JP2017201740A - Wiring device and communication control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiring device capable of improving convenience of an intercom system in which a two-wire cable is used.SOLUTION: A wiring device 400 includes: a two-wire communication network connection part which is connected to an intercom system 200 including a plurality of intercom devices via a two-wire cable 211; a digital communication network connection part which is connected to a packet communication network 300 via a digital communication circuit (311); and a communication control part in which a first packet sent from the packet communication network 300 is analyzed to determine the intercom device which should transmit first information stored in the first packet and which transmits application data to the determined intercom device.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a wiring device connected to a door phone system and a communication control method in the wiring device.

  In recent years, the door phone system has been equipped with a camera on the front door unit, connected to the main unit of the door phone with a two-wire cable, so that not only the voice of the entrance but also the video can be checked from the indoor door phone base unit. It is popular.

  However, many of these currently popular door phone systems perform analog communication using a two-wire cable. For this reason, it is difficult to transmit high quality video and the like in various environments due to waveform distortion or attenuation due to the characteristics of the transmission path. In the case of analog communication, a function for converting an analog signal into digital data is required, such as when the signal is digitized on the receiving side and displayed after image processing, and image quality may be deteriorated at that time.

  Therefore, a technique for performing digital communication between an entrance cordless handset and a doorphone master set using a two-wire cable has been proposed (see, for example, Patent Document 1). According to such a technique, it is possible to transmit and receive high-quality video data and the like of a digital communication system using an existing inexpensive two-wire cable. For this reason, it is possible to upgrade the existing analog communication type door phone system more easily, and further, it is advantageous in terms of cost as compared with the case where a new wiring is laid.

JP 2007-124227 A

  By the way, in an analog intercom system for apartment buildings, conventionally, an entrance communication device (lobby station) installed in a lobby (common entrance) and a door phone device of each dwelling unit are connected by an analog communication system via a wiring device. Connecting is done. If such a wiring device can be connected to an external digital communication line, the convenience of the door phone system can be improved such that each dwelling unit can be connected to the Internet via the wiring device. However, such a wiring device has not been sufficiently studied. However, such a wiring device has not been sufficiently studied.

  An object of the present disclosure is to provide a wiring device and a communication control method capable of improving the convenience of a door phone system using a two-wire cable.

  A wiring device of the present disclosure is connected to a packet communication network via a two-wire communication network connection unit connected to a door phone system including a plurality of door phone devices via one or a plurality of two-wire cables, and a digital communication line. Analyzing the first packet sent from the packet communication network and determining the door phone device to which the first information stored in the first packet should be transmitted, A communication control unit that transmits the first information to the determined door phone device.

  A communication control method of the present disclosure is a communication control method in a wiring device that is connected to a door phone system including a plurality of door phone devices via one or a plurality of two-wire cables, and includes packet communication via a digital communication line. Connecting to a network; analyzing a first packet sent from the packet communication network; determining the door phone device to which the first information stored in the first packet is to be transmitted; Transmitting the first information to the door phone device.

  According to the present disclosure, the convenience of a door phone system using a two-wire cable can be improved.

System configuration diagram showing an example of a configuration of a communication system according to an embodiment of the present disclosure The figure which shows an example of a structure of the transmission signal in the door phone system which concerns on this Embodiment The figure which shows an example of a structure of the ether frame in this Embodiment The block diagram which shows an example of a structure of the wiring apparatus which concerns on this Embodiment The figure which shows an example of the door phone apparatus information table in this Embodiment The figure which shows an example of the network device information table in this Embodiment The figure which shows an example of a structure of the routing control part in this Embodiment. A block diagram showing an example of a configuration of a door phone device in the present embodiment The schematic diagram which shows the mode in case the two-wire cable in this Embodiment is a positive connection 1st schematic diagram which shows the mode in case the 2 wire cable in this Embodiment is reverse connection 2nd schematic diagram which shows a mode in case the 2 wire cable in this Embodiment is reverse connection 3rd schematic diagram which shows the mode when the two-wire cable in this Embodiment is a positive connection The 4th schematic diagram which shows the mode in case the two-wire cable in this Embodiment is a positive connection The flowchart which shows an example of operation | movement of the wiring apparatus based on this Embodiment. The block diagram which shows another example of a structure of the wiring apparatus which concerns on this Embodiment System configuration diagram showing another example of the configuration of the communication system according to the present embodiment

  Hereinafter, an embodiment of the present disclosure will be described in detail with reference to the drawings.

<System overview>
First, an overview of a communication system in which a wiring device according to an embodiment of the present disclosure is used will be described.

  FIG. 1 is a system configuration diagram illustrating an example of a configuration of a communication system in which the wiring device according to the present embodiment is used.

  As illustrated in FIG. 1, the communication system 100 includes a door phone system 200, a packet communication network 300, and a wiring device 400.

The door phone system 200 is a door phone facility laid in an apartment house having N units. The door phone system 200 includes first to N-th door phone master units 210 _{1 to} 210 _N and first to N-th door slave units 220 _{1 to} 220 _N.

In the n-th (n = 1, 2,..., N) dwelling unit, the n-th entrance cordless handset 220 _n installed at the entrance is _n-th installed in the dwelling unit by a two-wire cable 221 n. It is connected to the doorphone master unit 210 _n . The n-th entrance cordless handset 220 _n and the n-th door phone master unit 210 _n use a two-wire cable 221 _n to transmit and receive packet signals by time division duplex.

  Each entrance handset 220 includes a user interface such as a key switch, a camera, a microphone, and a speaker. Each doorphone master unit 210 includes a user interface such as a liquid crystal display with a touch panel, a key switch, a microphone, and a speaker.

  In the following description, door phone master unit 210 and entrance slave unit 220 are appropriately referred to as “door phone devices”.

  The packet communication network 300 includes a switching hub 310, a lobby station 320, a manager's telephone 330, and an internal management device 340, which are installed in the above-mentioned apartment building. The packet communication network 300 includes an external management device 350 installed in a management company for an apartment house.

  The lobby station 320, the manager telephone 330, and the internal management device 340 are connected to the switching hub 310 via LAN (Local Area Network) cables 321, 331, and 341. The lobby station 320, the manager telephone 330, the internal management device 340, and the LAN cables 321, 331, and 341 form a LAN that is a kind of digital communication line. The external management device 350 is connected to the switching hub 310 via the Internet 351 and the router 352.

  The lobby station 320 includes user interfaces such as a key switch, a camera, a microphone, and a speaker. The administrator telephone 330 includes user interfaces such as a key switch, a microphone, and a speaker. Each of the internal management device 340 and the external management device 350 includes a user interface such as a keyboard, a mouse, a microphone, a speaker, and a liquid crystal display.

  In the following description, the switching hub 310, the lobby station 320, the manager telephone 330, the internal management device 340, the router 352, and the external management device 350 are appropriately referred to as “network devices”.

The wiring device 400 controls communication between dwelling units using the door phone system 200 and communication between the door phone system 200 and the packet communication network 300 installed in the above-described apartment house (for example, a manager's room). Communication equipment. Interconnection device 400 via the 2-wire cable ₂₁₁ 1 _{~211 N} first to N, it is connected individually to the indoor apparatus ₂₁₀ 1 to 210 _N of the first to N. Further, the wiring device 400 is connected to the switching hub 310 via the LAN cable 311.

Wiring device 400 transmits / receives a packet signal (hereinafter referred to as “door phone packet”) by time-division duplex using _n-th two-wire cable 211 _n to / from n- _th door phone master unit 210 _n. .

  Each door phone packet stores a data body (hereinafter referred to as “door phone data”) such as video data and audio data. Each door phone packet is assigned control information indicating the source and destination of the door phone packet based on the operation of specifying the other party in the door phone device that is the source of the door phone packet. In addition, the door phone packet includes, for example, an interrupt signal for requesting the start of a call connection with another dwelling unit and voice data in the started call.

  When the control information given to the received door phone packet indicates one of the door phone devices as the destination, the wiring device 400 sends the received door phone packet to the two-wire cable 211 that communicates with the destination door phone device.

  That is, the wiring device 400 realizes an extension call in the apartment house by transferring doorphone data between the doorphone master units 210 as indicated by an arrow 101, for example.

  In addition, the wiring device 400 transmits and receives an Ethernet (registered trademark) frame (hereinafter referred to as “Ethernet frame”) to and from the switching hub 310 via the LAN cable 311. In each Ethernet frame, the data transmission source and destination are described in the header portion based on an operation of specifying the other party in the data transmission source device stored in the Ethernet frame. When the destination of the Ether frame is the wiring device 400, the wiring device 400 receives the Ether frame and extracts the stored data.

  The wiring device 400 analyzes the ether frame (first packet) received from the switching hub 310 (from the packet communication network), and selects the door phone device to which the data (first information) stored in the ether frame is to be transmitted. judge. Then, when the door phone device to which data is to be transmitted is determined, wiring device 400 transmits the data to the determined door phone device.

  Wiring device 400 then analyzes the door phone packet (second information) sent from the door phone device, and determines the network device to which the door phone packet should be transmitted. The wiring device 400 makes such a determination by, for example, the type of information (hereinafter referred to as “information type”) that is given to the doorphone packet based on an operation of specifying the other party in the doorphone device of the transmission source. ”). Such information types include, for example, “call with common entrance”, “call with manager room”, “information communication with manager room”, “alarm to management company”, “communication within door phone system”, etc. Is included.

  Then, when the network device to which the doorphone packet is to be transmitted is determined, the wiring device 400 generates an ether frame storing the doorphone data by using the determined network device as a destination, and sends it to the LAN cable 311.

  That is, the wiring device 400 functions as a kind of switching hub between the door phone system 200 and the packet communication network 300. For example, as shown by an arrow 101, the wiring device 400 relays communication (data transfer) between the door phone device and the network device. )I do.

  The power supply of the wiring device 400 may be received from a commercial power supply or from the switching hub 310 by PoE (Power over Ethernet) using the LAN cable 311.

  In such a communication system 100, for example, a call can be made between each door phone master unit 210 and the lobby station 320 or the manager telephone 330. Further, for example, extension calls between the doorphone master units 210, and simultaneous broadcast communication from the internal management device 340 or the doorphone master unit 210 to each dwelling unit are possible. Moreover, since the communication system 100 does not directly connect the entrance cordless handset 220 of each dwelling unit to the wiring device 400, the wiring cost, maintenance cost, and wiring space of the two-wire cable can be reduced.

  In the present embodiment, the two-wire cables 211 and 221 are connected between the entrance cordless handset 220 and the door phone master unit 210 and between the door phone master unit 210 and the wiring device 400 as described above. . When performing digital communication using a two-wire cable, the two-wire cable has a connection state in which when the transmitting side transmits a signal indicating “1”, the receiving side receives the signal as “1”, that is, Must be in a positive connection state.

  However, in order to reliably prevent the reverse connection, much labor is required, and the working efficiency when wiring the two-wire cable is remarkably lowered.

  Therefore, in the communication system 100 according to the present embodiment, at least one of the wiring device 400, the door phone master unit 210, and the front door unit 220 has a two-wire cable connected or not (reverse connection). And the reception signal / transmission signal is inverted according to the determination result. As a result, the communication system 100 can substantially make the connection by the two-wire cable non-polar, and realize digital communication that is not affected by the connection state of the two-wire cable. The details of the depolarization mechanism will be described later.

<Data structure>
Here, a configuration of data transmitted in door phone system 200 and packet communication network 300 will be described.

  FIG. 2 is a diagram illustrating an example of a configuration of a signal (hereinafter referred to as “door phone signal”) transmitted in the door phone system 200.

  As shown in FIG. 2, the door phone signal 510 includes a plurality of data frames 511. Each data frame 511 has an area of 48000 bits, has a 10 ms period, a bit rate of 4.8 Mbps, and is divided into 24 time slots 512. Therefore, each time slot 512 has an area of 2000 bits = 250 bytes, and has a bit rate of 0.416 ms and a bit rate of 4.8 Mbps.

  Each time slot 512 is divided into a guard space (Guard) of 52 bytes, a preamble field of 4 bytes, a sync field (Sync) of 2 bytes, a control data field of 32 bytes, and a user data field of 160 bytes.

  The guard space is a time for avoiding time slot collision due to a propagation delay time difference, clock jitter, or the like. Preamble data (described later) having a predetermined unique pattern is added to the preamble field. A predetermined sync pattern is added to the sync field. Control data indicating the transmission source, destination, information type, and the like of data (slot information) stored in the subsequent user data field is added to the control data field. Image data and audio data are added to the user data field. Such image data and sound data are, for example, image data and sound data acquired by the entrance child device 220.

  That is, the time slot 512 is a unit for transmitting and receiving information using the two-wire cables 211 and 221 and is the above-described door phone packet.

  FIG. 3 is a diagram illustrating an example of the configuration of an Ethernet frame.

  3, the Ethernet frame 520 includes a preamble 521 including an SFD (Start Frame Delimiter), a MAC header (Media Access Control Header) 522, an IP header (Internet Protocol Header) 523, a TCP / UDP header (Transmission Control Protocol). / User Datagram Protocol Header) 524, a data area 525, and an FCS (Frame Check Sequence) 526.

  However, in the present embodiment, the data area 525 of the Ethernet frame 520 includes, for example, an application packet of a predetermined format including an application header area 527 of 20 bytes (bytes) and an application data area 528 of maximum 1440 bytes. It has become.

  The application header area 527 includes a destination (8 bytes) of data stored in the application data area 528 (hereinafter referred to as “application data”), a transmission source (8 bytes) of application data, a data type (2 bytes) of application data, and application data. This is an area for describing the data length (2 bytes).

  The application data area 528 is an area for storing data transmitted by the network device and data transmitted by the door phone device as application data to be processed by application software of each device (hereinafter referred to as “device application”). is there.

  The device application is preinstalled in each network device, and is software for exchanging information (including video data and audio data) related to the door phone system 200 with the wiring device 400. The device application performs predetermined processing such as video output and audio output in accordance with the information type of the application packet received from the wiring device 400 and the stored application data, and also provides video to the door phone device via the wiring device 400. An application packet that instructs output or audio output is generated and transmitted. The device application is, for example, an IP phone application using SIP (Session Initiation Protocol).

  It should be noted that identification information (for example, a uniquely determined number) of each device used for designating a destination and a transmission source of application data in the predetermined format is previously stored in the communication system 100. Shared. In the predetermined format, identification information (for example, a uniquely determined number) used to indicate the data type of application data such as images, sounds, and commands is also shared in advance in the communication system 100. .

That is, the application header area 527, for example, the application data stored in the application data area 528, the "is transmitted from an external management device 350 to the first indoor apparatus 210 _1, image data of 1280byte" I understand that there is.

  Note that the wiring device 400 sequentially disassembles the received Ethernet frame 520, extracts the application header area 527 and the application data area 528, and specifies the destination intercom device indicated by the application header area 527. Then, the wiring device 400 places the application data in the application data area 528 on the user data area of one doorphone packet, or divides and places it on the user data area of a plurality of doorphone packets, and the destination doorphone device To the two-wire cable 211 connected to.

  Moreover, the wiring device 400 determines whether the destination of the intercom data stored in the received intercom packet is a network device. When the destination is a network device, the wiring device 400 generates an Ethernet frame 520 in which an application header area 527 indicating a data transmission source and an application data area 528 storing application data are stored in the data area 525. Then, the wiring device 400 sends out to the LAN cable 311.

<Device configuration>
Next, the configuration of each device will be described.

  FIG. 4 is a block diagram illustrating an example of the configuration of the wiring device 400.

As shown in FIG. 4, the wiring device 400 includes a two-wire cable connection unit 411, a reception driver 412, a routing control unit 413, a reception data processing unit 414, a transmission data processing unit 415, a transmission data inversion unit 416, and a transmission driver 417. have. Note that the wiring device 400 includes a set of the two-wire cable connection unit 411, the reception driver 412, the transmission data inversion unit 416, and the transmission driver 417 as first to N-th two-wire cables 211 _{1 to} 211 _N (FIG. 1). Corresponding to the reference). In addition, the wiring device 400 includes a two-wire communication control unit 420. The two-wire communication control unit 420 includes a first clock generation unit 421, an intercom packet processing unit 422, a connection state detection unit 423, an application data generation unit 424, an application data bus 425, an application data reproduction unit 426, and an intercom packet generation unit 427. have.

  The above-described two-wire cable connection unit 411 to door phone packet generation unit 427 are mainly functional units for transmitting and receiving door phone packets on the door phone system 200 side.

  In addition, the wiring device 400 includes a LAN cable connection unit 431, a LAN transmission / reception driver 432, an Ethernet (registered trademark) PHY unit (hereinafter, simply referred to as “Ethernet PHY unit”) 433, and a digital communication control unit 440. . The digital communication control unit 440 includes an Ethernet (registered trademark) MAC unit (hereinafter, appropriately referred to as “Ethernet MAC unit”) 441 and a LAN data processing unit 442.

  The LAN cable connection unit 431 to the LAN data processing unit 442 described above are function units for mainly transmitting and receiving an Ethernet frame on the packet communication network 300 side.

  The wiring device 400 includes a communication management unit 450.

  The two-wire cable connection unit 411 includes a connection terminal for the two-wire cable, and is capable of transmitting signals between one end of the two-wire cable 211 on the wiring device 400 side and the reception driver 412 and the transmission driver 417. Connecting.

  The reception driver 412 receives a signal transmitted from the doorphone master unit 210 via the two-wire cable 211 via the two-wire cable connection unit 411. Then, the reception driver 412 outputs the received signal to the routing control unit 413 in a reception section instructed by a switching control signal (SW CON) described later output from the two-wire communication control unit 420.

  The routing control unit 413 sends the reception signal output from the reception driver 412 to the corresponding transmission driver 417 when the destination is the door phone device, and the reception data when the destination is the network device. The data is output to the processing unit 414. Also, the routing control unit 413 outputs a transmission signal, which will be described later, output from the transmission data processing unit 415 to the transmission data inversion unit 416 corresponding to the destination door phone device. Note that the routing control unit 413 performs routing of the signal by operating according to a switching control signal (SW CON), which will be described later, output from the two-wire communication control unit 420.

  The reception data processing unit 414 decodes the reception signal output from the routing control unit 413 and outputs the decoded signal to the door phone packet processing unit 422 (Decoded DATA). The received data processing unit 414 includes a synchronization detection unit and a second clock generation unit (not shown).

  The synchronization detection unit uses a first frequency clock (CLK), which will be described later, output from the first clock generation unit 421, and uses the preamble data included in the reception signal to transmit the reception signal (door phone master unit 210). ) (The timing at the beginning of each bit of the received signal) is detected. The synchronization detection unit outputs a trigger signal serving as a reference for starting clock output to the second clock generation unit at the timing when the unique pattern of the preamble data is detected, and outputs an enable signal (SSCS) for permitting the data reproduction operation. The data is output to the packet processing unit 422.

  The second clock generation unit generates a clock (SSCK) of a second frequency (for example, 4.8 MHz) corresponding to the bit rate of the received signal, and outputs the clock (SSCK) to the door phone packet processing unit 422. The second clock generation unit generates the second frequency clock based on a first frequency clock (CLK) described later output from the first clock generation unit 421 at the timing instructed by the synchronization detection unit. Do it.

  The reception data processing unit 414 operates at a timing (reception mode) designated by an SPI-RW signal described later output from the two-wire communication control unit 420.

  The transmission data processing unit 415 is based on an after-mentioned enable signal (SSCS) and a second frequency clock (SSCK) output from the door phone packet generation unit 427 in response to the door phone packet output from the door phone packet generation unit 427. Modulation processing (encoding). Then, the transmission data processing unit 415 outputs the signal obtained by such modulation processing to the routing control unit 413 as a transmission signal.

  The transmission data processing unit 415 operates at a timing (transmission mode) designated by an SPI-RW signal described later output from the two-wire communication control unit 420.

  The transmission data inverting unit 416 inverts / inverts the transmission signal output from the routing control unit 413 according to an inversion control signal (INV CON) described later output from the connection state detection unit 423 without transmitting the transmission signal. Output to.

  The transmission driver 417 sends a transmission signal to the two-wire cable 211 via the two-wire cable connection unit 411 in the transmission section instructed by the switching control signal (SW CON) from the two-wire communication control unit 420.

  The two-wire communication control unit 420 controls each part of the wiring device 400 on the door phone system 200 side. In addition, the two-wire communication control unit 420 sends a transmission control section (SW CON) that indicates a transmission section that permits transmission and a reception section that permits reception to each transmission driver 417, each reception driver 412, and routing control. To the unit 413.

  The first clock generation unit 421 generates a clock (CLK) having a first frequency (for example, 48 MHz (n = 10)) corresponding to n times the bit rate of the reception signal based on the crystal oscillation, and receives data processing To the unit 414. Such a clock is a clock for sampling the received signal.

  The intercom packet processing unit 422 receives an enable signal (SSCS) output from the reception data processing unit 414 and a second frequency clock (SSCK) in response to the reception signal (Decoded DATA) output from the reception data processing unit 414. Based on the above, a demodulation process is performed. Then, the door phone packet processing unit 422 extracts user data from the door phone packet obtained by the demodulation process, outputs the user data to the application data generation unit 424, and sets the information type of the door phone packet to the application data generation unit 424. To notify.

  Further, door phone packet processing unit 422 outputs the above-described sync pattern included in the door phone packet to connection state detection unit 423.

  For each two-wire cable connection unit 411, the connection state detection unit 423 compares the sync pattern output from the door phone packet processing unit 422 with each of the stored pre-connection check sync pattern and reverse connection check sync pattern. .

  Here, the sync pattern for normal connection check is a sync pattern extracted from the door phone packet when the two-wire cable 211 is in the normal connection. The reverse connection check sync pattern is a sync pattern extracted from the intercom packet when the two-wire cable 211 is reverse connected.

  Note that the positive connection indicates a state in which the two lines constituting the two-wire cable 211 are connected in a predetermined correspondence between the two-wire cable connection unit 411 and the corresponding doorphone master unit 210. The reverse connection means that the two lines constituting the two-wire cable 211 are connected with the corresponding relationship opposite to the predetermined relationship between the two-wire cable connection unit 411 and the corresponding doorphone master unit 210. It shows the state.

  The normal connection check sync pattern and the reverse connection check sync pattern are shared in advance between each door phone device and the wiring device 400.

  The connection state detection unit 423 determines that the corresponding two-wire cable 211 is a normal connection when the sync pattern of the received signal completely matches the sync pattern for the normal connection check. Also, the connection state detection unit 423 determines that the corresponding two-wire cable 211 is reversely connected when the sync pattern of the received data completely matches the sync pattern for reverse connection check. Then, the connection state detection unit 423 outputs an inversion control signal (INV CON) indicating the determination result to the transmission data inversion unit 416.

  Specifically, when the two-wire cable 211 determined to be reverse connection exists, the connection state detection unit 423 is sent to the two-wire cable 211 among the transmission signals output from the routing control unit 413. The transmission data inverting unit 416 is controlled so as to invert the transmission signal. That is, the connection state detection unit 423 performs data processing so that a signal is transmitted with a normal polarity even when the two-wire cable 211 is reversely connected.

  The application data generation unit 424 generates an application packet with an application header added to the data output from the door phone packet processing unit 422, and outputs the application packet to the LAN data processing unit 442 and the application data reproduction unit 426 via the application data bus 425. .

  Specifically, the application data generation unit 424 stores the door phone data in the application data area 528, and stores the application packet described in the application header area 527 with the network device and the device application corresponding to the information type of the door phone packet as a destination. Generate (see FIG. 3). That is, the application data generation unit 424 adds an application header to the door phone data. Then, the application data generation unit 424 outputs the generated application packet to the application data bus 425.

  In addition, when the information transfer in the door phone system 200 is performed in the routing control unit 413 as described later, the application data generation unit 424 may not output the application packet to the application data reproduction unit 426.

  The application data bus 425 is a digital signal transmission path that connects the application data generation unit 424, the LAN data processing unit 442, and the application data reproduction unit 426.

  When the LAN data processing unit 442 receives an application packet from the application data generation unit 424, the LAN data processing unit 442 generates an IP packet storing the application packet (portion of the IP header 523 to the data area 525 in FIG. 3), and the Ethernet MAC unit It outputs to 441 (refer FIG. 3).

  Specifically, the LAN data processing unit 442 stores the application packet in the data area 525, and the IP packet in which the IP address and port of the destination network device of the application packet are described in the IP header 523 and the TCP / UDP header 524 Is generated. In the IP packet, the IP address of the wiring device 400 is described as the source IP address.

  When the LAN data processing unit 442 receives an IP packet destined for the IP address of the wiring device 400 from the Ethernet MAC unit 441, the LAN data processing unit 442 extracts the application packet stored in the IP packet. Then, the LAN data processing unit 442 outputs the obtained application packet to the application data reproduction unit 426 via the application data bus 425.

  When the Ethernet MAC unit 441 receives an IP packet from the LAN data processing unit 442, the Ethernet MAC unit 441 adds a MAC header 522 including the MAC address of the destination network device to the IP packet and adds a MAC frame (MAC header 522 to FIG. 3). Data area 525). Then, the Ethernet MAC unit 441 outputs the obtained MAC frame to the Ethernet PHY unit 433. In the MAC frame, the MAC address of the wiring device 400 is described as the source MAC address. Further, the MAC address of each network device is recognized in advance by the communication management unit 450 when, for example, the connection with each network device is confirmed.

  When the Ethernet MAC unit 441 receives a MAC frame destined for the MAC address of the wiring device 400 from the Ethernet PHY unit 433, the Ethernet MAC unit 441 removes the MAC header 522 from the MAC frame, converts the MAC frame into an IP packet, and performs LAN data processing. Output to the unit 442.

  When receiving the MAC frame from the Ether MAC unit 441, the Ether PHY unit 433 adds the preamble 521 and the FCS 526 to the MAC frame, converts the MAC frame into an Ether frame 520 (see FIG. 3), and outputs the Ethernet frame to the LAN transmission / reception driver 432.

  When the Ethernet PHY unit 433 receives the Ethernet frame 520 from the LAN transmission / reception driver 432, the Ethernet PHY unit 433 removes the preamble 521 and the FCS 526 from the Ethernet frame 520, converts the Ethernet frame 520 into a MAC frame, and outputs the MAC frame to the Ethernet MAC unit 441.

  When receiving the Ethernet frame 520 from the Ethernet PHY unit 433, the LAN transmission / reception driver 432 transmits the Ethernet frame 520 to the LAN cable 311 (see FIG. 1) via the LAN cable connection unit 431. That is, the LAN transmission / reception driver 432 transmits the Ethernet frame 520 to the destination network device.

  Also, when the Ethernet frame 520 is sent from the LAN cable 311 via the LAN cable connection unit 431, the LAN transmission / reception driver 432 passes the Ethernet frame 520 to the Ethernet PHY unit 433. That is, the LAN transmission / reception driver 432 receives the Ethernet frame 520 whose destination is the wiring device 400.

  The LAN cable connection unit 431 includes a connection terminal for a LAN cable, and connects one end of the LAN cable 311 on the wiring device 400 side and the LAN transmission / reception driver 432 in a state where signals can be transmitted.

  When the application data reproduction unit 426 receives an application packet from the LAN data processing unit 442 (or the application data generation unit 424), the application data reproduction unit 426 checks the application header area 527 and notifies the communication management unit 450 of the check result. Then, the application data reproduction unit 426 extracts the application data stored in the application data area 528 (separates the application header area 527) and outputs the application data to the intercom packet generation unit 427. At this time, the application data reproduction unit 426 notifies the door phone packet generation unit 427 of the destination door phone device, the data type, and the length information indicated by the application header area 527.

  When receiving the data from the application data playback unit 426, the door phone packet generation unit 427 generates (reconstructs) a door phone packet destined for the notified door phone device based on the notified data type and length information.

  Specifically, the intercom packet generation unit 427 writes the data output from the application data reproduction unit 426 as it is or after being divided into the user data field of each time slot, and the control data is controlled for each time slot. Write to the data field. Further, the door phone packet generation unit 427 writes preamble data and a sync pattern in each time slot, and generates a door phone packet. Furthermore, the door phone packet generation unit 427 generates a transmission enable signal (SSCS) and a transmission second frequency (for example, 4.8 MHz) clock (SSCK). Then, the door phone packet generation unit 427 outputs the door phone packet (Transmit DATA) to the transmission data processing unit 415 in synchronization with the transmission enable signal (SSCS) and the clock (SSCK).

  The door phone packet generation unit 427 may output control data related to the operation of the door phone device to the transmission data processing unit 415.

  When the communication management unit 450 receives information indicating the destination doorphone device of the application data from the application data reproduction unit 426, the communication management unit 450 can transmit the control terminal (SW CON) of the two-wire communication control unit 420 to the destination doorphone device. Set the communication path as follows. Note that the transmission / reception settings of the transmission / reception drivers (DRV1 to DRV_N) are known to the communication management unit 450.

  Specifically, the communication management unit 450 holds in advance a network device information table in which information types are associated with device applications and network devices. Then, the communication management unit 450 controls the door phone packet generation processing by the door phone packet generation unit 427 and the ether frame generation processing by the LAN data processing unit 442 based on the network device information table. Moreover, the communication management part 450 has previously hold | maintained the door phone apparatus information table which matched the control content of each reception driver 412 and each transmission driver 417 with a door phone apparatus. Communication management unit 450 controls application packet generation processing by application data generation unit 424 and output of a switching control signal (SW CON) by two-wire communication control unit 420 based on the intercom device information table.

  FIG. 5 is a diagram illustrating an example of a door phone device information table.

  As illustrated in FIG. 5, the door phone device information table 610 describes a cable connection unit 612 and a driver control 613 for each destination 611. The destination 611 is a door phone device that can be designated as the destination of the application packet. The cable connection unit 612 is information indicating the two-wire cable connection unit 411 connected to the door phone device of the destination 611. The driver control 613 is information indicating the content of control for the reception driver 412 and the transmission driver 417 of the two-wire cable connection unit 411.

For example, a cable connection unit 612 called “first two-wire cable connection unit” and a driver control 613 “ON first transmission driver” are described in association with the destination 611 “first door phone device”. Yes. Communication management unit 450, for example, when the application packet to the first intercom device destined is present, first the first door phone device intercom packets destined, as the first transmission driver 417 ₁ only ON to deliver from 2-wire cable connection 411 ₁ controls each part of the wiring device 400.

  FIG. 6 is a diagram illustrating an example of the network device information table.

  As illustrated in FIG. 6, the network device information table 620 describes a destination device application 622 and a destination network device 623 for each information type 621. As described above, the information type 621 is a type of information to be transmitted / received by the door phone packet. The destination device application 622 is a device application that is the destination of the application packet of the information type 621 or a device unit inside the wiring device 400. The destination network device 623 is a network device that is the destination of the application packet of the information type 621.

  For example, a destination device application 622 “Lobby Station Call App” and a destination network device 623 “Lobby Station” are described in association with the information type 621 “Call with Common Entrance”. For example, when the communication management unit 450 receives a door phone packet of the information type “call with a common entrance” from the door phone device, the communication management unit 450 uses the call application of the lobby station 320 as the destination and the lobby station 320 as the destination. Each part of the wiring device 400 is controlled so that the Ethernet frame to be generated is generated.

  Although not shown, the wiring device 400 is, for example, a CPU (Central Processing Unit), a storage medium such as a ROM (Read Only Memory) storing a control program, a working memory such as a RAM (Random Access Memory), and a communication. It has a circuit. In this case, the function of each unit described above is realized by the CPU executing the control program.

  With such a configuration, the wiring device 400 transfers information between each door phone device of the door phone system 200 using a two-wire cable and each network device of the packet communication network 300 using a LAN cable. It can be done with.

<Configuration of routing unit>
Here, the configuration of the routing control unit 413 will be described.

  FIG. 7 is a diagram illustrating an example of the configuration of the routing control unit 413. The configuration around the routing unit is also illustrated.

In FIG. 7, the routing control unit 413 includes an OR circuit (OR1) 461 and a switch circuit (SW1) 462. The input side of the OR circuit 461 is connected to the output side of the reception drivers 412 _{1 to} 412 _N , and the output side of the OR circuit 461 is connected to the input side of the reception data processing unit 414. The switch circuit 462 is connected to the first contact (symbol (1)) connected to the output side of the transmission data processing unit 415 and to the output side of the OR circuit 461 (input side of the reception data processing unit 414). And a second contact (symbol (2)). The switch circuit 462 is connected to the input side of the transmission data inverting units 416 _{1 to} 416 _N , and is selective to the first contact (symbol (1)) and the second contact (symbol (2)). It has a common terminal (symbol (3)) to be connected.

  The connection state of the switch circuit 462 is controlled by an SPI-RW signal output from the two-wire communication control unit 420 and indicating the reception mode / transmission mode.

  For example, when receiving a doorphone packet whose information type is “communication within the doorphone system”, the two-wire communication control unit 420 determines to perform communication within the doorphone system 200 between the transmission source and the destination of the doorphone packet. . Then, the two-wire communication control unit 420 outputs an SPI-RW signal indicating “reception mode” to the switch circuit 462. In response to the signal, the switch circuit 462 connects the second contact (symbol (2)) to the common terminal (symbol (3)). The operations of each reception driver 412 and each transmission driver 417 are controlled in units of door phone devices for each time slot. As a result, in the routing control unit 413 (without passing through the two-wire communication control unit 420), communication relay between the door phone devices is performed.

  Further, for example, when receiving an application packet whose destination is the door phone device from the digital communication control unit 440, the two-wire communication control unit 420 determines to transfer information from the packet communication network 300 to the door phone system 200. Then, the two-wire communication control unit 420 outputs an SPI-RW signal indicating “transmission mode” to the switch circuit 462. In response to the signal, the switch circuit 462 connects the first contact (symbol (1)) to the common terminal (symbol (3)). The operation of each transmission driver 417 is controlled in units of door phone devices for each time slot. As a result, information transmission from the network device to the door phone device is relayed.

  Regardless of the connection state of the switch circuit 462, all received door phone packets are output to the reception data processing unit 414. As a result, information transmission from the door phone device to the network device is relayed.

  In the case of a specification that does not perform communication in the door phone system 200, or when information transfer in the door phone system 200 is performed in the two-wire communication control unit 420 as described above, the first contact (symbol (1 )) May always be kept connected to the common terminal (symbol (3)).

<Composition of door phone equipment>
Next, the configuration of the door phone device will be described. Here, the configuration of door phone master unit 210 will be described.

  FIG. 8 is a block diagram showing an example of the configuration of the door phone master unit 210 as the door phone device.

  In FIG. 8, the intercom base unit 210 includes a two-wire cable connection unit 711, a reception driver 712, a routing control unit 713, a reception data processing unit 714, a transmission data processing unit 715, a transmission data inversion unit 716, and a transmission driver 717. doing. The doorphone master unit 210 includes a doorphone control unit 720, a display unit 731, a key input unit 732, a voice I / F (interface) unit 733, a speaker 734, and a microphone 735.

  The doorphone master unit 210 includes a pair of the two-wire cable connection unit 711, the reception driver 712, and the transmission driver 717, the two-wire cable 211 connected to the wiring device 400, and the two connected to the entrance terminal 220. Two cables are provided corresponding to the wire cables 221 (see FIG. 1). Further, the transmission data reversing unit 716 is arranged only in the system connected to the wiring device 400, but may be arranged in the system connected to the entrance cordless handset 220.

The functions of the respective units of the two-wire cable connection unit 711 to the transmission driver 717 are substantially the same as those of the two-wire cable connection unit 411 to the transmission driver 417 (see FIG. 4) of the wiring device 400, and thus description thereof is omitted. However, the connection destination of the first two-wire cable connection portion 711 ₁ is the wiring device 400, and the connection destination of the second two-wire cable connection portion 711 _{2 is} the front door device 220.

  The intercom control unit 720 includes a first clock generation unit 721, an intercom packet processing unit 722, a connection state detection unit 723, and an intercom packet generation unit 727.

  The first clock generation unit 721 to the door phone packet generation unit 727 are substantially the same as the first clock generation unit 421, the door phone packet processing unit 422, the connection state detection unit 423, and the door phone packet generation unit 427 (see FIG. 4) of the wiring device 400. Therefore, the description about this is omitted. However, the door phone packet processing unit 722 outputs digital video data to the display unit 731 and digital audio data to the audio I / F unit 733 among user data acquired from the door phone packet. Also, the door phone packet generation unit 727 stores the response signal output from the key input unit 732 and the digital audio data output from the audio I / F unit 733 in the door phone packet, and outputs them to the transmission data processing unit 715. To do.

  The display unit 731 includes a liquid crystal display, reproduces the digital video data output from the door phone packet processing unit 722 of the door phone control unit 720, and displays the entrance video. When the digital video data is data obtained by performing a predetermined moving image compression process, the display unit 731 performs a predetermined moving image expansion process on the data to display a video.

  The audio I / F unit 733 converts the digital audio data output from the door phone packet processing unit 722 of the door phone control unit 720 into analog audio data, adjusts the signal level, and outputs the analog audio data to the speaker 734. Also, the audio I / F unit 733 adjusts the signal level of the analog audio data output from the microphone 735, converts the analog audio data into digital audio data, and outputs the digital audio data to the door phone packet generation unit 727 of the door phone control unit 720. Such analog / digital conversion is performed by an A / D, D / A converter (not shown).

  The key input unit 732 includes a response button. When the response button is operated, the key input unit 732 outputs a response signal indicating that to the door phone packet generation unit 727 of the door phone control unit 720.

  The speaker 734 converts the analog audio data output from the audio I / F unit 733 into audio and outputs it.

  The microphone 735 collects ambient sound, converts it into analog sound data, and outputs it to the sound I / F unit 733.

  Note that the audio I / F unit 733 generates data obtained by performing a predetermined audio compression process on the data obtained by digitally converting the analog audio data output from the microphone 735, as digital audio data, and the door phone packet generation unit 727. May be output. In addition, when the digital audio data output from the intercom packet processing unit 722 is data obtained by performing a predetermined audio compression process, the audio I / F unit 733 performs a predetermined audio expansion process on the data. After that, digital / analog conversion is performed.

  Although not shown, door phone parent device 210 includes, for example, a CPU, a storage medium such as a ROM storing a control program, a working memory such as a RAM, and a communication circuit. In this case, the function of each unit described above is realized by the CPU executing the control program.

  With such a configuration, the door phone master unit 210 is connected to each of the entrance cordless handset 220 and the wiring device 400 regardless of whether the connection state of the two-wire cable is normal (in an apparently non-polar state). The two-wire cable can be used to send and receive information.

  The doorphone master unit 210 may transmit control data related to the operation of the entrance slave unit 220 to the entrance slave unit 220. Such control data controls, for example, camera operation (data rate, pan, tilt, light, shutter, filter, and other operations) of the door unit 220 and operations of various sensor devices provided in the door unit 220. A control signal is included.

  Further, the entrance handset 220 has substantially the same configuration as that of the door phone master set 210. However, the entrance cordless handset 220 has a camera unit including a digital camera and a key input unit including a call button, does not have a display unit, and has a system connected to a two-wire cable 221 leading to the door phone master unit 210. ing. When the call button is operated, the front door device 220 transmits a signal indicating that to the door phone parent device 210. Then, the front door unit 220 starts transmitting digital video data obtained by photographing the video of the front door to the door phone master unit 210, converts the voice data sent from the door phone base unit 210 into voice, and outputs it. To do.

<Non-polarization of 2-wire cable>
Here, a mechanism for non-polarization of digital communication using a two-wire cable will be described.

  FIG. 9 is a schematic diagram illustrating a state in which the two-wire cable 211 or the two-wire cable 221 (hereinafter, appropriately referred to as “two-wire cable”) is in a positive connection state. 10 to 13 are schematic diagrams illustrating a state where the two-wire cable is in a reverse connection state.

  In addition, in FIGS. 9-13, illustration is abbreviate | omitted about parts other than the part closely related to non-polarization of the digital communication which uses a two-wire cable. 9 to 13, the wiring device 400 and the entrance cordless handset 220 are shown in common as devices that are connected to the doorphone master phone 210 via a two-wire cable. However, the reference numerals of the respective parts are given the reference numerals of the respective parts of the wiring device 400 and the door phone master unit 210.

  9-13, each of wiring device 400 / entrance unit 220 and door phone base unit 210 (hereinafter collectively referred to as “device” as appropriate) includes a transmission data inversion unit and a reception data inversion unit. And As described above, the transmission data inversion unit inputs the inversion control signal (INV CON) output from the connection state detection unit, and inverts / inverts the transmission signal output from the transmission data processing unit according to the signal. Without being transmitted to the transmission driver. As will be described later (see FIG. 15), the reception data inversion unit inputs the inversion control signal (INV CON) output from the connection state detection unit, and inverts the reception signal output from the reception driver according to the signal. It is an apparatus unit that outputs to the received data processing unit without / inverting.

  9 to 13, the transmission data inversion unit and the reception data inversion unit that do not invert the signal (the state in which the signal is passed through as it is) are indicated by broken lines. In addition, two lines of the two-wire cable 211/221 in FIGS. 9 to 13 indicate two cables constituting the two-wire cable 211 or two cables constituting the two-wire cable 221.

  As shown in FIG. 9, when the two-wire cable is positively connected, the polarities match between the devices on both sides of the two-wire cable. Accordingly, both devices have a signal (hereinafter referred to as “upstream signal”) 631 directed to the doorphone master unit 210 and a signal (hereinafter referred to as “downstream signal”) 632 directed from the doorphone master unit 210 to the destination. In either case, it is not necessary to perform signal inversion. Therefore, all transmission data inversion units 416/716 and reception data inversion units 418/718 of each device do not invert signals.

  On the other hand, as shown in FIGS. 10 to 13, when the two-wire cable is reversely connected, the polarity is reversed between the devices on both sides of the two-wire cable. Therefore, it is necessary to perform signal inversion in either device for both the upstream signal 631 and the downstream signal 632.

  Therefore, for example, as shown in FIG. 10, in both devices, the connection state detection unit 423/723 detects reverse connection, and when the reverse connection is detected, the transmission data inversion unit 416/716 performs signal inversion. Start. In this case, each device does not necessarily need to include the reception data inverting unit 418/718 (see FIGS. 4 and 8).

  Alternatively, for example, as shown in FIG. 11, when reverse connection is detected in both devices, the reception data inversion unit 418/718 starts signal inversion. In this case, each device does not necessarily need to include the transmission data inverting unit 416/716.

  Or, for example, as shown in FIG. 12 and FIG. 13, in only one device, the connection state detection unit 423/723 detects reverse connection, and when reverse connection is detected, the transmission data inversion unit of the device At 416/716 and the reception data inverting unit 418/718, signal inversion is started. In this case, the other device does not necessarily need to include the connection state detection unit 423/723, the transmission data inversion unit 416/716, and the reception data inversion unit 418/718.

  As described above, the communication system 100 detects the connection state detection unit when the two-wire cable is in the reverse connection state, and both the upstream signal and the downstream signal according to the detection result of the connection state detection unit. A transmission data inversion unit / reception data inversion unit for inverting the signal is provided. Thereby, the communication system 100 can make the connection by a two-wire cable substantially non-polar.

<Operation of the device>
Next, the operation of the wiring device 400 will be described.

  FIG. 14 is a flowchart illustrating an example of the operation of the wiring device 400.

  In step S1010, the communication management unit 450 determines whether the LAN data processing unit 442 has received an Ethernet frame storing an application packet of a predetermined format. If the corresponding Ethernet frame is received (S1010: YES), communication management unit 450 advances the process to step S1020. If the corresponding Ethernet frame has not been received (S1010: NO), communication management unit 450 advances the process to step S1050 described later.

  In step S1020, the communication management unit 450 determines the destination of the application packet from the application header area 527 (see FIG. 3) in the data area 525 (application packet) of the Ethernet frame.

  In step S1030, the communication management unit 450 selects the two-wire cable connection unit 411 that should transmit the application data stored in the application data area 528 from the destination of the application packet based on the door phone device information table 610 (see FIG. 5). judge.

  In step S1040, the communication management unit 450 controls each unit of the wiring device 400, extracts application data from the application packet, stores the application data in the door phone packet, and transmits the determined data from the determined two-wire cable connection unit 411. Control each part.

  In step S1050, communication management unit 450 determines whether doorphone packet processing unit 422 has received an intercom packet. If the corresponding door phone packet is received (S1050: YES), communication management unit 450 advances the process to step S1060. In addition, when the doorphone packet is not received (S1050: NO), communication management unit 450 advances the process to step S1120 described later.

  In step S1060, the communication management unit 450 determines the destination of the intercom data based on the information type of the received intercom packet based on the network device information table 620 (see FIG. 6).

  In step S1070, communication management unit 450 determines whether the destination of the door phone data is a door phone device. If the destination is a door phone device (S1070: YES), communication management unit 450 advances the process to step S1080. In addition, when the destination is not a door phone device, that is, when the destination is a network device (S1070: NO), communication management unit 450 advances the process to step S1100 described later.

  In step S1080, the communication management unit 450 determines, based on the door phone device information table 610 (see FIG. 5), the two-wire cable connection unit 411 that should transmit the door phone data from the door phone data destination.

  In step S <b> 1090, the communication management unit 450 controls each unit of the wiring device 400 to store the doorphone data in the doorphone packet again and send it from the determined two-wire cable connection unit 411.

  In step S1100, the communication management unit 450 controls each unit of the wiring device 400, generates an application header area 527 indicating a destination device application, stores door phone data in the application data area 528, and generates an application packet. .

  In step S1110, the communication management unit 450 controls each unit of the wiring device 400, generates an Ethernet frame storing the application packet, and transmits it to the destination network device.

  In step S1120, the communication management unit 450 determines whether or not an end of processing has been instructed by a user operation or the like. If the communication management unit 450 is not instructed to end the process (S1120: NO), the process returns to step S1010. In addition, when instructed to end the process (S1120: YES), the communication management unit 450 ends the series of processes.

  By such an operation, the wiring device 400 transfers the stored information every time a doorphone packet is sent from the doorphone system 200 and every time an ether frame is sent from the packet communication network 300. I can do things.

For example, the wiring device 400 from the second indoor apparatus 210 _2, information type is "doorphone system communication" and has received the intercom packets to the indoor apparatus 210 _N of the N destination. In this case, the wiring device 400, a door phone packet storing intercom data doorphone packets received, transmitted from the two-wire cable connection 411 _N of the N. In this way, the wiring device 400 realizes an extension call in the apartment house (arrow 101 in FIG. 1).

Further, for example, it is assumed that the wiring device 400 receives an Ethernet frame storing application data destined for the _second doorphone parent device 2102 from the external management device 350. In this case, the wiring device 400, a door phone packet storing application data received, transmitted from the second two-wire cable connection 411 _2. Thus, the wiring device 400 relays communication between the external management apparatus 350 and the second indoor apparatus 210 ₂ (arrow 102 in FIG. 1).

  The connection call between the wiring device 400 and each network device is established using, for example, a SIP server. However, when the packet communication network 300 is small, such a connection call may be established by performing a one-to-one negotiation based on a list of connected devices.

  Note that the communication management unit 450 receives a request to start communication between the network device and the door phone device, or between the door phone device and another door phone device, and a response to the request (when the connection is confirmed). ), The connection between the corresponding devices may be confirmed. That is, the communication management unit 450 does not determine the necessity of information transfer between devices and the transfer route for each reception of an Ether frame or an intercom packet, but maintains the determination result until the corresponding communication is completed. May be.

  As described above, the wiring device 400 according to the present embodiment connects to the door phone system 200 including a plurality of door phone devices via one or a plurality of two-wire cables 211 (two-wire communication network connection unit ( A two-wire cable connection unit 411 to a transmission driver 417, an intercom packet processing unit 422, a connection state detection unit 423, and an intercom packet generation unit 427). In addition, the wiring device 400 includes a digital communication network connection unit (LAN cable connection unit 431 to LAN data processing unit 442) that is connected to the packet communication network 300 via a LAN cable 311 (digital communication line). . Then, the wiring device 400 analyzes the ether frame (first packet) sent from the packet communication network 300, and selects a door phone device to which application data (first information) stored in the ether frame is to be transmitted. The communication control unit (two-wire communication control unit 420, digital communication control unit 440, communication management unit 450) that determines and transmits application data to the determined door phone device is included.

  Thereby, wiring device 400 according to the present embodiment can improve the convenience of door phone system 200 using a two-wire cable.

<Other examples of device configuration>
Note that the specific configuration of the wiring device 400 is not limited to the above example. For example, the wiring device 400 may include a two-wire communication control unit 420 for each two-wire cable connection unit 411.

  FIG. 15 is a block diagram illustrating another example of the configuration of the wiring device, and corresponds to FIG. The same parts as those in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted.

15, wiring apparatus 400, corresponding to the first to two-wire cable connecting unit ₄₁₁ 1 _{~411 N} of the N, 2 of the first to N connected in parallel to the digital communication control unit 440 Line communication blocks 810 _{1 to} 810 _N are included.

  Each of the two-wire communication blocks 810 includes a two-wire cable connection unit 411, a reception driver 412, a reception data processing unit 414 to a transmission driver 417, and a two-wire communication control unit 420 shown in FIG. 418. In the wiring device 400, instead of the communication management unit 450 of FIG. 4, a door phone side communication management unit 451 arranged for each two-wire communication control unit 420 and a network side communication management unit 452 arranged in the digital communication control unit 440. And have. Further, the wiring device 400 does not have the routing control unit 413 of FIG.

  The application data generation unit 424 and the application data reproduction unit 426 of each two-wire communication block 810 are connected to the LAN data processing unit 442 of the digital communication control unit 440 via a common application data bus 425. In each two-wire communication block 810, the output side of the reception driver 412 and the input side of the reception data processing unit 414 are connected to the reception data inversion unit 418, and the output side of the transmission data processing unit 415 and the input of the transmission driver 417 The side is connected to the transmission data inverting unit 416.

  The reception data inversion unit 418 receives the inversion control signal (INV CON) output from the connection state detection unit 423, and inverts / inverts the reception signal output from the reception driver 412 according to the signal. The data is output to the reception data processing unit 414.

  In addition, when such a reception data reversing unit 418 is provided, since all necessary polarity determination processing can be performed on the wiring device 400 side, the connection state detection unit 723 and the transmission data reversing unit 716 of the doorphone parent device 210 are unnecessary. Can be. Alternatively, the transmission data reversing unit 716 of the doorphone master unit 210 can be fixed in a state where the transmission signal is not reversed.

The N doorphone side communication management unit 451 and the network-side communication management unit 452 provided in the two-wire communication block ₈₁₀ 1 _{~810 N} first to N, via the management data bus 453, communicatively connected Has been. The door phone side communication management unit 451 performs at least a function related to the door phone device connected to the two-wire cable connection unit 411 among the functions of the communication management unit 450 of FIG. 4, and transmits necessary information to the network side communication management unit 452. To notify. Further, the network side communication management unit 452 exhibits at least a function related to the network device among the functions of the communication management unit 450 in FIG. 4 and notifies the door phone side communication management unit 451 of necessary information.

That is, the first through the N-th two-wire communication block ₈₁₀ 1 _{~810 N N} pieces of doorphone side communication management unit 451 provided in the network-side communication management unit 452 and the management data bus 453, as a whole, Fig. 4 performs the same function as the communication management unit 450 of FIG.

  According to such a configuration, the wiring device 400 can simultaneously perform transmission / reception processing of doorphone packets with respect to a plurality of doorphone master units 210, and further, the doorphone packets can be transmitted to the doorphone master units 210 with different contents. Can be. Note that the configuration of FIG. 4 has the advantage that the device scale is smaller than the configuration of FIG. 15, and the size and cost of the device can be reduced.

  As another configuration of the wiring device 400, the application data generation unit 424 and the application data reproduction unit 426 can be combined as one device unit.

<Other examples of system configuration>
Further, the specific configuration of the communication system 100 is not limited to the above-described example. For example, the communication system 100 may include a plurality of wiring devices 400.

  FIG. 16 is a system configuration diagram illustrating another example of the configuration of the communication system 100, and corresponds to FIG. The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 16, the communication system 100 includes a first wiring device 400 ₁ connected to a packet communication network (not shown) via a _first LAN cable 3111, and a second LAN cable 311 _2. and a second wiring 400 ₂ connected similarly to the packet communication network.

The first wiring 400 ₁ and the second LAN cable 311 ₂ are connected to each other by a third of the LAN cable 311 _3. The first wire unit 400 ₁ via the two-wire cable ₂₁₁ 1-1 _{~211 1-N} of the first 1-1 the 1-N, the indoor apparatus 210 of the 1-1 second 1-N _{1-1 to} 210 _1-N are connected. The ₂ second wiring 400, through a two-wire cable ₂₁₁ 2-1 _{~211 2-M} of the 2-1 second-M, the indoor apparatus 210 of the 2-1 second-M _{2-1 to} 210 _2-M are connected. Note that the illustration and description of the entrance cordless handset 220 and the two-wire cable 221 are omitted.

  Although not shown, each wiring device 400 has a plurality of LAN cable connection portions 431 and performs communication for each LAN cable. That is, each wiring device 400 regards the other wiring device 400 as a network device of the packet communication network, and communicates with the other wiring device 400. Thereby, the communication system 100 can cascade-connect the several wiring apparatus 400, for example, when the scale of the door phone system 200 is large, can distribute processing load to the several wiring apparatus 400. FIG.

<Other modifications of the present embodiment>
In the embodiment described above, the case where the door phone device connected to each door phone master unit 210 is only the entrance slave unit 220 has been described. However, each door phone master unit 210 includes, in addition to the entrance slave unit 220, Various other optional devices such as an extension monitor may be connected. When an optional device is connected in addition to the entrance cordless handset 220, the number of sets including the two-wire cable connection unit 711, the reception driver 712, the transmission data inversion unit 716, and the transmission driver 717 in FIG. 8 increases. Become.

  Further, the door phone device and the network device with which the wiring device 400 communicates are not limited to the above example. For example, in the case of FIG. 15, the door phone device with which the wiring device 400 communicates may be the entrance cordless handset 220 or an additional monitor. In both cases of FIGS. 4 and 15, the door phone device and the network device with which the wiring device 400 communicates may be a smartphone used by a resident of an apartment house.

  Further, the digital communication line and the packet communication network to which the wiring device 400 is connected are not limited to the above example. For example, the digital communication line to which the wiring device 400 is connected may be a digital wireless communication line such as LTE (Long Term Evolution), and the packet communication network may be a mobile phone network.

  Further, a part of the configuration of the wiring device 400 may be physically separated from other parts of the configuration of the wiring device 400. In this case, it is necessary that the plurality of separated parts include communication units for performing communication with each other.

<Summary of this disclosure>
A wiring device of the present disclosure is connected to a packet communication network via a two-wire communication network connection unit connected to a door phone system including a plurality of door phone devices via one or a plurality of two-wire cables, and a digital communication line. Analyzing the first packet sent from the packet communication network and determining the door phone device to which the first information stored in the first packet should be transmitted, A communication control unit that transmits the first information to the determined door phone device.

  In the wiring device, the packet communication network includes a plurality of network devices, and the communication control unit analyzes a second packet sent from the door phone device and stores the second packet in the second packet. The second network information to be transmitted may be determined, and the second information may be transmitted to the determined network device.

  Further, in the above wiring device, the two-wire communication network connection unit switches between the transmission section and the reception section in time division with each of the plurality of door phone devices, and the polarity of the two-wire cable is changed periodically. Digital transmission using the two-wire cable may be performed by reversing.

  In the wiring device, the first packet describes a destination of the first information, and the two-wire communication network connection unit individually connects to each of the plurality of two-wire cables. The control unit controls communication using the two-wire cable for each of the two-wire cables, and sends the first information to the two-wire cable connected to the destination of the first information. May be.

  In the wiring device, the first packet is an Ethernet (registered trademark) packet, and the communication control unit determines that a data area of the first packet is an application header area and an application data area having a predetermined format. When configured, the information in the application data area may be sent as the first information to the two-wire cable connected to the destination indicated by the application header area.

  In the wiring device, the communication control unit generates an Ethernet (registered trademark) packet in which an application header area and an application data area having a predetermined format are stored in a data area in response to the second information. The information may be transmitted to the digital communication line, information indicating a transmission source of the second information may be described in the application header area, and the second information may be stored in the application data area.

  In the wiring device, the communication control unit controls communication using the two-wire cable so that the reception of the second packet is performed in a time division manner between the plurality of two-wire cables. Also good.

  In the wiring device, the communication control unit is provided for each of the two-wire cables, and includes a plurality of two-wire communication control units that transmit the first information and receive the second packet; A digital communication control unit that receives one packet and transmits the second information, and the first information and the second information between the plurality of two-wire communication control units and the digital communication control unit. A communication management unit that controls transfer of information.

  In the wiring device, the two-wire communication network connection unit includes a transmission driver and a reception driver for each of the two-wire cables, and the communication control unit performs the operation of the transmission driver and the operation of the reception driver. You may control.

  Further, in the wiring device, the two-wire communication network connection unit is extracted from the reception signal when the two-wire cable is positively connected to the reception signal sent via the two-wire cable. And / or a sync pattern extracted from the received signal when the two-wire cable is reversely connected to the received signal. Whether or not a reverse connection check sync pattern is included, and in accordance with the result of the determination, inversion processing on the received signal sent via the two-wire cable after the determination, And / or an inversion process for a transmission signal sent to the two-wire cable after the determination may be performed.

  A communication control method of the present disclosure is a communication control method in a wiring device that is connected to a door phone system including a plurality of door phone devices via one or a plurality of two-wire cables, and includes packet communication via a digital communication line. Connecting to a network; analyzing a first packet sent from the packet communication network; determining the door phone device to which the first information stored in the first packet is to be transmitted; Transmitting the first information to the door phone device.

  The wiring device and the communication control method according to the present disclosure are useful as providing a wiring device and a communication control method capable of improving the convenience of the door phone system using a two-wire cable.

DESCRIPTION OF SYMBOLS 100 Communication system 200 Door phone system 210 Door phone main | base station 211,221 Two-wire cable 220 Entrance cordless handset 300 Packet communication network 311,321,331,341 LAN cable 310 Switching hub 320 Lobby station 330 Manager's telephone 340 Internal management apparatus 350 External Management device 351 Internet 352 Router 400 Wiring device 411, 711 Two-wire cable connection unit 412, 712 Reception driver 413, 713 Routing control unit 414, 714 Reception data processing unit 415, 715 Transmission data processing unit 416, 716 Transmission data inversion unit 417 , 717 Transmission driver 418, 718 Reception data inversion unit 420 Two-wire communication control unit 421, 721 First clock generation unit 422, 722 Door phone Connection processing unit 423, 723 connection state detection unit 424 application data generation unit 425 application data bus 426 application data reproduction unit 427, 727 door phone packet generation unit 431 LAN cable connection unit 432 LAN transmission / reception driver 433 Ethernet PHY unit 440 digital communication control unit 441 Ether MAC unit 442 LAN data processing unit 450 Communication management unit 461 OR circuit 462 Switch circuit 720 Door phone control unit 731 Display unit 732 Key input unit 733 Audio I / F unit 734 Speaker 735 Microphone 453 Management data bus 810 Two-line communication block

Claims (11)

A two-wire communication network connection unit for connecting to a door phone system including a plurality of door phone devices via one or a plurality of two-wire cables;
A digital communication network connection unit for connecting to a packet communication network via a digital communication line;
The first packet sent from the packet communication network is analyzed to determine the door phone device to which the first information stored in the first packet is to be transmitted, and to the determined door phone device A communication control unit for transmitting the first information,
Wiring device. The packet communication network includes a plurality of network devices,
The communication control unit
The second packet sent from the door phone device is analyzed to determine the network device to which the second information stored in the second packet should be transmitted, and the determined network device is sent to the determined network device. 2 information is sent,
The wiring device according to claim 1. The two-wire communication network connection unit is
Digital transmission using the two-wire cable is performed by switching the transmission section and the reception section in a time-sharing manner with each of the plurality of door phone devices and periodically inverting the polarity of the two-wire cable. Do,
The wiring device according to claim 2. The first packet describes a destination of the first information;
The two-wire communication network connection unit is
Individually connecting to each of the plurality of two-wire cables;
The communication control unit
Controlling communication using the two-wire cable for each of the two-wire cables, and sending the first information to the two-wire cable connected to the destination of the first information;
The wiring device according to claim 3. The first packet is an Ethernet packet;
The communication control unit
When the data area of the first packet is composed of an application header area and an application data area having a predetermined format, the information of the application data area is connected to the destination indicated by the application header area as the first information. Sent to the two-wire cable
The wiring device according to claim 4. The communication control unit
Corresponding to the second information, an Ethernet packet in which an application header area and an application data area of a predetermined format are stored in the data area is generated and sent to the digital communication line. Describing information indicating the transmission source of the information, and storing the second information in the application data area,
The wiring device according to claim 4. The communication control unit
Controlling communication using the two-wire cable so that the reception of the second packet is performed in a time-sharing manner between the plurality of two-wire cables;
The wiring device according to claim 4. The communication control unit
A plurality of two-wire communication control units that are provided for each of the two-wire cables and that transmit the first information and receive the second packet;
A digital communication control unit for receiving the first packet and transmitting the second information;
A communication management unit that controls transfer of the first information and the second information between the plurality of two-wire communication control units and the digital communication control unit;
The wiring device according to claim 4. The two-wire communication network connection unit is
Each of the two-wire cables has a transmission driver and a reception driver,
The communication control unit
Controlling the operation of the transmission driver and the operation of the reception driver;
The wiring device according to claim 4. The two-wire communication network connection unit is
Whether the received signal sent via the two-wire cable includes a sync pattern for a normal connection check that is a sync pattern extracted from the received signal when the two-wire cable is in a positive connection And / or whether or not the received signal includes a reverse connection check sync pattern that is a sync pattern extracted from the received signal when the two-wire cable is reverse connected, In accordance with the result of the determination, inversion processing for the received signal sent via the two-wire cable after the determination and / or transmission sent to the two-wire cable after the determination Performing inversion processing on the signal,
The wiring device according to claim 3. A communication control method in a wiring device connected to a door phone system including a plurality of door phone devices via one or a plurality of two-wire cables,
Connecting to a packet communication network via a digital communication line;
The first packet sent from the packet communication network is analyzed to determine the door phone device to which the first information stored in the first packet is to be transmitted, and to the determined door phone device Transmitting the first information.
Communication control method.

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