JP2020188405A - Communication terminal device, mobile body, communication system, communication method, and program - Google Patents

Abstract

To provide a communication system in which a transmission-side communication terminal device can transmit data by designating an area where a reception-side communication terminal device is located by direct wireless communication method.SOLUTION: A first communication terminal device 31 (1) transmits, by direct wireless communication method, data to which a communication identifier yyy corresponding to a specific management area located around the current position of the first communication terminal device is added as a transmission-destination communication identifier. A second communication terminal device 31 (2) makes received data usable in an application if the transmission-destination communication identifier yyy added to the received data by direct wireless communication method coincides with a communication identifier corresponding to a management area including the current position of the second communication terminal device 31 (2).SELECTED DRAWING: Figure 2

Description

The present invention relates to a communication terminal device used for communication between mobile bodies, a mobile body and a communication system provided with the communication terminal device, and a communication method and a program.

In the LTE (Long Term Evolution) and next-generation (NR) specifications of 3GPP (3rd Generation Partnership Project), V2V (Vehicle-to-Vehicle) and V2I (Vehicle-to) do not go through the mobile communication network (core network). -Sidelink method for direct wireless communication between short-range devices (D2D: Device-to-Device) such as Infrastructure), V2P (Vehicle-to-Pedestrian), V2X (Vehicle-to-Everything) using an interface called PC5. (Hereinafter referred to as "PC5 communication method") standard specifications have been established (see Non-Patent Documents 1, 2, 3 and 4).

In the PC5 communication method, a communication identifier (hereinafter, "frame identifier" or "Layer-2 ID") that identifies a frame (also referred to as a "MAC packet") which is a data processing unit of layer 2 (L2) in the layered communication model. ) Is defined. The communication terminal device on the transmitting side uses, for example, a part of the uplink radio resource of mobile communication, specifies the frame identifier (Destination Layer-2 ID) of the transmission destination (communication destination) in the header, and contains the data. Is sent. In the communication terminal device on the receiving side, for example, the frame identifier (Destination Layer-2 ID) of the destination included in the header of the received frame matches the frame identifier (Layer-2 ID) assigned to the own device. If so, or it matches the group frame identifier (Layer-2 Group ID) assigned to a predetermined service (for example, a service based on proximity between devices (ProSe: Device-to-Device Proximity Service)). In this case, the packet containing the data (message) of the frame can be raised to the upper layer and used for the application of the service.

3GPP TS 23.285 V16.0.0 (2019-03), 3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Architecture enhancements for V2X services (Release 16) 3GPP TS 23.303 V15.1.0 (2018-06), 3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Proximity-based services (ProSe); Stage 2 (Release 15) 3GPP TS 24.386 V15.2.0 (2018-12), 3rd Generation Partnership Project; Technical Specification Group Core Network and Terminals; User Equipment (UE) to V2X control function; protocol aspects; Stage 3 (Release 15) 3GPP TR 38.885 V16.0.0 (2019-03), 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Study on NR Vehicle-to-Everything (V2X) (Release 16)

In the above-mentioned conventional PC5 communication method, the data transmitted from the transmitting side communication terminal device is received and used by the receiving side communication terminal device in a specific area located around the current position where the transmitting side communication terminal device is located. There is a problem that it cannot be designated as a possible area.

The mobile communication system according to one aspect of the present invention is a communication system including a first communication terminal device and a second communication terminal device capable of communicating with each other by a direct wireless communication method. In this communication system, the first communication terminal device sets a communication identifier corresponding to a specific management area selected from a plurality of different management areas constituting a target area to which the communication terminal device can move as a transmission destination communication identifier. The data added as is transmitted by the direct wireless communication method, and in the second communication terminal device, the communication identifier of the transmission destination added to the data received by the direct wireless communication method is the second communication. The received data is made available to the application when it matches the communication identifier corresponding to the management area including the current position of the terminal device.
In the communication system, the first communication terminal device acquires map information in which a communication identifier is associated with each management area for a plurality of different management areas constituting a target area to which the communication terminal device can move. A plurality of map information acquisition means, a position information acquisition means for acquiring the position information of the current position of the first communication terminal device, and a plurality of management areas corresponding to a plurality of management areas around the current position by referring to the map information. Data in which an identifier selection means for acquiring a communication identifier and selecting a communication identifier corresponding to the specific management area from the plurality of communication identifiers and a communication identifier corresponding to the specific management area are added as transmission destination communication identifiers. Is provided with a data transmission means for directly transmitting the data by a wireless communication method.
In the communication system, the identifier selection means may select a communication identifier corresponding to the specific management area according to at least one of a communication service type and a communication application.
In the communication system, the second communication terminal device acquires map information in which a communication identifier is associated with each management area for a plurality of different management areas constituting a target area to which the communication terminal device can move. The map information acquisition means, the position information acquisition means for acquiring the position information of the current position of the second communication terminal device, and the management area including the current position of the second communication terminal device with reference to the map information. The second communication terminal device includes an identifier acquisition means for acquiring a corresponding communication identifier, a data receiving means for receiving data by the direct wireless communication method, and a transmission destination communication identifier added to the received data. A data processing means for making the received data available to the application when it matches the communication identifier corresponding to the management area including the current position of the data may be provided.
In the communication system, the first server further includes a server that stores map information in which the communication identifier is associated with each management area for a plurality of management areas that are different from each other and constitutes a target area to which the communication terminal device can move. The communication terminal device and the second communication terminal device may each receive and acquire the map information from the server.
In the communication system, the first communication terminal device transmits data to which a communication identifier corresponding to the specific management area and identification information of a communication priority are added by the direct wireless communication method, and the first is said. When the second communication terminal device receives a plurality of data in which a communication identifier corresponding to a management area including the current position of the second communication terminal device is added as a communication identifier of the destination, the plurality of data are added to each of the plurality of data. Based on the added identification information of the priority, the data having a high priority may be preferentially made available to the application.
In the communication system, a plurality of communication identifiers having different communication priorities are associated with each of a plurality of management areas different from each other constituting a target area to which the communication terminal device can move, and the first communication terminal device is associated with each other. Transmits data including a communication identifier selected from the plurality of communication identifiers according to the priority of communication by the direct wireless communication method, and the second communication terminal device is the second communication terminal device. When a plurality of data in which any one of the plurality of communication identifiers corresponding to the management area including the current position is added as the communication identifier of the destination is received, based on the communication identifier added to each of the plurality of data. , Higher priority data may be preferentially made available to the application.
In the communication system, a plurality of communication identifiers in which the moving directions of the communication terminal devices in the management area are different from each other are associated with each of a plurality of different management areas constituting a target area in which the communication terminal device can move. You may.

The communication terminal device according to another aspect of the present invention is a communication terminal device capable of communicating by a direct wireless communication method. This communication terminal device is a map information acquisition means for acquiring map information in which a communication identifier is associated with each management area for a plurality of different management areas constituting a target area to which the communication terminal device can move, and the communication. With reference to the position information acquisition means for acquiring the position information of the current position of the terminal device and the map information, a plurality of communication identifiers corresponding to a plurality of management areas around the current position are acquired, and the plurality of communication identifiers are obtained. Therefore, an identifier selection means for selecting a communication identifier corresponding to a specific management area located around the current position of the communication terminal device and a communication identifier corresponding to the specific management area are added as transmission destination communication identifiers. A data transmission means for directly transmitting data by a wireless communication method is provided.
In the communication terminal device, the identifier selection means may select a communication identifier corresponding to the specific management area according to at least one of a communication service type and a communication application.
In the communication terminal device, an identifier acquisition means for referring to the map information and acquiring a communication identifier corresponding to a management area including the current position of the communication terminal device, and a data receiving means for receiving data by the direct wireless communication method. And, when the communication identifier of the destination added to the received data matches the communication identifier corresponding to the management area including the current position of the communication terminal device, the received data is used in the application. Further may be provided with a data processing means that enables it.

The communication terminal device according to still another aspect of the present invention is a communication terminal device capable of communicating by a direct wireless communication method. This communication terminal device is a map information acquisition means for acquiring map information in which a communication identifier is associated with each management area for a plurality of different management areas constituting a target area to which the communication terminal device can move, and the communication. The position information acquisition means for acquiring the position information of the current position of the terminal device, the identifier acquisition means for acquiring the communication identifier corresponding to the management area including the current position of the communication terminal device by referring to the map information, and the direct The data receiving means for receiving data by the wireless communication method and the communication identifier of the destination added to the received data match the communication identifier corresponding to the management area including the current position of the communication terminal device. In some cases, the data processing means for making the received data available to the application is provided.
In the communication terminal device, the map information is stored from a map server that stores map information in which communication identifiers are associated with each management area for a plurality of different management areas constituting a target area to which the communication terminal device can move. It may be received and acquired.
In the communication terminal device, data to which the communication identifier and the identification information of the communication priority are added is transmitted by the direct wireless communication method, and the communication identifier corresponding to the management area including the current position of the communication terminal device is transmitted. When a plurality of data added as the communication identifier of the destination is received, the data having a high priority can be preferentially used in the application based on the identification information of the priority added to each of the plurality of data. It may be.
In the communication terminal device, a plurality of communication identifiers having different communication priorities are associated with each of a plurality of management areas different from each other constituting a target area to which the communication terminal device can move, and from the plurality of communication identifiers. Data including a communication identifier selected according to the priority of communication is transmitted by the direct wireless communication method, and any one of a plurality of communication identifiers corresponding to a management area including the current position of the communication terminal device is transmitted to the transmission destination. When a plurality of data added as the communication identifiers of the above are received, the data having a high priority may be preferentially used in the application based on the communication identifiers added to each of the plurality of data.
In the communication terminal device, a plurality of communication identifiers in which the movement directions of the communication terminal devices in the management area are different from each other are associated with each of a plurality of different management areas constituting a target area in which the communication terminal device can move. You may be.
In the communication terminal device, the direct wireless communication method is a direct wireless communication method using the PC5 interface included in the standard specifications of 3GPP, and the communication identifier includes the data in the data link layer of the layered communication model. It may be a frame identifier.

The mobile body according to still another aspect of the present invention includes any of the above-mentioned communication terminal devices.

The communication method according to still another aspect of the present invention is a communication method between a plurality of communication terminal devices by a direct wireless communication method. In this communication method, the first communication terminal device uses a communication identifier corresponding to a specific management area selected from a plurality of different management areas constituting a target area to which the communication terminal device can move as a transmission destination communication identifier. The added data is transmitted by the direct wireless communication method, and the communication identifier of the transmission destination added to the data received by the second communication terminal device by the direct wireless communication method is the second communication. It includes making the received data available to the application when it matches the communication identifier corresponding to the management area including the current position of the terminal device.

The program according to still another aspect of the present invention is a program executed by a computer or a processor provided in a communication terminal device capable of communicating by a direct wireless communication method, and constitutes a target area in which the communication terminal device can move. A program code for acquiring map information associated with a communication identifier for each of the plurality of different management areas, a program code for acquiring the position information of the current position of the communication terminal device, and the map. It is located around the current position of the communication terminal device from the program code for referring to the information and acquiring a plurality of communication identifiers corresponding to the plurality of management areas around the current position and the plurality of communication identifiers. A program code for selecting a communication identifier corresponding to a specific management area and a program for directly transmitting data in which a communication identifier corresponding to the specific management area is added as a transmission destination communication identifier by a direct wireless communication method. Includes code and.

The program according to still another aspect of the present invention is a program executed by a computer or processor provided in a communication terminal device capable of communicating by a direct wireless communication method. This program includes a program code for acquiring map information in which a communication identifier is associated with each management area for a plurality of different management areas constituting a target area to which the communication terminal device can move, and the communication terminal device. The program code for acquiring the position information of the current position of the communication terminal device, the program code for acquiring the communication identifier corresponding to the management area including the current position of the communication terminal device by referring to the map information, and the direct radio. The program code for receiving data by the communication method and the communication identifier of the destination added to the received data match the communication identifier corresponding to the management area including the current position of the communication terminal device. In some cases, it includes program code for making the received data available to the application.

According to the present invention, the transmitting side communication terminal device can directly transmit data by designating the area where the receiving side communication terminal device is located by the wireless communication method.

Explanatory drawing which shows an example of the whole structure of the communication system which concerns on embodiment. The explanatory view which shows an example of the data communication between vehicles by the PC5 communication system which concerns on embodiment. (A) and (b) are explanatory views which show the problem in the communication system which concerns on a reference example. An explanatory diagram showing an example of associating a management area of map information managed by a map server according to an embodiment with L2ID. The block diagram which shows an example of the main part composition of the UE of the vehicle which concerns on embodiment. The block diagram which shows an example of the main part composition of the map server which concerns on embodiment. The flowchart which shows an example of the data communication procedure by the PC5 communication system in the UE of the vehicle on the receiving side which concerns on embodiment. The flowchart which shows an example of the data communication procedure by the PC5 communication system in the UE of the vehicle of the transmitting side which concerns on embodiment. The explanatory view which shows an example of the data transmission by the PC5 communication system from the UE of the vehicle which stopped hazard in the communication system which concerns on embodiment. (A) Explanatory drawing which shows an example of beam formation at the time of data transmission by the PC5 communication system in the communication system which concerns on embodiment. (B) Explanatory drawing which shows an example of beam formation at the time of data transmission by the PC5 communication system in the communication system which concerns on a comparative example. An explanatory diagram showing an example of data transmission by a PC5 communication method from a UE of a vehicle traveling on a one-way road in the communication system according to the embodiment. The explanatory view which shows an example of the mapping which performs the correspondence between the management area before the new road construction and Layer-2 ID (L2ID) in the map server which concerns on embodiment. The explanatory view which shows an example of the update of the mapping which associates Layer-2 ID (L2ID) with the management area at the time of road construction in the map server which concerns on embodiment. Explanatory drawing which shows an example of uploading communication information and location information from UE of the vehicle which concerns on embodiment to a map server. FIG. 6 is an explanatory diagram showing an example of mapping between a calculation result of propagation loss and a Layer-2 ID (L2ID) in a map server that has received the information uploaded in FIG. 14. Explanatory drawing which shows an example of uploading communication information and position information from UE of a vehicle to a map server in one-sided traffic by the road construction which concerns on embodiment. FIG. 5 is a flowchart showing an example of an information upload procedure at the time of data reception by the PC5 communication method in the UE of the receiving vehicle according to the embodiment. FIG. 5 is a flowchart showing an example of an information upload procedure at the time of data transmission by the PC5 communication method in the UE of the receiving vehicle according to the embodiment. The flowchart which shows an example of the mapping procedure of Layer-2 ID (L2ID) in the map server which concerns on embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory diagram showing an example of the overall configuration of the communication system according to the present embodiment. In the communication system of the present embodiment, for example, the communication terminal device 31 of the vehicle 30 as a plurality of moving bodies traveling on the road 90 as the vehicle moving route communicates with PC5 without going through the mobile communication network (cellular network). It is suitable for communication systems capable of direct wireless communication such as V2V (Vehicle-to-Vehicle) depending on the method. The vehicle 30 in the present embodiment is, for example, an automobile such as a passenger car, a truck, or a bus, and the present invention is not limited to the type and number of vehicles. The present invention can also be applied to a case where the moving body is a moving body other than a vehicle such as a flying body or a ship that moves on a moving path set in the sky or water.

In FIG. 1, the communication system of the present embodiment includes a map server 10 that manages map information used for direct wireless communication between vehicles 30 by the PC5 communication method. The map server 10 of the present embodiment is, for example, a MEC (Multi-access Edge Computing) device provided in the base station 16 of the mobile communication network 15. The map server 10 composed of the MEC device may be provided outside the node or core network between the base station 16 and the core network of the mobile communication network 15.

The map server 10 designates a communication destination by the PC5 communication method of the communication terminal device 31 for a plurality of different management areas constituting a target area (service providing area to the user) to which the communication terminal device 31 of the vehicle 30 can move. Stores map information associated with each management area with a communication identifier (for example, Layer-2 ID described later), and performs various data processing to provide map information in response to a request from the communication terminal device 31. Can be done. The map information managed by the map server 10 includes the position, shape, width W of the road 90, lanes 91R, 91L, 92U, 92D, 93U, 93D, traffic light installation position, pedestrian crossing position, presence / absence of median strip, and roadside. It may include information about the road, such as the presence or absence of guardrails.

The base station 16 forms one or more cells (also referred to as sectors or sector cells). The cell may be formed two-dimensionally on the ground or the sea, or may be formed three-dimensionally from the sky toward the ground or the sea. The cell may be a macro cell, a small cell, a femto cell, a pico cell, a large cell, or the like. The plurality of cells may form a cellular structure that is distributed so as to be two-dimensionally or three-dimensionally adjacent to each other, or may form a hierarchical cell structure in which some or all of them are hierarchically overlapped. .. The base station 16 is a macrocell base station, a small cell base station, a femtocell base station, a picocell base station, a large cell base station, a fixed base station fixedly installed on the ground, etc., and can move on the ground, at sea, in the sky, etc. It may be a type base station or the like. The base station 16 may be a wireless communication device called an eNodeB (evolved Node B: eNB), a gNodeB (gNB), an en-gNodeB (en-gNB), an access point, or the like.

The communication terminal device 31 of the vehicle 30 is a user device (hereinafter referred to as “UE”) that can be used as a subscriber of the mobile communication service. The UE 31 may be a wireless communication device called a user terminal, a terminal, a terminal device, a mobile station, a mobile device, or the like. The UE 31 of the vehicle 30 may be a device used in a state of being carried by the user in the vehicle 30, or a device installed by being incorporated in the vehicle 30 (for example, a device incorporated as a part of a navigation device). May be good.

The UE 31 of the vehicle 30 is connected to the map server 10 via the base station 16 of the mobile communication network (cellular network) by the network communication method (for example, 3G, LTE, or next-generation NR method) which is the first communication method. Communication is possible. After the wireless section with the base station 16 transitions from the idle state to the connection state by the first communication method, the UE 31 transmits and receives various information to the map server 10 periodically (for example, periodically) or irregularly. be able to.

The information received by the UE 31 from the map server 10 includes, for example, map information in which L2IDs are associated (associated) with each management area for a plurality of management areas different from each other in the service target area.

The information transmitted from the UE 31 to the map server 10 includes, for example, position information indicating the current position of the vehicle 30 (UE 31) and communication information regarding data communication with another vehicle (UE). The position information indicating the current position of the vehicle 30 (UE 31) can be calculated based on, for example, the output (positioning result) of the GNSS (Global Navigation Satellite System) receiver as the current position acquisition means provided in the UE 31. Further, the UE 31 includes at least one of a GNSS receiver, a gyroscope, an acceleration sensor, a speed sensor, and a magnetic sensor as the current position acquisition means, and measures the current position of the vehicle 30 by the GNSS receiver based on the output thereof. Even when the accuracy is low, the movement path of the vehicle 30 (UE31) may be calculated to accurately estimate the current position of the vehicle 30 (UE31), or the posture or orientation of the vehicle 30 may be estimated. This estimation result may be included in the information transmitted to the map server 10.

The information transmitted from the UE 31 to the map server 10 may include the speed V3 of the vehicle 30 (UE31) and the vehicle identification information (vehicle ID). The speed V3 of the vehicle 30 can be obtained from, for example, the drive control device of the vehicle 30. The speed V3 of the vehicle 30 (UE 31) may be calculated based on the time change (movement distance and movement time) of the position information in the movement history information recorded in the UE 31. Here, the "speed" of the vehicle 30 is a vector quantity represented by the direction and speed (= absolute value of speed, magnitude) of the movement of the vehicle 30.

Further, the UE 31 of the vehicle 30 can perform wireless communication with another vehicle (hereinafter, also referred to as “vehicle-to-vehicle communication”) by a second communication method that does not go through a base station of a mobile communication network (cellular network). .. The second communication method is, for example, a Sidelink method using a PC-5 (hereinafter, also referred to as “PC5”) interface (hereinafter, also referred to as a “PC5 communication method” or a “PC-5 Sidelink method”). The PC-5 interface is a D2D (Device to Device) interface in which UEs, UEs and other devices (for example, vehicles), vehicles, or vehicles and other devices communicate directly without going through a base station. Yes, it has been standardized since 3GPP Release 12. In the PC5 communication method (Siderink method), UEs, UEs and other devices (for example, vehicles), vehicles, or vehicles and other devices are compared without using a base station by using a PC-5 interface or the like. It is a short-range wireless communication method that directly communicates in a small area.

In the PC5 communication method, the Layer-2 ID is a communication identifier (frame identifier) that identifies a frame (also referred to as a “MAC packet”) that is a data processing unit in the data link layer (Layer-2) of the layered communication model. (Hereinafter, abbreviated as "L2ID" as appropriate) is defined. The three-digit number illustrated in a frame behind the vehicle 30 in FIG. 1 is the L2ID value associated with the management area in which the vehicle 30 is located (see FIG. 2 described later).

FIG. 2 is an explanatory diagram showing an example of data communication between vehicles by the PC5 communication method according to the present embodiment. Below each of the plurality of vehicles 30 (1) to 30 (3) in FIG. 2, an example of the layered communication models 310 (1) to 310 (3) in the UEs 31 (1) to 31 (3) of each vehicle is used. Shown. In each layered communication model 310 (1) to 310 (3), from the bottom to the top, layer 1 (L1) composed of physical layers, MAC (media access control) layer and RLC (radio link control) layer Layer 2 (L2) that processes data in frame units by PDCP (packet data convergence) layer, network layer that processes data in packet units by using various protocols (for example, IP, Non-IP, ARP), application layer It is composed of. Data in the application layer is also called a "message".

In FIG. 2, the UE 31 (1) of the vehicle 30 (1), which is the first communication terminal device (communication terminal device on the transmitting side), uses, for example, a part of the uplink radio resource of mobile communication, and is layer 2 ( Data (message) is transmitted in frame units by designating a Terminal L2ID (hereinafter, appropriately abbreviated as "Dst. L2ID") which is a frame identifier as a communication identifier of a transmission destination (communication destination) in L2). In the example of FIG. 2, Dst. "Yyy" is specified as the L2ID. The UEs 31 (2) and 31 (3) of the receiving side vehicles 30 (2) and 30 (3), which are the second communication terminal devices (receiving side communication terminal devices), are the transmission destinations included in the header of the received frame. It is determined whether or not the frame identifier (Dst. L2ID) of the above matches the frame identifier (L2ID) assigned to the own device.

Further, in FIG. 2, in the UE 31 (2) of the vehicle 30 (2), the frame identifier (Dst. L2ID) of the transmission destination included in the header of the received frame: yyy is assigned to the frame identifier (L2ID) of the own device. ): It is determined that the data matches yyy, and the data is processed so as to raise the packet including the data (message) of the received frame to the upper layer, so that the data can be used for the application. On the other hand, in the UE 31 (3) of the vehicle 30 (3), the transmission destination frame identifier (Dst. L2ID): yyy included in the header of the received frame is changed to the frame identifier (L2ID): zzz assigned to the own device. By determining that they do not match and processing the packet containing the received frame data (message) so as not to raise it to the upper layer, the data cannot be used for the application.

However, as shown in FIG. 3A, the UE 31 (1) of the vehicle 30 (1) on the transmitting side is a transmission destination (communication destination) of the vehicle 30 (2) located in a specific management area in the vicinity. UE31 (2) Dst. I don't know the L2ID (yyy) information, so Dst. It may not be possible to transmit data with the L2ID specified. In this case, as shown in FIG. 3 (b), Dst. By transmitting the data as a broadcast without specifying the L2ID, it is conceivable that the data can be received and used by the UE 31 (2) of the vehicle 30 (2). However, since the data transmitted as a broadcast can be received and used by UEs 31 (3) to 31 (6) in the vicinity other than the UE 31 (2), only the UEs located in a specific management area in the vicinity can be used. It is difficult to use for sending data to.

Therefore, in the present embodiment, L2ID as a communication identifier is associated (linked) with each of a plurality of different management areas in the target area (service providing area). The UE 31 of the vehicle 30 on the transmitting side adds L2ID corresponding to a specific area (specific management area) of the data transmission destination located around the current position of the UE as a communication identifier (Dst.L2ID) of the transmission destination. Is transmitted by the PC5 communication method. Further, the UE 31 of the vehicle 30 on the receiving side determines whether or not the communication identifier of the transmission destination added to the data received by the PC5 communication method matches the L2ID corresponding to the management area including the current position of the own UE. Is judged, and if they match, the received data is raised to the upper layer and data processing is performed so that it can be used in the application. By selecting one of the plurality of L2IDs set in association with each management area of the target area (service providing area) and designating it as the communication identifier (Dst.L2ID) of the PC5 communication method, transmission is performed. The UE 31 of the vehicle 30 on the side can transmit data by designating the area where the UE 31 of the vehicle 30 on the receiving side is located by the PC5 communication method. Then, only the UE 31 of the receiving vehicle 30 located in the area can receive the data and use it for the application.

Further, in the present embodiment, the map information in which the L2ID is associated (associated) with each management area for a plurality of management areas different from each other in the service target area is stored and managed in the map server 10. The map server 10 functions as a database (DB) of map information, and newly sets or updates the correspondence between the map information management area and the L2ID based on the communication information and the position information received from the UE 31 of each vehicle 30. Or The UE 31 of each vehicle 30 transmits a request for map information to the map server 10 at an arbitrary timing, so that the L2ID is associated with each of the service area (management area) in which the UE is located and the surrounding management area. The latest (linked) map information can be downloaded and stored in the UE.

The association between the management area and the L2ID is such that the L2IDs do not overlap each other between the management areas within the PC-5 communication range (wireless communication range) capable of communicating with a predetermined reception strength by the PC5 communication method, for example. This is done so that duplication of L2ID is allowed between management areas that are sufficiently separated. As a result, it is possible to reliably specify a specific management area where the UE 31 of the vehicle 30 to which data is transmitted by the PC5 communication method is located, and it is possible to minimize the number of L2IDs used for the data transmission. .. The L2IDs may be associated so that the L2IDs of all the management areas in the target area (service providing area) are different from each other.

Further, in the present embodiment, different L2IDs may be associated with each other for each traveling direction of the vehicle 30 even in the same management area. In this case, the UE 31 of the vehicle 30 on the transmitting side specifies one of a plurality of different moving directions of the vehicles (UE) in the area where the UE 31 of the vehicle 30 on the receiving side is located by the PC5 communication method. The data can be transmitted so that the data can be used only by the UE 31 of the vehicle 30 moving in the specified direction in the area.

FIG. 4 is an explanatory diagram showing an example of associating the management area and the L2ID in the map information managed by the map server 10 according to the present embodiment. The example of FIG. 4 is an example in which the target area (service providing area) is a road 90 as a movable movement route of the vehicle 30. The numbers entered in each management area of the road 90 in FIG. 4 are the values of L2ID associated with the management area.

In FIG. 4, the target area constitutes each of a plurality of management areas A101, A102, and A103 that constitute an area of a road extending in the left-right direction in the figure, and an area of two roads extending in the vertical direction in the figure. It has management areas A201, A202, A211 and A212, and management areas A301 and A302 that form an area at a road intersection. L2IDs are associated with each of a plurality of different management areas constituting the target area for each management area and each vehicle traveling direction. For example, in the management area A101 extending in the left-right direction in the figure, "001" is associated with the L2ID in the right direction, and "002" is associated with the L2ID in the left direction. Further, in the management area A201 extending in the vertical direction in the drawing, "003" is associated with the L2ID in the upward direction, and "003" is associated with the L2ID in the downward direction. Further, "101" and "102" are associated with the management areas A301 and A302 of the intersection as L2IDs regardless of the direction, respectively.

FIG. 5 is a block diagram showing an example of a main configuration of the UE 31 of the vehicle 30 according to the present embodiment. In FIG. 5, the UE 31 includes a map information acquisition unit (map information acquisition means) 311 and a position information acquisition unit (position information acquisition means) 312, and an information storage unit (information storage means) 313.

The map information acquisition unit 311 receives (associates) map information in which L2IDs are associated with each management area for a plurality of management areas different from each other in the above-mentioned service target area from the map server 10 and acquires the map information. For example, the location information acquisition unit 312 uses a network communication system (for example, a next-generation NR system such as 3G system, LTE system, 5G, etc.) and uses a wireless resource assigned to the UE 31 to perform a mobile communication network (cellular). By wirelessly communicating with the base station 16 of the network) 15, the map server 10 is accessed and map information is downloaded.

The position information acquisition unit 312 acquires the position information of the current position of the UE 31 of the own vehicle 30 by the above-mentioned GNSS receiver or the like.

The information storage unit 313 stores the map information acquired from the map server 10 by the map information acquisition unit 311 and the position information of the current position of the UE 31 of the own vehicle 30 acquired by the position information acquisition unit 312.

Further, the UE 31 includes an identifier acquisition unit (identifier acquisition means) 314, an identifier selection unit (identifier selection means) 315, and a data transmission unit (data transmission means) 316.

Further, when the identifier acquisition unit 314 transmits data to the UE or the like of a surrounding vehicle, the identifier acquisition unit 314 refers to the map information stored in the information storage unit 313 and manages a plurality of managements around the current position of the UE 31 of the own vehicle 30. Acquire a plurality of L2IDs corresponding to the area. Further, when the identifier acquisition unit 314 receives data from the UE or the like of a surrounding vehicle, the identifier acquisition unit 314 refers to the map information stored in the information storage unit 313 and has a management area including the current position of the UE 31 of the own vehicle 30. Acquire the L2ID corresponding to the area).

When the identifier selection unit 315 transmits data to the UE or the like of a surrounding vehicle, the identifier selection unit 315 obtains an L2ID corresponding to a specific management area (data transmission target area) from a plurality of communication identifiers acquired by the identifier acquisition unit 314. Select as L2ID. In addition, the identifier selection unit 315 Dsts the L2ID corresponding to a specific management area (area to be data transmission) according to at least one of the type of communication service accompanied by data transmission by the PC5 communication method and the purpose of communication. .. It may be selected as L2ID. In this case, data can be transmitted by designating a different area for each type of communication service that involves data transmission by the PC5 communication method, for each purpose of the communication, or for each combination of the type and use. it can.

The data transmission unit 316 sets the L2ID corresponding to the specific management area of the data transmission target to Dst. A frame containing data added as an L2ID (communication identifier of a destination) is transmitted by the PC5 communication method.

Further, the UE 31 includes a data receiving unit (data receiving means) 317 and a data processing unit (data processing means) 318. The data receiving unit 317 receives a frame containing data from the UEs of surrounding vehicles by the PC5 communication method.

The data processing unit 318 displays the data received by the data receiving unit 317 with Dst. Data processing that enables the application to use the received data when the destination L2ID added as the L2ID matches the L2ID corresponding to the management area including the current position of the own vehicle 30 (UE31). I do.

In addition, the UE 31 includes an information transmission unit (information transmission means) 319 that transmits various information to the map server 10. For example, when the information transmission unit 319 transmits data by the data transmission unit 316, the current position of the own vehicle 30 (UE31), the data transmission power, and the management area where the own vehicle 30 (UE31) is located Information including the corresponding L2ID is transmitted to the map server 10. Further, when the data receiving unit 317 receives the data, the information transmitting unit 319 sets the current position of the own vehicle 30 (UE31), the received power of the data, and the communication identifier of the transmitting side included in the received data. The included information is transmitted to the map server 10.

FIG. 6 is a block diagram showing an example of the main configuration of the map server 10 according to the present embodiment. In FIG. 6, the map server 10 includes a map information storage unit (storage means) 101, a request reception unit (request reception means) 102, a map information transmission unit (map information transmission means) 103, and a vehicle (UE) information reception. A unit (information receiving means) 104 and a map information setting / updating unit (information processing means) 105 are provided.

The map information storage unit 101 uses the PC5 communication method of the communication terminal device 31 for communication destinations of a plurality of different management areas constituting a target area (service providing area to the user) to which the communication terminal device 31 of the vehicle 30 can move. The map information in which the L2ID used for designating is associated with each management area is stored.

The request receiving unit 102 receives a map information request including the position information of the current position of the UE 31 (vehicle 30) from the UE 31.

Based on the map information request received from the UE 31 of the vehicle 30, the map information transmission unit 103 has the L2ID corresponding to the management area (area in the service area) including the current position of the UE 31 (vehicle 30) and the UE 31 (vehicle 30). Map information including the L2ID corresponding to one or more management areas in the vicinity is transmitted to the UE 31 of the vehicle 30.

The vehicle (UE) information receiving unit 104 receives data from the UE 31 of the transmitting side vehicle 30 that has transmitted data by the PC5 communication method, the current position of the transmitting side UE 31 (vehicle 30), the transmission power, and the transmitting side UE 31. Receives information including a Source L2ID (hereinafter referred to as "Src.L2ID") which is an L2ID. Further, the vehicle (UE) information receiving unit 104 receives data from the UE 31 of the receiving side vehicle 30 that has received data by the PC5 communication method, the current position of the receiving side UE 31 (vehicle 30), the received power, and the transmitting side. UE31 Src. Receives information including L2ID.

The map information setting / updating unit 105 receives radio waves by the PC5 communication method at a predetermined reception power so as to be able to respond to changes in the environment of the radio wave propagation path of the PC5 communication method (for example, new construction of a building that becomes an obstacle to the propagation of radio waves). Based on the information on the radio communication possible distance that can be received by, the L2ID is set in association with each management area.

For example, the map information setting / updating unit 105 sets different L2IDs for a plurality of management areas that are separated from each other by an area distance equal to or less than the wireless communication possible distance, and is between areas longer than the wireless communication possible distance. A plurality of management areas that are separated from each other by a distance are processed so as to allow the same L2ID setting. In this case, it is possible to reliably specify a specific management area where the UE 31 of the vehicle 30 to which the data is transmitted by the PC5 communication method is located, and it is possible to minimize the number of L2IDs used for the data transmission. ..

The map information setting / updating unit 105 receives information centered on the position of the UE 31 (vehicle 30) on the transmitting side based on the information received from the UE 31 of the vehicle 30 on the transmitting side and the UE 31 of the vehicle 30 on the receiving side. The distribution of power and propagation loss may be calculated to estimate the wireless communication distance. In this case, it is possible to acquire the latest information on the environmental change of the wireless propagation path of the PC5 communication method and set and update the correspondence for each management area of the L2ID. Further, since the information received from each of the UE 31 of the transmitting side vehicle 30 and the UE 31 of the receiving side vehicle 30 that have transmitted and received data is used to acquire the latest information on the environmental change of the radio propagation path, the radio propagation path There is no need to perform a separate process to obtain the latest information on environmental changes.

FIG. 7 is a flowchart showing an example of a data communication procedure by the PC5 communication method in the UE 31 of the vehicle 30 on the receiving side according to the present embodiment.
In FIG. 7, the UE 31 of the vehicle 30 on the receiving side downloads the above-mentioned map information from the map server 10 via the base station 16 periodically (for example, periodically) or irregularly at a predetermined timing (for example). S101). The map information may be downloaded from the map server 10 at the timing when the map information is updated, for example.

Next, the UE 31 on the receiving side executes positioning processing periodically (for example, periodically) or irregularly at a predetermined timing to acquire the current position of its own UE 31, and refers to the map information to obtain the current position. Acquire the L2ID of the service area (management area) including the current position of the own UE 31 (S102, S103). The current position of the own UE 31 and the L2ID may be acquired, for example, at a timing when the mileage of the vehicle 30 (UE31) from the previous acquisition becomes longer than the preset reference distance.

Next, when the receiving UE 31 receives a frame including data transmitted from a surrounding vehicle (UE) by the PC5 communication method, whether the frame (data) is added to the frame (data) or the L2ID is in the service area of the own UE 31. It is determined whether or not the L2ID corresponds to the area (management area), that is, whether or not the data addressed to the own UE has been received (S104).

When receiving a frame containing data addressed to its own UE, the receiving UE 31 passes the data contained in the receiving frame to the application layer, which is the upper layer in the layered communication model, so that the data can be used by the application (S105). ).

FIG. 8 is a flowchart showing an example of a data communication procedure by the PC5 communication method in the UE 31 of the vehicle 30 on the transmitting side according to the present embodiment.
In FIG. 8, the UE 31 of the vehicle 30 on the transmitting side downloads the above-mentioned map information from the map server 10 via the base station 16 periodically (for example, periodically) or irregularly at a predetermined timing (for example). S201). The map information may be downloaded from the map server 10 at the timing when the map information is updated, for example.

Next, the UE 31 on the transmitting side executes positioning processing periodically (for example, periodically) or irregularly at a predetermined timing to acquire the current position of the own UE 31, refers to the map information, and performs the positioning process. The L2ID of the service area (management area) including the current position of the own UE 31 and the L2ID of one or more management areas around the current position are acquired (S202, S203). The acquisition of the current position and L2ID of the own UE 31 may be performed, for example, at the timing when the mileage of the vehicle 30 (UE 31) from the previous acquisition becomes longer than the preset reference distance, or at the timing before data transmission. ..

Next, the UE 31 on the transmitting side identifies the target vehicle to which data is to be transmitted and the surrounding area where the target vehicle is predicted to be located, according to the type of service for transmitting data to surrounding vehicles (UE) by the PC5 communication method. Select an area (management area) (S204).

Next, the UE 31 on the transmitting side sets the L2ID corresponding to the above-selected specific area (management area) to Dst. It is additionally specified as L2ID (communication identifier of the destination), and its Dst. A frame containing data for which L2ID is specified is transmitted to the periphery by the PC5 communication method (S205).

In particular, according to the example of the data communication procedure of FIG. 8, the Dst. Corresponding to the specific area (management area) selected according to the type of service. By specifying the L2ID (communication identifier of the destination), the data can be transmitted by changing the destination area of the PC5 communication method according to the service.

FIG. 9 is an explanatory diagram showing an example of data transmission by the PC5 communication method from the UE 31 (1) of the vehicle 30 (1) whose hazard has stopped in the communication system according to the present embodiment.
In FIG. 9, the UE of the vehicle 30 (1) whose hazard has stopped is Dst. As the L2ID (communication identifier of the destination), the L2ID (= 001) associated with the direction approaching the vehicle 30 (1) in the management area A101, which is the rear area of the vehicle 30 (1) (right direction in the figure) is specified. Then, data (frame) including warning information indicating that the vehicle is stopped due to a hazard is transmitted. In this case, the UE of the vehicle 30 (1) can output and convey the above-mentioned warning information only to the vehicle 30 (2) in the rear area approaching the own vehicle, and other vehicles that do not need the above-mentioned warning. It is possible to avoid the information output of the above-mentioned alert in the vehicles 30 (3) to 30.

Further, FIG. 10A is an explanatory diagram showing an example of beam formation at the time of data transmission by the PC5 communication method in the communication system according to the embodiment. In FIG. 10A, the UE of the vehicle 30 (1) is Dst. As the L2ID (communication identifier of the destination), specify the L2ID (= 007) corresponding to the same direction as the own vehicle (right direction in the figure) in the service area (management area) where the own vehicle is located, and use the PC5 communication method. Data (frames) are transmitted forward and backward. In this case, the vehicles 30 (2) and 30 (3) traveling in the same direction as the own vehicle in the service area (management area) without narrowing the beam widths of the front and rear data transmission beams 310f and 310b. Information can be transmitted only to the vehicle, and information transmission to the vehicle 30 (4) traveling in the opposite lane in the opposite direction can be avoided. Therefore, the beam width of the PC5 communication type antenna can be relaxed, and a small antenna can be mounted at low cost.

On the other hand, Dst. Of FIG. 10 (b). In the case of a comparative example in which L2ID (communication identifier of the destination) is not specified for broadcasting, in order to convey information only to the vehicles 30 (2) and 30 (3) traveling in the same direction as the own vehicle, data transmission is performed. Since it is necessary to narrow the beam widths of the beams 310f and 310b, it is difficult to reduce the cost and size of the PC5 communication type antenna.

FIG. 11 is an explanatory diagram showing an example of data transmission from the UE of the vehicle 30 (2) traveling on the one-way road 99 in the communication system according to the present embodiment by the PC5 communication method. In FIG. 11, a normal L2ID (= 007) is associated (assigned) with the correct direction (right direction in the figure) of the area of the one-way road 99. On the other hand, L2ID (= 901), which has a high communication priority, is associated (assigned) with the reverse direction (left direction in the figure) of the area of the one-way road 99.

The UE of the vehicle 30 (1) traveling on the one-way road 99 in the correct direction (right direction in the figure) recognizes the traveling direction of the own vehicle, for example, by changing the position information of the own vehicle, and Dst. As L2ID (communication identifier of the destination), L2ID (= 901) having a high priority of communication associated with the reverse direction (left direction in the figure) of the area of the one-way road 99 is specified, and A high priority value (= 1) is set as the value of the communication priority parameter (for example, SL-Priority-r13), and the warning information data is transmitted by the PC5 communication method. In this case, the warning information for warning that the vehicle is traveling in the reverse direction can be transmitted and output preferentially only to the vehicle 30 (2) that is traveling in the reverse direction.

The UE of the vehicle 30 (2) traveling in the reverse direction on the one-way road 99 recognizes the traveling direction of the own vehicle, for example, by changing the position information of the own vehicle, and Dst. As the L2ID (communication identifier of the destination), the L2ID (= 007) associated with the correct direction (right direction in the figure) of the area of the one-way road 99 is specified, and the communication priority parameter (for example, the communication priority parameter) is specified. , SL-Priority-r13) is set to a high priority value (= 1), and warning information data is transmitted by the PC5 communication method. In this case, warning information for warning the existence of a vehicle traveling in the opposite direction is transmitted preferentially only to the vehicle 30 (1) traveling on the one-way road 99 in the correct direction (to the right in the figure). It can be output.

Next, the setting and updating of the association between each management area and the L2ID in the communication system according to the present embodiment will be described.
12 and 13 are explanatory views showing an example of mapping in which the management area and L2ID are associated with each other before and after the road is newly constructed in the map server 10 according to the present embodiment, respectively.
The management area A102 to the right of the intersection of the T-junction of the road 90 before the new road construction in FIG. 12 has no road intersection and has different L2IDs (005 and 006) in each of the two opposite directions. Assigned.

In FIG. 13, when the road 96 is newly constructed to form a T-junction, new L2IDs (007 and 008) different from each other in the two directions upside down in the management area A211 of the newly constructed road 96 are generated. Assigned. Further, a new L2ID (102) is assigned to the management area A302 of the newly formed intersection of the T-junction, and the newly defined management area A103 on the right side of the intersection has two directions opposite to each other. New L2IDs (009 and 010) that are different from each other are assigned to.

As illustrated in FIGS. 12 and 13, when a new road is constructed, it is necessary to newly set and update the management area and L2ID. However, road conditions such as road construction may change depending on the time, and new setting and updating of the management area and L2ID become complicated. In addition, in order to minimize the value that can be assigned as the L2ID associated with the management area, there is a request that the same value be used as the L2ID as much as possible in consideration of the communicable distance of the PC5 communication method.

Therefore, in the present embodiment, the communication information including the received power in the PC-5 communication method in which the data can be received by each vehicle 30 (UE31) and the L2ID (Src.L2ID) of the transmission source is transmitted to each vehicle 30 (UE31). Along with the position information, it is uploaded to the map server 10 and aggregated, and the radio wave propagation loss is calculated by collating it with the position information and transmission power uploaded from the vehicle 30 (UE31) of the data transmission source, and the radio wave propagation loss is calculated. Based on this, the wireless communication range (wireless communication range) of the PC5 communication method in each management area is obtained, and the L2ID is mapped to each management area.

FIG. 14 is an explanatory diagram showing an example of uploading communication information and location information from the UE of the vehicle according to the embodiment to the map server 10. In FIG. 14, the UE of the transmitting vehicle 30 (1) that transmitted data by the PC-5 communication method is the transmitting side Src corresponding to the area (management area) of the own vehicle. The communication information including the L2ID and the transmission power and the position information of the own vehicle are transmitted to the map server 10 via the base station 16. The UE of the vehicle 30 (1) on the transmitting side may add the position information of the own vehicle to the data when transmitting the data by the PC-5 communication method.

The UEs of the receiving vehicles 30 (2) and 30 (3) that could receive the data from the UE of the transmitting vehicle 30 (1) are the transmitting Src. The communication information including the L2ID and the received power and the position information of the own vehicle are transmitted to the map server 10 via the base station 16. If the position information of the UE on the transmitting side is added to the data by the PC-5 communication method received from the UE of the vehicle 30 (1) on the transmitting side, the position information of the UE on the transmitting side is also included. It may be transmitted to the map server 10.

The UE of the receiving vehicle 30 (4), which could not receive the data from the UE of the transmitting vehicle 30 (1), transmits only the position information of the own vehicle to the map server 10 via the base station 16. ..

FIG. 15 is an explanatory diagram showing an example of mapping between the calculation result of the propagation loss and the L2ID in the map server 10 that has received the upload of the information of FIG. “○” in the graph shown in the lower part of FIG. 15 indicates radio wave propagation at the UE positions of a plurality of vehicles on the data receiving side with reference to the UE positions of the vehicle 30 (1) of the data transmission source. This is an example of the loss calculation result. The distance (range) in which the approximate curve of the calculation result of the propagation loss is equal to or less than a predetermined threshold value Th is the wireless communication possible distance (range) R of the PC5 communication method. Since the management area A103 at the right end of the road 90 in FIG. 15 is located outside the wireless communication possible distance (range) R, the same L2ID (= 001,002) as the management area A101 at the left end of the road 90 is assigned. ing.

FIG. 16 is an explanatory diagram showing an example of uploading communication information and location information from the UE of the vehicles 30 (1) and 30 (2) to the map server 10 in one-sided traffic due to road construction according to the present embodiment. In FIG. 16, the UE of the vehicle 30 (1) on the transmitting side by the PC-5 communication method passing through the one-sided traffic area is the transmission source Src corresponding to the service area (management area) of the own vehicle. The communication information including the L2ID and the transmission power and the position information of the own vehicle are transmitted to the map server 10 via the base station 16. On the other hand, the UE of the receiving side vehicle 30 (2), which stopped before the one-sided traffic area and was able to receive the data from the UE of the transmitting side vehicle 30 (1), is the transmitting side added to the data. Src. The communication information including the L2ID and the received power and the position information of the own vehicle are transmitted to the map server 10 via the base station 16. The map server 10 can temporarily detect that the area A401 in the figure is tentatively one-sided from the changes in the communication information and the position information received from the UEs of the vehicles 30 (1) and 30 (2). , The area A401 is defined as a provisional management area, and L2ID (= 901) having a high communication priority is provisionally assigned. Due to the allocation of L2ID (= 901), which has a high priority for communication, the UE of the vehicle 30 (1) passing through the one-sided traffic area displays data including the alert information in front of the one-sided traffic area. It is possible to stop and have the UE of the vehicle 30 (1) on the transmitting side preferentially receive the information and output the alert information preferentially.

FIG. 17 is a flowchart showing an example of an information upload procedure at the time of data reception by the PC5 communication method in the UE of the receiving vehicle according to the present embodiment. In FIG. 17, when the UE 31 of the vehicle 30 on the receiving side receives the data by the PC5 communication method (S301), the transmission source Src. The L2ID and the location information of the transmission source are extracted (S302). Next, the UE 31 of the vehicle 30 on the receiving side performs positioning to measure the current position of the UE of the own vehicle (S303), and the transmission source Src. Communication information including L2ID and received power, source position information, and own UE position information are transmitted to the map server 10 via the base station 16 (S304).

FIG. 18 is a flowchart showing an example of an information upload procedure at the time of data transmission by the PC5 communication method in the UE of the receiving vehicle according to the present embodiment. In FIG. 18, the UE 31 of the vehicle 30 on the transmitting side transmits data by the PC5 communication method (S401), performs positioning to measure the current position of the UE of the own vehicle (S402), and Src. The communication information including the L2ID and the transmission power and the location information of the transmission source are transmitted to the map server 10 via the base station 16 (S403).

FIG. 19 is a flowchart showing an example of the L2ID mapping procedure in the map server 10 according to the present embodiment. In FIG. 19, the map server 10 receives communication information and position information from the UE of the transmitting vehicle and the UEs of a plurality of receiving vehicles that have transmitted and received data by the PC5 communication method (S501). The communication information received from the UE of the vehicle on the transmitting side is the Src. Includes L2ID and transmission power. The communication information received from the UE of the vehicle on the receiving side is the transmission information of Src. Includes L2ID and received power.

Next, the map server 10 uses the PC5 communication method in the UE of each receiving side vehicle based on the transmission power received from the UE of the transmitting vehicle and the received power received from the UEs of the plurality of receiving side vehicles. (S502), and from the distribution of the propagation loss, a two-dimensional range of the wireless communication range that enables data transmission / reception by the PC5 communication method centered on the position of the UE of the vehicle on the transmitting side. The PC5 communicable range (wireless communicable range) is calculated (S503).

Next, the map server 10 performs L2ID mapping (new setting or update) based on the PC5 communicable range (S504).

As described above, according to the present embodiment, a plurality of Layer-2 IDs (L2IDs) associated with each management area for a plurality of management areas different from each other constituting a target area in which the UE 31 incorporated in the vehicle 30 can move. By selecting one of them and specifying it as the communication identifier (Dst. L2ID) of the transmission destination of the PC5 communication method, the UE 31 of the transmitting vehicle 30 is positioned by the PC5 communication method and the UE 31 of the receiving vehicle 30 is located. Data can be sent by specifying the area in which it is located.
In addition, PC-5 communication is performed using only the data link layer (Layer-2) in the layered communication model of the next-generation 3GPP standard specifications such as LTE or 5th generation (NR) (without being aware of the application layer). The destination area of the method can be limited.
In addition, the processing of unnecessary data in the application layer can be reduced, and the requirements of the application can be relaxed.
Further, the requirement of the antenna directional beam of the PC5 communication method can be relaxed, and the antenna of the PC5 communication can be miniaturized and the cost can be reduced.

Further, according to the present embodiment, the UE of the transmitting vehicle can specify the area where the UE of the receiving vehicle is located by the PC5 communication method and transmit the data, and the area designation is included. Map information used for data transmission can be collectively managed and provided to each UE.
Further, the mapping of Layer-2 ID (L2ID) as the communication identifier of the PC5 communication method can be autonomously performed.

The processing process described in this specification and the components of the communication terminal device (UE), the base station, the server, the MEC device, and the communication system (collision risk notification system) can be implemented by various means. For example, these steps and components may be implemented in hardware, firmware, software, or a combination thereof.

Regarding hardware implementation, means such as a processing unit used to realize the above steps and components in an entity (for example, various wireless communication devices, eNodeBs, terminals, hard disk drive devices, or optical disk drive devices) One or more application-specific ICs (ASICs), digital signal processors (DSPs), digital signal processors (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors , Controllers, microcontrollers, microprocessors, electronic devices, other electronic units designed to perform the functions described herein, computers, or combinations thereof.

Further, for firmware and / or software implementation, means such as a processing unit used to realize the above components are programs (for example, procedures, functions, modules, instructions) that execute the functions described in the present specification. , Etc.) may be implemented. In general, any computer / processor readable medium that clearly embodies the firmware and / or software code is a means such as a processing unit used to implement the steps and components described herein. May be used to implement. For example, the firmware and / or software code may be stored in memory and executed by a computer or processor, for example, in a control device. The memory may be implemented inside the computer or processor, or may be implemented outside the processor. Further, the firmware and / or software code may be, for example, a random access memory (RAM), a read-only memory (ROM), a non-volatile random access memory (NVRAM), a programmable read-only memory (PROM), or an electrically erasable PROM (EEPROM). ), FLASH memory, floppy (registered trademark) discs, compact discs (CDs), digital versatile discs (DVDs), magnetic or optical data storage devices, etc., even if they are stored on a computer- or processor-readable medium. Good. The code may be executed by one or more computers or processors, or the computers or processors may be made to perform the functional embodiments described herein.

Further, the medium may be a non-temporary recording medium. Also, the code of the program may be read and executed by a computer, processor, or other device or device machine, the format of which is not limited to a particular format. For example, the code of the program may be any of source code, object code, and binary code, or may be a mixture of two or more of these codes.

Also, the description of the embodiments disclosed herein is provided to allow one of ordinary skill in the art to manufacture or use the disclosure. Various amendments to this disclosure will be readily apparent to those of skill in the art and the general principles defined herein are applicable to other variations without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be accepted in the broadest range consistent with the principles and novel features disclosed herein.

10: Map server 15: Mobile communication network 16: Base station 30: Vehicle 31: Communication terminal device (UE)
90: Road 96: Road 99: One-way road 101: Map information storage unit 102: Request reception unit 103: Map information transmission unit 104: Information reception unit 105: Update unit 310: Hierarchical communication model 310b: Beam 310f: Beam 311 : Map information acquisition unit 312: Position information acquisition unit 313: Information storage unit 314: Identifier acquisition unit 315: Identifier selection unit 316: Data transmission unit 317: Data reception unit 318: Data processing unit 319: Information transmission unit

Claims (21)

A communication system including a first communication terminal device and a second communication terminal device capable of communicating with each other by a direct wireless communication method.
The first communication terminal device adds data to which a communication identifier corresponding to a specific management area selected from a plurality of different management areas constituting a target area to which the communication terminal device can move is added as a transmission destination communication identifier. , Transmit by the direct wireless communication method
In the second communication terminal device, the communication identifier of the transmission destination added to the data received by the direct wireless communication method becomes the communication identifier corresponding to the management area including the current position of the second communication terminal device. A communication system characterized in that, when there is a match, the received data is made available to the application. In the communication system of claim 1,
The first communication terminal device is
A map information acquisition means for acquiring map information in which a communication identifier is associated with each management area for a plurality of different management areas constituting a target area to which the communication terminal device can move.
A position information acquisition means for acquiring the position information of the current position of the first communication terminal device, and
An identifier selection means that refers to the map information, acquires a plurality of communication identifiers corresponding to a plurality of management areas around the current position, and selects a communication identifier corresponding to the specific management area from the plurality of communication identifiers. When,
A communication system including a data transmission means for directly transmitting data to which a communication identifier corresponding to the specific management area is added as a communication identifier of a transmission destination by a wireless communication method. In the communication system of claim 2,
The identifier selection means is a communication system characterized in that a communication identifier corresponding to the specific management area is selected according to at least one of a communication service type and a communication application. In the communication system according to any one of claims 1 to 3,
The second communication terminal device is
A map information acquisition means for acquiring map information in which a communication identifier is associated with each management area for a plurality of different management areas constituting a target area to which the communication terminal device can move.
A position information acquisition means for acquiring the position information of the current position of the second communication terminal device, and
An identifier acquisition means for acquiring a communication identifier corresponding to a management area including the current position of the second communication terminal device by referring to the map information.
A data receiving means for receiving data by the direct wireless communication method and
When the communication identifier of the transmission destination added to the received data matches the communication identifier corresponding to the management area including the current position of the second communication terminal device, the received data is used by the application. A communication system comprising a data processing means that enables it to be used. In the communication system according to any one of claims 2 to 4.
Further, a server for storing map information associated with the communication identifier for each management area for a plurality of management areas different from each other constituting a target area to which the communication terminal device can move is provided.
A communication system characterized in that the first communication terminal device and the second communication terminal device each receive and acquire the map information from the server. In the communication system according to any one of claims 1 to 5.
The first communication terminal device transmits data to which a communication identifier corresponding to the specific management area and identification information of a communication priority are added by the direct wireless communication method.
When the second communication terminal device receives a plurality of data in which a communication identifier corresponding to a management area including the current position of the second communication terminal device is added as a communication identifier of the transmission destination, the plurality of data A communication system characterized in that, based on the priority identification information added to each, data having a high priority can be preferentially used in an application. In the communication system according to any one of claims 1 to 5.
A plurality of communication identifiers having different communication priorities are associated with each of a plurality of management areas different from each other constituting a target area in which the communication terminal device can move.
The first communication terminal device transmits data including a communication identifier selected from the plurality of communication identifiers according to the priority of communication by the direct wireless communication method.
When the second communication terminal device receives a plurality of data in which any one of the plurality of communication identifiers corresponding to the management area including the current position of the second communication terminal device is added as the communication identifier of the transmission destination. , A communication system characterized in that, based on the communication identifier attached to each of the plurality of data, data having a high priority can be preferentially used in an application. In the communication system according to any one of claims 1 to 7.
Each of a plurality of different management areas constituting a target area to which the communication terminal device can move is associated with a plurality of communication identifiers in which the moving directions of the communication terminal devices in the area are different from each other. Communications system. It is a communication terminal device that can communicate directly by wireless communication method.
A map information acquisition means for acquiring map information in which a communication identifier is associated with each management area for a plurality of different management areas constituting a target area to which the communication terminal device can move.
A position information acquisition means for acquiring the position information of the current position of the communication terminal device, and
With reference to the map information, a plurality of communication identifiers corresponding to a plurality of management areas around the current position are acquired, and from the plurality of communication identifiers, specific management located around the current position of the communication terminal device is performed. An identifier selection means for selecting a communication identifier corresponding to an area, and
A communication terminal device comprising: a data transmission means for directly transmitting data in which a communication identifier corresponding to the specific management area is added as a communication identifier of a transmission destination by a wireless communication method. In the communication terminal device of claim 9,
The identifier selection means is a communication terminal device that selects a communication identifier corresponding to the specific management area according to at least one of a communication service type and a communication application. In the communication terminal device of claim 9 or 10.
An identifier acquisition means for acquiring a communication identifier corresponding to a management area including the current position of the communication terminal device by referring to the map information.
The communication identifier of the data receiving means for receiving data by the direct wireless communication method and the communication identifier of the destination added to the received data match the communication identifier corresponding to the management area including the current position of the communication terminal device. A communication terminal device further comprising a data processing means for enabling the received data in an application when the data is received. It is a communication terminal device that can communicate directly by wireless communication method.
A map information acquisition means for acquiring map information in which a communication identifier is associated with each management area for a plurality of different management areas constituting a target area to which the communication terminal device can move.
A position information acquisition means for acquiring the position information of the current position of the communication terminal device, and
An identifier acquisition means for acquiring a communication identifier corresponding to a management area including the current position of the communication terminal device by referring to the map information.
A data receiving means for receiving data by the direct wireless communication method and
When the communication identifier of the destination added to the received data matches the communication identifier corresponding to the management area including the current position of the communication terminal device, the received data can be used in the application. A communication terminal device comprising, and a data processing means for performing. In the communication terminal device according to any one of claims 9 to 12,
Receiving and acquiring the map information from a map server that stores map information associated with a communication identifier for each management area for a plurality of different management areas constituting a target area to which the communication terminal device can move. A communication terminal device characterized by. In the communication terminal device according to any one of claims 9 to 13.
The data to which the communication identifier and the identification information of the communication priority are added is transmitted by the direct wireless communication method.
When a plurality of data in which a communication identifier corresponding to a management area including the current position of the communication terminal device is added as a communication identifier of the destination is received, the priority identification information added to each of the plurality of data is received. A communication terminal device characterized in that high-priority data is preferentially made available to an application based on the above. In the communication terminal device according to any one of claims 9 to 14.
A plurality of communication identifiers having different communication priorities are associated with each of a plurality of management areas different from each other constituting a target area in which the communication terminal device can move.
Data including a communication identifier selected from the plurality of communication identifiers according to the priority of communication is transmitted by the direct wireless communication method.
When a plurality of data in which any one of the plurality of communication identifiers corresponding to the management area including the current position of the communication terminal device is added as the communication identifier of the destination is received, the said data added to each of the plurality of data. A communication terminal device characterized in that high-priority data is preferentially made available to an application based on a communication identifier. In the communication terminal device according to any one of claims 9 to 15.
Each of a plurality of management areas different from each other constituting a target area to which the communication terminal device can move is associated with a plurality of communication identifiers in which the movement directions of the communication terminal devices in the area are different from each other. Communication terminal device. In the communication terminal device according to any one of claims 9 to 16.
The direct wireless communication method is a direct wireless communication method using the PC5 interface included in the standard specifications of 3GPP.
The communication terminal device is characterized in that the communication identifier is an identifier of a frame containing the data in the data link layer of the layered communication model. A mobile body including the communication terminal device according to any one of claims 9 to 17. It is a communication method between a plurality of communication terminal devices by a direct wireless communication method.
The data to which the first communication terminal device adds a communication identifier corresponding to a specific management area located around the current position of the first communication terminal device as a transmission destination communication identifier is added by the direct wireless communication method. To send and
The communication identifier of the destination added to the data received by the second communication terminal device by the direct wireless communication method is one of the communication identifiers corresponding to the management area including the current position of the second communication terminal device. A communication method comprising making the received data available to an application when the data is received. A program executed by a computer or processor provided in a communication terminal device capable of communicating by a direct wireless communication method.
A program code for acquiring map information associated with a communication identifier for each management area for a plurality of management areas that are different from each other and constitute a target area to which the communication terminal device can move.
The program code for acquiring the position information of the current position of the communication terminal device,
With reference to the map information, a program code for acquiring a plurality of communication identifiers corresponding to a plurality of management areas around the current position, and
A program code for selecting a communication identifier corresponding to a specific management area located around the current position of the communication terminal device from the plurality of communication identifiers, and
A program code for directly transmitting data in which a communication identifier corresponding to the specific management area is added as a transmission destination communication identifier by a direct wireless communication method, and
A program characterized by including. A program executed by a computer or processor provided in a communication terminal device capable of communicating by a direct wireless communication method.
A program code for acquiring map information associated with a communication identifier for each management area for a plurality of management areas that are different from each other and constitute a target area to which the communication terminal device can move.
The program code for acquiring the position information of the current position of the communication terminal device,
With reference to the map information, a program code for acquiring a communication identifier corresponding to a management area including the current position of the communication terminal device, and
The program code for receiving data by the direct wireless communication method and
When the communication identifier of the transmission destination added to the received data matches the communication identifier corresponding to the management area including the current position of the communication terminal device, the received data can be used in the application. A program characterized by containing, and program code for.