WO2014125816A1 - 電力線搬送通信端末および検針端末 - Google Patents
電力線搬送通信端末および検針端末 Download PDFInfo
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- WO2014125816A1 WO2014125816A1 PCT/JP2014/000723 JP2014000723W WO2014125816A1 WO 2014125816 A1 WO2014125816 A1 WO 2014125816A1 JP 2014000723 W JP2014000723 W JP 2014000723W WO 2014125816 A1 WO2014125816 A1 WO 2014125816A1
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- power line
- line carrier
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- communication
- carrier communication
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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
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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
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
- H04B2203/5408—Methods of transmitting or receiving signals via power distribution lines using protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
- H04B2203/5433—Remote metering
Definitions
- the present invention is based on G3-PLC, which is a communication protocol for power line carrier communication.
- the present invention relates to a power line carrier communication terminal configured to perform power line carrier communication based on 9903, and a meter reading terminal.
- supply media such as electric power, gas, water, and heat are supplied from consumers to consumers.
- the supply medium consumers use the meter meter to measure the amount of supply medium used, and the supplier confirms the meter reading results with the meter reader and charges the customer for the amount of supply medium used. is doing.
- the meter reading work by the meter reader requires labor costs and there are problems such as erroneous reading of the meter reading value. To solve this kind of problem, the meter reading data is managed without going through the meter reader.
- Various remote meter reading systems have been proposed.
- the remote meter reading system has a slave unit that transmits meter reading data of the supply medium for each customer.
- One master unit is provided for a plurality of slave units, and the master unit acquires meter reading data for each slave unit.
- a host management device managed by a supply medium supplier collects meter-reading data from each of the master units provided for each fixed range in the supply area via a wide-area communication network such as the Internet.
- ITU-T G In conventional power line carrier communication based on 9903, processing when a terminal newly enters the network will be described.
- the child devices 201 and 202 that newly enter the network are arranged with respect to the parent device 101.
- the broken line between the terminals in FIG. 10 shows an unconfigured communication link.
- the child device 202 notifies the MAC layer of a scan request (Scan request) A101 earlier than the child device 201.
- the MAC layer receives the scan request A101, the handset 202 broadcasts a beacon request B101.
- the parent device 101 broadcasts a beacon response (Beacon reply) C101 to the beacon request B101.
- Beacon reply Beacon reply
- mobile_unit 201 is a state which has not entered the network, it does not return the beacon response with respect to beacon request
- mobile_unit 202 notifies the beacon response D101 with respect to an upper layer from a MAC layer, when the beacon response C101 with respect to the beacon request
- the slave unit 201 since the slave unit 201 has not notified the MAC layer of the scan request from the upper layer, it is not in a scanning state. Therefore, even if the subunit
- ITU-T G.1 is performed according to G3-PLC as a power line carrier communication protocol.
- the communication based on 9903 has the following problems.
- a new device entering the network can receive communication routes and communication quality from the parent device and other child devices that have already entered the network. It is necessary to acquire a routing packet including such information. Therefore, the newly entered child device broadcasts a beacon request. The parent device and other child devices that have received this beacon request broadcast a beacon response. Upon receiving a beacon response, a newly entering child device constructs a communication route by transmitting and receiving routing packets including information such as a communication route and communication quality with the transmission source of the beacon response.
- the present invention has been made in view of the above-mentioned reasons, and the object of the present invention is to comply with G3-PLC which is a communication protocol for power line carrier communication.
- An object of the present invention is to provide a power line carrier communication terminal and a meter reading terminal capable of suppressing an increase in communication traffic due to communication for establishing a communication route when new entry is made by performing power line carrier communication complying with 9903 as much as possible.
- the power line carrier communication terminal is based on G3-PLC which is a communication protocol for power line carrier communication.
- the communication unit (1a, 2a) configured to perform power line carrier communication based on 9903 is provided.
- the communication unit (1a, 2a) includes a MAC layer (12, 212) and an upper layer (15, 215).
- the communication unit When the power line carrier communication terminal (23 1 ; 21 2 , 22 2 ) newly enters the network (N1), the communication unit (23 1 2a; 21 2 2a, 22 2 2a) Beacon response (C1, C2; C11, C11) to a beacon request (B1; B11) from at least one power line carrier communication terminal newly entered including the power line carrier communication terminals (23 1 ; 21 2 , 22 2 ) Then, the reception of the beacon response (D1, D2; D11, D12) is notified from the MAC layer (212) to the upper layer (215). In other words, the communication unit notifies the reception of the beacon response from the MAC layer to the upper layer if it receives a beacon response regardless of whether the beacon request is broadcasted or not when it has not entered the network. Configured to do.
- the communication unit (23 1 of 2a; 22 2 of 2a) is configured such that when the power line carrier communication terminal (23 1 ; 22 2 ) of the communication unit newly enters the network (N1), the MAC layer ( When 212) receives the scan request (A1; A11) from the upper layer (215), the beacon request (B1; B11) is broadcasted.
- the communication unit (211 of 21 1 , 2a of 22 1 ; 1a of 1) is used when the power line carrier communication terminal (21 1 , 22 1 ; 1) of the communication unit has already entered the network (N1).
- a beacon request (B1; B11) is received from at least one other newly entered power line carrier communication terminal (23 1 ; 21 2 , 22 2 ), a beacon response (C1, C2; C11) is broadcasted. Configured as follows.
- the power line carrier communication terminal (2) includes a timekeeping unit (2c) configured to time standby times (Tr1, Tr2, Tr3) set at random time lengths.
- the communication unit (2a of 23 1 ; 2a of 22 2 when the power line carrier communication terminal (23 1 ; 22 2 ) of the communication unit newly enters the network (N1), the standby time (Tr3
- the upper layer (215) notifies the MAC layer (212) of the scan request (A1; A11) at the timing when Tr2) elapses.
- the power line carrier communication terminal (21 2 ) when the power line carrier communication terminal (21 2 ) newly enters the network (N1), at least one other power line carrier communication that newly enters during the standby time (Tr1) from the time of startup. If the beacon request (B11) from the terminal (22 2 ) is received, the waiting time (Tr1) is extended.
- the power line carrier communication terminal (21 2 ) increases the extension time (Tr11) of the standby time (Tr1) as the number of beacon requests received during the standby time (Tr1) increases. Configured as follows.
- the power line carrier communication terminal (21 2 ) when the power line carrier communication terminal (21 2 ) newly enters the network (N1), at least one power line carrier communication terminal (22) that newly enters during the standby time (Tr1) from the time of startup. 2 ) If the beacon response (C11) to the beacon request (B11) from 2 ) is received, the waiting time (Tr1) is extended.
- the power line carrier communication terminal (21 2 ) increases the extension time (Tr11) of the standby time (Tr1) as the number of beacon responses received during the standby time (Tr1) increases. Composed.
- the communication unit (22 4 2a) after the power line communication terminal of the communication unit (22 4) has entered the network (N1), the power line communication terminal of the communication unit (22 4) The upper layer (215) further notifies the MAC layer (212) of a scan request (A31) only when a signal (E31) having an identifier different from that of the network (N1) in which the network has entered is detected. Configured.
- the meter-reading terminal (2) of the present invention includes a metering unit (2b) configured to generate meter-reading information representing the amount of use of the supply medium supplied from the supplier by the consumer (30), and power line carrier communication In accordance with G3-PLC, which is a communication protocol of ITU-T G. And a communication unit (2a) configured to transmit the meter-reading information by performing power line carrier communication based on 9903.
- the communication unit (23 1 2a) includes a MAC layer (212) and upper layer (215).
- G3-PLC which is a communication protocol for power line carrier communication
- ITU-T G a communication protocol for power line carrier communication
- the power line carrier communication system includes one master unit 1 and a plurality of slave units 2 (21, 22, 23,%), Each of which is a supply business. It connects with the power line W1 which supplies electric power from a consumer to a consumer.
- the master unit 1 is, for example, a concentrator
- each slave unit 2 is, for example, a meter reading terminal such as a smart meter.
- Each of the master unit 1 and the plurality of slave units 2 is in accordance with G3-PLC, which is a communication protocol for power line carrier communication, in accordance with ITU-T G.1.
- 9 is a power line carrier communication terminal configured to perform power line carrier communication based on 9903.
- the slave unit 2 generates meter reading information representing the usage amount of the supply medium supplied from the supplier by the customer 30 as a meter reading terminal, and in accordance with G3-PLC, the ITU-T G. By performing power line carrier communication based on 9903, the meter reading information is transmitted.
- the master unit 1 and the plurality of slave units 2 constitute a network N1 for performing power line carrier communication with each other via the power line W1.
- the parent device 1 and the plurality of child devices 2 constitute a multi-hop communication network. In this multi-hop communication network, data packets are transmitted from a source node to a destination node via a variable number of relay nodes between them.
- the plurality of slave units 2 (21, 22, 23%) are individually provided to the plurality of consumers 30 (31, 32, 33). That is, the subunit
- mobile_unit 2 is comprised so that meter-reading data may be produced
- One master unit 1 is provided for a plurality of slave units 2.
- the master unit 1 is configured to acquire meter reading data of each of the plurality of slave units 2.
- the base unit 1 includes a communication unit 1a and a control unit 1b.
- the communication unit 1 a has a protocol stack composed of a plurality of layers including a MAC (Media Access Control) layer 12 and an upper layer 15.
- Communication unit 1a is configured to send a packet onto power line W1, detect a packet from power line W1, and receive a packet addressed to base unit 1.
- the control unit 1b is configured to perform transmission / reception control of packets by the communication unit 1a.
- the upper layer 15 of the communication unit 1a is configured to include at least an adaptation layer.
- the MAC layer 12 is a lower sublayer (MAC sublayer) of the data link layer 11 based on IEEE802.15.4, and the data link layer 11 together with the adaptation sublayer 13 which is an upper sublayer of the data link layer 11. Configure.
- the upper layer 15 of the communication unit 1a includes an adaptation sublayer 13 and a layer group 14 (for example, a network layer) higher than the data link layer 11.
- the communication unit 1a transmits a signal (frame) including data obtained from the control unit 1b and provided by the upper layer 15 onto the power line W1, and detects a signal (frame) from the power line W1, If the frame is a frame addressed to the base unit 1, the data included in the frame is provided to the control unit 1 b through the upper layer 15.
- the control unit 1b is configured to perform transmission / reception control of signals by the communication unit 1a and exchange data between the parent device 1 and each child device 2 (each meter reading terminal).
- each of the plurality of slave units 2 includes a communication unit 2a, a measuring unit 2b, a time measuring unit 2c, and a control unit 2d, and corresponds to a meter-reading terminal of the present invention.
- the control unit 2d is configured to exchange data with each of the communication unit 2a, the measuring unit 2b, and the time measuring unit 2c in the slave unit 2 of the control unit 2d. That is, the control unit 2d and each of the communication unit 2a, the measuring unit 2b, and the time measuring unit 2c in each slave unit 2 correspond to each other.
- the communication unit 2 a has a protocol stack including a plurality of layers including a MAC layer 212 and an upper layer 215.
- the communication unit 2a is configured to send a packet onto the power line W1, detect the packet from the power line W1, and receive a packet addressed to the child device 2 of the communication unit 2a.
- the metering unit 2b is configured to generate meter-reading data by metering the amount of power used by the corresponding consumer 30.
- the time measuring unit 2c is configured to perform a time measuring operation for communication control.
- the control unit 2d is configured to perform packet transmission / reception control by the corresponding communication unit 2a, control of meter reading processing by the corresponding measuring unit 2b, control of time measurement processing by the corresponding time measuring unit 2c, and the like.
- the upper layer 215 of the communication unit 2a is configured to include at least an adaptation layer.
- the MAC layer 212 is a lower sublayer of the data link layer 211 and constitutes the data link layer 211 together with the adaptation sublayer 213 that is an upper sublayer of the data link layer 211.
- the upper layer 215 includes an adaptation sublayer 213 and a layer group 214 (for example, a network layer) higher than the data link layer 211.
- the communication unit 2a transmits a signal (frame) including data obtained from the corresponding control unit 2d and provided by the upper layer 215 to the power line W1, and detects a signal (frame) from the power line W1. If the frame is a frame addressed to the child device 2 of the communication unit 2a, the data included in the frame is provided to the corresponding control unit 2d through the upper layer 215.
- the metering unit 2b is configured to generate meter-reading data by reading the amount of power used by the corresponding customer 30 at regular time intervals and providing the meter-reading data to the corresponding control unit 2d.
- the timer unit 2c is configured to provide timer information (for example, timing information) obtained by performing a timing operation for communication control to the corresponding controller 2d (more specifically, the communication unit 2a through the controller 2d). Is done.
- the control unit 2d performs signal transmission / reception control by the corresponding communication unit 2a based on the data obtained from each of the measuring unit 2b and the time measuring unit 2c, so that the slave unit 2 and the master unit 1 of the control unit 2d Configured to exchange data between them.
- a communication route is established between the parent device 1 and each of the child devices 21 (21 1 ) and 22 (22 1 ), and the parent device 1 and the child devices 21 and 22 are one network. N1 has already been configured.
- a solid line between nodes indicates a communication link that has already been established, and a broken line between nodes indicates a communication link that has not been established.
- the slave unit 23 (23 1 ) has not yet established a communication route between the slave unit 23 1 and the master unit 1, and has not yet entered the network N1. If handset 23 1 to new entrants to the network N1, as shown in the communication sequence of FIG. 5, the communication unit 2a of the slave unit 23 1, the scan request to the MAC layer 212 from the upper layer 215 (Scan request) A1 To be notified.
- the communication unit 2a of the slave unit 23 1 MAC layer 212 receives a scan request A1 may beacon request on the power line W1 (Beacon request) B1 and broadcasts.
- the upper layer is not shown.
- the timing unit 2c of each slave unit 2 measures the time from when the slave unit 2 of the timing unit 2C is activated, and determines the timing at which the measured time reaches the standby time from the corresponding communication unit 2a. Configured to provide. In the present embodiment, the timing is provided to the communication unit 2a through the corresponding control unit 2d. In addition, the time measuring unit 2c of each slave unit 2 is configured to provide the corresponding communication unit 2a with a timing at which the time measured from the starting time reaches a randomly set standby time. The communication unit 2a of each slave unit 2 notifies the scan request A1 from the upper layer 215 of the communication unit 2a to the MAC layer 212 at the timing when the time measured by the corresponding time measuring unit 2c reaches the standby time. Composed.
- timing unit 2c of the slave unit 23 1 to new entrants to the network N1 starts from the start of the slave unit 23 1.
- the communication unit 2a of the slave unit 23 1 is a timing when the time measured by the slave unit 23 1 of the clock section 2c reaches the standby time Tr3, scan the MAC layer 212 from the slave unit 23 1 of the upper layer 215 Request A1 is notified.
- child device 23 1 is newcomers to the network N1
- the plurality of handset 2 is newcomers to the network N1
- the plurality of each of the wireless handset 2 e.g.
- each slave unit 2 (for example, the timing unit 2c or the control unit 2d) may be configured to randomly set the length of the standby time for each standby time counting operation.
- the communication units 2a of the slave units 21 1 and 22 1 send beacon responses C1 and C2 to the beacon request B1, respectively. Broadcast transmission is performed on the power line W1.
- the communication unit 2a of the slave unit 23 1 receives the beacon response C1, and notifies the reception D1 beacon response (Beacon reply) to the upper layer 215 from the slave unit 23 1 of the MAC layer 212. Subsequently, the communication unit 2a of the slave unit 23 1 receives the beacon response C2, and notifies the reception D2 beacon responds to the high-level layer 215 from the slave unit 23 1 of the MAC layer 212. Subsequently, the communication unit 2a of the child device 23 1 transmits / receives a routing packet including information such as a communication route and communication quality to each of the child devices 21 1 and 22 1 that are transmission sources of the beacon responses C1 and C2. I do. The communication unit 2a of the child device 23 1 establishes a communication link with at least one of the child devices 21 1 and 22 1 . Thus, handset 23 1 can establish communication route to the base unit 1.
- the communication unit 2a of the slave unit 23 1 receives the beacon response C1, C2, the cost information described in the beacon response C1, C2, and determines the base unit 1 of the entry to the network N1, the base unit Send a Join Request to 1. Subsequently, the communication unit 2a of the slave unit 23 1 receives the Reply is returned from the main unit 1, determines the address to be used, thereafter, by sending a routing packet, performs route construction.
- the communication unit 2a of the slave unit 23 1 transmits a Join Request, it transmits a Join Request to the slave unit that has transmitted the beacon response, and the slave unit that has transmitted the beacon response transmits a route to the master unit 1.
- Join Request is relayed to the main
- slave units 21 (21 2 ) and 22 (22 2 ) are arranged in a network N1 including the master unit 1 and at least one slave unit 2 (not shown).
- a broken line between nodes indicates an unconfigured communication link.
- the communication unit 2a of the slave unit 22 2 receives a scan request A11 is on the power line W1, broadcasts a beacon request (Beacon request) B11.
- the communication unit 1a of the parent device 1 broadcasts a beacon response C11 to the beacon request B11 on the power line W1.
- the slave unit 21 2 is because the state of non-entered the network N1, not reply beacon response to beacon request B11.
- description of the upper layer is abbreviate
- the communication unit 2a of the slave unit 22 when receiving the beacon response C11 for beacon request B11, and notifies the reception D11 beacon responds to the high-level layer 215 from the slave unit 22 2 of the MAC layer 212. Thereafter, the communication unit 2a of the slave unit 22 2, between the master unit 1 and slave unit 22 2 which is the sender of the beacon response C11, communication routes, the transmission and reception of routing packets containing information such as communication quality performed Thus, a communication route can be constructed.
- the communication unit 2a of the slave unit 22 after entry into the network by sending a Join Request to the base unit 1 which is the transmission source of the beacon response C11, by exchanging routing packets, construction and maintenance of routes I do.
- the communication unit 2a of the slave unit 21 since the upper layer 215 of the cordless handset 21 2 does not notify the scan request to the MAC layer 212, not in the state during the scan. Therefore, ITU-T G.I. With strict application of 9903, the communication unit 2a of the slave unit 21 2, it receives a beacon response C11, does not notify the reception of the beacon response to the upper layer 215 from the slave unit 21 2 of the MAC layer 212.
- a beacon response (a beacon response triggered by another slave unit 2) to a beacon request transmitted by another slave unit 2 that has newly entered is used.
- the MAC layer 212 of the child device 2 is configured to notify the upper layer 215 of reception of a beacon response. That is, the slave unit 2 notifies the reception of the beacon response from the MAC layer 212 to the upper layer 215 when receiving the beacon response not only during the scanning but also during the scanning.
- the communication unit 2a of the slave unit 21 2 receives the beacon response C11 for beacon request B11, and notifies the reception D12 beacon responds to the high-level layer 215 from the slave unit 21 2 of the MAC layer 212 .
- each communication unit 2a has at least one new entry including the slave unit 2 of the communication unit 2a when the slave unit 2 of the communication unit 2a newly enters the network N1. If a beacon response to the beacon request from the slave unit 2 is received, the MAC layer 212 of the communication unit 2a is configured to notify the upper layer 215 of the reception of the beacon response.
- the communication unit 2a of the slave unit 21 2 is to build a communication link with the base unit 1 which is the transmission source of the beacon response C11, it is possible to construct a communication route to the base unit 1. That is, the communication unit 2a of the slave unit 21 2, when new entrants to the network N1, for slave unit 21 2 without transmitting a beacon request, beacon request B11 to another handset 22 2 to new entrants sent using a beacon response C11, it is possible to construct a communication route between the slave unit 21 2 and the base unit 1. Therefore, each slave unit 2 is in accordance with G3-PLC, which is a communication protocol for power line carrier communication, in accordance with ITU-T G. By performing power line carrier communication that complies with 9903 as much as possible, it is possible to suppress an increase in communication traffic due to communication for establishing a communication route when a plurality of slave units 2 newly enter the network N1.
- G3-PLC is a communication protocol for power line carrier communication
- the handset 2 of the present embodiment is an ITU-T G. It is intended to suppress an increase in communication traffic when a plurality of slave units 2 newly enter the network N1 by performing power line carrier communication that complies with 9903 as much as possible. That is, when the handset 2 (21 2 ) newly entering the network N1 receives the beacon response C11 triggered by the other handset 2 (22 2 ) newly entering the network N1, Even when the slave unit 2 (21 2 ) is not in a scanning state, the MAC layer 212 of the slave unit 2 (21 2 ) notifies the upper layer 215 that a beacon response has been received. Different from 9903.
- the communication unit 2a of the slave unit 21 using a beacon response C11, when it is not possible to construct a communication route between the slave unit 21 2 and the base unit 1, the slave unit 21 2 at the timing when the time measured by the timer unit 2c has reached the waiting time Tr1, will notify the scanning request to the MAC layer 212 from the upper layer 215 of the slave unit 21 2.
- the communication unit 2a of the slave unit 21 like the handset 22 2, beacon request, by sending and receiving beacons response, to construct a communication route to the base unit 1.
- the slave unit 2 receives a beacon request broadcast by at least one other slave unit 2 that newly enters during the standby time from when the slave unit 2 is activated.
- the waiting time is extended by a predetermined time.
- handset 212 during the standby time Tr1 from the start of the slave unit 21 2, since receiving a beacon request B11 slave unit 22 2 to new entrants sends broadcast the waiting time Tr1 The time is extended by a predetermined time (extended time Tr11).
- the communication unit 2a of the slave unit 21 2 is in extended waiting time (Tr1 + Tr11), the probability of receiving a beacon response to trigger other handset 2 is increased. Therefore, without handset 21 2 transmits a beacon request, it may be able to construct a communication route between the cordless handset 21 2 and base unit 1 becomes higher.
- mobile_unit 2 (for example, the time measuring part 2c or the control part 2d) is comprised so that extension time may be lengthened, so that there are many beacon requests received during standby
- handset 21 2 the more the number of beacons requests received during the waiting time Tr1 is, a longer extension time Tr11.
- the communication unit 2a of the slave unit 21 2 the larger the number of the received beacon request, the probability of receiving a beacon response to trigger other handset 2 to new entrants are even higher. Therefore, the communication unit 2a of the slave unit 21 2, without handset 21 2 transmits a beacon request, even more likely to be able to build a communication route between the cordless handset 21 2 and base unit 1 Become.
- the slave unit 21 2 (for example, the communication unit 2a or the control unit 2d) establishes a communication route when a plurality of slave units 2 newly enter the network N1 by extending the standby time Tr1. The increase in communication traffic due to the communication can be further suppressed.
- the communication unit 2a of the child device 2 establishes a communication route between the child device 2 and the parent device 1 and enters the network N1, and then the upper layer 215 of the child device 2 sends a scan request to the MAC layer 212. It is configured to periodically broadcast a beacon request by further notification periodically.
- mobile_unit 2 can update a communication route according to the change of communication environment. For example, as shown in FIG. 8, the communication unit 2a of the slave unit 22 3, after entering the network N1, the scan request for every predetermined time Ta, the MAC layer 212 from the upper layer 215 of the handset 22 3 A21 To be notified.
- the communication unit 2a of the slave unit 22 3 MAC layer 212 receives a scan request A21 is on the power line W1, broadcasts a beacon request B21 every predetermined time Ta.
- a scan request A21 is on the power line W1, broadcasts a beacon request B21 every predetermined time Ta.
- mobile_unit 21 and 23 of FIG. 8 description of the upper layer is abbreviate
- the communication unit 2a of the child device 2 constructs a communication route between the child device 2 and the parent device 1, enters the network N1, and then enters the network N1 into which the child device 2 has entered.
- the upper layer 215 is configured to further notify the MAC layer 212 of a scan request only when a signal with an identifier (network ID) different from is detected.
- network ID network ID
- the communication unit 2a of the slave unit 22 after entering the first network N1, a different second of the first network N1 which slave unit 22 4 is entered
- the sub-terminal 3 of network N2 detects a scan request E31 that transmitted broadband, notifies the Sync-Loss.indication indicated by F31 from the MAC layer 212 of the handset 22 4 to the upper layer 215.
- Sync-Loss of MAC layer 212 of the slave unit 22 4 is indicated by F31 .indication is notified to the upper layer 215.
- the upper layer 215 of the handset 22 4 notifies a scan request A31 to the MAC layer 212, the communication unit 2a of the slave unit 22 4, on the power line W1, it broadcasts a beacon request B31.
- mobile_unit 21, 23, and 3 of FIG. 9 description of the upper layer is abbreviate
- each of the communication unit 1a of the parent device 1 and the communication units 2a of the plurality of child devices 2 calculates a communication quality value associated with the received signal strength of the received beacon request (see B1 and B11), Data of the calculated communication quality value is configured to be added to the beacon response (see C1 and C11).
- the communication unit 2a of the handset 2 that has received the beacon response (C1 and C11) to which the data of the communication quality value is added can determine the communication quality of the communication link with the transmission source of the beacon response.
- a communication route with good communication quality can be constructed.
- mobile_unit 2 may be comprised so that the information of the calculated communication quality value may be added to the following beacon request
- the communication unit 1a of the parent device 1 or the communication unit 2a of the child device 2 that has received the beacon request with the communication quality value data added can determine the communication quality of the communication link with the transmission source of the beacon request. Therefore, a communication route with good communication quality can be constructed.
- the communication quality value described above is associated with the received signal strength. However, instead of the received signal strength, the communication quality value is associated with other factors such as an SN ratio, EVM (Error Vector Magnitude), bit error rate, and packet error rate. It may be calculated.
- EVM Error Vector Magnitude
- bit error rate bit error rate
- packet error rate packet error rate
- the slave unit 2 when newly entering the network N1, receives a beacon request from at least one newly entered slave unit 2 during the standby period from the time of startup. If the beacon response is received, the waiting time is extended. For example, in the communication sequence of FIG. 7, handset 21 2 (e.g., the communication unit 2a or the control unit 2d), while the standby time Tr1 from the start, a beacon response to trigger other handset 22 2 to new entrants If C11 is received, the standby time Tr1 is extended by a predetermined time (extended time Tr11).
- the communication unit 2a of the slave unit 21 2 is in extended waiting time (Tr1 + Tr11), the probability of receiving a beacon response to further trigger another handset 2 for new entrants increases. Further, without handset 21 2 transmits a beacon request, it may be able to construct a communication route between the cordless handset 21 2 and base unit 1 becomes higher.
- mobile_unit 2 may be comprised so that the extension time of standby time may be lengthened, so that there are many beacon responses received during standby time.
- the slave unit 21 2 (for example, the communication unit 2a or the control unit 2d) increases the extension time Tr11 as the number of beacon responses received during the standby time Tr1 increases.
- the communication unit 2a of the slave unit 21 2 the more the number of the received beacon response is large, the probability of receiving a beacon response to trigger other handset 2 to new entrants are even higher. Therefore, the communication unit 2a of the slave unit 21 2, without handset 21 2 transmits a beacon request, even more likely to be able to build a communication route between the cordless handset 21 2 and base unit 1 Become.
- the slave unit 21 2 (for example, the communication unit 2a or the control unit 2d) establishes a communication route when a plurality of slave units 2 newly enter the network N1 by extending the standby time Tr1. The increase in communication traffic due to the communication can be further suppressed.
- power is illustrated as a supply medium to be used for meter reading.
- the supply medium to be used for meter reading may be gas, water, heat, or the like other than power. Good.
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- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Small-Scale Networks (AREA)
Abstract
Description
Claims (10)
- 電力線搬送通信の通信プロトコルであるG3-PLCに従って、ITU-T G.9903に基づく電力線搬送通信を行うように構成される通信部を備える電力線搬送通信端末であって、
前記通信部は、MAC層および上位層を含み、
前記通信部は、当該電力線搬送通信端末がネットワークに新規参入する時に、当該通信部の電力線搬送通信端末を含む新規参入する少なくとも1つの電力線搬送通信端末からのビーコン要求に対するビーコン応答を受信すれば、前記MAC層から前記上位層へ前記ビーコン応答の受信を通知するように構成される
ことを特徴とする電力線搬送通信端末。 - 前記通信部は、
当該通信部の電力線搬送通信端末がネットワークに新規参入する時に前記MAC層が前記上位層からスキャン要求を受けた場合、ビーコン要求をブロードキャスト送信し、
当該通信部の電力線搬送通信端末がネットワークに参入済である時に、新規参入する少なくとも1つの他の電力線搬送通信端末からのビーコン要求を受信した場合、ビーコン応答をブロードキャスト送信する
ように構成されることを特徴とする請求項1記載の電力線搬送通信端末。 - 時間長さをランダムに設定した待機時間を計時するように構成される計時部をさらに備え、
前記通信部は、当該通信部の電力線搬送通信端末がネットワークに新規参入する時に、起動時から前記待機時間が経過したタイミングで、前記上位層が前記スキャン要求を前記MAC層に通知するように構成される
ことを特徴とする請求項2記載の電力線搬送通信端末。 - ネットワークに新規参入する時に、起動時から前記待機時間の間に、前記新規参入する少なくとも1つの他の電力線搬送通信端末からのビーコン要求を受信すれば、前記待機時間を延長するように構成されることを特徴とする請求項3記載の電力線搬送通信端末。
- 前記待機時間の間に受信したビーコン要求の数が多いほど、前記待機時間の延長時間をより長くするように構成されることを特徴とする請求項4記載の通信端末。
- ネットワークに新規参入する時に、起動時から前記待機時間の間に、前記新規参入する少なくとも1つの電力線搬送通信端末からのビーコン要求に対するビーコン応答を受信すれば、前記待機時間を延長するように構成されることを特徴とする請求項3記載の電力線搬送通信端末。
- 前記待機時間の間に受信したビーコン応答の数が多いほど、前記待機時間の延長時間をより長くするように構成されることを特徴とする請求項6記載の電力線搬送通信端末。
- 前記通信部は、当該通信部の電力線搬送通信端末がネットワークに参入した後、前記上位層がスキャン要求を前記MAC層に定期的にさらに通知するように構成されることを特徴とする請求項1乃至7いずれか記載の電力線搬送通信端末。
- 前記通信部は、当該通信部の電力線搬送通信端末がネットワークに参入した後、当該通信部の電力線搬送通信端末が参入している前記ネットワークとは異なる識別子の信号を検出したときにのみ、前記上位層がスキャン要求を前記MAC層にさらに通知するように構成されることを特徴とする請求項1乃至7いずれか記載の電力線搬送通信端末。
- 供給事業者から供給される供給媒体の需要家における使用量を表す検針情報を生成するように構成される計量部と、
電力線搬送通信の通信プロトコルであるG3-PLCに従って、ITU-T G.9903に基づく電力線搬送通信を行うことによって、前記検針情報を送信するように構成される通信部と
を備える検針端末であって、
前記通信部は、MAC層および上位層を含み、
前記通信部は、当該検針端末がネットワークに新規参入する時に、当該通信部の検針端末を含む新規参入する少なくとも1つの検針端末からのビーコン要求に対するビーコン応答を受信すれば、前記MAC層から前記上位層へ前記ビーコン応答の受信を通知するように構成される
ことを特徴とする検針端末。
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JP2016100754A (ja) * | 2014-11-21 | 2016-05-30 | ローム株式会社 | 電力線通信装置 |
WO2018025602A1 (ja) * | 2016-08-03 | 2018-02-08 | パナソニックIpマネジメント株式会社 | 通信装置、通信システム、通信制御方法、及びプログラム |
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CN106603122A (zh) * | 2016-11-07 | 2017-04-26 | 歌尔丹拿音响有限公司 | 基于电力线的音频传输装置和系统、组网方法 |
CN110995316B (zh) * | 2019-11-27 | 2022-02-11 | 深圳市力合微电子股份有限公司 | 一种高速电力线载波网络通讯的路由方法 |
CN110995315B (zh) * | 2019-11-27 | 2022-02-11 | 深圳市力合微电子股份有限公司 | 一种基于高速电力线载波的通信方法 |
CN112468187B (zh) * | 2020-12-10 | 2022-06-07 | 磐基技术有限公司 | 一种电力载波通信设备的自组网方法 |
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WO2018025602A1 (ja) * | 2016-08-03 | 2018-02-08 | パナソニックIpマネジメント株式会社 | 通信装置、通信システム、通信制御方法、及びプログラム |
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