Communication apparatus, control method, and program

Abstract

A communication device includes: an acquisition section configured to acquire a message containing a V2XP information field indicating a V2X communication policy, the message containing first information indicating a correspondence relationship between a communication area and a value of a radio parameter; and a control section configured to provide a function as a mobile IAB node based on the first information.

Description

Technical Field

[0001] This disclosure relates to communication equipment, control methods, and procedures. Background Technology

[0002] Within the 3rd Generation Partnership Project (3GPP) (registered trademark), standardization of IAB, an abbreviation for Integrated Access and Backhaul, is underway as a backhaul communication technology.

[0003] IAB technology is a technology that uses millimeter-wave wireless communication (which also serves as backhaul communication) in the 28 GHz band and other bands used for access communication between base stations and user equipment (UE) (Patent Document 1).

[0004] In backhaul communication using IAB technology, relays, known as IAB nodes, relay communication from the IAB donor (acting as a base station) via millimeter-wave communication. Compared to existing wired communication using fiber optics, IAB technology can extend area coverage at a lower cost.

[0005] To date, 3GPP has developed specifications for fixed base stations (non-moving IAB nodes) up to Rel-17.

[0006] Currently, 3GPP plans to actively discuss the development of specifications for vehicle relays and mobile IABs as use cases in the upcoming Rel-18, to implement these use cases.

[0007] Here, it is conceivable that various requirements have arisen that cannot be met solely by the specifications for fixed base stations currently under discussion.

[0008] One of the discussion items is "Authorization and Setup of Mobile Base Station Relays". Here, it is assumed that a mobile IAB node temporarily installed on a vehicle is used as a relay to provide services to the UE, in order to achieve special coverage and connectivity during large-scale events in urban environments or designated areas.

[0009] As a use case, 3GPP TR22.839 reports that when a mobile IAB node is present in a specific area, the mobile IAB node provides services to surrounding UEs, and when the mobile IAB node has moved outside the specific area, the mobile IAB node interrupts the provision of services.

[0010] In this regard, technologies for providing application functions and services by using the location information and mobility information of mobile nodes are known (Patent Document 2). Citation List Patent documents

[0011] Patent Document 1: Japanese Patent Application Publication No. 2019-534625 Patent Document 2: Japanese Patent Application Publication No. 2009-501453 Summary of the Invention The problem the invention aims to solve

[0012] Incidentally, when determining whether service provision should be interrupted based on whether the mobile IAB node has moved outside a specific area, it is useful to define how the specific area is defined for the mobile IAB node on a 5G system.

[0013] This invention aims to address at least one of the aforementioned challenges. One aspect of this invention is to provide a mechanism that allows mobile IAB nodes to take control of specific regions. Solution for solving the problem

[0014] One aspect of the present invention is a communication device. The communication device includes: an acquisition unit configured to acquire a message containing a V2XP information field indicating a V2X communication strategy, the message containing first information indicating a correspondence between values ​​of communication areas and radio parameters; and a control unit configured to provide functionality as a mobile IAB node based on the first information. The effects of the invention

[0015] According to one aspect of the invention, a mechanism can be provided that allows mobile IAB nodes to take control of specific areas. Attached Figure Description

[0016] Figure 1 This is a block diagram of the hardware configuration of the IAB node. Figure 2 This is a software functional block diagram of an IAB node. Figure 3A This is a message format diagram of the V2XP Info Field in the 3GPP specification. Figure 3B This is a diagram showing the format of the "Not served by E-UTRA and not served by NR" field in the 3GPP specification. Figure 3C This is a diagram showing the format of the radio parameters pergeographical area list field in the 3GPP specification. Figure 3D This is a diagram showing the format of the radio parameters pergeographical area contents field in the 3GPP specification. Figure 3EThe diagram shows the format of the geographic area contents field and the coordinate field in the 3GPP specification. Figure 3F This is a diagram showing the format of the radio parameters contents field in the 3GPP specification. Figure 4 This is a timing diagram for obtaining V2X communication strategy information and determining a specific region in the embodiment. Figure 5A This is a diagram illustrating an example (part 1) of the mobile and operational radio parameters of the mobile IAB node in this embodiment. Figure 5B This is a diagram illustrating an example (part 2) of the movement and operation radio parameters of the mobile IAB node in this embodiment. Figure 6 This embodiment is a control flowchart that controls the presence or absence of functions provided by a mobile IAB node based on radio parameters associated with area information. Figure 7 This is an illustrative diagram of the second embodiment, and a schematic diagram showing the case where two adjacent specific regions are defined as separate. Figure 8 This is a schematic flowchart illustrating an example of a process performed in a mobile IAB node according to this embodiment. Figure 9A This is a diagram illustrating a different message format from the first embodiment related to the V2XP information field message that indicates the V2X communication strategy in the 3GPP specification. Figure 9B yes Figure 9A The image shows an example of the PLMN infos field in the message format. Figure 9C This is an example diagram of V2X AS addresses. Figure 9D This is an example image of the Geographical area field. Detailed Implementation

[0017] The embodiments will be described in detail below with reference to the accompanying drawings.

[0018] [First Embodiment] Figure 1 This is a block diagram illustrating an example of the hardware configuration of an IAB node according to an embodiment.

[0019] The hardware configuration 101 associated with the IAB node includes a control unit 102, a storage unit 103, a wireless communication unit 104, a communication antenna control unit 105, a GPS communication unit 106, a GPS antenna control unit 107, and a sensor unit 108.

[0020] Control unit 102 controls the entire device by running a control program stored in storage unit 103. Control unit 102 is composed of one or more processors, such as a CPU and an MPU, and controls the entire communication device by running a control program read from RAM, which serves as storage unit 103. The processes performed by control unit 102, as described with reference to the flowchart (described later), can also be implemented using hardware circuitry such as ASICs and FPGAs. ASIC stands for Application Specific Integrated Circuit. FPGA stands for Field Programmable Gate Array. The processes described in the flowchart (described later) can be implemented through the cooperation of hardware circuitry with processors such as CPUs and MPUs.

[0021] Storage unit 103 stores the control program executed by control unit 102 and various information such as cell information, connection terminal information, IAB routing information, and location information. Storage unit 103 may include a main storage unit and an auxiliary storage unit. Examples of main storage units include read-only memory (ROM) and random access memory (RAM). The main storage unit may store or temporarily store programs and data of the operating system (OS), which is the basic software and application software executed by control unit 102. Examples of auxiliary storage units include hard disk drives (HDDs) and solid-state drives (SSDs), and may store data related to application software, etc. For example, the control program stored in the non-volatile memory area is expanded into random access memory (RAM) and executed by the processor constituting control unit 102. In this way, control unit 102 and storage unit 103 can be used as a so-called computer.

[0022] The wireless communication unit 104 performs cellular network communication compliant with 3GPP (registered trademark) specifications, such as LTE and 5G.

[0023] The communication antenna control unit 105 controls the antenna (not shown) for wireless communication performed by the wireless communication unit 104.

[0024] GPS communication unit 106 receives satellite signals from Global Positioning System (GPS) satellites to obtain location information related to the current location, including location identification information such as longitude and latitude. GPS communication unit 106 may have the function of measuring (positioning) the current location based on satellite signals.

[0025] The GPS antenna control unit 107 controls the antenna (not shown) for GPS communication performed by the GPS communication unit 106.

[0026] The sensor unit 108 collects information about the surrounding environment, such as movement speed and distance traveled. The sensor unit 108 may have functions similar to, for example, those of wheel speed sensors and image sensors mounted on a vehicle.

[0027] Figure 2 This is a block diagram illustrating a configuration example of the software function blocks of an IAB node that performs communication control functions.

[0028] The software functions 201 related to the IAB node include a signal transmission unit 202, a signal receiving unit 203, a data storage unit 204, a connection control unit 205, a notification information detection unit 206, a 5G communication control unit 207, and a notification information generation unit 208. Software functions 201 also include a GPS signal transmission unit 209, a GPS signal receiving unit 210, a GPS control unit 211, and a sensor control unit 212.

[0029] The signal transmitting unit 202 and the signal receiving unit 203 communicate with the user equipment (UE) via 3GPP-compliant cellular networks such as LTE and 5G.

[0030] Data storage unit 204 stores and maintains the software itself, IAB routing information, information related to connected user equipment, location information, and movement path information.

[0031] The connection control unit 205 controls the antenna for wireless communication performed by the wireless communication unit 104.

[0032] The notification information detection unit 206 detects notification information from surrounding IAB nodes. The notification information may be a synchronization signal / PBCH block (SSB).

[0033] The 5G communication control unit 207 connects to and disconnects from the 5G network.

[0034] The notification information generation unit 208 generates notification information to report the presence (existence) of its own IAB node.

[0035] The GPS signal transmitting unit 209 and the GPS signal receiving unit 210 communicate with the terminal device in accordance with the GPS standard.

[0036] GPS control unit 211 controls the antenna for GPS communication performed by GPS communication unit 106.

[0037] The sensor control unit 212 uses various sensors associated with the sensor unit 108 to perform control for collecting information about the surrounding environment, such as movement speed and movement distance.

[0038] Next, the method for defining a specific area of ​​a mobile IAB node in this embodiment will be described.

[0039] In this embodiment, the communication area information included in the V2X communication strategy parameters of 5G New Radio (NR) defined by 3GPP is determined to be a specific area.

[0040] Figures 3A to 3F This shows the message format associated with the V2XP information field message that indicates the V2X communication strategy in the 3GPP specification.

[0041] The message format is defined in TS24.588 and is designed to inform IAB nodes of the V2X communication strategy in 5G New Radio (NR) as defined by 3GPP.

[0042] exist Figure 3A In the message format 301 shown, the V2XP info type field stores information indicating that it is a policy provided for mobile IAB. In this embodiment, it is assumed that information indicating UE policies for V2X communication over PC5 is stored (example of the second information).

[0043] like Figure 3A As shown, the fields of message format 301 store nested information, such as update cycle information for parameters like radio parameters, wireless settings and communication area information, which constitute V2X communication strategy information.

[0044] Figure 3B The message format 302 shown involves the field "not served by E-UTRA and not served by NR" in the V2XP information field message format.

[0045] The E-UTRA radio parameters per geographical area list in message format 302 stores parameters associated with radio settings and communication area information. This also applies to the NR radio parameters per geographical area list field.

[0046] Figure 3C The illustrated message format 303 involves a list field for radio parameters by geographic region. Fields related to message format 303 are stored in a list of E-UTRA radio parameters by geographic region. Alternatively, fields related to message format 303 may be stored in a list field for NR radio parameters by geographic region.

[0047] The fields associated with message format 303 consist of multiple radio parameters per geographical area info fields (example of the first information) associated with radio parameters and communication area information. Within the communication area, operation is expected to utilize the radio parameters associated with the communication area.

[0048] Figure 3D The message format 304 shown relates to a content field for radio parameters by geographic region. Fields associated with message format 304 are stored in an information field for radio parameters by geographic region.

[0049] Figure 3E The message formats 305 and 306 shown relate to messages stored in the content fields of radio parameters by geographic region. Message format 305 relates to the geographic region content field. Message format 306 relates to the coordinate field.

[0050] The geographic region content field associated with message format 305 consists of multiple coordinate fields.

[0051] Message format 306, which is associated with coordinate fields, consists of a latitude field and a longitude field. These fields store the corresponding latitude and longitude and uniquely indicate the coordinate points used to indicate the communication area.

[0052] In the geographic region content field indicated by message format 305, there are multiple coordinate points indicated by message format 306. As a result, the area formed by connecting these coordinate points can be uniquely identified as the communication area.

[0053] Here, the format of the latitude and longitude fields shown in message format 306 will be described.

[0054] According to the format specified in Section 6.1 of TS23.032, latitude-related information and longitude-related information stored in the fields are encoded and stored in 24-bit format.

[0055] Figure 3F The message format 307 shown involves a radio parameter content field. The radio parameter content field is stored in the radio parameter content field by geographic region.

[0056] Depending on whether the setting is intended for E-UTRA or NR, different radio parameters are set in the Radio Parameter Content field of this field.

[0057] If the configuration is intended for E-UTRA, the SL-V2X-Preconfiguration parameter as specified in Section 9 of TS36.331 is set in this field. If the configuration is intended for NR, the SL-Preconfiguration NR parameter as specified in Section 9.3 of TS38.331 is set in this field. Instead of or in addition to SL-Preconfiguration NR, radio parameters for mobile IAB may also be stored due to future installation of parameters in the Radio Parameter Content field.

[0058] The radio parameters set in the Radio Parameters content field can be as follows: Radio parameters can include the frequencies available in the specific region, the radio channels available in the specific region, and the radio wave strength available in the specific region. Radio parameters can also include the IP addresses available in the specific region and the service IDs available in the specific region.

[0059] Figures 3A to 3F The message formats 301 to 307 shown relate to V2XP information field messages indicating V2X communication strategies in the 3GPP specification. In this embodiment, geographic area information stored in the information field of radio parameters by geographic area as defined in message format 303 is used. In other words, the geographic area information is used as decision information for controlling whether to provide functionality as a mobile IAB node within or outside a specific area.

[0060] Next, we will refer to Figure 4 This embodiment describes the sequence for obtaining V2X communication strategy information and determining a specific region.

[0061] The mobile IAB node 401, consisting of hardware configuration 101 and software function 201, conducts a V2X communication policy provisioning process with the PCF to obtain V2X communication policy information. The V2X communication policy provisioning process is also called the V2X policy provisioning procedure, and PCF is an abbreviation for Policy Control Function.

[0062] Mobile IAB node 401 sends a request message to request a V2X communication policy. Specifically, in S411, mobile IAB node 401 sends a UE policy provisioning request message to PCF 402. The UE policy provisioning request message contains a request to specify the communication policy set for mobile IAB 401.

[0063] When PCF 402 receives this message, PCF 402 responds in S412 with a MANAGE UEPOLICY COMMAND message.

[0064] The response includes V2X communication policy information, and requests that Mobile IAB Node 401 obtain the V2X communication policy information through this process. This process is defined in 3GPP specifications TS24.587 and TS24.501. In this case, the V2X communication policy is re-acquired when the V2X communication policy has expired, or when there is currently no valid setting on the Mobile IAB Node—that is, when it is determined that the V2X communication policy needs to be re-acquired due to anomaly detection.

[0065] After the mobile IAB node 401 obtains the V2X communication policy information according to the 3GPP specification, the mobile IAB node 401 stores the obtained V2X communication policy information in S413.

[0066] Finally, based on the V2X communication strategy information obtained in S414, the mobile IAB node 401 analyzes the information fields of radio parameters by geographic region defined in 303. Then, the mobile IAB node 401 determines the communication area information stored in the various geographic area information as the specific area information of the mobile IAB node 401.

[0067] At this point, the mobile IAB node 401 performs the conversion processing of the latitude and longitude fields in message format 306. As mentioned above, the latitude and longitude fields indicate the coordinates of each of the multiple coordinate points present in the geographic area content field shown in message format 305.

[0068] The latitude and longitude fields store latitude and longitude information encoded in 24 bits, respectively. The mobile IAB node 401 decodes the data according to the format shown in Section 6.1 of STS 23.032 and pre-determines the latitude and longitude of each coordinate point. The mobile IAB node 401 can maintain the decoded latitude and longitude information separately within the mobile IAB node.

[0069] Thus, in this embodiment, the mobile IAB node 401 acquires V2X communication policy information defined in the 3GPP specification. Then, the mobile IAB node 401 specifies a specific area based on the communication area information stored in the V2X communication policy information.

[0070] Next, the control method for the mobile IAB node 401 moving between defined specific areas will be described.

[0071] Figure 5A and Figure 5B This is an example diagram illustrating a scenario where a mobile IAB node is moving while providing services using radio parameters associated with a specific area.

[0072] exist Figure 5A and Figure 5B In the scenario shown, the mobile IAB node 401 is currently moving within a specific area 501 and operating with radio parameters 511 associated with that area.

[0073] The radio parameters associated with this region are linked to the corresponding geographic region information contained in the V2X communication policy information defined in the 3GPP specification. In this case, the radio parameters are stored in the content field of the radio parameters by geographic region as shown in message format 307. The radio parameters can be SL-V2X-Preconfiguration parameters or SL-Preconfiguration NR parameters. Alternatively, the radio parameters can be the radio parameters of the mobile IAB.

[0074] Then, the mobile IAB node 401 continues to move in the direction of the arrow and moves between regions from a specific region 501 to a specific region 502 at a specific timing.

[0075] Here, as specified in 3GPP specification TR 22.839, the mobile IAB node 401 that has moved between areas is likely to have a mechanism for interrupting service provision. In the case of the above mechanism, the mobile IAB node 401 that has moved between areas switches to operating using radio parameters 512 associated with the area to which the mobile IAB node 401 has moved, and service provision is restored.

[0076] However, there are cases where radio parameters 511 associated with a specific area 501 before movement are included in radio parameters 512 associated with a specific area 502 at the destination. For example, suppose that in the radio parameters, for radio parameter 511, the value of parameter α falls within the range a1 ≤ α ≤ b1, and for radio parameter 512, the value of parameter α falls within the range a2 ≤ α ≤ b2. In this case, if a2 ≤ a1 and b2 ≥ b1, then for parameter α, radio parameter 511 is included in radio parameter 512. In this case, while the setting of radio parameter 511 remains unchanged, the mobile IAB node 401 can continue to operate even in the specific area 502. Therefore, in this embodiment, in this case, the mobile IAB node 401 continues to provide services as is without interruption.

[0077] Figure 6 This is a schematic flowchart illustrating an example of the processing performed in a mobile IAB node (mobile IAB node 401) according to this embodiment. In this flowchart, in the mobile IAB node, service provisioning functions are controlled based on radio parameters associated with specific area information.

[0078] First, the mobile IAB node 401, which has already started operating in F601, performs the process of acquiring V2X policy information according to the 3GPP specification and determining specific areas in F602.

[0079] The specific processing details in F602 are as follows: Figure 4 The flowchart shown illustrates the implementation. The processing of F602 can be executed only initially, and subsequently, only when predetermined conditions are met. In this case, the predetermined conditions can be met based on factors such as the elapsed time, or based on updates to V2X policy information.

[0080] In F602, the specific region related to the process of determining a specific region can include not only the specific region to which the current location of the mobile IAB node 401 belongs, but also surrounding specific regions that are different from that specific region. For example, when a movement path is predetermined, one or more specific regions along the movement path become the targets to be determined.

[0081] Subsequently, in F603, the mobile IAB node 401 performs a process to determine a specific area for itself. In other words, the mobile IAB node 401 specifies the specific area to which its current location belongs. While moving, the mobile IAB node 401 monitors which of the multiple specific areas determined in S414 its current location falls within. Here, the current location of the mobile IAB node 401 is determined based on the longitude and latitude information acquired by the GPS communication unit 106.

[0082] Subsequently, the mobile IAB node 401 determines in F604 whether its own node has moved between regions.

[0083] When the specific region currently located, as determined in F603, is different from the previous specific region, the judgment process determines that the node itself has moved between regions.

[0084] This judgment process is performed together with F603 at fixed intervals. When it is determined that the mobile IAB node 401 has not moved between areas, the F603 check process is performed again after a specific time period, and the F604 judgment process for moving between areas continues.

[0085] When the mobile IAB node 401 determines in F604 that it has moved between areas, the mobile IAB node 401 then performs a judgment process in F605. Specifically, the mobile IAB node 401 determines whether the values ​​of radio parameters associated with a specific area where its node already existed before the move are also operable in the specific area where its node exists after the move.

[0086] Examples of decision processing include whether the value of radio parameter 511 associated with a specific area 501 before the move is included in the value of radio parameter 512 associated with a specific area 502 after the move.

[0087] For example, suppose radio parameters 511 and 512 both include a number of common parameters (here, five parameters A1 to A5). In this case, for each of parameters A1 to A5, it can be determined whether the value of radio parameter 511 is included in the value of radio parameter 512. In other words, it is determined whether the value of parameter A1 in radio parameter 511 is included in the value of parameter A1 in radio parameter 512. Furthermore, it is determined whether the value of parameter A2 in radio parameter 511 is included in the value of parameter A2 in radio parameter 512. This also applies to the other parameters A3 to A5. Then, for each of the five parameters A1 to A5, the determination can be affirmative when the value of radio parameter 511 is included in the value of radio parameter 512. In other words, it can be determined that the value of a radio parameter associated with a specific area where its own node already existed before the movement is also available in the specific area where its own node exists after the movement.

[0088] In the case where, for example, parameter A1 is an available radio channel, the value of radio parameter 511 is channels β1 and β2, and the value of radio parameter 512 is β1, as described above. In this case, the value of radio parameter 511 is not included in the value of radio parameter 512. However, in a variant, since channel β1 is public, it can be determined that the value of this parameter is also available in the specific area where its own node exists after the move. In this case, for example, higher-level software can disable the use of channel β2 (used in the specific area where its own node exists after the move).

[0089] In this decision-making process, when the decision is affirmative, the mobile IAB node 401 continues to provide the currently running service as before in the specific area after the move, in F606. In other words, the mobile IAB node 401 prohibits the interruption of service provision due to movement between areas. Then, after a specific period of time, assuming that the new specific area 502 is a specific area where its own node already exists, the process resumes from F603.

[0090] In this decision process, if the decision is negative, the mobile IAB node 401 interrupts service provision in F607. In this case, the mobile IAB node 401 restarts service based on the values ​​of radio parameters associated with the specific area after relocation, and resumes service provision in the specific area after relocation.

[0091] Thus, according to this embodiment, when a mobile IAB node moves outside a specific area, the mobile IAB node determines whether to interrupt service provision. At this time, based on information indicating the correspondence between the specific area and radio parameters, it can be determined whether the values ​​of the radio parameters associated with the specific area are also available outside the specific area. As a result, compared to a complete interruption of service provision, the frequency of service interruptions can be reduced, and service can be provided more efficiently.

[0092] Incidentally, in mechanisms that use the correspondence between specific areas and radio parameter values, it is useful to determine how mobile IAB nodes define specific areas in a 5G system. In this respect, in this embodiment, as described above, specific areas can be defined using messages containing V2XP information fields that indicate V2X communication strategies in 5G NR.

[0093] [Second Embodiment] In the first embodiment, a control method was described for the case where a mobile IAB node moves between two consecutive specific areas. Here, other embodiments of the control method for the case where a mobile IAB node moves between two discontinuous specific areas will be described.

[0094] Figure 7This is an illustrative diagram of the second embodiment, and a schematic diagram showing the case where two adjacent specific regions are defined as separate.

[0095] For example, in the case of a method for defining a specific region according to the first embodiment, such as Figure 7 This schematically illustrates that two adjacent specific regions can be discontinuous by definition. For example, in Figure 7 In the example shown, two adjacent specific regions 501 and 503 are defined as separate. In this case, see below for reference. Figure 8 The described method enables control based on, for example, the distance between two adjacent specific regions.

[0096] Figure 8 This is an illustrative flowchart illustrating an example of a process performed in a mobile IAB node (mobile IAB node 401) according to this embodiment.

[0097] Figure 8 The processing shown is related to the first embodiment described above. Figure 6 The difference shown in the processing is that F604 is replaced by F604A and F604B. Figure 8 The processing shown is related to the first embodiment described above. Figure 6 The difference in the processing shown is that F607 is replaced by F607A to F607C.

[0098] In F604A, the mobile IAB node 401 determines whether it is moving from a specific area where it was located in the previous cycle to another specific area (hereinafter referred to as the "target specific area"). In other words, the mobile IAB node 401 determines whether its current location does not belong to any specific area, but the mobile IAB node 401 can move to another specific area. When the planned movement path of the mobile IAB node 401 is pre-set, the target specific area can be specified based on the planned movement path. Figure 7 The example shown schematically illustrates the state where the mobile IAB node 401 is moving from a specific area 501 to a specific area 503. When the result of the judgment in F604A is positive, the process proceeds to F604B; otherwise, the process returns to S603.

[0099] In F604B, the mobile IAB node 401 determines whether the distance from its nearest specific area to the target specific area (the distance between specific areas) is shorter than or equal to a threshold. The threshold can be freely set and can be a relatively small value (e.g., the distance that can be moved in one minute). The threshold can be changed based on the moving speed of the mobile IAB node 401. For example, the threshold can be changed to decrease as the moving speed of the mobile IAB node 401 increases. If the determination in F604B is positive, the process proceeds to F605; otherwise, the process proceeds to F607A.

[0100] In F607A, the mobile IAB node 401 interrupts service provision. Then, the mobile IAB node 401 enters a standby state to complete the movement to the target-specific area (F607B). When the movement to the target-specific area is completed ("Yes" in F607B), the process proceeds to S607C.

[0101] In F607C, the mobile IAB node 401 restarts service based on the values ​​of radio parameters associated with the specific area after relocation, and restores service provision in the specific area after relocation.

[0102] The second embodiment with this configuration also achieves similar advantageous effects to the first embodiment described above. In particular, according to this embodiment, when the mobile IAB node 401 moves between two specific areas, control based on the distance between the two specific areas can be achieved even when the two specific areas are defined as separate.

[0103] In the example above, the decision for F604B is based on the distance between specific areas (an example of a predetermined parameter); however, this configuration is not limited to this. Any parameter related to the distance or duration (time for movement) from the nearest specific area to the target specific area can be evaluated. In this case, the value of the parameter used for the decision can be calculated based on at least one of the planned movement path of the node (moving IAB node 401), the movement speed of the node, and the positional relationship between the node's current position and the target specific area. Alternatively or in addition, the parameter value used for the decision can also be based on the node's exit from the nearest specific area ( Figure 7 The time elapsed after a specific region (501) is used for calculation.

[0104] [Third Embodiment] In the first embodiment, a method for defining a specific region in a mobile IAB node and a control method for the mobile IAB node moving between regions have been described. Here, other embodiments of the method for defining a specific region in a mobile IAB node will be described.

[0105] Figures 9A to 9D An alternative message format 901, different from the first embodiment, is shown in relation to a V2XP information field message that indicates a V2X communication strategy in the 3GPP specification.

[0106] Figure 9A The message format 901 shown is defined in TS24.588 and is intended to inform IAB nodes of the V2X communication strategy in 5G New Radio (NR) as defined by 3GPP.

[0107] The V2XP Information Type field of message format 901 stores information indicating that it is a policy provided for mobile IAB. In this embodiment, information indicating UE policies for V2X communication over Uu is stored in the V2XP Information Type field.

[0108] The fields of message format 901 store nested information such as parameter update cycle information, service identifier, radio parameters, and communication area information (which constitute V2X communication policy information). In this embodiment, the communication area information is stored in message format 901. This will be described in more detail later. Figure 9A The PLMN information field 902 shown is illustrated in more detail in Figure 9B In field 902. Figure 9B The PLMN information fields 1 to n shown in 902 are shown in more detail in field 903. Field 903 includes additional information such as the service identifier and V2X-related information. This additional information will be described. Information unrelated to the V2X service identifier in field 903 is shown in more detail in... Figure 9C In field 904. Figure 9C The V2X AS address shown in field 904 is shown in more detail in field 905. Field 905 includes V2X AS address fields 1 to n, and each field is shown in more detail in... Figure 9D In field 906. Field 906 includes geographic region field 907. This field can store... Figure 3E The latitude and longitude information is in the format shown in Figures 305 and 306. In this embodiment, the mobile IAB node 401 only needs to be configured to determine a specific region by decoding the geographic region field 907.

[0109] The third embodiment with such a configuration also achieves similar advantageous effects to the first embodiment described above.

[0110] The embodiments have been described in detail above; however, they are not limited to these specific embodiments. Various modifications and alterations can be made within the scope of the appended claims. All or part of the components of the above embodiments can also be combined.

[0111] This invention is not limited to the embodiments described above. Various changes and modifications are applicable without departing from the spirit and scope of the invention. Therefore, the appended claims are attached to illustrate the scope of the invention.

[0112] This application claims priority to Japanese Patent Application 2023-078137, filed on May 10, 2023, the entire contents of which are incorporated herein by reference. List of reference numerals

[0113] 101 Hardware Configuration 102. Control Unit (Examples of acquisition components, judgment components, detection or prediction components, position acquisition components, calculation components, and control components) 103 storage units 104 Wireless Communication Unit (Example of Acquisition Component) 105 Communication Antenna Control Unit 106 GPS communication units 107 GPS Antenna Control Unit 108 sensor units 201 Software Functions 202 Signal Transmission Unit 203 Signal Receiving Unit 204 data storage units 205 Connection Control Unit 206 Notification Information Detection Unit 207 5G Communication Control Unit 208 Notification Information Generation Unit 209 GPS signal transmission unit 210 GPS signal receiving unit 211 GPS Control Unit 212 Sensor Control Unit 401 Mobile IAB Node 501 Specific Region (Example of the First Specific Region) 502 Specific Area (Example of a Second Specific Area) 503 Specific Area (Example of a Second Specific Area) 511 Radio Parameters (Example of First Radio Parameters) 512 Radio Parameters (Example of Second Radio Parameters)

Claims

1. A communication device, comprising: The acquisition component is configured to acquire a message containing a V2XP information field indicating a V2X communication strategy, the message containing first information indicating a correspondence between values ​​of communication areas and radio parameters; as well as A control unit configured to provide functionality as a mobile IAB node based on the first information.

2. The communication device according to claim 1, wherein, The first information is included in the "Not E-UTRA Service and Not NR Service" field of the V2XP information field.

3. The communication device according to claim 2, wherein, The first information is included in the list field of E-UTRA radio parameters by geographic region in the field that is not E-UTRA serviced and not NR serviced, or in the list field of NR radio parameters by geographic region in the field that is not E-UTRA serviced and not NR serviced.

4. The communication device according to any one of claims 1 to 3, wherein, The acquisition component is configured to acquire the message as a response to a request message used to request a V2X communication policy from the PCF.

5. The communication device according to claim 4, wherein, The request message includes a request to specify a communication policy for the mobile IAB settings, and The V2XP information type field in the acquired V2XP information field contains second information, which indicates that the communication policy set for the mobile IAB has been specified.

6. The communication device according to claim 5, wherein, The second information is information indicating the UE policy for V2X communication via PC5.

7. The communication device according to any one of claims 1 to 6, further comprising: The location acquisition component is configured to acquire the current location information of its own node. The control unit is configured to identify the communication area in which its own node is currently located based on the current location information, and to provide the function based on the values ​​of the radio parameters associated with the identified communication area in the communication area.

8. The communication device according to claim 7, further comprising: A detection or prediction component is configured to detect or predict inter-regional movement of the node from a first specific region to a second specific region, wherein the first specific region is the communication region in which the node is currently located, and the second specific region is a communication region different from the first specific region. The control component is configured to determine, when the detection or prediction component detects or predicts movement between the regions, whether the functionality provided in the first specific region can continue to be provided in the second specific region.

9. The communication device according to claim 8, wherein, The control unit is configured to determine that the function can continue to be provided in the second specific area when a first value of the radio parameter associated with the first specific area is operable in the second specific area.

10. The communication device according to claim 9, wherein, The control unit is configured to determine that the first value of the radio parameter associated with the first specific region is also operable in the second specific region when the first value of the radio parameter associated with the first specific region is included in the second value of the radio parameter associated with the second specific region.

11. The communication device according to any one of claims 8 to 10, wherein, The radio parameters include at least one of the following: available frequency, available radio channel, available radio wave strength, available IP address, and available service ID.

12. The communication device according to any one of claims 8 to 11, wherein, The radio parameters include at least one of the SL-V2X-Preconfiguration parameters and the SL-Preconfiguration NR parameters.

13. The communication device according to any one of claims 8 to 12, further comprising: The determining component is configured to determine whether the first specific region and the second specific region are adjacent to each other. The control component is configured to determine, based on the determination result of the determination component and the fact that the first specific region and the second specific region are adjacent to each other, that the function can continue to be provided in the second specific region.

14. The communication device according to any one of claims 8 to 13, further comprising: A calculation unit is configured to calculate the value of a predetermined parameter indicating the travel time or distance associated with movement from the first specific area to the second specific area. The control component is configured to determine that the function cannot be continued to be provided in the second specific area when the value of the predetermined parameter exceeds a threshold.

15. The communication device according to claim 14, wherein, The computing unit is configured to derive the value of the predetermined parameter based on at least one of the following: the planned movement path of its own node, the movement speed of its own node, the positional relationship between the current position of its own node and the second specific region, and the time elapsed after its own node has left the first specific region.

16. A control method for controlling communication, the control method comprising: Obtain a message containing a V2XP information field indicating a V2X communication strategy, the message containing first information indicating the correspondence between values ​​of communication areas and radio parameters; as well as Based on the first information, provide functionality as a mobile IAB node.

17. A program for causing a computer to perform the following steps, the steps comprising: Obtain a message containing a V2XP information field indicating a V2X communication strategy, the message containing first information indicating the correspondence between values ​​of communication areas and radio parameters; as well as Based on the first information, provide functionality as a mobile IAB node.

Images