WO2012057145A1 - Système de communications et terminal de communications superposées - Google Patents

Système de communications et terminal de communications superposées Download PDF

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Publication number
WO2012057145A1
WO2012057145A1 PCT/JP2011/074560 JP2011074560W WO2012057145A1 WO 2012057145 A1 WO2012057145 A1 WO 2012057145A1 JP 2011074560 W JP2011074560 W JP 2011074560W WO 2012057145 A1 WO2012057145 A1 WO 2012057145A1
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WIPO (PCT)
Prior art keywords
superimposed
period
signal
communication
transmission
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PCT/JP2011/074560
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English (en)
Japanese (ja)
Inventor
松本　正
剛 椙山
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パナソニック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Priority to CN201180051701.2A priority Critical patent/CN103181141B/zh
Priority to KR1020137009641A priority patent/KR101410409B1/ko
Publication of WO2012057145A1 publication Critical patent/WO2012057145A1/fr

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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]
    • H04L12/40—Bus networks
    • H04L12/403—Bus networks with centralised control, e.g. polling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols

Definitions

  • the present invention comprises a terminal device that communicates using a transmission signal that is repeatedly sent from a transmission unit to a transmission line, and a superimposed communication terminal that communicates using a superimposed signal superimposed on the transmission signal.
  • the present invention relates to a communication system and a superimposed communication terminal.
  • a communication system in which a transmission unit (master unit) and a plurality of terminal devices (slave units) are connected to a transmission path and communication is performed between each terminal device and the transmission unit has been widely used.
  • the transmission unit periodically monitors the state of the terminal device, and when there is a change in the state of the terminal device, the transmission unit performs other processing to perform processing corresponding to the state change.
  • There are systems that send signals to terminal devices see, for example, Japanese Patent No. 1180690, Japanese Patent No. 1195362, and Japanese Patent No. 1144477).
  • the terminal devices always communicate with each other via the transmission unit, and the transmission unit polls the terminal device, so the communication speed is low, for example, relatively data such as an analog amount. 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 transmission signal is a signal of a time division system that is divided into a plurality of periods in the time axis direction for each frame, and a part of the period is assigned as a superimposable period in which the superposed signal can be superposed. That is, the superimposition communication terminal (communication device) analyzes the state of the transmission signal, and sets a transmission path (signal line) common to the transmission signal in the superimposable period (communication adaptation period) assigned to a part of the transmission signal. Communication is performed using a transmitted superimposed signal (packet) (see, for example, International Publication No. 2008/117722).
  • packet transmitted superimposed signal
  • the superimposition communication terminal divides the transmission data into a plurality of data and sequentially transmits every superimposable period when the amount of transmission data is large and cannot be transmitted within one superimposable period. To do. That is, since transmission data is transmitted over a plurality of superimposable periods, the superimposed communication terminal cannot transmit the transmission data in one frame of the transmission signal if the amount of transmission data increases.
  • the transmission data may be transmitted over a plurality of frames of transmission signals.
  • each superimposition communication terminal as a master is a superimposition communication terminal as a slave paired with each other by a superimposition signal adopting a unique protocol. Communication will be performed.
  • an object of the present invention is to provide a communication system and a superimposed communication terminal in which communication errors are unlikely to occur even when a plurality of sets of superimposed communication terminals communicate with each other using a superimposed signal employing a unique protocol.
  • the communication system of the present invention employs a transmission unit that repeatedly transmits a transmission signal to a transmission line, a terminal device that communicates using the transmission signal, and a signal that is superimposed on the transmission signal and has its own protocol.
  • a communication system in which a plurality of sets of superposition communication terminals that communicate using a superposition signal are connected to the transmission path, wherein the transmission signal is divided into a plurality of periods in a time axis direction for each frame, and partly Is a time-division-type signal in which the superimposition signal can be superimposed and the remaining period is a non-superimposition period that is not used for superimposition of the superposition signal
  • the superposition communication terminal includes a storage unit that stores a unique protocol, and a superposition that sends the superposition signal of the specific protocol stored in the storage unit to the transmission path
  • the output unit, the signal monitoring unit that monitors the transmission signal on the transmission path, and the superimposable period that is used between the superimposed signals having different specific protocols are stored
  • each superimposition communication terminal includes a period selection unit that selects a superimposable period used to superimpose a superimposition signal of a unique protocol. Can be avoided. As a result, there is an advantage that communication errors are unlikely to occur even when a plurality of sets of superimposed communication terminals communicate with each other using a superimposed signal employing a unique protocol.
  • each set of superimposed communication terminals in the plurality of sets of superimposed communication terminals includes a superimposed communication terminal as a master and a superimposed communication terminal as at least one slave, and the superimposed communication terminal as the master. It is desirable to communicate with the superimposed communication terminal as the slave forming a set using a superimposed signal that employs a unique protocol.
  • the transmission signal includes a plurality of periods in which the superimposable period is included in one frame, and the period selection unit performs the superimposition in units of each period in one frame of the transmission signal. It is desirable to select a possible period.
  • the period selection unit selects the superimposable period in units of one frame of the transmission signal.
  • each superimposition communication terminal is provided with an operation unit that receives an operation input, and it is more preferable that the period selection unit selects the superimposable period according to the operation input to the operation unit. .
  • the storage unit stores, in addition to the unique protocol, a protocol common to another set of superimposed communication terminals, and the period selection unit is configured to transmit the other signal in the superimposable period of the transmission signal. It is more preferable that communication information is exchanged by communication using the superposition signal of the common protocol and the superposition signal of the common protocol, and the superposition possible period is automatically selected based on the communication information.
  • the communication information is a data amount transmitted and received by each set of superimposed communication terminals in the plurality of sets of superimposed communication terminals using a superimposed signal that employs a unique protocol.
  • the communication information is a frequency at which each set of superimposed communication terminals in the plurality of sets of superimposed communication terminals performs communication using a superimposed signal that employs a unique protocol.
  • the storage unit stores, in addition to the unique protocol, a protocol common to another set of superimposed communication terminals, and the period selection unit is configured to transmit the other signal in the superimposable period of the transmission signal.
  • the superposition communication terminal of the common protocol using the superposition signal of the common protocol, and then superimposing the superposition signal of the unique protocol stored in the storage unit for one or more subsequent superposition possible periods It is more desirable to make a use request for requesting use and select the superimposable period according to the use request if the use request is accepted by the period selection unit of the other set of superimposed communication terminals.
  • the transmission signal includes a plurality of periods in which the superimposable period is included in one frame, and the period selection unit determines that the superimposable period during which the use request can be made is the transmission signal. It is more preferable that each period in each frame is assigned to each of the superimposed communication terminals, and that the use request is made in order from the previous use request.
  • two sets of superimposed communication terminals of the plurality of sets of superimposed communication terminals include first and second period selection units as the period selection unit, respectively, and the first and second period selections
  • allocation of the superimposable period during which the use request can be performed is performed between the first and second period selection units. It is more desirable to replace it.
  • two sets of superimposed communication terminals of the plurality of sets of superimposed communication terminals include first and second period selection units as the period selection unit, respectively, for the same frame of the transmission signal.
  • the first period selection unit makes the use request prior to the second period selection unit
  • the second period selection unit that has made the use request after the first requests the use request first.
  • the use request is made again in the superimposable period immediately after the superposition of the superposition signal from the superposition communication terminal provided with the first period selection unit for which the use request is granted.
  • a priority is added to the use request, and the period selection unit transmits the same frame of the transmission signal from two or more superimposition communication terminals of the plurality of superimposition communication terminals.
  • the period selection unit transmits the same frame of the transmission signal from two or more superimposition communication terminals of the plurality of superimposition communication terminals.
  • the superposition communication terminal of the present invention employs a transmission unit that repeatedly transmits a transmission signal to a transmission path, a terminal device that communicates using the transmission signal, and a signal that is superimposed on the transmission signal and has its own protocol.
  • the transmission signal is used in a communication system in which a plurality of sets of superimposed communication terminals that communicate using the superimposed signal are connected to the transmission path.
  • the transmission signal is divided into a plurality of periods in the time axis direction for each frame.
  • the period of the part is a superimposable period in which the superimposition signal can be superimposed, and the remaining period is a non-superimposition period that is not used for superimposition of the superimposition signal, each storing a unique protocol
  • a period selection unit that selects a superimposable period, and the superimposition sending unit is superimposed on the superimposable period selected by the period selection unit among the transmission signals monitored by the signal monitoring unit. The superimposition signal is transmitted to.
  • FIG. 1 is a schematic system configuration diagram of a communication system according to Embodiment 1.
  • FIG. 2 is a schematic block diagram of a superimposed communication terminal according to Embodiment 1.
  • FIG. 3 is a time chart showing the operation of the first embodiment. 6 is a time chart showing another operation of the first embodiment. 6 is a time chart showing the operation of the second embodiment. 10 is a time chart showing another operation of the second embodiment. 10 is a time chart illustrating the operation of the third embodiment. 10 is a time chart showing another operation of the third embodiment. 12 is a time chart showing still another operation of the third embodiment.
  • the communication system of this embodiment is a communication system including a transmission unit 4 connected to a two-wire transmission line 2 as shown in FIG. 1A.
  • This communication system includes a plurality of terminal devices 301 and 302 that are connected to the transmission line 2 and communicate with the transmission unit 4, and a plurality of superimposed communication terminals 101, 102, 111, and 112 that are connected to the transmission line 2 and directly communicate with each other. And.
  • communication is performed using a transmission signal transmitted through 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.
  • terminal devices 301 and 302 when the terminal devices 301 and 302 are not distinguished from each other, they are collectively referred to as the terminal device 3, and when the respective superimposed communication terminals 101, 102, 111, and 112 are not distinguished from each other, they are collectively referred to as the superimposed communication terminal 1.
  • the terminal device 3 when the terminal devices 301 and 302 are not distinguished from each other, they are collectively referred to as the terminal device 3, and when the respective superimposed communication terminals 101, 102, 111, and 112 are not distinguished from each other, they are collectively referred to as the superimposed communication terminal 1.
  • two terminal devices 3 and four superimposed communication terminals 1 are connected to the transmission path 2, but three or more terminal devices 3 and five or more superimposed communication terminals 1 are connected. Also good.
  • an impedance matching module 5 having a high impedance with respect to the superimposed signal is inserted.
  • the impedance matching module 5 may be provided between each of the terminal devices 3 and the transmission path 2.
  • the plurality of terminal devices 3 are connected in parallel to the transmission unit 4 via the transmission path 2.
  • the transmission unit 4 and the terminal device 3 are time-division multiplex transmission systems (hereinafter referred to as “basic systems”) in which data transmission from the transmission unit 4 to the terminal device 3 and data transmission from the terminal device 3 to the transmission unit 4 are performed in a time division manner. ”).
  • the terminal device 3 is classified into two types: a monitoring terminal provided with a switch and a sensor (not shown) and a control terminal provided with a load (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.
  • the terminal device 3 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 4. When receiving the control information, the transmission unit 4 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 4 transmits to the transmission line 2 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 31, a preliminary period 32, a transmission period 33, a return period 34, an interruption period 35, a short-circuit detection period 36, and a pause period 37. 24V) time division multiplexed signal.
  • the preliminary interruption period 31 is a period for detecting a secondary interruption
  • the preliminary period 32 is a period set in accordance with the interruption period 35 and the short-circuit detection period 36
  • the transmission period 33 is for transmitting data to the terminal device 3. It is a period for transmission.
  • the return period 34 is a time slot for receiving a return signal from the terminal device 3
  • the interrupt period 35 is a period for detecting an interrupt signal described later
  • the short circuit detection period 36 is a period for detecting a short circuit. It is.
  • the pause period 37 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.
  • the transmission unit 1 repeatedly transmits a transmission signal having a signal waveform as shown in FIG. 2 to the transmission line 2, and the transmission signal is divided into the above-described plurality of periods 31 to 37 in the time axis direction for each frame. Has been. These periods 31 to 37 are functionally divided and are actually continuous periods.
  • One frame here corresponds to one cycle of transmission signal repetition, and in this embodiment, one frame extends from the transmission signal interruption period 35 to the return period 34 (see FIG. 3).
  • each terminal device 3 when the address data included in the transmission period 33 of the transmission signal received via the transmission path 2 matches the address stored in each storage unit (not shown), the load is reduced from the transmission signal. Capture control information for control. Further, the terminal device 3 returns the control information as a current mode signal (a signal transmitted by short-circuiting the transmission line 2 via an appropriate low impedance) in synchronization with the transmission signal return period 34. In addition, the power supply of the internal circuit of the terminal device 3 is supplied by rectifying and stabilizing the transmission signal transmitted through the transmission path 2.
  • the transmission unit 4 always performs polling for sequentially accessing the terminal device 3 by cyclically changing the address data included in the transmission signal. At the time of constant polling, the terminal device 3 whose address data included in the transmission signal matches its own address operates if the control information is included in the transmission signal. Return to the transmission unit 4.
  • the transmission unit 4 When the transmission unit 4 receives an interrupt signal generated in response to a monitoring input such as a switch in any of the monitoring terminals (terminal device 3), the transmission unit 4 searches for the terminal device 3 that generated the interrupt signal, The terminal device 3 is accessed to perform interrupt polling.
  • the transmission unit 4 always transmits a transmission signal in which the mode data is in the normal mode, and detects an interrupt signal generated in the monitoring terminal (terminal device 3) in synchronization with the transmission signal interrupt period 35.
  • the transmission signal in which the mode data is set to the interrupt polling mode is transmitted.
  • the terminal device 3 that has generated the interrupt signal synchronizes itself with the return period 34 of the transmission signal.
  • the lower bits of the address of are returned as return data.
  • the transmission unit 4 can acquire the address of the terminal device 3 that generated the interrupt signal.
  • the transmission unit 4 When the address of the terminal device 3 that generated the interrupt signal is acquired by the transmission unit 4, the transmission unit 4 sends a transmission signal requesting the terminal device 3 to return control information, and the terminal device 3 The control information corresponding to the monitoring input such as is returned to the transmission unit 4. When receiving the control information, the transmission unit 4 gives an instruction to clear the monitoring input of the corresponding terminal device 3, and the terminal device 3 returns clear of the monitoring input.
  • the transmission unit 4 that has received the control information transmits the control information to be transmitted to the terminal device (control terminal device) 3 associated with the terminal device (monitoring terminal device) 3 that is the transmission source of the control information by the correspondence relationship of the addresses. Generate.
  • the transmission unit 4 sends a transmission signal including this control information to the transmission line 2 to control a load attached to the terminal device (control terminal device) 3.
  • the terminal devices (monitoring terminal unit, control terminal unit) 3 communicate with each other via the transmission unit 4 in accordance with the polling / selecting protocol.
  • a plurality of superimposed communication terminals 1 communicate with each other using a superimposed signal superimposed on a transmission signal while sharing the basic system and the transmission path 2.
  • the superimposed communication terminals 101, 102, 111, 112 connected to the transmission path 2 function as a master, and the remaining superimposed communication terminals 102, 112 Functions as a slave.
  • Superimposition communication terminal 101 as a master and superposition communication terminal 102 as a slave form a pair, and communicate with each other by a superposition signal according to a first protocol.
  • superimposition communication terminal 111 as a master and superposition communication terminal 112 as a slave form a pair, and communicate with each other by a superimposition signal according to a second protocol different from the first protocol.
  • the superimposed communication terminals 101 and 111 as masters perform polling by transmitting a superimposed signal to the superimposed communication terminals 102 and 112 as slaves that form a pair with each of the superimposed communication terminals 102 and 112 as responses to the polling. Get the data from each.
  • a plurality of superimposed communication terminals as slaves that form a pair with each of the superimposed communication terminals 101 and 111 as masters may be provided.
  • each of the superimposed communication terminals 101 and 111 sequentially polls the superimposed communication terminal as a slave that forms a pair with each.
  • the monitoring device 6 is connected to the superimposed communication terminals 101 and 111 as masters, and the monitored device 7 is connected to the superimposed communication terminals 102 and 112 as slaves.
  • the monitored device 7 outputs monitoring information transmitted between the superimposed communication terminals 1 to the superimposed communication terminals 102 and 112, and the monitoring device 6 acquires the monitoring information from the superimposed communication terminals 101 and 111.
  • the monitored device 7 and the monitoring device 6 exchange data with the superimposed communication terminal 1 by performing regular communication.
  • the superimposed communication terminal 1 that performs communication (data transmission) via the transmission path 2, but the monitored device 7 generates data to be transmitted (monitoring information) and processes the received data. It is the monitoring device 6 that does.
  • the superimposition communication terminal 1 functions as an adapter that performs communication by converting data from the monitored device 7 or the monitoring device 6 connected thereto and sending it to the transmission line 2.
  • the monitoring information output from the monitored device 7 includes, for example, information such as power consumption, temperature and humidity of the electric device.
  • the monitored device 7 connected to the superimposed communication terminal 102 measures power consumption
  • the monitored device 7 connected to the superimposed communication terminal 112 measures temperature / humidity, and monitors each measurement result as monitoring information. Is output to the monitoring device 6 via the superimposed communication terminal 1.
  • the superimposed communication terminal 1 includes a superimposed sending unit 11 and a superimposed receiving unit 12 connected to the transmission path 2, a processing unit 13 connected to the superimposed sending unit 11 and the superimposed receiving unit 12, and a process And an interface unit 14 connected to the unit 13.
  • the superimposition transmission unit 11 transmits a superimposition signal
  • the superimposition reception unit 12 receives the superimposition signal.
  • the interface unit 14 is connected to the monitoring device 6 or the monitored device 7.
  • the processing unit 13 acquires monitoring information from the monitored device 7 via the interface unit 14, and sends this monitoring information from the superposition sending unit 11 to the transmission path 2 by a superposition signal. To do.
  • the processing unit 13 acquires monitoring information from the superimposed signal received by the superimposed receiving unit 12, and outputs the monitoring information to the monitoring device 6 via the interface unit 14.
  • the superimposition communication terminal 1 sends a packet including data to be transmitted to another superimposition communication terminal 1 to the transmission path 2 and receives a packet transmitted by the other superimposition communication terminal 1.
  • Packets transmitted and received between the superimposed communication terminals 1 are superimposed on the transmission signal transmitted from the transmission unit 4.
  • communication between the terminal devices 3 is performed via the transmission unit 4, whereas communication between the superimposed communication terminals 1 is directly performed between the superimposed communication terminals 1 without passing through the transmission unit 4. Therefore, the communication between the superimposed communication terminals 1 can increase the communication speed as compared with the communication between the terminal devices 3, and is suitable for transmission of information having a relatively large amount of data such as an analog amount (power consumption or the like).
  • the superimposed communication terminal 1 also includes a signal monitoring unit 15 (see FIG. 1B) that monitors a transmission signal transmitted between the transmission unit 4 and the terminal device 3 of the basic system. Analyzes the data transmission status (hereinafter referred to as “state”).
  • the superimposition sending unit 11 determines whether or not the state analyzed by the signal monitoring unit 15 is in a situation suitable for superimposition of the superimposition signal, and transmits a superimposition 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 31 the preliminary period 32, and the pause period 37, even if the superimposed signal is superimposed, the communication by the transmission signal is not affected, and the superimposed signal is not easily influenced by the transmission signal.
  • overlapping possible period the transmission signal.
  • the time during which the transmission signal is stable at the high level or the low level is relatively short, and the superimposed signal is superimposed. It is easy to affect the communication by the transmission signal. Further, when the superimposed signal is superimposed in the other period, the superimposed signal is also easily affected by a signal (interrupt signal or return data) exchanged between the transmission unit 4 and the terminal device 3. 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 becomes a non-superimposable period for a predetermined time (for example, 300 ⁇ s) after the switching (rising or falling) of the period among the preliminary interruption period 31, the preliminary period 32, and the pause period 37.
  • a predetermined time for example, 300 ⁇ s
  • the superimposition sending unit 11 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 the superimposition signal only when it is determined as the superimposable period. ing.
  • the superimposition communication terminal 1 thus synchronizes with the transmission signal and superimposes the superimposition signal only during the period in which the transmission signal can be superimposed, thereby performing communication between the transmission signal using the common transmission path 2 and communication using the superposition signal. Avoid interference.
  • the superimposing communication terminal 1 interrupts communication at the end of the superimposable period and can perform the next superimposition. Send the remaining data in the period.
  • the power supply to each part of the superimposition communication terminal 1 is supplied by rectifying and stabilizing the transmission signal transmitted from the transmission unit 4 via the transmission line 2 as in the terminal device 3 of the basic system. (Concentrated power supply method).
  • the power supply to each part of the superimposed communication terminal 1 is not limited to this configuration, and may be performed by a system (local power supply system) that is supplied by rectifying and stabilizing commercial power.
  • each of the superimposed communication terminals 101 and 111 as the master communicates with the superimposed communication terminals 102 and 112 as the slaves that form a pair with each other by a superimposed signal that employs a unique protocol.
  • the unique protocol of each set of superimposed communication terminals 1 used for transmission and reception of superimposed signals is stored in advance in the storage unit 16 (see FIG. 1B) of each superimposed communication terminal 1.
  • each superimposition communication terminal 1 has a period selection unit 17 that selects a superimposable period used for superimposition of the superimposition signal of the protocol stored in the storage unit 16.
  • the period selection unit 17 selects a superimposable period to be used for superimposing superimposed signals of a protocol unique to each other so that superimposable periods to be used between superimposed signals with different protocols do not overlap.
  • the period selection unit 17 of each set of superposition communication terminals 1 allows the superposition possible period used by the superposition communication terminal 1 of its own set so that it does not overlap with the superposition possible period used by another set of superposition communication terminals 1. Select.
  • the superimposition sending unit 11 uses the protocol stored in the storage unit 16 so as to be superposed on the superimposable period selected by the period selection unit 17 among the transmission signals monitored by the signal monitoring unit 15.
  • the superimposed signal is sent to the transmission line 2.
  • the period selection unit 17 determines in which superimposition possible period the superimposition of the superimposition signal of the protocol stored in the storage unit 16 is performed.
  • the transmission signal includes a plurality of periods (preliminary interrupt period 31, preliminary period 32, and pause period 37) that can be superimposed in one frame. Therefore, the period selection unit 17 selects a superimposable period to be used for superimposing the superimposed signal, with each period in one frame of the transmission signal as a unit, as shown in FIG.
  • the superimposition communication terminals 101 and 102 that transmit and receive a superimposition signal according to the first protocol select the pause period 37 of the transmission signal as a superimposable period to be used for superimposition of the superimposition signal by the period selection unit 17. ing.
  • the superimposition communication terminals 111 and 112 that transmit and receive the superimposition signal according to the second protocol use the period selection unit 17 to perform the superimposition possible period in which the preliminary interruption period 31 and the preliminary period 32 of the transmission signal are used for superimposition of the superimposition signal As selected.
  • the superimposition transmission unit 11 and the superimposition reception unit 12 of the superimposition communication terminals 101 and 102 perform communication by superimposing the superimposition signal P1 of the first protocol in the pause period 37 of the transmission signal.
  • the superimposition transmission unit 11 and the superimposition reception unit 12 of the superimposition communication terminals 111 and 112 perform communication by superimposing the superimposition signal P2 of the second protocol on the preliminary interruption period 31 and the preliminary period 32 of the transmission signal. .
  • the preliminary interruption period 31 and the preliminary period 32 of the transmission signal are allocated to the superimposed signal P2 of the second protocol
  • the pause period 37 is allocated to the superimposed signal P1 of the first protocol. It will be.
  • the superimposed communication terminal 1 is provided with a dip switch (not shown) as an operation unit that receives a user's operation input, and the period selection unit 17 operates an operation input (dip switch contact) to the operation unit.
  • the superimposable period used for the superposition of the superposition period is selected according to the output). For this reason, which superimposition possible period is assigned to a superimposition signal of which protocol can be arbitrarily designated by the user operating the operation unit.
  • the user needs to assign different superimposable periods for each protocol so that the superimposable periods used by the superimposed signals of different protocols do not overlap.
  • the superimposed communication terminal 1 is provided with a dip switch corresponding to each of the preliminary interruption period 31, the preliminary period 32, and the suspension period 37, and the period selection unit 17 is in the ON state.
  • a period corresponding to is set as a superimposable period used for superimposing the superimposed signal. For example, in the superimposed communication terminals 101 and 102 in which the first protocol is stored in the storage unit 16, if the DIP switch corresponding to the suspension period 37 is in an on state, the suspension period 37 is converted into a superimposed signal of the first protocol. Assigned.
  • each superimposition communication terminal 1 includes the period selection unit 17 that selects a superimposable period used for superimposition of a superimposition signal of a unique protocol. It is possible to avoid overlapping overlapping periods used between each other. That is, while a plurality of sets of superimposed communication terminals 1 communicate with each other using a superimposed signal that employs a unique protocol, the superimposed signals are transmitted in a superimposable period selected by each set of superimposed communication terminals 1 using the respective period selection units 17. By performing this communication, collision between superimposed signals can be avoided. Therefore, the above communication system has an advantage that communication errors are unlikely to occur even when a plurality of sets of superimposed communication terminals 1 communicate with each other using a superimposed signal employing a unique protocol.
  • the period selection unit 17 selects the superimposable period in units of each period in one frame of the transmission signal, communication using the superimposed signals of a plurality of protocols is possible in a relatively short span. Furthermore, since the period selection unit 17 selects a superimposable period according to an operation input to the operation unit, the superimposable period used for superimposition of the superimposition period is assigned to a superposition signal of a different protocol with a relatively simple configuration. Is possible.
  • the period selection unit 17 may be configured to select a superimposable period used for superimposing the superimposed signal in units of one frame of the transmission signal.
  • the transmission signal has one frame from the interruption period 35 to the return period 34.
  • the superimposition communication terminals 101 and 102 that transmit and receive the superimposition signal according to the first protocol are transmitted to the first, third, fifth, and seventh frames F1, F3, F5, and F7 by the period selection unit 17.
  • the superimposable period is selected as a superimposable period used for superimposing the superimposed signal.
  • the superimposition communication terminals 111 and 112 that transmit and receive the superimposition signal according to the second protocol use the period selection unit 17 to determine the superimposition signal superimposition period of the second, fourth, and sixth frames F2, F4, and F6. It is selected as the period that can be superimposed.
  • the superimposition transmission unit 11 and the superimposition reception unit 12 of the superimposition communication terminals 101 and 102 superimpose the first, third, fifth, and seventh frames F1, F3, F5, and F7 of the transmission signal. Communication is performed by superimposing a superimposition signal P1 of the first protocol in a possible period.
  • the superimposition transmission unit 11 and the superimposition reception unit 12 of the superimposition communication terminals 111 and 112 perform the superimposition signal P2 of the second protocol during the superimposition possible period of the second, fourth, and sixth frames F2, F4, and F6 of the transmission signal. Communication is performed by superimposing. In other words, as shown in FIG.
  • the transmission signal has a superimposable period (a pause period 37, a preliminary interruption period 31, and a preliminary period 32), and the superimposition signal P1 of the first protocol and the second protocol are superimposed for each frame. It is alternately assigned to the signal P2.
  • the period selection unit 17 selects the period in which the transmission signal can be superimposed in units of one frame, the time taken for communication by the superimposed signal of each protocol becomes relatively long. Therefore, the superimposition communication terminal 1 can shorten the time required for communication when the amount of data to be transmitted is large and cannot be transmitted in one superimposition possible period.
  • the communication system according to the present embodiment is different from the communication system according to the first embodiment in the method of selecting a period that can be overlapped by the period selection unit 17.
  • the period selection unit 17 selects a superimposable period according to an operation input by the user to the operation unit.
  • the period selection unit 17 performs communication between the superimposed communication terminals 1.
  • the superimposable period is automatically selected based on the exchanged communication information.
  • the communication information here is information relating to communication according to a protocol specific to each set of superimposed communication terminals 1, and includes, for example, the amount of data exchanged between the superimposed communication terminals 1 and the frequency of communication.
  • the period selection unit 17 uses a superimposed signal of a protocol (hereinafter referred to as a “common protocol”) common to another set of superimposed communication terminals 1 during a period in which a transmission signal can be superimposed. Communication information is exchanged by communication with the period selection unit 17 of the communication terminal 1. That is, the storage unit 16 of the superimposed communication terminal 1 stores a common protocol in addition to a protocol specific to each set of the superimposed communication terminal 1, and the superimposed transmission unit 11 and the superimposed reception unit 12 perform the superimposed signal based on the common protocol. Can be sent and received.
  • a common protocol hereinafter referred to as a “common protocol”
  • the period selection unit 17 performs communication using a superposition signal of a common protocol with another set of superposition communication terminals 1 during the superposition possible period of the first frame of the transmission signal transmitted from the transmission unit 4 after the communication system is activated.
  • communication information is transmitted from the superimposition communication terminals 101 and 102 that transmit and receive the superimposition signal in accordance with the first protocol during the preliminary interruption period 31 of the first frame of the transmission signal using the common protocol superimposition signal. S1 is sent out. Further, in the preliminary period 32 of the first frame of the transmission signal, the communication information S2 is transmitted from the superimposition communication terminals 111 and 112 that transmit and receive the superimposition signal according to the second protocol using the common protocol superimposition signal. Yes.
  • the period selection unit 17 selects a superimposable period based on the amount of data transmitted and received by each set of superimposed communication terminals 1 using a unique superimposed signal.
  • the period selection unit 17 exchanges communication information including a data amount transmitted and received by each set of superimposed communication terminals 1 using a unique protocol superimposed signal using a common protocol superimposed signal.
  • the superimposable period is selected according to the relative relationship. Specifically, the period selection unit 17 compares the amount of data exchanged between the superimposed communication terminals 101 and 102 with the amount of data exchanged between the superimposed communication terminals 111 and 112, and according to the comparison result. Select the period that can be superimposed.
  • the amount of data exchanged between the superimposed communication terminals 101 and 102 using the superimposed signal of the first protocol is exchanged between the superimposed communication terminals 111 and 112 using the superimposed signal of the second protocol.
  • An example in which the amount is smaller than the data amount is shown.
  • the preliminary interruption period 31 and the preliminary period 32 are assigned to the superimposed signal P2 of the second protocol having a large data amount, and the pause period is assigned to the superimposed signal P1 of the first protocol having a small data amount. Only 37 are allocated.
  • the period selection unit 17 selects a superimposable period to be used for superimposing the superimposed signal so that a relatively long superimposable period is preferentially assigned to the superimposed signal of the protocol with the larger amount of data to be exchanged. To do.
  • the superimposition communication terminal 1 can perform communication using the superimposition signal in a superimposition possible period having a length suitable for the amount of data to be transmitted / received, thereby enabling smooth data transmission as a whole communication system.
  • the period selection unit 17 is configured to select a superimposable period based on the frequency with which each set of superimposed communication terminals 1 performs communication using a unique superimposed signal of a protocol. Also good. That is, the period selection unit 17 exchanges communication information including the frequency with which each set of superimposition communication terminals 1 communicates using a unique protocol superimposition signal using the common protocol superimposition signal. The superimposable period is selected according to the relative relationship. Specifically, the period selection unit 17 compares the frequency at which communication is performed between the superimposed communication terminals 101 and 102 with the frequency at which communication is performed between the superimposed communication terminals 111 and 112, and according to the comparison result. Select the period that can be superimposed.
  • communication using the superimposed signal of the first protocol between the superimposed communication terminals 101 and 102 is performed at 1-minute intervals, and communication using the superimposed signal of the second protocol between the superimposed communication terminals 111 and 112 is performed. Shows an example in which it is performed at intervals of one hour.
  • the superimposition communication terminals 101 and 102 that transmit and receive the superimposition signal according to the first protocol use the superimposition signal of the common protocol.
  • Communication information S1 is transmitted.
  • the communication information S2 is transmitted from the superimposition communication terminals 111 and 112 that transmit and receive the superimposition signal according to the second protocol using the common protocol superimposition signal. Yes.
  • a superimposable period is assigned to the superimposed signal of the first protocol P1, which normally has a high communication frequency, and the superimposed signal P2 of the second protocol is in a certain time zone (here, the fourth frame F4). Only the superimposable period is assigned.
  • the period selection unit 17 selects a superimposable period used for superimposing the superimposition signal so that the superimposable period is preferentially assigned to the superimposition signal of the protocol having the higher communication frequency.
  • the superimposition communication terminal 1 can perform communication using the superimposition signal during the superimposition possible period at a timing suitable for each communication frequency, thereby enabling smooth data transmission as a whole communication system.
  • the period selection unit 17 automatically determines the superimposable period used for superimposition of the superimposed signal based on communication information exchanged by communication between the superimposed communication terminals 1. Therefore, there is an advantage that the user can save the trouble of assigning the superimposable period. In addition, there is an advantage that it is possible to reliably avoid overlapping overlapping periods used between overlapping signals of different protocols.
  • the communication system according to the present embodiment is different from the communication system according to the first embodiment in the method of selecting a period that can be overlapped by the period selection unit 17.
  • the period selection unit 17 makes a use request in communication between the superimposed communication terminals 1, and if this use request is recognized by the period selection unit 17 of another set of superimposed communication terminals 1, the use request is made. Select the period that can be superimposed.
  • the use request referred to here is a command for requesting that one or more subsequent superimposable periods be used for superimposing superimposed signals of protocols specific to each stored in the storage unit 16.
  • the period selection unit 17 uses a superimposed signal of a protocol (hereinafter referred to as a “common protocol”) common to another set of superimposed communication terminals 1 during a period in which a transmission signal can be superimposed.
  • a use request is made by communicating with the period selection unit 17 of the communication terminal 1. That is, the storage unit 16 of the superimposed communication terminal 1 stores a common protocol in addition to a protocol specific to each set of the superimposed communication terminal 1, and the superimposed transmission unit 11 and the superimposed reception unit 12 perform the superimposed signal based on the common protocol. Can be sent and received.
  • the use request R1 is received from the superimposition communication terminal 101 that transmits and receives the superimposition signal according to the first protocol by the superposition signal of the common protocol.
  • the period selection unit 17 of the superimposition communication terminal 101 sets the superimposition possible period in two frames of the next frame (second frame F2) and the next frame (third frame F3) of the first protocol. It is required to be used for superposition of superposition signals.
  • the superposition communication terminals 101 and 102 can superimpose the second and third frames F2 and F3 in FIG. 6 when the use request R1 is accepted by the period selection unit 17 of the other superposition communication terminals 111 and 112. It can be used for the superimposition of the superposition signal P1 of the first protocol.
  • a use request R2 is issued by a superposition signal of the common protocol from the superposition communication terminal 111 that transmits and receives the superposition signal according to the second protocol.
  • the period selection unit 17 of the superimposed communication terminal 111 requests that the superimposable period in the next frame (fifth frame F5) be used for superimposing the superimposed signal of the second protocol.
  • this use request R2 is accepted by the period selection unit 17 of the other pair of superimposed communication terminals 101 and 102, the superimposed communication terminals 111 and 112 occupy the superimposable period of the fifth frame F5 in FIG. It can be used for superposition of the superposition signal P2 of the second protocol.
  • the superimposition communication terminal 1 each time the superimposition communication terminal 1 needs to communicate using a superimposition signal of a unique protocol, it issues a use request in advance and secures the necessary superimposition possible period, and the ensured superimposition is possible. Communication using the superimposed signal is performed during the period. For this reason, which superimposition possible period is assigned to the superimposition signal of which protocol is not fixedly determined but changes at any time during operation of the communication system. As a result, the superimposition communication terminal 1 can perform communication using the superimposition signal during the superimposition possible period suitable for the amount of data to be exchanged and the communication frequency, and the entire communication system can perform smooth data transmission.
  • whether or not the use request made by the period selection unit 17 is accepted is determined according to the following criteria.
  • this use request is a period of another set of superposition communication terminals 1. It is accepted by the selection unit 17. That is, if the superimposable period requested in the use request is already assigned to a superposition signal of a different protocol, the use request is denied (rejected).
  • the plurality of superimposed communication terminals 1 can transmit to the same frame of the transmission signal. Multiple usage requests may be made.
  • the superimposable period during which the use request can be performed is set for each superimposed communication terminal 1 for each period in one frame of the transmission signal. Assigned.
  • a determination criterion is set so that the period selection unit 17 gives priority to the use requests made in advance.
  • FIG. 7 shows an example in which a plurality of usage requests are made in the same frame of the transmission signal, a usage request R1 from the superimposed communication terminal 101, and a usage request R2 from the superimposed communication terminal 111 in the first frame F1 of the transmission signal. Is shown.
  • the period selection unit 17 of the superimposed communication terminal 101 requests that the superimposable period in the next frame (second frame F2) be used for superimposing the superimposed signal of the first protocol.
  • the period selection unit 17 of the superimposition communication terminal 111 requests that the superimposable period in the next frame (second frame F2) be used for superimposition of the superimposition signal of the second protocol.
  • the period selection unit 17 of the superimposition communication terminal 111 sets the second frame (fourth frame F4) and the next frame (fifth frame F5) to be superimposable in the second frame (second frame F5). It is required to be used for superimposition of protocol superimposition signals. Therefore, the superimposition communication terminals 111 and 112 occupy the superimposable period of the fourth and fifth frames F4 and F5 of FIG. 7 and can be used for superimposition of the superimposition signal P2 of the second protocol.
  • the plurality of period selection units 17 when a plurality of period selection units 17 make use requests for the same frame of a transmission signal continuously for a predetermined number of times (for example, twice), the plurality of period selection units 17 (for example, two period selections) Section 17) adopts a configuration in which assignment of superimposable periods during which use requests can be made is switched.
  • the use request R1 from the period selection unit 17 (first period selection unit) of the superimposed communication terminal 101 and the superimposed communication are continuously performed twice in the first and third frames F1 and F3.
  • the superimposable periods assigned by the use request R1 and the use request R2 are switched. That is, in the first and third frames F1 and F3, there is a use request R1 from the superimposed communication terminal 101 in the preliminary interruption period 31, and there is a use request R2 from the superimposed communication terminal 111 in the subsequent preliminary period 32.
  • the use request R1 from the period selection unit 17 (first period selection unit) of the communication terminal 101 is accepted with priority.
  • the period selection unit 17 (first period selection unit) that has made a use request first.
  • the period selection unit 17 (second period selection unit) that has made a use request later gives priority to the superimposable period immediately after the end of communication by the superimposed signal from the superimposed communication terminal 1 for which the use request has been accepted.
  • a usage request is made.
  • the use request R1 from the period selection unit 17 (first period selection unit) of the superimposed communication terminal 101 and the period selection unit 17 (second second) of the superimposed communication terminal 111 are used. Therefore, the use request R1 is accepted with priority, and the use request R2 is rejected. Therefore, the superimposition communication terminals 101 and 102 occupy the superimposable period of the second frame F2, and communicate with the superimposition signal P1 of the first protocol.
  • the superimposition communication terminal 111 for which the use request R2 has been rejected outputs the use request R2 in the third frame F3 immediately after the communication using the superimposition signal P1 of the first protocol by the superimposition communication terminals 101 and 102 is completed.
  • This can be performed with priority over the superimposed communication terminal 101. That is, since the use request from the superimposed communication terminal 101 is prohibited in the third frame F3, the use request R2 from the superimposed communication terminal 111 issued in the preliminary period 32 is preferentially accepted. . Therefore, the superimposition communication terminals 111 and 112 occupy the superimposable period of the fourth and fifth frames F4 and F5 in FIG. 7 and can be used for superimposition of the superimposition signal P2 of the second protocol.
  • a priority is added to the usage request, and when a plurality of usage requests are made for the same frame of the transmission signal, the period selection unit 17 gives priority to the usage requests having the higher priority in order. Judgment criteria may be set so as to accept. For example, when a higher priority is added to the use request from the superimposed communication terminal 101 than the use request from the superimposed communication terminal 111, if there is a use request from both superimposed communication terminals 1 in the same frame of the transmission signal, The use request from the superimposed communication terminal 101 is always accepted with priority.
  • the use request from the superimposed communication terminal 101 is given priority regardless of the order in which the use requests are made. Will be. This configuration is useful when one of the superimposed communication terminals 1 preferentially performs communication using a unique protocol superimposed signal.
  • the communication system in which the superimposed signals of the two types of protocols of the first protocol and the second protocol are mixed is illustrated.
  • the present invention is not limited to this example, and the superimposed signals of three or more types of protocols are used. May be mixed. Even when superposed signals of three or more types of protocols coexist, the occurrence of a communication error can be reduced by selecting the superposable period that the period selecting unit 17 uses for superimposing superposed signals of each protocol.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Communication Control (AREA)
  • Small-Scale Networks (AREA)

Abstract

Selon l'invention, chaque terminal de communications superposées d'un ensemble comportant plusieurs terminaux de communications superposées, comporte une unité de sélection de périodes temporelles servant à sélectionner des périodes temporelles superposables utilisées pour superposer des signaux superposés d'un protocole spécifique stocké dans une unité de stockage de sorte que les périodes temporelles superposables utilisées par les signaux superposés présentant des protocoles différents ne se chevauchent pas. Parmi les signaux de transmission surveillés par une unité de surveillance de signaux, une unité de transmission superposée transmet les signaux superposés de sorte qu'ils soient superposés pendant la période temporelle superposable sélectionnée par l'unité de sélection de périodes temporelles. En d'autres termes, pour un ensemble de terminaux de communications superposées qui envoie et reçoit des signaux superposés selon un premier protocole, et un ensemble de terminaux de communications superposées qui envoie et reçoit des signaux superposés selon un second protocole, différentes périodes temporelles superposables sont utilisées pour envoyer et recevoir des signaux superposés.
PCT/JP2011/074560 2010-10-25 2011-10-25 Système de communications et terminal de communications superposées WO2012057145A1 (fr)

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WO2014199616A1 (fr) * 2013-06-13 2014-12-18 パナソニックＩｐマネジメント株式会社 Système et dispositif de communication
JP7065386B2 (ja) * 2017-10-31 2022-05-12 パナソニックＩｐマネジメント株式会社 通信システム、機器制御システム、通信装置、通信制御方法及びプログラム

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CN103181141B (zh) 2015-08-19
KR101410409B1 (ko) 2014-07-02

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