JP2014192561A - Communication system and communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication system and a communication method that can appropriately exchange data even if a communication state changes between a mobile object and an external device that are exchanging the data.SOLUTION: A communication system communicates a group of data including multiple types of vehicle data between an on-vehicle communication device 21 mounted on a vehicle and a first service server outside the vehicle via a communication line. The communication system comprises: a transmission time calculation unit 228 that calculates the transmission rate of the communication line on the basis of the transmission state of the vehicle data via the communication line; a data editing unit 222 that adjusts the amounts of the respective pieces of vehicle data forming the data group to the amounts of data corresponding to the calculated transmission rate respectively, and generates a communication object data group on the basis of the data with the adjusted amounts of data; and a data transmission unit 227 that transmits the data group generated by the data editing unit 222 via the communication line.

Description

  The present invention relates to a communication system and a communication method for transmitting data between a moving body such as an automobile and an external device outside the moving body.

  As is well known, vehicles such as automobiles that are moving bodies include electronic control units (ECUs) that electronically control various in-vehicle devices such as engines and brakes, and devices such as meters that display various vehicle states. Many ECUs such as an ECU for controlling and an ECU constituting a navigation system are mounted. In the vehicle, the vehicle data possessed by each ECU is shared between the ECUs through communication performed via the in-vehicle network.

  Further, by providing vehicle data held by the ECU to an external device via an external network or the like, the demand for the vehicle itself to receive various services from the external device is increasing. An example of a system that provides vehicle data from a vehicle to an external device via a network is described in Patent Document 1.

  The system described in Patent Literature 1 is provided in a vehicle and communicates with a first communication terminal device that communicates with the first communication terminal device in a short-range wireless communication method. And a second communication terminal device that communicates with an external device (information center) via an Internet line. In this network system, communication is performed between the first communication terminal device and the second communication terminal device via short-range wireless communication, and between the second communication terminal device and the information center via the Internet line. By communicating, information can be transmitted and received between the vehicle and the information center.

JP 2011-091534 A

  In recent years, demands for cooperation between in-vehicle networks and external devices have been increasing. That is, the amount of vehicle data provided from the in-vehicle network to the external device via the external network or the like, and similarly, the amount of data provided from the external device to the in-vehicle network via the external network or the like is increasing.

  On the other hand, since vehicles such as automobiles move, changes in the communication state by radio between the vehicle and the base station interposed in the communication path to the external device, changes in the communication state due to changes in the base station accompanying movement, etc. It is inevitable that the communication state between the in-vehicle network and the external network varies. For this reason, in the network system described in Patent Document 1, information (vehicle data) can be transmitted between the vehicle and the external device (information center), but the communication state change caused by the movement of the vehicle. Is an unknown when it affects the transmission of such vehicle data, and there is a possibility that this cannot be dealt with satisfactorily. Such inconvenience also occurs when data from an external device is provided to the in-vehicle network. In addition, any change that affects the communication state, such as disturbance caused by the environment, not only due to the movement of the vehicle, is an impediment to data transmission that cannot be ignored, as described above.

  The present invention has been made in view of such circumstances, and the purpose of the present invention is to appropriately exchange data even if a change occurs in the communication state between the mobile body that exchanges data and the external device. A communication system and a communication method that can be used.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
A communication system that solves the above problems is a communication system that performs communication of a data group including a plurality of types of data via a communication line between a communication device mounted on a mobile body and an external device outside the mobile body. A transmission amount calculating unit for calculating a data transmission amount of the communication line based on a transmission state of data via the communication line, and converting the data amount of each data constituting the data group into the calculated data transmission amount. Each of the corresponding data amounts is adjusted, and a creation unit that creates the data group to be communicated based on the data of the adjusted data amount, and the data group created by the creation unit via the communication line And a transmission unit for transmitting.

  A communication method for solving the above problem is a communication in a communication system that performs communication of a data group including a plurality of types of data via a communication line between a communication device mounted on a mobile body and an external device outside the mobile body. In this method, a data transmission amount of the communication line is calculated based on a transmission state of data via the communication line, and a data amount of each data constituting the data group corresponds to the calculated data transmission amount. The gist is to adjust each data amount, create a data group to be communicated based on the adjusted data amount, and transmit the created data group via the communication line.

  When it is necessary to transmit a plurality of types of data to a transmission destination such as an external device, a data group created from the data may be transmitted by one communication or a plurality of communications within a predetermined period. At this time, if the data transmission amount of the communication line is reduced, there is a possibility that the transmitted data becomes out of date or a timeout occurs and the transmission of the data group is not completed. Therefore, for example, it may be possible to reduce the amount of data to be transmitted uniformly in order to reduce the amount of transmission, but it is difficult to predict the effect of the uniform amount of data on the services of external devices, and the accuracy of some data Shortages can make the service itself impossible.

  According to such a configuration or method, the data amount of each data constituting the data group can be adjusted according to the data transmission amount of the communication line. For example, by adjusting the data amount of each data according to the target service or the like, it is possible to reduce the amount of data to be transmitted while maintaining the maximum data content necessary for the service. For example, while maintaining the amount of highly important data that greatly affects the service among multiple data, the amount of less important data that does not affect the service is reduced to reduce the amount of data. However, it is possible to suppress the influence of the reduction in the amount of data on the service intended for data transmission as much as possible. As a result, even if a change occurs in the communication state between the mobile body that transmits and receives data and the external device, the data is appropriately transferred.

As a preferred configuration, the creation unit adjusts the data amount of a part of the data constituting the data group to a data amount corresponding to the data transmission amount.
According to such a configuration, it is possible to adjust the data amount to be transmitted by adjusting the data amount of at least a part of data constituting the data group to be transmitted based on the data transmission amount. Thereby, the data amount of the data group can be adjusted according to the importance of each data.

  As a preferred configuration, the creation unit sets each data constituting the data group separately for transmission purposes, and adjusts the data amount of the set data according to the calculated data transmission amount.

  The type of data constituting the data group to be transmitted varies depending on the purpose of transmitting the data, for example, the service to be obtained. Therefore, as in this configuration, data according to the purpose of transmitting data is set, and the data amount of the set data is adjusted according to the data transmission amount. Thereby, the data amount of the data group having data corresponding to the transmission purpose is adjusted according to the calculated data transmission amount.

As a preferred configuration, the creation unit is provided in the mobile body, and a data group to be transmitted from the mobile body to the external device is created by the creation unit.
In many cases, the mobile unit transmits the acquired mobile unit data to an external device in real time. Therefore, according to this configuration, by creating and transmitting a data group having a data amount appropriately corresponding to the data transmission amount, transmission delay and unsent transmission are prevented from occurring in the data group to be transmitted. The possibility that it will be possible to maintain the real-time nature of increases.

  As a preferred configuration, the data processing unit includes a holding unit that holds each data amount corresponding to the data transmission amount of the communication line calculated by the transmission amount calculation unit, and the creation unit includes the calculated data The data amount of each data corresponding to the transmission amount is selected from the holding unit, and the data group to be transmitted is created based on the data amount of each selected data.

  According to such a configuration, the data amount of each data corresponding to the calculated data transmission amount is held in the holding unit, so that the data amount corresponding to the calculated data transmission amount of the communication line is configured. The data group to be processed can be created quickly and easily. For example, data groups including data groups with a short transmission interval can be suitably transmitted.

  As a preferred configuration, the created data group is composed of a combination of types of data determined according to the purpose of data transmission, and the holding unit calculates a data amount of each data corresponding to the calculated data transmission amount. Stored separately for the purpose of transmission.

  The combination of data constituting the data group differs depending on the purpose of transmitting the data, for example, the service desired to be received. Thus, as in this configuration, by setting the types of data according to the purpose of data transmission and the data amount of the data in the holding unit, the data group can be quickly created by the creating unit. In other words, the creation unit can set the combination of data held in the holding unit for each communication purpose, and can quickly adjust the data amount of the data to the data amount corresponding to the calculated data transmission amount. Become.

  As a preferred configuration, an electronic signature is associated with each data purpose held for each transmission purpose in the holding unit, and the creation unit selects the transmission selected from the holding unit. When it is verified that the electronic signature associated with the data amount of each data held for each purpose is valid, the data group to be transmitted is created based on the data amount of each selected data.

  According to such a configuration, the data group to be transmitted is created when it is verified that the electronic signature associated with each transmission purpose is valid. As a result, when the electronic signature is valid, the data group is created and transmitted.On the other hand, when the electronic signature is invalid, the data group is not created and transmitted. It will be kept high.

  In addition, by associating the electronic signature with each transmission purpose, it is possible to associate one electronic signature with the data amount of each data corresponding to the calculated data transmission amount held for each transmission purpose in the holding unit. This facilitates management of electronic signatures.

As a preferred configuration, the holding unit is provided in the moving body.
According to such a configuration, creation of a data group transmitted from the mobile body to the external device can be easily performed in the mobile body.

As a preferred configuration, the holding unit acquires and holds the data amount of each piece of data corresponding to the calculated data transmission amount from an external device that is a transmission destination of the data.
According to such a configuration, by obtaining the type of data necessary for the service of the external device from the external device, the holding unit can change the data depending on the purpose (service) to be transmitted to the external device. It becomes possible to appropriately create a data group composed of the types. The holding unit can also create the data amount of the data group as a data amount corresponding to the importance of each data designated by the external device.

As a preferred configuration, the transmission amount calculation unit calculates the data transmission amount of the communication line every time a data group is transmitted.
According to such a configuration, each time a data group is transmitted, the data transmission amount of the communication line at that time is calculated. Will be able to create.

As a preferred configuration, the transmission unit lengthens the transmission interval of the data group according to a decrease in the data transmission amount calculated by the transmission amount calculation unit.
According to such a configuration, in addition to the adjustment of the data amount, the transmission delay of the data transmission that may occur in the transmission of the data via the communication line in which the data transmission amount is reduced is increased by extending the transmission interval of the data group. Non-transmission can be prevented and data transmission according to the purpose can be maintained.

The block diagram which shows the schematic structure about one Embodiment of a communication system. The block diagram which shows schematic structure of the communication information processing part of the communication system. The list | wrist which shows the relationship between each data contained in the data group set to the communication information processing part of the communication system according to a communication class, and each data included in the data group. The list | wrist which shows the relationship between the transmission rate set to the communication information processing part of the communication system, and a communication class. The flowchart which shows the procedure of the data creation process in the communication information processing part of the communication system. The list | wrist which shows the structural example of the data contained in the data group used in other embodiment of a communication system. The block diagram which shows the schematic structure about other embodiment of a communication system. The block diagram which shows the schematic structure about other embodiment of a communication system.

An embodiment of a communication system will be described with reference to the drawings.
First, the outline of this communication system will be described with reference to FIG.
As shown in FIG. 1, the communication system is a network 40 as a communication line, a connection server 10 that is communicably connected to the network 40, and a mobile object such as an automobile that is communicably connected to the connection server 10. Vehicle 20.

  The network 40 is a public communication line, the so-called Internet. The network 40 can connect a plurality of devices that communicate via the network, and can provide a communication path between the connected devices. In the present embodiment, a first service server 41 as an external device, a second service server 42 as an external device, and the connection server 10 are connected to the network 40 so as to be able to communicate with each other. Since the first and second service servers 41 and 42 are similar servers, the first service server 41 will be described below, and the description of the second service server 42 will be given when necessary. Omitted except. By the way, for communication via a communication line such as the Internet, the communication speed is restricted to the slowest communication speed in the communication path. There is a tendency that fluctuations are inevitable.

  The first service server 41 is a server that acquires various services for the vehicle 20. The first service server 41 acquires the types of vehicle data necessary for each service from the vehicle 20 and performs processing of information related to various services based on the acquired vehicle data. Then, the first service server 41 provides the processing result to the vehicle 20 that provided the vehicle data used for the processing. That is, the first service server 41 is a service server that provides the vehicle 20 with a service corresponding to the vehicle data acquired from the vehicle 20.

  The first service server 41 has a plurality of services 30 for vehicles, and determines the types of vehicle data that need to be acquired from the vehicle 20 for processing of the services 30 separately from each service 30. A data list 32 is provided. That is, in order to provide the service 30, the first service server 41 needs to acquire the necessary type of vehicle data from the vehicle 20 based on the data list 32 corresponding to the service 30. In other words, the vehicle 20 needs to acquire the data list 32 from the first service server 41 in order to use the service 30 of the first service server 41. Therefore, in the present embodiment, the first service server 41 transmits the type of the service 30 and the data list 32 corresponding to each service 30 to the vehicle 20 that is a service providing target in advance. If the first service server 41 includes the data list 32 corresponding to the service 30, it is easy to update / change the data list 32 in accordance with the update / change of the content of the service 30.

  Note that the second service server 42 also has a plurality of services 31 for vehicles, and, apart from each service 31, stores a plurality of types of vehicle data that need to be acquired from the vehicle 20 for processing of the service 31. A predetermined data list 33 is provided. That is, the second service server 42 also needs to acquire the necessary type of vehicle data from the vehicle 20 based on the data list 33 corresponding to the service 31 in order to provide the service 31.

  Here, the relationship between the service 30 of the first service server 41 and the data list 32 will be exemplified. Since the relationship between the service 31 of the second service server 42 and the data list 33 is the same as the relationship between the service 30 of the first service server 41 and the data list 32, the description thereof is as described above. Omit.

  The first service server 41 responds to a request for a predetermined service 30 from the vehicle 20 and the vehicle data of the type necessary for the service 30 based on the transmitted vehicle data. The processing related to the requested service 30 is performed, and the processing result related to the requested service 30 is provided to the vehicle 20. For example, when the first service server 41 is requested for a service for providing tourist information from the vehicle 20 and the current position and the traveling direction are transmitted as vehicle data necessary for the service, the first current server 41 is transmitted. Processing related to services that provide tourist information based on directions is performed. Then, the first service server 41 provides the vehicle 20 with the processing result of the service that provides the tourist information, that is, the tourist information extracted as the tourist information of the region predicted as the destination of the vehicle 20. At this time, the first service server 41 narrows down the destination to provide tourist information when detailed location information is sent, while it provides wide-area tourist information when rough location information is sent. Provide information. If the traveling direction is not included, sightseeing information in a range centering on the current position is provided. In other words, the type and accuracy of the vehicle data required for the service 30 are not necessarily fixed. The content provided according to the obtained vehicle data is adjusted, and the vehicle data appropriate for the obtained vehicle data is adjusted. The result of the service 30 can be provided. As described above, the first service server 41 can change the contents of the service to be provided according to the contents and accuracy of the obtained vehicle data, and the result is determined to be discretion with respect to the obtained information. Can be returned.

  The connection server 10 is a server that provides a connection service to the network 40 to the vehicle 20, for example, a provider. The connection server 10 is communicably connected to the network 40 and is also communicably connected to the vehicle 20.

  The connection server 10 includes a network communication device 11 that performs mutual data communication with the network 40 and a vehicle-to-vehicle communication device 12 that performs mutual data communication with the vehicle 20 by wireless communication. The connection server 10 is configured to be able to exchange communication data between the network communication device 11 and the vehicle communication device 12.

  The network communication device 11 is communicably connected to the network 40 via a wired line or a wireless line. Between the connection server 10 and the first and second service servers 41 and 42 connected to the network 40. Enables data communication.

  The vehicle-to-vehicle communication device 12 is connected to the vehicle 20 through a communication line including a wireless line, and enables various data communications between the connection server 10 and the vehicle 20. Through this data communication, the connection server 10 receives data transmitted from the vehicle 20 and transmits data from the network 40 to the vehicle 20. Further, the vehicle-to-vehicle communication device 12 is configured such that only the vehicle 20 having the access authority to the connection server 10 is connected. In the present embodiment, it is assumed that the vehicle 20 has an access authority to the connection server 10.

  That is, the connection server 10 transmits and receives communication data between the network communication device 11 and the vehicle communication device 12, so that the vehicle 20 connected to the vehicle communication device 12 and the network communication device 11 are connected via the network 40. And the first service server 41 connected to each other can be connected to each other. Therefore, the communication line between the vehicle 20 and the first service server 41 includes a communication line including a wireless line between the vehicle 20 and the vehicle communication device 12, and the service server 41 of the network communication devices 11 and 1. And a communication line including a network 40 between the communication line and the like. Note that the transmission rate from the connection server 10 to the first service server 41 may decrease due to a communication state such as the network 40 being congested, and the transmission rate from the vehicle 20 to the connection server 10 is a communication by wireless communication. May decrease depending on conditions.

  The vehicle 20 is an automobile vehicle and includes an in-vehicle communication device 21 for wireless communication with the connection server 10 and a communication information processing unit 22 connected to the in-vehicle communication device 21 so as to be communicable. The vehicle 20 includes a gateway (GW) 23 that is communicably connected to the communication information processing unit 22 and a plurality of ECUs (electronic control units) 24 to 27 that are communicably connected to the gateway (GW) 23. ing. The communication information processing unit 22 and the GW 23 are connected by a known communication bus and communicate a communication message including vehicle data through a known communication protocol. The GW 23 and each of the ECUs 24 to 27 are connected by a known communication bus, and communicate a communication message including vehicle data through a known communication protocol. For example, as a known communication bus and a known communication protocol, CAN (controller area network), LIN (local interconnect network), and Ethernet (registered trademark) are standards applied to a network particularly suitable for in-vehicle use. Etc.

  In general, the ECU is a control device that is used for various controls of the vehicle 20, and is a control device that controls, for example, a drive system, a travel system, a sensor system, an information device system, and the like. For example, an ECU for a drive system is an ECU for an engine, an ECU for a travel system is an ECU for a steering, and an ECU for a brake. An ECU to which sensors such as a sensor and a speed sensor are connected is exemplified. An ECU for controlling the information device system includes an ECU for a navigation device.

  In the present embodiment, for each of the ECUs 24 to 27, the sensors connected to the ECUs 24 to 27 and various vehicle data calculated by processing information from the sensors will be described, and other controls will be described. I will omit the explanation of the functions. That is, each of the ECUs 24 to 27 may be an ECU that performs the control as described above.

  The ECU 24 is an ECU that can calculate the current position and the traveling direction, and is connected to a GPS (global positioning system) sensor 241. The ECU 24 calculates the current position and traveling direction of the vehicle 20 based on the position information acquired from the GPS sensor 241, and outputs the calculated current position and traveling direction to the GW 23 as vehicle data.

  The ECU 25 is an ECU that can calculate the traveling speed of the vehicle 20 and is connected to a speed sensor 251. The ECU 25 calculates the current traveling speed of the vehicle 20 based on the speed information acquired from the speed sensor 251 and outputs the calculated current traveling speed to the GW 23 as vehicle data.

  The ECU 26 is an ECU that can calculate the operation amounts of various pedals in the vehicle 20, and is connected to an accelerator pedal sensor 261 and a brake pedal sensor 262. The ECU 26 calculates an operation amount of the accelerator pedal based on the information acquired from the accelerator pedal sensor 261, and outputs the calculated operation amount of the accelerator pedal to the GW 23 as vehicle data. Further, the ECU 26 calculates a brake pedal operation amount based on the information acquired from the brake pedal sensor 262, and outputs the calculated brake pedal operation amount to the GW 23 as vehicle data.

  The ECU 27 is an ECU that can calculate the steering operation amount in the vehicle 20 and is connected to a steering sensor 271. The ECU 27 calculates a steering operation amount based on the information acquired from the steering sensor 271 and outputs the calculated steering operation amount to the GW 23 as vehicle data.

  The GW 23 is a device that relays or forwards communication messages between a plurality of communication lines. The GW 23 acquires communication messages including various vehicle data from the ECUs 24 to 27 via one communication bus to which the ECUs 24 to 27 are connected, and the communication information processing unit 22 connects these acquired communication messages. Is output to the communication information processing unit 22 via another communication bus. For example, the GW 23 receives the vehicle data of the current position and the traveling direction input from the ECU 24, the vehicle data of the traveling speed input from the ECU 25, the vehicle data of the accelerator pedal operation amount and the brake pedal operation amount input from the ECU 26, and the ECU 27. The vehicle data of the amount of steering of the steering wheel input from is transferred to the communication information processing unit 22 respectively.

  Thus, the GW 23 is interposed between one communication bus to which the plurality of ECUs 24 to 27 are connected and the other communication bus to which the communication information processing unit 22 is connected, so that one communication bus is provided. Even if there is a difference between the communication standards of other communication buses and the communication standards of other communication buses, communication messages including vehicle data can be communicated between the two communication buses.

  The communication information processing unit 22 holds various vehicle data acquired from the ECUs 24 to 27 via the GW 23, and creates a data group from the plurality of vehicle data held. The communication information processing unit 22 outputs the created data group to the first service server 41 outside the vehicle. The data group includes a plurality of vehicle data required according to the purpose of transmission, and the data group is a first target to be transmitted via the in-vehicle communication device 21 and the connection server 10. It is output to the service server 41.

  The communication information processing unit 22 performs data communication with the in-vehicle communication device 21 based on flow control. Therefore, the communication information processing unit 22 controls data transmission from the communication information processing unit 22 to the in-vehicle communication device 21 based on a signal notified from the in-vehicle communication device 21 indicating whether transmission is possible. For example, when the communication information processing unit 22 receives a signal indicating that transmission is possible from the in-vehicle communication device 21, the communication information processing unit 22 sequentially transmits data constituting the data group. Temporarily stop transmission of data in that data group.

  Furthermore, the communication information processing unit 22 can receive and hold communication data outside the vehicle via the in-vehicle communication device 21, and can also process the received communication data and respond as necessary. .

  The in-vehicle communication device 21 is an in-vehicle wireless communication device for enabling wireless communication between the connection server 10 and the communication information processing unit 22. The wireless communication between the in-vehicle communication device 21 and the connection server 10 is communication using a mobile phone network, a wireless LAN, or the like, but may be another known communication method. The in-vehicle communication device 21 transmits the data group transmitted from the communication information processing unit 22 to the connection server 10. The in-vehicle communication device 21 receives communication data transmitted from the connection server 10 to the vehicle 20 and transmits the communication data to the communication information processing unit 22. Since wireless communication is used for connection with the connection server 10, changes in the communication environment accompanying the movement of the vehicle 20 may change the communication state such as the communication speed of the wireless communication or temporarily interrupt the wireless communication. Unavoidable. For example, it is known that when the vehicle 20 travels in a tunnel, an underground passage, or in a mountain, the wireless communication status deteriorates, the communication speed decreases, or communication is interrupted. Such deterioration or interruption of communication changes the signal state of communication enable / disable in flow control to disable communication. In addition, the signal status indicating whether communication is possible or not in the flow control is also changed so that communication is impossible by an instruction from the connection server 10, for example, an instruction based on the fact that the network 40 is congested.

Next, the details of the communication information processing unit 22 will be described with reference to FIG.
The communication information processing unit 22 transmits the data group created according to the purpose of transmission to the first service server 41 that is the target of the transmission. In the present embodiment, the purpose of transmission is for the vehicle 20 to receive the result of the predetermined service 30 selected from the various services 30 provided by the first service server 41, and the vehicle 20 receives the predetermined service. A data group including vehicle data of a type necessary for receiving is created. And the communication information processing part 22 transmits to the 1st service server 41 which provides the service 30 aiming at the produced data group.

  The communication information processing unit 22 includes a data buffer unit 221 to which various types of vehicle data are input from the GW 23, and a data organization unit 222 as a creation unit that acquires various types of vehicle data from the data buffer unit 221 and creates a data group. . The communication information processing unit 22 includes a data reception unit 223 that receives communication data from the connection server 10 via the in-vehicle communication device 21, and a table management unit 224 that manages communication data input from the data reception unit 223. A storage unit 225 as a storage unit managed by the table management unit 224. Further, the communication information processing unit 22 includes a knitting data management unit 226 that manages the transmission timing of the data group input from the data organization unit 222, and a data transmission unit that transmits the data group managed by the knitting data management unit 226. 227. The communication information processing unit 22 includes a transmission time calculation unit 228 as a transmission amount calculation unit that calculates a transmission rate (transmission speed) as a data transmission amount of the data group transmitted from the data transmission unit 227. In the present embodiment, the vehicle 20 must acquire the data list 32 from the first service server 41. Therefore, the communication information processing unit 22 acquires the data list 32 according to a user instruction or accesses the first service server 41 under a predetermined condition such as at the time of start-up and the data list 32 is updated. I try to get it.

  The data receiving unit 223 receives communication data from the first service server 41 and the like via the network 40, the connection server 10, and the in-vehicle communication device 21. When the content of the input communication data is a signal requesting a data group, the data receiving unit 223 outputs the signal data to the data organization unit 222. Further, when the content of the input communication data is the data list 32 corresponding to the predetermined service 30, the data receiving unit 223 outputs the data list 32 to the table management unit 224.

  The table management unit 224 stores and manages the data list 32 input from the data reception unit 223 in the storage unit 225 separately from the service 30. Further, the table management unit 224 indicates the type and amount of vehicle data corresponding to the transmission purpose and the transmission rate based on the transmission purpose and the transmission rate input from the data organization unit 222. Obtained from the list 32 and output to the data organization unit 222.

  The storage unit 225 can be written and read by the table management unit 224, and the data list 32 is written for each service 30 by the table management unit 224, and the written data list 32 is read for each service 30. .

Here, the data list 32 will be described in detail.
As shown in FIG. 3, the data list 32 of the present embodiment includes a transmission destination URL indicating a destination of the service 30 to be transmitted and a data element indicating a type of vehicle data corresponding to the transmission purpose.

  The transmission destination URL is an Internet address of a transmission destination determined by the service 30 to be transmitted, and corresponds to the transmission purpose. That is, a destination for providing the service 30 of the first service server 41 is set in the transmission destination URL of the data list 32 corresponding to the service 30 of the first service server 41. For example, when the domain name of the first service server 41 is “aaa.bbb.com” and the service name is “ccc”, the destination URL is indicated as “https://aaa.bbb.com/ccc”. . Since “https” indicates a communication protocol, other notations are used when the communication protocol is different. The domain name may be expressed by an IP (Internet Protocol) address or the like.

  The data elements include six vehicle data that can be acquired from the ECUs 24 to 27 of the vehicle 20. The six vehicle data includes position data indicating the current position, direction data indicating the traveling direction, speed data indicating the traveling speed, accelerator data indicating the operation amount of the accelerator pedal, brake data indicating the operation amount of the brake pedal, and Steering data indicating the amount of steering operation is included. That is, the vehicle 20 creates a data group composed of the six vehicle data described in the data list 32 in order to obtain the result of the target service from the first service server 41 based on the data list 32. The created data group is transmitted to the destination URL.

In the data list 32, four communication classes are set, and a transmission cycle corresponding to each communication class and another data amount of each data are set.
As shown in FIG. 4, the correspondence relationship between the four communication classes and the transmission rate is set in the correspondence list 229. The correspondence list 229 is a list for associating the transmission rate with the communication class, and is held in the storage unit 225 or the like so that the table management unit 224 can refer to it. In the correspondence list 229, the communication class when the transmission rate is “2 kbps (kilobit second)” is “1”, the communication class when the transmission rate is “1 kbps” is “2”, and the transmission rate is “400 bps”. Is set to “3”, and the communication class when the transmission rate is “200 bps” is set to “4”. That is, the four communication classes are classified according to the transmission rate, and the class when the transmission rate is high (the communication speed is high) is “1”, and then sequentially according to the decrease in the transmission rate. The class is “2” and “3”, and the class when the transmission rate is the lowest (the communication speed is slow) is “4”. That is, the table management unit 224 selects the communication class “1” when the communication speed (transmission rate) is “2 kbps” or more, and selects the communication class “2” when the transmission rate is less than “2 kbps” and “1 kbps” or more. select. The table management unit 224 selects the communication class “3” when the transmission rate is less than “1 kbps” and “400 bps” or more, and selects the communication class “4” when the transmission rate is less than “400 bps” and “200 bps” or more. select.

  The transmission cycle of the data list 32 illustrated in FIG. 3 is a cycle in which the data group is transmitted to the first service server 41. As the transmission cycle, a short time is set when the transmission rate is high, and a long time is set when the transmission rate is low. Note that the transmission cycle does not necessarily change according to the change in the transmission rate, and may be maintained at a constant value when the transmission rate is within a predetermined range. For example, in the data list 32, the transmission cycle for the communication classes “1” and “2” are both set to “250 milliseconds”, and the transmission cycle for the communication class “3” is “500 milliseconds”. And the transmission cycle when the communication class is “4” is set to “1000 milliseconds (1 second)”.

  In the data list 32, a data amount for each of the six vehicle data is set for each communication class. More specifically, in the data list 32, when the communication class is “1”, the position data is “128 bits”, the direction data is “8 bits”, the speed data is “8 bits”, and the accelerator data is “ “4 bits”, “4 bits” for brake data, and “8 bits” for steering data are set as respective data amounts. In the data list 32, when the communication class is "2" to "4", the position data is "64 bits", the direction data is "8 bits", the speed data is "8 bits", and the accelerator data is “4 bits”, “4 bits” for brake data, and “8 bits” for steering data are set as the respective data amounts.

  That is, when the communication class is “1”, the data amount of the data group is “160 bits”, and when the communication class is “2” to “4”, the data amount of the data group is “96 bits”. In other words, adjusting the amount of data in the data group prevents transmission delays and unsent data transmission that may occur in data transmission over a communication line with reduced data transmission volume, and maintains data transmission according to the purpose. can do.

  In addition, the number of transmissions per second when the communication class is “1” and “2” is “4 times” (= 1 second / 250 milliseconds), and the number of transmissions per second when the communication class is “3”. The number of times is “twice” (= 1 second / 500 milliseconds), and the number of transmissions per second when the communication class is “4” is “one time” (= 1 second / 1000 milliseconds).

  As a result, the “data amount of the data group transmitted per second (transmission amount)” for each communication class is the largest when the communication class is “1”, and in the order of the communication classes “2” and “3”. The number is reduced, and the communication class “4” is the smallest. That is, the transmission amount when the communication class is “1” is “640 bits” (= 160 bits × 4 times), and the transmission amount when the communication class is “2” is “384 bits” (= 96 bits × 4 times). The transmission amount for the communication class “3” is “192 bits” (= 96 bits × 2 times), and the transmission amount for the communication class “4” is “96 bits” (= 96 bits × Once). In other words, if the amount of data transmitted per second is “1 times” when the communication class is “1”, the amount of data when the communication class is “2” is “0.6 times”. The data amount when “3” is “0.3 times”, and the data amount when communication class is “4” is “0.15 times”. In other words, in addition to adjusting the amount of data, changing the transmission cycle to extend the transmission interval of the data group can also cause the transmission of data transmission that may occur in the transmission of data via a communication line with a reduced amount of data transmission Delay and non-transmission can be prevented, and data transmission according to the purpose can be more suitably maintained.

  Note that the data amount of each data in the data list 32 is reduced when the communication class is lowered, but is adjusted so that the degradation of the service 30 by the first service server 41 is reduced. That is, the data amount of each data in the data list 32 is set so that the data amount to be transmitted can be reduced while maintaining the maximum data amount of the vehicle data necessary for the service 30. For example, among the plurality of vehicle data, adjustment is made so that the amount of highly important vehicle data that greatly affects the service 30 is maintained, and the amount of less important vehicle data that does not affect the service 30 is reduced. It is adjusted so that. Thereby, while reducing the data amount of the data group transmitted from the vehicle 20 to the first service server 41, the influence of the reduction of the data amount on the result of the service 30 intended to transmit the vehicle data is suppressed as much as possible. ing.

  As shown in FIG. 2, the data buffer unit 221 receives various vehicle data output from the ECUs 24 to 27 via the GW 23, and the latest vehicle data among the input various vehicle data. Hold. Further, the data buffer unit 221 outputs the requested vehicle data to the data organization unit 222 in response to the vehicle data request from the data organization unit 222.

  The data organization unit 222 creates a data group corresponding to the purpose of transmitting vehicle data, that is, the service 30 desired to be received from the first service server 41. The data organization unit 222 may be instructed by the user via the navigation device or the like for the service 30 desired to be received from the first service server 41, may be set in advance, or automatically according to the vehicle state or the like. May be selected. Further, each time the transmission time calculation unit 228 calculates the transmission rate, the data transmission unit 222 receives the calculated transmission rate. Further, the data reception unit 223 receives various communication data from the network 40.

  The data organization unit 222 transmits the transmission purpose and the transmission rate to the table management unit 224, and the contents of the data list 32 matching the transmission purpose and the transmission rate from the data list 32 of the storage unit 225 via the table management unit 224. To get.

  In addition, the data organization unit 222 acquires, from the data buffer unit 221, the type of vehicle data necessary for creating the data group based on the data list 32 acquired from the storage unit 225. Then, the data organization unit 222 adjusts the data amount of the acquired vehicle data so as to match the data amount of each vehicle data defined in the data list 32 acquired from the storage unit 225. That is, the data organization unit 222 adjusts the data amount of the data group to be transmitted according to the transmission rate.

  The data group created by the data organization unit 222 is input to the organization data management unit 226. The organization data management unit 226 outputs the input data group to the data transmission unit 227 at a predetermined transmission timing. The composition data management unit 226 may immediately output the input data group to the data transmission unit 227.

  The data transmission unit 227 outputs the data group input from the composition data management unit 226 to the in-vehicle communication device 21. The data transmission unit 227 performs data transmission to the in-vehicle communication device 21 based on flow control from the in-vehicle communication device 21. Therefore, a data group from the data transmission unit 227 to the in-vehicle communication device 21 is transmitted or temporarily stopped based on the flow control of the in-vehicle communication device 21. For example, when the data transmission from the in-vehicle communication device 21 to the connection server 10 is smooth, the data is also smoothly output from the data transmission unit 227 to the in-vehicle communication device 21 based on the flow control. On the other hand, when the data transmission from the in-vehicle communication device 21 to the connection server 10 is unsatisfactory for some reason, the data output from the data transmission unit 227 to the in-vehicle communication device 21 is also temporarily stopped based on the flow control. Whether or not the data transmission to the connection server 10 is smooth is influenced by the quality of the wireless communication state between the in-vehicle communication device 21 and the connection server 10, and the first service from the connection server 10. It may be affected by the quality of the communication state of the communication line up to the server 41.

Further, the data transmission unit 227 outputs the transmission state of the data group to be transmitted to the transmission time calculation unit 228.
The transmission time calculation unit 228 calculates the transmission rate (transmission speed) of the data group and outputs the calculated transmission rate of the data group to the data organization unit 222. The transmission time calculation unit 228 calculates the transmission rate of the data group every time the data group is transmitted based on the transmission state of the data group transmitted from the data transmission unit 227. The transmission time calculation unit 228 calculates the transmission rate of the data group by dividing the transmitted data amount (number of transmission bits) by the time required for transmission of the data amount (transmission required time). That is, the transmission rate is calculated from the expression “number of transmission bits / required transmission time”.

  Next, the operation of the communication information processing unit 22 will be described with reference to FIG. FIG. 5 shows processing for creating a data group transmitted by the communication information processing unit 22. The creation of this data group is executed whenever it becomes necessary to transmit the data group from the vehicle 20 to the first service server 41.

  When a data group needs to be transmitted, a process for creating the data group is started, and the communication information processing unit 22 specifies a communication class and specifies the data amount of each data corresponding to the communication class (see FIG. 5 step S10). In other words, the data organization unit 222 of the communication information processing unit 22 transmits the latest transmission rate and the transmission purpose input from the transmission time calculation unit 228 to the table management unit 224. When the transmission time calculation unit 228 has not calculated the transmission rate, the data organization unit 222 uses the initial setting value as a temporary transmission rate. The table management unit 224 identifies the communication class based on the transmission rate and the correspondence list 229. Next, the table management unit 224 specifies a transmission destination URL corresponding to the transmitted transmission purpose based on a correspondence list (not shown) and specifies the data list 32 corresponding to the specified transmission destination URL. Then, the table management unit 224 acquires the type of data included in the specified data list 32, acquires the data amount corresponding to the communication class specified for each acquired data, and stores the acquired data The type and the data amount corresponding to each data are transmitted to the data organization unit 222.

  When the data amount of each data is specified, the communication information processing unit 22 performs data organization, that is, creates a data group (step S11 in FIG. 5). The data organizing unit 222 of the communication information processing unit 22 acquires the type of vehicle data transmitted from the table management unit 224 from the data buffer unit 221 so that the data amount specified for the type of vehicle data is obtained. Process the acquired vehicle data. For example, when acquiring 128-bit position data from the data buffer unit 221 and receiving an instruction from the table management unit 224 to set the position data to 64 bits, the data organization unit 222 converts the 64-bit position data to 64 bits. Convert to bits. As a result, the position accuracy indicated by the position data may be lowered, but the data amount is halved. Data conversion uses a known method. When all types of data are adjusted to the designated data amount, a data group is created by arranging the data of the adjusted data amount in the order shown in the data list 32.

  When the data group is created, the communication information processing unit 22 transmits the created data group (step S12 in FIG. 5). The data organization unit 222 of the communication information processing unit 22 transmits the created data group from the in-vehicle communication device 21 to the connection server 10 via the organization data management unit 226 and the data transmission unit 227. The data group transmitted to the connection server 10 is transmitted to the target service of the first service server 41 corresponding to the transmission destination URL.

  When the transmission of the data group is completed, the communication information processing unit 22 determines whether or not to repeat the transmission of the data group (step S13 in FIG. 5). If it is determined that the transmission of the data group cannot be repeated (NO in step S13 in FIG. 5), the communication information processing unit 22 ends the transmission of the data group. Note that the decision not to repeat the transmission of the data group can be made based on an end instruction from the user, reaching the set number of times or time, or other conditions. And the data organization part 222 of the communication information processing part 22 complete | finishes transmission of a data group.

  On the other hand, when it is determined that the transmission of the data group is repeated (YES in step S13 in FIG. 5), the communication information processing unit 22 calculates a transmission rate (steps S14 and S15 in FIG. 5). The determination that the transmission of the data group is repeated can be made based on the fact that there is no interruption operation from the user, the set number of times or the time has not been reached, and other conditions. The transmission time calculation unit 228 calculates the time required for transmission of the data group based on the transmission of the immediately preceding data group, that is, the required transmission time, and calculates the transmission rate of the data group based on the calculated transmission required time. . Then, the calculated transmission rate is transmitted from the transmission time calculation unit 228 to the data organization unit 222. Then, the communication information processing unit 22 returns the data group transmission process to step S10, and repeats the data group transmission process based on the newly calculated communication rate.

  Thereby, even if a change occurs in the communication state between the vehicle 20 and the first service server 41, that is, the transmission rate is lowered, a data group in which the data amount is adjusted according to the sequential transmission rate is created. Is done. The data transmitted from the vehicle 20 is appropriately received by the first service server 41 even when the communication state changes due to the communication using the data group thus created.

As described above, the communication system according to the present embodiment has the effects listed below.
(1) When it is necessary to transmit a plurality of types of vehicle data to a transmission destination such as the first or second service server 41 or 42, a data group created from the vehicle data is transmitted once or for a predetermined period. It may be transmitted by a plurality of communications. At this time, if the transmission rate of the communication line is lowered, there is a possibility that the transmitted data is not up-to-date or a timeout occurs and the transmission of the data group is not completed. Therefore, for example, it is conceivable to reduce the data amount of each vehicle data to be transmitted in order to reduce the transmission amount, but the uniform reduction of the data amount affects the service 30 of the first or second service server 41 or 42. The influence is difficult to predict, and the lack of accuracy of some vehicle data may make the service 30 itself impossible.

  Therefore, the data amount of each vehicle data constituting the data group is adjusted according to the transmission rate of the communication line. For example, by adjusting the amount of each vehicle data according to the target service 30 or the like, the amount of data to be transmitted can be reduced while maintaining the content of the vehicle data necessary for the service 30 to the maximum extent. It becomes like this. For example, among the plurality of vehicle data, while maintaining the amount of highly important vehicle data that greatly affects the service 30, the amount of less important vehicle data that does not affect the service 30 is reduced. While reducing the amount of data, it is possible to suppress the influence of the reduction in the amount of data on the service 30 intended for transmission of vehicle data as much as possible. Thereby, even if a change occurs in the communication state between the vehicle 20 that transmits and receives the vehicle data and the first service server 41, the vehicle data is appropriately transmitted and received.

  (2) The amount of data to be transmitted is adjusted by adjusting the amount of position data based on the transmission rate as at least a part of vehicle data constituting the data group to be transmitted. Thereby, the data amount of a data group can be adjusted according to the importance of each data.

  (3) The types of vehicle data constituting the data group to be transmitted differ depending on the purpose of transmitting the vehicle data, for example, the service 30 to be obtained. Therefore, the data organization unit 222 acquires and sets the vehicle data according to the purpose of transmitting the data from the data list 32, and the data amount of the set vehicle data is set in the data list 32 according to the transmission rate. Adjust to the amount of data. As a result, the data amount of the data group having the vehicle data corresponding to the transmission purpose is adjusted according to the calculated transmission rate.

  (4) The vehicle 20 often transmits the acquired vehicle data and the like to the first service server 41 in real time. Therefore, by creating and transmitting a data group with a data amount that appropriately corresponds to the transmission rate, it is possible to prevent the transmission data group from causing transmission delays and non-transmissions, and maintain the real-time transmission of the data group. Is more likely to be possible.

  (5) By storing the data amount of each data corresponding to the calculated transmission rate in the storage unit 225, a data group including vehicle data having a data amount corresponding to the calculated transmission rate of the communication line is obtained. It can be created quickly and easily. For example, data groups including data groups with a short transmission interval can be suitably transmitted.

  (6) The combination of the vehicle data constituting the data group differs depending on the purpose of transmitting the vehicle data, for example, the service 30 desired to be received. Therefore, by setting the types of vehicle data according to the purpose of transmitting vehicle data and the data amount of the vehicle data in the storage unit 225, a data group can be quickly created by the data organization unit 222. That is, it is quick that the data organization unit 222 sets the combination of the vehicle data held in the storage unit 225 for each purpose of communication and adjusts the data amount of the vehicle data to the data amount corresponding to the calculated transmission rate. Will be able to do.

(7) Since the storage unit 225 is provided in the vehicle 20, creation of a data group transmitted from the vehicle 20 to the first service server 41 can be easily performed in the vehicle 20.
(8) By obtaining from the first service server 41 the type of vehicle data required for the service 30 of the first service server 41, the storage unit 225 transmits to the first service server 41. Depending on the purpose (service 30) to be performed, a data group composed of different types of vehicle data can be appropriately created. In addition, the storage unit 225 creates the data amount of the data group as a data amount corresponding to the importance of each vehicle data specified by the first service server 41.

  (9) Each time a data group is transmitted, the transmission time calculation unit 228 calculates the transmission rate of the communication line at that time. It can be created quickly.

  (10) In addition to adjusting the amount of data, extending the transmission interval of the data group also prevents transmission delays and non-transmissions of data transmission that may occur in the transmission of vehicle data via a communication line with a reduced data transmission amount. The data transmission according to the purpose can be maintained.

(Other embodiments)
In addition, the said embodiment can also be implemented with the following aspects.
In the above embodiment, the case where the data list 32 includes each type of data one by one is illustrated. However, the present invention is not limited to this, and a plurality of types of data may be included. In this way, the communication overhead can be reduced by reducing the number of transmissions of the data group.

  As shown in FIG. 6, the number of times of communication can be reduced from two to one by setting two of each type of data. That is, for each data constituting the data group, data for two sampling periods of the data is included. For example, two position data acquired at a sampling period are included as 128 bits as position 1 and position 2, respectively, and two direction data acquired at a sampling period are as 8 bits as direction 1 and direction 2, respectively. May be included. In addition, two speed data acquired with a sampling period are included in 8 bits as speed 1 and speed 2, respectively, and two accelerator data acquired with a sampling period are stored as accelerator 1 and accelerator 2 in 4 bits respectively. May be included. In addition, two brake data acquired with a sampling period are included as 4 bits for brake 1 and brake 2 respectively, and two steering data acquired with a sampling period are set as 8 bits for steering 1 and steering 2 respectively. May be included. Thereby, since the data group for 2 times can be transmitted by communication for 1 time, the communication overhead for 1 time is reduced.

  In the above embodiment, the case where the data list 32 is held in the first or second service server 41 or 42 that provides a service is illustrated. However, the present invention is not limited to this, and the data list may be held in a server other than the service server that provides the service. Such a server may specify the type of vehicle data necessary for the service content provided by the service server and the amount of data corresponding to the communication class of the vehicle data. Thereby, the improvement of the design freedom of a communication system comes to be aimed at.

  As shown in FIG. 7, the data list 32A, 33A corresponding to each service 30, 31 of the first or second service server 41A, 42A may be held in the transmission table server 43. Thereby, the vehicle 20 can acquire only the transmission table server 43 and refer to the data lists 32A and 33A, thereby obtaining the type of data necessary for the target service and the data amount corresponding to the communication class. Therefore, use of the service becomes easy.

  In the above embodiment, the case where the data list 32 is held in the first or second service server 41 or 42 that provides a service is illustrated. However, the present invention is not limited to this, and a data list may be set in the vehicle in advance. Thereby, it becomes possible to save the trouble of the vehicle acquiring the data list from the service server.

  As shown in FIG. 8, data lists 32B and 33B corresponding to the services 30 and 31 of the first or second service server 41B and 42B may be held in the communication information processing unit 22 in advance. Even in this case, the vehicle 20 can obtain the type of data necessary for the service corresponding to the purpose and the data amount corresponding to the communication class by referring to the preset data lists 32B and 33B. Becomes easier.

  In the above-described embodiment, the data list 32 is exemplified for the case where the transmission destination URL, the type of vehicle data, the communication class, the transmission cycle, and the data amount of each vehicle data are set. However, the present invention is not limited to this, and other information such as encoding information and a data compression method may be set in the data list. Thereby, the improvement of the design freedom of a communication system comes to be aimed at.

  In the above embodiment, the case where data organization is performed based on the data amount of each data specified as the data amount of each data corresponding to the communication class when the process of creating the data group is started is illustrated. However, the present invention is not limited to this, and data organization may be performed on the condition that the verification result of the validity of the data amount of each specified data is valid.

  For example, an electronic signature of a specified organization may be given (associated) in advance to the data list, and the electronic signature may be verified before using the data list. Then, the data list may be used when the electronic signature is verified as valid, while the data list may be discarded when the electronic signature is not valid, such as revoked (invalidated). As a result, the collection of vehicle data can be limited to only verified service servers, so that vehicle security can be maintained. Further, since the electronic signature is associated with the data list, the electronic signature is managed according to the transmission purpose via the data list determined according to the transmission purpose. That is, the electronic signature can be easily associated with the data amount of each data corresponding to the calculated transmission rate held in the data list.

  Further, for example, the electronic signature may be associated with the data amount of each data corresponding to the transmission rate. Also by this, the data group to be transmitted is created when it is verified that the electronic signature associated with the data amount of each data corresponding to the calculated data transmission amount is valid.

  In any case, when the electronic signature is valid, the data group is created and transmitted.On the other hand, when the electronic signature is not valid, the data group is not created and transmitted. It will be kept high.

  In the above embodiment, the case where the vehicle 20 communicates with the service server via the connection server 10 and the network 40 is illustrated. However, the present invention is not limited to this, and the communication line between the vehicle and the service server may include a configuration other than the connection server and the network as long as the vehicle and the service server can communicate with each other. Thereby, the improvement of the design freedom of a communication system comes to be aimed at.

  In the above embodiment, the case where the network 40 is the Internet has been illustrated. However, the present invention is not limited to this, and the communication line may be another public line or a dedicated line as long as communication between the vehicle and the service server can be ensured. Thereby, the improvement of the design freedom of a communication system comes to be aimed at.

  In the above embodiment, the case where the first and second service servers 41 and 42 are connected to the network 40 has been illustrated. However, the present invention is not limited to this, and only one of the first and second service servers may be connected to the network. A server other than the first and second service servers may be connected to the network. Thereby, the improvement of the design freedom of a communication system comes to be aimed at.

  In the above embodiment, the case where the first and second service servers 41 and 42 are service servers that provide the vehicle 20 with services corresponding to the vehicle data acquired from the vehicle 20 has been illustrated. However, the present invention is not limited to this, and such a server may be an analysis server that analyzes the acquired information for improving the service, a collection server that only collects information for research or the like, in addition to the service server. Thereby, the improvement of the design freedom of a communication system comes to be aimed at.

  For example, the analysis server collects vehicle data necessary for analysis from the vehicle, analyzes the collected vehicle data, and uses it for probe information, traffic information, road information, and the like. Such information is eventually provided to the vehicle indirectly as useful information, but the analysis server does not directly provide the vehicle with a service corresponding to the vehicle data collected from the vehicle. At this time, it is preferable that the analysis server sets the vehicle data collected from the vehicle in the data list separately from the analysis service, and can collect the vehicle data set in the data list. However, when the collection of the vehicle data set according to the communication line status etc. is not appropriate, the accuracy of the less important vehicle data is reduced or the importance is reduced according to the importance of the vehicle data in the analysis. It is also possible to omit low vehicle data. As a result, while the accuracy of high-importance data is maintained, the accuracy of low-importance data is reduced or omitted, but vehicle data that is useful for analysis by the analysis server is continuously acquired. can do.

  Further, for example, the collection server only collects vehicle data from the vehicle, and does not provide a service directly or indirectly to the vehicle that provided the vehicle data. At this time, it is preferable that the collection server sets the vehicle data collected from the vehicle in the data list separately from the collection service, and can collect the vehicle data set in the data list. However, when the collection of vehicle data set according to the status of the communication line is not appropriate, depending on the importance in the analysis processing of each vehicle data, the accuracy of the less important vehicle data is reduced, The acquisition of less important vehicle data can be omitted. As a result, while the accuracy of highly important vehicle data is maintained, the accuracy of low-importance vehicle data is reduced or omitted, but acquisition of vehicle data useful for analysis of the collection server is not possible. Can continue.

  In the above embodiment, the case where the data organization unit 222 transmits the transmission purpose to the table management unit 224 is exemplified. However, the present invention is not limited to this, and the data organization unit may transmit the transmission destination URL itself to the table management unit. At this time, the table management unit can specify the corresponding data list based on the transmitted destination URL. Thereby, the improvement of the design freedom of a communication system comes to be aimed at.

  In the above embodiment, the table management unit 224 sets the communication class to “1” when the transmission rate is “2 kbps” or higher, “2” when the transmission rate is lower than “2 kbps” and “1 kbps” or higher, and lower than “1 kbps”. Further, the case where “3” is set when “400 bps” or higher and “4” is set when “400 bps” or lower and “200 bps” or higher is shown. However, the present invention is not limited to this, and the transmission rates corresponding to the transmission classes may be distinguished by other transmission rate values. Thereby, the improvement of the design freedom of a communication system comes to be aimed at.

  In the above embodiment, the case where there are four types of communication classes “1” to “4” is illustrated. However, the present invention is not limited to this, and the number of communication classes may be three or less, or five or more. Thereby, the improvement of the design freedom of a communication system comes to be aimed at.

  -In above-mentioned embodiment, the case where GW23 was provided in the vehicle 20 was illustrated. However, the present invention is not limited to this, and the gateway (GW) may not be provided as long as the communication information processing unit can directly receive a communication message from the ECU. Thereby, the improvement of the design freedom of a communication system comes to be aimed at.

  In the above embodiment, the case where the known bus provided in the vehicle 20 is CAN, LIN, or Ethernet (registered trademark) is illustrated. However, the present invention is not limited to this, and a known bus may be a communication standard other than these, for example, FlexRay. Thereby, the application range of the communication system including the information processing apparatus can be expanded.

  In the above embodiment, the communication information processing unit 22 includes the data buffer unit 221, the data organization unit 222, the data reception unit 223, the table management unit 224, the storage unit 225, the organization data management unit 226, the data transmission unit 227, and the transmission time calculation. The case where the unit 228 is configured is illustrated. However, the present invention is not limited to this, and the communication information processing unit may not be configured according to the above-exemplified classifications, such as a part or all of the configuration, as long as the function can be performed. . For example, the data buffer unit and the data organization unit may be integrated. Thereby, the improvement of the design freedom of a communication system comes to be aimed at.

  In the above embodiment, the case where the transmission rate is calculated every time a data group is transmitted is illustrated. However, the present invention is not limited to this, and the transmission rate may be calculated every predetermined number of transmissions of the data group or may be calculated every predetermined time. Thereby, the improvement of the design freedom of a communication system comes to be aimed at.

  In the above embodiment, the case where the data type and the data amount for each communication class of each data are set in the data list 32 is illustrated. However, the present invention is not limited to this, and the data amount of each data for each communication class may be calculated by a predetermined mathematical expression or a conditional expression. Also at this time, a predetermined mathematical expression, a conditional expression, and parameters used for the mathematical expression and the conditional expression may be set in the data list. Thereby, the improvement of the design freedom of a communication system comes to be aimed at.

  In the above-described embodiment, the case where only the position data is adjusted in the data list 32 is illustrated. However, the present invention is not limited to this, and the type of data whose data amount is adjusted may be other than position data. The type of data to be adjusted may be one type or a plurality of types. As a result, the range in which the amount of data can be adjusted in the communication system can be expanded.

  In the above embodiment, the case where vehicle data acquired from various sensors is transmitted to the service server 41 has been illustrated. However, the present invention is not limited thereto, and the vehicle data may be information other than that acquired from the sensor, for example, information such as a result of information processing by the ECU or security information. Thereby, the application range of a communication system can be expanded.

  In the above embodiment, the case where a service server is connected to the network 40 has been illustrated. However, the present invention is not limited to this, as long as it is a device that can communicate information with a vehicle such as a service server, in addition to the server device, there are a personal computer, a portable information terminal, a failure diagnosis device, and the like. It may be connected to a network. Thereby, the improvement of the design freedom of a communication system comes to be aimed at.

  In the above embodiment, the case where the data group is transmitted from the vehicle 20 to the first service server 41 is illustrated. However, the present invention is not limited to this, and the data group may be transmitted from the service server to the vehicle. Also at this time, the data amount of the communication data transmitted by the service server can be adjusted to the data amount corresponding to the transmission rate. As a result, the application range of the communication system can be expanded.

  In the above embodiment, the case where the vehicle 20 is an automobile is illustrated. However, the present invention is not limited to this, and the information processing apparatus may be provided in a moving body other than an automobile vehicle, for example, a ship, a railway, an industrial machine, a robot, or the like. Thereby, the application range of the communication system including the information processing apparatus can be expanded.

  DESCRIPTION OF SYMBOLS 10 ... Connection server, 11 ... Network communication apparatus, 12 ... Vehicle communication apparatus, 20 ... Vehicle, 21 ... In-vehicle communication apparatus, 22 ... Communication information processing part, 23 ... GW (gateway), 24-27 ... ECU, 30, 31 ... Service, 32, 32A, 32B, 33, 33A, 33B ... Data list, 40 ... Network, 41, 41A, 41B ... First service server, 42, 42A, 42B ... Second service server, 43 ... Transmission Table server, 221 ... Data buffer unit, 222 ... Data organization unit, 223 ... Data reception unit, 224 ... Table management unit, 225 ... Storage unit, 226 ... Organization data management unit, 227 ... Data transmission unit, 228 ... Transmission time calculation , 229 ... correspondence list, 241 ... GPS sensor, 251 ... speed sensor, 261 ... accelerator pedal sensor, 262 ... Rake pedal sensor, 271 ... steering sensor.

Claims (12)

A communication system that performs communication of a data group including a plurality of types of data via a communication line between a communication device mounted on a mobile body and an external device outside the mobile body,
A transmission amount calculation unit for calculating a data transmission amount of the communication line based on a transmission state of data via the communication line;
Creation of adjusting the data amount of each data constituting the data group to a data amount corresponding to the calculated data transmission amount, and creating a data group to be communicated based on the data of the adjusted data amount And
A communication unit comprising: a transmission unit that transmits the data group created by the creation unit via the communication line. The communication system according to claim 1, wherein the creation unit adjusts a data amount of a part of each data constituting the data group to a data amount corresponding to the data transmission amount. The communication according to claim 1 or 2, wherein the creation unit sets each data constituting the data group for each transmission purpose, and adjusts the data amount of the set data according to the calculated data transmission amount. system. The communication system according to any one of claims 1 to 3, wherein the creation unit includes the creation unit, and the creation unit creates a data group to be transmitted from the mobile body to the external device. A holding unit that holds the data amount of each data corresponding to the data transmission amount of the communication line calculated by the transmission amount calculation unit;
The creation unit selects a data amount of each data corresponding to the calculated data transmission amount from the holding unit, and creates the data group to be transmitted based on the data amount of each selected data. The communication system as described in any one of -4. The created data group is composed of a combination of types of data determined according to the data transmission purpose,
The communication system according to claim 5, wherein the holding unit holds a data amount of each data corresponding to the calculated data transmission amount for each transmission purpose. An electronic signature is associated with the data amount of each data held in the holding unit according to the transmission purpose, according to the transmission purpose,
When the creation unit verifies that the electronic signature associated with the data amount of each piece of data held separately for the purpose of transmission selected from the holding unit is valid, the data amount of each piece of selected data The communication system according to claim 6, wherein the data group to be transmitted is created based on the communication data. The communication system according to any one of claims 5 to 7, wherein the holding unit is provided in a moving body. The said holding | maintenance part acquires the data amount of each data corresponding to the said calculated data transmission amount from the external apparatus which is the transmission destination of those data, and hold | maintains them. Communications system. The communication system according to any one of claims 1 to 9, wherein the transmission amount calculation unit calculates a data transmission amount of the communication line every time a data group is transmitted. The communication system according to any one of claims 1 to 10, wherein the transmission unit lengthens a transmission interval of the data group according to a decrease in the data transmission amount calculated by the transmission amount calculation unit. A communication method in a communication system for performing communication of a data group including a plurality of types of data via a communication line between a communication device mounted on a mobile body and an external device outside the mobile body,
The data transmission amount of the communication line is calculated based on the transmission state of the data via the communication line, and the data amount of each data constituting the data group is adjusted to the data amount corresponding to the calculated data transmission amount. And creating a data group to be communicated based on the adjusted data amount data, and transmitting the created data group via the communication line.

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