JP2014132734A - Protocol analyzer, analysis method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate communication analysis.SOLUTION: The content and cause of a communication error are displayed with the floor plan of a house in which an air conditioning system to be analyzed is installed (steps S101, S108 to S110). This enables a user to easily analyze communication in consideration of the positions of an air conditioner and a controller constituting the air conditioning system. In particular, if communication between the apparatuses constituting the air conditioning system is cut off, it is easy to consider the locations of the respective apparatuses.

Description

  The present invention relates to a protocol analyzer, an analysis method, and a program.

  Electrical devices installed in large-scale facilities such as office buildings and stores are connected to each other via a network and are centrally managed by a remote controller, a control device, or the like. In recent years, home appliances equipped with a wireless communication device for connecting to the Internet or a home LAN have also appeared. A user of these home appliances can operate the home appliance using, for example, an operation remote controller or a terminal such as a smart phone.

  When a communication error occurs in a network to which an electrical device is connected, or when performing maintenance of this type of network, for example, protocol analyzers disclosed in Patent Documents 1 and 2 are used.

  The protocol analyzer disclosed in Patent Document 1 receives information transmitted / received between communication devices, and analyzes the operation status and radio wave status of the communication device. The protocol analyzer disclosed in Patent Document 2 analyzes the state of communication between communication devices by comparing the waveform of signals transmitted and received between communication devices with the waveform of an ideal signal.

JP 2007-312320 A JP 2009-260450 A

  The protocol analyzers disclosed in Patent Documents 1 and 2 analyze communication without considering the position of a communication device that performs communication. For this reason, it was not possible to easily identify the cause of the communication error.

  The present invention has been made under the circumstances described above, and an object thereof is to easily analyze communication.

  In order to achieve the above object, a protocol analyzer of the present invention is a protocol analyzer for analyzing communication of a network to which home appliances are connected, and includes a communication means for communicating with the network and a floor plan of a facility in which the home appliances are installed. Acquired by the storage means for storing the information of the figure, the acquisition means for acquiring the position information in the facility of the home appliance and the data transmitted and received between the home appliance and the network via the communication means, and the acquisition means Display means for displaying data and a floor plan in which the position of the home appliance is mapped based on the position information.

  According to the present invention, when analyzing communication, the position information of the communication device is displayed together with the data transmitted and received between the communication devices. For this reason, it is possible to easily analyze the communication in consideration of the position of the communication device.

It is a block diagram of the air-conditioning system concerning this embodiment. It is a floor plan of the house where an air-conditioning system is installed. It is a block diagram which shows the control system of an air conditioner. It is a block diagram of a controller. It is a block diagram of a protocol analyzer. It is a flowchart which shows the analysis process performed by CPU of a protocol analyzer. It is a flowchart which shows a recognition process. It is a figure which shows the window displayed on a display part. It is a figure which shows the image of a floor plan.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an air conditioning system 10 to which a protocol analyzer 50 according to the present embodiment is connected. The air conditioning system 10 includes three air conditioners 20 connected to each other via a network 60 such as a wireless local area network (LAN), and a controller 30 for operating these air conditioners 20. The air conditioning system 10 is installed in a house 110 such as an apartment or a detached house.

FIG. 2 is a floor plan of the house 110 where the air conditioning system 10 is installed. As shown in FIG. 2, the house 110 has three living rooms SP1, SP2 and SP3. Three air conditioners 20 ₁ , 20 ₂ , and 20 ₃ constituting the air conditioning system 10 are installed in the room SP1, SP2, SP3, respectively. The position of the air conditioner 20 in the rooms SP1 to SP3 is indicated by position coordinates (x, y) in the XY coordinate system with the lower left corner of the house 110 as the origin.

  The air conditioner 20 is an apparatus that performs air conditioning of the living rooms SP1 to SP3. The air conditioner 20 includes an indoor unit installed on the wall surface of the room and an outdoor unit installed outside the house 110. FIG. 3 is a block diagram showing a control system of the air conditioner 20. As shown in FIG. 3, the air conditioner 20 includes a CPU (Central Processing Unit) 21, a main storage unit 22, an auxiliary storage unit 23, a display unit 24, an interface unit 26, and a system bus 27 that interconnects the above units. have.

  The main storage unit 22 includes a RAM (Random Access Memory) and the like, and is used as a work area for the CPU 21.

  The auxiliary storage unit 23 includes a nonvolatile memory such as a ROM (Read Only Memory) and a semiconductor memory. The auxiliary storage unit 23 stores programs executed by the CPU 21 and various parameters. Moreover, the apparatus information of the air conditioner 20 and the positional information which shows the position where the air conditioner 20 is installed are memorize | stored.

The equipment information of the air conditioner 20 is information indicating the name, output, model, and the like of the air conditioner 20, for example. The position information is a position in the room SP1 to SP3. This position information is given by position coordinates (x, y) in the XY coordinate system. In the present embodiment, the position coordinates of the air conditioners 20 ₁ , 20 ₂ , and 20 ₃ are (x1, y1), (x2, y2), and (x3, y3), respectively.

  The display unit 24 includes an LCD (Liquid Crystal Display) or a display panel, and displays a set temperature, a room temperature, an operation mode, and the like based on an instruction from the CPU 21.

  The interface unit 26 has a wireless LAN interface. The air conditioner 20 is connected to the network 60 via the interface unit 26. The air conditioner 20 performs wireless communication with the controller 30 via the interface unit 26.

  FIG. 4 is a block diagram of the controller 30. The controller 30 includes a CPU 31, a main storage unit 32, an auxiliary storage unit 33, a display unit 34, an input unit 35, an interface unit 36, and a system bus 37 that interconnects the above units.

  The main storage unit 32 includes a RAM (Random Access Memory) and the like, and is used as a work area for the CPU 31.

  The auxiliary storage unit 33 includes a nonvolatile memory such as a ROM (Read Only Memory) and a semiconductor memory. The auxiliary storage unit 33 stores programs executed by the CPU 31, various parameters, and the like.

  The display unit 34 has an LCD (Liquid Crystal Display) and displays the processing result of the CPU 31 and the like.

  The input unit 35 has a pointing device such as a hard key or a touch panel. In the controller 30, the input unit 35 and the display unit 34 constitute a GUI (Graphical User Interface).

  The interface unit 36 has a wireless LAN interface. The controller 30 is connected to the network 60 via the interface unit 36. In addition, the controller 30 communicates with the air conditioner 20 via the interface unit 36.

  The controller 30 configured as described above is detachably installed, for example, on the wall surfaces of the living rooms SP1 to SP3.

  FIG. 5 is a block diagram of the protocol analyzer 50. As shown in FIG. 5, the protocol analyzer 50 includes a CPU 51, a main storage unit 52, an auxiliary storage unit 53, a display unit 54, an input unit 55, an interface unit 56, and a system bus 57 that interconnects the above units. doing.

  The main storage unit 52 includes a RAM (Random Access Memory) and the like, and is used as a work area for the CPU 51.

  The auxiliary storage unit 53 includes a nonvolatile memory such as a ROM (Read Only Memory), a magnetic disk, and a semiconductor memory. The auxiliary storage unit 53 stores programs executed by the CPU 51, various parameters, and the like. Further, the auxiliary storage unit 53 stores in advance image information 61 indicating a floor plan (see FIG. 3) of the house 110 where the air conditioning system 10 is installed. Further, it receives position information 63 and device information 62 received from the air conditioner 20 and the controller 30, and stores these information. In the present embodiment, the position information 63 and the device information 62 are acquired from the air conditioner 20 or the like at the timing when the protocol analyzer 50 recognizes the air conditioner 20 or the like.

  The display unit 54 has an LCD (Liquid Crystal Display) and displays the processing result of the CPU 51 and the like.

  The input unit 55 includes a hard key, a pointing device such as a mouse or a touch panel.

  The interface unit 56 has a wireless LAN interface. The protocol analyzer 50 can communicate with a device connected to the network 60 via the interface unit 56 in accordance with WiFi or ZigBee.

  Communication between each of the above-described air conditioners 20 and the controller 30 is performed irregularly. The contents of this communication are an operation instruction, a stop instruction, a mode setting, a target temperature setting, and the like of the air conditioner 20. And communication with the controller 30 and the air conditioner 20 is performed according to the protocol according to ECHONET specification, for example.

  In communication according to this protocol, identification information indicating a transmission source and a transmission destination is added to transmitted information. Further, according to the ECHONET standard, each device connected to the network holds a property map indicating function information and information regarding an installation location.

  Next, the operation of the protocol analyzer 50 will be described with reference to FIG. As a premise, it is assumed that the air conditioner 20 is operated and communication between the air conditioner 20 and the controller 30 is established. FIG. 6 is a flowchart showing analysis processing executed by the CPU 51 constituting the protocol analyzer 50. A series of processing shown in this flowchart is executed when the protocol analyzer 50 is activated.

  In the first step S <b> 101, the CPU 51 reads out the floor plan image information 61 and the air conditioner 20 position information 63 from the auxiliary storage unit 53. Then, by mapping the air conditioner 20 to an image showing the floor plan, a display image in which the floor plan shown in FIG. 2 and the air conditioner 20 are displayed is generated. The CPU 51 outputs image information indicating the display image to the display unit 54. Thereby, the floor plan 110 in which the air conditioner 20 is mapped is displayed on the display unit 54 of the protocol analyzer 50.

  In the next step S <b> 102, the CPU 51 analyzes the communication executed between the controller 30 and each air conditioner 20. Specifically, the CPU 51 acquires information transmitted and received between the controller 30 and the air conditioner 20 via the network 60. This information is acquired in units of frames.

In the next step S103, the CPU 51 determines whether there is a device newly connected to the network 60 from the information acquired in step S102. This determination is performed by analyzing the information acquired in step S102, for example, when information transmitted from the controller 30 to a device other than the air conditioners 20 _{1 to} 20 ₃ is detected, or the air conditioners 20 _{1 to} 20 _3. When information transmitted from other devices to the controller 30 is detected, it is determined that there is a device newly connected to the network 60 (step S103: Yes). On the other hand, it not detected information transmitted to the air conditioner ₂₀ 1 to 20 ₃ other device from the controller 30, and information from a device other than the air conditioning devices ₂₀ 1 to 20 ₃ are sent to the controller 30 is not detected In this case, it is determined that there is no device newly connected to the network 60 (step S103: No).

  If the determination in step S103 is affirmative, the CPU 51 proceeds to step S104, and if the determination is negative, the CPU 51 proceeds to step S105.

  In step S104, a recognition process for recognizing a device newly connected to the network 60 is performed. This recognition process is realized by executing a subroutine 200 shown in FIG.

  In the first step S201 of the subroutine 200, the CPU 51 inquires of the user whether or not the newly found device is to be analyzed in the future. This inquiry is made by popping up a window 65 shown in FIG. In the window 65, the contents of the inquiry are shown.

  The user can answer this inquiry via the input unit 55. For example, the user can make an answer to affirm the content of the inquiry by selecting the button 65a of the window 65. Further, by selecting the button 65b, an answer can be made that denies the contents of the inquiry.

  In the next step S202, the CPU 51 determines whether there is an instruction to add a new device. For example, when the user selects the button 65b of the window 65, the CPU 51 determines that there is no instruction to add a new device (step S202: No). In this case, the subroutine 200 is terminated and the process proceeds to the next step S105.

  On the other hand, when the button 65a of the window 65 is selected by the user, the CPU 51 determines that there is an instruction to add a new device (step S202: Yes), and proceeds to step S203.

  In the next step S203, the CPU 51 acquires position information from a newly connected device (hereinafter also referred to as a new device). As described above, the communication according to the present embodiment is performed according to a protocol conforming to the ECHONET standard. Therefore, the new device holds position information.

In the next step S204, the CPU 51 maps the new device to the image showing the floor plan based on the position information acquired in step S203, and generates a display image in which the floor plan and the new device are displayed. For example, if the new device is a conditioning device 20 ₄ newly installed in room SP3, based on the position coordinates of the air conditioner 20 ₄ (x4, y4), an image showing a floor plan of FIG. 2, icon indicating the air conditioner 20 ₄ are added. As a result, as shown in FIG. 9, a floor plan display image showing the _four air conditioners 20 _{1 to} 20 ₄ is generated. In this way, the CPU 51 outputs the image information of the new display image to the display unit 54 and the auxiliary storage unit 53. Thereby, the image information in the display unit 54 and the auxiliary storage unit 53 is updated.

  CPU51 complete | finishes the subroutine 200, after complete | finishing the process of step S204, and transfers to the following step S105.

  In the next step S105, the CPU 51 displays the acquired information. Specifically, the CPU 51 displays the acquired information for each frame and displays the transmission source and the transmission destination of the frame together. Thereby, the information transmitted / received between the controller 30 and the air conditioner 20 is simultaneously displayed on the display part 54 with the display image which shows a floor plan.

  In the next step S106, the CPU 51 determines whether or not a communication error has occurred based on the acquired information. When the CPU 51 determines that a communication error has not occurred (step S106: No), the CPU 51 returns to step S101, and repeatedly executes the processing after step S101. On the other hand, when the CPU 51 determines that a communication error has occurred (step S106: Yes), the CPU 51 proceeds to step S107.

  In step S107, the CPU 51 determines whether communication has been interrupted. For example, when the acquired information frames are not continuous, the CPU 51 determines that communication has been interrupted (step S170: No), and proceeds to step S108.

  In step S108, the CPU 51 displays the content of the communication error. There are roughly two types of communication errors: an error caused by an incorrect protocol and an error caused by an incorrect protocol but transmitted / received data. The CPU 51 analyzes the communication error and displays the cause of the error on the display unit 54. When the process of step S108 ends, the CPU 51 returns to step S101 and repeatedly executes the processes after step S101.

  On the other hand, if the CPU 51 determines in step S107 that communication has been interrupted (step S107: Yes), the CPU 51 proceeds to step S109.

  In step S109, the CPU 51 estimates the cause of the communication error. For example, a communication error when wireless communication is interrupted includes (1) a communication error caused by radio wave interference from an internal device, (2) a communication error caused by radio wave interference from an external device, ( 3) There are three possible communication errors due to carrier attenuation.

  A communication error caused by interference of internal devices occurs when the air conditioner 20 and the controller 30 constituting the air conditioning system 10 transmit information at the same timing. In addition, a communication error caused by interference by an external device is that radio waves in a frequency band used for communication by the air conditioning system 10 are emitted from the external device, and the radio waves interfere with radio waves used for communication of the air conditioning system. Caused by. In addition, a communication error caused by the attenuation of a carrier wave occurs when a radio wave used as a carrier wave for communication attenuates, for example, by being blocked by an obstacle or irregularly reflected.

  Therefore, the CPU 51 transmits the information simultaneously based on the acquired information, and when the frames overlap, the cause of the communication error is the mutual interference of the radio waves emitted from the internal device. Is presumed to be the cause.

  Further, when the acquired information includes information transmitted from devices other than the devices constituting the air conditioning system 10, the cause of the communication error is the interference between the radio wave from the external device and the radio wave of the internal device. Is presumed to be the cause.

  Further, based on the position information of the air conditioner 20 and the controller 30 and the floor plan, the CPU 51 determines that the communication error is caused by the attenuation of radio waves when there are obstacles such as furniture and wall surfaces between the devices. presume.

  In the next step S110, the CPU 51 displays the cause of the communication error estimated in step S109 on the display unit 54.

  The user can change the settings of the devices constituting the air conditioning system 10 in consideration of the cause of the communication error displayed on the display unit 54. For example, when the communication error is caused by radio wave interference from the internal device, it is conceivable to change the transmission cycle or timing of the air conditioner 20 or the controller 30 that is the transmission source of frames that overlap each other. Further, when the communication error is caused by radio wave interference from an external device, it is conceivable to change the frequency of the radio wave used for communication. Further, in the case where the attenuation of radio waves is the cause, it is conceivable to remove obstacles or walls positioned between the air conditioner 20 and the controller 30 or change the installation positions of the air conditioner 20 and the controller 30.

  The change of the transmission cycle and timing, and the change of the frequency of the radio wave used for communication can be changed via the input unit 55 constituting the protocol analyzer 50.

When the installation position of the air conditioner 20 or the controller 30 is changed, the user moves from the protocol analyzer 50 by dragging and moving the icons indicating the air conditioner 20 or the controller 30 displayed together with the floor plan. The position coordinates corresponding to the later icon can be transmitted to each device. For example, by dragging the icon indicating the air conditioner 20 _1, when changes position coordinates from (x1, y1) to (xx1, yy2) the position coordinates (xx1 as position information of the air conditioner 20 _1, xx2 information about) is output to the air conditioner 20 _1. The location information, is received in the air conditioner 20 _1, the air conditioner 20 ₁ is updated position coordinates as the position information held from (x1, y1) to (xx1, yy2).

  In step S111, the CPU 51 determines whether or not the above-described system change has been performed by the user. The CPU 51 determines that the transmission cycle and timing for transmitting information or the frequency of radio waves used for communication has been changed, or determines that the icons indicating the air conditioner 20 and the controller 30 displayed together with the floor plan have been moved. (Step S111: Yes), the process proceeds to Step S112.

  In step S112, the CPU 51 transmits the changed information to each device. Thereby, in each device, the position information and device information stored in the auxiliary storage unit are updated. When the process of step S112 is completed, the CPU 51 returns to step S101 and repeatedly executes the processes after step S101.

  On the other hand, when it is determined in step S111 that the above-described change or the like has not been performed (step S111: No), the process returns to step S101, and the processes after step S101 are repeatedly executed.

  As described above, in the protocol analyzer 50 according to the present embodiment, the floor plan of the house 110 where the air conditioning system 10 to be analyzed is installed is displayed (step S101), and the content and cause of the communication error are displayed. (Steps S108 and S110). Thereby, the user can easily analyze the communication in consideration of the positions of the air conditioner 20 and the controller 30 constituting the air conditioning system 10.

  In this embodiment, when a communication error occurs even though communication is established, it is a communication error caused by an invalid protocol, or data transmitted / received although the protocol is correct. It is analyzed whether the communication error is caused by fraud. Then, the analysis result is displayed together with the floor plan of the house 110. For this reason, even if the user does not understand the protocol in detail, it is possible to easily determine which device has a communication error.

  In the present embodiment, when communication is not established, the cause of the communication failure is estimated (step S109). Then, the cause of the communication interruption is displayed together with the floor plan of the house 110. For this reason, the user can easily determine the cause of the communication failure.

  As described above, communication errors that can be considered when wireless communication is interrupted are (1) communication errors caused by radio wave interference from internal devices, and (2) radio wave interference from external devices. (3) A communication error caused by the attenuation of a carrier wave. These communication errors are largely due to the influence of the installation position of the devices constituting the air conditioning system 10, the layout of the house 110, the position of the furniture provided in the house 110, and the like. Therefore, by displaying both the cause of the communication error and the floor plan of the house 110 to the user, the user can easily determine the cause of the communication error.

  In this embodiment, when a new device connected to the air conditioning system 10 is found (step S103: Yes), the user is notified that a new device has been found (step S201). Thereby, the user can easily implement the process of incorporating the new device into the existing system.

  In the present embodiment, it is possible to change the period and timing at which each device constituting the air conditioning system 10 transmits information and the frequency of the radio wave used for communication via the protocol analyzer 50. For this reason, the user can easily change the setting of the air conditioning system 10.

  Further, the user can update the position information of the devices constituting the air conditioning system 10 by moving icons indicating the air conditioner 20 and the controller 30 displayed together with the floor plan. Therefore, the user can easily update the position information of the air conditioning system.

  As mentioned above, although embodiment of this invention was described, this invention is not limited by the said embodiment. For example, in the above-described embodiment, the case where the protocol analyzer 50 analyzes communication between devices that configure the air conditioning system 10 has been described. Not limited to this, the protocol analyzer 50 is also suitable for analyzing a system in which devices such as an electromagnetic cooker, a refrigerator, a rice cooker, a microwave oven, a washing machine, a vacuum cleaner, a personal computer, a FAX, and a television are connected.

  In this embodiment, the analysis result is displayed on the display unit 54 of the protocol analyzer 50, but the display mode of the analysis result is not particularly limited. As a display mode of the analysis result, the analysis result may be displayed separately from the floor plan of the house 110, or the analysis result may be displayed superimposed on the floor plan. In this case, an icon indicating the air conditioner 20 or the like and an analysis result of the device may be displayed in association with each other.

  In the air conditioning system 10 according to the present embodiment, when a communication error or the like due to radio wave interference occurs, it is possible to search for a place where interference does not occur while moving the protocol analyzer 50. Thus, by using the protocol analyzer 50, it becomes easy to arrange the devices constituting the air conditioning system 10 so as not to cause radio wave interference.

  The protocol analyzer 50 according to the above embodiment can be realized by dedicated hardware or by a normal computer system.

  Various embodiments and modifications can be made to the present invention without departing from the broad spirit and scope of the present invention. Further, the above-described embodiment is for explaining the present invention, and does not limit the scope of the present invention. That is, the scope of the present invention is shown not by the embodiments but by the claims. Various modifications within the scope of the claims and within the scope of the equivalent invention are considered to be within the scope of the present invention.

  The protocol analyzer, analysis method, and program of the present invention are suitable for communication analysis.

  DESCRIPTION OF SYMBOLS 10 Air conditioning system, 20 Air conditioner, 21 CPU, 22 Main memory part, 23 Auxiliary memory part, 24 Display part, 26 Interface part, 27 System bus, 30 Controller, 31 CPU, 32 Main memory part, 33 Auxiliary memory part, 34 Display unit, 35 input unit, 36 interface unit, 37 system bus, 50 protocol analyzer, 51 CPU, 52 main storage unit, 53 auxiliary storage unit, 54 display unit, 55 input unit, 56 interface unit, 57 system bus, 60 network , 61 Image information, 62 Device information, 63 Location information, 65 window, 65a, 65b button, 110 house, SP1-SP3 room

Claims (9)

A protocol analyzer for analyzing communication on a network to which home appliances are connected,
Communication means for communicating with the network;
Storage means for storing floor plan information of a facility where the home appliance is installed;
Via the communication means, acquisition means for acquiring position information in the facility of the home appliance, and data transmitted and received between the home appliance and the network;
Display means for displaying the data acquired by the acquisition means and the floor plan in which the position of the home appliance is mapped based on the position information;
A protocol analyzer comprising:   The protocol analyzer according to claim 1, wherein the communication unit acquires the location information when the home appliance connected to the network is found. The home appliance stores the location information in advance and performs wireless communication with the network,
The protocol analyzer according to claim 1, wherein the communication unit acquires the position information from the home appliance via the network. Detecting means for detecting a communication error between the home appliance and the network based on the data;
When a communication error is detected by the detection unit, a determination unit that determines whether the cause of the error is due to a protocol or due to wireless communication;
With
The protocol analyzer according to claim 3, wherein the display unit displays a determination result of the detection unit. The display means includes
If the error is due to a protocol, display the error details,
The protocol analyzer according to claim 4, wherein when the cause of the error is due to wireless communication, the content of the error estimated from the information of the floor plan to which the position of the home appliance is mapped and the data is displayed. It has an interface for accepting user operations,
When the position of the home appliance mapped to the floor plan displayed on the display unit is changed via the interface, the communication unit changes the position information of the home appliance after the change, The protocol analyzer as described in any one of Claims 1 thru | or 5 transmitted to a household appliance. The display means displays information on the home appliance acquired by the communication means,
The protocol analyzer according to claim 6, wherein the communication unit transmits the changed information to the home appliance when the information on the home appliance is changed via the interface. An analysis method for analyzing communication of a network to which home appliances installed in a facility are connected,
Obtaining location information of the home appliances in the facility via the network;
Obtaining data transmitted and received between the home appliance and the network;
Displaying the floor plan of the facility in which the location information of the home appliance is mapped based on the data and the location information;
Analysis method including Computer
A communication means for communicating with a network to which home appliances are connected;
Storage means for storing floor plan information of a facility where the home appliance is installed;
Via the network, acquisition means for acquiring position information of the home appliance in the facility and data transmitted and received between the home appliance and the network;
Display means for displaying the acquired data and the floor plan in which the position of the home appliance is mapped based on the position information;
Program to function as.

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