages the base station device 40. For example, the communication control device 60 is a device that controls wireless communication of the base station device 40. For example, the communication control device 60 is a device that determines communication parameters (also called operating parameters) that the base station device 40 uses and issues permission or instructions to the base station device 40.

[0109] In this case, the communication control device 60 may be a network manager that performs integrated control of wireless devices within a network. Taking ETSI EN 303 387 and IEEE 802.19.1-2014 as examples, the communication control device 60 may be a control device such as a spectrum manager / coexistence manager that controls radio interference between wireless devices. Furthermore, for example, a registered location secure server (RLSS) defined in IEEE 802.11-2016 may also be the communication control device 60. Furthermore, in a frequency sharing environment, a database (database server, device, system) such as a geo-location database (GLDB) or a spectrum access system (SAS) may also be the communication control device 60.

[0110] If the communication system 2 is a cellular communication system, the communication control device 60 may be a device constituting a core network. The core network CN is, for example, an EPC (Evolved Packet Core) or a 5GC (5G Core network). If the core network is an EPC, the communication control device 60 may be, for example, a device having a function as an MME (Mobility Management Entity). If the core network is a 5GC, the communication control device 60 may be, for example, a device having a function as an AMF (Access and Mobility Management Function) or an SMF (Session Management Function). Even if the communication system 2 is a cellular communication system, the communication control device 60 does not necessarily have to be a device constituting a core network. For example, the communication control device 60 may be a device having a function as an RNC (Radio Network Controller).

[0111] The communication control device 60 may have a gateway function. For example, if the core network is EPC, the communication control device 60 may be a device having a function as an S-GW (Serving Gateway) or a P-GW (Packet Data Network Gateway). If the core network is 5GC, the communication control device 60 may be a device having a function as a UPF (User Plane Function). The communication control device 60 may be an SMF, a PCF, a UDM, or the like. The core network CN may include an SMF, a PCF, a UDM, or the like.

[0112] The communication control device 60 does not necessarily have to be a device that constitutes a core network. For example, assume that the core network is a W-CDMA (Wideband Code Division Multiple Access) or cdma2000 (Code Division Multiple Access 2000) core network. In this case, the communication control device 60 may be a device that functions as an RNC (Radio Network Controller).

[0113] The communication control device 60 may be connected to each of the multiple base station devices 40. For example, in the case of 5GC, an N2 reference point exists between the AMF and the NG-RAN, and the AMF and the NG-RAN are logically connected to each other via the NG interface.

[0114] The communication control device 60 manages the communications of the base station device 40. For example, the communication control device 60 may manage the location of the terminal device 30 for each terminal device 30 in area units consisting of multiple cells (for example, a Tracking Area or a RAN Notification Area). Note that the communication control device 60 may grasp and manage, for each terminal device 30, which base station device 40 (or which cell) the terminal device 30 is connected to, which base station device 40 (or which cell) the terminal device 30 is located within the communication area of, etc.

[0115] Basically, the control target of the communication control device 60 is the base station device 40, but the communication control device 60 may also control the terminal devices 30 under its control. The communication control device 60 may also control multiple secondary systems. In this case, the communication system 2 can be considered as a system having multiple secondary systems.

[0116] Furthermore, a plurality of communication control devices 60 may exist in one communication system 2. Fig. 6 is a diagram showing a model in which communication control devices 60 are distributed. In this case, the plurality of communication control devices 60 (communication control devices 603 and 604 in the example of Fig. 6) exchange information on the base station devices 40 that they manage, and perform necessary frequency allocation and interference control calculations.

[0117] Furthermore, the communication control device 60 may be a master-slave type device. Fig. 7 is a diagram showing a model (a so-called master-slave type model) in which one communication control device controls multiple communication control devices in a centralized manner. In the example of Fig. 7, the communication control device 605 is the master communication control device, and the communication control devices 606 and 607 are slave communication control devices. In such a system, the master communication control device controls multiple slave communication control devices and is capable of making decisions in a centralized manner. Furthermore, the master communication control device can also delegate or revoke decision-making authority to each slave communication control device for the purpose of load balancing or the like.

[0118] In order to perform its function, the communication control device 60 may acquire necessary information from entities other than the base station device 40, the terminal device 30, and the intermediate device 50. Specifically, the communication control device 60 may acquire information necessary for protection, such as location information of the primary system, from a database (regulatory database) managed and operated by a national or regional radio regulatory agency. An example of a regulatory database is the Universal Licensing System (ULS) operated by the Federal Communications Commission. Other examples of information necessary for protection may include, for example, an out-of-band emission limit (OOBE), an adjacent channel leakage ratio (ACLR), an adjacent channel selectivity, a fading margin, and / or a protection ratio (PR). For these examples, it is desirable to use fixed numerical values ​​when legally required.

[0119] As another example, it is also possible that the communication control device 60 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, the communication control device 60 may acquire radio wave detection information of the primary system from a radio wave sensing system such as the Environmental Sensing Capability (ESC) in the US CBRS. Furthermore, if a communication device or terminal has a sensing function, the communication control device 60 may acquire radio wave detection information of the primary system from the communication device or terminal.

[0120] The configuration of each device included in the communication system 1000 and the external device will be specifically described below.

[0121] <2-2. Configuration of radio wave utilization equipment> First, the configuration of the radio wave utilization device 10 will be described. FIG. 8 is a diagram illustrating an example of the configuration of the radio wave utilization device 10 according to an embodiment of the present disclosure. The radio wave utilization device 10 is a device that primarily utilizes a predetermined frequency band. For example, the radio wave utilization device 10 is a communication device (wireless system) that performs wireless communication with other wireless communication devices. In this case, the radio wave utilization device 10 can be considered as a type of communication device. Note that the radio wave utilization device 10 may be a radio wave transmission device or a reflected wave reception device. The radio wave utilization device 10 is a type of information processing device.

[0122] The radio wave utilizing device 10 includes a processing unit 11, a storage unit 12, and a control unit 13. Note that the configuration shown in Fig. 8 is a functional configuration, and the hardware configuration may be different from this. Furthermore, the functions of the radio wave utilizing device 10 may be distributed and implemented in multiple physically separated configurations.

[0123] The processing unit 11 is a processing unit for utilizing radio waves in a predetermined frequency band. For example, the processing unit 11 is a signal processing unit that performs various processes for outputting and receiving radio waves in a predetermined frequency band. If the radio wave utilization device 10 is a wireless communication device, the processing unit 11 may be a wireless communication interface that performs wireless communication with another communication device. Here, the other communication device includes not only a communication device that performs cellular communication or the like, but also a transmitting device that transmits broadcast waves such as television broadcasts and a receiving device that receives broadcast waves.

[0124] The storage unit 12 is a data readable / writable storage device such as a dynamic random access memory (DRAM), a static random access memory (SRAM), a flash memory, a hard disk, etc. The storage unit 12 functions as a storage means of the radio wave utilization device 10.

[0125] The control unit 13 is a controller that controls each unit of the radio wave utilization device 10. The control unit 13 is realized by a processor such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). For example, the control unit 13 is realized by the processor executing various programs stored in a storage device inside the radio wave utilization device 10 using a RAM (Random Access Memory) or the like as a working area. The control unit 13 may also be realized by an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array). The CPU, MPU, ASIC, and FPGA can all be considered as controllers.

[0126] The radio wave utilizing device 10 may have the functions of the management device 20. In this case, the control unit 13 may have each of the functional blocks that the control unit of the management device 20 has.

[0127] <2-3. Management device configuration> Next, the configuration of the management device 20 will be described. Fig. 9 is a diagram illustrating an example of the configuration of the management device 20 according to an embodiment of the present disclosure. The management device 20 is a device that manages the radio wave utilizing device 10. The management device 20 may be a device that manages the radio wave output of the radio wave utilizing device 10, or may be a device that manages information such as the installation state of the radio wave utilizing device 10 and the managing entity. The management device 20 is a type of information processing device.

[0128] The management device 20 includes a communication unit 21, a storage unit 22, and a control unit 23. Note that the configuration shown in Fig. 8 is a functional configuration, and the hardware configuration may be different from this. Furthermore, the functions of the management device 20 may be distributed and implemented in multiple physically separated configurations.

[0129] The communication unit 21 is a communication interface for communicating with other devices. The communication unit 21 may be a network interface or a device connection interface. For example, the communication unit 21 may be a LAN (Local Area Network) interface such as a NIC (Network Interface Card), or a USB (Universal Serial Bus) interface configured by a USB host controller, a USB port, etc. The communication unit 21 may be a wired interface or a wireless interface. The communication unit 21 functions as a communication means of the management device 20. The communication unit 21 communicates with the radio wave utilization device 10 under the control of the control unit 23.

[0130] The storage unit 22 is a data readable / writable storage device such as a DRAM, an SRAM, a flash memory, or a hard disk. The storage unit 22 functions as a storage means of the management device 20. The storage unit 22 stores a first identifier and the like. The first identifier will be described later.

[0131] The control unit 23 is a controller that controls each unit of the management device 20. The control unit 23 is realized by a processor such as a CPU or an MPU. For example, the control unit 23 is realized by a processor executing various programs stored in a storage device inside the management device 20 using RAM or the like as a work area. The control unit 23 may also be realized by an integrated circuit such as an ASIC or an FPGA. The CPU, MPU, ASIC, and FPGA can all be considered to be controllers.

[0132] As described above, the radio wave utilizing device 10 can be regarded as the management device 20. In this case, the description of "management device 20" that appears in the following description can be replaced with "radio wave utilizing device 10" as appropriate.

[0133] <2-4. Terminal Device Configuration> Next, a description will be given of the configuration of the terminal device 30. Fig. 10 is a diagram illustrating an example configuration of the terminal device 30 according to an embodiment of the present disclosure. The terminal device 30 is a communication device (wireless system) that performs wireless communication with the base station device 40 and / or the communication control device 60. The terminal device 30 is a type of information processing device.

[0134] The terminal device 30 includes a wireless communication unit 31, a storage unit 32, an input / output unit 33, and a control unit 34. Note that the configuration shown in Fig. 10 is a functional configuration, and the hardware configuration may be different from this. Furthermore, the functions of the terminal device 30 may be distributed and implemented in multiple physically separated components.

[0135] The wireless communication unit 31 is a wireless communication interface that communicates wirelessly with other communication devices (for example, a base station device 40 and other terminal devices 30). The wireless communication unit 31 operates under the control of the control unit 34. The wireless communication unit 31 supports one or more wireless access methods. For example, the wireless communication unit 31 supports both NR and LTE. The wireless communication unit 31 may also support other wireless access methods, such as W-CDMA and cdma2000.

[0136] The wireless communication unit 31 includes a reception processing unit 311, a transmission processing unit 312, and an antenna 313. The wireless communication unit 31 may include a plurality of reception processing units 311, a plurality of transmission processing units 312, and a plurality of antennas 313. When the wireless communication unit 31 supports a plurality of wireless access methods, each unit of the wireless communication unit 31 may be configured separately for each wireless access method. For example, the reception processing unit 311 and the transmission processing unit 312 may be configured separately for LTE and NR. The configurations of the reception processing unit 311 and the transmission processing unit 312 are similar to those of the reception processing unit 411 and the transmission processing unit 412 of the base station device 40.

[0137] The storage unit 32 is a data readable / writable storage device such as a DRAM, an SRAM, a flash memory, a hard disk, etc. The storage unit 32 functions as a storage means of the terminal device 30.

[0138] The input / output unit 33 is a user interface for exchanging information with the user. For example, the input / output unit 33 is an operation device such as a keyboard, a mouse, operation keys, or a touch panel that allows the user to perform various operations. Alternatively, the input / output unit 33 is a display device such as a liquid crystal display (LCD) or an organic electroluminescence display (OLED). The input / output unit 33 may be an audio device such as a speaker or a buzzer. The input / output unit 33 may also be a lighting device such as an LED (Light Emitting Diode) lamp. The input / output unit 33 functions as input / output means (input means, output means, operation means, or notification means) of the terminal device 30.

[0139] The control unit 34 is a controller that controls each unit of the terminal device 30. The control unit 34 is realized by a processor such as a CPU or MPU. For example, the control unit 34 is realized by a processor executing various programs stored in a storage device inside the terminal device 30 using RAM or the like as a working area. The control unit 34 may be realized by an integrated circuit such as an ASIC or FPGA. The CPU, MPU, ASIC, and FPGA can all be considered as controllers. The control unit 34 may have each functional block that the control unit of the base station device 40 has.

[0140] As shown in FIG. 10, the control unit 34 includes an acquisition unit 341 and a reservation unit 342. Each block (acquisition unit 341 to reservation unit 342) constituting the control unit 34 is a functional block indicating a function of the control unit 34. These functional blocks may be software blocks or hardware blocks. For example, each of the above-mentioned functional blocks may be a software module realized by software (including a microprogram), or may be a circuit block on a semiconductor chip (die). Of course, each functional block may be a processor or an integrated circuit. The functional blocks may be configured in any manner. The control unit 34 may be configured by functional units different from the above-mentioned functional blocks.

[0141] <2-5. Base Station Equipment Configuration> Next, a configuration of the base station device 40 will be described. Fig. 11 is a diagram illustrating a configuration example of the base station device 40 according to an embodiment of the present disclosure. The base station device 40 is a communication device (wireless system) that performs wireless communication with the terminal device 30 under the control of a communication control device 60. The base station device 40 is a type of information processing device.

[0142] Base station device 40 includes a wireless communication unit 41, a storage unit 42, a network communication unit 43, and a control unit 44. Note that the configuration shown in Fig. 11 is a functional configuration, and the hardware configuration may be different from this. Furthermore, the functions of base station device 40 may be distributed and implemented in multiple physically separated devices.

[0143] The wireless communication unit 41 is a wireless communication interface that communicates wirelessly with other communication devices (for example, terminal device 30, communication control device 60, intermediate device 50, and other base station devices 40). The wireless communication unit 41 operates under the control of the control unit 44. The wireless communication unit 41 may be compatible with multiple wireless access methods. For example, the wireless communication unit 41 may be compatible with both NR and LTE. The wireless communication unit 41 may be compatible with other cellular communication methods such as W-CDMA and cdma2000. Furthermore, the wireless communication unit 41 may be compatible with a wireless LAN communication method in addition to the cellular communication method. Of course, the wireless communication unit 41 may only be compatible with one wireless access method.

[0144] The wireless communication unit 41 includes a reception processing unit 411, a transmission processing unit 412, and an antenna 413. The wireless communication unit 41 may include a plurality of reception processing units 411, a plurality of transmission processing units 412, and a plurality of antennas 413. Note that when the wireless communication unit 41 supports a plurality of wireless access methods, each unit of the wireless communication unit 41 may be configured separately for each wireless access method. For example, when the base station device 40 supports NR and LTE, the reception processing unit 411 and the transmission processing unit 412 may be configured separately for NR and LTE.

[0145] The reception processing unit 411 processes an uplink signal received via the antenna 413. The reception processing unit 411 includes a radio reception unit 411a, a demultiplexing unit 411b, a demodulation unit 411c, and a decoding unit 411d.

[0146] The radio receiving unit 411a performs down-conversion, removal of unnecessary frequency components, control of amplification level, quadrature demodulation, conversion to a digital signal, removal of guard intervals, extraction of frequency domain signals by fast Fourier transform, etc. on the uplink signal. For example, assume that the radio access method of the base station device 40 is a cellular communication method such as LTE. In this case, the demultiplexing unit 411b separates uplink channels such as PUSCH (Physical Uplink Shared Channel) and PUCCH (Physical Uplink Control Channel) and uplink reference signals from the signal output from the radio receiving unit 411a. The demodulating unit 411c demodulates the received signal using a modulation method such as BPSK (Binary Phase Shift Keying) or QPSK (Quadrature Phase Shift Keying) for the modulation symbols of the uplink channel. The modulation method used by the demodulating unit 411c may be multi-level QAM such as 16QAM (Quadrature Amplitude Modulation), 64QAM, or 256QAM. The decoding unit 411d performs a decoding process on the coded bits of the demodulated uplink channel. The decoded uplink data and uplink control information are output to the control unit 44.

[0147] The transmission processing unit 412 performs transmission processing of the downlink control information and downlink data, and includes an encoding unit 412a, a modulation unit 412b, a multiplexing unit 412c, and a radio transmission unit 412d.

[0148] The encoder 412a encodes the downlink control information and downlink data input from the controller 44 using a coding method such as block coding, convolutional coding, or turbo coding. The modulator 412b modulates the coded bits output from the encoder 412a using a predetermined modulation method such as BPSK, QPSK, 16QAM, 64QAM, or 256QAM. The multiplexer 412c multiplexes the modulation symbols of each channel and the downlink reference signal, and allocates the multiplexed signals to predetermined resource elements. The radio transmitter 412d performs various signal processing on the signal from the multiplexer 412c. For example, the radio transmitter 412d performs processing such as conversion to the time domain using fast Fourier transform, addition of a guard interval, generation of a baseband digital signal, conversion to an analog signal, quadrature modulation, up-conversion, removal of unnecessary frequency components, and power amplification. The signal generated by the transmission processor 412 is transmitted from the antenna 413.

[0149] The storage unit 42 is a data readable / writable storage device such as a DRAM, an SRAM, a flash memory, a hard disk, etc. The storage unit 42 functions as a storage means of the base station device 40. The storage unit 42 stores desired transmission power information, operating parameters, possessed resource information, etc.

[0150] The desired transmission power information is information on the transmission power that the base station device 40 requests the communication control device 60 as information on the transmission power required for transmitting radio waves.

[0151] The operating parameters are information (e.g., setting information) related to radio wave transmission operations of the base station device 40. For example, the operating parameters are information on the maximum value of transmission power (maximum allowable transmission power) allowed for the base station device 40. Of course, the operating parameters are not limited to information on the maximum allowable transmission power.

[0152] The retained resource information is information relating to the radio resources retained by the base station device 40. For example, the retained resource information is information on the radio resources currently available to the base station device 40. For example, the retained resource information is information on the amount of interference margin retained by the base station device 40 and allocated by the communication control device 60. The information on the amount retained may be information in units of resource blocks, which will be described later. In other words, the retained resource information may be information relating to resource blocks retained by the base station device 40 (for example, the amount of resource blocks retained).

[0153] The network communication unit 43 is a communication interface for communicating with other devices (e.g., communication control device 60, intermediate device 50, and other base station devices 40). For example, the network communication unit 43 is a LAN (Local Area Network) interface such as a NIC (Network Interface Card). The network communication unit 43 may be a USB (Universal Serial Bus) interface configured by a USB host controller, a USB port, etc. The network communication unit 43 may also be a wired interface or a wireless interface. The network communication unit 43 functions as a network communication means of the base station device 40. The network communication unit 43 communicates with other devices under the control of the control unit 44.

[0154] The control unit 44 is a controller that controls each unit of the base station device 40. The control unit 44 is realized by a processor such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). For example, the control unit 44 is realized by a processor executing various programs stored in a storage device inside the base station device 40 using a RAM (Random Access Memory) or the like as a working area. Note that the control unit 44 may also be realized by an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array). The CPU, MPU, ASIC, and FPGA can all be considered as controllers.

[0155] As shown in FIG. 11, the control unit 44 includes an acquisition unit 441, a determination unit 442, and a notification unit 443. Each block (acquisition unit 441 to notification unit 443) constituting the control unit 44 is a functional block indicating a function of the control unit 44. These functional blocks may be software blocks or hardware blocks. For example, each of the above-mentioned functional blocks may be a software module realized by software (including a microprogram), or may be a circuit block on a semiconductor chip (die). Of course, each functional block may be a processor or an integrated circuit. The functional blocks may be configured in any manner. The control unit 44 may be configured by functional units different from the above-mentioned functional blocks.

[0156] The control unit 34 of the terminal device 30 may have each functional block (acquisition unit 441 to notification unit 443) that the control unit 44 of the base station device 40 has. In this case, the description of "base station device 40" that appears in the following description can be replaced with "terminal device 30" as appropriate. Furthermore, the descriptions of "control unit 44," "acquisition unit 441," "determination unit 442," and "notification unit 443" that appear in the following description can also be replaced with "control unit 34" as appropriate.

[0157] <2-6. Configuration of intermediate devices> Next, a configuration of the intermediate device 50 will be described. Fig. 12 is a diagram illustrating an example configuration of the intermediate device 50 according to an embodiment of the present disclosure. The intermediate device 50 is a communication device that communicates with the base station device 40 and the communication control device 60. The intermediate device 50 is a type of information processing device.

[0158] Intermediate device 50 includes wireless communication unit 51, storage unit 52, network communication unit 53, and control unit 54. Note that the configuration shown in Fig. 12 is a functional configuration, and the hardware configuration may be different. Furthermore, the functions of intermediate device 50 may be distributed and implemented across multiple physically separated components.

[0159] The wireless communication unit 51 is a wireless communication interface that communicates wirelessly with other communication devices (e.g., base station device 40, terminal device 30, communication control device 60, and other intermediate devices 50). The wireless communication unit 51 operates under the control of the control unit 54. The wireless communication unit 51 supports one or more wireless access methods. For example, the wireless communication unit 51 supports both NR and LTE. The wireless communication unit 51 may also support other wireless access methods, such as W-CDMA and cdma2000. The configuration of the wireless communication unit 51 is the same as that of the wireless communication unit 41 of the base station device 40.

[0160] The storage unit 52 is a data readable / writable storage device such as a DRAM, an SRAM, a flash memory, or a hard disk. The storage unit 52 functions as a storage means of the intermediate device 50. The storage unit 52 may store unique information, communication parameters, etc. of each of the subordinate base station devices 40 (or terminal devices 30 further subordinate to the subordinate base station devices 40).

[0161] Network communication unit 53 is a communication interface for communicating with other devices (e.g., base station device 40, communication control device 60, and other intermediate devices 50). For example, network communication unit 53 is a LAN interface such as a NIC. Network communication unit 53 may be a USB interface configured with a USB host controller, a USB port, etc. Network communication unit 53 may also be a wired interface or a wireless interface. Network communication unit 53 functions as a network communication means of intermediate device 50. Network communication unit 53 communicates with other devices under the control of control unit 54.

[0162] Control unit 54 is a controller that controls each unit of intermediate device 50. Control unit 54 is realized by a processor such as a CPU or MPU. For example, control unit 54 is realized by a processor executing various programs stored in a storage device inside intermediate device 50 using RAM or the like as a work area. Note that control unit 54 may also be realized by an integrated circuit such as an ASIC or FPGA. A CPU, MPU, ASIC, and FPGA can all be considered to be controllers.

[0163] As shown in FIG. 12, the control unit 54 includes an acquiring unit 541, a determining unit 542, and a notifying unit 543. Each block (acquiring unit 541 to notifying unit 543) constituting the control unit 54 is a functional block indicating a function of the control unit 54. These functional blocks may be software blocks or hardware blocks. For example, each of the above-described functional blocks may be a software module realized by software (including a microprogram), or may be a circuit block on a semiconductor chip (die). Of course, each functional block may be a processor or an integrated circuit. The functional blocks may be configured in any manner. The control unit 54 may be configured in functional units different from the above-described functional blocks. The operation of each block constituting the control unit 54 will be described later.

[0164] The operation of each block (acquisition unit 541 to notification unit 543) constituting the control unit 54 may be the same as the operation of each block (acquisition unit 441 to notification unit 443) constituting the control unit 44 of the base station device 40. In this case, the description of "intermediate device 50" appearing in the following description can be replaced with "base station device 40" as appropriate. Similarly, the descriptions of "control unit 54," "acquisition unit 541," "determination unit 542," and "notification unit 543" appearing in the following description can be replaced with "control unit 44," "acquisition unit 441," "determination unit 442," and "notification unit 443" as appropriate.

[0165] <2-7. Configuration of communication control device> The communication control device 60 is a device that controls wireless communication of the base station device 40. The communication control device 60 may control wireless communication of the terminal device 30 directly or via the base station device 40. The communication control device 60 is a type of information processing device.

[0166] FIG. 13 is a diagram illustrating an example configuration of a communication control device 60 according to an embodiment of the present disclosure. The communication control device 60 includes a wireless communication unit 61, a storage unit 62, a network communication unit 63, and a control unit 64. Note that the configuration illustrated in FIG. 13 is a functional configuration, and the hardware configuration may be different. Furthermore, the functions of the communication control device 60 may be distributed and implemented in multiple physically separated configurations. For example, the communication control device 60 may be configured by multiple server devices.

[0167] The wireless communication unit 61 is a wireless communication interface that communicates wirelessly with other communication devices (e.g., base station device 40, terminal device 30, intermediate device 50, and other communication control devices 60). The wireless communication unit 61 operates under the control of the control unit 64. The wireless communication unit 61 supports one or more wireless access methods. For example, the wireless communication unit 61 supports both NR and LTE. The wireless communication unit 61 may also support other wireless access methods, such as W-CDMA and cdma2000. The configuration of the wireless communication unit 61 is the same as that of the wireless communication unit 41 of the base station device 40.

[0168] The storage unit 62 is a storage device that can read and write data, such as a DRAM, an SRAM, a flash memory, or a hard disk. The storage unit 62 functions as a storage means of the base station device 40. The storage unit 62 stores operation parameters of each of the multiple base station devices 40 that make up the communication system 2. The storage unit 62 may also store possessed resource information of each of the multiple base station devices 40 that make up the communication system 2. As described above, the possessed resource information is information related to the possession of radio resources by the base station device 40.

[0169] The network communication unit 63 is a communication interface for communicating with other devices (e.g., base station device 40, intermediate device 50, and other communication control device 60). The network communication unit 63 may be a network interface or a device connection interface. For example, the network communication unit 63 may be a LAN (Local Area Network) interface such as a NIC (Network Interface Card). The network communication unit 63 may also be a USB (Universal Serial Bus) interface configured by a USB host controller, a USB port, etc. The network communication unit 63 may also be a wired interface or a wireless interface. The network communication unit 63 functions as a communication means of the communication control device 60. The network communication unit 63 communicates with the base station device 40, the terminal device 30, and the intermediate device 50 under the control of the control unit 64.

[0170] The control unit 64 is a controller that controls each unit of the communication control device 60. The control unit 64 is realized by a processor such as a CPU or an MPU. For example, the control unit 64 is realized by a processor executing various programs stored in a storage device inside the communication control device 60 using RAM or the like as a working area. The control unit 64 may also be realized by an integrated circuit such as an ASIC or an FPGA. The CPU, MPU, ASIC, and FPGA can all be considered as controllers.

[0171] As shown in FIG. 13, the control unit 64 includes an acquisition unit 641, a determination unit 642, and a notification unit 643. Each block (acquisition unit 641 to notification unit 643) constituting the control unit 64 is a functional block indicating a function of the control unit 64. These functional blocks may be software blocks or hardware blocks. For example, each of the above-mentioned functional blocks may be a software module realized by software (including a microprogram), or may be a circuit block on a semiconductor chip (die). Of course, each functional block may be a processor or an integrated circuit. The functional blocks may be configured in any manner. The control unit 64 may be configured in functional units different from the above-mentioned functional blocks. The operation of each block constituting the control unit 64 will be described later.

[0172] The control unit 44 of the base station device 40 may have each of the functional blocks (acquisition unit 641 to notification unit 643) that the control unit 64 of the communication control device 60 has. In this case, the description of "communication control device 60" that appears in the following description can be replaced with "base station device 40" as appropriate. Furthermore, the descriptions of "control unit 64," "acquisition unit 641," "determination unit 642," and "notification unit 643" that appear in the following description can be replaced with "control unit 44," "acquisition unit 441," "determination unit 442," and "notification unit 443" as appropriate.

[0173] <<3. Interference Model>> Next, an interference model assumed in this embodiment will be described. Fig. 14 is an explanatory diagram showing an example of an interference model assumed in an embodiment of the present disclosure. Note that the term "base station device 40" that appears in the following description can be replaced with a word indicating another communication device having a wireless communication function.

[0174] The interference model shown in FIG. 14 is applied, for example, when the primary system has a service area. In the example of FIG. 14, communication system 1 (primary system) is a wireless communication system having a service area. This service area becomes, for example, the protection area of ​​communication system 1. A plurality of interference calculation reference points (hereinafter referred to as interference calculation points or protection points) are set in the protection area. Protection points are set, for example, by the operator of communication system 1 or a public institution that manages radio waves (hereinafter referred to as the administrator). For example, the administrator may divide the protection area into a grid and set the center of a predetermined grid as the protection point. The method of determining protection points is arbitrary.

[0175] Note that protection points may be set not only in the horizontal direction but also in the vertical direction. That is, protection points may be arranged three-dimensionally. In the following description, protection points arranged three-dimensionally (that is, protection points not based on the assumption of a horizontal plane but based on the assumption of a three-dimensional space) may be referred to as spatial protection points.

[0176] The interference margin of each protection point is set by an administrator or the like. Fig. 14 shows the interference that multiple base station devices 40 constituting a communication system 2 (secondary system) cause to protection points. A communication control device 60 of the communication system 2 controls the transmission power of the multiple base station devices 40 so that the cumulative interference at each protection point does not exceed the set interference margin.

[0177] Fig. 15 is an explanatory diagram showing another example of an interference model assumed in an embodiment of the present disclosure. The interference model shown in Fig. 15 is applied, for example, when the primary system performs only reception. In the example of Fig. 15, a communication system 1 (primary system) has a receiving antenna as a radio wave utilization device 102. The radio wave utilization device 102 is, for example, a receiving antenna of a satellite earth station. A communication control device 60 of a communication system 2 sets the position of the receiving antenna as a protection point and controls the transmission power of multiple base station devices 40 so that the cumulative interference at that point does not exceed the interference margin.

[0178] <<4. Primary system protection method>> Next, the primary system protection method will be described. As described above, the primary system protection method can be classified into, for example, the following two types. (1) Interference margin simultaneous allocation type (2) Interference margin sequential allocation type

[0179] An example of a primary system protection method of simultaneous interference margin allocation type is the method (e.g., a method for calculating the maximum allowable EIRP) disclosed in Non-Patent Document 3. An example of a primary system protection method of sequential interference margin allocation type is the iterative allocation process (IAP) disclosed in Non-Patent Document 6.

[0180] The following describes the "interference margin simultaneous allocation type" primary system protection method and the "interference margin sequential allocation type" primary system protection method. Note that the term "base station device 40" that appears in the following description can be replaced with a word that indicates another communication device having a wireless communication function.

[0181] <4-1. Interference margin simultaneous allocation type> First, the primary system protection method of the simultaneous interference margin allocation type will be described. Fig. 16 is an explanatory diagram for explaining the primary system protection method of the simultaneous interference margin allocation type. As described above, in the simultaneous interference margin allocation type, the communication control device 60 calculates the maximum allowable transmission power of the secondary system using as a reference value "a value that is uniquely determined by the positional relationship between the protection reference point of the primary system and the secondary system." In the example of Fig. 16, the allowable interference threshold of the primary system is I accept This threshold value may be an actual threshold value, or may be a value set with a certain margin (for example, a protection ratio) from the actual threshold value in consideration of calculation errors and interference fluctuations.

[0182] In the interference margin simultaneous allocation type primary system protection method, interference control means determining the transmission power (EIRP, conducted power + antenna gain, etc.) of wireless devices so as not to exceed the tolerable interference threshold. In this case, if there are many base station devices 40 and each of them is controlled not to exceed the tolerable interference threshold, there is a risk that the interference power received in the communication system 1 (primary system) will exceed the tolerable interference threshold. Therefore, the interference margin (tolerable interference amount) is "allocated" based on the number of base station devices 40 registered in the communication control device 60.

[0183] For example, in the example of FIG. 16, the total number of base station devices 40 is 5. Therefore, each accept The base station device 40 is allocated an allowable interference amount of 1 / 5. Since the base station device 40 cannot recognize this allocation amount by itself, it recognizes it through the communication control device, or obtains the transmission power determined based on this allocation amount. Since the communication control device cannot recognize the number of wireless devices managed by other communication control devices, it can recognize the total number by exchanging information with other communication control devices, and can allocate the allowable interference amount. For example, in the communication control device 601, 3I accept A tolerance of / 5 is assigned.

[0184] In this method, the interference margin not used by the base station device 40 can become a surplus interference margin. FIG. 17 is a diagram showing the state in which the surplus interference margin is generated. FIG. 17 shows the total interference amount set for each of the two communication control devices 60 (communication control devices 603 and 604). FIG. 17 also shows the total interference amount set for each of the multiple base station devices 40 (base station devices 407 to 408) under the control of the two communication control devices 60. 11 ) to a predetermined protection point in the communication system 1 (amount of interference). The amount of interference obtained by subtracting the amount of interference caused by the base station device 40 from the total amount of interference caused by each of the two communication control devices 60 is the residual interference margin. In the following description, the remaining amount of interference is referred to as the residual interference margin. The residual interference margin can be rephrased as the amount of residual interference.

[0185] <4-2. Interference margin sequential allocation type> Next, a primary system protection method of the sequential interference margin allocation type will be described. As described above, in the sequential interference margin allocation type, the communication control device 60 calculates the maximum allowable transmission power of the secondary system using the "desired transmission power of the secondary system" as a reference value. Fig. 18 is an explanatory diagram for explaining the primary system protection method of the sequential interference margin allocation type. In the sequential interference margin allocation type, for example, each of the multiple base station devices 40 stores desired transmission power information in the storage unit 42. The desired transmission power information is information on transmission power that the base station device 40 requests from the communication control device 60 as information on transmission power required for transmitting radio waves. In the example of Fig. 18, the base station device 40 12 ~40 15 The communication control device 60 controls the base station device 40 based on the desired transmission power information A to D. 12 ~40 15 Interference amounts A to D are assigned to the respective

[0186] <<5. Explanation of Procedures>> Next, we will explain various procedures that may occur between entities of the communication system 2. Note that the description of the base station device 40 that appears in the following explanation can be replaced with a word indicating another communication device having a wireless communication function.

[0187] <5-1. Registration Procedure> The registration procedure is a procedure for registering device parameters related to the base station device 40 in the communication control device 60. Typically, the registration procedure is initiated when the base station device 40 or one or more communication systems including multiple base station devices 40 notifies the communication control device 60 of a registration request including the device parameters. The registration request may be sent by a communication system acting on behalf of (representing) one or more base station devices 40 (for example, a proxy system such as the intermediate device 50).

[0188] In the following description, the communication system acting on behalf of (representing) multiple base station devices 40 is assumed to be intermediate device 50, but the term intermediate device 50 appearing in the following description can be replaced with a term indicating a communication system acting on behalf of (representing) other communication devices, such as a proxy system. Of course, the description of base station device 40 can also be replaced with a term indicating other communication devices having wireless communication capabilities.

[0189] [Details of required parameters] The device parameters refer to, for example, the following information: Communication device specific information Location information Antenna Information Radio Interface Information legal information Installer information In practice, information other than these may be treated as device parameters.

[0190] The information specific to the communication device is information that can identify the base station device 40, information related to the hardware of the base station device 40, etc. For example, it may include a serial number, a product model number, etc.

[0191] The information that can identify the base station device 40 refers to communication device user information, communication device serial number, etc. For example, the communication device user information can be a user ID, a call sign, etc. The user ID may be generated independently by the communication device user, or may be issued in advance by the communication control device 60.

[0192] The information related to the hardware of the base station device 40 may include, for example, transmission power class information, manufacturer information, etc. For example, in FCC CFR Part 96, two types of classes, Category A and Category B, are defined, and the transmission power class information may include information on either of these. Also, 3GPP TS 36.104 and TS 38.104 define several classes for eNodeB and gNodeB, and these may also be used.

[0193] The information related to the software of the base station device 40 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 60. It may also include version information and build number of the software required to operate as the base station device 40.

[0194] The location information is typically information that can identify the geographical location of the base station device 40. For example, it 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, it may include information regarding latitude, longitude, altitude, and positioning error. Alternatively, it may be location information registered in an information management device managed by, for example, the National Regulatory Authority (NRA) or an agency entrusted by it. Alternatively, it may be, for example, coordinates of the X-axis, Y-axis, and Z-axis with a specific geographical location as the origin. In addition, an identifier indicating indoors or outdoors may be assigned to such coordinate information.

[0195] The location information may also be information indicating the area in which the base station device 40 is located. For example, information determined by the government, such as a postal code or an address, may be used. Alternatively, the area may be indicated by a set of three or more geographic coordinates. Such information indicating the area may be provided together with the coordinate information.

[0196] Furthermore, when the base station device 40 is located indoors, the location information may be provided with information indicating the floor of the building. For example, the number of floors, an identifier indicating above ground / underground, etc. may be provided. Furthermore, for example, information indicating a further enclosed space indoors, such as a room number and a room name within the building, may be provided.

[0197] The positioning function is preferably typically provided by the base station device 40. However, depending on the performance of the positioning function and the installation location, it is not always possible to obtain position information that satisfies the required accuracy. Therefore, the positioning function may be used by an installer. In such a case, it is preferable that the position information measured by the installer be written to the base station device 40.

[0198] The antenna information is typically information indicating the performance, configuration, etc. of an antenna provided in the base station device 40. Typically, the information may include, for example, information such as antenna installation height, tilt angle (Downtilt), horizontal direction (Azimuth), boresight, antenna peak gain, and antenna model.

[0199] The antenna information may also include information about the beams that can be formed, such as beam width, beam pattern, and analog / digital beamforming capabilities.

[0200] The antenna information may also include information about 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. It may also include information about the codebook to be used and weight matrix information (unitary matrices obtained by SVD (Singular Value Decomposition), EVD (Eigen Value Decomposition), BD (Block Diagonalization), etc., ZF (Zero-Forcing) matrices, MMSE (Minimum Mean Square Error) matrices, etc. Furthermore, when a maximum likelihood detection (MLD) or other method requiring nonlinear calculations is provided, information indicating this may also be included.

[0201] The antenna information may include ZoD (Zenith of Direction, Departure). The ZoD is a type of radio wave arrival angle. The ZoD may be estimated by another base station device 40 from radio waves radiated from the antenna of the base station device 40. In this case, the base station device 40 may be a terminal device operating as a base station or an access point, a device performing D2D communication, or a moving relay base station. The ZoD can 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). The ZoD can be used by the communication control device 60 as measurement information.

[0202] The wireless interface information typically refers to information indicating the wireless interface technology provided in the base station device 40. For example, it includes identifier information indicating standard technologies such as technologies used in GSM (registered trademark), CDMA2000, UMTS, E-UTRA, 5G NR, or further next-generation cellular systems, LTE-compliant derivative technologies such as MultiFire and LTE-U (LTE-Unlicensed), MANs (Metropolitan Area Networks) such as WiMAX and WiMAX2+, and IEEE 802.11-based wireless LANs. Version numbers or release numbers of technical specifications defining these technologies may also be assigned. The wireless interface information does not necessarily have to be standard technology, and may include information indicating proprietary wireless technologies.

[0203] The radio interface information may also include information about frequency bands supported by the base station device 40. For example, the information may be expressed by one or more combinations of upper and lower frequency limits, one or more combinations of center frequency and bandwidth, or one or more 3GPP Operating Band numbers.

[0204] The frequency band information supported by the base station device 40 may further include capability information for carrier aggregation (CA) and channel bonding. For example, it may include information on bands that can be combined. Regarding carrier aggregation, it may also include information on bands that are desired to be used as primary component carriers (PCCs) and secondary component carriers (SCCs). It may also include the number of CCs that can be aggregated simultaneously.

[0205] The information about the frequency bands supported by the base station device 40 may also include information indicating radio wave usage priority, such as PAL and GAA.

[0206] The radio interface information may also include modulation scheme information supported by the base station device 40. For example, the radio interface information may include information indicating a primary modulation scheme such as FSK (Frequency Shift Keying), n-ary PSK (Phase Shift Keying) (n is 2, 4, 8, etc.), or n-ary QAM (Quadrature Amplitude Modulation) (n is 4, 16, 64, 256, etc.), and information indicating a secondary modulation scheme such as OFDM (Orthogonal Frequency Division Multiplexing), DFT-s-OFDM (DFT spread OFDM), or FBMC (Filter Bank Multi Carrier).

[0207] The radio interface information may also include information about error correction codes, such as capabilities of Turbo codes, Low Density Parity Check (LDPC) codes, and Polar codes, and information about the coding rate to be applied.

[0208] Alternatively, the modulation scheme information and the information on the error correction code can be expressed as an MCS (Modulation and Coding Scheme) index.

[0209] The radio interface information may also include information indicating functions specific to each radio technology supported by the base station device 40. For example, a typical example is TM (Transmission Mode) information specified in LTE. In addition, if a specific function has two or more modes, it may be included in the radio interface information, as in the above-mentioned TM. Furthermore, if the base station device 40 supports a function that is not required by the specifications even if two or more modes do not exist in the technical specifications, information indicating this may also be included.

[0210] The radio interface information may also include information about radio access technologies (RATs) supported by the base station device 40. For example, the information may include information indicating orthogonal multiple access (OMA) methods such as time division multiple access (TDMA), frequency division multiple access (FDMA), and orthogonal frequency division multiple access (OFDMA), power division multiple access (PDMA, a typical example of which is a method achieved by combining superposition coding (SPC) and successive interference canceller (SIC)), non-orthogonal multiple access (NOMA) methods such as code division multiple access (CDMA), sparse code multiple access (SCMA), interleaver division multiple access (IDMA), and spatial division multiple access (SDMA), and opportunistic access methods such as carrier sense multiple access / collision avoidance (CSMA / CA) and carrier sense multiple access / collision detection (CSMA / CD).

[0211] The radio interface information may also include information on duplex modes supported by the base station device 40. Typical examples include FDD (Frequency Division Duplex), TDD (Time Division Duplex), and FD (Full Duplex). When TDD is included as the radio interface information, TDD Frame Configuration information used / supported by the base station device 40 may be added. Furthermore, information on duplex modes may be included for each frequency band indicated in the frequency band information.

[0212] The radio interface information may also include information on transmit diversity techniques supported by the base station device 40. For example, space time coding (STC) may be included.

[0213] The radio interface information may also include guard band information. For example, the radio interface information may include information about the guard band size defined by the radio standard. Alternatively, the radio interface information may include information about the guard band size desired by the base station device 40.

[0214] The legal information typically refers to information about regulations that the base station device 40 must comply with, as determined by the radio regulatory agency or an equivalent agency of each country or region, and certification information that the base station device 40 has acquired. The regulatory information may typically include, for example, information about upper limits on out-of-band emissions and information about the blocking characteristics of the receiver. The certification information may typically include, for example, type approval information (FCC ID, technical standards compliance certificate, etc.), and legal and regulatory information that serves as the basis for obtaining certification (for example, FCC regulation number, ETSI Harmonized Standard number, etc.).

[0215] For legal information related to numerical values, those specified in the standards for air interface technologies may be used instead. For example, instead of the information on the upper limit of out-of-band emissions, the upper limit of out-of-band emissions may be derived and used using the adjacent channel leakage ratio (ACLR). Alternatively, the ACLR itself may be used as needed. Alternatively, the adjacent channel selectivity (ACS) may be used instead of the blocking characteristics. Alternatively, these may be used together, or the adjacent channel interference ratio (ACIR) may be used.

[0216] The installer information may include information that can identify the person who installed the base station device 40 (the installer), unique information linked to the installer, etc. For example, Non-Patent Document 2 discloses a Certified Professional Installer Registration ID (CPIR-ID) and a CPI name as information that can identify the installer. Also, as unique information linked to the installer, for example, a mailing / contact address, an email address, a telephone number, a PKI (Public Key Identifier), etc. are disclosed. The information is not limited to these, and other information related to the installer may be included as needed.

[0217] [Supplementary information on required parameters] In the registration procedure, depending on the embodiment, it is assumed that device parameters related to not only the base station device 40 but also the terminal device 30 are required to be registered in the communication control device 60. In such a case, the term "communication device" in the above description (Details of Required Parameters) may be replaced with "terminal device" or a term equivalent thereto. Furthermore, parameters specific to the "terminal device" that are not described above (Details of Required Parameters) may also be treated as required parameters in the registration procedure. For example, UE (User Equipment) Category defined by 3GPP may be mentioned.

[0218] [Registration process details] 19 is a sequence diagram illustrating the registration procedure. Base station device 40 or one or more communication systems including multiple base station devices 40 generate a registration request message using the above device parameters (step S11) and notify communication control device 60 (step S12). The generation and / or notification of the message may be performed by intermediate device 50.

[0219] Here, if the device parameters include installer information, this information may be used to process the registration request to prevent tampering. Also, some or all of the information included in the registration request may be encrypted. Specifically, for example, a public key specific to the installer may be shared in advance between the installer and the communication control device 60, and the installer may encrypt the information using a private key. Examples of information that may be encrypted include location information, which is sensitive from a security standpoint.

[0220] Furthermore, as for the location information, as disclosed in Non-Patent Document 2, for example, the installer may write the information directly into the communication control device 60.

[0221] After receiving the registration request, the communication control device 60 performs registration processing for the base station device 40 (step S13) and returns a registration response according to the processing result (step S14). If there is no lack of information required for registration or if there is no abnormality, the communication control device 60 records the information in the storage unit 42 and notifies the device of successful completion. Otherwise, the communication control device 60 notifies the device of a failed registration. If the registration is successful, the communication control device 60 may assign an ID to each communication device and enclose the ID information in the response to notify the device. If the registration fails, typically, the base station device 40 or one or more communication systems including multiple base station devices 40, or their operators (e.g., mobile communication carriers or individuals) or installers, will modify the registration request and retry the registration procedure until it is successful.

[0222] The registration procedure may be performed multiple times. Specifically, for example, if the location information changes beyond a predetermined standard due to movement or accuracy improvement, the registration procedure may be performed again. The predetermined standard is typically determined by a legal system. For example, 47 CFR Part 15 requires that Mode II personal / portable white space devices access the database again if their location information changes by more than 100 meters.

[0223] <5-2. Available Spectrum Query Procedure> The available frequency information inquiry procedure is a procedure in which base station device 40 or intermediate device 50 inquires about information on available frequencies from communication control device 60. Typically, the procedure is initiated when base station device 40 or intermediate device 50 notifies communication control device 60 of an inquiry request including information that can identify base station device 40 (or a base station device 40 subordinate to intermediate device 50).

[0224] As described above, the term "base station device 40" can be replaced with a word indicating another communication device having a wireless communication function. Also, the term "intermediate device 50" can be replaced with a word indicating a communication system that acts on behalf of (represents) another communication device, such as a proxy system.

[0225] (1) Example 1 Here, the available frequency information typically refers to information indicating frequencies that can be safely used for secondary purposes without causing fatal interference to the primary system at the location of the base station device 40 (or a base station device 40 subordinate to the intermediate device 50). For example, if the base station device 40 is installed in a secondary use prohibited area such as an exclusion zone in order to protect the primary system that uses frequency channel F1, the frequency channel F1 will not be notified to the base station device 40 as an available channel.

[0226] (2) Example 2 Furthermore, even if a frequency channel is outside a secondary use prohibited area, if it is determined that the frequency channel will cause fatal interference to the primary system, the frequency channel may not be notified as an available channel.

[0227] (3) Example 3 Furthermore, the available frequency information may include frequency channels that are not notified as available due to conditions other than the primary system protection requirements of example 2. Specifically, for example, in order to avoid possible interference between base station devices 40 in advance, a frequency channel that is being used by another base station device 40 located near the base station device 40 (or a base station device 40 subordinate to the intermediate device 50) may not be notified as an available channel.

[0228] In this case, the communication control device 60 may transmit information on frequencies that do not cause interference between base station devices 40 as recommended frequency information, separate from the available frequencies referred to in Examples 1 and 2. Here, the available frequency information referred to in Examples 1 and 2 may be, for example, information on available channels (Available Channels) as shown in Non-Patent Document 13. Furthermore, the recommended frequency information may be information on recommended channels (Recommended Channels) as shown in Non-Patent Document 13. Note that the recommended frequency information can be considered as a type of available frequency.

[0229] (4) Example 4 Even in these cases (Example 2 and Example 3), it is possible to notify the same frequency as that of the primary system or a nearby base station device 40 as an available channel. In such cases, the available frequency information typically includes maximum allowable transmission power information. The maximum allowable transmission power is typically expressed in equivalent isotropic radiated power (EIRP). This does not necessarily have to be the case, and may be provided as a combination of conducted power and antenna gain, for example. Feeder loss may also be included. Furthermore, the allowable peak gain of the antenna gain may be set for each spatial direction.

[0230] (Details of required parameters) The information that can identify the base station device 40 may be, for example, information specific to the communication device that was registered during the registration procedure, or the ID information described above in (Details of the registration process).

[0231] 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 request may also include, for example, transmission power information. The base station device 40 or intermediate device 50 may include transmission power information when, for example, it only wants to know frequency information for which a desired transmission power is likely to be available. The inquiry requirement information does not necessarily have to be included.

[0232] The inquiry request may also include a measurement report. The measurement report includes the results of measurements performed by the base station device 40 and / or the terminal device 30. For example, the measurement report may include not only raw data but also processed information. 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.

[0233] [Available Frequency Evaluation Process Details] 20 is a sequence diagram illustrating the available frequency information inquiry procedure. Base station device 40 or intermediate device 50 generates an inquiry request including information that can identify base station device 40 (or a base station device 40 subordinate to intermediate device 50) (step S21), and notifies communication control device 60 (step S22).

[0234] After receiving the inquiry request, the communication control device 60 evaluates available frequencies based on the inquiry requirement information (step S23). For example, as explained in the above examples 1 to 3, it is possible to evaluate available frequencies taking into consideration the primary system, its secondary use prohibited area, and the presence of nearby base station devices 40.

[0235] As explained in the above example 4, the communication control device 60 may derive the maximum allowable transmission power information. Typically, it is calculated using information on the allowable interference power in the primary system or its protection zone, information on a reference point for calculating the interference power level suffered by the primary system, registration information of the base station device 40, and a propagation loss estimation model. Specifically, as an example, it is calculated using the following formula: P MaxTx(dBm) =I Th(dBm) +PL(d) (dB)…(1)

[0236] where P MaxTx(dBm) is the maximum allowable transmission power, I Th(dBm) is the allowable interference power, d is the distance between the reference point and the base station device 40, and PL(d) (dB) is the propagation loss at distance d. This formula does not explicitly show the antenna gain at the transmitter and receiver, but it may be included depending on the method of expressing the maximum allowable transmission power (EIRP, conducted power, etc.) and the reference point of the received power (antenna input point, antenna output point, etc.). It may also include a safety margin to compensate for fluctuations due to fading. Feeder loss, etc. may also be taken into account as necessary.

[0237] Furthermore, the above formula is written based on the assumption that a single base station device 40 is the interference source. For example, if it is necessary to consider the aggregated interference from multiple base station devices 40 at the same time, a correction value may be added. Specifically, 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 3.

[0238] Although the above formulas are expressed using logarithms, they may be converted to antilogarithms in practice. Furthermore, all parameters expressed in logarithmic notation in this embodiment may be converted to antilogarithms as appropriate.

[0239] (1) Method 1 Furthermore, as explained above in the section (Details of Required Parameters), when transmission power information is included in the inquiry requirement information, it is possible to evaluate available frequencies by a method other than the above-mentioned method. Specifically, for example, assuming that the desired transmission power indicated by the transmission power information is used, if the estimated amount of interference is lower than the allowable interference power in the primary system or its protection zone, the frequency channel is determined to be available, and this is notified to the base station device 40 (or intermediate device 50).

[0240] (2) Method 2 Although an example has been described in which the band use conditions are calculated based on the other system-related information, the present disclosure is not limited to such an example. For example, when an area / space in which the base station device 40 can use the shared band is predetermined, similar to an area of ​​a REM (Radio Environment Map), the available frequency information may be derived based only on the position-related information and the height-related information. Also, for example, when a lookup table that associates positions and heights with available frequency information is prepared, the available frequency information may be derived based only on the position-related information and the height-related information.

[0241] The evaluation of available frequencies does not necessarily have to be performed after receiving an inquiry request. For example, the communication control device 60 may perform the evaluation independently without an inquiry request after the above-mentioned registration procedure has been successfully completed. In such a case, the communication control device 60 may create an information table such as the REM or lookup table exemplified in Method 2, or a similar information table.

[0242] In either method, evaluation may also be performed on radio wave usage priority such as PAL or GAA. For example, if registered device parameters or query requirements include information on radio wave usage priority, whether frequency usage is possible may be determined based on the priority and notified. Also, for example, as disclosed in Non-Patent Document 2, if a user has previously registered information (called a Cluster List in Non-Patent Document 2) on a base station device 40 that will perform high-priority usage (e.g., PAL) in the communication control device 60, evaluation may be performed based on that information.

[0243] After completing the evaluation of the available frequencies, the communication control device 60 notifies the base station device 40 (or intermediate device 50) of the evaluation result (step S24). The base station device 40 may use the evaluation result received from the communication control device 60 to select desired communication parameters.

[0244] <5-3. Spectrum Grant Procedure> The frequency use permission procedure is a procedure by which the base station device 40 receives secondary use permission for a frequency from the communication control device 60. Typically, after the registration procedure has been completed successfully, the procedure is initiated when the base station device 40 or one or more communication systems including a plurality of base station devices 40 notifies the communication control device 60 of a frequency use permission request including information that can identify the base station device 40. This notification may be made by the intermediate device 50. Note that "after the registration procedure has been completed successfully" also means that it is not necessarily necessary to perform the available frequency information inquiry procedure.

[0245] As described above, the term "base station device 40" can be replaced with a word indicating another communication device having a wireless communication function. Also, the term "intermediate device 50" can be replaced with a word indicating a communication system that acts on behalf of (represents) another communication device, such as a proxy system.

[0246] In the present invention, it is assumed that at least the following two types of frequency use permission request methods can be used. Designation method Flexible Method

[0247] The designation method is a request method in which the base station device 40 designates at least the frequency band and maximum transmission power to be used as desired communication parameters, and requests the communication control device 60 for permission to operate based on the desired communication parameters. The parameters are not necessarily limited to these, and parameters specific to the wireless interface technology (such as modulation method and duplex mode) may also be designated. Information indicating radio wave usage priority, such as PAL and GAA, may also be included.

[0248] The flexible method is a request method in which the base station device 40 specifies only requirements related to communication parameters and requests the communication control device 60 to specify communication parameters that satisfy the requirements and allow secondary use permission. The requirements related to communication parameters may include bandwidth, desired maximum transmission power, or desired minimum transmission power. The requirements are not necessarily limited to these parameters, and parameters specific to the air interface technology (such as modulation method or duplex mode) may also be specified. Specifically, for example, one or more TDD Frame Configurations may be selected in advance and notified.

[0249] Regardless of the method, a measurement report may be included. The measurement report includes the results of measurements performed by the base station device 40 and / or the terminal device 30. For example, not only raw data but also processed information may be included. 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.

[0250] [Frequency usage permission process details] 21 is a sequence diagram illustrating a frequency use permission procedure. A base station device 40 or one or more communication systems including a plurality of base station devices 40 generate a frequency use permission request including information that can identify the base station device 40 (step S31), and notify the communication control device 60 (step S32). The generation and / or notification of the request may be performed by intermediate device 50.

[0251] After acquiring the frequency use permission request, the communication control device 60 performs frequency use permission processing based on the frequency use permission request method (step S33). For example, the communication control device 60 can perform frequency use permission processing taking into consideration the primary system, its secondary use prohibited area, and the presence of nearby base station devices 40, using the methods described in Examples 1 to 3 of <5-2. Available Frequency Information Inquiry Procedure>.

[0252] When the flexible method is used, the communication control device 60 may derive maximum allowable transmission power information by using the method described in Example 4 of <5-2. Available Frequency Information Inquiry Procedure>. Typically, the communication control device 60 calculates the maximum allowable transmission power by using tolerable interference power information in the primary system or its protection zone, calculation reference point information for the interference power level suffered by the primary system, registration information of the base station device 40, and a propagation loss estimation model. For example, the communication control device 60 calculates the maximum allowable transmission power by the following equation (2): P MaxTx(dBm) =I Th(dBm) +PL(d) (dB) …(2)

[0253] where P MaxTx(dBm) is the maximum allowable transmission power, I Th(dBm) is the allowable interference power, d is the distance between the reference point and the base station device 40, and PL(d) (dB)is the propagation loss at distance d. This formula does not explicitly show the antenna gain at the transmitter and receiver, but the formula may be modified depending on the method of expressing the maximum allowable transmission power (EIRP, conducted power, etc.) and the reference point of the received power (antenna input point, antenna output point, etc.). It may also include a safety margin to compensate for fluctuations due to fading. Feeder loss, etc. may also be taken into account as necessary.

[0254] Furthermore, the above formula is written based on the assumption that a single base station device 40 is the interference source. For example, if it is necessary to consider the aggregated interference from multiple base station devices 40 at the same time, a correction value may be added. Specifically, the correction value may be determined based on the three methods (Fixed / Predetermined, Flexible, Flexible Minimized) disclosed in Non-Patent Document 3.

[0255] Various models can be used as the propagation loss estimation model. When a model is specified for each application, it is desirable to use the specified model. For example, in Non-Patent Document 6, propagation loss models such as eHATA (Extended Hata) and ITM (Irregular Terrain Model) are adopted for each application. Naturally, when implementing the present invention, the propagation loss model does not need to be limited to these.

[0256] If a model is not specified for a given application, the model may be used as needed. As a specific example, an aggressive model such as the free space loss model may be used when estimating the interference power to other base station devices 40, and a conservative model may be used when estimating the coverage of the base station device 40.

[0257] Furthermore, when the designation method is used, it is possible to perform frequency use permission processing using the method described in Method 1 of <5-2. Available Frequency Information Inquiry Procedure>. Specifically, for example, assuming that the desired transmission power indicated in the transmission power information is used, if the estimated amount of interference is lower than the tolerable interference power in the primary system or its protection zone, it is determined that use of the frequency channel is permitted, and this is notified to base station device 40 (or intermediate device 50).

[0258] In either method, evaluation may also be performed on radio wave usage priority such as PAL or GAA. For example, if registered device parameters or query requirements include information on radio wave usage priority, whether frequency usage is possible may be determined based on the priority and notified. Also, for example, as disclosed in Non-Patent Document 2, if a user has previously registered information (called a Cluster List in Non-Patent Document 2) on a base station device 40 that will perform high-priority usage (e.g., PAL) in the communication control device 60, evaluation may be performed based on that information.

[0259] The frequency use permission process does not necessarily have to be performed when a request is received. For example, the communication control device 60 may perform the process independently without a frequency use permission request after the above-mentioned registration procedure has been successfully completed. Also, for example, the frequency use permission determination process may be performed at regular intervals. In such a case, an information table similar to the REM or lookup table exemplified in Method 2 of <5-2. Available Frequency Information Inquiry Procedure> may be created.

[0260] After the frequency use permission process is completed, the communication control device 60 notifies the base station device 40 of the determination result (step S34).

[0261] <5-4. Spectrum Use Notification / Heartbeat> The frequency usage notification is a procedure in which base station device 40 or intermediate device 50 notifies communication control device 60 of frequency usage based on communication parameters approved for use in the frequency usage permission procedure. Typically, the procedure is initiated when base station device 40 or intermediate device 50 notifies communication control device 60 of a notification message including information that can identify base station device 40.

[0262] As described above, the term "base station device 40" can be replaced with a word indicating another communication device having a wireless communication function. Also, the term "intermediate device 50" can be replaced with a word indicating a communication system that acts on behalf of (represents) another communication device, such as a proxy system.

[0263] It is desirable that this procedure be performed periodically until the use of the frequency is rejected by the communication control device 60. If this procedure is completed successfully, the base station device 40 may start or continue radio wave transmission. For example, if the grant state was Granted, the success of this procedure will cause the grant state to transition to Authorized. Also, if the grant state was Authorized, the failure of this procedure will cause the grant state to transition to Granted or Idole.

[0264] Here, a grant refers to authorization for radio wave transmission given by a communication control device 60 (e.g., SAS) to a base station device 40 (e.g., CBSD). Grants are described, for example, in Non-Patent Document 2, which standardizes a signaling protocol between a database (SAS) and a base station (CBSD) for frequency sharing in the 3550-3700 MHz band in the United States. In this standard, authorization for radio wave transmission given by an SAS to a CBSD is called a "grant." The operating parameters allowed by the grant are defined by two items: the maximum allowable equivalent isotropic radiated power (EIRP) and the frequency channel. In other words, to transmit radio waves using multiple frequency channels, the CBSD needs to obtain multiple grants from the SAS.

[0265] A grant defines a state that indicates whether radio wave transmission is permitted. The states that indicate the permitted state of radio wave transmission include the Granted state and the Authorized state. Figure 22 is a state transition diagram that shows the permitted states of radio wave transmission. In Figure 22, the Granted state indicates a state in which radio wave transmission is prohibited even though the grant is held, and the Authorized state indicates a state in which radio wave transmission is permitted based on the operating parameter values ​​defined in the grant. The transition between these two states is based on the result of the Heartbeat Procedure defined in the standard.

[0266] In the following description, the frequency usage notification may be referred to as a heartbeat request or simply as a heartbeat. The transmission interval of the heartbeat request may be referred to as a heartbeat interval. Note that the terms heartbeat request or heartbeat that appear in the following description may be replaced with other terms indicating a "request to start or continue radio wave transmission," as appropriate. Similarly, the heartbeat interval may be replaced with other terms (for example, a transmission interval) indicating the transmission interval of the frequency usage notification.

[0267] 23 is a sequence diagram illustrating a frequency usage notification procedure. Base station device 40 or one or more communication systems including multiple base station devices 40 generate a notification message including information that can identify the base station device 40 (step S41), and notify communication control device 60 (step S42). Message generation and / or notification may be performed by intermediate device 50.

[0268] After receiving the frequency usage notification, the communication control device 60 may determine whether the start / continuation of radio wave transmission is permitted (step S43). One method of determination is, for example, checking frequency usage information of the primary system. Specifically, it is possible to determine whether to permit or deny the start / continuation of radio wave transmission based on a change in the frequency used by the primary system, a change in the frequency usage status of a primary system (e.g., shipboard radar) that does not regularly use radio waves, and the like.

[0269] When the determination process is completed, communication control device 60 notifies base station device 40 (or intermediate device 50) of the determination result (step S44).

[0270] In this procedure, the communication control device 60 may issue a command to the base station device 40 (or the intermediate device 50) to reconfigure the communication parameters. Typically, this command may be issued in response to the frequency usage notification. For example, recommended communication parameter information may be provided.

[0271] <5-5. Supplementary information on procedures> Here, the procedures do not necessarily need to be implemented separately, as will be explained below. For example, the above two different procedures may be realized by substituting a third procedure that fulfills the roles of the two different procedures. Specifically, for example, a registration request and an available frequency information inquiry request may be notified together. Also, for example, a frequency use permission procedure and a frequency use notification may be performed together. Naturally, the combination is not limited to these, and three or more procedures may be used. Also, the above procedures may be performed separately.

[0272] Furthermore, when this embodiment is applied for the purpose of frequency sharing with existing systems, it is desirable that appropriate procedures or equivalent procedures be selected and used based on the Radio Law pertaining to the frequency band in the country or region in which the technology of this embodiment is implemented. For example, when registration of communication devices is mandatory for use of a specific frequency band in a specific country or region, it is desirable that the above registration procedures be carried out.

[0273] Furthermore, the expression "acquire information" or equivalent expressions in this embodiment does not necessarily mean that the information is acquired according to the above procedure. For example, although it is described that the location information of the base station device 40 is used in the available frequency evaluation process, it does not necessarily mean that the information acquired in the registration procedure is used, and if location information is included in the available frequency information inquiry procedure request, that location information may also be used. In other words, it means that the described parameters may be included in other procedures within the scope described in this embodiment and within the scope of technical feasibility.

[0274] Furthermore, information that may be included in the response from the communication control device 60 to the base station device 40 (or intermediate device 50) shown in the above procedure may be sent by push notification. As a specific example, available frequency information, recommended communication parameter information, a radio wave transmission continuation refusal notification, etc. may be sent by push notification.

[0275] <5-6. Procedures for terminal equipment> Basically, the procedures described in <5-1> to <5-4> can also be used for the terminal device 30. However, unlike the base station device 40, the terminal device 30 has mobility. That is, its 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 60 may be required. Therefore, in the operation mode defined by the UK Office of Communication (Ofcom) (see Non-Patent Document 4), the following two types of communication parameters are defined. Specific Operational Parameters Generic Operational Parameters

[0276] The non-patent document defines specific operational parameters as "operational parameters specific to a specific slave WSD (White Space Device)." In other words, they are communication parameters calculated using device parameters of the slave WSD corresponding to the terminal device 30. A feature of these parameters is that they are calculated by a WSDB (White Space Database) using the location information of the slave WSD.

[0277] In this non-patent document, generic operational parameters are defined as "operational parameters that can be used by any slave WSD located within the coverage area of ​​a predetermined master WSD (equivalent to base station device 40)." A feature of these parameters is that they are calculated by the WSDB without using the location information of the slave WSD.

[0278] This information for the terminal device 30 can be provided by unicast / broadcast from the base station device 40. For example, a broadcast signal such as a Contact Verification Signal (CVS) defined in FCC Rules Part 15 Subpart H can be used. Alternatively, the information may be provided by a broadcast signal specific to the radio interface. Specifically, the information may be provided by a Physical Broadcast Channel (PBCH) or NR-PBCH used in LTE or 5G NR.

[0279] <5-7. Procedures that occur between communication control devices> [Information Exchange] A communication control device 60 can exchange management information with another communication control device 60. Fig. 24 is a sequence diagram for explaining the procedure for exchanging management information. In the example of Fig. 24, a communication control device 601 and a communication control device 602 exchange information. Of course, the communication control devices exchanging information are not limited to the two communication control devices 601 and 602.

[0280] In the management information exchange procedure, it is desirable that at least the following information be exchanged: Communication device registration information Communication device communication parameter information Area information

[0281] The communication device registration information typically refers to the device parameters of the base station device 40 that are registered in the communication control device 60 in the above-mentioned registration procedure. It is not necessary for all registered information to be exchanged. For example, information that may be considered personal information does not necessarily need to be exchanged. Furthermore, when exchanging communication device registration information, encrypted or obfuscated information may be exchanged. For example, information converted into binary values ​​or information signed using a digital signature mechanism may be exchanged.

[0282] The communication device communication parameter information typically refers to information about communication parameters currently being used by the base station device 40. It is desirable that the information includes at least information indicating the frequency to be used and the transmission power. Other communication parameters may also be included.

[0283] Area information typically refers to information that indicates a predetermined geographical area, and this information may include area information with various attributes in various forms.

[0284] For example, the area information may include protection area information of the base station device 40 that is a high-priority secondary system, such as the PPA (PAL Protection Area) disclosed in Non-Patent Document 5. In this case, the area information may be expressed, for example, by a set of three or more geographical coordinates. Also, for example, if multiple communication control devices 60 can refer to a common external database, the area information may be expressed by an ID indicating the information.

[0285] Furthermore, for example, information indicating the coverage of the base station device 40 may be included. In this case, the area information may also be expressed, for example, as a set of three or more geographical coordinates. Furthermore, for example, it may be expressed as information indicating the radius size of a circle whose origin is the geographical position of the base station device 40. Furthermore, for example, if multiple communication control devices 60 can refer to a common external database, it may be expressed as an ID indicating the information.

[0286] In another aspect, information about area divisions 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.

[0287] In yet another embodiment, the area information does not necessarily need to represent a planar area, but may represent a three-dimensional space. For example, it may be represented using a spatial coordinate system. Furthermore, information indicating a predetermined closed space, such as the number of floors in a building, floor number, or room number, may be used.

[0288] This information can be exchanged in a variety of ways, some of which are listed below: ID specification method Period specification method Area specification method Dump method

[0289] The ID specification method is a method of acquiring information corresponding to an ID that is assigned in advance to identify information managed by the communication control device 60. For example, assume that the communication control device 601 manages a base station device 40 with ID:AAA. In this case, the communication control device 602 issues an information acquisition request to the communication control device 601, specifying ID:AAA. After receiving the request, the communication control device 601 searches for information with ID:AAA, and notifies the registration information and communication parameter information of the corresponding base station device 40 in a response.

[0290] The period designation method designates a specific period, and information that satisfies a predetermined condition can be exchanged during that period.

[0291] The predetermined condition may be, for example, whether or not the information has been updated. For example, if the request specifies acquisition of communication device information for a specific period, the response may include registration information of base station devices 40 that have been newly registered during that period and information on communication parameters of base station devices 40 whose communication parameters have been changed.

[0292] An example of the predetermined condition is whether the communication control device 60 has recorded it. For example, if the request specifies acquisition of communication device information for a specific period, the registration information and communication parameter information of the base station device 40 that the communication control device 60 has recorded for that period may be notified in the response. Furthermore, the latest information for that period may be notified. Alternatively, an update history for each piece of information may be notified.

[0293] In the area specification method, a specific area is specified and information belonging to that area is exchanged. For example, when a request specifies acquisition of communication device information in a specific area, registration information and communication parameter information of base station devices 40 installed in that area may be notified in a response.

[0294] The dump method is a method of providing all information recorded by the communication control device 60. It is desirable that at least the information about the base station device 40 and the area information be provided by the dump method.

[0295] The explanation of information exchange between communication control devices 60 up to this point has all been based on the pull method. That is, the response is information corresponding to parameters specified in a request, and this can be realized, for example, by the HTTP GET method. However, this is not limited to the pull method, and information can also be actively provided to other communication control devices 60 by the push method. The push method can be realized, for example, by the HTTP POST method.

[0296] [Order / Request Procedures] The communication control devices 60 may issue commands and / or requests to each other. Specifically, one example is the reconfiguration of communication parameters of the base station devices 40. For example, if it is determined that the base station device 401 managed by the communication control device 601 is receiving significant interference from the base station device 404 managed by the communication control device 602, the communication control device 601 may request the communication control device 602 to change the communication parameters of the base station device 404.

[0297] Another example is reconfiguration of area information. For example, if an error is found in the calculation of coverage information or protection area information related to the base station device 404 managed by the communication control device 602, the communication control device 601 may request the communication control device 602 to reconfigure the area information. A request to reconfigure area information may also be made for various other reasons.

[0298] <5-8. Typical operation flow> Next, a typical operation flow relating to interference control calculation will be described.

[0299] Fig. 25 is a sequence diagram showing an example of operations related to a grant. Specifically, Fig. 25 is a sequence diagram showing operations of the communication system 2 corresponding to the procedures of <5-3. Frequency Use Permission Procedure> and <5-4. Frequency Use Notification>. Note that the operation flow shown in Fig. 25 is merely an example, and may vary depending on the conditions of the base station device 40, the communication control device 60, and the intermediate device 50, etc.

[0300] First, the communication control device 601 executes periodic processing when it is time to execute the periodic processing (step S71). The periodic processing is processing for executing calculations related to information synchronization between the communication control devices 60 and primary system protection. The periodic processing is, for example, CPAS (Coordinated Periodic Activities among SASs) shown in Non-Patent Documents 10 and 11. In the following description, the periodic processing may also be referred to as periodic protection calculation. The execution timing of the periodic processing is, for example, 24 hours after the previous execution of the periodic processing. Of course, the execution interval of the periodic processing is not limited to 24 hours.

[0301] Fig. 26 is a diagram showing specific processing contents of periodic processing. In the example of Fig. 26, communication control devices 601 and 602 perform information synchronization and primary system protection calculation. Of course, the number of communication control devices 60 performing periodic processing (information synchronization, etc.) may be more than two.

[0302] 26, each of the communication control devices 60 executes periodic processing (step S71). First, each of the communication control devices 60 synchronizes information with the other communication control devices 60 (step S71a). Then, each of the communication control devices 60 performs primary system protection calculations (steps S71b and S71c). At this time, the communication control devices 60 may calculate an estimate of the amount of interference that each communication node (for example, base station device 40) may individually cause to the primary system, a residual interference margin, and the like.

[0303] 25, the base station device 40 or the intermediate device 50 transmits a grant request to the communication control device 601 (step S72). In this embodiment, the base station device 40 or the intermediate device 50 attaches, to the grant request, information regarding the usage mode of the frequency resources (radio wave resources) allocated as a result of the grant request. For example, the base station device 40 or the intermediate device 50 adds, to the grant request, information indicating the use and details of the grant.

[0304] The acquisition unit 641 of the communication control device 601 acquires the grant request with the usage mode information added. The communication control device 601 performs processing related to frequency resources (i.e., processing related to the grant) based on the usage mode information (step S73). For example, the communication control device 601 performs a usage permission determination process for allocating an available frequency to the base station device 40 based on the usage mode information.

[0305] Once the frequency has been allocated, the communication control device 601 transmits a grant response to the base station device 40 or the intermediate device 50. In the example of FIG. 25, the communication control device 601 notifies the success of the grant request (Approve shown in FIG. 25) as the grant response (step S74). The acquisition unit 441 of the base station device 40 or the acquisition unit 541 of the intermediate device 50 acquires the grant response from the communication control device 601. As a result of the success of the grant request, the grant state of the base station device 40 transitions from Idole to Granted, as shown in FIG. 22. The base station device 40 configures each unit based on the allocated grant.

[0306] Next, the base station device 40 or the intermediate device 50 transmits a heartbeat request to the communication control device 601 (step S75). Then, the acquisition unit 641 of the communication control device 601 acquires the transmitted heartbeat request. Then, the communication control device 601 transmits a heartbeat response.

[0307] 25, the grant allocated to the base station device 40 has not yet passed through periodic processing (for example, CPAS). Therefore, in the example of Fig. 25, the communication control device 601 cannot approve the start of radio wave transmission. Therefore, the communication control device 601 transmits a radio wave transmission suspension instruction as a heartbeat response (step S75).

[0308] Thereafter, the base station device 40 or the intermediate device 50 continues to transmit a heartbeat request at the heartbeat interval notified by the communication control device 601. In response to this heartbeat request, the communication control device 601 continues to transmit an instruction to stop radio wave transmission as a heartbeat response until the next periodic processing is completed (step S76).

[0309] When the timing for executing periodic processing arrives, each of the plurality of communication control devices 60 including the communication control device 601 executes periodic processing (step S77). For example, as shown in FIG. 26, each of the plurality of communication control devices 60 synchronizes information with the other communication control devices 60 (step S77a). Then, each of the plurality of communication control devices 60 performs primary system protection calculation (steps S77b and S77c). This protection calculation is an example of interference calculation of this embodiment.

[0310] Next, the base station device 40 or the intermediate device 50 transmits a heartbeat request to the communication control device 601 (step S78). Then, the acquisition unit 641 of the communication control device 601 acquires the transmitted heartbeat request. Then, the communication control device 601 transmits a heartbeat response. At this time, the grant allocated to the base station device 40 has passed the periodic processing, so the communication control device 601 can authorize the base station device 40 that transmitted the heartbeat request to start radio wave transmission. Therefore, the communication control device 601 transmits a heartbeat response indicating success (Authorize shown in FIG. 25) as the heartbeat response (step S78). As a result of the success of the heartbeat request, the grant state of the base station device 40 transitions from Granted to Authorized, as shown in FIG. 22. The base station device 40 performs wireless communication by controlling the wireless communication unit 41 based on the allocated grant.

[0311] As described above, the grant state (state indicating permission for radio wave transmission) transitions depending on the result of the heartbeat procedure. Various purposes are defined for the heartbeat procedure, one of which is to issue a radio wave suspension command for the base station device 40 when an existing system (e.g., shipborne radar) in the same band is using radio waves. For example, when the communication control device 60 determines that an existing system such as the communication system 1 is using radio waves, the communication control device 60 is obligated to suspend radio waves of all base station devices 40 that may cause interference within a predetermined time (e.g., within 300 seconds). Since it is expected that a push notification of the suspension command would be complicated in implementation, the communication control device 60 may issue a radio wave suspension command using a heartbeat response. In the following description, the process executed by the communication control device 60 to cause the base station device 40 to suspend use of frequency resources is referred to as a "frequency resource usage suspension process" or a "grant suspension process."

[0312] For example, the base station device 40 or the intermediate device 50 transmits a heartbeat request to the communication control device 601 (step S80). Then, the communication control device 601 acquires the transmitted heartbeat request. Then, the communication control device 601 determines whether or not a primary system such as the communication system 1 is using radio waves. If it is determined that the primary system is using radio waves related to a predetermined frequency resource, the communication control device 601 transmits a suspension instruction for radio wave transmission as a heartbeat response (step S81). The base station device 40 suspends the transmission of radio waves related to the predetermined frequency resource. As a result, the grant state of the base station device 40 transitions from Authorized to Idle (or Granted) as shown in FIG. 22. Alternatively, the grant state of the base station device 40 transitions from Granted to Idole as shown in FIG. 22.

[0313] <<6. Operations related to medium reservation by communication control device>> Next, the operation of the medium reservation method of this embodiment will be described using the operation of the communication control device 60 as an example. Here, the medium reservation method refers to a reservation method for using radio resources such as frequencies. Furthermore, if the frequency resource used is a shared band, the available frequencies described in 5-2 and 5-3 are used. Furthermore, even in an unlicensed band, a recommended frequency derived by the communication control device based on the above-mentioned interference control technique may be used.

[0314] (Overview of operation related to the medium reservation method) The communication control device 60 of this embodiment acquires information specific to one or more communication devices (e.g., base station device 40) (hereinafter referred to as specific information). The specific information is, for example, ID information, installation location information, and wireless interface technology information of the communication device. The specific information may also include capability information of the communication device other than the above. For example, the specific information may include information on the wireless access method used by the communication device and information on whether the communication device can synchronize with other communication devices.

[0315] Then, the communication control device 60 determines a medium reservation method based on the acquired unique information and notifies the communication device (e.g., the base station device 40) of information on the determined medium reservation method. The communication device executes medium reservation based on the notified medium reservation method.

[0316] In this embodiment, a medium reservation method is assumed in which the receiving side (e.g., base station device 40) first transmits a dedicated signal to the transmitting side (e.g., terminal device 30) to reserve the medium, and the transmitting side transmits when it hears the signal. Note that the receiving side may be the terminal device 30, and the transmitting side may be the base station device 40. Here, the dedicated signal may be, for example, a common waveform that is independent of the radio interface, a common preamble, a common control signal, or the like.

[0317] The operation of the communication control device 60 relating to the medium reservation method has been outlined above, but the operation of the communication control device 60 relating to the medium reservation method will now be described in detail.

[0318] In the following description, it is assumed that the communication device to which the information regarding the medium reservation method is notified from the communication control device 60 is the base station device 40, as an example. However, the communication device to which the information regarding the medium reservation method is notified is not limited to the base station device 40, and may be, for example, the intermediate device 50 or the terminal device 30. The descriptions "base station device 40" or "communication device" that appear in the following description can be replaced with descriptions indicating a communication device other than the base station device 40 (for example, the intermediate device 50 or the terminal device 30) as appropriate.

[0319] <6-1. Applicable unit of media reservation method> First, the application unit of the medium reservation method will be described.

[0320] A mutual interference group is assumed as an application unit of the medium reservation method. The communication control device 60 identifies a mutual interference group from among multiple communication devices (e.g., multiple base station devices 40) and determines a medium reservation method for each identified group. Here, a mutual interference group is a group of communication devices that may cause interference to each other.

[0321] Examples of mutual interference groups are given below. Note that the mutual interference groups are not limited to Examples 1 and 2 shown below.

[0322] (Example 1 of a mutual interference group) An example of a mutual interference group is a pair of communication devices whose coverage areas overlap partially or completely. Fig. 27 is a diagram showing an example of a mutual interference group. In Fig. 27, three circles centered on three base station devices respectively indicate the coverage areas of the three base station devices. In the example of Fig. 27, these three base station devices correspond to a mutual interference group.

[0323] Examples of criteria for determining whether something is a "duplicate" include the following (A1) to (A3): Of course, the criteria for determining whether something is a "duplicate" are not limited to the examples shown in (A1) to (A3) below.

[0324] (A1) The ratio of overlapping and non-overlapping areas in the total coverage (A2) Whether there is even a slight overlap (i.e., overlap area > 0 m 2 ) (A3) Whether the probability (location rate, time rate, etc.) of the interference power value exceeding a predetermined interference threshold in the overlapping portion exceeds a predetermined threshold probability.

[0325] The communication control device 60 identifies a mutual interference group based on the above criteria and information acquired from each of the plurality of communication devices (for example, information specific to the communication device). There may be multiple mutual interference groups identified by the communication control device 60.

[0326] (Example 2 of mutual interference group) Another example of a mutual interference group is a pair of communication devices where the radio wave coverage area of ​​the terminal device overlaps with part or all of the coverage area of ​​the non-serving communication device. Figure 28 shows another example of a mutual interference group. Figure 28 shows an example where the radio wave coverage area of ​​the terminal device overlaps with part of the coverage area of ​​the non-serving communication device.

[0327] The communication control device 60 identifies a mutual interference group based on this criterion and information acquired from each of the plurality of communication devices (for example, information specific to the communication device). There may be multiple mutual interference groups identified by the communication control device 60.

[0328] (exception) Note that even if a pair of communication devices satisfies the above example 1 and / or example 2, if the pair satisfies a predetermined criterion, the communication control device can regard the communication devices as communication devices that do not interfere with each other. For example, if multiple communication devices that are in an interfering relationship that satisfies the above example 1 and example 2 cooperate using a predetermined communication technology, the communication control device can regard the multiple communication devices as communication devices that do not interfere with each other.

[0329] The following (B1) to (B2) can be considered as criteria for determining that "they do not interfere with each other." Of course, the criteria for determining that "they do not interfere with each other" are not limited to the examples shown in (B1) to (B2) above.

[0330] (B1) When forming a common network (e.g., having the same SSID, having the same cell ID, etc.) (B2) When cooperation between communication devices is performed (e.g., CoMP (Coordinated Multi Point), Dual Connectivity, etc.)

[0331] <6-2. Criteria for determining media reservation method> Next, the criteria for determining the medium reservation method will be described.

[0332] The communication control device 60 determines a medium reservation method for multiple communication devices to share a predetermined channel based on information (e.g., unique information) acquired from each of the multiple communication devices. For example, the communication control device 60 determines a medium reservation method to be applied to each of the multiple communication devices that make up the identified mutual interference group. If there are multiple identified mutual interference groups, the communication control device 60 determines a medium reservation method for each identified group.

[0333] In the following description, the communication control device 60 determines the medium reservation method for each mutual interference group, but the unit for determining the medium reservation method does not necessarily have to be a mutual interference group unit.

[0334] Various criteria can be assumed as criteria for determining the medium reservation method, examples of which are given below.

[0335] <6-2-1. Decision Criteria 1 (Asynchronous Channel Access)> If the identified group contains a communication device that cannot synchronize with other communication devices, the communication control device 60 determines to adopt an asynchronous channel access method as the medium reservation method for the group. An example of the asynchronous channel access method is the LBT (Listen Before Talk) method.

[0336] Here, the following (C1) to (C2) are examples of a "communication device that cannot synchronize with other communication devices." Of course, the "communication device that cannot synchronize with other communication devices" is not limited to the examples shown below.

[0337] (C1) The specifications of the wireless interface technology do not provide the function to recognize synchronization signals transmitted by other communication devices. (C2) There is no mechanism for synchronization based on external instructions.

[0338] If there is at least one communication device that satisfies the above (C1) or (C2) in the identified group, the communication control device 60 determines that the asynchronous channel access method is to be used as the medium reservation method in that group.

[0339] <6-2-2. Decision Criterion 2 (Synchronous Channel Access)> If all communication devices in a group are synchronous communication devices, the communication control device 60 determines to adopt the synchronous channel access method as the medium reservation method for that group. For example, if there is no communication device (e.g., base station device 40) that satisfies the above (C1) and (C2) in the identified group, the communication control device 60 determines to use the synchronous channel access method as the medium reservation method for that group.

[0340] Here, the synchronous channel access method may be, for example, a method in which a plurality of communication devices share a channel using a synchronization frame. The synchronization frame may include a determination period used by the communication device to reserve the medium and a channel occupation time allocated to the communication device that has reserved the medium. The synchronization frame will be described in detail later.

[0341] <6-3. When using synchronous channel access method> The following description will be given assuming that the communication control device 60 employs a synchronous channel access method as the medium reservation method for a predetermined group. In the following description, it is assumed that multiple communication devices use synchronous frames to reserve the medium and use radio waves.

[0342] <6-3-1. Example of synchronous frame configuration> First, an example of the configuration of a synchronization frame used in a synchronous channel access method will be described. Fig. 29 is a diagram showing an example of the configuration of a synchronization frame. In the example of Fig. 29, a frame that serves as a baseline (Baseline Frame in the figure) and subsequent frames (Subsequent Frame(s) in the figure) are shown as synchronization frames. The baseline frame and subsequent frame each constitute one synchronization frame.

[0343] In the example of FIG. 29, one synchronization frame is made up of a CCA (Clear Channel Assessment) period, a channel occupancy time, and a muting period.

[0344] Here, the channel occupancy time is the time allocated to a communication device that has reserved the medium, and the muting period is the period during which radio wave transmission is suspended until the next subsequent frame.

[0345] The CCA period is a period used by a communication device to reserve a medium. That is, the CCA period is a period for determining whether a specific communication device in a group may occupy a channel for a specific time (e.g., a channel occupancy time within a frame). In the following description, the CCA period may be referred to as a determination period.

[0346] FIG. 30 is a diagram showing an example of the configuration of a CCA period. One CCA period is made up of a plurality of medium reservation slots. In the example of FIG. 30, one CCA period is time-divided into K medium reservation slots. K is an arbitrary integer. In the figure, the number written on each medium reservation slot is the slot number. In the following description, the medium reservation slot may be referred to as a synchronized medium reservation slot. In the following description, the medium reservation slot may also be simply referred to as a slot.

[0347] A medium reservation slot is assigned to each of a plurality of communication devices within a group. A specific communication device within the group reserves the medium (reserves the channel occupancy) by transmitting a dedicated signal in the slot assigned to it. For example, assume that a medium reservation slot with slot number 3 is assigned to a specific communication device within the group. In this case, if the specific communication device does not detect the transmission of a dedicated signal from another communication device in the medium reservation slots with slot numbers 0 to 2, it will be able to occupy the channel (reserve the medium) during the channel occupancy period within the same frame.

[0348] In the example of Fig. 30, the CCA period is time-divided into K medium reservation slots, but the division of the CCA period is not limited to time-division. The CCA period may be frequency-divided, code-divided, or space-divided into K medium reservation slots.

[0349] In the following description, it is assumed that multiple communication devices in a group reserve the medium and use radio waves using synchronization frames with the configurations shown in Figures 29 and 30. Of course, multiple communication devices in a group may reserve the medium and use radio waves using synchronization frames with configurations other than those shown in Figures 29 and 30.

[0350] <6-3-2. Notification parameters> When the synchronous channel access method is adopted, the communication control device 60 determines parameters required for the synchronous channel access, and then notifies the determined parameters to each of the communication devices in the group (for example, all the base station devices 40 in the group) as information related to the medium reservation method.

[0351] Examples of parameters to be notified include the following (D1) to (D2): Of course, the parameters are not limited to the examples shown in (D1) to (D2) below.

[0352] (D1) Information about the reference time (D2) Information about media reservation slots

[0353] Below, (D1) and (D2) will be explained separately.

[0354] (D1) Information about the reference time First, information about the reference time will be described. As the information about the reference time, information that can identify the start time and end time of the CCA period is assumed. In the case of the baseline frame shown in FIG. 29, the start time of the CCA period is t CCAstart,n and the end time is t CCAend,n In addition, in the case of the first subsequent frame following the baseline frame shown in FIG. 29, the start time of the CCA period is t CCAstart,n+1 and the end time is t CCAend,n+1 is.

[0355] Examples 1 and 2 below can be assumed as information that can identify the start time and end time of the CCA period.

[0356] (Example 1) Absolute reference time information and periodic information are assumed as information that can identify the start time and end time of a CCA period. Here, the absolute reference time information is time information such as 1900-01-01T00:00:00Z, and the periodic information is time information expressed in msec, sec, minutes, hours, etc. In Example 1, it is basically assumed that the CCA period occurs at the same cycle over and over again.

[0357] (Example 2) As information that can identify the start time and end time of the CCA period, the start time of the baseline frame, various time information within the baseline frame, and information on the number of subsequent frames (Subsequent Frame(s)) that follow can be assumed. Here, in the example of FIG. 29, the various time information within the baseline frame includes, for example, the start time t CCAstart,n , the end time of the CCA period t CCAend,n , the start time of the channel occupancy time t COTstart,n , and the end time of the channel occupancy time t COTend,n It is expected that:

[0358] In Example 2, the configuration of the baseline frame can be changed periodically. For example, the communication control device 60 can lengthen or shorten the CCA period periodically. Also, the communication control device 60 can lengthen or shorten the channel occupation time periodically.

[0359] (D2) Information about media reservation slots Next, information about medium reservation slots will be described. Information about medium reservation slots is, for example, information about allocation of medium reservation slots to each communication device in a group. The allocation information may be, for example, a slot number. For example, in the example of FIG. 30, the communication control device 60 allocates one of K medium reservation slots to a predetermined communication device (e.g., base station device 40) in the group.

[0360] In the following description, it is assumed that the communication control device 60 notifies the communication device of allocation information of medium reservation slots as information on medium reservation slots.

[0361] <6-3-3. Media reservation slot allocation> Next, a method for determining the allocation of medium reservation slots will be described. The communication control device 60 determines the medium reservation slots to be allocated to each of the multiple communication devices in the group. For example, the communication control device 60 determines the allocation of medium reservation slots to each of the multiple communication devices in the group based on the interference relationship between the communication devices in the group. Then, the communication control device 60 notifies each of the multiple communication devices in the group of information on the determined allocation as information on the medium reservation method.

[0362] The procedure for determining allocation of medium reservation slots is assumed to be as follows: Of course, the procedure for determining is not limited to the example shown below. The procedure for determining is composed of Step 1 and Step 2 shown below.

[0363] (Step 1) In step 1, the communication control device 60 determines the number K of medium reservation slots. For example, the communication control device 60 determines the number K of medium reservation slots in the following procedure.

[0364] First, the communication control device 60 identifies the number of communication devices in the group (M), and for each of the communication devices in the group, the number of communication devices with which it is interfering (N m,Interference Then, the communication control device 60 determines the number K of medium reservation slots based on the following formula.

[0365]

number

[0366] Here, α is an integer equal to or greater than 0. This α corresponds to a margin for "accommodating" a new communication device. Also, +1 means that the mth communication device is counted.

[0367] A specific example of calculating the number K of medium reservation slots is shown below. Figures 31 and 32 are diagrams for explaining a specific example of calculating the number K of medium reservation slots. In the examples of Figures 31 and 32, α is set to 0 for ease of understanding.

[0368] For example, in the example of FIG. 31, there are eight communication devices with communication device IDs A to H. Therefore, the communication control device 60 determines that the number of communication devices in the group (M) is 8. Furthermore, the communication control device 60 determines the number of communication devices with which there is an interference relationship (N m,Interference ) is identified. In the example of FIG. 31, the communication devices connected by lines are in an interfering relationship. The second column of the table shown in FIG. 32 indicates the number of interfering communication devices for each of the eight communication devices shown in FIG. 31. By applying these to the above formula, the communication control device 60 can calculate that the number K of medium reservation slots is 5.

[0369] (Step 2) In step 2, the communication control device 60 schedules medium synchronization reservation slots for each communication device based on the determined K. The communication control device 60 determines slot allocation to each of the multiple communication devices in the group based on the determined K. At this time, the communication control device 60 allocates different slots to multiple communication devices in the group that are in an interfering relationship. Note that the communication control device 60 may allocate the same slot to multiple communication devices in the group that do not interfere with each other.

[0370] FIG. 33 is a diagram showing an example of assigned slots in the examples of FIGS. 31 and 32. As can be seen from FIG. 33, the communication control device 60 assigns different slots to multiple communication devices that are in an interference relationship within a group. For example, communication device D is in an interference relationship with communication devices B, E, F, and G, but is assigned a slot different from the slots assigned to communication devices B, E, F, and G. On the other hand, the communication control device 60 may assign the same slot to multiple communication devices that do not interfere with each other within a group. For example, communication device F is not in an interference relationship with communication device B. Therefore, the communication control device 60 assigns the same slot to communication device F as communication device B. By focusing on communication device F, the reason for setting K as described above can be understood.

[0371] <6-3-4. Changing slot allocation> As described above, a specific communication device in a group reserves the medium by transmitting a dedicated signal in the slot assigned to it. For example, if a specific communication device in a group is assigned a medium reservation slot with slot number 3, the specific communication device can occupy the channel if it does not detect any dedicated signal transmission from other communication devices in the medium reservation slots with slot numbers 0 to 2.

[0372] In this case, depending on the slot allocation method, there is a possibility that unfairness in the use of radio waves may occur. For example, assume that slots are allocated as shown in the example of FIG. 33. In this case, communication device C and communication device G are allocated the first slot, and therefore can communicate at any time. On the other hand, if communication device C or communication device G occupies a channel, other communication devices cannot use that channel. For example, if communication device C or communication device G constantly occupies a channel, other communication devices cannot use that channel at all times. In this way, depending on the slot allocation method, problems may arise in the fairness of channel access opportunities.

[0373] Therefore, from the viewpoint of ensuring fairness in channel access opportunities, the communication control device 60 may take the following measures (E1) to (E3).

[0374] (E1) The communication control device 60 performs scheduling periodically or aperiodically (periodic / aperiodic). At least, the communication control device 60 cancels the allocation of the first slot after a certain period of time and allocates it to another slot. The communication control device 60 may also set a period for determining medium synchronization reserved slot information and change the allocation of the medium reserved slot in that period. The communication control device 60 may also change the allocation of the medium reserved slot when there is a change in available frequency information that can protect a high-priority system in that frequency band.

[0375] (E2) The communication control device 60 performs round robin scheduling. For example, the communication control device 60 allocates the first slot to the plurality of communication devices in the group in order.

[0376] (E3) The communication control device 60 performs scheduling based on the communication status of the communication devices in the group. For example, the communication control device 60 performs scheduling based on a proportional fairness standard. For example, the communication control device 60 may perform scheduling based on the ratio between the average and maximum throughput over a certain period of time. Furthermore, the communication control device 60 may perform scheduling based on the ratio between the average and maximum of other metrics (for example, capacity, amount of mutual interference, etc.) in addition to the throughput.

[0377] When the slot allocation is changed, the communication control device 60 notifies the changed allocation information as information related to the medium reservation method.

[0378] <6-3-5. Reserve Slot> It should be noted that a new communication device may be added under the management of the communication control device 60. For example, a new communication device may be added under the management of the communication control device 60 through the above-mentioned <5. Explanation of Procedures> (for example, through a registration procedure, a frequency use permission procedure, a frequency use notification, etc.). In this case, it is desirable that the communication control device 60 also allocates a medium reservation slot to this new communication device.

[0379] At this time, the communication control device 60 may acquire unique information of the new communication device and identify the mutual interference group to which the new communication device belongs based on the acquired unique information. Then, the communication control device 60 may allocate a medium reservation slot of a synchronization frame to be used in the identified mutual interference group.

[0380] 31 and 32, depending on the interference relationship between the new communication device and other existing communication devices, the communication control device 60 may not be able to allocate a medium reservation slot to the new communication device until the next time it changes the configuration of the synchronization frame or medium reservation slot. This also applies when it is not possible to identify the interference relationship between the new communication device and other existing communication devices.

[0381] Therefore, the communication control device 60 sets α in the formula shown in <6-3-3. Allocation of medium reservation slots> to a value greater than 0 so that new communication devices can be given a channel access opportunity as soon as possible. In other words, the communication control device 60 reserves a predetermined number (for example, about α) of medium reservation slots that are not used by existing communication devices for new communication devices. Then, when the communication control device 60 detects a new communication device, it allocates the reserved medium reservation slots. This makes it possible to give new communication devices a channel access opportunity as soon as possible. In the following description, the medium reservation slots reserved for new communication devices may be referred to as reserved slots.

[0382] When providing a reserved slot (for example, when α>0), the communication control device 60 may provide the reserved slot at the beginning of slots allocated to existing communication devices. Fig. 34 is a diagram showing a state in which a reserved slot is provided at the beginning of slots allocated to existing communication devices. This allows new communication devices to be given preferential channel access opportunities.

[0383] In the example of Fig. 34, a reserved slot is provided in an existing synchronization frame, but a synchronization frame may also be prepared for a new communication device. For example, the communication control device 60 may periodically prepare a synchronization frame for a new communication device in which no medium reservation slot is assigned to any of the existing communication devices. In the following description, a frame reserved for a new communication device may be referred to as a reserved frame. A medium reservation slot included in a reserved frame can also be considered as a reserved slot.

[0384] It is also possible that the number of new communication devices exceeds the number of reserved slots. Therefore, the communication control device 60 may cause the new communication devices to use the reserved slots randomly. For example, the communication control device 60 may assume a reserved slot frame consisting of a plurality of consecutive reserved slots (for example, a reserved slot group consisting of α consecutive reserved slots as shown in FIG. 34). In this case, the communication control device 60 may cause the new communication devices to use the reserved slots randomly, regarding the reserved slot frame as the maximum contention window (CWmax).

[0385] In many cases, it is assumed that the interference relationship between new communication devices is unknown. By randomly using the reserved slots, the communication control device 60 can reduce the possibility of mutual interference between new communication devices that cannot be predicted at this time. Furthermore, the communication control device 60 can maintain fairness in channel access opportunities between new communication devices.

[0386] <6-4.Decision making> There may be multiple communication control devices 60 that are the decision-makers in a shared band that does not require a license or an unlicensed band. In this case, various variations in the decision-making of the communication control devices 60 may be assumed. The decision-making of the communication control devices 60 will be described in detail below.

[0387] Before explaining the decision-making of the communication control device 60, terms relating to decision-making will be defined as follows.

[0388] Autonomous Decision-Making: Autonomous decision-making is a decision-making topology in which a decision-making entity makes decisions independently of other decision-making entities.

[0389] Centralized Decision-Making: Centralized decision-making is a decision-making topology in which a decision-making entity delegates a decision to another decision-making entity.

[0390] Distributed Decision-Making: Distributed decision-making is a decision-making topology in which a decision-making entity cooperates with other decision-making entities to make decisions.

[0391] The decision-making of the communication control device 60 when there are multiple communication devices of the communication control device 60 will be described in detail below.

[0392] <6-4-1. Independent decision making> First, autonomous decision-making of the communication control device 60 when multiple communication control devices 60 exist will be described.

[0393] When the communication control device 60 performs autonomous decision-making, each of the communication control devices 60 performing autonomous decision-making executes the following process. Note that the process shown below is merely an example, and autonomous decision-making is not limited to the process shown below.

[0394] First, the communication control device 60 sets a common reserve frame (hereinafter referred to as a common reserve frame) among a plurality of communication control devices 60. Alternatively, the communication control device 60 sets a common reserve slot (hereinafter referred to as a common reserve slot) among a plurality of communication control devices 60. As described above, the common reserve frame can be rephrased as a common frame. Furthermore, the common reserve slot can be rephrased as a common slot.

[0395] Then, the communication control device 60 acquires information about the communication devices managed by the other communication control device 60. After that, the communication control device 60 identifies the interference relationship with the communication devices managed by the other communication control device.

[0396] The communication control device 60 then instructs a communication device that is determined to have an interference relationship with a communication device managed by another communication control device to randomly use a common reserved frame or a common reserved slot. The method for randomly using a common reserved frame or a common reserved slot may be the same as the method described in <6-3-5. Reserved slots>.

[0397] Through the above processing, the communication control device 60 can avoid interference with the communication devices it manages, regardless of the judgment of other communication control devices.

[0398] <6-4-2. Centralized decision making> Next, centralized decision-making of the communication control device 60 when multiple communication control devices 60 exist will be described.

[0399] When the communication control device 60 performs autonomous decision-making, the multiple communication control devices 60 can be divided into a master communication control device and slave communication control devices subordinate to it. The following describes the processing of each of the master communication control device and the slave communication control device. Note that the processing shown below is merely an example, and centralized decision-making is not limited to the processing shown below.

[0400] (Master communication control device) The master communication control device acquires information about the communication devices under its control from the slave communication control device. The master communication control device then determines a medium reservation method based on the above-described method. The master communication control device then notifies the communication devices of the information about the determined medium reservation method via, for example, the slave communication control device.

[0401] (Slave communication control device) The slave communication control device notifies the master communication control device of information relating to the communication devices under its control.The slave communication control device then acquires information relating to the medium reservation method determined by the master communication control device from the master communication control device.The slave communication control device then notifies the communication devices under its control of the information relating to the medium reservation method.

[0402] The above process allows for centralized management of multiple communication devices, resulting in extremely high frequency efficiency.

[0403] <6-4-3. Decentralized decision making> Next, a description will be given of distributed decision-making of the communication control device 60 when a plurality of communication control devices 60 exist.

[0404] When the communication control device 60 performs distributed decision-making, each of the multiple communication control devices 60 performing distributed decision-making executes the following process. Note that the process shown below is merely an example, and distributed decision-making is not limited to the process shown below.

[0405] First, the communication control device 60 sets a common reserve frame (hereinafter referred to as a common reserve frame) among a plurality of communication control devices 60. Alternatively, the communication control device 60 sets a common reserve slot (hereinafter referred to as a common reserve slot) among a plurality of communication control devices 60. The common reserve frame can be called a common frame. The common reserve slot can be called a common slot.

[0406] Then, the communication control device 60 acquires information about the communication devices managed by the other communication control device 60. After that, the communication control device 60 identifies the interference relationship with the communication devices managed by the other communication control device.

[0407] Then, the communication control device 60 negotiates with the other communication control device 60 to determine which communication device should change information regarding the medium reservation method for a pair of a communication device managed by the other communication control device 60 and a communication device under its own management that is determined to have an interference relationship with the communication device.

[0408] If the negotiation results in a determination that the communication devices under its control should change the information regarding the medium reservation method, the communication control device 60 instructs the communication devices under its control to randomly use common reserved frames or common reserved slots. The method for randomly using common reserved frames or common reserved slots may be the same as the method described in <6-3-5. Reserved Slots>.

[0409] (Negotiation methods) The following (F1) to (F3) can be assumed as methods of the above-mentioned "negotiation" (negotiation executed by a communication control device 60 with another communication control device 60). Of course, the negotiation method is not limited to the following examples.

[0410] (F1) The communication control device 60 makes a unique decision based on a predetermined criterion. For example, one or more of the multiple communication control devices 60 that are negotiating use metrics such as frequency utilization efficiency and channel access opportunities to calculate whether a communication device should change information about the medium reservation method to improve or enhance the metric value. Then, based on the calculation result, the communication control device 60 determines which communication device should change information about the medium reservation method.

[0411] (F2) When each communication device has its own performance requirement value, the multiple communication control devices 60 that negotiate exchange that information. Then, the communication control devices 60 change the information related to the medium reservation method so as to come as close as possible to the requirement value.

[0412] (F3) The plurality of communication control devices 60 that are negotiating repeat the command and request procedure described in <5-7. Procedures occurring between communication control devices> until they reach an agreement with each other.

[0413] <<7. Operations Related to Medium Reservation in Base Station Equipment>> Next, the operation of the base station device 40 relating to medium reservation will be described.

[0414] As described above, in this embodiment, it is assumed that the communication device to which the information regarding the medium reservation method is notified from the communication control device 60 is the base station device 40, but the communication device to which the information regarding the medium reservation method is notified does not necessarily have to be the base station device 40. The descriptions of "base station device 40" or "communication device" that appear in the following description can be replaced with descriptions indicating a communication device other than the base station device 40 (for example, the intermediate device 50 or the terminal device 30) as appropriate.

[0415] The base station device 40 can be classified into a base station device that does not have the functions of the communication control device 60 and a base station device that does not have the functions of the communication control device 60. The operation of each will be described below.

[0416] <7-1. If you do not have the function of a communication control device> First, the operation when the base station device 40 does not have the function of the communication control device 60 will be described.

[0417] The base station device 40 acquires information indicating the first medium reservation method determined by the communication control device 60. Then, the base station device 40 executes medium reservation based on the acquired information indicating the first medium reservation method.

[0418] At this time, the base station device 40 may generate information indicating a second medium reservation method based on information indicating the first medium reservation method, and notify surrounding communication devices (e.g., terminal devices 30 under its management) of the information indicating the second medium reservation method.

[0419] The second medium reservation method may further divide one or more medium reservation slots allocated to the base station device 40 and allocate them to the terminal devices 30. Fig. 35 is a diagram showing an example of the configuration of a medium synchronization reservation slot. The medium synchronization reservation slot shown in Fig. 35 is a medium reservation slot allocated to the base station device 40 by the communication control device 60. The base station device 40 schedules the terminal devices 30 within the medium synchronization reservation slot.

[0420] For example, the base station device 40 reserves medium synchronization using a portion of the medium synchronization reservation slot allocated by the communication control device 60 (the communication device slot shown in FIG. 35). The base station device 40 sets the remaining time of the medium synchronization reservation slot as a period for random reservations to the terminal device 30 (hereinafter also referred to as a terminal medium synchronization reservation period). The terminal sub-slot shown in FIG. 35 is an example of a terminal medium synchronization reservation period.

[0421] Then, the base station device 40 broadcasts information related to the terminal medium synchronization reservation period (terminal sub-slot information). The terminal device 30 uses the channel based on the broadcast information. For example, the terminal device 30 reserves the medium by randomly using the terminal sub-slots, and uses the channel based on the medium reservation. This allows the terminal device 30 to avoid inter-cell interference while reducing the possibility of inter-terminal interference within the cell.

[0422] In addition, if the terminal device 30 is a fixed device (fixed station) such as CPE (Customer Premises Equipment), the base station device 40 may perform fixed scheduling and notify the terminal device 30 of allocation slot (sub-slot) information within the media synchronization reservation slot.

[0423] <7-2. If you have a communication control device function> Next, the operation of the base station device 40 when the base station device 40 does not have the function of the communication control device 60 will be described.

[0424] The base station device 40 acquires unique information of one or more communication devices (e.g., base station devices 40 within a predetermined range) within the predetermined range. The base station device 40 acquires, as unique information, for example, installation location information, wireless interface technology information, etc., for each base station device 40 within the predetermined range. The base station device 40 then determines a medium reservation method based on the acquired unique information. At this time, the base station device 40 may notify information indicating the determined medium reservation method to the one or more communication devices within the predetermined range. The base station device 40 (one or more communication devices within the predetermined range) then performs medium reservation based on the information indicating the determined medium reservation method. In addition to the above processing, the base station device 40 may also schedule medium reservation slots in the same way as the communication control device 60 described above.

[0425] One or more communication devices within a predetermined range (for example, a base station device 40 within the predetermined range) may determine a second medium reservation method to be applied to the terminal device 30 under its management and notify the terminal device 30. The terminal device 30 may then acquire information indicating the second medium reservation method notified from the communication device, and perform medium reservation based on the acquired information indicating the second medium reservation method. For example, the terminal device 30 may perform medium reservation in a slot scheduled by the communication device.

[0426] <<8. Operations related to medium reservation of terminal device>> Next, the operation of the terminal device 30 relating to medium reservation will be described.

[0427] The terminal device 30 acquires information indicating the second medium reservation method from the base station device 40, and performs channel access based on the acquired information indicating the second medium reservation method. Note that the terminal device 30 may also acquire information indicating the medium reservation method directly from the communication control device 60, and perform channel access based on the acquired information indicating the medium reservation method.

[0428] <<9. Sequence for media reservation>> Next, the operation relating to the medium reservation of this embodiment will be described with reference to a sequence diagram.

[0429] <9-1. Operations related to media reservation> 36 is a sequence diagram showing operations relating to medium reservation. Hereinafter, operations relating to medium reservation will be described with reference to the sequence diagram shown in FIG.

[0430] First, the communication control device 60 and the base station device 40 execute the registration procedure (step S101), the usage frequency information inquiry procedure (step S102), the frequency usage permission procedure (step S103), and the frequency usage notification (step S104).

[0431] During these procedures, the acquisition unit 641 of the communication control device 60 acquires the specific information of the base station device 40 from the base station device 40. Then, the determination unit 642 of the communication control device 60 determines information related to the medium reservation method based on the acquired specific information.

[0432] Furthermore, the notification unit 643 of the communication control device 60 notifies the base station device 40 of information related to the determined medium reservation method. The acquisition unit 441 of the base station device 40 acquires information related to the medium reservation method from the communication control device 60. Note that the information related to the medium reservation method may be provided to the communication device by the frequency use permission procedure (step S103) or the frequency use notification (step S104).

[0433] After acquiring the information about the medium reservation method, the base station device 40 starts a transmission process (step S105). At this time, the base station device 40 transmits a grant signal to the terminal device 30 using the medium reservation slot allocated by the communication control device 60 (step S105a). The base station device 40 may transmit the grant signal via broadband. The grant signal may be the dedicated signal described above. The grant signal may also include information about the second medium reservation method (for example, terminal subslot information).

[0434] The acquisition unit 341 of the terminal device 30 detects the grant signal (step S106). Then, the reservation unit 342 of the terminal device 30 reserves the medium based on information about the second medium reservation method (for example, terminal subslot information), and executes communication with the base station device 40 based on the medium reservation (step S107).

[0435] <9-2. When there is another entity that determines the information> It is also possible that an entity that determines and provides information about medium reservation (hereinafter referred to as a medium reservation coordinator) exists separately from the communication control device 60. The medium reservation coordinator may be the management device 20. The medium reservation coordinator may be considered as a type of the communication control device 60.

[0436] 37 is a sequence diagram showing operations related to medium reservation when a medium reservation coordinator exists. Hereinafter, operations related to medium reservation when a medium reservation coordinator exists will be described with reference to the sequence diagram shown in FIG.

[0437] First, the communication control device 60 and the base station device 40 execute the registration procedure (step S201), the usage frequency information inquiry procedure (step S202), the frequency usage permission procedure (step S203), and the frequency usage notification (step S204).

[0438] The base station device 40 transmits a medium reservation information provision request to the medium reservation coordinator (step S205). The medium reservation information provision request may include information specific to the base station device 40. The medium reservation coordinator acquires the information specific to the base station device 40 and determines information related to the medium reservation method based on the acquired information specific to the base station device 40.

[0439] Then, the medium reservation coordinator notifies the base station device 40 of information about the determined medium reservation method (step S206). The acquisition unit 441 of the base station device 40 acquires information about the medium reservation method from the medium reservation coordinator.

[0440] After acquiring the information about the medium reservation method, the base station device 40 starts a transmission process (step S207). At this time, the base station device 40 transmits a grant signal to the terminal device 30 using the medium reservation slot allocated by the medium reservation coordinator (step S207a). The base station device 40 may transmit the grant signal via broadband. The grant signal may be the dedicated signal described above. The grant signal may also include information about the second medium reservation method (for example, terminal sub-slot information).

[0441] The acquisition unit 341 of the terminal device 30 detects the grant signal (step S208). Then, the reservation unit 342 of the terminal device 30 reserves the medium based on information about the second medium reservation method (for example, terminal subslot information), and executes communication with the base station device 40 based on the medium reservation (step S209).

[0442] <<10. Modifications>> The communication control device 60 of this embodiment is not limited to the device described in the above embodiment. For example, the communication control device 60 may be a device having a function other than controlling the base station device 40 that makes secondary use of the frequency band in which frequency sharing is performed. For example, a network manager may have the functions of the communication control device 60 of this embodiment. In this case, the network manager may be, for example, a C-BBU (Centralized Base Band Unit) in a network configuration called a C-RAN (Centralized Radio Access Network) or a device that includes the C-BBU. Furthermore, a base station (including an access point) may have the functions of the network manager. These devices (such as a network manager) can also be considered as communication control devices.

[0443] Furthermore, in the above-described embodiment, the communication control device 60 is a device that belongs to the communication system 2, but it does not necessarily have to be a device that belongs to the communication system 2. The communication control device 60 may be a device external to the communication system 2. The communication control device 60 may not directly control the base station device 40, but may indirectly control the base station device 40 via a device that constitutes the communication system 2. Furthermore, there may be multiple secondary systems (communication systems 2). In this case, the communication control device 60 may manage multiple secondary systems. In this case, each secondary system can be considered as a second wireless system.

[0444] In general, in frequency sharing, the existing system that uses the target band is called the primary system, and the secondary user is called the secondary system, but the terms primary system and secondary system may be replaced with other terms. A macrocell in a Heterogeneous Network (HetNET) may be called the primary system, and small cells or relay stations may be called secondary systems. Also, a base station may be called the primary system, and Relay User Equipment (Relay UE) or Vehicle User Equipment (Vehicle UE) that realizes D2D or V2X (Vehicle-to-Everything) within its coverage may be called the secondary system. Base stations are not limited to fixed types, and may be portable / mobile types.

[0445] Furthermore, the interfaces between the entities may be wired or wireless. For example, the interfaces between the entities (communication devices, communication control devices, or terminal devices) appearing in this embodiment may be wireless interfaces that do not depend on frequency sharing. Examples of wireless interfaces that do not depend on frequency sharing include wireless interfaces provided by mobile communication carriers via licensed bands and wireless LAN communications that use existing unlicensed bands.

[0446] The control device that controls the radio wave utilization device 10, management device 20, terminal device 30, base station device 40, intermediate device 50, or communication control device 60 in this embodiment may be realized by a dedicated computer system or a general-purpose computer system.

[0447] For example, a program for executing the above-described operations is stored in a computer-readable recording medium such as an optical disk, a semiconductor memory, a magnetic tape, or a flexible disk and distributed. Then, for example, the program is installed in a computer and the above-described processing is executed to configure a control device. In this case, the control device may be a device (e.g., a personal computer) external to the radio wave utilizing device 10, the management device 20, the terminal device 30, the base station device 40, the intermediate device 50, or the communication control device 60. Furthermore, the control device may be a device (e.g., control unit 13, control unit 23, control unit 34, control unit 44, control unit 54, or control unit 64) internal to the radio wave utilizing device 10, the management device 20, the terminal device 30, the base station device 40, the intermediate device 50, or the communication control device 60.

[0448] The communication program may also be stored in a disk device provided in a server device on a network such as the Internet, and may be downloaded to a computer. The above-mentioned functions may also be realized by cooperation between an OS (Operating System) and application software. In this case, the parts other than the OS may be stored on a medium and distributed, or may be stored in a server device and downloaded to a computer.

[0449] Furthermore, among the processes described in the above embodiments, all or part of the processes described as being performed automatically can be performed manually, or all or part of the processes described as being performed manually can be performed automatically using a known method. In addition, the information including the processing procedures, specific names, various data, and parameters shown in the above documents and drawings can be changed as desired unless otherwise specified. For example, the various information shown in each drawing is not limited to the information shown in the drawings.

[0450] Furthermore, the components of each device shown in the figure are conceptual functional components and do not necessarily have to be physically configured as shown in the figure. In other words, the specific form of distribution and integration of each device is not limited to that shown in the figure, and all or part of them can be functionally or physically distributed and integrated in any unit depending on various loads, usage conditions, etc.

[0451] The above-described embodiments can be combined as appropriate within the scope of the present invention without causing any inconsistency in the processing content. The order of the steps shown in the sequence diagrams or flowcharts of the present embodiment can be changed as appropriate.

[0452] Furthermore, for example, this embodiment can also be implemented as any configuration that constitutes an apparatus or system, such as a processor as a system LSI (Large Scale Integration), a module using multiple processors, a unit using multiple modules, a set in which other functions are added to a unit, etc. (i.e., a configuration of a part of an apparatus).

[0453] In this embodiment, a system refers to a collection of multiple components (devices, modules (components), etc.), regardless of whether all the components are in the same housing. For example, multiple devices housed in separate housings and connected via a network, etc., and a single device in which multiple modules are housed in a single housing are both systems.

[0454] Furthermore, for example, this embodiment can be configured as a cloud computing system in which one function is shared and processed jointly by a plurality of devices via a network.

[0455] <<11. Conclusion>> As described above, according to one embodiment of the present disclosure, the communication control device 60 acquires information about a plurality of base station devices 40 that use a predetermined frequency band (for example, a predetermined unlicensed band). Then, based on the acquired information, the communication control device 60 determines information about a medium reservation method for the plurality of base station devices 40 to share the predetermined frequency band. Then, the communication control device 60 notifies the base station device 40 of the information about the determined medium reservation method. The base station device 40 uses the predetermined frequency band based on the division related to the notified medium reservation method. This enables efficient medium reservation, thereby realizing effective use of radio wave resources.

[0456] Although the embodiments of the present disclosure have been described above, the technical scope of the present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the gist of the present disclosure. Furthermore, components of different embodiments and modifications may be combined as appropriate.

[0457] Furthermore, the effects of each embodiment described in this specification are merely examples and are not intended to be limiting, and other effects may also be obtained.

[0458] The present technology can also be configured as follows. (1) an acquisition unit that acquires information on one or more communication devices; a determination unit that determines a medium reservation method for the one or more communication devices to share a predetermined channel based on the acquired information; a notification unit that notifies the communication device of the determined medium reservation method. Communications control device. (2) The medium reservation method is a method in which a receiving communication device transmits a dedicated signal to a transmitting communication device to reserve the use of the specified channel, and when the transmitting communication device receives the dedicated signal, it transmits radio waves. The communication control device according to (1) above. (3) the determination unit identifies a group of communication devices that may cause interference with each other from among the plurality of communication devices, and determines the medium reservation method for each identified group. The communication control device according to (1) or (2). (4) the determining unit determines to adopt an asynchronous channel access method as the medium reservation method for the group when there is a communication device in the group that cannot synchronize with other communication devices. The communication control device according to (3) above. (5) the determining unit determines to adopt a synchronous channel access method as the medium reservation method for the group when all communication devices in the group are synchronous communication devices. The communication control device according to (3) or (4) above. (6) The synchronous channel access method is a method in which a plurality of communication devices share a channel using a synchronous frame having at least a determination period used by the communication device to reserve the medium and a channel occupation time allocated to the communication device that has reserved the medium. The communication control device according to (5) above. (7) the notification unit notifies the communication devices in the group that use the synchronous channel access method of at least information related to a reference time for synchronization. The communication control device according to (6) above. (8) the notification unit notifies, as the information related to the reference time, at least one of information on a start time of a baseline frame serving as a reference for synchronization, various time information within the baseline frame, and information on the number of frames following the baseline frame. The communication control device according to (7) above. (9) the notification unit notifies the communication device of information regarding the slot used for the medium reservation, the slot being configured by time-dividing the determination period. The communication control device according to any one of (6) to (8). (10) the determination unit determines the number of slots to be included in the judgment period based on an interference relationship between the communication devices in the group, and determines allocation of slots to each of the plurality of communication devices in the group based on information on the determined number of slots. The communication control device according to (9) above. (11) the determination unit assigns the same slot to a plurality of communication devices in the group that do not interfere with each other. The communication control device according to (10) above. (12) the determination period includes a plurality of slots each having a different priority with respect to medium reservation; The determination unit periodically or non-periodically changes the allocation of the slots. The communication control device according to (10) or (11). (13) the determination unit allocates the slot with the highest priority to a plurality of communication devices in a round robin manner. The communication control device according to (12) above. (14) the determination unit determines the allocation of the slots based on communication statuses of communication devices in the group. The communication control device according to (12) above. (15) the plurality of slots included in the determination period include reserved slots that are left unassigned to the communication device; the determination unit allocates the reserved slot to a new communication device. The communication control device according to any one of (9) to (14) above. (16) A plurality of the reserve slots are prepared, the notification unit notifies the new communication device to randomly use the plurality of reserved slots; The communication control device according to (15) above. (17) The plurality of synchronization frames include a common frame that is used in common with other communication control devices, the determining unit allocates the common frame to a predetermined communication device that has an interference relationship with a communication device managed by the other communication control device among one or more communication devices under its management; the notification unit notifies the predetermined communication device to randomly use a plurality of slots included in the common frame. The communication control device according to any one of (6) to (16). (18) an acquisition unit that acquires, from a communication control device, information on a first medium reservation method for sharing a predetermined channel with other communication devices managed by the communication control device; a determining unit that determines a second medium reservation method for one or more communication devices that it manages to share the predetermined channel based on the acquired information; a notification unit that notifies the communication device that it manages of the determined second medium reservation method. Communication equipment. (19) an acquisition unit that acquires, from a predetermined communication device, information on a medium reservation method for sharing a predetermined channel with other communication devices managed by the predetermined communication device; a reservation unit that reserves the use of the predetermined channel based on the acquired information on the medium reservation method, Communication equipment. (20) Obtaining information about one or more communications devices; determining a medium reservation scheme for the one or more communication devices to share a predetermined channel based on the acquired information; notifying the communication device of the determined medium reservation method; Communication control method. (twenty one) acquiring, from a communication control device, information on a first medium reservation method for sharing a predetermined channel with other communication devices managed by the communication control device; determining a second medium reservation method for one or more communication devices managed by the device to share the predetermined channel based on the acquired information; notifying the communication device managed by the communication device of the determined second medium reservation method; Communication method. (twenty two) obtaining, from a predetermined communication device, information on a medium reservation method for sharing a predetermined channel with other communication devices managed by the predetermined communication device; reserving the use of the predetermined channel based on the acquired medium reservation method information; Communication method. (twenty three) Computer, an acquisition unit that acquires information of one or more communication devices; a determination unit that determines a medium reservation method for the one or more communication devices to share a predetermined channel based on the acquired information; a notification unit that notifies the communication device of the determined medium reservation method; A communication control program that functions as a (twenty four) Computer, an acquisition unit that acquires, from a communication control device, information on a first medium reservation method for sharing a predetermined channel with other communication devices managed by the communication control device; a determination unit that determines a second medium reservation method for one or more communication devices that it manages based on the acquired information to share the predetermined channel; a notification unit that notifies the communication device that it manages of the determined second medium reservation method; A communication control program that functions as a (twenty five) Computer, an acquisition unit that acquires, from a predetermined communication device, information on a medium reservation method for sharing a predetermined channel with other communication devices managed by the predetermined communication device; a reservation unit that reserves the use of the predetermined channel based on the acquired information on the medium reservation method; A communication control program that functions as a [Explanation of symbols]

[0459] 1, 2, 1000 communication systems 10 Radio wave utilization equipment 20 Management device 30 Terminal Equipment 40 Base station equipment 50 Intermediate equipment 60 Communication control device 11 Processing section 12, 22, 32, 42, 52, 62 storage section 13, 23, 34, 44, 54, 64 Control section 21 Communications Department 31, 41, 51, 61 Wireless Communication Unit 33 Input / output section 43, 53, 63 Network Communications Department 311, 411 Receiving processing section 312, 412 Transmission processing unit 313, 413 antenna 341, 441, 541, 641 Acquisition Department 342 Reservation Department 442, 542, 642 Decision Section 443, 543, 643 Notification Department

Claims

1. an acquisition unit that acquires information on one or more communication devices; a determining unit that determines a medium reservation method for the one or more communication devices to share a predetermined channel based on the acquired information; a notification unit that notifies the communication device of the determined medium reservation method, The determination unit Identifying a group of communication devices that may cause interference with each other from among the plurality of communication devices; If there is a communication device in the group that cannot synchronize with other communication devices, it is determined that an asynchronous channel access method is to be adopted as the medium reservation method for the group; If all communication devices in the group are synchronous communication devices, it is determined that a synchronous channel access method is to be adopted as the medium reservation method for the group. Communications control device.

2. An acquisition unit that acquires information on one or more communication devices; a determination unit that determines a method for the one or more communication devices to share a predetermined channel based on the acquired information; a notification unit that notifies the communication device of the determined method, the information indicates whether the communication device is capable of synchronizing with another communication device; The determination unit Identifying a group of communication devices that may cause interference with each other from among the plurality of communication devices; If all communication devices in the group are synchronous communication devices, it is determined that a synchronous channel access method is to be adopted as the method for the group; If there is a communication device in the group that cannot synchronize with other communication devices, it is determined that an asynchronous channel access method is to be adopted as the method for the group. Communications control device.

3. The synchronous channel access method is a method in which a plurality of communication devices share a channel using a synchronous frame having at least a determination period used by the communication device to reserve the medium and a channel occupation time allocated to the communication device that has reserved the medium. The communication control device according to claim 1 or 2.

4. the notification unit notifies the communication devices in the group that use the synchronous channel access method of at least information related to a reference time for synchronization. The communication control device according to claim 3 .

5. the notification unit notifies, as the information related to the reference time, at least one of information on a start time of a baseline frame serving as a reference for synchronization, various time information within the baseline frame, and information on the number of frames following the baseline frame. The communication control device according to claim 4.

6. the notification unit notifies the communication device of information regarding the slot used for the medium reservation, the slot being configured by time-dividing the determination period. The communication control device according to any one of claims 3 to 5.

7. the determination unit determines the number of slots to be included in the judgment period based on an interference relationship between the communication devices in the group, and determines allocation of slots to each of the plurality of communication devices in the group based on information on the determined number of slots. The communication control device according to claim 6.

8. the determination unit assigns the same slot to a plurality of communication devices in the group that do not interfere with each other. The communication control device according to claim 7.

9. the determination period includes a plurality of slots each having a different priority with respect to medium reservation; The determination unit periodically or non-periodically changes the allocation of the slots. The communication control device according to claim 7 or 8.

10. the determination unit allocates the slot with the highest priority to a plurality of communication devices in a round robin manner. The communication control device according to claim 9.

11. the determination unit determines the allocation of the slots based on communication statuses of communication devices in the group. The communication control device according to claim 9.

12. the plurality of slots included in the determination period include reserved slots that are left unassigned to the communication device; the determination unit allocates the reserved slot to a new communication device. The communication control device according to any one of claims 6 to 11.

13. A plurality of the reserve slots are prepared, the notification unit notifies the new communication device to randomly use the plurality of reserved slots; The communication control device according to claim 12.

14. The plurality of synchronization frames include a common frame that is used in common with other communication control devices, the determining unit allocates the common frame to a predetermined communication device that has an interference relationship with a communication device managed by the other communication control device among one or more communication devices under its management; the notification unit notifies the predetermined communication device to randomly use a plurality of slots included in the common frame. The communication control device according to any one of claims 3 to 13.

15. acquiring information of one or more communication devices; a determining step of determining a medium reservation scheme for the one or more communication devices to share a given channel based on the obtained information; a notification step of notifying the communication device of the determined medium reservation method, In the determining step, Identifying a group of communication devices that may cause interference with each other from among the plurality of communication devices; If there is a communication device in the group that cannot synchronize with other communication devices, it is determined that an asynchronous channel access method is to be adopted as the medium reservation method for the group; If all communication devices in the group are synchronous communication devices, it is determined that a synchronous channel access method is to be adopted as the medium reservation method for the group. Communication control method.

16. acquiring information of one or more communication devices; a determining step of determining a scheme for the one or more communication devices to share a given channel based on the obtained information; a notification step of notifying the communication device of the determined method, the information indicates whether the communication device is capable of synchronizing with another communication device; In the determining step, Identifying a group of communication devices that may cause interference with each other from among the plurality of communication devices; If all communication devices in the group are synchronous communication devices, it is determined that a synchronous channel access method is to be adopted as the method for the group; If there is a communication device in the group that cannot synchronize with other communication devices, it is determined that an asynchronous channel access method is to be adopted as the method for the group. Communication control method.

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