WO2012057136A1 - 通信システムおよび重畳装置 - Google Patents
通信システムおよび重畳装置 Download PDFInfo
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- WO2012057136A1 WO2012057136A1 PCT/JP2011/074548 JP2011074548W WO2012057136A1 WO 2012057136 A1 WO2012057136 A1 WO 2012057136A1 JP 2011074548 W JP2011074548 W JP 2011074548W WO 2012057136 A1 WO2012057136 A1 WO 2012057136A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/544—Setting up communications; Call and signalling arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/50—Queue scheduling
- H04L47/60—Queue scheduling implementing hierarchical scheduling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/14—Multichannel or multilink protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
Definitions
- the present invention relates to a communication system and a superimposing apparatus, and in particular, shares a transmission path with a communication of a first protocol using a repetitively transmitted transmission signal, and superimposes a superimposed signal to be superimposed in a predetermined superimposable period of the transmission signal.
- the present invention relates to a communication system and a superimposing apparatus in which terminal devices exchange terminal information using communication of a second protocol to be transmitted.
- a communication system in which a transmission unit (base unit) and a plurality of communication devices (slave units) are connected to a transmission path and performs communication between each communication device and the transmission unit has been widely used.
- the transmission unit periodically monitors the state of the communication device, and when there is a change in the state of the communication device, the transmission unit performs other processing to perform processing corresponding to the state change.
- There are systems that send signals to communication devices see, for example, Japanese Patent Publication No. 1180690, Japanese Patent Publication No. 1195362, and Japanese Patent Publication No. 1144477).
- the communication devices always communicate with each other via the transmission unit, and the transmission unit polls the communication device, so the communication speed is low, for example, an analog amount is relatively low. It is not suitable for transmitting large amounts of information. Further, the above communication system has a problem that the reliability of the system is low because the entire system is stopped when a transmission unit fails.
- the first communication device performs communication of the first protocol using a transmission signal (first protocol signal) repeatedly sent from the transmission unit to the transmission path, and the second communication device transmits a superimposed signal (first signal superimposed on the transmission signal). 2nd protocol communication using 2 protocol signals). The superimposition signal is superimposed on a predetermined superimposable period of the transmission signal.
- This communication system includes a higher-level terminal device 5 connected to a transmission line 2 to which a transmission unit 1 is connected via a higher-level superimposing device 3 and lower-level superimposing devices 41, 42, and 43 that are second communication devices.
- the higher-level terminal device 5 is connected to the transmission path 2 by a different route from the higher-level superimposing device 3.
- the lower superimposing devices 41, 42, and 43 are not distinguished from each other, these are collectively referred to as the lower superimposing device 4, and when the lower terminal devices 61, 62, and 63 are not distinguished from each other, they are collectively referred to as the lower terminal device 6.
- terminal information is exchanged between the upper terminal device 5 and the lower terminal device 6 by communication of the second protocol performed between the upper superimposing device 3 and the lower superimposing device 4.
- the terminal information here is, for example, the power consumption of the electrical equipment measured by the lower order terminal equipment 6. That is, when transmitting terminal information from the lower terminal device 6 to the upper terminal device 5, the lower superimposing device 4 converts the terminal information output from the lower terminal device 6 into a superimposed signal and sends it to the transmission line 2, and the upper superimposing device 3 Converts the superimposed signal received from the transmission path 2 into terminal information and outputs it to the higher-level terminal device 5.
- the number of the lower-level terminal devices 6 can be greatly increased by adding the lower-level superimposing device 4.
- the communication between the upper superimposing apparatus 3 and the lower superimposing apparatus 4 is serial communication using a superimposed signal, so that the upper terminal device 5 collects terminal information from a plurality of lower terminal devices 6.
- the upper terminal device 5 collects terminal information from a plurality of lower terminal devices 6.
- the upper terminal device 5 obtains terminal information one by one from a plurality of lower terminal devices 6, but the communication between the upper superimposing apparatus 3 and the lower superimposing apparatus 4 is limited to a predetermined superimposable period of the transmission signal. Therefore, the time required for acquiring terminal information is relatively long. Therefore, the timing at which the upper terminal device 5 acquires the terminal information varies greatly between the plurality of lower terminal devices 61, 62, 63. Therefore, even when the upper terminal device 5 tries to acquire terminal information at a certain time, the terminal information acquired from one lower terminal device 61 and the terminal information acquired from the other lower terminal device 63 are between May cause a relatively large time lag.
- the present invention has been made in view of the above reasons, and provides a communication system and a superimposing apparatus that can suppress a time lag that occurs in terminal information among a plurality of terminal devices due to variations in timing at which terminal information is acquired. With the goal.
- a first form of a communication system includes a plurality of first terminal devices each connected to a transmission line and having predetermined end uninformation, and the end uninformation connected to the first terminal device connected to the transmission line.
- a second terminal device for sending an information request for requesting, a first superimposing device interposed between the first terminal device and the transmission path, and interposed between the second terminal device and the transmission path.
- a second superimposing device that receives the information request from the second terminal device.
- the first superimposing device includes a terminal connecting unit used for connection with the first terminal device, and a communication unit communicating with the second superimposing device in an available period that is connected to the transmission path and can use the transmission path.
- An information acquisition unit that acquires the terminal information from the first terminal device connected to the terminal connection unit at a predetermined timing; and a buffer unit that stores the terminal information acquired by the information acquisition unit.
- the second superimposing device is configured to transmit the information request to the first superimposing device in the available period when receiving the information request from the second terminal device.
- the information acquisition unit receives the information request from the second superimposing device through the communication unit
- the information acquiring unit acquires the endless information from the buffer unit and transmits the information to the second superimposing device through the communication unit. Is done.
- the second superimposing device is configured to give the end non-information to the second terminal device when receiving the end non-information.
- the predetermined timing is determined by a trigger received by the communication unit through the transmission path.
- the trigger is the information request.
- a fourth mode of a communication system includes the plurality of first superimposing devices in the third mode.
- the information request includes destination information indicating the first terminal device from which the second terminal device requests the non-terminal information.
- the information acquisition unit is configured to perform a destination determination process, an acquisition determination process, a first response process, a second response process, and a third response process.
- the information acquisition unit is configured to perform the destination determination process when receiving the information request from the second superimposing device through the communication unit. In the destination determination process, the information acquisition unit determines whether or not the first terminal device connected to the terminal connection unit matches the first terminal device indicated by the destination information of the received information request. Configured to do.
- the information acquisition unit performs the acquisition determination process when the destination determination process determines that the first terminal device connected to the terminal connection unit matches the first terminal device indicated by the destination information, and the terminal connection When the destination determination process determines that the first terminal device connected to the unit does not match the first terminal device indicated by the destination information, the first response process is performed.
- the information acquisition unit is configured to acquire the terminal information from the first terminal device connected to the terminal connection unit in the first response process.
- the information acquisition unit is configured to determine whether or not the end uninformation of the first terminal device indicated by the destination information is stored in the buffer unit in the acquisition determination process.
- the information acquisition unit performs the second response process when the acquisition determination process determines that the end uninformation of the first terminal device indicated by the destination information is stored in the buffer unit, and the destination information is If it is determined that the end uninformation of the first terminal device is not stored in the buffer unit, the third response process is performed in the acquisition determination process.
- the information acquisition unit acquires the end information of the first terminal device indicated by the destination information from the buffer unit and transmits the information to the second superimposing device through the communication unit. Composed.
- the information acquisition unit is configured to acquire the terminal information from the first terminal device connected to the terminal connection unit and transmit the terminal information to the second superimposing device through the communication unit.
- the second terminal device in the fourth mode, is configured to perform a collection process for sequentially sending the information request to the first terminal device.
- the information request transmitted in the collection process is configured to include common identification information.
- the information acquisition unit is configured to perform an acquired determination process for determining whether the information request including the same identification information as the identification information of the received information request has already been received.
- the information acquisition unit does not perform the first response process and determines that the information request including the identification information that is the same as the identification information of the received information request has already been received, and does not perform the first response process. If it is determined in the acquired determination process that the information request including the same identification information as the identification information of the information request has not been received, the first response process is performed.
- a plurality of the first terminal devices are connected to the terminal connection unit.
- the information acquisition unit is configured to acquire the terminal information from each of the plurality of first terminal devices connected to the terminal connection unit at the predetermined timing.
- the information request includes destination information indicating the first terminal device from which the second terminal device requests the non-terminal information. Composed.
- the information acquisition unit receives the information request from the second superimposing device through the communication unit, the information acquisition unit acquires the end uninformation of each of the plurality of first terminal devices from the buffer unit, and transmits the first information through the communication unit. 2 configured to transmit to the superimposing device.
- the second superimposing device receives the end uninformation from the first superimposing device, the second superimposing device stores the received end uninformation, and the destination information indicated by the destination information included in the information request from the stored end uninformation
- the terminal non-information corresponding to the first terminal device is selected and transmitted to the second terminal device.
- the transmission path has a communication protocol different from a communication protocol between the first superimposing device and the second superimposing device. Used for transmission of transmission signals based on.
- the usable period is a period during which a superimposed signal can be superimposed on the transmission signal.
- the communication unit is configured to communicate with the second superposition device by the superposition signal.
- the second superimposing device is configured to transmit the information request to the first superimposing device using the superimposing signal.
- a superimposing apparatus includes a terminal connection unit to which a terminal device having predetermined end information is connected, a communication unit that is connected to a transmission line and performs communication in an available period in which the transmission line can be used, An information acquisition unit that acquires the terminal information from the terminal device connected to the terminal connection unit at a predetermined timing; and a buffer unit that stores the terminal information acquired by the information acquisition unit.
- the information acquisition unit receives an information request for requesting the terminal non-information from the terminal device through the communication unit, the information acquisition unit acquires the terminal non-information from the buffer unit, and transmits the terminal information through the communication unit to the transmission path. Configured to send to.
- FIG. 1 is a schematic diagram illustrating a communication system according to a first embodiment. It is a block diagram which shows the low-order superimposition apparatus of the communication system of the said Embodiment 1. It is a block diagram which shows the high-order superposition apparatus of the communication system of the said Embodiment 1. It is a wave form diagram which shows the transmission signal which passes along the transmission line which the communication system of the said Embodiment 1 utilizes. It is a flowchart which shows operation
- FIG. 1 It is a block diagram which shows the high-order superimposition apparatus in the communication system of the said Embodiment 2. It is a flowchart which shows operation
- the communication system of this embodiment is a communication system including a transmission unit 1 connected to a two-wire transmission line 2 as shown in FIG.
- This communication system is connected to the transmission line 2 via an upper superimposing device (second superimposing device) 3 and a lower superimposing device (first superimposing device) 41, 42, 43, which are second communication devices.
- the higher-level terminal device 5 is connected to the transmission path 2 by a different route from the higher-level superimposing device 3.
- communication is performed using a transmission signal sent from the transmission unit 1 to the transmission path 2 and a superimposed signal superimposed on the transmission signal.
- the superimposed signal is a signal having a higher frequency than the transmission signal.
- an impedance matching module 7 having a high impedance with respect to the superimposed signal is inserted.
- FIG. 1 shows an example in which three lower superimposing devices 4 are connected to the transmission path 2, this is not intended to limit the number of lower superimposing apparatuses 4 that can be connected to the transmission path 2.
- the communication system includes a plurality of lower-level terminal devices (first terminal devices) 6 each connected to a transmission path 2 and having predetermined end uninformation, and a lower-level connection connected to the transmission path 2.
- An upper terminal device (second terminal device) 5 that sends an information request for requesting end information to the terminal device 6, and a lower superposition device (first superposition device) interposed between the lower terminal device 6 and the transmission path 2 4 and an upper superimposing device (second superimposing device) 3 that is interposed between the upper terminal device 5 and the transmission path 2 and receives an information request from the upper terminal device 5.
- the higher-level terminal device (second terminal device) 5 is configured to perform a collection process of sequentially sending information requests to the lower-level terminal device (first terminal device) 6.
- the information request transmitted in this collection process includes common identification information.
- the information request includes destination information indicating the lower-level terminal device (first terminal device) 6 from which the higher-level terminal device (second terminal device) 5 requests end information.
- the upper superimposing device (second superimposing device) 3 Upon receiving the information request from the upper terminal device (second terminal device) 5, the upper superimposing device (second superimposing device) 3 transmits the information request to the lower superimposing device (first superimposing device) 4 using the superimposed signal. Configured to do.
- the upper superimposing device (second superimposing device) 3 is configured to give the received end uninformation to the upper terminal device (second terminal device) 5 when receiving the end uninformation.
- the low-order superimposing device (first superimposing device) 4 includes an end unconnected unit (first terminal connecting unit) 401, an information acquisition unit 402, a communication unit (first communication unit) 403, A buffer unit 407.
- the first terminal connection unit 401 is used for connection with a lower-level terminal device (first terminal device) 6.
- the lower terminal apparatus 61 is provided in the first terminal connection unit 401 of the lower superimposing apparatus 41
- the lower terminal apparatus 62 is provided in the first terminal connecting unit 401 of the lower superimposing apparatus 42
- the first of the lower superimposing apparatus 43 The lower-level terminal devices 63 are connected to the terminal connection unit 401, respectively.
- the first communication unit 403 is connected to the transmission path 2 and is configured to communicate with the upper superimposing apparatus (second superimposing apparatus) 5 in an available period in which the transmission path 2 can be used.
- the transmission path 2 transmits a transmission signal (see FIG. 4) based on a communication protocol (first protocol) different from the communication protocol (second protocol) between the lower superimposing apparatus 4 and the upper superimposing apparatus 3. Used for transmission.
- the available period is a period during which a superimposed signal can be superimposed on a transmission signal (a period in which the superimposed signal can be superimposed). Therefore, in the present embodiment, the communication unit (first communication unit) 403 of the lower superimposing apparatus 4 is configured to communicate with the upper superimposing apparatus 3 using a superimposition signal.
- the information acquisition unit 402 is configured to acquire terminal information from the lower-level terminal device (first terminal device) 6 connected to the first terminal connection unit 401 at a predetermined timing.
- the information acquisition unit 402 of the lower superimposing device 41 is from the lower terminal device 61
- the information acquiring unit 402 of the lower superimposing device 42 is from the lower terminal device 62
- the information acquiring unit 402 of the lower superimposing device 43 is the lower terminal device.
- the terminal information is acquired from 63.
- the buffer unit 407 is configured to store the terminal information acquired by the information acquisition unit 402.
- the buffer unit 407 of the lower level superimposing device 41 stores the end uninformation of the lower level terminal device 61
- the buffer unit 407 of the lower level superimposing device 42 stores the end uninformation of the lower level terminal device 62
- the buffer unit of the lower level superimposing device 43 Reference numeral 407 stores information on the end information of the lower-level terminal device 63, respectively.
- the information acquisition unit 402 receives an information request from the upper superimposition device 3 through the first communication unit 403, the information acquisition unit 402 acquires end information from the buffer unit 407 and transmits it to the upper superposition device 3 through the first communication unit 403. Configured.
- the transmission path 2 is further connected with a plurality of communication devices (not shown) that communicate with each other using transmission signals repeatedly sent from the transmission unit 1. These communication apparatuses are connected in parallel to the transmission unit 1 via the transmission path 2 and perform communication of the first protocol via the transmission unit 1 by using a transmission signal.
- the transmission unit 1 and the communication device are time-division multiplex transmission systems (hereinafter referred to as “basic systems”) in which data transmission from the transmission unit 1 to the communication device and data transmission from the communication device to the transmission unit 1 are performed in a time division manner. Build up.
- communication devices are classified into two types: monitoring terminals with switches and sensors (not shown) and control terminals with loads (not shown). As a result, it is possible to control the load attached to the control terminal according to the monitoring input from the switch or sensor attached to the monitoring terminal.
- each communication device stores its own pre-assigned address in a storage unit (not shown).
- the monitoring terminal When the monitoring terminal receives the monitoring input, it transmits control information corresponding to the monitoring input to the transmission unit 1. When receiving the control information, the transmission unit 1 transmits the control information to the control terminal associated with the monitoring terminal by the address. Upon receiving the control information, the control terminal controls the load according to the control information. Since the control information reflects the monitoring input of the switch or the like, the monitoring input of the switch or the like is eventually reflected in the load control.
- the transmission unit 1 transmits a time-division transmission signal composed of voltage waveforms in a format divided into a plurality of periods in the time axis direction as shown in FIG. That is, the transmission signal is a bipolar signal ( ⁇ ) comprising a preliminary interruption period 11, a preliminary period 12, a transmission period 13, a return period 14, an interruption period 15, a short circuit detection period 16, and a pause period 17. 24V) time division multiplexed signal.
- the preliminary interruption period 11 is a period for detecting the secondary interruption
- the preliminary period 12 is a period set in accordance with the interruption period 15 and the short-circuit detection period 16
- the transmission period 13 transmits data to the communication device. It is a period to do.
- the return period 14 is a time slot for receiving a return signal from the communication device
- the interrupt period 15 is a period for detecting an interrupt signal described later
- the short circuit detection period 16 is a period for detecting a short circuit. is there.
- the pause period 17 is a period for when processing is not in time.
- the transmission signal is a signal for transmitting data by modulating a carrier composed of a pulse train.
- each communication device when the address data included in the transmission period 13 of the transmission signal received via the transmission path 2 matches the address stored in each storage unit, control information for controlling the load from the transmission signal Capture. Further, the communication device returns the control information as a current mode signal (a signal transmitted by short-circuiting the transmission line 2 through an appropriate low impedance) in synchronization with the transmission signal return period 14. Note that power for the internal circuit of the communication device is supplied by rectifying and stabilizing a transmission signal transmitted via the transmission path 2.
- the transmission unit 1 always performs polling for sequentially accessing the communication device by cyclically changing the address data included in the transmission signal. At the time of constant polling, a communication device whose address data included in the transmission signal matches its own address operates if it contains control information in the transmission signal, and transmits its own operating status. Return to unit 1.
- the transmission unit 1 when the transmission unit 1 receives an interrupt signal generated in response to a monitoring input of a switch or the like in any monitoring terminal (communication device), the transmission unit 1 searches for the communication device that generated the interrupt signal, and communicates the communication device. Access the device and perform interrupt polling.
- the transmission unit 1 always transmits a transmission signal in which the mode data is set to the normal mode, and detects the interrupt signal generated in the monitoring terminal (communication device) in synchronization with the interrupt period 15 of the transmission signal. A transmission signal in which the mode data is set to the interrupt polling mode is transmitted.
- the communication device that generated the interrupt signal synchronizes with the return period 14 of its transmission signal if the upper bit of the address data of the transmission signal in the interrupt polling mode matches the upper bit of its own address.
- the lower bits of the address are returned as return data.
- the transmission unit 1 can acquire the address of the communication device that generated the interrupt signal.
- the transmission unit 1 When the address of the communication device that generated the interrupt signal is acquired by the transmission unit 1, the transmission unit 1 sends a transmission signal requesting the communication device to return control information, and the communication device monitors switches and the like. Control information corresponding to the input is returned to the transmission unit 1. When the transmission unit 1 receives the control information, the transmission unit 1 gives an instruction to clear the monitoring input of the corresponding communication device, and the communication device returns clear of the monitoring input.
- the transmission unit 1 that has received the control information generates control information to be transmitted to the communication device (control terminal) that is associated with the communication device (monitoring terminal) that is the transmission source of the control information by the correspondence relationship between the addresses. .
- the transmission unit 1 sends a transmission signal including this control information to the transmission line 2 to control a load attached to the communication device (control terminal).
- communication devices communicate with each other via the transmission unit 1 in accordance with a polling / selecting protocol (first protocol).
- the upper terminal device 5 also serves as a communication device of the basic system.
- the upper superimposing device 3 When performing communication of the first protocol with the transmission unit 1 as a communication device, the upper superimposing device 3 is used. It communicates with the transmission unit 1 via the transmission line 2 without passing through.
- An impedance matching module 7 having a high impedance with respect to the superimposed signal may be inserted between each communication device of the basic system and the transmission path 2.
- the upper terminal device 5 and the lower terminal device 6 share the basic system and the transmission path 2 and use a superimposed signal superimposed on the transmission signal of the first protocol.
- the second protocol is communicated to exchange terminal information.
- the terminal information here is, for example, the power consumption of the electrical equipment measured by the lower order terminal equipment 6.
- the lower superimposing device 4 converts terminal information output from the lower terminal device 6 into a superimposed signal and sends it to the transmission line 2, and the upper superimposing device 3 uses the superimposed signal received from the transmission line 2 as terminal information.
- the data is converted and output to the upper terminal device 5.
- the upper terminal device 5 can collect terminal information from the lower terminal device 6.
- communication between the higher-level terminal device 5 and the higher-level superimposing device 3 and between the lower-level terminal device 6 and the lower-level superimposing device 4 is realized by serial communication such as RS485.
- the upper terminal device 5 functions as a master and the lower terminal device 6 functions as a slave with respect to communication of the second protocol.
- the upper terminal device 5 as the master polls the lower terminal device 6 as the slave, and acquires terminal information from the lower terminal device 6 as a response to this polling.
- the upper terminal device 5 as a master since a plurality of lower terminal devices 6 are provided, the upper terminal device 5 as a master sequentially polls the plurality of lower terminal devices 61, 62, and 63 as slaves.
- the upper terminal device 5 and the lower terminal device 6 exchange the terminal information
- the upper superimposing device 3 and the lower superimposing device 4 transmit and receive the superimposed signal of the second protocol to and from the transmission path 2.
- the upper superimposing apparatus 3 and the lower superimposing apparatus 4 mutually convert transmission data (terminal information) and a superimposed signal between the upper terminal apparatus 5 or the lower terminal apparatus 6 and the transmission path 2 connected to each other. Functions as an adapter.
- the upper terminal device 5 transmits the terminal information from the lower terminal device 6 by peer-to-peer (P2P) without passing through the transmission unit 1 according to a protocol (second protocol) different from the first protocol described above. It can be acquired.
- P2P peer-to-peer
- communication between communication devices according to the first protocol is performed via the transmission unit 1
- communication between the upper terminal device 5 and the lower terminal device 6 according to the second protocol is not performed via the transmission unit 1. It takes place directly between devices. Therefore, the communication of the second protocol can increase the communication speed as compared with the communication of the first protocol, and is used for transmission of information having a relatively large amount of data such as an analog amount (power consumption or the like).
- the lower level superimposing apparatus 4 includes a terminal connection unit 401 connected to the lower level terminal device 6, an information acquisition unit 402 connected to the terminal connection unit 401, and a communication connected to the information acquisition unit 402. Part 403.
- the communication unit 403 is connected to the transmission path 2 and includes a signal transmission unit 404 that transmits a superimposed signal and a signal reception unit 405 that receives the superimposed signal.
- the information acquisition unit 402 acquires terminal information from the lower terminal device 6 connected to the terminal connection unit 401 via the terminal connection unit 401.
- the communication unit 403 returns terminal information to the higher-level superimposing device 3 using a superimposed signal in response to an information request transmitted from the higher-level superimposing device 3 using a superimposed signal.
- the information request here is a signal output by the higher-level terminal device 5 in response to a return of terminal information from the lower-level terminal device 6, and is transmitted by specifying any lower-level terminal device 6 as a transmission destination.
- the subordinate superimposing device 4 includes a signal monitoring unit 406 that monitors a transmission signal transmitted between the transmission unit 1 of the basic system and the communication device. "State").
- the signal transmission unit 404 has a function of determining whether or not the state analyzed by the signal monitoring unit 406 is in a state suitable for superimposition of the superimposed signal, and transmitting a superimposed signal at a timing determined to be suitable for transmission. It has.
- the transmission signal adopts a signal format as shown in FIG.
- the preliminary interruption period 11 the preliminary period 12, and the pause period 17, even if the superimposed signal is superimposed, there is no influence on the communication by the transmission signal, and the inter-terminal communication by the superimposed signal is not easily influenced by the transmission signal.
- the time during which the transmission signal is stable at high level or low level is relatively short, and the superimposed signal is superimposed. It is easy to affect the communication by the transmission signal.
- the superimposition signal is superimposed in the other period, inter-terminal communication using the superimposition signal is easily affected by a signal (interrupt signal or return data) exchanged between the transmission unit 1 and the communication device. Therefore, the other period is a period that is not used for superimposing the superimposed signal (hereinafter referred to as “non-superimposed period”).
- the rising and falling periods of the transmission signal are not suitable for superimposing the superimposed signal due to the influence of harmonic noise or the transient response accompanying the signal voltage inversion. Therefore, the transmission signal is in a non-overlapping period for a predetermined time (for example, 300 ⁇ s) after the switching (rising or falling) of the period among the preliminary interruption period 11, the preliminary period 12, and the pause period 17.
- a predetermined time for example, 300 ⁇ s
- the transmission line 2 has a superimposable period (usable period) and a non-superimposable period (unusable period).
- the superimposable period is a part of the period during which the transmission signal is transmitted.
- the signal sending unit 404 is configured to determine whether it is a superimposable period or a non-superimposable period based on the analysis result of the state of the transmission signal, and send a superposed signal only when it is determined as a superimposable period. ing.
- the subordinate superimposing device 4 thus synchronizes with the transmission signal and superimposes the superimposed signal only during the period in which the transmission signal can be superimposed, so that the first protocol communication and the second protocol communication using the common transmission path 2 are performed. To avoid interference.
- the signal transmission unit 404 temporarily suspends communication at the end of the superimposable period and performs the next superimposition. Send the remaining data in the possible period.
- the upper superposition apparatus 3 includes a terminal connection unit (second terminal connection unit) 301 connected to the upper terminal device 5 and a communication unit (second communication unit) 303 connected to the transmission path 2. And a signal monitoring unit 306.
- the communication unit 303 is connected to the transmission path 2 and includes a signal transmission unit 304 that transmits a superimposed signal and a signal reception unit 305 that receives the superimposed signal.
- the upper superposition apparatus 3 is inserted between the terminal connection unit (second terminal connection unit) 301 and the communication unit (second communication unit) 303, and between the upper terminal device 5 and the lower terminal device 6.
- a processing unit 302 that processes the exchanged information is provided.
- the upper superposition apparatus 3 includes the second terminal connection unit 301, the second communication unit 303, and the processing unit 302.
- the second terminal connection unit 301 is used for connection with the host terminal device (second terminal device) 5.
- the second communication unit 303 is connected to the transmission line 2 and configured to communicate with the lower superimposing device (first superimposing device) 4 in the available period (superimposable period).
- the communication unit (second communication unit) 303 of the upper superimposing apparatus 3 is configured to transmit an information request to the lower superimposing apparatus 3 using the superimposition signal.
- the processing unit 302 When the processing unit 302 receives an information request from the higher-level terminal device (second terminal device) 5 connected to the second terminal connection unit 301, the processing unit 302 transmits the received information request to the first superimposing device 4 through the second communication unit 303. Configured to do. In the present embodiment, the information request is transmitted to all the first superimposing devices 4 connected to the transmission path 2. That is, the second superimposing device broadcasts an information request. In addition, when the processing unit 302 receives the non-terminal information from the first superimposing device 4 through the second communication unit 303, the processing unit 302 transmits the received non-terminal information to the upper terminal device (second terminal device) connected to the second terminal connection unit 301. ).
- the upper superposition apparatus 3 when the upper superposition apparatus 3 receives the information request from the upper terminal device 5, the upper superposition apparatus 3 transmits the received information request to the lower superposition apparatus 4 in the usable period. That is, the upper superposition apparatus 3 transmits an information request to the lower superposition apparatus 4 using the superposition signal. In addition, when receiving the non-end information from the low-order superimposition device 4, the upper superposition device 3 transmits the received end non-information to the upper terminal device 5.
- the power supply to the upper terminal device 5 and the lower terminal device 6 is supplied by rectifying and stabilizing the transmission signal transmitted from the transmission unit 1 via the transmission path 2 in the same manner as the communication device of the basic system. (Concentrated power supply method).
- the power supply to the upper terminal device 5 and the lower terminal device 6 is not limited to this configuration, and may be performed by a method (local power supply method) that is supplied by rectifying and stabilizing commercial power.
- the lower superimposing device 4 further includes a buffer unit 407 that stores terminal information acquired by the information acquisition unit 402.
- the lower superimposition apparatus 4 can acquire the terminal information of the lower terminal devices 6 connected to each in advance by the information acquisition unit 402 and store the information in the buffer unit 407.
- the information acquisition unit 402 acquires terminal information at a designated timing, and temporarily stores the acquired terminal information in the buffer unit 407 until there is an information request for the lower-level terminal device 6 connected to the terminal connection unit 401. accumulate.
- the terminal information stored in the buffer unit 407 is returned from the communication unit 403 to the upper terminal device 5 if there is an information request for the lower terminal device 6 connected to the terminal connection unit 401.
- the terminal information stored in the buffer unit 407 is deleted from the buffer unit 407 when it is returned from the communication unit 403.
- the information acquisition unit 402 acquires terminal information from the lower-level terminal device 6 at a timing specified by a trigger from another device connected to the transmission path 2 (the predetermined timing is the first through the transmission path 2. It is determined by the trigger received by the communication unit 403). That is, the information acquisition unit 402 starts acquiring terminal information from the lower-level terminal device 6 at the timing when the communication unit 403 receives a trigger sent from another device onto the transmission path 2.
- the trigger is an information request that the upper terminal device 5 requests and returns a terminal information response to the lower terminal device 6 (the trigger is an information request).
- the upper terminal device 5 sequentially transmits information requests to the lower terminal devices 61, 62, and 63 in order to acquire terminal information from the plurality of lower terminal devices 6 by polling.
- the information acquisition unit 402 operates as a trigger. In short, the information acquisition unit 402 outputs an information request to the lower-level terminal device 6 connected to the terminal connection unit 401, and acquires terminal information from the lower-level terminal device 6 as a reply.
- the lower superimposing apparatus 4 receives not only the information request for the lower terminal apparatus 6 connected to itself but also the information request for the lower terminal apparatus 6 connected to another lower superimposing apparatus 4.
- the terminal information is acquired by the information acquisition unit 402 using an information request as a trigger.
- the lower superimposing apparatus 4 receives all information requests from the upper superimposing apparatus 3 at the communication unit 403 regardless of the transmission destination.
- the information acquisition unit 402 includes the information request so that the information request addressed to the lower-level terminal device 6 connected to the other lower-level superposition device 4 becomes the information request addressed to the lower-level terminal device 6 connected to itself.
- the identifier (address) of the lower terminal device 6 as the transmission destination is changed.
- the information acquisition unit 402 outputs an information request whose transmission destination has been changed to the lower terminal device 6 connected to itself, and acquires terminal information as a reply.
- the lower superimposing device 4 receives an information request addressed to the lower terminal device 6 connected to the other lower superimposing device 4, the lower superimposing device 4 immediately returns the terminal information from the communication unit 403 to the upper terminal device 5. There is no. Therefore, when receiving an information request addressed to the lower-level terminal device 6 connected to another lower-level superposition device 4, the information acquisition unit 402 temporarily stores the terminal information in the buffer unit 407, and then connected to itself. The terminal information is returned only after receiving the information request addressed to the lower-level terminal device 6.
- Each of the lower superimposing devices 4 sends a series of information requests that are sequentially transmitted to the plurality of lower terminal devices 61, 62, and 63 in response to the return of the terminal information acquired by the upper terminal device 5 at the same timing. Will receive. For example, when the upper terminal device 5 requests terminal information every hour such as 1:00, 2:00, and 3:00, there are a plurality of upper terminal devices 5 at 1:00. The information request is sequentially transmitted to the lower terminal devices 61, 62, and 63.
- each lower superimposing device 4 also receives an information request addressed to the lower terminal device 6 connected to each other lower superimposing device 4, so that an information request for requesting terminal information for 1:00 is made a plurality of times ( Here, it will be received three times).
- the information request includes timing information (for example, time information) indicating the timing for acquiring the terminal information, and a series of these information requests for requesting a return of the terminal information acquired at the same timing as described above.
- the information acquisition unit 402 is configured to acquire terminal information from the lower-level terminal device 6 only once for a series of information requests for requesting a return of terminal information acquired at the same timing. Yes. That is, for example, when the information request including the timing information for 1:00 is transmitted in the order of the lower-level terminal devices 61, 62, and 63, the information acquisition unit 402 of each lower-level superimposing device 4 receives the lower-level terminal devices that each receive first. Terminal information is acquired by using only an information request addressed to 61 as a trigger.
- the information acquisition unit 402 is configured to perform destination determination processing, acquisition determination processing, first response processing, second response processing, and third response processing.
- the information acquisition unit 402 is configured to perform destination determination processing when an information request is received from the higher-level superposition device 3 through the first communication unit 403.
- the information acquisition unit 402 is connected to the lower terminal device (first terminal device) 6 indicated by the destination information of the received information request and is connected to the first terminal connection unit 401 (first terminal device). 6 is configured to determine whether or not they match.
- the information acquisition unit 402 determines in the destination determination process that the lower terminal device (first terminal device) 6 connected to the first terminal connection unit 401 matches the lower terminal device (first terminal device) 6 indicated by the destination information.
- the acquisition determination process is performed and it is determined in the destination determination process that the lower terminal device (first terminal device) connected to the first terminal connection unit 401 does not match the lower terminal device (first terminal device) 6 indicated by the destination information. It is comprised so that a 1st response process may be performed.
- the information acquisition unit 402 is configured to determine whether or not end information of the lower-level terminal device (first terminal device) 6 indicated by the destination information is stored in the buffer unit 407 in the acquisition determination process. When the acquisition determination process determines that the end information of the lower-level terminal device (first terminal device) 6 indicated by the destination information is stored in the buffer unit 407, the information acquisition unit 402 performs a second response process. If it is determined in the acquisition determination processing that the end uninformation of the lower terminal device (first terminal device) 6 shown is not stored in the buffer unit 407, the third response processing is performed.
- the information acquisition unit 402 is configured to acquire terminal information from the lower-level terminal device (first terminal device) 6 connected to the first terminal connection unit 401 in the first response process.
- the information acquisition unit 402 acquires from the buffer unit 407 the end information of the lower-level terminal device (first terminal device) 6 indicated by the destination information, and transmits the higher-level superimposing device (second It is configured to transmit to the superimposing device 3.
- the information acquisition unit 402 acquires terminal information from the lower terminal device (first terminal device) 6 connected to the first terminal connection unit 401, and receives the upper superimposing device (first 2 superimposing device) 3.
- the information acquisition unit 402 is configured to perform an acquired determination process.
- the information acquisition unit 402 determines that the destination terminal device (first terminal device) connected to the first terminal connection unit 401 does not match the lower terminal device (first terminal device) 6 indicated by the destination information. If it determines with a determination process, it will be comprised so that the acquired determination process may be performed.
- the information acquisition unit 402 is configured to determine whether or not an information request including the same identification information as the identification information (timing information in the present embodiment) of the received information request has already been received in the acquired determination process. When the acquisition determination process determines that the information request including the same identification information as the identification information of the received information request has already been received, the information acquisition unit 402 does not perform the first response process, and is the same as the identification information of the received information request. If it is determined in the acquired determination process that an information request including identification information has not yet been received, the first response process is performed.
- the acquired determination process may be performed before the destination determination process. In this case, if the information acquisition unit 402 determines that the information request including the same identification information as the identification information of the received information request has already been received in the acquired determination process, the information acquisition unit 402 does not perform the destination determination process, and does not perform the destination determination process. If the acquired determination process determines that an information request including the same identification information has not been received yet, the destination determination process is performed.
- the lower superimposing device 4 determines whether or not the information request transmission target is the lower terminal device 6 connected to itself (destination determination process [ S2]). If it is an information request addressed to the lower-level terminal device 6 connected to itself (S2: Yes), the information acquisition unit 402 determines whether or not the acquired terminal information (data) is already held in the buffer unit 407. Judgment (acquisition judgment process [S3]).
- the information acquisition unit 402 acquires terminal information (data) from the connected lower terminal device 6 (S4), and this terminal Information (acquired data) is returned from the communication unit 403 to the upper terminal device 5 as a response to the information request (S5). That is, the information acquisition unit 402 performs a third response process.
- the lower-level superimposing device 4 has already acquired the terminal information at the same timing from the lower-level terminal device 6. (Acquired determination process [S6]), and if acquired (S6: Yes), the process ends. If the terminal information (data) has not been acquired (S6: No), the information acquisition unit 402 changes the transmission destination of the information request to the lower terminal device 6 connected to itself (S7), and the lower terminal device The terminal information is acquired from 6 (S8), and this terminal information (acquired data) is stored in the buffer unit 407 (S9). That is, the information acquisition unit 402 performs a first response process.
- the subordinate superimposing apparatus 4 that has accumulated the terminal information (data) in the buffer unit 407 next receives an information request addressed to the subordinate terminal device 6 connected to itself (S2: Yes).
- the terminal information (retained data) is returned from the communication unit 403 to the upper terminal device 5 as a response to the information request (S10). That is, the information acquisition unit 402 performs the second response process.
- the upper terminal device 5 uses an information request (hereinafter referred to as “first information request”) in which the destination information indicates the lower terminal device 61 and an information request (hereinafter referred to as “first information request”) in which the destination information indicates the lower terminal device 62.
- first information request an information request whose destination information indicates the lower-level terminal device 63 (hereinafter referred to as a “third information request”) is transmitted in this order at predetermined time intervals.
- the upper superimposing device 3 Upon receiving the first information request, the upper superimposing device 3 transmits the first information request to the lower superimposing devices 41, 42, and 43 using a superimposition signal.
- the lower superimposing devices 41, 42, and 43 receives the first information request (S1), it performs destination determination processing (S2).
- the destination information of the first information request indicates the lower terminal device 61. Therefore, the lower superimposing apparatus 41 performs an acquisition determination process (S3), and the lower superimposing apparatuses 42 and 43 perform an acquired determination process (S6). If the buffer unit 407 of the lower level superimposing device 41 does not store the terminal information of the lower level terminal device 61, the lower level superimposing device 41 performs the third response process (S4, S5).
- the terminal information of the lower terminal device 61 is transmitted to the upper superposition apparatus 3 by the superposition signal.
- the upper superposition apparatus 3 Upon receiving the terminal information of the lower terminal device 61, the upper superposition apparatus 3 transmits the received terminal information of the lower terminal device 61 to the upper terminal device 5.
- the lower superimposing devices 42 and 43 since the first information request is the first information request in the collection process, the lower superimposing devices 42 and 43 perform the first response processing (S7, S8, S9).
- the buffer unit 407 of the lower level superimposing device 42 stores the terminal information of the lower level terminal device 62
- the buffer unit 407 of the lower level superimposing device 43 stores the terminal information of the lower level terminal device 63.
- the upper superimposing device 3 Upon receiving the second information request, the upper superimposing device 3 transmits the second information request to the lower superimposing devices 41, 42, and 43 using a superimposition signal.
- the lower superimposing devices 41, 42, and 43 receives the second information request (S1), it performs destination determination processing (S2).
- the destination information of the second information request indicates the lower terminal device 62. Therefore, the lower superimposing device 42 performs an acquisition determination process (S3), and the lower superimposing devices 41 and 43 perform an acquired determination process (S6). Since the buffer unit 407 of the lower superimposing apparatus 42 has already stored the terminal information of the lower terminal device 62, the lower superimposing apparatus 42 performs the second response process (S10).
- the terminal information of the lower-level terminal device 62 is transmitted to the higher-level superimposing device 3 by the superimposed signal.
- the upper superposition apparatus 3 Upon receiving the terminal information of the lower terminal device 62, the upper superposition apparatus 3 transmits the received terminal information of the lower terminal device 62 to the upper terminal device 5.
- the second information request is the second information request in the collection process, each of the lower superimposing devices 41 and 43 ends the process without performing the first response process.
- the upper superimposing device 3 Upon receiving the third information request, the upper superimposing device 3 transmits the third information request to the lower superimposing devices 41, 42, and 43 using a superimposition signal.
- the lower superimposing devices 41, 42, 43 receives the third information request (S1), it performs destination determination processing (S2).
- the destination information of the third information request indicates the lower terminal device 63. Therefore, the lower superimposing device 43 performs an acquisition determination process (S3), and the lower superimposing devices 41 and 42 perform an acquired determination process (S6). Since the buffer unit 407 of the lower superimposing device 43 has already stored the terminal information of the lower terminal device 63, the lower superimposing device 43 performs a second response process (S10).
- the terminal information of the lower terminal device 63 is transmitted to the upper superposition apparatus 3 by the superposition signal.
- the upper superposition apparatus 3 Upon receiving the terminal information of the lower terminal device 63, the upper superposition apparatus 3 transmits the received terminal information of the lower terminal device 63 to the upper terminal device 5.
- the third information request is the third information request in the collection process, and thus the lower superimposing devices 41 and 42 end the processing without performing the first response processing, respectively.
- the second terminal device 5 acquires the terminal information of each of the first terminal devices 61, 62, 63 by performing the collection process.
- the communication system includes a plurality of terminal devices 5 and 6, shares the transmission path 2 with the first protocol communication using the transmission signal that is repeatedly transmitted, and transmits the transmission signal.
- An upper superposition device 3 that is inserted between the terminal device (upper terminal device) 5 and the transmission path 2 and converts the superposition signal received from the transmission path 2 into terminal information and outputs the terminal information to the terminal equipment 5;
- the device 4 is connected to a terminal device 6 A terminal connection unit 401; an information acquisition unit 402 that acquires terminal information from the terminal device 6 connected to the terminal connection unit 401; a buffer unit 407 that stores terminal information acquired by the information acquisition unit 402; 3, a communication unit 403 that returns terminal information as a superimposed signal in response to an information request from 3, and an information acquisition unit 402 acquires terminal information at a specified timing and is connected to the terminal connection unit 401.
- the acquired terminal information is temporarily stored in the buffer unit 407 until there is an information request for the device 6.
- the communication system of the present embodiment includes a plurality of first terminal devices (lower terminal devices) 6 each having a predetermined end uninformation connected to the transmission path 2 and the first terminal equipment connected to the transmission path 2.
- a second superimposing device (upper superimposing device) 5 that is interposed between the second terminal device 5 and the transmission line 2 and receives an information request from the second terminal device 5,
- the terminal information is sent from the first terminal device 6 connected to the one-terminal connection unit 401 to a predetermined type.
- Information acquisition unit 402 acquired by the storage, and buffer unit 407 for storing the terminal information acquired by the information acquisition unit 402.
- the information acquiring unit 402 is configured to transmit an information request to the first superimposing device 4 during the available period. It is configured to acquire uninformation and transmit it to the second superimposing device 3 through the first communication unit 403, and the second superimposing device 3 gives the end uninformation to the second terminal device 5 when receiving the end uninformation. Configured as follows.
- the transmission path 2 is used for transmission of a transmission signal based on a communication protocol different from the communication protocol between the first superimposing device 4 and the second superimposing device 3.
- the available period is a period during which the superimposed signal can be superimposed on the transmission signal.
- the communication unit (first communication unit) 403 is configured to communicate with the second superimposing device 3 using a superimposition signal.
- the second superimposing device 3 is configured to transmit an information request to the first superimposing device 4 using the superimposing signal.
- the superimposing apparatus 4 in the present embodiment includes a plurality of terminal devices 5 and 6, and shares the transmission path 2 with the communication of the first protocol using the transmission signal that is repeatedly transmitted.
- the acquired terminal information is temporarily stored in the buffer unit 407 until there is an information request for the terminal device 6 connected to 401.
- the superimposing device 4 in the present embodiment is connected to the terminal connection unit (first terminal connection unit) 401 to which the terminal device (first terminal device) 6 having predetermined end-unknown information is connected, and the transmission path 2.
- a communication unit (first communication unit) 403 that performs communication in an available period in which the transmission path 2 can be used, and an information acquisition unit that acquires terminal information from the terminal device 6 connected to the terminal connection unit 401 at a predetermined timing.
- the information acquisition unit 402 When the information acquisition unit 402 receives an information request for requesting terminal information from the terminal device 6 through the communication unit 403, the information acquisition unit 402 acquires terminal information from the buffer unit 407 and transmits the terminal information to the transmission path 2 through the communication unit 403. Configured as follows.
- the lower superimposition apparatus 4 acquires terminal information at a designated timing by the information acquisition unit 402, and an information request to the terminal device 6 connected to the terminal connection unit 401 is made. Until there is, the acquired terminal information is temporarily stored in the buffer unit 407. Therefore, the plurality of lower superimposing devices 4 can simultaneously acquire the terminal information of the lower terminal devices 6 at a designated timing, and store them in the respective buffer units 407 as necessary. That is, since the communication between the upper superimposing apparatus 3 and the lower superimposing apparatus 4 is limited only to a predetermined superimposable period of the transmission signal, the timing at which the terminal information is returned to the upper terminal device 5 is shifted.
- the acquisition unit 402 can acquire terminal information in advance prior to returning the terminal information.
- the information acquisition unit 402 of each lower-level superimposing device 4 can align the timing for acquiring terminal information among the plurality of lower-level terminal devices 61, 62, 63. Therefore, according to the communication system, a time lag generated between terminal information due to variations in timing at which the lower-level superimposing device 4 acquires terminal information from a plurality of lower-level terminal devices 6 can be suppressed. That is, there is an advantage that the time lag generated in the terminal information among a plurality of terminal devices 6 can be suppressed small due to variations in timing at which the terminal information is acquired.
- the information acquisition unit 402 acquires terminal information at a timing specified by a trigger from another device connected to the transmission path 2.
- the timing at which the information acquisition unit 402 acquires terminal information is specified by a trigger from another device connected to the transmission path 2, and therefore, a plurality of lower superimposing apparatuses 4 connected to the transmission path 2.
- the terminal information acquisition timing can be easily aligned between each other.
- the trigger is an information request from the upper superimposing device 3. As described above, since the information request from the higher-level superimposing device 3 is used as a trigger, a separate device for generating the trigger is not required, and the system configuration is simplified.
- a plurality of lower superimposing devices 4 are connected to the transmission path 2, and the information acquisition unit 402 is information on the terminal device 6 connected to the other lower superimposing device 4.
- the information acquisition unit 402 is information on the terminal device 6 connected to the other lower superimposing device 4.
- terminal information is acquired from the terminal device 6 connected to the terminal connection unit 401 and stored in the buffer unit 407, and the communication unit 403 sends an information request to the terminal device 6 connected to the terminal connection unit 401.
- the terminal information stored in the buffer unit 407 is returned.
- the communication system of the present embodiment includes a plurality of first superimposing devices 4 (41, 42, 43).
- the information request includes destination information indicating the first terminal device 6 from which the second terminal device 5 requests endless information.
- the information acquisition unit 402 is configured to perform destination determination processing, acquisition determination processing, first response processing, second response processing, and third response processing.
- the information acquisition unit 402 is configured to perform destination determination processing when an information request is received from the higher-level superposition device 3 through the first communication unit 403.
- the information acquisition unit 402 is connected to the lower terminal device (first terminal device) 6 indicated by the destination information of the received information request and is connected to the first terminal connection unit 401 (first terminal device). 6 is configured to determine whether or not they match.
- the information acquisition unit 402 determines in the destination determination process that the lower terminal device (first terminal device) 6 connected to the first terminal connection unit 401 matches the lower terminal device (first terminal device) 6 indicated by the destination information.
- the acquisition determination process is performed and it is determined in the destination determination process that the lower terminal device (first terminal device) connected to the first terminal connection unit 401 does not match the lower terminal device (first terminal device) 6 indicated by the destination information. It is comprised so that a 1st response process may be performed.
- the information acquisition unit 402 is configured to determine whether or not end information of the lower-level terminal device (first terminal device) 6 indicated by the destination information is stored in the buffer unit 407.
- the information acquisition unit 402 When the acquisition determination process determines that the end information of the lower-level terminal device (first terminal device) 6 indicated by the destination information is stored in the buffer unit 407, the information acquisition unit 402 performs a second response process. If it is determined in the acquisition determination processing that the end uninformation of the lower terminal device (first terminal device) 6 shown is not stored in the buffer unit 407, the third response processing is performed.
- the information acquisition unit 402 is configured to acquire terminal information from the lower-level terminal device (first terminal device) 6 connected to the first terminal connection unit 401 in the first response process.
- the information acquisition unit 402 acquires from the buffer unit 407 the end information of the lower-level terminal device (first terminal device) 6 indicated by the destination information, and transmits the higher-level superimposing device (second It is configured to transmit to the superimposing device 3.
- the information acquisition unit 402 acquires terminal information from the lower terminal device (first terminal device) 6 connected to the first terminal connection unit 401, and receives the upper superimposing device (first 2 superimposing device) 3.
- the lower-level superimposing device 4 when receiving the information request addressed to the lower-level terminal device 6 connected to the other lower-level superimposing device 4, the lower-level superimposing device 4 acquires the terminal information, temporarily stores it in the buffer unit 407, and then stores itself. Terminal information is returned in response to an information request addressed to the lower-level terminal device 6 connected to. Therefore, even when information requests are sequentially transmitted from the upper terminal device 5 serving as a master to a plurality of lower terminal devices 6 serving as slaves, the information acquisition unit 402 of each lower superimposing device 4 acquires the terminal information acquisition timing. Can be aligned.
- the information acquisition unit 402 requests terminal information from the terminal device 6 only once for a series of information requests sequentially transmitted to the plurality of lower superposition apparatuses 4 in response to terminal information acquired at the same timing. To get.
- the second terminal device 5 is configured to perform a collection process for sequentially sending information requests to the first terminal device 6.
- the information request transmitted in the collection process includes common identification information.
- the information acquisition unit 402 is configured to perform an acquired determination process for determining whether an information request including the same identification information as the identification information of the received information request has already been received. When the acquisition determination process determines that the information request including the same identification information as the identification information of the received information request has already been received, the information acquisition unit 402 does not perform the first response process, and is the same as the identification information of the received information request. If it is determined in the acquired determination process that an information request including identification information has not yet been received, the first response process is performed.
- the information acquisition unit 402 acquires terminal information only once for a series of information requests for requesting a return of terminal information acquired at the same timing. For this reason, the information acquisition unit 402 uses a plurality of pieces of terminal information having a time difference from the same lower terminal device 6 as in the case of using each of these series of information requests for requesting a return of terminal information acquired at the same timing as a trigger. None get. That is, there is an advantage that the information acquisition unit 402 can acquire terminal information only at one timing requested by the higher-level terminal device 5 and avoid acquisition of useless terminal information.
- the upper superimposing apparatus 3 is configured to issue a preliminary request separately from the information request to all the lower superimposing apparatuses 4 connected to the transmission line 2, and the timing when the information acquisition unit 402 receives the preliminary request.
- the terminal information may be obtained from the lower terminal device 6.
- the preliminary request here is a signal for requesting only acquisition of terminal information from the lower-level terminal device 6 prior to the information request, and is transmitted by broadcast to all the lower-level superimposing devices 4.
- the information acquisition unit 402 temporarily accumulates terminal information acquired at the timing of receiving a preliminary request as a trigger in the buffer unit 407, and communicates the terminal information in the buffer unit 407 in response to a subsequent information request. It is made to reply from the part 403.
- the information acquisition unit 402 is not limited to a configuration in which terminal information is acquired in response to a trigger from another device connected to the transmission path 2.
- the terminal information may be acquired at a predetermined time. That is, in the modification of the communication system according to the present embodiment, the information acquisition unit 402 performs a scheduled acquisition process for acquiring terminal information from the first terminal device 6 connected to the first terminal connection unit 401 at a predetermined time. Configured as follows. In this case, in order to synchronize the clocks of the plurality of lower superimposing devices 4, for example, the synchronization signal may be periodically transmitted from the upper terminal device 5.
- the lower superposition apparatus 4 operates according to the flowchart of FIG. 6 by issuing an information request from the upper superposition apparatus 3 at the predetermined time.
- the lower superimposing apparatus 4 receives an information request addressed to the lower terminal device 6 connected to itself from the upper terminal device 5 (S11: Yes)
- the acquired terminal information (data) is already stored in the buffer unit 407. It is determined whether or not it is held (S12). If terminal information (data) is not held in the buffer unit 407 (S12: No), the information acquisition unit 402 acquires terminal information (data) from the connected lower-level terminal device 6 (S13). Information (acquired data) is returned from the communication unit 403 to the upper terminal device 5 as a response to the information request (S14).
- the lower level superimposing apparatus 4 when the lower level superimposing apparatus 4 is not receiving an information request addressed to the lower level terminal device 6 connected to itself (S11: No), the lower level terminal device 6 is at the predetermined time (S15: Yes). Terminal information is acquired (S16), and the terminal information is stored in the buffer unit 407 (S17). That is, the low-order superimposing device 4 performs a regular acquisition process.
- the subordinate superimposing apparatus 4 that has accumulated the terminal information in the buffer unit 407 next receives the terminal information in the buffer unit 407 when receiving an information request addressed to the subordinate terminal device 6 connected to itself (S11: Yes). A response to the information request is returned from the communication unit 403 to the upper terminal device 5 (S18).
- the plurality of lower-level superimposing devices 4 simultaneously transmit the terminal information of the lower-level terminal devices 6 at the designated timing (the predetermined time).
- the time lag that occurs between the terminal information can be suppressed to a small value.
- the communication system according to the present embodiment is different from the communication system according to the first embodiment in that a plurality of lower terminal devices 6 are connected to each lower superimposing device 4 as shown in FIG. That is, in the communication system according to the present embodiment, a plurality of first terminal devices 6 are connected to the first terminal connection unit 401. Further, the communication system according to the present embodiment is different from the communication system according to the first embodiment in that the upper superimposing device (second superimposing device) 3A includes a storage unit 307 as illustrated in FIG.
- lower terminal devices 611, 612,... are connected to the lower superimposing device 41, and lower terminal devices 621, 622,. Are connected to lower terminal devices 631, 632,.
- a plurality of lower terminal devices 6 connected to the same lower superimposing device 4 are connected by a feed wiring so as to be connected to the terminal connection unit 401 in parallel.
- the information acquisition unit 402 acquires terminal information from all lower terminal devices 6 connected to the terminal connection unit 401 at a timing when an information request is received from the upper superimposing apparatus 3A as a trigger.
- the acquired terminal information is temporarily stored in the buffer unit 407. That is, the information acquisition unit 402 is configured to acquire terminal information from each of the plurality of first terminal devices 6 connected to the first terminal connection unit 401 at a predetermined timing. At this time, the information acquisition unit 402 acquires terminal information only in response to the first one information request among a series of information requests for requesting a return of terminal information acquired at the same timing. Terminal information is not redundantly acquired from the same lower terminal device 6.
- the lower-level superimposing device 4 does not acquire this terminal information again from the lower-level terminal device 6.
- the communication unit 403 sends a reply to the upper superimposing apparatus 3A.
- the information acquisition unit 402 of each lower-level superimposing device 4 outputs an information request to each of a plurality of lower-level terminal devices 6 connected to the terminal connection unit 401, and acquires terminal information as a reply.
- the communication between the lower superimposing device 4 and the lower terminal device 6 is not limited to a predetermined superimposable period as in the second protocol communication.
- the time difference for acquiring terminal information from the terminal device 6 is negligible. That is, a large time lag does not occur in the terminal information acquired by the information acquisition unit 402 from the plurality of lower terminal devices 6.
- the lower superimposing apparatus 4 when the lower superimposing apparatus 4 receives an information request addressed to the lower terminal device 6 connected to itself from the upper superimposing apparatus 3A and returns terminal information, all of the preliminarily accumulated in the buffer unit 407 are received.
- the terminal information for the lower terminal device 6 is returned from the communication unit 403 to the upper superposition apparatus 3.
- the upper superimposing apparatus 3 ⁇ / b> A has an accumulating unit 307 that accumulates terminal information, and accumulates terminal information for a plurality of lower terminal devices 6 returned collectively from the lower superimposing apparatus 4. The data is temporarily stored in the unit 307. At this time, the upper superposition apparatus 3 ⁇ / b> A returns only the terminal information of the lower terminal device 6 that is the transmission destination of the information request output by the upper terminal device 5 to the upper terminal device 5.
- the second superimposing device 3 ⁇ / b> A includes an accumulation unit 307 that stores the end uninformation received from the first superimposing device 4.
- the processing unit 302 determines whether or not terminal information corresponding to the first terminal device 6 indicated by the destination information included in the received information request is stored in the storage unit 307. Configured to determine.
- the processing unit 302 acquires the terminal information corresponding to the first terminal device 6 indicated by the destination information from the storage unit 307. Then, it is configured to transmit to the second terminal device 5.
- the processing unit 302 is configured to transmit an information request to the first superimposing device 4 through the second communication unit 303 if the terminal information corresponding to the first terminal device 6 indicated by the destination information is not stored in the storage unit 307. Is done.
- the information acquisition unit 402 transmits end information of all the first terminal devices 6 connected to the first terminal connection unit 401 to the upper superposition device 3. Therefore, the processing unit 302 receives only the terminal information corresponding to the first terminal device 6 indicated by the destination information included in the information request received from the higher-level terminal device 5 among the unacknowledged information received through the second communication unit. It is configured to transmit to the device 5.
- the upper superimposing apparatus 3A does not communicate with the lower superimposing apparatus 4 again.
- Information is output from the storage unit 307 to the upper terminal device 5 as a reply to the information request.
- the terminal information stored in the storage unit 307 is deleted from the storage unit 307 when it is returned to the higher-level terminal device 5. Note that it is not always necessary to delete the edge information from the storage unit 307.
- the processing of S21 to S30 in the flowchart of FIG. 9 corresponds to the processing of S1 to S10 in the flowchart of FIG.
- the information acquisition unit 402 changes the transmission destination of the information request to the lower-level terminal device 6 connected to itself
- the information acquisition unit 402 Changes the transmission destination of the information request to the lower terminal device 6 from which the terminal information has not been acquired.
- the terminal information returned from the communication unit 403 is terminal information for a plurality of lower-level terminal devices 6 connected to the terminal connection unit 401.
- terminal information is returned from the communication unit 403 (S25, S30), or the terminal information acquired by the information acquisition unit 402 is stored in the buffer unit 407 (S29). Is determined from all the lower-level terminal devices 6 (S31). At this time, if the terminal information has been acquired from all the lower-level terminal devices 6 (S31: Yes), the lower-level superposition device 4 ends the process.
- the lower superimposing device 4 acquires the terminal information from the unacquired lower terminal devices 6 until all the terminal information has been acquired ( (S32), this terminal information is stored in the buffer unit 407 (S33), and the process is repeated.
- the upper-level superimposing device 3A When the information request (S41) is output from the higher-level terminal device 5 to the lower-level terminal device 631 connected to the lower-level superimposing device 43, the upper-level superimposing device 3A also sends the information to the lower-level superimposing device 41 using the superimposed signal.
- An information request (S42) is transmitted.
- the lower-level superimposing device 41 uses this information request as a trigger to output an information request to the lower-level terminal devices 611, 612,. Acquisition is started (S43 to S46).
- the lower superimposing apparatus 41 does not immediately return the terminal information acquired at this time to the upper superimposing apparatus 3, but temporarily stores it in the buffer unit 407.
- the buffer unit 407 of the lower level superimposing device 41 stores the end information of each of the lower level terminal devices 611, 612,.
- the upper superimposing apparatus 3A transmits an information request (S48) to the lower superimposing apparatus 41 by a superimposition signal.
- the lower superimposing apparatus 41 Upon receiving the information request addressed to the lower terminal device 611, the lower superimposing apparatus 41 returns all the terminal information stored in the buffer unit 407 to the upper superimposing apparatus 3A in response to this information request (S49). In other words, the end information of each of the lower terminal devices 611, 612,... Is transmitted to the upper superimposing apparatus 3A.
- the upper superimposing apparatus 3A that has received the terminal information from the lower superimposing apparatus 41 outputs only the terminal information of the lower terminal apparatus 611 that is the transmission destination of the information request to the upper terminal apparatus 5 (S50). Accumulate in the accumulation unit 307.
- the lower superposition apparatus 41 that has received the information request uses this information request as a trigger to output an information request to the lower terminal devices 611, 612,. Is started (S51, S52).
- two lower terminal devices 611 and 612 are connected to the lower superimposing device 41
- two lower terminal devices 621 and 622 are connected to the lower superimposing device 42
- two lower terminal devices 631 and 632 are connected to the lower superimposing device 43, respectively.
- the storage unit 307 does not store terminal information
- the buffer units 407 of the lower superimposing apparatuses 41, 42, and 43 do not store terminal information.
- the upper terminal device 5 uses an information request (hereinafter referred to as “first information request”) whose destination information indicates the lower terminal device 611 and an information request (hereinafter referred to as “first information request”) whose destination information indicates the lower terminal device 612. , “Second information request”), an information request whose destination information indicates the lower terminal device 621 (hereinafter referred to as “third information request”), and an information request whose destination information indicates the lower terminal device 622 (hereinafter, “ Information request (hereinafter referred to as “fifth information request”) whose destination information indicates the lower terminal device 631, and information request (hereinafter referred to as “sixth information request”) where the destination information indicates the lower terminal device 632. "Information request”) is transmitted in this order at predetermined time intervals.
- the upper superimposing apparatus 3A determines whether the terminal information of the lower terminal device 611 is accumulated in the accumulating unit 307. Since the storage unit 307 does not store any terminal information, the upper superimposing apparatus 3A transmits the first information request to the lower superimposing apparatuses 41, 42, and 43 using a superimposition signal.
- each of the lower superimposing devices 41, 42, and 43 performs destination determination processing (S22).
- the destination information of the first information request indicates the lower terminal device 611. Therefore, the lower superimposing apparatus 41 performs an acquisition determination process (S23), and the lower superimposing apparatuses 42 and 43 perform an acquired determination process (S26).
- the lower level superimposing device 41 Since the buffer unit 407 of the lower level superimposing device 41 does not store the terminal information of the lower level terminal device 611, the lower level superimposing device 41 performs the third response process (S24, S25). As a result, the terminal information of the lower terminal device 611 is transmitted to the upper superimposing apparatus 3 by the superimposing signal. Furthermore, the lower superimposition apparatus 41 acquires terminal information of the lower terminal device 612 (S31, S32, S33). Accordingly, the buffer unit 407 stores the terminal information of each of the two lower terminal devices 611 and 612. Upon receiving the terminal information of the lower terminal device 611, the upper superposition apparatus 3 transmits the received terminal information of the lower terminal device 611 to the upper terminal device 5.
- the first information request is the first information request in the collection process, so that the lower superimposing devices 42 and 43 collect terminal information (S27, S28, S29, S31, S32, S33). Accordingly, the buffer unit 407 of the lower level superimposing device 42 stores the terminal information of each of the lower level terminal devices 621 and 622, and the buffer unit 407 of the lower level superimposing device 43 stores the terminal information of each of the lower level terminal devices 631 and 632.
- the upper superimposing apparatus 3A Upon receiving the second information request, the upper superimposing apparatus 3A determines whether the terminal information of the lower terminal device 612 is accumulated in the accumulating unit 307. Since the storage unit 307 does not store the terminal information of the lower terminal device 612, the upper superimposing apparatus 3A transmits the second information request to the lower superimposing apparatuses 41, 42, and 43 using a superimposition signal.
- the lower superimposing devices 41, 42, 43 receives the second information request (S21), it performs destination determination processing (S22).
- the destination information of the second information request indicates the lower terminal device 612. Therefore, the lower superimposing apparatus 41 performs an acquisition determination process (S23), and the lower superimposing apparatuses 42 and 43 perform an acquired determination process (S26).
- the lower level superimposing device 41 Since the buffer unit 407 of the lower level superimposing device 41 stores the terminal information of the lower level terminal device 612, the lower level superimposing device 41 performs the second response process (S30). Thereby, the terminal information of the lower terminal device 612 is transmitted to the upper superimposing apparatus 3A by the superimposition signal together with the end information of the lower terminal device 611. Upon receiving the terminal information of each of the lower terminal devices 611 and 612, the upper superimposing apparatus 3A transmits only the terminal information of the lower terminal device 612 corresponding to the destination information of the second information request to the upper terminal device 5. Regarding the lower superimposing devices 42 and 43, since the second information request is the second information request in the collection process, the lower superimposing devices 42 and 43 respectively end the processing.
- the upper superimposing apparatus 3A determines whether the terminal information of the lower terminal device 621 is stored in the storage unit 307. Since the storage unit 307 does not store the terminal information of the lower-level terminal device 621, the higher-level superimposing device 3A transmits a third information request to the lower-level superimposing devices 41, 42, and 43 using a superimposed signal.
- the lower superimposing devices 41, 42, 43 receives the third information request (S21), it performs destination determination processing (S22).
- the destination information of the third information request indicates the lower terminal device 621. Therefore, the lower superimposing device 42 performs an acquisition determination process (S23), and the lower superimposing devices 41 and 43 perform an acquired determination process (S26).
- the buffer unit 407 of the lower level superimposing device 42 stores the terminal information of the lower level terminal device 621
- the lower level superimposing device 42 performs the second response process (S30).
- the terminal information of the lower-level terminal device 621 is transmitted to the higher-level superimposing device 3A by the superimposed signal together with the end information of the lower-level terminal device 622.
- the upper superimposing apparatus 3A transmits only the terminal information of the lower terminal device 621 corresponding to the destination information of the third information request to the upper terminal device 5.
- the storage unit 307 stores end information of the lower-level terminal device 622.
- the third information request is the third information request in the collection process, and thus the lower superimposing devices 41 and 43 respectively end the processing.
- the upper superimposing apparatus 3A determines whether the terminal information of the lower terminal device 622 is stored in the storage unit 307. Since the storage unit 307 stores the terminal information of the lower terminal device 622, the upper superimposing apparatus 3A transmits the end information of the lower terminal device 622 to the upper terminal device 5 and ends the process. Therefore, the fourth information request is not transmitted to the lower superimposing devices 41, 42, and 43.
- the upper superimposing apparatus 3A determines whether or not the terminal information of the lower terminal device 631 is stored in the storage unit 307. Since the storage unit 307 does not store the terminal information of the lower-level terminal device 631, the higher-level superimposing device 3A transmits a fifth information request to the lower-level superimposing devices 41, 42, and 43 using a superimposed signal.
- the lower superimposing devices 41, 42, 43 receives the fifth information request (S21), it performs destination determination processing (S22).
- the destination information of the fifth information request indicates the lower terminal device 631. Therefore, the lower superimposing device 43 performs an acquisition determination process (S23), and the lower superimposing devices 41 and 42 perform an acquired determination process (S26).
- the buffer unit 407 of the lower level superimposing device 43 stores the terminal information of the lower level terminal device 631
- the lower level superimposing device 43 performs the second response process (S30).
- the terminal information of the lower-level terminal device 631 is transmitted to the higher-level superimposing device 3A by the superimposed signal together with the end information of the lower-level terminal device 632.
- the upper superimposing apparatus 3A transmits only the terminal information of the lower terminal device 631 corresponding to the destination information of the fifth information request to the upper terminal device 5.
- the storage unit 307 stores end information of the lower-level terminal device 632.
- the fifth information request is the fourth information request in the collection process, and thus the lower superimposing apparatuses 41 and 42 respectively end the processing.
- the upper superimposing apparatus 3A determines whether or not the terminal information of the lower terminal device 632 is stored in the storage unit 307. Since the storage unit 307 stores the terminal information of the lower terminal device 632, the upper superimposing apparatus 3A transmits end information of the lower terminal device 632 to the upper terminal device 5 and ends the process. Therefore, the sixth information request is not transmitted to the lower superimposing devices 41, 42, and 43.
- the upper terminal device 5 acquires the terminal information of each lower terminal device 611, 612, 621, 622, 631, 632 by performing the collection process.
- a plurality of terminal devices 6 are connected to one lower superposition device 4, and the information acquisition unit 402 is connected to the terminal connection unit 401 at a designated timing.
- the terminal information is acquired from all the terminal devices 6 that are present and stored in the buffer unit 407.
- a plurality of first terminal devices 6 are connected to the first terminal connection unit 401.
- the information acquisition unit 402 is configured to acquire terminal information from each of the plurality of first terminal devices 6 connected to the first terminal connection unit 401 at a predetermined timing.
- the information acquisition unit 402 also receives information from all the lower-level terminal devices 6 at a designated timing even for a plurality of lower-level terminal devices 6 connected to the terminal connection unit 401.
- Terminal information is acquired and stored in the buffer unit 407. Therefore, compared with the case where the lower superimposing apparatus 4 obtains terminal information one by one every time it receives an information request for each of the plurality of lower terminal devices 6 connected to the terminal connection unit 401, The time lag generated in the terminal information of the lower terminal device 6 can be reduced.
- the lower superimposition apparatus 4 when receiving the information request from the upper superposition apparatus 3, transmits the terminal information acquired from all the terminal devices 6 connected to the terminal connection unit 401 to the communication unit.
- the upper superimposing apparatus 3 that has returned from 403 includes an accumulation unit 307 that accumulates the terminal information returned from the lower superimposing apparatus 4, and requests information from the terminal device (upper terminal apparatus) 5 that is the terminal information receiving side. Only the terminal information of the destination terminal device 6 is output from the storage unit 307.
- the information request includes destination information indicating the first terminal device 6 from which the second terminal device 5 requests endless information.
- the information acquisition unit 402 receives an information request from the second superimposing device 3 through the first communication unit 403, the information acquisition unit 402 acquires the end information of each of the plurality of first terminal devices 6 from the buffer unit 407 and passes through the first communication unit 403. It is configured to transmit to the second superimposing device 3.
- the second superimposing device 3 receives the end non-information from the first superimposing device 4, the second superimposing device 3 stores the received end uninformation, and the first terminal device 6 indicated by the destination information included in the information request from the stored end uninformation. It is configured to select corresponding end-unknown information and transmit it to the second terminal device.
- the lower superimposing device 4 in response to the information request from the upper superimposing device 3, the lower superimposing device 4 collectively returns the terminal information of the plurality of lower terminal devices 6 connected to the terminal connection unit 401.
- the upper superimposing apparatus 3 that has received the terminal information from the lower superimposing apparatus 4 does not communicate with the lower superimposing apparatus 4 again and receives the information request for requesting the acquired terminal information.
- a reply can be made to the terminal device 5.
- the number of communications between the upper superimposing apparatus 3 and the lower superimposing apparatus 4 is reduced, and the response time from when the upper superimposing apparatus 3 issues an information request until the terminal information is returned is shortened. .
- the upper superimposing apparatus 3 and the lower superimposing apparatus 4 have been described as separate apparatuses.
- the superimposing apparatus used as the lower superimposing apparatus 4 may be used as the upper superimposing apparatus 3. Good.
- the superimposing device is configured such that the function as the upper superimposing device 3 and the function as the lower superimposing device 4 can be arbitrarily switched using a dip switch or the like.
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Abstract
Description
本実施形態の通信システムは、図1に示すように、2線式の伝送路2に接続される伝送ユニット1を備えた通信システムである。
本実施形態の通信システムは、図7に示すように下位端末機器6が1台の下位重畳装置4につき複数台ずつ接続されている点が、実施形態1の通信システムと相違する。すなわち、本実施形態の通信システムでは、第1端末接続部401には、複数の第1端末機器6が接続されている。また、本実施形態の通信システムは、図8に示すように、上位重畳装置(第2重畳装置)3Aが蓄積部307を有している点で実施形態1の通信システムと異なる。
Claims (9)
- それぞれ伝送路に接続され所定の端未情報を有する複数の第1端末機器と、
前記伝送路に接続され前記第1端末機器に前記端未情報を要求する情報要求を送る第2端末機器と、
前記第1端末機器と前記伝送路との間に介在される第1重畳装置と、
前記第2端末機器と前記伝送路との間に介在され前記第2端末機器から前記情報要求を受け取る第2重畳装置と、
を備え、
前記第1重畳装置は、
前記第1端末機器との接続に用いられる端末接続部と、
前記伝送路に接続され、前記伝送路を利用できる利用可能期間において前記第2重畳装置と通信する通信部と、
前記端末接続部に接続された前記第1端末機器から前記端末情報を所定のタイミングで取得する情報取得部と、
前記情報取得部によって取得された前記端末情報を記憶するバッファ部と、
を有し、
前記第2重畳装置は、前記第2端末機器から前記情報要求を受け取ると、前記利用可能期間において前記情報要求を前記第1重畳装置に送信するように構成され、
前記情報取得部は、前記通信部を通じて前記情報要求を前記第2重畳装置から受け取ると、前記バッファ部から前記端未情報を取得して前記通信部を通じて前記第2重畳装置に送信するように構成され、
前記第2重畳装置は、前記端未情報を受け取ると、前記端未情報を前記第2端末機器に与えるように構成される
ことを特徴とする通信システム。 - 前記所定のタイミングは、前記伝送路を通じて前記通信部が受け取ったトリガによって決定される
ことを特徴とする請求項1記載の通信システム。 - 前記トリガは、前記情報要求である
ことを特徴とする請求項2記載の通信システム。 - 複数の前記第1重畳装置を備え、
前記情報要求は、前記第2端末機器が前記端未情報を要求する前記第1端末機器を示す宛先情報を含み、
前記情報取得部は、宛先判定処理と、取得判定処理と、第1応答処理と、第2応答処理と、第3応答処理と、を行うように構成され、
前記情報取得部は、前記通信部を通じて前記情報要求を前記第2重畳装置から受け取ると前記宛先判定処理を行うように構成され、
前記情報取得部は、前記宛先判定処理では、受け取った前記情報要求の前記宛先情報の示す前記第1端末機器に前記端末接続部に接続された前記第1端末機器が一致するか否かを判定するように構成され、
前記情報取得部は、前記端末接続部に接続された前記第1端末機器が前記宛先情報の示す前記第1端末機器に一致すると前記宛先判定処理で判定すると前記取得判定処理を行い、前記端末接続部に接続された前記第1端末機器が前記宛先情報の示す前記第1端末機器に一致しないと前記宛先判定処理で判定すると前記第1応答処理を行うように構成され、
前記情報取得部は、前記第1応答処理では、前記端末接続部に接続された前記第1端末機器から前記端末情報を取得するように構成され、
前記情報取得部は、前記取得判定処理では、前記宛先情報が示す前記第1端末機器の前記端未情報が前記バッファ部に記憶されているか否かを判定するように構成され、
前記情報取得部は、前記宛先情報が示す前記第1端末機器の前記端未情報が前記バッファ部に記憶されていると前記取得判定処理で判定すると前記第2応答処理を行い、前記宛先情報が示す前記第1端末機器の前記端未情報が前記バッファ部に記憶されていないと判定すると前記取得判定処理で前記第3応答処理を行うように構成され、
前記情報取得部は、前記第2応答処理では、前記宛先情報が示す前記第1端末機器の前記端未情報が前記バッファ部から取得して前記通信部を通じて前記第2重畳装置に送信するように構成され、
前記情報取得部は、前記第3応答処理では、前記端末接続部に接続された前記第1端末機器から前記端末情報を取得して前記通信部を通じて前記第2重畳装置に送信するように構成される
ことを特徴とする請求項3記載の通信システム。 - 前記第2端末機器は、前記第1端末機器に順番に前記情報要求を送る収集処理を行うように構成され、
前記収集処理で送信される前記情報要求は共通の識別情報を含み、
前記情報取得部は、受け取った前記情報要求の前記識別情報と同じ前記識別情報を含む前記情報要求を既に受け取っているか否かを判定する既得判定処理を行うように構成され、
前記情報取得部は、受け取った前記情報要求の前記識別情報と同じ前記識別情報を含む前記情報要求を既に受け取っていると前記既得判定処理で判定すると前記第1応答処理を行わず、受け取った前記情報要求の前記識別情報と同じ前記識別情報を含む前記情報要求を既に受け取っていないと前記既得判定処理で判定すると前記第1応答処理を行うように構成される
ことを特徴とする請求項4記載の通信システム。 - 前記端末接続部には、複数の前記第1端末機器が接続され、
前記情報取得部は、前記端末接続部に接続された前記複数の第1端末機器の各々から前記端末情報を前記所定のタイミングで取得するように構成される
ことを特徴とする請求項1~5のうちいずれか1項記載の通信システム。 - 前記情報要求は、前記第2端末機器が前記端未情報を要求する前記第1端末機器を示す宛先情報を含み、
前記情報取得部は、前記通信部を通じて前記情報要求を前記第2重畳装置から受け取ると、前記バッファ部から前記複数の第1端末機器それぞれの前記端未情報を取得して前記通信部を通じて前記第2重畳装置に送信するように構成され、
前記第2重畳装置は、前記第1重畳装置から前記端未情報を受け取ると、受け取った前記端未情報を記憶し、記憶した前記端未情報から前記情報要求に含まれる前記宛先情報が示す前記第1端末機器に該当する前記端未情報を選択して前記第2端末機器に送信するように構成される
ことを特徴とする請求項6記載の通信システム。 - 前記伝送路は、前記第1重畳装置と前記第2重畳装置との間の通信プロトコルとは異なる通信プロトコルに基づく伝送信号の伝送に用いられ、
前記利用可能期間は、前記伝送信号において重畳信号を重畳できる期間であり、
前記通信部は、前記重畳信号により前記第2重畳装置と通信するように構成され、
前記第2重畳装置は、前記重畳信号を利用して前記情報要求を前記第1重畳装置に送信するように構成される
ことを特徴とする請求項1~7のうちいずれか1項記載の通信システム。 - 所定の端未情報を有する端末機器が接続される端末接続部と、
伝送路に接続され、前記伝送路を利用できる利用可能期間に通信を行う通信部と、
前記端末接続部に接続された前記端末機器から前記端末情報を所定のタイミングで取得する情報取得部と、
前記情報取得部によって取得された前記端末情報を記憶するバッファ部と、
を備え、
前記情報取得部は、前記端末機器に前記端未情報を要求する情報要求を前記通信部を通じて受け取ると、前記バッファ部から前記端未情報を取得し、前記通信部を通じて前記端末情報を前記伝送路に送信するように構成される
ことを特徴とする重畳装置。
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01296833A (ja) * | 1988-05-25 | 1989-11-30 | Matsushita Electric Ind Co Ltd | 稼動監視装置 |
JPH1144477A (ja) | 1997-07-25 | 1999-02-16 | Hitachi Ltd | 冷蔵庫 |
JPH1180690A (ja) | 1997-07-17 | 1999-03-26 | Oji Paper Co Ltd | タイヤ用粘着剤組成物および粘着シート |
JPH1195362A (ja) | 1997-09-18 | 1999-04-09 | Konica Corp | ハロゲン化銀写真感光材料及び画像形成方法 |
JP2000295245A (ja) * | 1999-04-12 | 2000-10-20 | Nec Mobile Commun Ltd | 中継接続無線システムおよび中継接続無線制御方法 |
JP2001144868A (ja) * | 2000-09-21 | 2001-05-25 | Tamura Electric Works Ltd | ガス検針システム |
JP2009225328A (ja) | 2008-03-18 | 2009-10-01 | Panasonic Electric Works Co Ltd | 中継装置 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5272435A (en) | 1975-12-15 | 1977-06-16 | Matsushita Electric Works Ltd | Timeedivision multiplex transmission system |
JPS5272436A (en) | 1975-12-15 | 1977-06-16 | Matsushita Electric Works Ltd | Timeedivision multiplex transmission system |
JPS5310235A (en) | 1976-07-16 | 1978-01-30 | Mitsubishi Electric Corp | Simple type wire telecommunication unit |
AU2001275517A1 (en) * | 2000-06-07 | 2001-12-17 | Telemics, Inc. | Method and system for monitoring and controlling working components |
KR100659474B1 (ko) * | 2004-07-09 | 2006-12-20 | (주)누리텔레콤 | 가스 사용패턴 분석을 이용한 원격 누설가스 감지 시스템 |
JP2007074377A (ja) * | 2005-09-07 | 2007-03-22 | Matsushita Electric Ind Co Ltd | 伝送速度制御装置及び通信システム |
WO2007059270A2 (en) * | 2005-11-16 | 2007-05-24 | Advanced Broadband Solutions, Inc. | System and method for providing content over a network |
-
2010
- 2010-10-25 JP JP2010239004A patent/JP5379772B2/ja active Active
-
2011
- 2011-10-25 US US13/879,618 patent/US9319339B2/en not_active Expired - Fee Related
- 2011-10-25 WO PCT/JP2011/074548 patent/WO2012057136A1/ja active Application Filing
- 2011-10-25 KR KR1020137006950A patent/KR101446640B1/ko active IP Right Grant
- 2011-10-25 CN CN201180058074.5A patent/CN103238296B/zh active Active
- 2011-10-25 EP EP11836269.8A patent/EP2634968A4/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01296833A (ja) * | 1988-05-25 | 1989-11-30 | Matsushita Electric Ind Co Ltd | 稼動監視装置 |
JPH1180690A (ja) | 1997-07-17 | 1999-03-26 | Oji Paper Co Ltd | タイヤ用粘着剤組成物および粘着シート |
JPH1144477A (ja) | 1997-07-25 | 1999-02-16 | Hitachi Ltd | 冷蔵庫 |
JPH1195362A (ja) | 1997-09-18 | 1999-04-09 | Konica Corp | ハロゲン化銀写真感光材料及び画像形成方法 |
JP2000295245A (ja) * | 1999-04-12 | 2000-10-20 | Nec Mobile Commun Ltd | 中継接続無線システムおよび中継接続無線制御方法 |
JP2001144868A (ja) * | 2000-09-21 | 2001-05-25 | Tamura Electric Works Ltd | ガス検針システム |
JP2009225328A (ja) | 2008-03-18 | 2009-10-01 | Panasonic Electric Works Co Ltd | 中継装置 |
Also Published As
Publication number | Publication date |
---|---|
EP2634968A1 (en) | 2013-09-04 |
KR101446640B1 (ko) | 2014-10-01 |
CN103238296B (zh) | 2015-11-25 |
CN103238296A (zh) | 2013-08-07 |
JP5379772B2 (ja) | 2013-12-25 |
JP2012095008A (ja) | 2012-05-17 |
US20130208733A1 (en) | 2013-08-15 |
KR20130049814A (ko) | 2013-05-14 |
EP2634968A4 (en) | 2016-07-13 |
US9319339B2 (en) | 2016-04-19 |
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