WO2023157109A1 - アドレス設定装置、アドレス設定方法、および、アドレス設定プログラム - Google Patents
アドレス設定装置、アドレス設定方法、および、アドレス設定プログラム Download PDFInfo
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- WO2023157109A1 WO2023157109A1 PCT/JP2022/006080 JP2022006080W WO2023157109A1 WO 2023157109 A1 WO2023157109 A1 WO 2023157109A1 JP 2022006080 W JP2022006080 W JP 2022006080W WO 2023157109 A1 WO2023157109 A1 WO 2023157109A1
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- 238000000034 method Methods 0.000 title claims description 31
- 238000005259 measurement Methods 0.000 claims abstract description 155
- 238000004891 communication Methods 0.000 claims abstract description 142
- 239000000284 extract Substances 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 claims description 36
- 230000004044 response Effects 0.000 claims description 29
- 230000005540 biological transmission Effects 0.000 claims description 26
- 238000012545 processing Methods 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 31
- 230000006870 function Effects 0.000 description 17
- 238000004378 air conditioning Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 101100172132 Mus musculus Eif3a gene Proteins 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5046—Resolving address allocation conflicts; Testing of addresses
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/14—Network analysis or design
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/10—Mapping addresses of different types
- H04L61/103—Mapping addresses of different types across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5038—Address allocation for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
Definitions
- the present disclosure relates to an address setting device, an address setting method, and an address setting program.
- Equipment in facilities such as buildings is connected to a communication control equipment network for remote control of the equipment.
- a facility network may use a bus-type network connected by a multi-drop (transition wiring) cable for workability.
- Some of such equipment do not have an address set in advance to be used for communication. Therefore, address setting is performed manually using a device such as a DIP switch.
- DIP is an abbreviation for Dual In-line Package.
- random address setting using random values is known as a method of automating address setting.
- a fixed address is not necessarily set to the child station depending on the timing of the address setting request from the child station. If a fixed address is not set for the slave station, there is a problem that when the master station performs individual communication with the slave station, it cannot communicate with any slave station. Therefore, in the address setting of the child station, a method is required in which a fixed address is automatically set to the child station.
- Patent Document 1 describes an address setting method for automating address setting in a serial bus network consisting of an air conditioner outdoor unit serving as a master station and a plurality of air conditioning indoor units serving as slave stations.
- this address setting method by changing at least one of the amplitude and frequency of the signal transmitted by the air conditioner outdoor unit, the distance reached by the signal on the communication line is adjusted to search for the air conditioner indoor unit.
- the connection order on the communication lines of the plurality of air conditioning indoor units is determined, and the relationship between the connection order and the addresses is associated to automate the address setting.
- the address setting method of Patent Document 1 does not consider branching of communication lines.
- the address setting method of Patent Document 1 when there are multiple air conditioner indoor units with the same distance from the air conditioner outdoor unit in network wiring with branches, there is a problem that the air conditioner indoor unit cannot be uniquely specified. .
- the purpose of this disclosure is to automatically assign addresses to child stations that are equidistant from each other as designed in a communication network consisting of a master station and a plurality of slave stations.
- An address setting device is an address setting device provided in a master station included in a communication network in which a master station and a plurality of slave stations are connected by communication lines, Obtaining a temporary address of each child station of the plurality of child stations and a distance measurement result obtained by measuring a distance between the parent station and each child station, and acquiring the temporary address of each child station, the parent station and each child station a temporary address setting unit for registering the distance measurement result with the temporary address table; Based on the result of distance measurement between the parent station and each child station, a plurality of child stations having the same distance from the parent station are extracted as equidistant child stations.
- a request is made to measure the distance to the station, the result of measuring the distance between each of the equidistant child stations and the adjacent child station is acquired as an adjacent distance result, and the temporary address of the equidistant child station and the equidistant child station are obtained.
- a duplicate address detection unit for registering in the temporary address table a result of the adjacent distance between each child station and an adjacent child station; analyzing a connection configuration between the parent station and each child station in the communication network based on the temporary address table, and using address information in which a child station address to be set to the child station specified from the connection configuration is registered; and a child station address setting unit for setting a child station address to the temporary address of each child station.
- addresses can be set as designed for a plurality of slave stations that are equidistant between the master station and the slave stations. It has the effect of being able to
- FIG. 1 is a diagram showing a configuration example of a communication network according to Embodiment 1;
- FIG. 2 is a diagram showing a configuration example of a communication station according to Embodiment 1;
- FIG. 4 is a diagram showing a configuration example of address information according to the first embodiment;
- FIG. 4 is a diagram showing a configuration example of a temporary address table according to the first embodiment;
- FIG. 4 is a sequence diagram showing operation of address setting processing in the communication network according to the first embodiment;
- FIG. 4 is a sequence diagram showing operation of address setting processing in the communication network according to the first embodiment;
- FIG. FIG. 4 is a diagram showing a setting example of a temporary address table according to the first embodiment;
- FIG. 4 is a diagram showing a setting example of a temporary address table according to the first embodiment;
- FIG. FIG. 4 is a diagram showing a setting example of a temporary address table according to the first embodiment;
- FIG. 1 is a diagram showing a configuration example of an address setting device according to Embodiment 1;
- FIG. FIG. 4 shows another example of the configuration of the address setting device according to the first embodiment;
- FIG. 11 is a sequence diagram showing operation of address setting processing in the communication network according to the second embodiment;
- FIG. 11 is a sequence diagram showing operation of address setting processing in the communication network according to the second embodiment;
- FIG. 11 is a diagram showing a configuration example of a communication network according to Embodiment 3;
- FIG. 11 is a diagram showing a configuration example of address information according to the third embodiment;
- FIG. FIG. 11 is a sequence diagram showing operation of address setting processing in the communication network according to the third embodiment;
- FIG. 11 is a sequence diagram showing operation of address setting processing in the communication network according
- FIG. 1 is a diagram showing a configuration example of a communication network 500 according to this embodiment.
- a communication network 500 is a communication system to which a plurality of communication stations 100 are connected.
- a master station 101 and a plurality of slave stations 102 are connected to a communication network 500 via communication lines 103 .
- a master station 101 and a plurality of slave stations 102 are connected to a bus network.
- the communication network 500 is a facility network used in facilities such as buildings or factories.
- equipment network equipment such as air conditioning indoor units and air conditioning outdoor units are connected to a communication control network for remotely controlling these equipment.
- Communication network 500 is a bus-type network connected by multi-drop cables.
- each child station has a unique temporary address for identifying itself.
- each slave station has a MAC address in Ethernet (registered trademark) as a temporary address.
- the communication station 100 when the communication station 100 is described, it may refer to the master station 101, the child station 102, or the master station 101 and the child station 102.
- the configuration of the communication network 500 can be changed as appropriate. For example, it is possible to connect 3 or less slave stations or 5 or more slave stations.
- FIG. 2 is a diagram showing a configuration example of communication station 100 according to the present embodiment.
- the communication station 100 has a control section 130 , a communication circuit 120 , a distance measurement circuit 110 and an address setting device 140 .
- the address setting device 140 has a temporary address setting section 141 , a child station address setting section 142 , a duplicate address detection section 143 , a storage section 144 and a physical switch 145 .
- Physical switch 145 is, for example, a DIP switch. Also, depending on the role of each station, the address setting device 140 may not use some of its functions.
- the control unit 130 is configured by, for example, a CPU or an MPU.
- CPU is an abbreviation for Central Processing Unit.
- MPU is an abbreviation for Micro Processing Unit.
- the control unit 130 has an arithmetic unit, a storage unit, and various inputs/outputs.
- the storage unit includes a nonvolatile memory and a volatile memory, and the nonvolatile memory stores a program for controlling equipment.
- a control unit configured by a CPU or the like controls equipment and communication of its own station.
- an air conditioning system can be configured by connecting a fan or a compressor to the control unit of the master station and connecting and controlling a louver or the like to the control unit of the slave station.
- the communication circuit 120 can be connected to a communication line and perform data communication by the control unit.
- the communication circuit 120 has a collision avoidance algorithm so that communication data collision does not occur on the communication line.
- CSMA/CD is an abbreviation for Carrier Sense Multiple Access/Collision Detection.
- communication circuitry 120 allows eavesdropping on communications.
- the distance measurement circuit 110 can measure the distance to each station connected by the communication line 103 by any method.
- the distance measurement circuit 110 can derive the distance by measuring the communication delay time between the parent station and the child station to be distance-measured.
- the address setting device 140 is composed of a temporary address setting section 141 , a child station address setting section 142 , a duplicate address detection section 143 , a storage section 144 and a physical switch 145 .
- the storage unit 144 of the address setting device 140 has a nonvolatile memory and a volatile memory.
- FIG. 3 is a diagram showing a configuration example of the address information 31 according to this embodiment.
- the master station stores the address information 31 in the storage unit 144 .
- the storage unit 144 may acquire the address information 31 from the outside by a management station connected by the communication line 103 and store the acquired address information 31 .
- the address information 31 registers a child station address to be set to a child station specified from the connection configuration between the parent station and each child station in the communication network 500 .
- the address information 31 registers the relationship of adjacency, the distance between adjacent stations, the set value of the physical switch, the slave station address, and the installation location information.
- the adjacency relation indicates the adjacency relation between the adjacency source and the adjacency destination.
- An adjacency relationship represents a connection relationship in communication network 500 .
- the adjacent station distance is the distance between each station.
- the slave station address is an address to be set in the slave station.
- the setting value of the physical switch is, for example, the setting value of the DIP switch.
- the installation location information is information on the location where the slave station is installed.
- FIG. 4 is a diagram showing a configuration example of the temporary address table 32 according to this embodiment.
- the master station stores in the storage unit 144 a temporary address table 32 for registering information such as temporary addresses and distance measurement results of slave stations.
- the temporary address table 32 In the temporary address table 32 are registered adjacency relationships consisting of measurement source temporary addresses and measurement destination temporary addresses, distance measurement results, physical switch setting values, and child station addresses.
- the adjacency relation the adjacency relation between the measurement source temporary address and the measurement destination temporary address is registered.
- An adjacency relationship represents a connection relationship in communication network 500 .
- the distance measurement result the result of measuring the distance between each station is registered. For example, a value set in a DIP switch is registered as the setting value of the physical switch.
- the slave station address the address finally set to the slave station is registered.
- addresses that do not overlap on the communication network are used for the temporary address and address of the master station.
- an address such as #0 is used for the master station.
- the storage unit 144 of the child station does not necessarily need to hold the address information 31 or the temporary address table 32, and may separately hold the temporary address (such as MAC address) of the own station or the address of the own child station.
- a temporary address setting unit 141 of the address setting device 140 can set a temporary address using a method such as a random number in response to a request from the control unit 130 or another station.
- a slave station address setting unit 142 of the address setting device 140 determines a slave station address to be set in response to a request from the control unit 130 or another station, and performs slave station address setting processing.
- the duplicated address detection unit 143 of the address setting device 140 detects duplicated addresses from, for example, the content of the intercepted communication.
- the physical switch 145 of the address setting device 140 can set a value of 1 bit or more depending on whether the switch is turned on or off, and is referred to as necessary.
- the address setting device 140 may have different roles in the master station and the slave station, and can selectively use necessary functions according to commands from the control unit 130 .
- the operation procedure of each station in communication network 500 corresponds to the address setting method.
- a program that realizes the operation of each station in communication network 500 corresponds to an address setting program.
- FIG. 5 and 6 are sequence diagrams showing the operation of address setting processing in communication network 500 according to the present embodiment.
- FIG. 6 shows a sequence following the sequence of FIG.
- each child station has a temporary address (#(n) in FIGS. 5 and 6, where n is a positive integer) and a child station address (#m in FIGS. 5 and 6, where m is a positive integer). integer).
- the slave station address is not set at the beginning.
- the distance between each station is 1 m
- the distance between the parent station and each child station is the sum of the distances between the stations that have passed through.
- the distance between the master station and slave station 4 is 2 m.
- the DIP switch of slave station 4 is set to 1, and the other slave stations are set to 0.
- the temporary address setting unit 141 of the parent station acquires the temporary address of each child station of a plurality of child stations and the distance measurement result of measuring the distance between the parent station and each child station.
- the temporary address setting unit 141 of the parent station registers the temporary address of each child station and the distance measurement result between the parent station and each child station in the temporary address table 32 .
- the temporary address setting unit 141 of the parent station transmits a temporary address transmission request requesting transmission of a temporary address to each child station of a plurality of child stations.
- the temporary address setting unit 141 of the parent station receives the temporary address of each of the plurality of child stations as a response to the temporary address transmission request. Specifically, it is as follows.
- step S ⁇ b>101 the temporary address setting unit 141 of the master station initializes the temporary address table 32 held in the storage unit 144 . Then, in step S102, the temporary address setting unit 141 of the parent station broadcasts a temporary address transmission request to the child stations.
- step S103 when the slave station receives the temporary address transmission request, it transmits a temporary address transmission request response including its own temporary address to the master station. At this time, if a value is set in the physical switch 145 of the slave station, the slave station may include the value in the temporary address transmission request response and transmit it to the master station.
- step S104 the temporary address setting unit 141 of the parent station receives the temporary address transmission request response from the child station, and registers the temporary address of the child station included in the temporary address transmission request response in the temporary address table 32. Also, if the temporary address transmission request response contains a value set in the physical switch, the temporary address setting unit 141 of the master station also registers the value in the temporary address table 32 .
- step S ⁇ b>105 the temporary address setting unit 141 of the parent station measures the distance to the temporary address of the slave station registered in the temporary address table 32 . Specifically, the parent station transmits a distance measurement frame to the temporary address of the child station in the temporary address table 32 . In step S106, the slave station transmits the distance to the master station as a distance measurement frame response. In step S107, the parent station registers the distance measurement result, which is the distance to each child station obtained from the distance measurement frame response, in the temporary address table 32 as information associated with the temporary address of the child station.
- FIG. 7 is a diagram showing a setting example of the temporary address table 32 according to this embodiment.
- FIG. 7 shows the temporary address table 32 reflecting the distance measurement result of measuring the distance from the parent station to the child station.
- Duplicate address detection unit 143 of the parent station extracts a plurality of child stations having equal distances from the parent station as equidistant child stations 104 based on the distance measurement result between the parent station and each child station.
- Duplicate address detection unit 143 of the master station requests each equidistant slave station 104 to measure the distance to an adjacent slave station (adjacent station measurement request).
- Duplicate address detection section 143 of the parent station acquires the result of measuring the distance between each equidistant child station 104 and the adjacent child station as a distance measurement result (neighboring distance result).
- Duplicate address detection unit 143 of parent station registers temporary address of equidistant child station 104 and distance measurement result (neighboring distance result) between each of equidistant child station 104 and an adjacent child station in temporary address table 32. do. Specifically, it is as follows.
- step S108 after the duplicate address detection unit 143 of the master station has completed the distance measurement between all the temporary addresses in the temporary address table 32 and the slave stations, the master station registered in the temporary address table 32 and the slave station Check the distance between stations. Duplicate address detection unit 143 of the parent station checks whether the distance measurement result obtained from the adjacent station distance set in address information 31 in FIG. 3 matches.
- the slave station 2 (#(3)) and the slave station 4 (#(1)) are equidistant slave stations 104 equidistant from the master station.
- Duplicate address detector 143 of the master station recognizes that there are two slave stations having the same distance measurement result. That is, the equidistant slave stations 104 are the slave station 2 and the slave station 4 .
- step S109 the duplicate address detection unit 143 of the parent station checks which child station the child station 2 and the child station 4 are adjacent to from the distance measurement result.
- a neighboring station measurement request is sent including the temporary address of the slave station.
- step S110 the slave station that has received the adjacent station measurement request measures the distance between each slave station based on the temporary address of the slave station to be measured.
- step S111 when the child station that has received the adjacent station measurement request completes the collection of all the temporary addresses of the child stations to be measured, it transmits the measurement result to the master station as an adjacent station measurement request response.
- the duplicate address detector 143 of the master station registers the content of the adjacent station measurement request response in the temporary address table 32 .
- FIG. 8 and 9 are diagrams showing setting examples of the temporary address table 32 according to the present embodiment.
- FIG. 8 shows the temporary address table 32 reflecting the result of measuring the distance from the slave station 4 (#(1)) to another slave station.
- FIG. 9 shows the temporary address table 32 reflecting the result of measuring the distance from the slave station 2 (#(3)) to another slave station.
- the slave station address setting unit 142 of the master station analyzes the connection configuration between the master station and each slave station in the communication network 500 based on the temporary address table 32 .
- the slave station address setting unit 142 assigns slave station set the address.
- the child station address setting unit 142 of the parent station may acquire from each child station, as setting information, a value set in a physical switch included in each child station.
- the child station address setting unit 142 of the parent station sets the child station address to the temporary address of the child station specified from the acquired setting information and connection configuration. Specifically, it is as follows.
- step S112 the slave station address setting unit 142 of the master station sets the received adjacency distance result, the distance measurement result between the master station and the slave station, and the temporary address in which the value set in the physical switch is set. Based on the table 32, the adjacency relationship of the communication network 500 is analyzed as the connection relationship.
- the distance between the slave stations 2 and 3 is 1 m according to FIG. Also, according to FIG. 8, the distance from the slave station 4 to the slave station 3 is 3 m.
- the slave station address setting unit 142 of the master station can grasp the configuration of the communication network 500 from such characteristic distance measurement results. Alternatively, since the value set in the physical switch of the slave station 4 is 1 and the value set in the physical switch of the slave station 2 is 0, the slave stations 2 and 4 can be identified. is possible. Therefore, the child station address setting unit 142 of the parent station compares the adjacency relationship of the address information 31 of FIG. 3 with the adjacency relationship shown in the temporary address table 32 of FIGS. A child station address corresponding to the address can be associated.
- step S113 the child station address setting unit 142 of the parent station transmits an address setting request including the child station address corresponding to the temporary address of the child station to the child station.
- slave station address #1 is set for slave station 1 (temporary address #(4)).
- Slave station address #2 is set for slave station 2 (temporary address #(3)).
- Slave station address #3 is set for slave station 3 (temporary address #(2)).
- Slave station address #4 is set for slave station 4 (temporary address #(1)).
- the above address setting process can be started again when a new slave station is connected to the communication network 500 in which the address setting is completed and control communication is being performed.
- each station of the parent station and a plurality of child stations has a distance measurement circuit for measuring the distance to each other.
- the parent station has a temporary address table that stores temporary addresses used to identify the child stations. The parent station collects the temporary addresses of the child stations, measures the distance to the child stations having the temporary addresses, associates the temporary addresses with the distance measurement results, and stores them in a temporary address table. As the temporary address table to be finally saved, only the temporary address table of FIG. 7 to which the finally set slave station address is added may be saved. Alternatively, all temporary address tables of FIGS. 7 to 9 including individual measurement results such as the temporary address tables of FIGS. 8 and 9 may be stored.
- the master station instructs each slave station to measure the distance between slave stations, and collects the distance measurement results measured by each station. Then, the master station identifies the network configuration of the communication system from the distance measurement result, associates the slave station address to be set to the slave station with the slave station in the identified network configuration, and sets the slave station address to be set to the slave station. set.
- the slave station has a physical switch, reads the setting information of the physical switch, and transmits it to the master station.
- the master station identifies the slave station by combining the setting information of the physical switch and the distance measurement result.
- step S109 the duplicate address detection unit of the master station checks which slave station each of the slave stations 2 and 4 is adjacent to based on the distance measurement result.
- the temporary address of the slave station is included in the neighboring station measurement request and transmitted.
- a mode of using the temporary address list when including the temporary addresses of the slave stations to be measured in the adjacent station measurement request will be described.
- the master station holds the distance measurement results and temporary addresses measured by each slave station as a temporary address table.
- the master station detects an equidistant slave station whose distance between the master station and the slave station is equidistant in the temporary address table, the master station uses a temporary address to measure the distance between the equidistant slave station and other slave stations. Generate a list. Based on the temporary address list, the master station transmits an adjacent station measurement request including the temporary address of the slave station to be measured to the equidistant slave station.
- #(1) means the slave station with temporary address #(1).
- Substations that are equidistant are #(1) and #(3).
- the master station transmits adjacent station measurement requests to #(1) and #(3) (step S109).
- the master station issues an instruction to #(1) to measure #(2) to #(4) except for the master station.
- the master station instructs #(3) to measure #(2) and #(4) except for the master station and #(1). ⁇ By the above, only one measurement on one side of the distance measurement of #(1) ⁇ #(3) and #(3) ⁇ #(1) suffices.
- an instruction to measure #(2) to #(4) for #(1) and an instruction to measure #(2) and #(4) for #(3) are given in the form of a list.
- the output be a temporary address list.
- the parent station can uniquely identify a child station and set a fixed address by the distance measurement function of each station. Further, according to the communication network 500 according to the present embodiment, it is possible to set slave station addresses as designed even for a plurality of slave stations in which the distance between the master station and the slave stations is the same.
- the functions of the address setting device 140 may be realized by software or by hardware.
- FIG. 10 is a diagram showing a configuration example of the address setting device 140 according to this embodiment.
- Address setting device 140 is a computer.
- Address setting device 140 includes processor 910 and other hardware such as memory 921 , auxiliary storage device 922 , input interface 930 , output interface 940 and communication device 950 .
- the address setting device 140 also includes a physical switch 145 .
- the processor 910 is connected to other hardware via signal lines and controls these other hardware.
- the address setting device 140 includes a temporary address setting section 141, a slave station address setting section 142, a duplicate address detection section 143, and a storage section 144 as functional elements.
- the storage unit 144 stores address information 31 and a temporary address table 32 .
- the functions of the temporary address setting unit 141, the child station address setting unit 142, and the duplicate address detection unit 143 are realized by software.
- the storage unit 144 is provided in the memory 921 .
- the storage unit 144 may be provided in the auxiliary storage device 922 or may be distributed between the memory 921 and the auxiliary storage device 922 .
- Processor 910 is a device that executes an address setting program.
- the address setting program is a program that realizes the functions of the temporary address setting section 141 , the slave station address setting section 142 and the duplicate address detection section 143 .
- the processor 910 is an IC that performs arithmetic processing. Examples of processor 910 are CPU, DSP, GPU.
- the IC is the back of the Integrated Circuit.
- DSP is an abbreviation for Digital Signal Processor.
- GPU is an abbreviation for Graphics Processing Unit.
- the memory 921 is a storage device that temporarily stores data.
- a specific example of the memory 921 is SRAM or DRAM.
- SRAM is an abbreviation for Static Random Access Memory.
- DRAM is an abbreviation for Dynamic Random Access Memory.
- Auxiliary storage device 922 is a storage device that stores data.
- a specific example of the auxiliary storage device 922 is an HDD.
- the auxiliary storage device 922 may be a portable storage medium such as an SD (registered trademark) memory card, CF, NAND flash, flexible disk, optical disk, compact disk, Blu-ray (registered trademark) disk, or DVD.
- SD registered trademark
- SD® is an abbreviation for Secure Digital
- CF is an abbreviation for CompactFlash®.
- DVD is an abbreviation for Digital Versatile Disk.
- the input interface 930 is a port connected to an input device such as a mouse, keyboard, or touch panel.
- the input interface 930 is specifically a USB terminal. Note that the input interface 930 may be a port connected to a LAN.
- USB is an abbreviation for Universal Serial Bus.
- LAN is an abbreviation for Local Area Network.
- the output interface 940 is a port to which a cable of an output device such as a display is connected.
- the output interface 940 is specifically a USB terminal or an HDMI (registered trademark) terminal.
- the display is specifically an LCD.
- Output interface 940 is also referred to as a display interface.
- HDMI registered trademark
- LCD is an abbreviation for Liquid Crystal Display.
- the communication device 950 has a receiver and a transmitter.
- a communication device 950 is connected to a communication network such as a LAN, the Internet, or a telephone line.
- the communication device 950 is specifically a communication chip or NIC.
- NIC is an abbreviation for Network Interface Card.
- the address setting program is executed in the address setting device 140.
- the address setting program is loaded into processor 910 and executed by processor 910 .
- the memory 921 stores not only the address setting program but also the OS.
- OS is an abbreviation for Operating System.
- the processor 910 executes the address setting program while executing the OS.
- the address setting program and OS may be stored in the auxiliary storage device 922 .
- the address setting program and OS stored in auxiliary storage device 922 are loaded into memory 921 and executed by processor 910 . Part or all of the address setting program may be incorporated into the OS.
- the address setting device 140 may include multiple processors to replace the processor 910 . These multiple processors share the execution of the address setting program. Each processor, like processor 910, is a device that executes an address setting program.
- the data, information, signal values and variable values used, processed or output by the address setting program are stored in the memory 921, the auxiliary storage device 922, or the register or cache memory within the processor 910.
- the "section" of each section of the temporary address setting section 141, the child station address setting section 142, and the duplicate address detection section 143 is read as “circuit", "process”, “procedure”, “processing”, or “circuitry”. good too.
- the address setting program causes the computer to execute a temporary address setting process, an address setting process, and a duplicate address detection process.
- the "processing" of the temporary address setting process, the address setting process, and the duplicate address detection process is referred to as "program”, “program product”, "computer-readable storage medium storing the program", or “computer-readable storage medium storing the program”. You may read it as "recording medium”.
- the address setting method is a method performed by the address setting device 140 executing an address setting program.
- the address setting program may be provided by being stored in a computer-readable recording medium.
- the address setting program may be provided as a program product.
- address setting device 140 As another example of the configuration of the address setting device 140, the functions of the temporary address setting section 141, the slave station address setting section 142, and the duplicate address detection section 143 may be realized by hardware. Specifically, address setting device 140 includes electronic circuitry 909 in place of processor 910 .
- FIG. 11 is a diagram showing another example of the configuration of the address setting device 140 according to this embodiment.
- the electronic circuit 909 is a dedicated electronic circuit that implements the functions of the temporary address setting section 141 , the child station address setting section 142 and the duplicate address detection section 143 .
- Electronic circuit 909 is specifically a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, a logic IC, GA, ASIC, or FPGA.
- GA is an abbreviation for Gate Array.
- ASIC is an abbreviation for Application Specific Integrated Circuit.
- FPGA is an abbreviation for Field-Programmable Gate Array.
- the functions of the temporary address setting unit 141, the child station address setting unit 142, and the duplicate address detection unit 143 may be implemented by one electronic circuit, or may be implemented by being distributed among a plurality of electronic circuits.
- part of the functions of the temporary address setting unit 141, the child station address setting unit 142, and the duplicate address detection unit 143 may be implemented by electronic circuits, and the remaining functions may be implemented by software. Also, part or all of the functions of the temporary address setting unit 141, the child station address setting unit 142, and the duplicate address detection unit 143 may be realized by firmware.
- Each processor and electronic circuit is also called processing circuitry. That is, the functions of the temporary address setting section 141, the child station address setting section 142, and the duplicate address detection section 143 are realized by the processing circuitry.
- Embodiment 2 differences from the first embodiment are mainly described.
- the same reference numerals are assigned to components having the same functions as those of the first embodiment, and the description thereof will be omitted.
- the configuration of the communication network 500 according to this embodiment is the same as that of the first embodiment.
- FIG. 13 shows a sequence following the sequence of FIG.
- the temporary address setting unit 141 of the parent station when the temporary address setting unit 141 of the parent station detects that no temporary address is set in each child station, it transmits a temporary address generation request to each child station to generate a temporary address. .
- the temporary address setting unit 141 of the master station receives the temporary address of each child station as a response to the temporary address generation request, and checks whether the received temporary address is registered in the temporary address table 32 or not. When it is confirmed that the received temporary address is not registered in the temporary address table 32, the temporary address setting unit 141 of the master station registers the received temporary address in the measurement target temporary address of the adjacency relationship in the temporary address table 32. , the permission for use of the received temporary address is transmitted to the slave station of the transmission source.
- the temporary address setting unit 141 of the child station Upon receiving a temporary address generation request requesting generation of a temporary address from the parent station, the temporary address setting unit 141 of the child station generates a temporary address of its own station. Then, the temporary address setting unit 141 of the child station transmits a use application request requesting an application for use of the temporary address of its own station to the master station.
- Duplicate address detection unit 143 of the slave station intercepts a usage application request from another slave station. When the duplicate address detection unit 143 of the slave station detects a temporary address that duplicates the temporary address of its own station, it notifies the master station and the slave station that transmitted the temporary address that duplicates the temporary address of its own station that the use application is rejected. Submit a permission request.
- the usage application disapproval request is for requesting disapproval of a usage application for a temporary address that overlaps with the temporary address of the own station. Specifically, it is as follows.
- Each child station has a temporary address (#(n) in FIGS. 12 and 13, where n is a positive integer) and a child station address (#m in FIGS. 12 and 13, where m is a positive integer )have.
- Temporary addresses and slave station addresses are not set at the beginning.
- the master station holds address information 31 to be set and a temporary address table 32 in the storage unit 144 .
- the master station initializes the temporary address table 32 .
- the parent station broadcasts a temporary address transmission request to the child stations.
- the child station since the child station does not have a temporary address, the child station transmits a temporary address transmission request response with data indicating non-holding of the temporary address to the parent station.
- the parent station recognizes that the child station does not have a temporary address.
- the parent station broadcasts a temporary address generation request to the child stations.
- step S206 after receiving the temporary address generation request, the slave station generates its own temporary address using a random number or the like.
- the slave station saves the generated temporary address in its own volatile memory or non-volatile memory.
- step S207 the child station periodically transmits the generated temporary address as a temporary address use application request to the master station at an arbitrary timing.
- a hash value for communication identification may be included in the transmission data and used to identify the transmission frame.
- step S208 the master station receives the temporary address utilization application request and confirms that there is no temporary address applied for in the temporary address table. The master station then registers the temporary address in the temporary address table 32 . In step S209, the master station transmits a usage permission response to the transmission source slave station having the temporary address.
- each slave station listens to the usage application request communication transmitted over the communication line and checks whether there is any usage application request communication containing the same temporary address as that of its own station.
- step S210 the child station requests the child station having the temporary address and the parent station to disable the use application to invalidate the temporary address.
- Send In the example of FIGS. 12 and 13, slave station 2 and slave station 4 generate the same temporary address #(1), and slave station 4 detects duplication of the temporary addresses and transmits a usage application disapproval request. .
- step S ⁇ b>211 when the master station receives the usage application disapproval request, it deletes the registration of the provisional address included in the usage application disapproval request from the provisional address table 32 .
- step S212 the master station transmits a temporary address reset request for resetting the temporary address. At this time, the slave station whose temporary address is reset is only the slave station having the temporary address specified in the use application disapproval request.
- step S213 the slave station that has received the temporary address reset request sets its own temporary address again using random numbers or the like.
- the master station receives a request for disapproval of use application for communication on the line and recognizes the disallowed temporary address.
- the temporary address reset request transmitted by the parent station can specify a non-permissible address as the transmission destination.
- the temporary address reset request data including the disallowed address is broadcast.
- Each slave station that receives the temporary address reset request by broadcast checks the non-permissible address included in the temporary address reset request and compares it with its own temporary address to determine whether reset is necessary. can.
- step S214 the slave station transmits a usage application request for the reset temporary address.
- a temporary address utilization application request for the temporary address reset by the slave station 2 is transmitted.
- step S215 the master station receives the temporary address usage application request and confirms that there is no temporary address applied for in the temporary address table. Then, the master station registers the temporary address in the temporary address table. In step S216, the master station transmits a usage permission response to the slave station that transmitted the temporary address. The slave station that has received the use permission response ends the periodical transmission of the temporary address use application request.
- step S217 setting of the temporary address to the child station is completed.
- a temporary address #(4) is set for slave station 1 .
- Temporary address #(3) is set for child station 2 .
- a temporary address #(2) is set for the slave station 3 .
- a temporary address #(1) is set for the slave station 4 .
- the distance measurement target is specified and the address is set.
- the child station includes means for generating a temporary address according to an instruction from the parent station when the own station does not have a temporary address, and means for intercepting the communication contents of the communication line. and means for analyzing intercepted communication contents.
- the parent station has means for collecting and storing temporary addresses.
- the slave station intercepts the contents of the temporary address setting communication during communication and detects the same temporary address setting communication as its own station, it instructs to reset the temporary address of the slave station having that temporary address and collects the master station.
- By transmitting an instruction to delete the temporary address it is possible to set the temporary address in the communication system without duplication.
- the temporary addresses are set without duplication, the distance measurement target is specified using the generated temporary addresses, as in the first embodiment.
- Embodiment 3 In this embodiment, differences from the first embodiment are mainly described. In the present embodiment, the same reference numerals are assigned to components having the same functions as those of the first embodiment, and the description thereof will be omitted.
- FIG. 14 is a diagram showing a configuration example of communication network 500a according to the present embodiment.
- the slave station does not have a temporary address in advance, it cannot specify the distance measurement target. Therefore, in the present embodiment, by measuring the distance from the child station to the parent station, the distance can be measured even if the child station does not have a temporary address in advance.
- the configuration of the communication station 100 according to this embodiment is the same as that of the first embodiment.
- FIG. 15 is a diagram showing a configuration example of the address information 31 according to this embodiment.
- the address information 31 is, as shown in FIG. 9, a table in which the distance between the slave station and the master station and the slave station address to be set are linked.
- FIG. 17 shows a sequence following the sequence of FIG.
- the temporary address setting unit 141 of the parent station When the temporary address setting unit 141 of the parent station detects that the temporary address is not set to each child station, it transmits a distance measurement start request to each child station to start measuring the distance to the parent station.
- the temporary address setting unit 141 of the parent station receives a measurement right acquisition request as a response to the distance measurement start request from one of the plurality of child stations.
- the temporary address setting unit 141 of the parent station transmits a measurement right acquisition request response, which is a response to the measurement right acquisition request, to the one child station, and the one child station communicates with the one child station.
- the result of measuring the distance is received as slave station measurement information.
- the slave station address setting unit 142 of the master station analyzes the connection configuration between the master station and each slave station in the communication network 500 based on the slave station measurement information.
- the child station address setting unit 142 of the parent station sets the child station address to the temporary address of each child station using the address information 31 in which the child station address to be set to the child station specified from the connection configuration is registered. set.
- the temporary address setting unit 141 of the slave station receives from the master station a distance measurement start request requesting each slave station to start measuring the distance to the master station.
- the temporary address setting unit 141 of the child station transmits a measurement right acquisition request requesting acquisition of the measurement right to the master station.
- the temporary address setting unit 141 of the slave station receives a measurement right acquisition request response permitting the acquisition of the measurement right from the master station, it measures the distance to the master station, and sends the measured result as slave station measurement information to the master station. station.
- the duplicate address detection unit 143 of the slave station intercepts the measurement right acquisition request communication from another slave station.
- the duplicate address detection unit 143 of the slave station detects communication of the measurement right acquisition request by another slave station, it stops transmission of the measurement right acquisition request of its own station, and retransmits the measurement right acquisition request after a certain period of time has elapsed. to implement.
- step S ⁇ b>301 the master station initializes the temporary address table 32 .
- Each slave station has a temporary address (#(n) in FIGS. 16 and 17, where n is a positive integer), a slave station address (#m in FIGS. 16 and 17, where m is a positive integer), and a distance measurement result ( [p] in FIGS. 16 and 17, p is an arbitrary numerical value).
- the temporary address, child station address and distance measurement result are not set at the beginning.
- the distance between each station is the sum of the distances between the stations passed through.
- Steps S302 to S304 are the same as steps S202 to S204 in the second embodiment.
- step S305 the parent station broadcasts a distance measurement start request to the child stations.
- step S306 after receiving the distance measurement start request, the slave station periodically transmits a measurement right acquisition request to the master station at an arbitrary timing.
- the data portion of the measurement right acquisition request can include a hash value, etc., and can be used to identify the transmission frame.
- each slave station listens to the communication of the measurement right acquisition request, and if the communication of the measurement right acquisition request is made before the own station, stops the transmission from the own station, and again after a certain time. try to send.
- the master station transmits a distance measurement start request requesting the start of distance measurement to the slave station as a response to the received measurement right acquisition request.
- step S309 if the slave station receives a request to start distance measurement after transmitting the request to acquire the measurement right, it means that the slave station has acquired the right to measure, and starts measuring the distance to the master station.
- the master station transmits a response to the distance measurement frame.
- the slave station stores the slave station measurement information, which is the measurement result, in its own volatile or nonvolatile memory, and transmits the distance measurement result (slave station measurement information) to the master station.
- step S312 the master station receives the distance measurement result (slave station measurement information) from the slave station to which it has given the measurement right, stores the distance measurement result (slave station measurement information) in the temporary address table, and generates the measurement start frame. Broadcast again. 16 and 17, the parent station receives the distance measurement result (child station measurement information) #( )/#/[2] from the child station 2 and stores it in the temporary address table 32 .
- the master station If the master station does not receive a new measurement right acquisition request within a certain period of time after repeating the above procedure, it determines that distance measurement has been completed in all the slave stations. Also, the master station grasps the number of slave stations existing in the communication network 500a from the address information 31 to be allocated stored in the storage unit 144, and the number of slave stations is recorded in the temporary address table 32. make sure there is As a result, the parent station can quickly recognize that all the child stations have completed distance measurement without waiting for a certain period of time.
- step S313 when the master station recognizes that the distance measurement of the slave station has been completed, the master station compares the distance measurement result (slave station measurement information) stored in the temporary address table 32 with the address information 31, and measures the distance. Check if the slave station that matches the result (slave station measurement information) matches the address you want to assign.
- step S314 the master station broadcasts an address setting request including the distance measurement result (slave station measurement information) and the address to be set.
- the slave station intercepts the communication, and if there is data that matches the distance measurement result (slave station measurement information) of its own station in the communication data, it sets the address to be set in the address setting request as the slave station address of its own station. , in volatile or non-volatile memory.
- a slave station that receives an address setting request that does not match the distance measurement result (slave station measurement information) of its own station discards the communication data.
- the parent station repeats the above operations up to the number of child stations stored in the temporary address table 32 .
- the master station instructs each slave station to initiate distance measurement communication.
- Each slave station measures the distance to the master station, holds the measurement result in its own storage device, and transmits the measured distance measurement result to the master station.
- the master station collects distance measurement results.
- the master station associates the collected distance measurement result between the master station and the slave station with the address to be set, and transmits address setting communication including the distance measurement result and the address to be set.
- the slave station intercepts the address setting communication received from the master station and analyzes the content to set the address of the address setting communication that matches the result of measuring the distance to the master station owned by the slave station.
- each part of the address setting device has been described as an independent functional block.
- the configuration of the address setting device does not have to be the configuration of the embodiment described above.
- the functional blocks of the address setting device may have any configuration as long as they can implement the functions described in the above embodiments.
- the address setting device may be a system composed of a plurality of devices instead of a single device.
- these embodiments may be implemented in any combination as a whole or in part. That is, in Embodiments 1 to 3, it is possible to freely combine each embodiment, modify any component of each embodiment, or omit any component from each embodiment.
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Abstract
Description
そこで、子局のアドレス設定では、自動的かつ子局に一定のアドレスが設定される方式が求められる。
前記複数の子局の各子局の仮アドレスと、前記親局と各子局との距離を計測した距離計測結果とを取得し、各子局の仮アドレスと、前記親局と各子局との距離計測結果とを仮アドレステーブルに登録する仮アドレス設定部と、
前記親局と各子局との距離計測結果に基づいて、前記親局からの距離が等しい複数の子局を等距離子局として抽出し、前記等距離子局の各々に対して隣接する子局との距離の計測を要求し、前記等距離子局の各々と隣接する子局との距離を計測した結果を隣接距離結果として取得し、前記等距離子局の仮アドレスと、前記等距離子局の各々と隣接する子局との隣接距離結果とを前記仮アドレステーブルに登録する重複アドレス検出部と、
前記仮アドレステーブルに基づいて前記通信ネットワークにおける前記親局と各子局との接続構成を解析し、前記接続構成から特定される子局に設定すべき子局アドレスが登録されたアドレス情報を用いて、各子局の仮アドレスに対して子局アドレスを設定する子局アドレス設定部と
を備える。
***構成の説明***
図1は、本実施の形態に係る通信ネットワーク500の構成例を示す図である。
通信ネットワーク500は、複数の通信局100が接続された通信システムである。通信ネットワーク500には、親局101と複数の子局102とが通信線103により接続されている。具体的には、通信ネットワーク500には、親局101と複数の子局102とがバス型ネットワークに接続されている。
例えば、通信ネットワーク500は、ビルあるいは工場といった設備において用いられる設備ネットワークである。設備ネットワークでは、空調室内機および空調室外機といった設備機器が、これらの設備機器を遠隔制御するための通信制御用のネットワークに接続されている。
また、各子局は、自局を識別する重複のない仮アドレスを有している。例えば、各子局は、Ethernet(商標登録)におけるMACアドレスを仮アドレスとして有している。
通信局100は、制御部130、通信回路120、距離計測回路110、および、アドレス設定装置140を有する。
アドレス設定装置140は、仮アドレス設定部141、子局アドレス設定部142、重複アドレス検出部143、記憶部144、および、物理スイッチ145を有する。物理スイッチ145は、例えば、DIPスイッチである。また、各局の役割によっては、アドレス設定装置140は機能の一部を使用しなくても良い。
CPUなどによって構成される制御部は、自局の設備機器および通信を制御する。例として、親局の制御部にファンあるいは圧縮機を接続し、子局の制御部にルーバーなどを接続して制御することで空調システムを構成することができる。
アドレス設定装置140の記憶部144は、不揮発メモリおよび揮発メモリを持つ。
親局は、アドレス情報31を記憶部144に記憶している。例えば、記憶部144は、通信線103により接続される管理局によってアドレス情報31を外部から取得し、取得したアドレス情報31を記憶してもよい。
アドレス情報31は、通信ネットワーク500における親局と各子局との接続構成から特定される子局に設定すべき子局アドレスが登録されている。
隣接関係は、隣接元と隣接先との隣接関係を示す。隣接関係は、通信ネットワーク500における接続関係を表している。
隣接局距離は、各局間の距離である。
子局アドレスは、子局に設定したいアドレスである。
物理スイッチの設定値は、例えば、DIPスイッチの設定値である。
設置場所情報は、子局が設置される場所の情報である。
親局は、子局の仮アドレスおよび距離計測結果といった情報を登録する仮アドレステーブル32を記憶部144に記憶する。
隣接関係は、計測元仮アドレスと計測先の仮アドレスとの隣接関係が登録される。隣接関係は、通信ネットワーク500における接続関係を表している。
距離計測結果は、各局間の距離を計測した結果が登録される。
物理スイッチの設定値には、例えば、DIPスイッチに設定されている値が登録される。
子局アドレスは、最終的に子局に設定されたアドレスが登録される。
アドレス設定装置140の子局アドレス設定部142は、制御部130あるいは他局からの要求に応じて設定すべき子局アドレスの決定、および、子局アドレスの設定処理を行う。
アドレス設定装置140の重複アドレス検出部143は、例えば、傍聴した通信内容からアドレスの重複を検出する。
次に、本実施の形態に係る通信ネットワーク500におけるアドレス設定処理の動作について説明する。通信ネットワーク500における各局の動作手順は、アドレス設定方法に相当する。また、通信ネットワーク500における各局の動作を実現するプログラムは、アドレス設定プログラムに相当する。
図6は、図5のシーケンスの続きのシーケンスを示している。
また、図3に示すように、各局間の距離は1mで、親局と各子局との距離は、経由した局間の距離の総和である。例えば、親局と子局4の距離は2mである。加えて、子局4のDIPスイッチは1を設定し、その他の子局は0を設定しているものとする。
まず、親局の仮アドレス設定部141は、複数の子局の各子局の仮アドレスと、親局と各子局との距離を計測した距離計測結果とを取得する。親局の仮アドレス設定部141は、各子局の仮アドレスと、親局と各子局との距離計測結果とを仮アドレステーブル32に登録する。
親局の仮アドレス設定部141は、複数の子局の各子局に仮アドレスの送信を要求する仮アドレス送信要求を送信する。そして、親局の仮アドレス設定部141は、仮アドレス送信要求への応答として複数の子局の各子局の仮アドレスを受信する。
具体的には、以下の通りである。
そして、ステップS102において、親局の仮アドレス設定部141は、子局に対して仮アドレス送信要求を同報する。
ステップS106において、子局は、親局との距離を距離計測フレーム応答として送信する。
ステップS107において、親局は、距離計測フレーム応答により得られた各子局との距離である距離計測結果を、子局の仮アドレスと結びついた情報として仮アドレステーブル32に登録する。
図7では、親局から子局の距離を計測した距離計測結果を反映した仮アドレステーブル32を示している。
親局の重複アドレス検出部143は、親局と各子局との距離計測結果に基づいて、親局からの距離が等しい複数の子局を等距離子局104として抽出する。親局の重複アドレス検出部143は、等距離子局104の各々に対して隣接する子局との距離の計測を要求する(隣接局計測要求)。そして、親局の重複アドレス検出部143は、等距離子局104の各々と隣接する子局との距離を計測した結果を距離計測結果(隣接距離結果)として取得する。
親局の重複アドレス検出部143は、等距離子局104の仮アドレスと、等距離子局104の各々と隣接する子局との距離計測結果(隣接距離結果)とを仮アドレステーブル32に登録する。
具体的には、以下の通りである。
ステップS111において、隣接局計測要求を受け取った子局は、計測対象となる子局の仮アドレスの収集をすべて完了すると、計測した結果を隣接局計測要求応答として親局に送信する。
親局の重複アドレス検出部143は、仮アドレステーブル32に隣接局計測要求応答の内容を登録する。
図8では、子局4(#(1))からの他の子局の距離計測した結果を反映した仮アドレステーブル32を示している。
図9では、子局2(#(3))からの他の子局の距離計測した結果を反映した仮アドレステーブル32を示している。
親局の子局アドレス設定部142は、仮アドレステーブル32に基づいて通信ネットワーク500における親局と各子局との接続構成を解析する。子局アドレス設定部142は、解析により得られた接続構成から特定される子局に設定すべき子局アドレスが登録されたアドレス情報31を用いて、各子局の仮アドレスに対して子局アドレスを設定する。
なお、親局の子局アドレス設定部142は、各子局から、各子局が備える物理スイッチに設定されている値を設定情報として取得してもよい。この場合、親局の子局アドレス設定部142は、取得した設定情報と接続構成とから特定される子局の仮アドレスに対して子局アドレスを設定する。
具体的には、以下の通りである。
したがって、親局の子局アドレス設定部142は、図3のアドレス情報31の隣接関係と、図7から図9の仮アドレステーブル32で示される隣接関係とを照らし合わせることにより、子局の仮アドレスに対応する子局アドレスを関連付けることができる。
具体的には、子局1(仮アドレス#(4))に対して子局アドレス#1が設定される。子局2(仮アドレス#(3))に対して子局アドレス#2が設定される。子局3(仮アドレス#(2))に対して子局アドレス#3が設定される。子局4(仮アドレス#(1))に対して子局アドレス#4が設定される。
なお、最終的に保存する仮アドレステーブルは、最終的に設定された子局アドレスを追加した図7の仮アドレステーブルのみを保存してもよい。あるいは、図8および図9の仮アドレステーブルのような個別の計測結果も含む図7から図9の全ての仮アドレステーブルを保存してもよい。
<変形例1>
ステップS109では、親局の重複アドレス検出部は、距離計測結果より、子局2と子局4がそれぞれどの子局と隣接しているか調べるため、子局2と子局4に計測対象となる子局の仮アドレスを隣接局計測要求に含めて送信する。
ここで、隣接局計測要求に計測対象となる子局の仮アドレスを含める際に、仮アドレスリストを用いる態様について説明する。
・等距離にある子局は、#(1)、#(3)とする。
・親局は、#(1)と#(3)に隣接局計測要求を送信する(ステップS109)。
・このとき、ステップS109では、親局は、#(1)に対して、親局を除き、#(2)~#(4)を計測する指示を出す。また、親局は、#(3)に対して、親局と#(1)を除き、#(2)と#(4)を計測する指示を出す。
・以上により、#(1)→#(3)、#(3)→#(1)の距離計測の内、片側1回の計測のみでよくなる。
仮アドレスリストを用いることにより、計測対象の子局を限定することができ、重複する計測対象のアドレスを事前に間引くことができるという効果がある。
以上のように、本実施の形態に係る通信ネットワーク500によれば、各局が持つ距離計測機能により、親局は子局を一意に特定して一定のアドレスを設定することができる。そして、本実施の形態に係る通信ネットワーク500によれば、親局と子局間の距離が等距離にある複数の子局に対しても、設計通りに子局アドレスを設定することができる。
ここで、アドレス設定装置140の機能はソフトウェアで実現されてもよいし、ハードウェアで実現されてもよい。
まず、アドレス設定装置140の機能がソフトウェアで実現される場合のハードウェア構成例について説明する。
アドレス設定装置140は、コンピュータである。アドレス設定装置140は、プロセッサ910を備えるとともに、メモリ921、補助記憶装置922、入力インタフェース930、出力インタフェース940、および通信装置950といった他のハードウェアを備える。また、アドレス設定装置140は、物理スイッチ145を備える。プロセッサ910は、信号線を介して他のハードウェアと接続され、これら他のハードウェアを制御する。
プロセッサ910は、演算処理を行うICである。プロセッサ910の具体例は、CPU、DSP、GPUである。ICは、Integrated Circuit乗る悪後である。DSPは、Digital Signal Processorの略語である。GPUは、Graphics Processing Unitの略語である。
補助記憶装置922は、データを保管する記憶装置である。補助記憶装置922の具体例は、HDDである。また、補助記憶装置922は、SD(登録商標)メモリカード、CF、NANDフラッシュ、フレキシブルディスク、光ディスク、コンパクトディスク、ブルーレイ(登録商標)ディスク、DVDといった可搬の記憶媒体であってもよい。なお、HDDは、Hard Disk Driveの略語である。SD(登録商標)は、Secure Digitalの略語である。CFは、CompactFlash(登録商標)の略語である。DVDは、Digital Versatile Diskの略語である。
アドレス設定プログラムは、コンピュータ読取可能な記録媒体に格納されて提供されてもよい。また、アドレス設定プログラムは、プログラムプロダクトとして提供されてもよい。
具体的には、アドレス設定装置140は、プロセッサ910に替えて電子回路909を備える。
電子回路909は、仮アドレス設定部141と子局アドレス設定部142と重複アドレス検出部143との機能を実現する専用の電子回路である。電子回路909は、具体的には、単一回路、複合回路、プログラム化したプロセッサ、並列プログラム化したプロセッサ、ロジックIC、GA、ASIC、または、FPGAである。GAは、Gate Arrayの略語である。ASICは、Application Specific Integrated Circuitの略語である。FPGAは、Field-Programmable Gate Arrayの略語である。
本実施の形態では、主に、実施の形態1と異なる点について説明する。
本実施の形態において、実施の形態1と同様の機能を有する構成については同一の符号を付し、その説明を省略する。
実施の形態1では、図1の通信ネットワーク500の構成において、子局があらかじめ仮アドレスを有することを前提としている。子局が仮アドレスを有さない場合、距離計測対象を指定することができない。
そこで、本実施の形態では、親局によって仮アドレスを子局に設定することで子局を一時的に特定する態様について説明する。
図12および図13は、本実施の形態に係る通信ネットワーク500におけるアドレス設定処理の動作を示すシーケンス図である。
図13は、図12のシーケンスの続きのシーケンスを示している。
子局の重複アドレス検出部143は、他の子局による利用申請要求を傍受する。子局の重複アドレス検出部143は、自局の仮アドレスと重複する仮アドレスを検出すると、親局と、自局の仮アドレスと重複する仮アドレスの送信元の子局とに、利用申請不許可要求を送信する。利用申請不許可要求は、自局の仮アドレスと重複する仮アドレスの利用申請の不許可を要求するものである。
具体的には、以下の通りである。
ステップS201において、親局は、仮アドレステーブル32を初期化する。
ステップS202において、親局は、子局へ仮アドレス送信要求を同報する。
ステップS203において、子局は、自局が仮アドレスを持たないため、親局に仮アドレス不保持を示すデータを持った仮アドレス送信要求応答を送信する。
ステップS204において、親局は、子局に仮アドレスがないことを認識する。
ステップS205において、親局は、子局に対して仮アドレス生成要求を同報する。
その後、ステップS207において、子局は、生成した仮アドレスを仮アドレス利用申請要求として親局に任意のタイミングで定期的に送信する。この時、送信データ中に通信識別用のハッシュ値を含めるなどして、送信フレームの識別に用いてもよい。
ステップS209において、親局は、当該仮アドレスをもつ送信元の子局に利用許可応答を送信する。
図12および図13の例では、子局2と子局4が同じ仮アドレス#(1)を生成し、子局4が仮アドレスの重複を検出して利用申請不許可要求を送信している。
ステップS212において、親局は、仮アドレスを再設定する仮アドレス再設定要求を送信する。この時、仮アドレスが再設定される子局は、利用申請不許可要求で指定された仮アドレスを持つ子局のみである。
親局は、回線を通信する利用申請不許可要求を受信し、不許可される仮アドレスを認識している。また、親局の送信する仮アドレス再設定要求は、送信先に不許可するアドレスを指定することができる。もしくは、仮アドレス再設定要求のデータに不許可アドレスを含んで同報する。同報により仮アドレス再設定要求を受信した各子局において、仮アドレス再設定要求に含まれる不許可アドレスを調べ、自局の仮アドレスと比較することで再設定の要否を判断することができる。
ステップS216において、親局は、当該仮アドレスの送信元の子局に利用許可応答を送信する。利用許可応答を受け取った子局は、仮アドレス利用申請要求の定期送信を終了する。
図13の具体例では、子局1に対して仮アドレス#(4)が設定される。子局2に対して仮アドレス#(3)が設定される。子局3に対して仮アドレス#(2)が設定される。子局4に対して仮アドレス#(1)が設定される。
親局は仮アドレスの収集と保存をする手段を有する。
子局は、通信中の仮アドレス設定通信の内容を傍受して、自局と同じ仮アドレス設定通信を検出すると、その仮アドレスを持つ子局の仮アドレスの再設定する指示と親局の収集した当該仮アドレスを削除する指示を送信することで通信システム内に仮アドレスが重複することなく設定することを可能とする。
仮アドレスが重複することなく設定されると、実施の形態1と同様に、生成した仮アドレスを用いて距離計測対象を指定する。
以上のように、本実施の形態に係る通信ネットワークによれば、子局が仮アドレスを有さない場合であっても、親局によって仮アドレスを子局に設定することで子局を一時的に特定することができる。
本実施の形態では、主に、実施の形態1と異なる点について説明する。
本実施の形態において、実施の形態1と同様の機能を有する構成については同一の符号を付し、その説明を省略する。
図14は、本実施の形態に係る通信ネットワーク500aの構成例を示す図である。
図14の通信ネットワーク500aの構成において、子局があらかじめ仮アドレスを有さない場合、距離計測対象を指定することができない。
そこで、本実施の形態では、子局から親局への距離計測をすることで、子局があらかじめ仮アドレスを有さない場合でも距離計測を可能にする態様について説明する。
アドレス情報31は、図9に示すように、子局と親局との距離、設定したい子局アドレスが結び付けられたテーブルである。
図16および図17は、本実施の形態に係る通信ネットワーク500aにおけるアドレス設定処理の動作を示すシーケンス図である。
図17は、図16のシーケンスの続きのシーケンスを示している。
親局の子局アドレス設定部142は、親局と各子局とを子局計測情報に基づいて通信ネットワーク500における親局と各子局との接続構成を解析する。親局の子局アドレス設定部142は、接続構成から特定される子局に設定すべき子局アドレスが登録されたアドレス情報31を用いて、各子局の仮アドレスに対して子局アドレスを設定する。
なお、子局の重複アドレス検出部143は、他の子局による計測権取得要求の通信を傍受する。子局の重複アドレス検出部143は、他の子局による計測権取得要求の通信を検出すると、自局の計測権取得要求の送信を停止し、一定時間経過後に再度、計測権取得要求の送信を実施する。
各子局は、仮アドレス(図16および図17における#(n)、nは正の整数)と子局アドレス(図16および図17における#m、mは正の整数)、距離計測結果(図16および図17における[p]、pは任意の数値)を持つ。しかし、仮アドレス、子局アドレスおよび距離計測結果は最初の時点では設定されていない。また、各局間の距離は、経由した局間の距離の総和である。
ステップS306において、子局は、距離計測開始要求を受信した後、任意のタイミングかつ定期的に計測権取得要求を親局に送信する。このとき、計測権取得要求のデータ部にはハッシュ値などを含めて送信フレームの識別に用いることができる。
ステップS308において、親局は、受信した計測権取得要求に対する応答として、親局との距離の計測の開始を要求する距離計測開始要求を子局に送信する。
ステップS310において、親局は、距離計測フレームに対する応答を送信する。
ステップS311において、子局は、計測結果である子局計測情報を自局の揮発メモリもしくは不揮発メモリに保存し、距離計測結果(子局計測情報)を親局に送信する。
ステップS312において、親局は、計測権を与えた子局から距離計測結果(子局計測情報)を受信し、距離計測結果(子局計測情報)を仮アドレステーブルに保存し、計測開始フレームを再度同報する。
図16および図17の例では、親局は、子局2から距離計測結果(子局計測情報)#()/#/[2]を受信し、仮アドレステーブル32に保存している。
また、親局は、記憶部144に保存されている割付けたいアドレス情報31から通信ネットワーク500a中に存在する子局の数を把握し、仮アドレステーブル32に子局の数のデータが記録されていることを確認する。これにより、親局は、一定時間を待たずにすべての子局が距離計測を完了したことを早期に把握することもできる。
子局は、通信を傍受し、通信データ中に自局の距離計測結果(子局計測情報)と一致するデータがある場合、アドレス設定要求の設定したいアドレスを自局の子局アドレスとして設定し、揮発メモリあるいは不揮発メモリに保存する。自局の距離計測結果(子局計測情報)と一致しないアドレス設定要求を受信した子局は当該通信データを破棄する。
親局は、以上の操作を仮アドレステーブル32に保存されている子局の数まで繰り返す。
子局は親局から受信したアドレス設定通信を傍受して内容を解析することで自局の持つ親局との距離計測結果と一致するアドレス設定通信のアドレスを自局に設定する。
以上のように、本実施の形態に係る通信ネットワークによれば、子局はあらかじめ仮アドレスを持たなくてもアドレスを自動設定することが可能となる。また、本実施の形態で示された方法は、実施の形態1で仮アドレスの代わりに親局と子局間の距離計測結果を仮アドレスに使うものであるから、実施の形態1で示した親局と子局間が等距離にある子局が通信ネットワーク内に存在する場合であってもアドレス設定ができる。
また、実施の形態1から3のうち、複数の部分を組み合わせて実施しても構わない。あるいは、これらの実施の形態のうち、1つの部分を実施しても構わない。その他、これらの実施の形態を、全体としてあるいは部分的に、どのように組み合わせて実施しても構わない。
すなわち、実施の形態1から3では、各実施の形態の自由な組み合わせ、あるいは各実施の形態の任意の構成要素の変形、もしくは各実施の形態において任意の構成要素の省略が可能である。
Claims (13)
- 親局と複数の子局とが通信線により接続された通信ネットワークに含まれる前記親局に備えられるアドレス設定装置において、
前記複数の子局の各子局の仮アドレスと、前記親局と各子局との距離を計測した距離計測結果とを取得し、各子局の仮アドレスと、前記親局と各子局との距離計測結果とを仮アドレステーブルに登録する仮アドレス設定部と、
前記親局と各子局との距離計測結果に基づいて、前記親局からの距離が等しい複数の子局を等距離子局として抽出し、前記等距離子局の各々に対して隣接する子局との距離の計測を要求し、前記等距離子局の各々と隣接する子局との距離を計測した結果を隣接距離結果として取得し、前記等距離子局の仮アドレスと、前記等距離子局の各々と隣接する子局との隣接距離結果とを前記仮アドレステーブルに登録する重複アドレス検出部と、
前記仮アドレステーブルに基づいて前記通信ネットワークにおける前記親局と各子局との接続構成を解析し、前記接続構成から特定される子局に設定すべき子局アドレスが登録されたアドレス情報を用いて、各子局の仮アドレスに対して子局アドレスを設定する子局アドレス設定部と
を備えたアドレス設定装置。 - 前記仮アドレス設定部は、
前記複数の子局の各子局に仮アドレスの送信を要求する仮アドレス送信要求を送信し、前記仮アドレス送信要求への応答として前記複数の子局の各子局の仮アドレスを受信する請求項1に記載のアドレス設定装置。 - 前記仮アドレス設定部は、
前記複数の子局の各子局に仮アドレスが設定されていないことを検出すると、前記複数の子局の各子局に仮アドレスの生成を要求する仮アドレス生成要求を送信し、前記仮アドレス生成要求への応答として前記複数の子局の各子局の仮アドレスを受信し、受信した仮アドレスが前記仮アドレステーブルに登録されていないことを確認すると、前記受信した仮アドレスを前記仮アドレステーブルに登録するとともに、送信元の子局に前記受信した仮アドレスの利用許可を送信する請求項1に記載のアドレス設定装置。 - 前記重複アドレス検出部は、
前記複数の子局の各子局の仮アドレスに対して計測対象とする子局の仮アドレスを対応付けた仮アドレスリストに基づいて、前記等距離子局の各々に対して隣接する子局との距離の計測を要求する隣接局計測要求であって、計測対象となる子局の仮アドレスを含む隣接局計測要求を前記等距離子局の各々に送信する請求項1から請求項3のいずれか1項に記載のアドレス設定装置。 - 親局と複数の子局とが通信線により接続された通信ネットワークに含まれる前記親局に備えられるアドレス設定装置において、
前記複数の子局の各子局に仮アドレスが設定されていないことを検出すると、各子局に前記親局との距離の計測開始を要求する距離計測開始要求を送信し、前記複数の子局の1の子局から前記距離計測開始要求に対する応答として計測権取得要求を受信すると、前記計測権取得要求への応答である計測権取得要求応答を前記1の子局へ送信し、前記1の子局から前記親局と前記1の子局との距離を計測した結果を子局計測情報として受信する仮アドレス設定部と、
前記親局と各子局とのを子局計測情報に基づいて前記通信ネットワークにおける前記親局と各子局との接続構成を解析し、前記接続構成から特定される子局に設定すべき子局アドレスが登録されたアドレス情報を用いて、各子局の仮アドレスに対して子局アドレスを設定する子局アドレス設定部と
を備えたアドレス設定装置。 - 前記複数の子局の各子局は、物理スイッチを備え、
前記アドレス情報には、前記複数の子局の各子局に対して前記物理スイッチの設定値が設定されており、
前記子局アドレス設定部は、
前記複数の子局の各子局から、各子局が備える物理スイッチに設定されている値を設定情報として取得し、取得した設定情報と前記接続構成から特定される子局の仮アドレスに対して前記子局アドレスを設定する請求項1から請求項5のいずれか1項に記載のアドレス設定装置。 - 前記アドレス設定装置は、
前記通信線により接続される管理局によって前記アドレス情報を外部から取得し、取得した前記アドレス情報を記憶する記憶部を備える請求項1から請求項6のいずれか1項に記載のアドレス設定装置。 - 親局と複数の子局とが通信線により接続された通信ネットワークに含まれる前記子局に備えられるアドレス設定装置において、
前記親局から仮アドレスの生成を要求する仮アドレス生成要求を受信すると、自局の仮アドレスを生成し、前記自局の仮アドレスの利用申請を要求する利用申請要求を前記親局へ送信する仮アドレス設定部と、
他の子局による利用申請要求を傍受し、前記自局の仮アドレスと重複する仮アドレスを検出すると、前記親局と、前記自局の仮アドレスと重複する仮アドレスの送信元の子局とに、前記自局の仮アドレスと重複する仮アドレスの利用申請の不許可を要求する利用申請不許可要求を送信する重複アドレス検出部と
を備えるアドレス設定装置。 - 親局と複数の子局とが通信線により接続された通信ネットワークに含まれる前記子局に備えられるアドレス設定装置において、
前記親局から、前記複数の子局の各子局に前記親局との距離の計測開始を要求する距離計測開始要求を受信すると、計測権の取得を要求する計測権取得要求を前記親局に送信し、前記親局から計測権の取得を許可する計測権取得要求応答を受信すると、前記親局との距離の計測を実施し、計測した結果を子局計測情報として前記親局へ送信する仮アドレス設定部を備えるアドレス設定装置。 - 前記アドレス設定装置は、
他の子局による前記計測権取得要求の通信を傍受し、前記他の子局による前記計測権取得要求の通信を検出すると、自局の前記計測権取得要求の送信を停止し、一定時間経過後に再度、前記計測権取得要求の送信を実施する重複アドレス検出部を備えた請求項9に記載のアドレス設定装置。 - 前記アドレス設定装置は、
新規な子局が前記通信ネットワークに接続されると前記複数の子局に対するアドレスの設定処理を開始する請求項1から請求項10のいずれか1項に記載のアドレス設定装置。 - 親局と複数の子局とが通信線により接続された通信ネットワークに含まれる前記親局に備えられるアドレス設定装置に用いられるアドレス設定方法において、
コンピュータが、前記複数の子局の各子局の仮アドレスと、前記親局と各子局との距離を計測した距離計測結果とを取得し、各子局の仮アドレスと、前記親局と各子局との距離計測結果とを仮アドレステーブルに登録し、
コンピュータが、前記親局と各子局との距離計測結果に基づいて、前記親局からの距離が等しい複数の子局を等距離子局として抽出し、前記等距離子局の各々に対して隣接する子局との距離の計測を要求し、前記等距離子局の各々と隣接する子局との距離を計測した結果を隣接距離結果として取得し、前記等距離子局の仮アドレスと、前記等距離子局の各々と隣接する子局との隣接距離結果とを前記仮アドレステーブルに登録し、
コンピュータが、前記仮アドレステーブルに基づいて前記通信ネットワークにおける前記親局と各子局との接続構成を解析し、前記接続構成から特定される子局に設定すべき子局アドレスが登録されたアドレス情報を用いて、各子局の仮アドレスに対して子局アドレスを設定するアドレス設定方法。 - 親局と複数の子局とが通信線により接続された通信ネットワークに含まれる前記親局に備えられるアドレス設定装置に用いられるアドレス設定プログラムにおいて、
前記複数の子局の各子局の仮アドレスと、前記親局と各子局との距離を計測した距離計測結果とを取得し、各子局の仮アドレスと、前記親局と各子局との距離計測結果とを仮アドレステーブルに登録する仮アドレス設定処理と、
前記親局と各子局との距離計測結果に基づいて、前記親局からの距離が等しい複数の子局を等距離子局として抽出し、前記等距離子局の各々に対して隣接する子局との距離の計測を要求し、前記等距離子局の各々と隣接する子局との距離を計測した結果を隣接距離結果として取得し、前記等距離子局の仮アドレスと、前記等距離子局の各々と隣接する子局との隣接距離結果とを前記仮アドレステーブルに登録する重複アドレス検出処理と、
前記仮アドレステーブルに基づいて前記通信ネットワークにおける前記親局と各子局との接続構成を解析し、前記接続構成から特定される子局に設定すべき子局アドレスが登録されたアドレス情報を用いて、各子局の仮アドレスに対して子局アドレスを設定する子局アドレス設定処理と
をコンピュータである前記アドレス設定装置に実行させるアドレス設定プログラム。
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JPH0936886A (ja) * | 1995-07-18 | 1997-02-07 | Tokyo Electric Power Co Inc:The | 子局アドレス設定方法 |
JP2004129164A (ja) * | 2002-10-07 | 2004-04-22 | Ntt Docomo Inc | 移動端末、転送装置、通信システム、通信方法及びプログラム |
JP2020041735A (ja) | 2018-09-10 | 2020-03-19 | ダイキン工業株式会社 | アドレス設定装置および空調システム |
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JPH0936886A (ja) * | 1995-07-18 | 1997-02-07 | Tokyo Electric Power Co Inc:The | 子局アドレス設定方法 |
JP2004129164A (ja) * | 2002-10-07 | 2004-04-22 | Ntt Docomo Inc | 移動端末、転送装置、通信システム、通信方法及びプログラム |
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