WO2014103232A1 - Communication system and communication system control method - Google Patents

Abstract

The purpose of the present invention is to provide a communication system, that has a wide communication range and that is not influenced by radio wave conditions, and a communication system control method. A communication system comprises: a first communication device comprising a first communication means for wirelessly communicating using a frequency of 400 MHz to 450 MHz inclusive and a first storage means for storing first information; and a second communication device, provided on cargo, comprising a second communication means capable of communicating with the first communication means, and a second storage means for storing second information. The second communication means transmits, to the first communication means, a request signal to request transmission of the first information. When the request signal is received, the first communication means loads the first information from the first storage means and transmits same to the second communication means. When the first information transmitted by the first communication means is received, the second communication means overwrites the second information stored in the second storage means with the first information.

Description

COMMUNICATION SYSTEM AND COMMUNICATION SYSTEM CONTROL METHOD

The present invention relates to a communication system and a communication system control method.

In recent years, a logistics management method using a communication system has been proposed. Patent Document 1 describes a quality assurance method for a physical distribution process using a data carrier. FIG. 9 is a schematic diagram of a physical distribution system using a data carrier according to Patent Document 1.

The data carrier 910 includes a memory for storing identification information of the package 920, an IrDA (Infra-red Data Association) (registered trademark) interface for infrared data communication, and the like. Information is read from and written to memory from outside the data carrier 910 via infrared data communication using an IrDA interface. When data is read from or written to the memory using radio waves instead of infrared rays, the data carrier 910 includes a radio interface including an antenna. Further, the data carrier 910 includes an impact sensor that detects an impact.

FIG. 9 shows an example of a physical distribution system using the data carrier 910 having the above configuration. The data carrier 910 is attached to the package 920 and is transported from the factory 921 to the shipper through the logistics process 922. The impact received in the logistics process 922 from the factory 921 is stored in the memory of the data carrier 910. Then, at the end of the distribution process 922, the shipper reads the stored contents of the memory using the controller 923. The shipper analyzes the stored content of the memory and collates it with transportation management data to determine whether or not the impact during transportation exceeds the limit value of the quality assurance standard. Through the above processing, information can also be written from the controller 923 to the memory.

JP2000-302111

However, the invention described in Patent Document 1 has the following problems. The data carrier 910 of Patent Literature 1 reads or writes the stored contents of the memory at the end point of the physical distribution process 922 using the controller 923 installed by the shipper. The controller 923 reads and writes the stored contents of the memory via the IrDA interface or the wireless interface of the data carrier 910. As the wireless interface, for example, RFID (Radio Frequency IDentification) can be used. The communication distance of communication using IrDA or RFID is short. Therefore, the controller 923 and the IrDA or RFID need to be close to each other within a certain distance by passing the load 920 through a gate including the controller 923.

In some cases, the controller 923 and the data carrier 910 do not communicate directly, but read or write the stored contents of the memory. For example, the data carrier 910 may include a GPS (Global Positioning System) and mobile phone communication means. By acquiring the position information of the data carrier 910 by GPS, the data carrier 910 grasps the position of the attached luggage 920 and grasps that the luggage 920 has arrived at the shipper side. In addition, the controller 923 reads and writes the contents stored in the memory via an external network, a base station, and mobile phone communication means. Also by the above processing, the data carrier 910 can read and write the memory content of the data carrier 910 attached to the package 920 when it arrives at the shipper. However, since the configuration in which the data carrier 910 includes the GPS and the mobile phone communication means requires two types of wireless interfaces, there is a problem that communication with the data carrier 910 is easily influenced by the radio wave state.

An object of the present invention is to provide a communication system and a control method for the communication system that have a wide communication range and are not easily influenced by radio wave conditions.

The communication system according to the present invention includes a first communication device including a first communication unit that performs wireless communication using a frequency of 400 MHz to 450 MHz, and a first storage unit that stores first information, and the first communication. Second communication means communicable with the means and second storage means for storing the second information, and a second communication device provided in the cargo, wherein the second communication means transmits the first information When the first communication means receives the request signal, the first communication means reads out the first information from the first storage means and transmits it to the second communication means. When the second communication means receives the first information, the second communication means rewrites the second information stored in the second storage means with the first information.

The communication system control method according to the present invention includes a first communication device including a first communication unit that performs wireless communication using a frequency of 400 MHz to 450 MHz, and a first storage unit that stores first information. A control method for a communication system including a second communication device capable of communicating with the first communication device and a second storage device for storing second information, and provided with a second communication device. The second communication means transmits a request signal for requesting transmission of the first information to the first communication means. When the first communication means receives the request signal, the second communication means receives the request signal from the first storage means. 1 information is read out and transmitted to the second communication means. When the second communication means receives the first information, the second information stored in the second storage means is stored in the first information. Control to rewrite with information And wherein the Rukoto.

According to the present invention, it is possible to provide a communication system and a communication system control method that have a wide communication range and are not easily influenced by radio wave conditions.

1 is a block diagram of a communication system according to a first embodiment. It is the schematic which shows the communication range of the communication system which concerns on 1st Embodiment. It is a sequence diagram which shows operation | movement of the communication system which concerns on 1st Embodiment. It is the schematic which shows an example of the communication system which concerns on 1st Embodiment. It is a block diagram of the communication system which concerns on 2nd Embodiment. It is the schematic of an example of the communication system which concerns on 2nd Embodiment. It is a sequence diagram which shows operation | movement of the communication system which concerns on 2nd Embodiment. It is a sequence diagram which shows operation | movement of the communication system which concerns on 3rd Embodiment. It is the schematic of the physical distribution system using the data carrier concerning patent documents 1.

[First Embodiment]
The communication system according to the first embodiment will be described with reference to FIG. FIG. 1 is a block diagram of a communication system according to the first embodiment. The communication system according to the first embodiment includes a first communication device 100 and a second communication device 200. The first communication device 100 includes a first communication unit 110 that performs wireless communication using a 400 MHz band, and a first storage unit 120 that stores information. In the present specification, a frequency band of 400 MHz to 450 MHz is referred to as a “400 MHz band”. The second communication device 200 includes a second communication unit 210 that can communicate with the first communication unit 110 and a second storage unit 220 that stores information. The second communication device 200 is provided on the cargo by being attached to the cargo (not shown).
The first communication unit 110 and the second communication unit 210 are high-frequency circuits that perform wireless communication in the 400 MHz band. The first storage unit 120 and the second storage unit 220 are, for example, semiconductor memories.

The first communication device 100 and the second communication device 200 communicate with each other via the first communication unit 110 and the second communication unit 210. Communication between the first communication unit 110 and the second communication unit 210 is performed using the 400 MHz band. Unlike communication using RFID or IrDA, communication in the 400 MHz band can perform communication over a long distance of several hundred meters or more, and communication is not easily disturbed even if an obstacle exists. Further, when the first communication device 100 and the second communication device 200 correspond to wireless stations that do not require a license, a system can be constructed more easily. In Japan, the 429 MHz band or the like is designated as the frequency of the specific low-power radio station.

The first storage unit 120 and the second storage unit 220 are means for storing information. As the first storage unit 120 and the second storage unit 220, a semiconductor memory or a hard disk is used, but is not limited thereto.

FIG. 2 is a schematic diagram showing a range in which the communication system according to the first embodiment can communicate. A first communication range 111 shown in a substantially circular shape indicates a range in which the first communication unit 110 can communicate. The second communication range 211 shown in a substantially circular shape indicates a range in which the second communication unit 210 can communicate. When the second communication range 211 and the first communication range 111 overlap, wireless communication using the 400 MHz band is started between the first communication unit 110 and the second communication unit 210.

For example, there may be a case where a transportation device such as a truck loaded with cargo is in proximity to the collection place where the first communication device 100 is installed. When the second communication range 211 of the second communication unit 210 included in the second communication device 200 attached to the cargo enters the first communication range 111 of the first communication unit 110 included in the first communication device 100, the first communication Unit 110 and second communication unit 210 start communication. Specifically, communication is started as follows. That is, before starting communication with the first communication unit 110, the second communication unit 210 continuously transmits a request signal for requesting communication. When receiving the request signal, the first communication unit 110 transmits a response signal to the second communication unit 210. When the second communication unit 210 receives the response signal, communication between the first communication unit 110 and the second communication unit 210 is started. Moreover, when the cargo enters within a predetermined distance from the first communication device 100 installed in the collection point, communication between the first communication unit 110 and the second communication unit 210 may be started.

FIG. 3 is a diagram illustrating an operation sequence of the communication system according to the first embodiment. The second communication unit 210 transmits a request signal for requesting transmission of information stored in the first storage unit 120 to the first communication unit 110 (A1). Information indicating the state of the cargo may be used as information stored in the first storage unit 120. For example, the first storage unit 120 can use the information “shipment” if the pickup site is the shipping place, and the information “shipment” if the pickup site is the arrival place.

When the first communication unit 110 receives the request signal, the first communication unit 110 transmits the request signal to the first storage unit 120 (A2). The first storage unit 120 reads information (A3) and transmits the information to the first communication unit 110 (A4). The first communication unit 110 transmits the read information to the second communication unit 210 (A5). When receiving the information, the second communication unit 210 transmits the received information to the second storage unit 220 (A6), and rewrites the storage content of the second storage unit 220 with the received information (A7). For example, the storage content of the second storage unit 220 is rewritten with the information “shipment” if the pickup location is the shipping location, or with the information “arrival” if the pickup location is the arrival location.

Here, the communication system according to the first embodiment will be described using a specific example with reference to FIG. FIG. 4 is a schematic diagram of an example of a communication system according to the first embodiment. In FIG. 4, the first communication device 100 is placed at the first point and the second point, and the cargo 400 including the second communication device 200 moves from the first point to the second point. For example, the first point is the shipment place of the cargo 400 and the second point is the arrival place of the cargo 400.

As shown in FIG. 2, when the first communication range 111 of the first communication unit 110 and the second communication range 211 of the second communication unit 210 overlap at the first point, the first communication unit 110 and the second communication range Communication with the communication unit 210 is started. As shown in FIG. 3, the second storage unit 220 is rewritten with information stored in the first storage unit 120 of the first communication device 100 at the first point. For example, the storage content of the second storage unit 220 is rewritten with information “shipment”.

When the cargo 400 moves to the second point, similarly, as shown in FIG. 2, the first communication range 111 and the second communication range 211 overlap. As a result, communication is started between the first communication unit 110 and the second communication unit 210 in the vicinity of the second point. As shown in FIG. 3, the storage content of the second storage unit 220 is rewritten with information in the first storage unit 120 of the first communication device 100 at the second point. For example, at the second point, the storage content of the second storage unit 220 is rewritten with the information “arrival”. According to an example of the communication system according to the first embodiment shown in FIG. 4, the cargo 400 transported from the shipping place (first point) to the receiving place (second point) has been shipped or received. Can be recorded.

As described above, in the communication system according to the first embodiment, the first communication device 100 rewrites the contents of the second storage unit 220 of the second communication device 200 included in the cargo by communication using the 400 MHz band. Communication using the 400 MHz band can be performed over long distances of several hundred meters or more. Therefore, in the communication system according to the first embodiment, it is not necessary to bring the cargo close to the first communication unit 110 for communication between the first communication device 100 and the second communication device 200. For example, the contents stored in the second storage unit 220 of the second communication device 200 included in the freight can be stored while the freight 400 is still loaded on the transport device even if the freight is not dropped from the transport device and brought close to the first communication unit 110. Can be rewritten. In addition, since the communication system according to the first embodiment does not need to use a plurality of communication units, the communication between the first communication device 100 and the second communication device 200 is not easily influenced by the radio wave state.

In addition, communication using the 400 MHz band is not easily disturbed even if an obstacle exists. Furthermore, when the first communication device 100 and the second communication device 200 correspond to wireless stations that do not require a license, the system can be constructed more easily.

[Second Embodiment]
A communication system according to the second embodiment will be described with reference to FIGS. FIG. 5 is a block diagram showing a configuration of a communication system according to the second embodiment. Unlike the communication system according to the first embodiment, the communication system according to the second embodiment further includes a third communication device 300. The third communication device 300 includes a third communication unit 310 that can communicate with the first communication unit 110 and the second communication unit 210, and a third storage unit 320 that stores information. The third communication device 300 includes a control unit 330 that controls a gate that is provided in a transport device that loads cargo and restricts the cargo from entering and exiting the transport device.

The third communication unit 310 is a communication unit capable of communicating with the first communication unit 110 and the second communication unit 210, and has the same configuration as the first communication unit 110 and the second communication unit 210. The third storage unit 320 is a means for storing information, and is, for example, a semiconductor memory. That is, the third storage unit 320 may have the same configuration as the first storage unit 120 and the second storage unit 220.

FIG. 6 is a schematic diagram of an example of a communication system according to the second embodiment. A first communication device 100 is provided at the pickup location. In addition, the transportation device 500 including the truck 510 and the loading platform 520 is loaded with the cargo 400 including the second communication device 200, and the third communication device 300 and the gate 600 are provided.

The gate 600 has a door-like mechanism that opens and closes. The controller 330 controls opening and closing of the gate 600. The controller 330 restricts the entry and exit of the cargo 400 from the transport device 500 by closing the door of the gate 600. Further, when the control unit 330 opens the door of the gate 600, the cargo 400 can be loaded and unloaded in the transport device 500.

As long as the transportation device 500 is a transportation device on which the cargo 400 is loaded, various transportation devices such as a railway as well as a truck can be used. The gate 600 may be a mechanism other than a door as long as it is provided in the transport device 500 and restricts the cargo 400 from entering and exiting the transport device 500.

FIG. 7 is a sequence diagram showing the operation of the communication system according to the second embodiment. The second communication unit 210 transmits a request signal for requesting transmission of information stored in the first storage unit 120 to the first communication unit 110 (B1).

When the first communication unit 110 receives the request signal, the first communication unit 110 transmits the request signal to the first storage unit 120 (B2). The first storage unit 120 reads the stored information (B3) and transmits it to the first communication unit 110 (B4). The first communication unit 110 transmits information to the second communication unit 210 (B5).
When receiving the information, the second communication unit 210 transmits the information to the second storage unit 220, and the second storage unit 220 rewrites the information with the information transmitted by the first communication unit 110. However, rewriting may not be performed for some reason. For example, when the cargo 400 includes something that shields radio waves, the second communication unit 210 cannot receive information, and the second storage unit 220 is not correctly rewritten.

Therefore, the third communication unit 310 provided in the transport device 500 intercepts the information (B5) transmitted by the first communication unit 110 (B6). Since the third communication unit 310 is provided not in the cargo 400 but in the transport device 500, for example, even when the cargo 400 includes a device that shields radio waves, the third communication unit 310 can intercept information. When the third communication unit 310 intercepts the information, the information is transmitted to the third storage unit 320 (B7), and the third storage unit 320 stores the information transmitted from the first communication unit 110 (B8).

When the cargo 400 is unloaded from the transport device 500, for example, when the transport device 500 arrives at the pickup location, the third storage means 320 reads the information (B9) and transmits it to the third communication device 310 (B10). The third communication device 310 transmits information to the second communication unit 210 (B11), and the second communication unit 210 receives the information (B12).

The second storage unit 220 rewrites the storage content of the second storage unit 220 with the information transmitted by the third communication unit 310. That is, the information received by the second communication unit is transmitted to the second storage unit 220 (B13), and the storage content of the second storage unit 220 is rewritten with the received information (B14). Thereby, even when the information transmitted by the first communication unit 110 cannot be received, the rewriting is reliably performed when the cargo 400 is unloaded from the transport device 500.

The second storage unit 220 transmits a rewrite signal notifying that the stored content has been rewritten with the received information to the second communication unit 210 (B15). Furthermore, the second communication unit 210 transmits a rewrite signal to the third communication unit 310 (B16). The third communication unit 310 transmits a rewrite signal to the control unit 330 (B17). The control unit 330 receives the rewrite signal, determines that the second storage unit 220 has been rewritten, and transmits a control signal for releasing the restriction of the gate 600 to the gate 600 (B18). When the gate 600 releases the restriction of the gate (B19), the cargo 400 can be unloaded from the transport device 500.

According to the communication system according to the second embodiment, when the cargo is unloaded from the transport device, the storage content of the second storage unit 220 can be reliably rewritten with the information stored in the first storage unit 120. Therefore, even if the second communication unit 210 cannot directly receive information from the first communication unit 110, the second storage unit 220 can be reliably rewritten.

[Third Embodiment]
A wireless system according to the third embodiment will be described with reference to FIG. The components of the wireless system according to the third embodiment are the same as the components of the wireless system according to the second embodiment shown in FIG. In the wireless system according to the second embodiment, the second storage unit 220 is rewritten with the information transmitted by the third communication unit 310. In the wireless system according to the third embodiment, when the information transmitted by the third communication unit 310 is the same as the information stored in the second storage unit 220, the second storage unit 220 is not rewritten. This is different from the wireless system according to the second embodiment.

FIG. 8 is a sequence diagram showing the operation of the communication system according to the third embodiment. The second communication unit 210 transmits a request signal for requesting transmission of information stored in the first storage unit 120 to the first communication unit 110 (C1).

When the first communication unit 110 receives the request signal, the first communication unit 110 transmits the request signal to the first storage unit 120 (C2). The first storage unit 120 reads the information (C3) and transmits it to the first communication unit 110 (C4). The first communication unit 110 transmits information to the second communication unit 210 (C5). When receiving the information, the second communication unit 210 transmits the information to the second storage unit 220 (C6), and rewrites the second storage unit 220 with the information transmitted by the first communication unit 110 (C7).

On the other hand, the 3rd communication part 310 intercepts the information which the 1st communication part 110 transmitted (C5) (C8). When the third communication unit 310 intercepts the information, the third communication unit 310 transmits the information to the third storage unit 320 (C9), and the third storage unit 320 stores the information transmitted by the first communication unit 110 (C10).

When the cargo 400 is unloaded from the transport device 500, for example, when the transport device 500 arrives at the pickup location, the third storage unit 320 reads the information (C11) and transmits it to the third communication unit 310 (C12). The third communication unit 310 transmits information to the second communication unit 210 (C13), and the second communication unit 210 receives the information (C14).

Here, a determination unit (not shown) determines whether the information stored in the second storage unit 220 is the same as the information transmitted by the first communication unit 110 in C5. The determination unit may be provided in either the second communication unit or the second storage unit. If the determination unit determines that the information stored in the second storage unit 220 is the same as the information transmitted by the first communication unit 110 in C5, rewrite the storage contents of the second storage unit 220 again. I will not. In this case, the second communication unit transmits a rewrite unnecessary signal notifying that rewriting is unnecessary to the third communication unit 310 (C15), and the third communication unit 310 transmits a rewrite unnecessary signal to the control unit 330. (C16). The control unit 330 receives the rewrite unnecessary signal, determines that the second storage unit 220 has already been rewritten, and transmits a control signal for releasing the restriction of the gate 600 to the gate 600 (C17). The gate 600 releases the restriction of the gate (C18), and the cargo 400 goes out of the transportation device 500. When the information memorize | stored in the 2nd memory | storage part 220 differs from the information which the 1st communication part 110 transmitted in C5, the procedure after B13 of FIG. 7 which concerns on 2nd Embodiment is performed.

According to the communication system according to the third embodiment, when the second storage unit 220 has already been rewritten with the information transmitted from the first communication unit 110, it is rewritten with the information transmitted from the third communication unit 310 again. Do not do. Therefore, power consumption can be reduced and consumption of the second storage unit 220 can be prevented.

The communication system and the control method of the communication system of the present invention have been described based on the above embodiment. However, the embodiment of the present invention is not limited to the above-described embodiment, and includes various modifications, changes and improvements to the above-described embodiment within the scope of the present invention and based on the basic technical idea of the present invention. Further, various combinations, substitutions, or selections of various disclosed elements are possible within the scope of the claims of the present invention. Further problems, objects, and developments of the present invention will become apparent from the entire disclosure of the present invention including the claims.
This application claims the priority on the basis of Japanese application Japanese Patent Application No. 2012-281061 for which it applied on December 25, 2012, and takes in those the indications of all here.
In addition, although embodiment of this invention can be described also as the following additional remarks, it is not limited to these.
(Appendix 1)
A first communication device comprising a first communication means for performing wireless communication using a frequency of 400 MHz to 450 MHz, and a first storage means for storing first information;
A second communication means capable of communicating with the first communication means and a second storage means for storing second information; and a second communication device provided in the cargo,
The second communication means transmits a request signal for requesting transmission of the first information to the first communication means;
When the first communication unit receives the request signal, the first communication unit reads the first information from the first storage unit and transmits the first information to the second communication unit.
When the second communication means receives the first information, the second communication means rewrites the second information stored in the second storage means with the first information.
Communications system.
(Appendix 2)
Furthermore, the third communication means capable of communicating with the first communication means and the second communication means, a third storage means for storing third information, and a transport means for loading the cargo, the transport means Control means for controlling a gate for restricting the entry and exit of the cargo from a third communication device,
The third communication means receives the first information transmitted by the first communication means, rewrites the third information stored in the third storage means with the first information, and the cargo is Before leaving the gate, the third communication means transmits the first information read from the third storage means to the second communication means,
The second communication device is:
When the first information transmitted by the third communication unit is different from the second information stored in the second storage unit, the second information is rewritten and rewritten with the first information. Sending a rewrite signal to notify the third communication means,
When the third communication unit receives the rewrite signal, the control unit releases the restriction on the gate.
The communication system according to attachment 1.
(Appendix 3)
The communication system according to attachment 2, wherein
The second communication device is:
When the first information transmitted by the third communication unit is the same as the second information stored in the second storage unit, a rewrite unnecessary signal is transmitted to the third communication unit,
When the third communication unit receives the rewrite unnecessary signal, the control unit releases the restriction on the gate.
Communications system.
(Appendix 4)
The communication system according to any one of appendices 1 to 3, wherein the first communication device is placed at a first point and a second point, respectively.
The second communication device rewrites the second information stored in the second storage means with the first information transmitted by the first communication device at each point,
Communications system.
(Appendix 5)
The communication system according to any one of appendices 1 to 4, wherein the first communication unit and the second communication unit are specific low-power radio stations.
Communications system.
(Appendix 6)
The communication system according to any one of appendices 1 to 5, wherein the frequency used by the first communication unit and the second communication unit is 429 MHz or more and 430 MHz or less,
Communications system.
(Appendix 7)
A first communication device comprising a first communication means for performing wireless communication using a frequency of 400 MHz to 450 MHz, and a first storage means for storing first information;
A control method for a communication system including a second communication device capable of communicating with the first communication device and a second storage device for storing second information, the second communication device provided in the cargo,
The second communication means transmits a request signal for requesting transmission of the first information to the first communication means;
When the first communication unit receives the request signal, the first communication unit reads the first information from the first storage unit and transmits the first information to the second communication unit.
When the second communication means receives the first information, the second communication means rewrites the second information stored in the second storage means with the first information.
A control method of a communication system.
(Appendix 8)
Furthermore, the third communication means capable of communicating with the first communication means and the second communication means, a third storage means for storing third information, and a transport means for loading the cargo, the transport means A control means for controlling a gate for restricting the entry / exit of the cargo from, a third communication device comprising: a communication system control method according to appendix 7,
The third communication means receives the first information transmitted by the first communication means, rewrites the third information stored in the third storage means with the first information, and the cargo is Before leaving the gate, the third communication means transmits the first information read from the third storage means to the second communication means,
The second communication device is:
When the first information transmitted by the third communication unit is different from the second information stored in the second storage unit, the second information is rewritten and rewritten with the first information. Sending a rewrite signal to notify the third communication means,
When the third communication means receives the rewrite signal, the control means controls to release the restriction of the gate,
A control method of a communication system.
(Appendix 9)
The second communication device is:
When the first information transmitted by the third communication unit is the same as the second information stored in the second storage unit, a rewrite unnecessary signal is transmitted to the third communication unit,
When the third communication means receives the rewrite unnecessary signal, the control means controls to release the restriction of the gate,
The control method of the communication system described in appendix 8.
(Appendix 10)
A communication system control method according to any one of appendices 7 to 9,
The first communication device is placed at a first point and a second point, respectively.
The second communication device controls to rewrite the second information stored in the second storage unit with the first information transmitted by the first communication device at each point. ,
A control method of a communication system.
(Appendix 11)
The communication system according to any one of appendices 7 to 10, wherein the first communication unit and the second communication unit are specific low-power radio stations.
A control method of a communication system.
(Appendix 12)
The control method of the communication system according to any one of appendices 7 to 11, wherein the frequency used by the first communication unit and the second communication unit is 429 MHz or more and 430 MHz or less,
A control method of a communication system.

DESCRIPTION OF SYMBOLS 100 1st communication apparatus 110 1st communication part 111 1st communication range 120 1st memory | storage part 200 2nd communication apparatus 210 2nd communication part 211 2nd communication range 220 2nd memory | storage part 300 3rd communication apparatus 310 3rd communication part 320 Third storage unit 330 Control unit 400 Cargo 500 Transport equipment 510 Truck 520 Cargo bed 600 Gate 910 Data carrier 920 Cargo 921 Factory 922 Logistics process 923 Controller

Claims (10)

A first communication device comprising a first communication means for performing wireless communication using a frequency of 400 MHz to 450 MHz, and a first storage means for storing first information;
A second communication means capable of communicating with the first communication means and a second storage means for storing second information; and a second communication device provided in the cargo,
The second communication means transmits a request signal for requesting transmission of the first information to the first communication means;
When the first communication unit receives the request signal, the first communication unit reads the first information from the first storage unit and transmits the first information to the second communication unit.
When the second communication means receives the first information, the second communication means rewrites the second information stored in the second storage means with the first information.
Communications system. Furthermore, the third communication means capable of communicating with the first communication means and the second communication means, a third storage means for storing third information, and a transport means for loading the cargo, the transport means Control means for controlling a gate for restricting the entry and exit of the cargo from a third communication device,
The third communication means receives the first information transmitted by the first communication means, rewrites the third information stored in the third storage means with the first information, and the cargo is Before leaving the gate, the third communication means transmits the first information read from the third storage means to the second communication means,
The second communication device is:
When the first information transmitted by the third communication unit is different from the second information stored in the second storage unit, the second information is rewritten and rewritten with the first information. Sending a rewrite signal to notify the third communication means,
When the third communication unit receives the rewrite signal, the control unit releases the restriction on the gate.
The communication system according to claim 1. A communication system according to claim 2,
The second communication device is:
When the first information transmitted by the third communication unit is the same as the second information stored in the second storage unit, a rewrite unnecessary signal is transmitted to the third communication unit,
When the third communication unit receives the rewrite unnecessary signal, the control unit releases the restriction on the gate.
Communications system. The communication system according to any one of claims 1 to 3, wherein the first communication device is placed at a first point and a second point, respectively.
The second communication device rewrites the second information stored in the second storage means with the first information transmitted by the first communication device at each point,
Communications system. The communication system according to any one of claims 1 to 4, wherein the first communication unit and the second communication unit are specific low-power radio stations.
Communications system. A first communication device comprising a first communication means for performing wireless communication using a frequency of 400 MHz to 450 MHz, and a first storage means for storing first information;
A control method for a communication system including a second communication device capable of communicating with the first communication device and a second storage device for storing second information, the second communication device provided in the cargo,
The second communication means transmits a request signal for requesting transmission of the first information to the first communication means;
When the first communication unit receives the request signal, the first communication unit reads the first information from the first storage unit and transmits the first information to the second communication unit.
When the second communication means receives the first information, the second communication means rewrites the second information stored in the second storage means with the first information.
A control method of a communication system. Furthermore, the third communication means capable of communicating with the first communication means and the second communication means, a third storage means for storing third information, and a transport means for loading the cargo, the transport means A control means for controlling a gate for restricting entry / exit of the cargo from the vehicle, a third communication device comprising: a communication system control method according to claim 6,
The third communication means receives the first information transmitted by the first communication means, rewrites the third information stored in the third storage means with the first information, and the cargo is Before leaving the gate, the third communication means transmits the information read from the third storage means to the second communication means,
The second communication device is:
When the first information transmitted by the third communication unit is different from the second information stored in the second storage unit, the second information is rewritten and rewritten with the first information. Sending a rewrite signal to notify the third communication means,
When the third communication means receives the rewrite signal, the control means controls to release the restriction of the gate,
A control method of a communication system. The second communication device is:
When the first information transmitted by the third communication unit is the same as the second information stored in the second storage unit, a rewrite unnecessary signal is transmitted to the third communication unit,
When the third communication means receives the rewrite unnecessary signal, the control means controls to release the restriction of the gate,
A control method for a communication system according to claim 7. The first communication device is placed at a first point and a second point, respectively.
The second communication device controls to rewrite the second information stored in the second storage unit with the first information transmitted by the first communication device at each point. ,
A control method for a communication system according to any one of claims 6 to 8. The frequency used by the first communication unit and the second communication unit is 429 MHz or more and 430 MHz or less,
The communication system according to any one of claims 1 to 5.

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