JP7004377B2 - Wireless communication device, wireless communication method, relay device and program - Google Patents

Description

The present invention relates to a wireless communication device, a wireless communication method, a relay device and a program.

In order to improve communication quality, a method has been proposed in which information on a communication abnormality is acquired when a communication abnormality occurs and used for analysis of the cause of the communication abnormality.

Patent Document 1 describes a mobile device that stores error information in a storage device when a mobile device is outside the service area or when a communication error occurs due to the mobile device being at a point where interference by a plurality of base stations is occurring. The system including is disclosed. The mobile device transfers the accumulated error information to the management server system when the communication is normally performed.

Patent Document 2 discloses a communication control device that stores data transmitted from a partner station in a memory and transmits the stored data to a host computer to identify the cause of the failure.

Japanese Unexamined Patent Publication No. 2002-271833 Japanese Unexamined Patent Publication No. 4-170135

However, when the data related to the communication abnormality is stored on the terminal side such as a mobile device as in the technique described in Patent Document 1, it may be difficult to identify the cause when the cause of the failure is in the terminal.

Further, in the method of accumulating the data transmitted from the partner station in the communication control device as in the technique described in Patent Document 2, the cause of the failure is specified when the cause of the failure is on the local side of the communication control device. Can be difficult.

Therefore, it may be difficult to identify the cause of the communication failure with the techniques described in Patent Document 1 and Patent Document 2.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a wireless communication device capable of more appropriately acquiring information for identifying the cause of a communication failure.

According to one aspect of the present invention, the acquisition unit for acquiring data transmitted / received in the wireless section between the relay device and the terminal device, the storage unit for storing the data, and the relay device and the terminal device. Provided is a wireless communication device including a transmission unit that transmits the data stored in the storage unit to a server when a communication failure occurs between them.

According to another aspect of the present invention, there is a step of acquiring data transmitted / received in a wireless section between the relay device and the terminal device, a step of storing the data in the storage device, and the relay device and the terminal device. Provided is a wireless communication method comprising: a step of transmitting the data stored in the storage device to a server when a communication failure occurs between the two and the like.

According to still another aspect of the present invention, the computer has a step of acquiring data transmitted / received in a wireless section between the relay device and the terminal device, a step of storing the data in the storage device, and the relay device. Provided is a program characterized by executing a step of transmitting the data stored in the storage device to a server when a communication failure occurs between the terminal device and the terminal device.

According to still another aspect of the present invention, in the relay device, when a communication failure occurs between the relay device and the terminal device, a signal indicating that the communication failure has occurred in the wireless communication device is transmitted. By transmitting, a failure information transmission unit that causes the wireless communication device to transmit data transmitted / received in the wireless section between the relay device and the terminal device stored in the wireless communication device to the server. A relay device characterized by having is provided.

According to the present invention, it is possible to provide a wireless communication device capable of more appropriately acquiring information for identifying the cause of a communication failure.

It is a block diagram which shows the schematic structure of the communication system which concerns on 1st Embodiment. It is a block diagram which shows the hardware configuration example of the relay device and the communication data acquisition device which concerns on 1st Embodiment. It is a schematic diagram which shows an example of the structure of a frame which is a structural unit of data transmitted and received in a radio section. It is a sequence diagram which shows the whole operation of the communication system which concerns on 1st Embodiment. It is a flowchart which shows the operation of the data acquisition part and the data storage part of the communication data acquisition apparatus which concerns on 1st Embodiment. It is a flowchart which shows the communication failure detection operation of the relay device which concerns on 1st Embodiment. It is a flowchart which shows the operation of the failure information receiving part and the data transmitting part of the communication data acquisition apparatus which concerns on 1st Embodiment. It is a block diagram which shows the schematic structure of the communication system which concerns on 2nd Embodiment. It is a block diagram which shows the schematic structure of the communication system which concerns on 3rd Embodiment. It is a functional block diagram of the wireless communication apparatus which concerns on 4th Embodiment. It is a functional block diagram of the relay device which concerns on 5th Embodiment.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. In the drawings, parts having the same function are designated by the same reference numerals, and the description thereof may be omitted or simplified.

[First Embodiment]
FIG. 1 is a block diagram showing a schematic configuration of a communication system according to the first embodiment. FIG. 1 shows a terminal device 100, a relay device 200, a communication data acquisition device 300, a data server 400, and a management server 500. Each of the terminal device 100, the relay device 200, and the communication data acquisition device 300 are connected to each other so as to be able to communicate with each other via the wireless network 600. The relay device 200 and the data server 400 are communicably connected via an IP (Internet Protocol) network 700. Further, the communication data acquisition device 300 and the management server 500 are communicably connected via the IP network 700. Although FIG. 1 shows one terminal device 100, one relay device 200, one communication data acquisition device 300, one data server 400, and one management server 500, the number of these is not particularly limited. There may be a plurality. The communication data acquisition device 300 may also be referred to as a wireless communication device.

The wireless network 600 may be a wireless LAN (Local Area Network). The terminal device 100 is a device capable of wireless communication by wireless LAN, and may be, for example, a laptop computer, a tablet computer, a mobile phone, an embedded device, or the like. Further, the relay device 200 may be, for example, an access point that provides wireless communication based on the wireless LAN standard. Here, the wireless LAN standard is, for example, a Wi-Fi (registered trademark) communication method defined by IEEE (Institute of Electrical and Electronic Engineers) 802.11b, IEEE802.11g, IEEE802.11n, IEEE802.11ac, or the like. possible. In the present specification, these standards may be collectively referred to as IEEE802.11x.

The relay device 200 can typically provide a communication connection to a plurality of terminal devices 100. Therefore, the terminal device 100 can typically be a plurality. The data server 400 is a server to which the terminal device 100 transmits / receives data via the relay device 200.

The relay device 200 has a relay unit 201 and a failure information transmission unit 202. The relay unit 201 may have a function of selecting a data transfer route in addition to a function of relaying between the wireless network 600 and the IP network 700. The failure information transmission unit 202 has a function of transmitting a signal indicating that a communication failure has occurred to the communication data acquisition device 300 when a communication failure occurs between the terminal device 100 and the relay device 200. The communication path for transmitting the signal indicating that the communication failure has occurred to the communication data acquisition device 300 may be wired or wireless. The failure information transmission unit 202 may be simply referred to as a transmission unit.

The communication data acquisition device 300 includes a failure information receiving unit 301, a data transmitting unit 302, a data acquisition unit 303, and a data storage unit 304. The data acquisition unit 303 has a function of acquiring data transmitted / received in the wireless section between the relay device 200 and the terminal device 100. The data storage unit 304 stores the data acquired by the data acquisition unit 303. The failure information receiving unit 301 receives a signal output from the failure information transmitting unit 202 of the relay device 200 indicating that a communication failure has occurred. When the failure information receiving unit 301 receives a signal indicating that a communication failure has occurred, the data transmitting unit 302 outputs the data stored in the data storage unit 304 to the management server 500. The data acquisition unit 303 may be simply called an acquisition unit, and the data storage unit 304 may be simply called a storage unit.

The management server 500 is a server that stores information for identifying the cause of a communication failure in order to maintain and manage the relay device 200. The management server 500 stores the data output from the communication data acquisition device 300 as information for identifying the cause of the communication failure. The engineer who maintains and manages the relay device 200 can identify the cause of the communication failure by referring to the data stored in the management server 500, and can take necessary measures to resolve the communication failure. .. Typically, the management server 500 may be installed in a place where the wireless network 600 is provided, that is, a place away from the relay device 200 and the communication data acquisition device 300.

FIG. 2 is a block diagram showing a hardware configuration example of the relay device 200 and the communication data acquisition device 300 according to the first embodiment. Since the same hardware configuration can be applied to the relay device 200 and the communication data acquisition device 300, duplicate description may be omitted.

The relay device 200 and the communication data acquisition device 300 include a CPU (Central Processing Unit) 211, a RAM (Random Access Memory) 212, a ROM (Read Only Memory) 213, a storage medium 214, an input device 215, a display device 216, and a wireless LAN interface. It has (I / F) 217 and a WAN (Wide Area Network) interface 218.

The CPU 211 performs a predetermined operation according to a program stored in the ROM 213, the storage medium 214, and the like, and also has a function of controlling each part of the relay device 200 and the communication data acquisition device 300. The RAM 212 provides a memory area necessary for the temporary operation of the CPU 211. The ROM 213 is composed of a non-volatile memory and stores necessary information such as a program used for the operation of the relay device 200 and the communication data acquisition device 300. The storage medium 214 is a large-capacity storage device such as a hard disk. The input device 215 is a keyboard, mouse, touch panel, operation buttons, etc., and is used to operate the relay device 200 and the communication data acquisition device 300. The display device 216 is a liquid crystal display device or the like, and is used for displaying information. The wireless LAN interface 217 is a wireless communication interface based on a standard such as Wi-Fi, and is a module for communicating with other devices via the wireless network 600. The WAN interface 218 is a wired or wireless communication interface based on a standard such as TCP (Transmission Control Protocol) / IP, and is a module for communicating with other devices via the IP network 700.

Here, the relationship between the functional block shown in FIG. 1 and the hardware configuration shown in FIG. 2 will be described. The relay unit 201 and the failure information transmission unit 202 may be configured by, for example, a wireless LAN interface 217, a WAN interface 218, and a CPU 211 of the relay device 200 that controls them based on a program.

The failure information receiving unit 301 may be configured by, for example, a wireless LAN interface 217 and a CPU 211 of a communication data acquisition device 300 that controls the wireless LAN interface 217 based on a program. The data transmission unit 302 may be configured by, for example, a WAN interface 218 and a CPU 211 of a communication data acquisition device 300 that controls the WAN interface 218 based on a program. The data acquisition unit 303 may be configured by, for example, a wireless LAN interface 217 and a CPU 211 of the communication data acquisition device 300 that controls the wireless LAN interface 217 based on a program. The program that causes the CPU 211 to function as a part of the data acquisition unit 303 may be, for example, packet capture software. The data storage unit 304 may be configured by, for example, a RAM 212 (or a storage medium 214) and a CPU 211 of a communication data acquisition device 300 that controls the RAM 212 (or the storage medium 214) based on a program.

The data storage unit 304 may include a ring buffer set for each terminal device 100 that is communicatively connected to the relay device 200. The ring buffer is a buffer that can be treated as a ring because the end and the beginning are logically connected. By using the ring buffer, the storage capacity allocated to each terminal device 100 can be kept at a constant value, and communication connection with a large number of terminal devices 100 becomes possible without preparing an excessive storage capacity.

The hardware configuration shown in FIG. 2 is an example, and devices other than these may be added or some devices may not be provided. For example, when the relay device 200 and the communication data acquisition device 300 can be operated via other devices, the input device 215, the display device 216, and the like may be omitted.

FIG. 3 is a schematic diagram showing an example of the structure of a MAC (Media Access Control) frame, which is a structural unit of data transmitted / received in a wireless section. The MAC frame is composed of a MAC header, payload data and a frame check sequence (FCS), and the payload data includes an IP header and IP data. The frame check sequence is data for error detection. The MAC header contains information such as frame control data, time required to transmit a frame, MAC addresses of destinations and sources, sequence numbers of data to be transmitted, fragment numbers, and the like. The IP header contains information such as the IP version, destination and source IP address. The physical header includes a PLCP (Physical Layer Convergence Protocol) header and a PLCP preamble, and is added in the physical layer. The PLCP header includes information such as a modulation method (transmission speed) and data length, and the PLCP preamble includes synchronization data and frame start delimiter data (SFD: Start of Frame Delimiter).

FIG. 4 is a sequence diagram showing the overall operation of the communication system according to the first embodiment. The upper part of FIG. 4 shows a normal operation when data is transmitted from the terminal device 100 to the data server 400. The middle part of FIG. 4 shows an operation when the relay device 200 detects a communication failure and as a result, it becomes clear that no communication failure has occurred. The lower part of FIG. 4 shows an operation when the relay device 200 detects a communication failure and as a result, it becomes clear that a communication failure has occurred.

First, the operation at the time of normal data transmission will be described. The terminal device 100 transmits data to the relay device 200 (step S1). The relay unit 201 of the relay device 200 refers to the IP address included in the received data and transmits the data to the data server 400 of the other party (step S2). Here, the communication data acquisition device 300 acquires the data transmitted from the terminal device 100 to the relay device 200 in step S1 (step S3). Note that, in FIG. 4, for the sake of simplification of the description, only the upstream data transmission from the terminal device 100 to the data server 400 is shown, but the same applies to the downstream data transmission. That is, the relay device 200 relays by the same operation, and the communication data acquisition device 300 acquires the data transmitted from the relay device 200 to the terminal device 100. In reality, uplink and downlink data can be transmitted and received in parallel based on a method such as OFDM (Orthogonal Frequency Division Multiplexing).

Next, the operation when the relay device 200 detects the communication failure and as a result, it becomes clear that the communication failure has not occurred will be described. In order to determine the occurrence of a communication failure, the relay device 200 transmits a signal requesting a response to the terminal device 100 to confirm whether or not the connection is valid (step S4). When the terminal device 100 receives the signal, it transmits a predetermined response signal to the relay device 200 (step S5). When the relay device 200 receives this response signal, the relay device 200 determines that the communication failure has not occurred because the signal has been correctly transmitted and received between the relay device 200 and the terminal device 100.

Next, the operation when the relay device 200 detects the communication failure and as a result, it becomes clear that the communication failure has occurred will be described. After step S4, when the relay device 200 cannot receive the response signal from the terminal device 100, the relay device 200 does not correctly transmit and receive the signal between the relay device 200 and the terminal device 100, so that communication is performed. Judge that a failure has occurred. At this time, the failure information transmission unit 202 of the relay device 200 transmits a signal indicating that a communication failure has occurred to the failure information reception unit 301 of the communication data acquisition device 300 (step S6). When the failure information receiving unit 301 receives the signal, the data transmitting unit 302 transmits the data stored in the data storage unit 304 to the management server 500 (step S7). This data includes data transmitted and received in the radio section between the relay device 200 and the terminal device 100 in a predetermined period before the communication failure occurs.

Next, the operation of each part will be described in more detail with reference to FIGS. 5 to 7. FIG. 5 is a flowchart showing the operation of the data acquisition unit 303 and the data storage unit 304 of the communication data acquisition device 300 according to the first embodiment.

In step S11, the data acquisition unit 303 acquires data transmitted / received in the wireless section between the terminal device 100 and the relay device 200. This operation corresponds to step S3 in FIG. In step S12, the CPU 211 of the communication data acquisition device 300 refers to the IP address or the MAC address included in the MAC frame constituting the acquired data. The CPU 211 of the communication data acquisition device 300 has already grasped whether the terminal device 100 that has transmitted data based on the IP address or the MAC address is a new terminal device 100, or the communication data acquisition device 300 has already grasped. It is determined whether the terminal device 100 is present. If the terminal device 100 is new (YES in step S12), the process proceeds to step S13. If the terminal device 100 already knows (NO in step S12), the process proceeds to step S14.

In step S13, the CPU 211 of the communication data acquisition device 300 allocates a storage area corresponding to the new terminal device 100 to the data storage unit 304, and generates a ring buffer for the new terminal device 100. In step S14, the CPU 211 of the communication data acquisition device 300 determines the corresponding terminal device 100 based on the information that identifies the terminal device 100 such as the IP address or MAC address included in the acquired data. Then, the CPU 211 of the communication data acquisition device 300 temporarily stores the data in the ring buffer of the corresponding terminal device 100. In this way, the communication data acquisition device 300 continuously acquires the data transmitted / received between the terminal device 100 and the relay device 200, and performs a process of buffering the data in the ring buffer. By identifying the terminal device 100 using the IP address or MAC address included in the acquired data, the terminal device 100 can be identified without separately transmitting such identification information.

Since the capacity that can be stored in the ring buffer is limited to a certain amount, the data exceeding the storage capacity is stored by sequentially overwriting the old data. That is, the data storage unit 304 contains data transmitted / received between the terminal device 100 and the relay device 200 within a predetermined period according to the capacity of the ring buffer.

FIG. 6 is a flowchart showing a communication failure detection operation of the relay device 200 according to the first embodiment. In step S21, the CPU 211 of the relay device 200 determines whether or not there is communication between the terminal device 100 and the relay device 200 in the relay unit 201 within a predetermined period. If there is communication within the predetermined period (YES in step S21), it is determined that no communication failure has occurred, and the process returns to the start point of the flowchart. After that, the communication failure detection operation is performed again at a predetermined timing. If there is no communication within the predetermined period (NO in step S21), that is, if there is no communication within the predetermined period, the process proceeds to step S22.

In step S22, the relay unit 201 transmits a signal requesting a response to the terminal device 100 to confirm whether or not the connection is valid. This operation corresponds to step S4 in FIG. The signal transmitted here may be, for example, a signal based on the KeepAlive protocol.

In step S23, the CPU 211 of the relay device 200 determines whether or not the response signal from the terminal device 100 has been received by the relay unit 201. If there is a response (YES in step S23), it is determined that no communication failure has occurred, and the process returns to the start point of the flowchart. This operation corresponds to step S5 in FIG. If there is no response (NO in step S23), the process proceeds to step S24.

In step S24, the failure information transmission unit 202 transmits a signal indicating that a communication failure has occurred to the failure information receiving unit 301 of the communication data acquisition device 300. This operation corresponds to step S6 in FIG. It should be noted that this signal includes information corresponding to the terminal device 100 for which no response was obtained. The information may be the IP address or MAC address of the terminal device 100. By including information corresponding to the terminal device 100 such as an IP address or a MAC address in the signal, the communication data acquisition device 300 can grasp which terminal device 100 the communication has failed.

In step S22 and step S23 described above, the signal of step S22 may be transmitted a plurality of times, and if there is no response within a predetermined number of times, the process of step S24 may be performed.

FIG. 7 is a flowchart showing the operation of the failure information receiving unit 301 and the data transmitting unit 302 of the communication data acquisition device 300 according to the first embodiment. In step S31, the failure information receiving unit 301 receives a signal from the relay device 200 indicating that a communication failure has occurred. This operation corresponds to step S6 in FIG.

In step S32, the CPU 211 of the communication data acquisition device 300 identifies which terminal device 100 the communication has failed based on the signal received from the relay device 200. For example, if the received signal includes an IP address or a MAC address, it can be determined that a failure has occurred in communication with the terminal device 100 corresponding to the IP address or the MAC address.

In step S33, the data transmission unit 302 of the communication data acquisition device 300 transmits a part or all of the data stored in the ring buffer corresponding to the terminal device 100 identified in step S32 to the management server 500. The data transmitted to the management server 500 may include data transmitted / received between the terminal device 100 and the relay device 200 during a predetermined period (for example, several minutes) before the occurrence of the communication failure. Since the data is acquired before the occurrence of the communication failure, it is possible to acquire the desired data assuming that the cause of the communication failure is the failure of the terminal device 100 or the relay device 200.

In a wireless section such as between the terminal device 100 and the relay device 200, the frequency of communication failures may be higher than in the wired section due to the surrounding environment, synchronization problems between devices, and the like. On the other hand, in the present embodiment, the management server 500 can acquire the raw data transmitted / received in the wireless section between the terminal device 100 and the relay device 200. The engineer who maintains and manages the relay device 200 can identify the cause of the communication failure by referring to this data, and can take necessary measures for resolving the communication failure. Therefore, according to the present embodiment, it is possible to provide a communication data acquisition device (wireless communication device) capable of more appropriately acquiring information for identifying the cause of a communication failure in a wireless section.

Further, in the present embodiment, more detailed information can be acquired as compared with the case where only the system log is transmitted from the relay device 200 to the management server 500 by the syslog function or the like, and it is easier to identify the communication cause. become. The system log contains minimal information such as an error message indicating that the connection has been lost, but the raw data actually sent and received in the radio section contains more information. be. Further, since the data is automatically transferred to the management server 500 when a communication failure occurs, the frequency of dispatching an engineer to the installation location of the relay device 200 for analysis and the reproduction of the communication failure for analysis. The frequency of waiting for is reduced, and communication failures can be resolved at a lower cost.

[Second Embodiment]
FIG. 8 is a block diagram showing a schematic configuration of the communication system according to the second embodiment. The difference between the present embodiment and the first embodiment is that in the first embodiment, the communication failure is detected on the relay device 200 side, whereas in the present embodiment, the communication data acquisition device 300 side performs the detection. be. Descriptions of common points with the first embodiment will be omitted or simplified.

The communication data acquisition device 300 of this embodiment has a failure detection unit 305. The failure detection unit 305 may be configured by the CPU 211 of the communication data acquisition device 300 that processes the data stored in the RAM 212 or the storage medium 214 based on the program. The failure detection unit 305 determines the presence or absence of a communication failure based on the data transmitted and received between the terminal device 100 and the relay device 200 stored in the data storage unit 304. The failure detection unit 305 may be simply referred to as a detection unit.

More specifically, for example, the presence or absence of a communication failure can be determined based on the ACK (ACKnowledgement) signal in the data. The ACK signal is a signal sent from the receiving device to the transmitting device when the device receives the signal, and is a signal for notifying the transmitting side that data transmission has been performed normally. .. For example, in IEEE802.11x, if the transmitting device does not receive the ACK signal, the transmitting device retransmits the data. Therefore, when the ACK signal is not transmitted, or when the same ACK signal is continuously transmitted, it can be determined that a communication failure has occurred. Therefore, the failure detection unit 305 can determine the presence or absence of a communication failure by confirming whether or not the state of the ACK signal in the data is a state indicating a communication abnormality as described above.

According to the present embodiment, as in the first embodiment, it is possible to provide a communication data acquisition device (wireless communication device) capable of more appropriately acquiring information for identifying the cause of a wireless communication failure. In addition to this, in the present embodiment, since it is not necessary for the relay device 200 to determine the presence or absence of a communication failure, the communication data acquisition device 300 autonomously determines the communication failure and transmits the data to the management server 500. Can be done.

[Third Embodiment]
FIG. 9 is a block diagram showing a schematic configuration of the communication system according to the third embodiment. The present embodiment is different from the first embodiment and the second embodiment in that the communication data acquisition device 300 is integrated in the relay device 200. The description of common points with the first embodiment and the second embodiment will be omitted or simplified.

The communication data acquisition device 300 of this embodiment has a failure detection unit 305. The failure detection unit 305 acquires data transmitted / received between the terminal device 100 and the relay device 200 from the relay unit 201 and determines whether or not there is a communication failure. Since the method for determining a communication failure is substantially the same as that in the first embodiment, the description thereof will be omitted. In the present embodiment, as in the second embodiment, the failure detection unit 305 may determine the presence or absence of a communication failure using the data stored in the data storage unit 304.

According to the present embodiment, as in the first embodiment, it is possible to provide a communication data acquisition device (wireless communication device) capable of more appropriately acquiring information for identifying the cause of a wireless communication failure. In addition to this, in the present embodiment, the function of the communication data acquisition device 300 can be incorporated into the relay device 200 to form a simpler configuration.

[Fourth Embodiment]
The systems and devices described in the above embodiments can also be configured as follows. FIG. 10 is a functional block diagram of the wireless communication device 800 according to the fourth embodiment. The wireless communication device 800 has an acquisition unit 801 for acquiring data transmitted / received in a wireless section between the relay device and the terminal device. Further, the wireless communication device 800 has a storage unit 802 for storing data. Further, the wireless communication device 800 has a transmission unit 803 that transmits data stored in the storage unit 802 to the server when a communication failure occurs between the relay device and the terminal device.

According to the present embodiment, it is possible to provide a wireless communication device capable of more appropriately acquiring information for identifying the cause of a wireless communication failure.

[Fifth Embodiment]
FIG. 11 is a functional block diagram of the relay device 900 according to the fifth embodiment. When a communication failure occurs between the relay device and the terminal device, the relay device 900 transmits a signal indicating that the communication failure has occurred to the wireless communication device, thereby transmitting the signal indicating that the communication failure has occurred to the wireless communication device. It has a failure information transmission unit 901 that causes a server to transmit data transmitted / received in a wireless section between a relay device and a terminal device stored in.

According to the present embodiment, it is possible to provide a relay device capable of causing the wireless communication device to more appropriately acquire information for identifying the cause of the wireless communication failure.

[Modification Embodiment]
The present invention is not limited to the above-described embodiment, and can be appropriately modified without departing from the spirit of the present invention.

For example, in the above-described embodiment, the wireless network 600 is a wireless LAN, but may be a sensor network, for example. IEEE802.1.5 can be used as the communication standard for the sensor network. In this case, the terminal device 100 may be a sensor node including a sensor and a communication device. Further, the relay device 200 may be, for example, a gateway that connects the 6LoWPAN (IPv6 over Low Power Wireless Personal Area Network) used for the sensor network and the Internet. That is, the configuration of the above-described embodiment can also be applied to information acquisition in order to identify the cause of a wireless communication failure in a so-called IoT (Internet of Things) such as a sensor network.

Further, in the above-described embodiment, the data transmission unit 302 of the communication data acquisition device 300 is configured to periodically transmit the data of the data storage unit 304 to the management server 500 not only when a failure occurs but also during normal times. May be. According to this configuration, the communication state of the wireless section between the relay device 200 and the terminal device 100 can be acquired at any time. Further, according to this configuration, the management server 500 can store both the data at the normal time and the data at the time of failure, and the technician can identify the cause of the wireless communication failure by comparing these. can. Further, in this configuration, the management server 500 automatically identifies the cause of the wireless communication failure by machine learning the analysis of the cause of the wireless communication failure using the data at the normal time and the data at the time of the failure. It may be configured as. As a result, the amount of work of the technician can be further reduced.

Further, each embodiment also implements a processing method in which a program for operating the configuration of the embodiment is recorded in a storage medium so as to realize the function of the above-described embodiment, the program recorded in the storage medium is read out as a code, and the program is executed in a computer. Included in the category of morphology. That is, a computer-readable storage medium is also included in the scope of each embodiment. Further, not only the storage medium in which the above-mentioned program is recorded but also the program itself is included in each embodiment. Further, the one or more components included in the above-described embodiment may be a circuit such as an ASIC (Application Specific Integrated Circuit) configured to realize the function of each component.

As the storage medium, for example, a floppy (registered trademark) disk, a hard disk, an optical disk, a magneto-optical disk, a CD (Compact Disk) -ROM, a magnetic tape, a non-volatile memory card, or a ROM can be used. Further, the program recorded on the storage medium is not limited to the one that executes the processing by itself, but the one that operates on the OS (Operating System) and executes the processing in cooperation with other software and the function of the expansion board. Is also included in the category of each embodiment.

It should be noted that the above-described embodiments are merely examples of embodiment of the present invention, and the technical scope of the present invention should not be construed in a limited manner by these. That is, the present invention can be implemented in various forms without departing from the technical idea or its main features.

Some or all of the above embodiments may also be described, but not limited to:

(Appendix 1)
An acquisition unit that acquires data transmitted and received in the wireless section between the relay device and the terminal device,
A storage unit that stores the data and
A transmission unit that transmits the data stored in the storage unit to the server when a communication failure occurs between the relay device and the terminal device.
A wireless communication device characterized by having.

(Appendix 2)
The wireless communication device according to Appendix 1, wherein the data transmitted by the transmission unit to the server includes data transmitted and received within a predetermined period before the communication failure occurs.

(Appendix 3)
The wireless communication device according to Supplementary Note 1 or 2, wherein the storage unit includes a ring buffer for storing the data, which is set for each terminal device to be communicated and connected to the relay device.

(Appendix 4)
The wireless communication device according to Appendix 3, wherein the data is stored in the ring buffer determined based on an IP (Internet Protocol) address or a MAC (Media Access Control) address included in the data.

(Appendix 5)
The wireless communication device according to any one of Supplementary note 1 to 4, wherein the transmission unit periodically transmits the data to the server when the communication failure does not occur.

(Appendix 6)
The wireless communication device according to any one of Supplementary note 1 to 5, further comprising a failure information receiving unit that receives a signal indicating that a communication failure has occurred from the relay device.

(Appendix 7)
The wireless communication device according to any one of Supplementary note 1 to 5, further comprising a detection unit for detecting the communication failure between the relay device and the terminal device.

(Appendix 8)
Steps to acquire data transmitted and received in the wireless section between the relay device and the terminal device,
The step of storing the data in the storage device and
A step of transmitting the data stored in the storage device to the server when a communication failure occurs between the relay device and the terminal device.
A wireless communication method characterized by having.

(Appendix 9)
On the computer
Steps to acquire data transmitted and received in the wireless section between the relay device and the terminal device,
The step of storing the data in the storage device and
A step of transmitting the data stored in the storage device to the server when a communication failure occurs between the relay device and the terminal device.
A program characterized by executing.

(Appendix 10)
It ’s a relay device,
When a communication failure occurs between the relay device and the terminal device, by transmitting a signal indicating that the communication failure has occurred to the wireless communication device, the wireless communication device can be sent to the wireless communication device. A relay device having a failure information transmission unit that causes a server to transmit data transmitted / received in a wireless section between the relay device and the terminal device that is stored.

(Appendix 11)
When a communication failure occurs between the relay device and the terminal device, the wireless communication device is stored in the wireless communication device by transmitting a signal indicating that the communication failure has occurred to the wireless communication device. A relay method comprising a step of causing a server to transmit data transmitted / received in a wireless section between the relay device and the terminal device.

(Appendix 12)
On the computer
When a communication failure occurs between the relay device and the terminal device, the wireless communication device is stored in the wireless communication device by transmitting a signal indicating that the communication failure has occurred to the wireless communication device. A program characterized by executing a step of causing a server to transmit data transmitted / received in a wireless section between the relay device and the terminal device.

100 Terminal device 200, 900 Relay device 201 Relay unit 202, 901 Failure information transmission unit 211 CPU
212 RAM
213 ROM
214 Storage medium 215 Input device 216 Display device 217 Wireless LAN interface 218 WAN interface 300 Communication data acquisition device 301 Failure information reception unit 302 Data transmission unit 303 Data acquisition unit 304 Data storage unit 305 Failure detection unit 400 Data server 500 Management server 600 Wireless Network 700 IP network 800 Wireless communication device 801 Acquisition unit 802 Storage unit 803 Transmission unit

Claims (10)

An acquisition unit that acquires raw data transmitted and received in the wireless section between the relay device and the terminal device,
A storage unit that includes a ring buffer and stores the raw data by sequentially overwriting the old raw data .
When a communication failure occurs between the relay device and the terminal device, the raw data corresponding to the storage capacity of the ring buffer stored in the storage unit before the communication failure occurs is transmitted to the server. Transmitter and
A wireless communication device characterized by having. The wireless communication device according to claim 1, wherein the raw data transmitted by the transmission unit to the server includes raw data transmitted and received within a predetermined period before the communication failure occurs. The wireless communication device according to claim 1 or 2, wherein the ring buffer is set for each terminal device that is connected to the relay device by communication. The radio according to claim 3, wherein the raw data is stored in the ring buffer determined based on an IP (Internet Protocol) address or a MAC (Media Access Control) address included in the raw data. Communication device. The wireless communication device according to any one of claims 1 to 4, wherein the transmission unit periodically transmits the raw data to the server when the communication failure does not occur. The wireless communication device according to any one of claims 1 to 5, further comprising a failure information receiving unit that receives a signal indicating that a communication failure has occurred from the relay device. The wireless communication device according to any one of claims 1 to 5, further comprising a detection unit for detecting the communication failure between the relay device and the terminal device. Steps to acquire raw data transmitted and received in the wireless section between the relay device and the terminal device,
A step of storing the raw data in a storage device including a ring buffer by sequentially overwriting the old raw data .
When a communication failure occurs between the relay device and the terminal device, the raw data corresponding to the storage capacity of the ring buffer stored in the storage device before the communication failure occurs is transmitted to the server. Steps to do and
A wireless communication method characterized by having. On the computer
Steps to acquire raw data transmitted and received in the wireless section between the relay device and the terminal device,
A step of storing the raw data in a storage device including a ring buffer by sequentially overwriting the old raw data .
When a communication failure occurs between the relay device and the terminal device, the raw data corresponding to the storage capacity of the ring buffer stored in the storage device before the communication failure occurs is transmitted to the server. Steps to do and
A program characterized by executing. It ’s a relay device,
When a communication failure occurs between the relay device and the terminal device, by transmitting a signal indicating that the communication failure has occurred to the wireless communication device, the wireless communication device can be sent to the wireless communication device. It has a failure information transmission unit that causes the server to transmit the stored raw data transmitted / received in the wireless section between the relay device and the terminal device .
The wireless communication device includes a ring buffer for storing the raw data by sequentially overwriting the old raw data.
The failure information transmission unit is a relay device characterized in that the raw data corresponding to the storage capacity of the ring buffer stored in the ring buffer before the communication failure occurs is transmitted to the server .

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