WO2019043855A1 - Data transmission device, data processing system, and data transmission method - Google Patents

Abstract

Provided are a data transmission device, a data processing system, and a data transmission method with which the amount of data transmitted over a network can be reduced, thereby reducing data transmission delays. Upon acquiring measurement data acquired by sensors, new measurement data is selected from among the measurement data, and the new measurement data is transmitted to a data processing server in such a manner that the data processing server completes the reception of the new measurement data before the data processing server reaches the time to execute analysis processing.

Description

Data transmission apparatus, data processing system and data transmission method

The present invention relates to a data transmission apparatus and a data transmission method for transmitting measurement data acquired by a sensor to a data processing server. The present invention also relates to a data processing system including a data transmission device that transmits measurement data acquired by a sensor to a data processing server.

A plurality of devices may be networked in order to transmit and receive data between a plurality of devices such as a sensor that acquires measurement data and a data processing server that analyzes the measurement data.
Since there is a limit to the amount of data that can be sent per unit time on the network, when data with an amount of data exceeding the limit is to be sent, sending of data may occur, such as waiting for transmission for some data. Will be delayed.

When waiting for transmission of data occurs, the transmission cycle of data transmitted on the network is predicted to prioritize transmission of high priority data on the system such as information related to safety, and transmission cycle There is a data transmission apparatus which delays transmission of low priority data in advance when transmission of high priority data is predicted based on the above (for example, Patent Document 1).

International Publication No. 2010/079538

The conventional data transmission apparatus as described above makes it possible to transmit data according to priority, and transmits data with high priority without waiting, but waits for transmission of data with low priority. It did not reduce the time, and as a whole, could not suppress the transmission delay.
The present invention has been made to solve the problems as described above, and it is possible to reduce the amount of data transmitted between devices, and to suppress the delay of data transmission, a data transmission device, a data processing system, and data The purpose is to provide a transmission method.

A data transmission apparatus according to the present invention comprises a data receiving unit for receiving measurement data acquired by a sensor, a measurement data storage unit for storing measurement data received by the data receiving unit, and measurement data stored in the measurement data storage unit. The measurement data analysis processing timing is reached in the transmission data selection unit that selects new measurement data from among the above and the data processing server that analyzes measurement data at intervals longer than the interval at which the data reception unit receives measurement data. And a data transmission unit for transmitting new measurement data to the data processing server so that the data processing server completes reception of the new measurement data selected by the transmission data selection unit.

Further, a data processing system according to the present invention is connected to the data transmission device described above and the data transmission device, acquires measurement data, and transmits the measurement data to the data transmission device, and is connected to the data transmission device And a data processing server that receives measurement data from the data transmission apparatus, analyzes the measurement data, and distributes a result of the analysis processing.

In the data transmission method according to the present invention, the sensor selects a new measurement data from the acquired measurement data, and the data processing performs analysis processing of the measurement data at an interval longer than an interval at which the sensor acquires the measurement data. Sending selected new measurement data to the data processing server such that the data processing server completes receipt of the new measurement data before the timing of analysis processing of the measurement data at the server is reached. It is.

According to the present invention, the measurement data selected as the new measurement data is transmitted to the data processing server so that the data processing server completes reception of the new measurement data before reaching the analysis processing timing of the data processing server. As a result, the amount of data transmitted on the network can be reduced, and the delay of data transmission can be suppressed.

It is a block diagram which shows the structure of the data processing system which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the data transmission apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the hardware constitutions for implement | achieving the data transmission apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the processing content from acquisition of the measurement data by the sensor in the data processing system which concerns on Embodiment 1 of this invention to the temporary preservation | save of the measurement data by a data transmission apparatus. It is a flowchart which shows the processing content from reading of the measurement data temporarily stored by the data transmission apparatus in the data processing system concerning Embodiment 1 of this invention to the delivery of the result of the analysis processing to the vehicle by a radio | wireless machine. It is a figure which shows the outline | summary of the measurement data which was acquired by the sensor of the data processing system which concerns on Embodiment 1 of this invention, and was packetized by the packetization apparatus. It is a flowchart which shows the processing content of a transmission source check part, a data number check part, and a packet coupling part when the data transmission apparatus which concerns on Embodiment 1 of this invention receives the packet which is measurement data. It is a flowchart which shows the processing content of a packet filter part when the data transmission apparatus which concerns on Embodiment 1 of this invention receives the packet which is measurement data. The packets received by the data transmission apparatus according to the first embodiment of the present invention are combined, and a part of the combined packets is selected at a transmission timing corresponding to the analysis processing timing of the server apparatus and transmitted to the server apparatus. It is a conceptual diagram showing that. It is explanatory drawing which shows the example of the transmission timing information memorize | stored in the transmission period table which the data transmission apparatus which concerns on Embodiment 1 of this invention has, and the maximum transmission information number. It is a block diagram which shows the structure of the data transmission apparatus of Embodiment 2 of this invention. It is a block diagram which shows the structure of the data transmission apparatus of Embodiment 3 of this invention. It is a figure which shows the timing which delivers the analysis process of measurement data to each radio | wireless machine in Embodiment 3 of this invention.

The present invention transmits new measurement data from the measurement data to the data processing server so that the data processing server completes reception of new measurement data before the data transmission apparatus reaches the analysis processing timing of the data processing server. It is
An embodiment of a data transmission apparatus according to the present invention will be described with reference to the drawings.

Embodiment 1

FIG. 1 is a block diagram showing a configuration of a data processing system 2 according to Embodiment 1 of the present invention.
The data processing system 2 includes a data transmission device 1, two sensors 201 and 202, two packetizing devices 203 and 204, a server device 3, and two radios 205 and 206. The sensors 201 and 202 are connected by wire to the data transmission device 1 via the packetizing devices 203 and 204, and the server device 3 and the wireless devices 205 and 206 are connected by wire to the data transmission device 1. ing. Thus, data can be transmitted and received among the data transmission device 1, the sensors 201 and 202, the packetizing devices 203 and 204, the server device 3, and the wireless devices 205 and 206.
The data processing system 2 is for distributing information on road conditions to vehicles. The sensors 201 and 202 are installed on the road and acquire measurement data on the road condition. The server device 3 analyzes the measurement data acquired by the sensors 201 and 202 to derive information on the road condition. The wireless devices 205 and 206 distribute information on the road condition obtained by the analysis processing to the vehicle. In this data processing system 2, for example, when the sensors 201 and 202 are installed at points where it is difficult for the driver to visually check, such as junctions of roads or curves with shields, congestion occurs at the same points or When there is a falling object, information such as traffic congestion or falling object is distributed to each vehicle to support driving. As another example, automatic driving support is performed by distributing information on the road conditions at points that can not be grasped by the on-vehicle sensor to the autonomous driving vehicle.

Each of the data transmission device 1, the sensors 201 and 202, the packetizing devices 203 and 204, the server device 3, and the wireless devices 205 and 206 that constitute the data processing system 2 will be described with reference to FIG. 1.

The data transmission device 1 receives the measurement data acquired by the sensors 201 and 202 and packetized by the packetizers 203 and 204.
Further, when the data transmission device 1 reaches the transmission timing corresponding to the analysis processing timing of the server device 3, the data transmission device 1 transmits a part of the received measurement data to the server device 3. The transmission timing and the details of the measurement data to be transmitted will be described later together with the detailed description of the data transmission apparatus 1.
Thereafter, analysis processing of measurement data is performed by the server device 3, and the data transmission device 1 receives the result of analysis processing from the server device 3.
Further, the data transmission device 1 distributes the result of the analysis processing received from the server device 3 to the wireless devices 205 and 206.

The sensors 201 and 202 are millimeter wave radars installed on the periphery of a road, for example, the side wall of an expressway or a traffic light on a general road. The millimeter waves output from the sensors 201 and 202 are reflected by an object such as a vehicle, a person, or a falling object on the road. The sensors 201, 202 acquire the reflected millimeter waves and transmit them to the packetizers 203, 204 as measurement data.
The sensors 201 and 202 also transmit measurement timing information indicating measurement timing at which the measurement data is acquired, to the packetizers 203 and 204 together with the measurement data.
The measurement by the sensors 201 and 202 is repeated, and the measurement data and the measurement timing information are transmitted to the packetizer 203 and 204 for each measurement. The interval of measurement by the sensors 201 and 202 and the transmission of measurement data is set shorter than the interval of analysis processing on the measurement data of the server device 3.
Further, the sensors 201 and 202 assign CAN-ID (Controller Area Network-Identifier) to the measurement data, and transmit the measurement data together with the measurement data to the packetizers 203 and 204. The CAN-ID is assigned a relevant number for each measurement timing, for example, a serial number is given to a data group measured at a certain time in the same sensor.
Here, the measurement timing is represented by a time when measurement data is acquired or an elapsed time from a reference time to a time when measurement data is acquired. Further, the measurement timing may indicate the relationship between the acquired measurement data and the acquired measurement data. For example, the measurement data can be represented by attaching numbers in sequential order of acquisition. That is, the measurement timing information is represented by information indicating the time and elapsed time, and the relationship between measurement data and the like.
The sensors 201 and 202 correspond to the sensor according to the present invention.

The packetizers 203 and 204 are connected to the sensors 201 and 202, respectively, and when the measurement data is received from the sensors 201 and 202, they are divided into a plurality of packets, recording measurement timing information in a header, and Send. Further, in the header, besides the measurement timing information, a transmission source address as information of the transmission source sensors 201 and 202 and a destination address as information of a transmission destination of data such as the server device 3 are recorded together.

The server device 3 receives the measurement data from the data transmission device 1, performs analysis processing, and derives information on road conditions as a result of the analysis processing. In the analysis process, the object is extracted from the measurement data acquired by the sensors 201 and 202, the type of the object is recognized, the position of the object and the measurement timing are associated and derived, the object or the road This includes the forecasting of the situation in the future. In the present embodiment, the server device 3 extracts the information (for example, the shape) of the object on the road by analysis processing from the measurement result by the millimeter wave radar, and the object is either a vehicle, a person or a falling object. Recognize In addition, information such as the position and number of objects is also extracted, and as a result of analysis processing, information on the road condition is derived.
In addition, the server device 3 distributes information related to road conditions as a result of analysis processing to the wireless devices 205 and 206 via the data transmission device 1.
The server device 3 corresponds to a data processing server according to the present invention.

The wireless devices 205 and 206 are installed in or around the measurement area of the sensors 201 and 202, respectively, and deliver data such as the result of analysis processing of the server device 3 to a vehicle existing in the vicinity of the measurement area. is there.

Next, the data transmission device 1 will be described in detail with reference to FIG.

FIG. 2 is a block diagram showing the configuration of the data transmission apparatus 1 according to Embodiment 1 of the present invention.
The data transmission apparatus 1 includes a packet reception unit 4, a transmission source check unit 5, a data number check unit 6, a packet combination unit 7, a packet filter unit 8, a transmission packet determination unit 9, a packet transmission unit 10, a memory unit 11, and a transmission cycle. The table 12, the condition table 13, and the corresponding wireless device table 14 are provided.
Each configuration will be described below.

The packet receiver 4 receives packets of measurement data from the packetizers 203 and 204.
The packet receiver 4 corresponds to the data receiver of the present invention.

The transmission source check unit 5 extracts the transmission source address recorded in the header of the packetized measurement data received by the packet reception unit 4 and identifies the sensors 201 and 202 as transmission sources.
In the corresponding wireless device table 14, sensors 201 and 202 and wireless devices 205 and 206 for distributing results of analysis processing of measurement data acquired by the sensors 201 and 202 to a vehicle are stored in association with each other. . By distributing the road conditions measured by a certain sensor to the vehicles present in the vicinity, it leads to driving assistance etc. Therefore, the radio installed in or around the measurement area of the sensor analyzes the measurement data of the sensor It becomes a wireless device that delivers the processing result. Note that one sensor may be associated with one wireless device, or a plurality of sensors may be associated with one wireless device.
The transmission source check unit 5 identifies the sensors 201 and 202 that are transmission sources of the measurement data, refers to the corresponding wireless device table 14, and the analysis processing result derived by the server device 3 based on the measurement data of the sensor is It is determined to which radio the radio is to be distributed, and information about the radio corresponding to the measurement data is recorded in the header of the packet of the measurement data.

The data number check unit 6 identifies the CAN-ID of CAN data in the packet output from the transmission source check unit 5.
The packet combining unit 7 uses the CAN-ID identified by the data number check unit 6 to select, among the plurality of packets received by the data transmission apparatus 1, a packet group related to measurement data acquired by the same sensor at the same time. Combine into one packet or reorganize into a plurality of consecutive packets. Details of the process of combining and reorganizing this packet will be described later.

The packet filter unit 8 performs filter processing on the packet output from the packet combining unit 7 and data in the packet. The filtering process is for reducing the data volume of measurement data by deleting low importance or unnecessary packets in analysis processing and low importance or unnecessary data in packets.
The packet subjected to the filtering process by the packet filter unit 8 is stored in the memory unit 11. Here, in the packet stored in the memory unit 11, the measurement timing information recorded in the header together with the measurement data, the information on the corresponding radios 205 and 206, the information on the sensors 201 and 202 as the transmission source, and the information on the destination included.
The conditions of the filtering process and the process contents are stored in the condition table 13, and when there is an abnormality in the data of the reflected wave of the millimeter wave radar (for example, when there is data regarding reflection from the position at which the distance to the sensor is zero) If there is data without change from the data of the reflected wave measured at the immediately preceding time with reference to the measurement data stored in the memory unit 11, deleting the same data can be given as an example of conditions and processing contents .

The memory unit 11 temporarily stores the packet of measurement data output from the packet filter unit 8. Also, the packet of the measurement data is output to the transmission packet determination unit 9 or the like.
Also, in the memory unit 11, after the packet reception unit 4 receives the measurement data, the transmission source check unit 5, the data number check unit 6, the packet combination unit 7, and the packet filter unit 8 process the measurement data. In the meantime, it also has a function as a sub memory that temporarily stores the measurement data being received and processed, and the packet reception unit 4, the transmission source check unit 5, the data number check unit 6, and the packet combination unit 7 At each processing stage of the packet filter unit 8, measurement data is stored as appropriate, and processing is in progress.
The memory unit 11 corresponds to the measurement data storage unit of the present invention.

The transmission packet determination unit 9 refers to the transmission timing stored in the transmission cycle table 12 and reads the measurement data from the memory unit 11 when judging that the current time or the elapsed time from the reference time has reached the transmission timing. The measurement data to be transmitted to the server device 3 are selected.
The transmission cycle table 12 stores transmission timing information indicating transmission timings of measurement data corresponding to analysis processing timing at which the server device 3 performs analysis processing. Since the analysis process is performed at the analysis process timing determined for each of the wireless devices 205 and 206 distributing the result, the transmission timing information is prepared for each wireless device.
For example, when the transmission timing corresponding to the wireless device 205 arrives, the transmission packet determination unit 9 refers to the information related to the wireless device recorded in the header of the packet stored in the memory unit 11, and transmits from the memory unit 11 to the wireless device 205. Read all packets corresponding to. The measurement timing information recorded in the header of the read packet is extracted, and a new measurement timing packet to be transmitted is selected from all the read packets.
Here, the packet of the new measurement timing is a packet of the measurement timing closer to the current time or shorter in elapsed time when the measurement timings recorded in the read packet are compared. That is, in the present embodiment, the transmission packet determination unit 9 selects a packet including the latest measurement data.
As described above, since the information on the wireless devices 205 and 206 recorded in the header of the packet by the transmission source check unit 5 corresponds to the sensors 201 and 202 that are transmission sources, the transmission packet determination unit 9 The packet corresponding to one wireless device read out from the unit 11 is one acquired by at least one identical sensor.
When one sensor corresponds to one radio, the packet corresponding to one radio read includes only the packet acquired by the same sensor. In this case, the transmission packet determination unit 9 selects a packet of a new measurement timing from all the read packets (packets acquired by the same sensor).
When a plurality of sensors correspond to one wireless device, the packet corresponding to the one wireless device read includes packets acquired by the plurality of sensors. In this case, the transmission packet determination unit 9 refers to the sensor information recorded in the header of the packet, and selects a new measurement timing packet for each packet of measurement data acquired by the same sensor.
The transmission packet determination unit 9 corresponds to the transmission data selection unit of the present invention, and the transmission cycle table 12 corresponds to the transmission timing storage unit of the present invention.

Here, the analysis processing timing is a time when the server device 3 starts the analysis processing or an elapsed time from a reference time. The transmission timing is a time when the data transmission apparatus 1 starts transmission processing or an elapsed time from a reference time. The transmission process includes the process from the start of reading the packet to be transmitted from the memory unit 11 to the completion of the packet transmission of the data transmission apparatus 1. Therefore, the transmission timing in the present embodiment is the time when the data transmission apparatus 1 (more specifically, the transmission packet determination unit 9) starts reading the packet from the memory unit 11 or the elapsed time from the reference time.

Further, in order to finish receiving the measurement data before the server device 3 starts the analysis process, the data transmission device 1 needs to start the transmission process a predetermined time or more before the analysis process timing. The fixed time is the time required for the server device 3 to complete reception of data after the data transmission device 1 starts the data transmission process, and from when the data transmission device 1 reads out the packet to be transmitted until transmission The time obtained by adding the time of (in this embodiment, the time of the selection process of the transmission packet determination unit 9) and the time of the data reception process of the server device 3 is added.
Therefore, the transmission timing corresponding to the analysis processing timing is a time traced back to a predetermined time or more from the analysis processing timing or an elapsed time from the reference time such that the measurement data is received before the server apparatus 3 starts the analysis processing. It is set as time.

The packet transmission unit 10 receives the packet selected by the transmission packet determination unit 9 and transmits the packet to the server device 3. Since the transmission timing is set as a time which is traced back to a predetermined time or more from the analysis processing timing or an elapsed time from a reference time, the packet transmission unit 10 receives the server apparatus 3 before the analysis processing timing of the server apparatus 3 is reached. The packet will be sent to complete the reception of the packet.
Here, it is stated that the server device 3 transmits a packet so as to complete reception of the packet before reaching the analysis processing timing, but in order to realize this, the time when the server device 3 completes reception of the packet, reference The transmission timing may be set so that the elapsed time from the time point coincides with the analysis processing timing, but the transmission timing may be set so that the reception is completed before the analysis processing timing. When the transmission timing is set so that reception is completed before the analysis processing timing, the difference between the analysis processing timing and the time for packet reception completion is shorter than the measurement cycle of the sensor that acquired the measurement data to be analyzed. You should set it to be If the time deviation is longer than the measurement period of the sensor, new measurement data may be acquired after the reception of the packet is complete, and the selected measurement data may not be the latest one.
The packet transmitter 10 corresponds to the data transmitter of the present invention.

By starting the transmission process at the transmission timing corresponding to the analysis process timing as described above, the server device 3 completes the reception of the selected measurement data before the analysis process timing is reached. The measurement data is to be transmitted to the server device 3.

FIG. 3 is a block diagram showing a hardware configuration for realizing the data transmission apparatus 1 according to the first embodiment of the present invention.

In FIG. 3, the data transmission apparatus 1 is realized by Ethernet (registered trademark) interfaces 104 and 106, a packet processing processor 105, and a memory 107.
The Ethernet interfaces 104 and 106 transmit and receive data in communication with the packetizing devices 203 and 204, the wireless devices 205 and 206, and the server device 3. The packet receiving unit 4 and the packet transmitting unit 10 in the data transmission apparatus 1 are realized by the Ethernet interfaces 104 and 106.
A program describing the processing of the transmission source check unit 5, the data number check unit 6, the packet combination unit 7, the packet filter unit 8 and the transmission packet determination unit 9 in the data transmission apparatus 1 and the operation content is stored in the memory 107, The packet processor 105 implements these functions by reading and executing those programs.
In the memory 107, a transmission cycle table 12, a condition table 13, and a corresponding wireless device table 14 are stored, and are appropriately referred to by the packet processing processor 105 at the time of the above processing and calculation.
Also, the measurement data received by the Ethernet interface 104 and processed by the packet processing processor 105 is temporarily stored in the memory 107, whereby the function of the memory unit 11 is realized.
The packet receiving unit 4, the transmission source checking unit 5, the data number checking unit 6, the packet combining unit 7, the packet filter unit 8, the transmission packet determining unit 9, and the packet transmitting unit 10 of the data transmission device 1 are each dedicated hardware. (For example, a semiconductor integrated circuit on which a CPU is mounted, or a one-chip microcomputer or the like) may be used.

Next, the operation of the data transmission device 1 and the data processing system 2 according to the first embodiment of the present invention and the details of the processing content will be described with reference to FIG. 4 to FIG.
First, the operation of the data processing system 2 including the data transmission device 1 will be described using FIGS. 4 and 5.

FIG. 4 is a flowchart showing processing contents from acquisition of measurement data by the sensors 201 and 202 in the data processing system 2 to temporary storage of the measurement data by the data transmission apparatus 1.
The start cycle of this flow, that is, the measurement cycle of data is determined by factors such as the response performance of the sensors 201 and 202, the processing performance of the packetizing devices 203 and 204 and the data transmission device 1, and Factors such as the needs of the vehicle that receives the distribution of the processing result are also taken into consideration and appropriately determined. A cycle shorter than at least the analysis processing cycle of the measurement data of the server device 3 is used.

First, the sensors 201 and 202 installed around the road acquire measurement data on the road condition, and transmit the measurement data to the packetizers 203 and 204 (step S001).

Next, the packetizers 203 and 204 divide the measurement data received from the sensors 201 and 202 into packets. The packetized measurement data is transmitted to the data transmission apparatus 1 (step S002).

Next, the data transmission device 1 receives the packetized measurement data from the packetizing devices 203 and 204, performs a plurality of processes on the packet, and stores the packet in the memory unit 11 (step S003). The plurality of processes will be described later with reference to another flow.
As described above, the measurement data acquired by the sensors 201 and 202 are sequentially stored in the data transmission device 1.

FIG. 5 is from the reading of the measurement data temporarily stored in the data transmission apparatus 1 in the data processing system 2 according to the first embodiment of the present invention to the distribution of the result of the analysis processing to the vehicle by the wireless devices 205 and 206. It is a flowchart which shows the processing content of.
This flow is started when the transmission time included in the transmission timing information stored in the transmission cycle table 12 reaches the current time or the elapsed time from the reference time. More specifically, the transmission packet determination unit 9 appropriately refers to the transmission timing information stored in the transmission cycle table 12 and compares it with the time information held by the data transmission apparatus 1 to indicate that the transmission timing has been reached. Determine and start the step of reading the measurement data.
Here, the time information is information on the current time held by the data transmission apparatus 1 or information on an elapsed time from the time to be a reference.

The data transmission apparatus 1 reads all packets related to measurement data used for deriving information on the road condition to be distributed to the same wireless device among the packets stored in the memory unit 11 in step S003 in FIG. 4 (step S004) ).

The data transmission apparatus 1 extracts the measurement timing information and the information on the sensor included in each of the read packets, and selects a new measurement timing packet from among the measurement data packets acquired by the same sensor (step S 005). ).

The data transmission device 1 transmits the packet selected in step S005 to the server device 3 (step S006).

The server device 3 analyzes the measurement data contained in the received packet, derives information on the road condition, and distributes it to the corresponding wireless device (step S 007).

The wireless devices 205 and 206 distribute information on the road condition received from the server device 3 to the surrounding vehicles (step S008).

Next, with respect to a plurality of processes (processes before data storage in step S003 in FIG. 4) when the data transmission apparatus 1 receives the measurement data packetized in the packetizing apparatuses 203 and 204, FIGS. It demonstrates using.

First, a packet of measurement data to be subjected to a plurality of processes will be described.
FIG. 6 is a diagram showing an outline of measurement data obtained by the sensors 201 and 202 of the data processing system 2 according to the first embodiment of the present invention and packetized by the packetizers 203 and 204.
The four data shown in FIG. 6 are four measurement data packets packetized by the packetizers 203 and 204. Each packet is a packet of a predetermined size, and includes a header and a plurality of CAN data. CAN data is obtained by dividing measurement data.
Two packets shown on the left side of FIG. 6 are data measured at the time T1 by the same sensor, and in this example, 1 to 4 are attached as CAN-ID to CAN data in the packet. The CAN-ID indicating the last CAN data measured at the same time by the same sensor is determined in advance. Here, the CAN data with CAN-ID = 4 is the same as the last measured data at the same time. The CAN-ID is assigned to The two packets shown on the right side of FIG. 6 are data measured at time T2, and CAN-ID is assigned from 1 to 4 as in the above example, and CAN-ID = 4-added CAN The data is the last measured data. A transmission source address, measurement timing information, a destination address and the like are recorded in the header as information on the transmission source sensors 201 and 202.

Next, a plurality of processing contents described above for the packet of measurement data described using FIG. 6 will be described using FIG.
FIG. 7 is a flowchart showing the processing contents of the transmission source check unit 5, the data number check unit 6, and the packet combination unit 7 when the data transmission apparatus 1 according to the first embodiment of the present invention receives a packet as measurement data. It is.
In the present embodiment, this flow is started when the packet reception unit 4 of the data transmission apparatus 1 receives the leading packet of measurement data.

When the packet reception unit 4 of the data transmission device 1 receives the leading packet, the transmission source check unit 5 refers to the header of the packet to extract sensor information, and refers to the corresponding wireless device table 14 to be the transmission source sensor 201 , 202 and the wireless devices 205 and 206 corresponding to the wireless communication device 202 (step S101).

The transmission source check unit 5 records the information on the identified wireless devices 205 and 206 in the header of the packet (step S102).

The above is the transmission source check processing performed by the transmission source check unit 5, and next, the combination processing by the data number check unit 6 and the packet combination unit 7 is performed.

The data number check unit 6 deletes the header from the packet and extracts CAN data. At this time, information on the deleted packet is separately stored in the memory unit 11 (steps S103 and S104). As described above, the packet contains a plurality of CAN data (see FIG. 6).

The data number check unit 6 determines whether the CAN-ID of the extracted first CAN data is 4 (step S105). If it is 4 (in the case of YES), the CAN data is the last measurement data Because of this, the packet combining unit 7 combines the CAN data into a packet again, adds information of the packet stored separately as a header, and ends the processing (step S106).

If the CAN-ID of the first CAN data is not 4, it is determined whether this CAN data is the last CAN data in the packet, that is, there are no other packets in the packet (step S107) and not the last CAN data In the case (NO), steps S104 and S105 are repeated until there is no other packet in the packet or the CAN data of CAN-ID 4 is found.

If the CAN-ID of all CAN data in the packet is not 4 (in the case of YES at step S107), the next packet is received (step S108), and the header of the next packet is the same as the processing for the first packet. Deletion, information holding (step S109), and extraction of CAN data (step S110).

The data number check unit 6 determines whether the CAN-ID of CAN data extracted from the next packet is 4 (step S111). If it is 4 (in the case of YES), the CAN data is the last Since it becomes measurement data, the packet combining unit 7 combines the head packet and the next packet, adds the information of the header of the packet stored separately as the header of the combined packet, and ends the processing (step S112). ).
If the CAN-ID of the first CAN data is not 4 (NO in step S111), it is determined whether this CAN data is the last CAN data in the packet, that is, there are no other packets in the packet (step S113), if it is not the last CAN data (in the case of NO), steps S110 and S111 are repeated until there is no other packet in the packet or the CAN data with CAN-ID 4 is found.
If the CAN-ID of all CAN data in the packet is not 4 (if YES at step S113), the next packet is received again (step S108), and the same processing is repeated, and the CAN with CAN-ID 4 is received. If data is found, all packets are combined and added with a header (step S112).

FIG. 8 is a flowchart showing the processing contents of the packet filter unit 8 when the data transmission apparatus 1 according to the first embodiment of the present invention receives a packet that is measurement data.
In the present embodiment, the flow shows that the packet filter unit 8 receives a packet (including a combined packet) processed by the transmission source check unit 5, the data number check unit 6, and the packet combining unit 7 in FIG. When it starts.
FIG. 8 shows an example of filter processing for deleting data as unnecessary data when there is reflection from a position at which the distance from the sensor is zero as a result of measurement by the millimeter wave radar.

The packet filter unit 8 extracts the first CAN data from the packet received from the packet combining unit 7 (step S201). It is determined whether or not there is an area in which the distance to the object is zero in the extracted data (step S202). If the area exists (in the case of YES), the area is an analysis process of the server apparatus 3 The data in the area is deleted (step S203).
If there is no area within the extracted data that has a distance of zero from the sensor (in the case of NO at step S202), the data is not deleted and held (step S204). The packet filter unit 8 determines whether the CAN data processed in S202 to S204 is the last CAN data in the packet (step S205), and processing is completed for all CAN data (YES in step S205) ) Reconstructs the packet from the CAN data which has been subjected to deletion and holding processing (step S206). If the CAN data is not the last CAN data in the packet (NO in step S205), the next CAN data is extracted and the above process is repeated.

The plurality of processes performed by the data transmission apparatus 1 at the time of data storage in step S003 in FIG. 4 have been described above with reference to FIGS. 6 to 8.
Next, the process of reading out the measurement data in step S 004 of FIG. 5 and the process of selecting the data of S 005 will be described in detail with reference to FIGS. 9 and 10.

First, the process of the transmission packet determination unit 9 reading measurement data and selecting new measurement data will be described in detail with reference to FIG.
In FIG. 9, packets a1, a2, a3, and a4 received by the data transmission apparatus 1 according to the first embodiment of the present invention are combined, and a part of the combined packets is analyzed by the server apparatus 3 at the timing of analysis processing. It is a conceptual diagram which shows that it is selected by corresponding transmission timing, and is transmitted to the server apparatus 3. FIG. The horizontal axis represents time.

As shown in the lower part of FIG. 9, the packet receiving unit 4 of the data transmission device 1 sequentially receives a plurality of packets a1, a2, a3 and a4 from the packetizing devices 203 and 204. Here, a is information indicating the sensors 201 and 202 of the transmission source, in other words, the wireless devices 205 and 206 that distribute the result of analysis processing, and are stored in the header of the packet. The packets in FIG. 9 are all labeled with a, indicating that they are all received from the same sensor. In addition, numerals 1 to 4 described after a are measurement timing information indicating measurement timing, and in the case of the same numerals, indicate data measured simultaneously.

As described with reference to FIG. 7, packets of data measured by the same sensor at the same time are combined by the packet combining unit 7 to generate combined packets A 1, A 2, A 3, A 4 and stored in the memory unit 11. (FIG. 9, middle row).

As described with reference to FIG. 5, all packets for which the wireless device to which the analysis processing result is distributed are the same are all read by the transmission packet determination unit 9. The transmission timing shown in the upper part of FIG. 9 is the transmission timing corresponding to the analysis processing timing of the server device 3, and among the packets read at the transmission timing, new measurement data (packet) is selected, and the server It is sent to the device 3. For example, in FIG. 9, at the transmission timing on the left side, the packet has only A1 and A1 is selected and transmitted as a transmission target. Thereafter, the transmitted packet A1 is deleted. At the transmission timing on the right side, packets A2 to A4 are read out, and among them, the latest packet A4 is selected and transmitted to the server device 3. The transmitted packet A4 and the packets A2 and A3 not selected are deleted. The symbol “x” in the drawing indicates that the packet is not selected by the transmission packet determination unit 9.

Here, at the transmission timing on the left side shown in the upper part of FIG. 9, a part of the packet a2 is already received by the data transmission apparatus 1, but at the transmission timing, all the packets a2 are not complete. The packet A2 is not generated. In this case, part of the combined packet A2 and the packet a2 is not selected as a new packet, and the previous packet A1 is transmitted to the server 3 as a new packet. That is, the transmission packet determination unit 9 selects a new packet from among measurement data in which all packets of data measured by the same sensor at the same time are present.

The number of new measurement data to be selected when the transmission packet determination unit 9 according to the first embodiment of the present invention performs the selection will be described with reference to FIG.

FIG. 10 shows an example of the transmission timing information and the maximum number of transmission information stored in the transmission cycle table 12 of the data transmission apparatus 1 according to the first embodiment of the present invention. Times T10, T20, and T30, which are next transmission timings, are stored for each wireless device. In addition, the maximum transmission information number which is the maximum number of new measurement data to be transmitted for each wireless device is stored. The transmission packet determination unit 9 refers to the transmission cycle table 12 to select measurement data to be transmitted.

In the data selection in step S005 of FIG. 5, the transmission packet determination unit 9 refers to the maximum number of transmission information items in the transmission cycle table 12 to select new measurement data having the number corresponding to the maximum transmission information number. Specifically, a packet corresponding to one or more measurement data is selected. The maximum number of transmission information items corresponding to the radio # 1 in the transmission cycle table 12 of FIG. 10 is 2, and the transmission packet determination unit 9 measures two new measurements for each sensor at the transmission timing corresponding to the radio # 1. The data is selected, and the packet transmitter 10 transmits the two new measurement data. At this time, the transmission packet determination unit 9 compares the measurement timings of the read measurement data, and selects two measurement data closer to the current time or shorter in elapsed time from the reference time.
If the number of new measurement data that can be selected is less than or equal to the maximum number of transmission information, all of the selected new packets will be transmitted.

The data transmission device 1 and the data processing system 2 according to the first embodiment of the present invention are configured as described above, and provide the following effects.

When the sensors 201 and 202 and the server device 3 are networked as in the first embodiment of the present invention, measurement data from the sensors 201 and 202 are transmitted to the server device 3 via the network. Since the measurement cycle of the sensors 201 and 202 is shorter than the cycle of analysis processing of the server device 3, when transmitting all the measurement data acquired by the sensors 201 and 202 to the server device 3, much measurement data is sent from the sensors 201 and 202 to the server It will be sent to the device 3. Therefore, if the amount of measurement data temporarily exceeds the amount of data that can be transmitted in unit time on the network, transmission may be delayed, such as waiting for transmission of some data.
The data transmission device 1 and the data processing system 2 according to the first embodiment of the present invention only receive new measurement data so that the server device 3 completes reception of new measurement data before the analysis processing timing of the server device 3. Since selection and transmission are performed, the amount of data to be transmitted can be reduced, and delay of data transmission can be suppressed.

In addition, since new measurement data is selected according to the analysis processing timing of the server device 3 instead of simply sorting the measurement data to be transmitted, the analysis processing of the server device 3 can be performed with the new measurement data. It is possible to obtain the result of analysis processing close to

When measurement data is transmitted in a packet format as in the first embodiment of the present invention, when the measurement data is packetized, the break of the measurement data does not necessarily coincide with the break of the packet. In order for the server device 3 to perform appropriate analysis processing, the server device 3 must identify which packet contains one measurement data and perform analysis processing.
In the data transmission device 1 and the data processing system 2 according to the first embodiment of the present invention, the data number check unit 6 checks the CAN-ID contained in the packet to measure the measurement data measured by the same sensor at the same time. The packet combining unit 7 combines packets including one measurement data into one packet or reorganizes them as a continuous packet. Therefore, it is possible to easily identify in which packet one measurement data is included in the server device 3, and to reduce the processing load of the server device 3.

In addition, since the data transmission device 1 and the data processing system 2 according to the first embodiment of the present invention include the packet filter unit 8, the importance of the analysis processing before transmitting the measurement data to the server device 3 Low or unnecessary data can be deleted. As a result, the load associated with the analysis process of the server device 3 can be reduced, and the amount of data to be transmitted can be reduced to suppress the delay of data transmission.

Further, in the data transmission device 1 and the data processing system 2 according to the first embodiment of the present invention, the transmission packet determination unit 9 refers to the maximum number of transmission information items stored in the transmission cycle table 12 and performs one or more new measurements. It is possible to select data and send it to the server device 3.
When the server device 3 predicts the road condition in the future as analysis processing, a plurality of measurement data at different times are required. However, the data transmission device 1 and the data processing system 2 according to the first embodiment of the present invention In this case, it is possible to cope with this by setting the maximum transmission information number to 2 or more as needed. By doing so, even when a plurality of new measurement data are required for the analysis process of the server device 3, it is possible to transmit a plurality of new measurement data while reducing the amount of data to be transmitted. Become.

Further, in the data transmission device 1 and the data processing system 2 according to the first embodiment of the present invention, the measurement data in which all the packets are complete at the transmission timing is read and selected. As a result, it is possible to suppress incomplete measurement data being transmitted and subjected to analysis processing, and to improve the accuracy and reliability of information to be distributed.

Embodiment 2

Next, a second embodiment of the present invention will be described. Descriptions of parts similar to the configuration and operation of the first embodiment will be omitted, and parts different from the first embodiment will be described below.

In the first embodiment of the present invention, the process of storing transmission timing information in the transmission cycle table 12 is performed at the time of installation of the data processing system 2 or the like. In this case, when the analysis processing timing of the server device 3 is changed, such as when a wireless device is newly added, it is necessary to reset the transmission timing information of the transmission cycle table 12. The second embodiment of the present invention shows a data transmission apparatus 21 capable of automatically updating transmission timing information.

FIG. 11 is a block diagram showing the configuration of the data transmission apparatus 21 according to the second embodiment of the present invention. FIG. 11 corresponds to FIG. 2 of the first embodiment, and the same reference numerals are given to the same components.

The data transmission apparatus 21 newly includes a cycle reception unit 22 in the first embodiment, and includes a transmission cycle table 23 instead of the transmission cycle table 12.

The cycle reception unit 22 receives analysis processing timing information indicating analysis processing timing transmitted from the server device 3. Specifically, as analysis processing timing information, information on processing start time and processing cycle of measurement data for each wireless device is received.
The cycle reception unit 22 generates new transmission timing information indicating the new transmission timing of the data transmission apparatus 21 based on the received analysis processing timing information, and updates the transmission timing information of the transmission cycle table 23.
As described in the first embodiment, the generation of the transmission timing information is performed so that the transmission timing is a time traced back to a predetermined time or more before the analysis processing timing or an elapsed time from a reference time.
The cycle reception unit 22 corresponds to the transmission timing update unit of the present invention.

The second embodiment of the present invention is configured as described above, and has the same effects as the first embodiment, as well as the following effects.
The data transmission device 21 and the data processing system 24 according to the second embodiment of the present invention transmit new measurement data so that the server device 3 completes reception of new measurement data before reaching the analysis processing timing of the server device 3. It is to be transmitted, and it is possible to perform analysis processing with high real-time property while reducing the amount of data to be transmitted.
In order to transmit new measurement data so that the server device 3 completes reception of new measurement data before reaching the analysis processing timing, the data transmission device 21 accurately grasps the analysis processing timing of the server device 3 The data transmission apparatus 21 according to the second embodiment of the present invention generates new transmission timing information based on the latest analysis processing timing transmitted from the server apparatus 3 and automatically transmits the transmission timing information. Since updating is possible, it becomes possible to transmit new measurement data at more accurate transmission timing.

Third Embodiment

Next, a third embodiment of the present invention will be described. Descriptions of parts similar to the configuration and operation of the first embodiment will be omitted, and parts different from the first embodiment will be described below.

In the first and second embodiments of the present invention, transmission timing corresponding to the analysis processing timing of the server device 3 is used as the transmission timing information stored in the transmission cycle tables 12 and 23. In order to maintain this correspondence, time synchronization between the server device 3 and the data transmission devices 1 and 21 has to be performed accurately. The third embodiment of the present invention shows a data transmission apparatus 31 capable of transmitting measurement data at transmission timing corresponding to the analysis processing timing of the server apparatus 3 without requiring time synchronization with the server apparatus 3.

FIG. 12 is a block diagram showing the configuration of the data transmission apparatus 31 according to the third embodiment of the present invention. FIG. 12 corresponds to FIG. 2 of the first embodiment, and the same reference numerals are given to the same components.

The data transmission apparatus 31 newly includes a packet type identification unit 32 and a cycle extraction unit 33 in the first embodiment, and includes a transmission cycle table 34 instead of the transmission cycle table 12.

Here, FIG. 13 is a diagram showing the timing of distributing the result of analysis processing to the wireless devices A and B.
As shown in FIG. 13, the analysis processing of the server device 3 for the wireless devices A and B is performed at a constant cycle so as not to overlap with each other, and the delivery of the analysis processing result to each wireless device also does not overlap It is done with a constant cycle.

The packet type identification unit 32 monitors distribution data distributed from the server device 3 to each wireless device, and whether or not it is a packet for vehicle distribution, that is, whether it is wireless device distribution data and to which wireless device Identify what it is.
The packet type identification unit 32 corresponds to the distribution data reception unit of the present invention.

When the packet type identification unit 32 identifies a packet for distribution for vehicles, the cycle extraction unit 33 records the time or the elapsed time from the reference time. The packet is identified several times and sequentially processed to record the elapsed time from the time or reference time, and using the time or elapsed time, the cycle extraction unit 33 distributes the timing from the server device 3 to each wireless device To generate delivery timing information. Specifically, the delivery timing indicates when the result of analysis processing is delivered, and a delivery cycle is obtained based on the identified time of a plurality of packets or the elapsed time from a reference time, and From the time when the packet was actually identified or the elapsed time from the reference time (corresponding to the time when the result of analysis processing was distributed or the elapsed time from the reference time), the delivery timing after the next time is derived.
Here, since the distribution of the result of the analysis processing from the server device 3 to the wireless devices A and B is started when the analysis processing of the server device 3 is completed, the distribution timing to a certain wireless device is It is linked with the analysis processing timing for the wireless device (FIG. 13). Therefore, analysis processing timing information can be generated by subtracting the time for analysis processing required by the server device 3 and the time necessary for distribution processing with respect to the distribution timing.
Also, using the analysis processing timing information, the cycle extraction unit 33 generates transmission timing information whose transmission timing is a time traced back to a predetermined time or more before the analysis processing timing or an elapsed time from a reference time.
The cycle extraction unit 33 updates the transmission timing information of the transmission cycle table 34 using the generated transmission timing information.
The cycle extraction unit 33 corresponds to a distribution timing information generation unit and a transmission timing update unit according to the present invention.

The third embodiment of the present invention is configured as described above, and has the same effects as those of the first embodiment and the following effects.
The data transmission apparatus 31 and the data processing system 35 according to the third embodiment of the present invention can automatically update the transmission timing information as in the second embodiment, so that new measurement data can be transmitted at more accurate transmission timing. Is possible.
Further, in the third embodiment of the present invention, since the analysis processing timing of the server device 3 is determined based on the time information held by the data transmission device 31, the time information of the data transmission device 31 and the server device 3 is synchronized. Even if it does not, it becomes possible to transmit new measurement data at more accurate transmission timing.

The first, second, and third embodiments of the present invention have been described above. Below, the modification of these embodiments is explained.

In the embodiment of the present invention, two examples of the sensor, the packetizer, and the radio have been described, but there may be one or three or more. The number of sensors, packetizers, and radios need not be the same.

Although the millimeter wave radar is used as the sensors 201 and 202 in the embodiment of the present invention, it may be a camera for photographing a road. Although the sensors 201 and 202 are installed around the road, they may be in-vehicle sensors that can communicate.

In the embodiment of the present invention, the measurement data is packetized and transmitted by the packetizing devices 203 and 204. However, if the data can be transmitted, it may not be packetized.

In the embodiment of the present invention, the result of the analysis processing is distributed to the vehicle via the wireless devices 205 and 206, but may be distributed to terminals such as a mobile phone and a tablet.

In the embodiment of the present invention, the transmission packet determination unit 9 reads all measurement data corresponding to the wireless devices 205 and 206 to which the analysis processing result is distributed. However, the measurement timing of the measurement data of the memory unit 11 is measured. With reference to the information and information on the radios 205 and 206, the measurement timing for the same radio may select new measurement data and read out only the selected new measurement data.

In the embodiment of the present invention, the transmission timing information is prepared for each wireless device, but may be prepared for each sensor. Although the transmission packet determination unit 9 reads all measurement data from the memory unit 11 for each wireless device, in this case, measurement data may be read for each sensor.

In the embodiment of the present invention, the measurement timing information indicating the measurement timing at which the sensors 201 and 202 have acquired the measurement data is transmitted to the packetizing devices 203 and 204 together with the measurement data, but the packetizing devices 203 and 204 The measurement timing information may be generated using the time when the measurement data is received, the elapsed time from the reference time, and the pre-post relationship as the measurement timing, and may be recorded in the header and transmitted to the data transmission device 1, 21, 31. Further, measurement timing information may be generated and stored with the time when the data transmission apparatus 1, 21, 31 receives the measurement data, the elapsed time from the reference time, and the pre-post relationship as the measurement timing. When using the time received as described above, the elapsed time from the reference time, and the earlier-after relationship as the measurement timing, the measurement timing is the time when the measurement data was received or the time when the measurement data was received from the reference time. It is expressed by the elapsed time until the end of the measurement data.

In the embodiment of the present invention, when the transmission timing arrives, the transmission packet determination unit 9 reads all packets corresponding to the wireless device 205 from the memory unit 11, selects a new measurement timing packet, and transmits the new packet. Although it is decided to determine the packet, the transmission packet determination unit 9 already stores the received measurement data and the memory unit 11 each time the data transmission devices 1, 21, 31 receive the measurement data from the packetizing devices 203, 204. The new measurement data is selected from among the measurement data being stored, and when the transmission timing arrives, the packet transmission unit 10 reads out the new measurement data that the transmission packet determination unit 9 has selected most recently. You may make it transmit.
In this case, the transmission process of the data transmission apparatus 1, 21, 31 includes the packet transmission process of the packet transmission unit 10, and the transmission timing reads the new measurement data selected by the packet transmission unit 10 from the memory unit 11. It is the elapsed time from the time of day or the reference time.

As described above, when the transmission packet determination unit 9 selects new measurement data each time measurement data is received, new measurement data may be stored in the memory unit 11 and old measurement data may be deleted. That is, measurement data may be overwritten.
The selection by the transmission packet determination unit 9 also includes leaving only new measurement data in the memory unit 11 by such overwriting.

In the embodiment of the present invention, the data transmission devices 1, 21, 31, the sensors 201, 202, the packetizing devices 203, 204, the server device 3, and the wireless devices 205, 206 are connected by wire. However, it may be wireless.

A data transmission device, a data processing system, and a data transmission method according to the present invention transmit measurement data acquired by a sensor via a network to a server device, derive information on road conditions, and deliver the information to a vehicle. Driving support can be provided. Therefore, the present invention can be used in the field of network communication and the field of vehicles.

1, 21, 31 data transmission apparatus, 2 data processing system, 3 server apparatus, 4 packet receiving unit, 5 transmission source checking unit, 6 data number checking unit, 7 packet combining unit, 8 packet filter unit, 9 transmission packet determining unit , 10 packet transmitter, 11 memory, 12, 23, 34 transmission cycle table, 13 condition table, 14 corresponding radio table, 22 cycle receiver, 32 packet type identifier, 33 cycle extractor, 104, 106 Ethernet interface , 105 packet processor, 107 memory, 201, 202 sensor, 203, 204 packetizer, 205, 206 radio

Claims (9)

1. A data receiving unit that receives measurement data acquired by the sensor;
   A measurement data storage unit for storing the measurement data received by the data reception unit;
   A transmission data selection unit for selecting new measurement data from among the measurement data stored in the measurement data storage unit;
   The data processing server performs the transmission data before the analysis processing timing of the measurement data in the data processing server that analyzes the measurement data at an interval longer than an interval at which the data reception unit receives the measurement data. A data transmission unit for transmitting the new measurement data to the data processing server so as to complete reception of the new measurement data selected by the selection unit;
   Data transmission device equipped with
   
2. The data transmission apparatus according to claim 1, wherein the transmission data selection unit selects at least two new measurement data as the new measurement data.
   
3. The measurement data acquired by the sensor is divided into a plurality of packets and received by the data receiving unit,
   The transmission data selection unit is characterized in that the new measurement data is selected from among measurement data in which all divided packets are included in the measurement data stored in the measurement data storage unit. The data transmission apparatus according to claim 1.
   
4. The data transmission unit is used to transmit the new measurement data so that the data processing server completes reception of the new measurement data before the analysis processing timing is reached, and the data processing unit corresponds to the analysis processing timing. A transmission timing storage unit that stores transmission timing information indicating transmission timing of measurement data;
   Analysis processing timing information indicating the analysis processing timing of the measurement data is received from the data processing server, new transmission timing information indicating a new transmission timing corresponding to the analysis processing timing is generated, and the transmission timing storage unit A transmission timing update unit that updates the new transmission timing information generated in the transmission timing information stored in the
   The data transmission apparatus according to claim 1, wherein when the new transmission timing is reached, the transmission data selection unit reads the measurement data from the measurement data storage unit and starts selection processing.
   
5. The data transmission unit is used to transmit the new measurement data so that the data processing server completes reception of the new measurement data before the analysis processing timing is reached, and the data processing unit corresponds to the analysis processing timing. A transmission timing storage unit that stores transmission timing information indicating transmission timing of measurement data;
   Analysis processing timing information indicating the analysis processing timing of the measurement data is received from the data processing server, new transmission timing information indicating a new transmission timing corresponding to the analysis processing timing is generated, and the transmission timing storage unit A transmission timing update unit that updates the new transmission timing information generated in the transmission timing information stored in the
   The data transmission apparatus according to claim 1, wherein when the new transmission timing is reached, the data transmission unit reads the new measurement data from the measurement data storage unit and starts transmission processing.
   
6. The data transmission unit is used to transmit the new measurement data so that the data processing server completes reception of the new measurement data before the analysis processing timing is reached, and the data processing unit corresponds to the analysis processing timing. A transmission timing storage unit that stores transmission timing information indicating transmission timing of measurement data;
   A distribution data receiving unit that receives distribution data that is a result of analysis processing distributed from the data processing server;
   A distribution timing information generation unit that generates distribution timing information indicating the distribution timing of the distribution data received by the distribution data receiving unit;
   The transmission timing information stored in the transmission timing storage unit generates new transmission timing information indicating a new transmission timing corresponding to the distribution timing included in the distribution timing information generated by the distribution timing information generation unit. A transmission timing update unit that updates the new transmission timing information that has been generated;
   The data transmission apparatus according to claim 1, wherein when the new transmission timing is reached, the transmission data selection unit reads the measurement data from the measurement data storage unit and starts selection processing.
   
7. The data transmission unit is used to transmit the new measurement data so that the data processing server completes reception of the new measurement data before the analysis processing timing is reached, and the data processing unit corresponds to the analysis processing timing. A transmission timing storage unit that stores transmission timing information indicating transmission timing of measurement data;
   A distribution data receiving unit that receives distribution data that is a result of analysis processing distributed from the data processing server;
   A distribution timing information generation unit that generates distribution timing information indicating the distribution timing of the distribution data received by the distribution data receiving unit;
   The transmission timing information stored in the transmission timing storage unit generates new transmission timing information indicating a new transmission timing corresponding to the distribution timing included in the distribution timing information generated by the distribution timing information generation unit. A transmission timing update unit that updates the new transmission timing information that has been generated;
   The data transmission apparatus according to claim 1, wherein when the new transmission timing is reached, the data transmission unit reads the new measurement data from the measurement data storage unit and starts transmission processing.
   
8. A data transmission apparatus according to any one of claims 1 to 7;
   A sensor connected to the data transmission device, acquiring measurement data, and transmitting the measurement data to the data transmission device;
   A data processing server connected to the data transmission apparatus, receiving the measurement data from the data transmission apparatus, analyzing the measurement data, and distributing a result of the analysis processing;
   Data processing system with.
   
9. Selecting new measurement data from among the measurement data acquired by the sensor;
   Before the analysis processing timing of the measurement data in the data processing server performing the analysis processing of the measurement data at an interval longer than an interval at which the sensor acquires the measurement data, the data processing server generates the new measurement data Sending the selected new measurement data to the data processing server to complete reception;
   Data transmission method comprising:

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