JP6531938B2 - Communication system, network entry method, parent device, host device and program - Google Patents

Description

The present invention relates to a communication system, a method for entering a network , a parent device, a host device, and a program, and more specifically, a communication system in which information collected from a child device by a parent device is transmitted to a host device, a method for entering a network , a parent device It relates to a host device and a program.

  Conventionally, there has been a power information collecting system in which a concentrator transmits information collected from a smart meter to a head end (see, for example, Patent Document 1).

  In this power information collection system, when the smart meter newly connected to the power line transmits a connection request indicating the MAC address of the power line to the concentrator, the concentrator holds the slave device list held and the MAC address indicated by the connection request. Match against. If the MAC address indicated by the connection request does not exist in the handset list, the concentrator sends a NACK indicating the connection non-permission to the smart meter. When the smart meter receives NACK from the concentrator that has sent the connection request, it sends a connection request indicating the MAC address of its own to another concentrator. When another concentrator receives a connection request from the smart meter, it checks the child device list holding the MAC address indicated by the connection request, and if the MAC address indicated by the connection request exists in the child device list, permits connection. Send the indicated ACK to the smart meter. When the smart meter receives an ACK indicating connection permission, it transmits power information to the head end via the concentrator that has sent this ACK.

JP, 2014-155059, A

  In the power information collecting system (communication system) described in Patent Document 1, when the concentrator (master unit) receives a connection request from the smart meter (child unit), the MAC address indicated by the connection request is compared with the child unit list It was then decided whether to allow the connection. Therefore, when replacing or adding a smart meter, even if you try to connect a smart meter whose MAC address is not registered in the handset list to the concentrator, the MAC address is not registered in the handset list. I could not connect the smart meter.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a communication system, a network entry method , a parent device, an upper device, and a program that can enter a network even with a child device whose identification information is not registered in the parent device. I assume.

  The communication system of the present invention constitutes the network together with the slave unit and the slave unit permitted to enter the network among the one or more slave units that can communicate via the transmission path, and the entry into the network And a master unit for collecting information from the authorized slave unit, the slave unit having a first communication unit for communicating with the master unit through the transmission path, and a first control unit; The management information of the second communication unit communicating with the slave via the transmission path, the third communication unit communicating with the host apparatus, the second control unit, and identification information of the slave to be managed And the first control unit of the child device when the child device newly entering the network becomes communicable with the parent device via the transmission path. The identification information of the child device and the request to enter the network; Control the first communication unit to transmit to the second communication unit, and the second communication unit of the base unit receives the entry request and the identification information from the child unit, and transmits the entry request. If the identification information of the slave unit is included in the management information, the second control unit of the master unit permits entry of the slave unit, and the second communication unit of the master unit from the slave unit If the identification information of the slave unit that has received the entry request and the identification information and has sent the entry request is not included in the management information, the second control unit of the master unit is: The third communication unit is controlled to transmit a query signal to the host apparatus asking whether to permit the entry of the slave unit, and the third communication unit of the master unit responds to the query signal. When the second control unit receives the response signal from the upper apparatus, the second control unit Depending on, and determines whether to enter the handset which has transmitted the participation request.

  The network entry method according to the present invention is a network entry method in which a parent device determines whether or not to enter a child device into a network, and the child device newly enters the network, and is a method for entering the network via a transmission path. A step of receiving identification information of the child device and a request for entry into the network from the child device in a communicable state with the parent device, and storing identification information of the child device to be managed as management information The management information is read from the storage unit, and the identification information of the slave unit that has sent the entry request is compared with the management information, and the identification information of the slave unit that has sent the entry request is the If included in the management information, the step of permitting entry of the child device, and if the identification information of the child device that has sent the entry request is not included in the management information Transmitting an inquiry signal to a host apparatus inquiring whether or not to permit entry of a recorder, receiving a response signal to the inquiry signal from the host apparatus, and transmitting the entry request according to the response signal And determining the step of determining whether or not the child device is to be entered.

  The master unit according to the present invention includes identification information of the slave unit to be managed, a second communication unit communicating with the slave unit through the transmission path, a third communication unit communicating with the host apparatus, a second control unit, and the management target. An identification of the child device transmitted from the child device that has the first storage unit to be stored as management information and is a newly entered child device that has entered the network and has become communicable via a transmission path If the second communication unit receives the information and the request to enter the network, and the identification information of the slave unit that has transmitted the entry request is included in the management information, the second control The unit permits entry of the child device that has sent the entry request, and the second communication unit has received the entry request and the identification information from the child device and sent the entry request. If the identification information of the slave unit is not included in the management information, The second control unit controls the third communication unit to transmit an inquiry signal inquiring whether or not to permit the entry of the child device to the host device, and the third communication unit responds to the inquiry signal. When a signal is received from the upper-level device, the second control unit is configured to determine, according to the response signal, whether or not the child device that has transmitted the entry request is to be entered. I assume.

  The high-order device of the present invention comprises a fourth communication unit for communicating with a parent device, a third control unit, and a second storage unit for storing identification information of a child device to be managed as management information, [4] When the communication unit receives, from the parent device, a query signal inquiring whether or not to permit the entry of the child device, which has transmitted the entry request to the network to the parent device, the third control unit enters the entry The identification information of the slave unit that has sent the request is compared with the management information stored in the second storage unit, and the identification information of the slave unit that has sent the entry request is stored in the second storage unit If it is included in the management information, the fourth communication unit is controlled to transmit a response signal permitting the entry of the child device to the parent device, and the identification information of the child device that has sent the entry request is the information If it is not included in the management information stored in the second storage unit Characterized in that it is configured to control the fourth communication unit to transmit the entry Noriko for a response signal rejecting the master unit.

  The program of the present invention is a program for causing a computer to function as the above-mentioned parent device.

  According to the present invention, even a child device whose identification information is not registered in the parent device can enter the network.

It is a system configuration figure of a communication system of an embodiment. It is a sequence diagram explaining the operation | movement which makes a slave unit join a network in the communication system of embodiment. It is a sequence diagram explaining another operation of the communication system of an embodiment. It is a sequence diagram explaining another operation | movement of the communication system of embodiment.

  In the following embodiments, the consumption of resources at facilities of each customer was measured for consumers of resources such as power, gas, water, and heat supplied from an external supplier. A meter reading system for acquiring measurement data by a host device located at a remote place will be described as an example of a communication system. Although the case where a consumer's facility is a detached house is explained to an example below, not only this example but a consumer's facility may be each dwelling unit of an apartment house, an office, a factory, etc. In the following, although the case where the resource is electric power will be described as an example, the resource to be metered is not limited to electric power, and the consumption of resources other than electric power such as gas, water and heat is also an acquisition target of the higher-level device It is possible to

  As shown in FIG. 1, the communication system of the present embodiment includes a plurality of handsets 1 (101, 102, 103) and a master 2. The plurality of slaves 1 and the master 2 are respectively connected to the low voltage distribution line 83 to constitute a network (PAN: Personal Area Network). The communication system of the present embodiment further includes the upper device 3 that collects information from a plurality of handsets 1 via the base unit 2. In the following description, when each of the plurality of handsets 1 is described separately, the handset 101, handset 102, and handset 103 will be described, and the description common to the handsets 101, 102, and 103 will be described. When it is performed, it is described as a handset 1.

  The child device 1 is an watt-hour meter which is provided for each facility (a detached house in the present embodiment) of a customer and measures the consumption of power at the facility. The slave unit 1 of the present embodiment has a communication function for transmitting the result of measuring the consumption of power to the host device 3 which is a server of a supply enterprise (for example, an electric enterprise) (so-called smart meter) It is. Although three slaves 1 are connected to the master 2 in FIG. 1, the number of slaves 1 can be changed as appropriate.

  The slave unit 1 has a first control unit 11 and a first communication unit 12 as shown in FIG. The slave 1 further includes an identification information setting unit 13 and a meter reading unit 14.

  The first control unit 11 is configured of, for example, a microcomputer. The function of the first control unit 11 is realized by the microcomputer executing a program stored in a memory such as a ROM (Read Only Memory). The program may be stored in advance in a memory, or may be provided via a telecommunication line or in a state of being recorded on a recording medium.

  The first communication unit 12 is a communication modem that performs data communication with the parent device 2 by using the low voltage distribution line 83 as a transmission line and superimposing a carrier signal for communication on the low voltage distribution line 83. In the present embodiment, although the slave 1 and the master 2 communicate via a wired transmission path, the slave 1 and the master 2 may communicate via a wireless transmission path.

  The identification information setting unit 13 is, for example, a memory such as a ROM (Read Only Memory). The identification information setting unit 13 stores identification information such as a MAC address. The identification information setting unit 13 may be for the user to directly set individual identification information using, for example, a dip switch.

  The meter-reading unit 14 measures the amount of power consumed at the corresponding customer's facility (in this embodiment, a single-family dwelling unit). The slave unit 1 may store the amount of power, etc. measured by the probe unit 14 in the memory.

  The parent device 2 is installed, for example, for each pole transformer 82 to which the low voltage distribution line 83 is connected. The pole transformer 82 transforms a high voltage (for example, AC 6600 V) applied from a substation or the like to the high voltage distribution line 81 to a voltage (for example, AC 100 V / 200 V) used in general homes, Output. Typically, 10 to 20 customer facilities are connected to one pole transformer 82 via a low voltage distribution line 83. A handset 1 is provided at the facility of the customer, and the handset 1 measures the amount of power consumed at the facility of the customer. Among the plurality of handsets 1 connected to the low voltage distribution line 83, the base unit 2 configures the network 10 together with the handsets 1 that are permitted to enter the network 10. The parent device 2 of the present embodiment collects information (for example, measured value of electric energy etc.) from the child device 1 that is permitted to enter the network 10, and transmits the collected information to the upper device 3 (aggregation device) It is. The transformer for stepping down the high voltage applied to the high voltage distribution line 81 and outputting it to the low voltage distribution line 83 is not limited to the pole transformer 82, but may be a transformer installed in an electric room etc. It is also good.

  As shown in FIG. 1, the parent device 2 has a second control unit 21, a second communication unit 22, a third communication unit 23, and a first storage unit 24. Further, base unit 2 further includes setting unit 25.

  The second control unit 21 is configured of, for example, a microcomputer. The function of the second control unit 21 is realized by the microcomputer executing a program stored in a memory such as a ROM. This program may be stored in advance in a memory, or may be provided via a telecommunication line or in a state of being recorded on a recording medium.

  The second communication unit 22 is a communication modem that performs data communication with the slave 1 by using the low voltage distribution line 83 as a transmission line and superimposing a carrier signal for communication on the low voltage distribution line 83.

  The third communication unit 23 is connected to the host device 3 via a signal line 85 such as an optical fiber cable, for example, and performs data communication with the host device 3 via the signal line 85.

  The first storage unit 24 is, for example, an electrically rewritable nonvolatile memory such as an EEPROM (Electrically Erasable and Programmable Read Only Memory). The first storage unit 24 stores, as management information, identification information of the slave device 1 to be managed. This management information is, for example, information transmitted from the higher-level device 3. In the higher-level device 3, identification information of the child device 1 installed in each of a plurality of customer facilities is registered. The upper-level device 3 transmits, to the parent device 2, the identification information of the child device 1 to be managed by the parent device 2 as management information, and the management information is stored in the first storage unit 24 of the parent device 2. .

  The setting unit 25 is, for example, a switch such as a dip switch, and is used by a user (for example, a system administrator) to set whether or not to make the question operation effective. The question operation referred to here is an operation in which the parent device 2 transmits to the higher-level device 3 a question signal inquiring whether or not the entry of the child device 1 into the network 10 is permitted.

  The higher-level device 3 is a server (HES: Head End Server) that collects, from the parent device 2, information on the amount of power the parent device 2 has collected from the child device 1. Although only one parent device 2 is connected to the host device 3 in FIG. 1, a plurality of parent devices 2 may be connected to the host device 3.

  The host device 3 includes a third control unit 31, a fourth communication unit 32, and a second storage unit 33.

  The third control unit 31 is configured of, for example, a microcomputer. The function of the third control unit 31 is realized by the microcomputer executing a program stored in a memory such as a ROM. This program may be stored in advance in a memory, or may be provided via a telecommunication line or in a state of being recorded on a recording medium.

  The fourth communication unit 32 is connected to the base unit 2 via the signal line 85, and performs data communication with the base unit 2 via the signal line 85.

  The second storage unit 33 is an external storage device such as a magnetic disk device, for example. In the second storage unit 33, identification information of the slaves 1 managed by the master 2 is stored as management information for each master 2. That is, in the second storage unit 33, identification information of the slave 1 managed by the master 2 is stored as management information in association with identification information (for example, a MAC address or the like) of the master 2. In the case where the electric utility company newly installs handset 1 at the facility of the customer, or when replacing handset 1 installed at the facility of the customer, the second storage unit 33 of the higher-level device 3 The stored management information is updated by the electric power company.

  Next, in the communication system of the present embodiment, the process of determining whether or not the portable device 1 is to be entered into the network 10 will be described based on the sequence diagram of FIG. It is assumed that the question operation is set to be effective by the setting unit 25 of the master unit 2.

  For example, at the time of initial operation such as when power is supplied to the parent device 2, the second control unit 21 of the parent device 2 transmits a request signal for requesting transmission of management information to the higher-level device 3 Control 23 (S1). When the fourth communication unit 32 of the higher-level device 3 receives the request signal transmitted from the base unit 2, the third control unit 31 reads the management information from the second storage unit 33, and transmits this management information to the transmission source of the request signal. The fourth communication unit 32 is controlled to transmit data to the parent device 2 (S2). When the third communication unit 23 of the parent device 2 receives the management information transmitted from the higher-level device 3, the second control unit 21 stores the management information received by the third communication unit 23 in the first storage unit 24. (S3). The third control unit 31 of the higher-level device 3 may be configured to transmit management information to the parent device 2 when detecting that the parent device 2 is connected via the signal line 85.

  Thereafter, when the child device 101 to be entered into the network 10 is connected to the low voltage distribution line 83, the child device 101 becomes communicable with the parent device 2 through the low voltage distribution line 83. When the slave unit 101 becomes communicable with the master unit 2, the first control unit 11 of the slave unit 101 sends the identification information set by the identification information setting unit 13 and the entry request to the network 10 to the master unit 2. The first communication unit 12 is controlled to transmit (S4).

  When the second communication unit 22 of the master unit 2 receives the identification information and the entry request transmitted from the slave unit 101, the second control unit 21 of the master unit 2 determines the identification information of the slave unit 101 and the first storage unit 24. Whether or not to enter is judged by comparing the management information stored in the (S5). If the management information includes identification information of the child device 101, the second control unit 21 of the parent device 2 permits entry of the child device 101. The second control unit 21 of the master unit 2 assigns an address (network address) to be used in the network 10 to the slave unit 101, associates the address with the identification information, and stores the address in the first storage unit 24. The second control unit 21 of the master unit 2 controls the second communication unit 22 to transmit the transmission signal including the permission signal for permitting entry and the address assigned to the slave unit 101 to the slave unit 101 of the request source. To do (S6).

  When the first communication unit 12 of the slave unit 101 receives a transmission signal including the permission signal and the address from the master unit 2, the first control unit 11 of the slave unit 101 stores the address included in the transmission signal in the memory, Data communication with the base unit 2 is performed using this address. In the child machine 101 permitted to enter the network 10, when the meter reading unit 14 measures the amount of power consumed at the facility of the customer, the first control unit 11 measures the amount of power measured by the meter reading unit 14 as the parent machine The first communication unit 12 is controlled to transmit to the second communication unit 2. As a result, the parent device 2 can collect information (for example, information of power amount) from the child device 1 that has been permitted to enter the network 10, and can transmit the collected information to the higher-level device 3. Since the higher-level device 3 can collect information such as the amount of power from the plurality of handsets 1 via the parent device 2, it is possible to automatically read the amount of power consumed in the facilities of the plurality of customers. it can. Note that even if master device 2 transmits a request signal requesting transmission of data such as meter reading data to slave device 101 that has been permitted to enter network 10, slave device 101 causes data such as meter reading data to be transmitted. Good. Also, in response to a control command from the higher-level device 3, the master unit 2 transmits control data to the slave unit 101 that has been permitted to enter the network 10, and the slave unit 101 transmits the control data to the slave unit 101 made of a smart meter. The provided switch may be opened and closed.

  In addition, when another slave unit 102 is connected to the low voltage distribution line 83 and can communicate with the master unit 2, the first control unit 11 of the slave unit 102 determines the identification information set by the identification information setting unit 13. The first communication unit 12 is controlled to transmit the entry request and the entry request to the parent device 2 (S7). Here, the electric power company updates the management information held in the upper-level device 3 to include the identification information of the child device 102 in the management information in order to install the new child device 102 at the facility of the customer. It is assumed that the management information of the base unit 2 is not updated.

  When the second communication unit 22 of the master unit 2 receives the identification information and the entry request transmitted from the slave unit 102, the second control unit 21 of the master unit 2 determines the identification information of the slave unit 102 and the first storage unit 24. Whether or not to enter is determined by comparing the management information stored in (S8). The management information stored in the first storage unit 24 does not include the identification information of the child device 102, and the question operation of the parent device 2 is set to be effective by the setting unit 25. 2) The control unit 21 inquires of the higher-level device 3 whether or not entry of the handset 102 is permitted. That is, the second control unit 21 of the base unit 2 controls the third communication unit 23 to transmit an inquiry signal inquiring whether the entry of the handset 102 is permitted or not to the higher-level device 3 (S9).

  When the fourth communication unit 32 of the higher-level device 3 receives from the parent device 2 a query signal inquiring whether the portable device 102 can enter or not, the third control portion 31 of the higher-level device 3 determines Whether or not to enter is determined by comparing the management information stored in the storage unit 33 (S10). Here, since the management information stored in the second storage unit 33 includes the identification information of the slave unit 102, the third control unit 31 of the higher-level device 3 responds that the entry of the slave unit 102 is permitted. The fourth communication unit 32 is controlled to transmit a signal to the parent device 2 (S11).

  When the third communication unit 23 of the parent device 2 receives the response signal from the upper level device 3 after the transmission of the inquiry signal, the second control portion 21 of the parent device 2 determines the child based on the response signal from the upper level device 3 It is determined whether the aircraft 102 can enter. Here, since the response signal for permitting entry of the slave unit 102 is transmitted from the higher-level device 3, the second control unit 21 of the master unit 2 permits entry of the slave unit 102 and causes the slave unit 102 to transmit the network 10. Assign an address to use within. Then, the second control unit 21 of the master unit 2 transmits the transmission signal including the permission signal for permitting entry and the address assigned to the slave unit 102 to the slave unit 102 of the request source. Are controlled (S12).

  When the first communication unit 12 of the slave unit 102 receives a transmission signal including the permission signal and the address from the master unit 2, the first control unit 11 of the slave unit 102 stores the address included in the transmission signal in the memory, Data communication with the base unit 2 is performed using this address.

  Thereafter, when the slave 103 that should enter the network of another master is incorrectly connected to the low voltage distribution line 83, the slave 103 can communicate with the master 2 via the low voltage distribution line 83. . Note that a child machine 103 (a child connected to another network) is connected via a low voltage distribution line 83 to another pillar transformer 82 near the pole transformer 82 to which the parent machine 2 is connected. In some cases, the aircraft 103) can communicate with the master 2 via the pole transformer 82. When the slave unit 103 becomes communicable with the master unit 2, the first control unit 11 of the slave unit 103 sends the identification information set by the identification information setting unit 13 and the entry request to the network 10 to the master unit 2. The first communication unit 12 is controlled to transmit (S13). Here, since the child device 103 is a child device that should enter the network of another parent device, the identification information of the child device 103 is stored in the management information stored in the first storage unit 24 of the parent device 2. Is not included in the management information stored in the second storage unit 33 of the upper level device 3.

  When the second communication unit 22 of the master unit 2 receives the identification information and the entry request transmitted from the slave unit 103, the second control unit 21 of the master unit 2 determines the identification information of the slave unit 103 and the first storage unit 24. Whether or not to enter is determined by comparing with the management information stored in (S14). Since the management information stored in the first storage unit 24 does not include the identification information of the slave unit 103, the second control unit 21 of the master unit 2 inquires whether the entry of the slave unit 103 is permitted or not. The third communication unit 23 is controlled to transmit the question signal to the host device 3 (S15).

  When the fourth communication unit 32 of the higher-level device 3 receives from the parent device 2 a query signal inquiring whether the portable device 103 can enter or not, the third control portion 31 of the higher-level device 3 2 By comparing the management information stored in the storage unit 33, it is determined whether or not entry is possible (S16). Here, since the management information stored in the second storage unit 33 does not include the identification information of the slave unit 103, the third control unit 31 of the higher-level device 3 responds to the response signal for refusing entry of the slave unit 103. The fourth communication unit 32 is controlled to transmit the second communication unit to the base unit 2 (S17).

  When the third communication unit 23 of the parent device 2 receives the response signal from the upper level device 3 after the transmission of the inquiry signal, the second control portion 21 of the parent device 2 determines the child based on the response signal from the upper level device 3 It determines whether or not the aircraft 103 can enter. Since the response signal for refusing entry of the slave unit 103 is transmitted from the higher-level device 3, the second control unit 21 of the master unit 2 rejects entry of the slave unit 103 and does not assign the network address to the slave unit 103. . Then, the second control unit 21 of the master unit 2 controls the second communication unit 22 to transmit a transmission signal including a rejection signal for rejecting entry into the network 10 to the slave unit 103 of the request source (S18). ).

  When the first communication unit 12 of the slave unit 103 receives a transmission signal including a rejection signal from the master unit 2, the first control unit 11 of the slave unit 103 determines that entry into the network 10 is rejected. The slave unit 103 notifies the user that the entry into the network 10 has been refused by, for example, blinking a display lamp or ringing a buzzer.

  When the second control unit 21 of the master unit 2 refuses entry of the handset 103, the second control unit 21 may not transmit a rejection signal to the handset 103 which refuses entry. The child device 103 that has requested entry into the network 10 may determine that entry into the network 10 has been denied because it can not receive the permission signal within a predetermined time after transmitting the entry request. Also, if it is determined that entry is refused, the handset 103 that has requested entry into the network 10 retransmits the entry signal to the same base unit 2 after a predetermined wait time has elapsed, or another base unit, for example. The entry signal may be sent to

  By the way, when it is determined that the identification information of the slave unit 102 that has transmitted the entry request is not included in the management information in the determination of S8 described above, the setting unit 25 sets the question operation of the master unit 2 to invalid. If so, the second control unit 21 of the base unit 2 rejects the entry request of the handset 101. The second control unit 21 of the base unit 2 controls the second communication unit 22 to transmit a transmission signal including a rejection signal for rejecting entry into the network 10 to the slave unit 102 of the request source. As described above, when the setting unit 25 sets the inquiry operation of the base unit 2 to be invalid, the slave unit 1 in which the management information stored in the first storage unit 24 of the base unit 2 includes identification information Only will be allowed to enter the network 10.

  Here, the second control unit 21 of the base unit 2 may store the identification information of the handset 1 that has refused entry into the first storage unit 24 as non-permission information. Then, the second control unit 21 receives the entry request and the identification information from the handset 1 and stores the identification information of the handset 1 that has transmitted the entry request in the first storage unit 24 as non-permission information. If so, the entry of the handset 1 may be refused. This operation will be described according to the sequence diagram of FIG. FIG. 3 shows an operation in the case where the entry request is transmitted to the base unit 2 from the slave unit 104 in which the identification information is not included in the management information.

  When the slave unit 104 is connected to the low voltage distribution line 83, the slave unit 104 can communicate with the parent unit 2 via the low voltage distribution line 83. When the slave unit 104 becomes communicable with the master unit 2, the first control unit 11 of the slave unit 104 sends the identification information set by the identification information setting unit 13 and the entry request to the network 10 to the master unit 2. The first communication unit 12 is controlled to transmit (S20).

  When the second communication unit 22 of the master unit 2 receives the identification information and the entry request transmitted from the slave unit 104, the second control unit 21 of the master unit 2 determines the identification information of the slave unit 104 and the first storage unit 24. Whether to enter or not is determined by comparing the management information stored in the (S21). Since the management information stored in the first storage unit 24 does not include the identification information of the slave unit 104, the second control unit 21 of the master unit 2 inquires whether the entry of the slave unit 104 is permitted or not. The third communication unit 23 is controlled to transmit the question signal to the host device 3 (S22).

  When the fourth communication unit 32 of the higher-level device 3 receives a query signal inquiring whether the portable device 104 can enter or not from the main device 2, the third control portion 31 of the higher-level device 3 determines the identification information of the small device 104 and the second information Whether or not to enter is determined by comparing the management information stored in the storage unit 33 (S23). Here, since the management information stored in the second storage unit 33 does not include the identification information of the slave unit 104, the third control unit 31 of the higher-level device 3 responds to the response signal for refusing entry of the slave unit 104. The fourth communication unit 32 is controlled to transmit the second communication unit 32 to the base unit 2 (S24).

  When the third communication unit 23 of the parent device 2 receives the response signal from the upper level device 3 after the transmission of the inquiry signal, the second control portion 21 of the parent device 2 determines the child based on the response signal from the upper level device 3 It determines whether the aircraft 104 can enter. Since the response signal for rejecting entry of the slave unit 104 is transmitted from the higher-level device 3, the second control unit 21 of the master unit 2 rejects entry of the slave unit 104 and does not assign the network address to the slave unit 104. . In addition, the second control unit 21 of the base unit 2 stores the identification information of the handset 104 that has refused entry into the first storage unit 24 as non-permission information (S25). The second control unit 21 of the parent device 2 acquires non-permission information from the higher-level device 3 in communication with the higher-level device 3 at the time of initial operation (S2 in FIG. 2), and the non-permission information obtained from the higher-level device 3 May be stored in the first storage unit 24 (S3 in FIG. 2).

  Then, the second control unit 21 of the master unit 2 controls the second communication unit 22 to transmit a transmission signal including a rejection signal for refusing entry into the network 10 to the slave unit 104 of the request source (S26 ).

  Thereafter, when the identification information and the entry request are again transmitted from the same handset 104 to the base unit 2 (S27), the second communication unit 22 of the base unit 2 transmits the identification information and the entry request transmitted from the handset 104. Receive When the non-permission information is stored in the first storage unit 24 of the master unit 2, the second control unit 21 of the master unit 2 manages the identification information of the slave unit 104 in the management information stored in the first storage unit 24. Whether or not to enter is determined by comparison with the non-permission information (S28). Since the identification information of the slave unit 104 is registered as non-permission information in the first storage unit 24, the second control unit 21 of the master unit 2 does not have identification information of the slave unit 104 that has transmitted the entry request. Since it is included in the permission information, it is decided to refuse entry of the child device 104. Then, the second control unit 21 of the master unit 2 controls the second communication unit 22 to transmit a transmission signal including a rejection signal for rejecting entry into the network 10 to the slave unit 104 of the request source (S29) .

  As described above, the second control unit 21 of the base unit 2 stores the identification information of the handset 1 that has refused entry into the first storage unit 24 as non-permission information, and the handset 1 transmits the entry request. If this identification information is included in the disapproval information, entry of this handset 1 is refused. Therefore, the second control unit 21 of the parent device 2 enters the network 10 without inquiring of the higher-level device 3 whether or not entry is requested again from the child device 1 which has previously refused entry. It can be rejected. Note that the second control unit 21 of the master unit 2 sets the identification information of the handset 1 that has refused entry as the first storage unit as non-permission information until a predetermined validity period (for example, about one month) elapses. It may be stored in 24. Even if the child device 1 has refused entry, the parent device 2 can inquire of the upper device 3 whether entry is possible or not if the validity period has elapsed, so when the management information of the upper device 3 is changed Can decide whether to enter or not according to the management information after the change.

  The second control unit 21 of the master unit 2 stores the identification information of the slave unit 1 not to be managed in the first storage unit 24 in addition to the identification information of the slave unit 1 to be managed as management information. It is also good. When the second communication unit 22 of the master unit 2 receives the entry request and the identification information from the slave unit 1, the identification information of the slave unit 1 that has transmitted the entry request is managed as the identification information of the slave unit 1 to be managed If it is included in the information, the second control unit 21 permits the entry of the portable device 1. On the other hand, when the second communication unit 22 of the master unit 2 receives the entry request and the identification information from the handset 1, the identification information of the handset 1 that has transmitted the entry request identifies the handset 1 not to be managed If the information is included in the management information, the second control unit 21 rejects the entry of the handset 1.

  For example, an unintended handset 1 is registered in the network 10 by registering the identification information of the handset 1 used under the control of another base 2 in the management information as the identification information of the handset 1 not to be managed. It can reduce the possibility of being entered accidentally.

  By the way, in the communication system of the present embodiment, the third control unit 31 of the higher-level device 3 may control the fourth communication unit 32 to periodically transmit the management information to the parent device 2. In this case, the third communication unit 23 of the base unit 2 periodically receives the management information transmitted from the higher-level device 3. Then, the second control unit 21 of the base unit 2 causes the first storage unit 24 to store the management information received by the third communication unit 23 so that the management information stored in the first storage unit 24 is regularly stored. Update to Here, the parent device 2 may periodically obtain management information from the upper level device 3 by periodically requesting the upper level device 3 to transmit management information. Also, the host device 2 may periodically acquire management information from the host device 3 by the host device 3 voluntarily transmitting management information to the host device 2 periodically.

  In order to replace the slave unit 1 or add a new one, the slave unit 1 to be managed by the master unit 2 may be changed. Since the management information held in the first storage unit 24 of the parent device 2 is appropriately updated by the upper-level device 3 periodically transmitting the management information to the parent device 2, using the updated management information It is possible to determine whether or not the handset 1 can enter the network 10.

  Further, the communication system of the present embodiment may be provided with a setting device 5 connected to the parent device 2 for setting management information in the parent device 2. The setting device 5 includes a user interface such as an input unit and a display unit, and a communication function of communicating with the parent device 2 via the network 10. When the management information is set using the user interface of the setting device 5, the management information is transmitted to the parent device 2 by the communication function of the setting device 5 and registered in the first storage unit 24 of the parent device 2. Therefore, when replacing or newly establishing a handset 1, the setting device 5 is used to delete identification information of the handset 1 out of the management target from the management information, or a handset 1 to be newly managed Identification information can be added to the management information. The setting device 5 may perform wired communication with the parent device 2 via a wired transmission path such as a power line or may perform wireless communication.

  Further, when the third communication unit 23 receives the management information from the higher-level device 3, the second control unit 21 of the master unit 2 includes identification information in the management information in the handsets 1 that are permitted to enter. If there is an unassigned handset 1, processing may be performed to cause the handset 1 to leave the network 10. This operation will be described according to the sequence diagram of FIG.

  For example, at the time of initial operation such as when power is supplied to the base unit 2, the second control unit 21 of the base unit 2 transmits a request signal for requesting transmission of management information to the higher-level device 3 22 is controlled (S30). When the fourth communication unit 32 of the higher-level device 3 receives the request signal transmitted from the base unit 2, the third control unit 31 reads the management information from the second storage unit 33, and transmits this management information to the transmission source of the request signal. The fourth communication unit 32 is controlled to transmit data to the parent device 2 (S31). When the third communication unit 23 of the parent device 2 receives the management information transmitted from the higher-level device 3, the second control unit 21 stores the management information received by the third communication unit 23 in the first storage unit 24. (S32).

  Thereafter, when the entry request is transmitted from the child device 1 connected to the low voltage distribution line 83 to the parent device 2, processing is performed by the parent device 2 to determine whether or not to enter (S33). .About.110 enter the network 10 (S34, S35). In addition, description is abbreviate | omitted about the process of S33 in which the main | base station 2 judges the decision | availability of entry of the handset | sub_unit 1. As shown in FIG.

  The second control unit 21 of the parent device 2 transmits a request signal for requesting transmission of management information to the host device 3 when a predetermined update cycle (for example, a cycle of about 1 to several days) has elapsed. The unit 22 is controlled (S36). When the fourth communication unit 32 of the higher-level device 3 receives the request signal transmitted from the base unit 2, the third control unit 31 reads the management information from the second storage unit 33, and transmits this management information to the transmission source of the request signal. The fourth communication unit 32 is controlled to transmit to the parent device 2 (S37). When the third communication unit 23 of the parent device 2 receives the management information transmitted from the higher-level device 3, the second control unit 21 stores the management information received by the third communication unit 23 in the first storage unit 24. (S38).

  When the second control unit 21 of the parent device 2 acquires the management information from the higher-level device 3, the second control unit 21 of the parent device 2 can, based on the newly received management information, enter or not for each of the handsets 101 to 110 permitted to enter (S39). The second control unit 21 of the master unit 2 determines whether or not there is a slave unit 1 whose management information does not include identification information among the slave units 101 to 110 that are permitted to enter, and the management information includes If there is a handset 1 that does not contain identification information, processing for leaving the handset 1 from the network 10 is performed. For example, when the identification information of the slave unit 110 is removed from the management information, the second control unit 21 of the master unit 2 decides to withdraw the slave unit 110 from the network 10 and performs transmission including a withdrawal request from the network 10 The second communication unit 22 is controlled to transmit a signal to the slave 110 (S40). When the first communication unit 12 of the slave unit 110 receives a transmission signal including a withdrawal request from the master unit 2, the first control unit 11 of the slave unit 110 discards the address assigned by the master unit 2, and A process of leaving is performed (S41).

  As described above, when the management information is changed, the second control unit 21 of the parent device 2 is reviewing whether or not the child device 1 entering the network 10 can enter based on the changed management information. It is possible to correct the state in which the unintentionally-connected handset 1 is connected to the network 10.

  Further, in the present embodiment, even if the second control unit 21 of the master unit 2 controls the second communication unit 22 to transmit management information to all the slave units 1 that can communicate via the low-voltage distribution line 83. Good. Then, only when the first control unit 11 of the handset 1 determines that entry to the network 10 is possible based on the management information received by the first communication unit 12 from the base unit 2, the entry request can be made to the base unit 2 It may be sent to In this case, since the entry request is not transmitted from the handset 1 in which the management information does not contain the identification information, the entry request to the base unit 2 is from the handset 1 which is unlikely to be admitted to the network 10. It will not be sent. Therefore, the amount of communication between the parent device 2 and the child device 1 can be reduced, and the processing amount of tasks processed by the second control unit 21 of the parent device 2 can be reduced. In addition, when the handset 1 performs an active scan to check the state of the surrounding system before entry, and the master 2 transmits a beacon signal to the handset 1, the beacon signal includes management information and transmission You may In this case, the transmission of the beacon signal can also be used to transmit the management information, so the amount of communication between the master 2 and the slave 1 can be reduced.

  As described above, the communication system of the present embodiment includes the handset 1 and the base unit 2. The master unit 2 configures the network 10 together with the slave unit 1 permitted to enter the network 10 among the one or more slave units 1 capable of communicating via the transmission line (in the present embodiment, the low voltage distribution line 83) Collect information from handset 1 that has been granted entry to 10 The slave unit 1 includes a first communication unit 12 that communicates with the master unit 2 via a transmission path, and a first control unit 11. The master unit 2 includes a second communication unit 22 that communicates with the slave unit 1 via the transmission path, a third communication unit 23 that communicates with the host apparatus 3, a second control unit 21, and the slave unit 1 to be managed. And a first storage unit 24 that stores identification information as management information. When the handset 1 newly entering the network 10 becomes communicable with the master 2 via the transmission path, the first control unit 11 of the handset 1 transmits the identification information of the handset 1 to the network 10. The first communication unit 12 is controlled to transmit the entry request to the parent device 2. If the second communication unit 22 of the parent device 2 receives the entry request and the identification information from the child device 1 and the identification information of the child device 1 that has sent the entry request is included in the management information, the parent The second control unit 21 of the device 2 permits entry of the child device 1. If the second communication unit 22 receives the entry request and the identification information from the handset 1 and the identification information of the handset 1 is not included in the management information, the second control unit 21 The third communication unit 23 is controlled to transmit an inquiry signal inquiring whether or not to permit entry to the upper level device 3. When the third communication unit 23 of the master unit 2 receives a response signal to the inquiry signal from the higher-level device 3, the second control unit 21 makes the child unit 1 that has transmitted the entry request enter according to the response signal Decide.

  As described above, in the communication system according to the present embodiment, the second control unit 21 of the master unit 2 transmits the entry request to the identification information of the slave unit 1 and the management information stored in the first storage unit 24. Whether to enter or not is judged by comparing. Then, if the identification information of the handset 1 that has sent the entry request is not included in the management information stored in the first storage unit 24, the master unit 2 is inquiring of the higher-level device 3 about the entry availability. . Therefore, even if handset 1 does not include identification information in the management information stored in the first storage unit 24, if entry is permitted by the higher-level device 3, the master 2 may send the handset 1 to the network 10. Can be That is, even the handset 1 whose identification information is not registered in the parent device 2 can enter the network 10. Further, in comparison with the case where the parent device 2 transmits the entry request from all the child devices 1 to the higher-level device 3 and makes the upper-level device 3 determine whether or not to enter, between the parent device 2 and the high-level device 3 The time required to determine whether or not to enter can be reduced because the time required for communication is eliminated.

  In the communication system of the present embodiment, the third communication unit 23 periodically receives management information from the higher-level device 3, and the second control unit 21 receives the management information received by the third communication unit 23 as the first storage unit 24. The management information stored in the first storage unit 24 may be periodically updated by storing the information in the storage unit.

  As a result, even if the slave unit 1 to be managed by the master unit 2 is changed due to replacement or new establishment of the slave unit 1 or the like, the management information is periodically updated. It is possible to appropriately determine whether or not to enter.

  In the communication system of the present embodiment, when the second communication unit 22 receives an entry request from the child device 1 whose identification information is not included in the management information, the question operation for transmitting the question signal to the higher-level device 3 is made effective. The master unit 2 may further include a setting unit 25 that sets whether or not to do so. When the second communication unit 22 receives the entry request and the identification information from the handset 1 and the identification information of the handset 1 that has transmitted the entry request is not included in the management information, the setting unit 25 makes a question If the operation is set to be valid, the second control unit 21 controls the third communication unit 23 to transmit an inquiry signal to the higher-level device 3. Then, the second control unit 21 determines, according to the response signal to the inquiry signal, whether or not to enter the child device that has transmitted the entry request. In addition, when the second communication unit 22 receives the entry request and the identification information from the handset 1 and the identification information of the handset 1 that has transmitted the entry request is not included in the management information, the setting unit 25. If the question operation is set to be invalid at step 2, the second control unit 21 rejects entry of the handset 1 that has sent the entry request.

  As a result, if the setting unit 25 sets the question operation as invalid, whether or not entry of the handset 1 is possible is determined only by the base unit 2, so whether or not entry of the handset 1 is possible is determined in the higher-level device 3 There is no processing, and the amount of processing of tasks processed by the higher-level device 3 decreases. In addition, the time taken for communication between the parent device 2 and the upper level device 3 is eliminated, and it is possible to judge in a short time whether or not to enter.

  In the present embodiment, the second control unit 21 may cause the first storage unit 24 to store, as non-permission information, identification information of the handset 1 that has refused entry. The second control unit 21 receives the entry request and the identification information from the handset 1 and stores the identification information of the handset 1 that has transmitted the entry request in the first storage unit 24 as non-permission information. For example, the entry of the handset 1 is rejected.

  Thereby, when the parent device 2 receives the entry request again from the child device 1 which has previously refused entry, the host device 2 may refuse entry of the child device 1 without inquiring the host device 3 whether or not to enter. Can.

  In the present embodiment, even if the second control unit 21 causes the first storage unit 24 to store, as the management information, the identification information of the slave 1 not to be managed in addition to the identification information of the slave 1 to be managed. Good. When the second communication unit 22 receives the entry request and the identification information from the handset 1, the identification information of the handset 1 that has transmitted the entry request is used as the identification information of the handset 1 that is not to be managed. If included, the second control unit 21 may be configured to refuse entry of the handset 1.

  As a result, the master unit 2 refuses to enter the slave units 1 not to be managed, and it becomes difficult for the unintended slave unit 1 to enter the network 10.

  In the present embodiment, when the third communication unit 23 receives management information from the higher-level device 3, the second control unit 21 of the master unit 2 identifies management information in the handsets 1 that are permitted to enter. If there is a handset 1 that does not contain information, processing may be performed to cause the handset 1 to leave the network.

  As a result, when the slave device 1 to be managed is changed, it is possible to review the possibility of entry for each of the participating slave devices 1 according to the management information after the change.

  The communication system of the present embodiment may further include a setting device 5 connected to the parent device 2 for setting management information in the parent device 2.

  This makes it possible to set management information directly on the parent device 2 using the setting device 5.

  In the present embodiment, the second control unit 21 of the master unit 2 controls the second communication unit 22 so as to transmit management information to all the slave units 1 that can communicate via the transmission line (low voltage distribution line 83). You may The first control unit 11 of the slave unit 1 transmits the entry request to the master unit 2 only when it is determined that entry to the network 10 is possible based on the management information received from the master unit 2 by the first communication unit 12. The first communication unit 12 may be controlled to do this.

  As a result, since the entry request is not transmitted from the child device 1 which is unlikely to be able to enter the network 10 to the parent device 2, the processing amount of the task processed by the second control unit 21 of the parent device 2 is reduced. The amount of communication between 2 and handset 1 decreases.

  In addition, the network entry method in which the master unit 2 determines whether or not the slave unit 1 is to be entered into the network 10 is characterized by including the following steps. Step 1 is identification of the child device 1 from the child device 1 which is a child device 1 newly entering the network 10 and capable of communicating with the parent device 2 via the transmission line (low voltage distribution line 83) It is a step of receiving information and a request to enter the network 10. Another step reads the management information from the storage unit (first storage unit 24) that stores the identification information of the slave device 1 to be managed as management information, and identifies the identification information and management information of the slave device 1 that has transmitted the entry request. And the step of comparing. Another step is a step of permitting entry of the handset 1 if the identification information of the handset 1 that has transmitted the entry request is included in the management information. In another step, if the identification information of the handset 1 that has sent the entry request is not included in the management information, a step of sending a query signal asking whether to permit the entry of the handset 1 to the upper device 3 It is. Another step is a step of receiving a response signal to the inquiry signal from the higher-level device 3 and determining whether to make the child device 1 that has transmitted the entry request enter according to the response signal.

  Also according to this network entry method, the parent device 2 determines whether or not entry is possible by comparing the identification information of the child device 1 that has sent the entry request with the management information stored in the storage unit. Then, if the identification information of the child device 1 that has transmitted the entry request is not included in the management information stored in the storage unit, the parent device 2 inquires of the higher-level device 3 whether the entry is possible. Therefore, even if the child device 1 does not include identification information in the management information stored in the storage unit, the parent device 2 causes the child device 1 to enter the network 10 if entry is permitted by the higher-level device 3 be able to. That is, even the handset 1 whose identification information is not registered in the parent device 2 can enter the network 10. Further, in comparison with the case where the parent device 2 transmits the entry request from all the child devices 1 to the higher-level device 3 and makes the upper-level device 3 determine whether or not to enter, between the parent device 2 and the high-level device 3 The time required to determine whether or not to enter can be reduced because the time required for communication is eliminated. In addition, the network entry method of this embodiment can employ | adopt suitably the various entry methods which the communication system demonstrated by said embodiment employ | adopted in order to permit or refuse entry of the subunit | mobile_unit 1. FIG.

  Further, the slave unit 1 of the present embodiment is the slave unit 1 used in the above communication system, and the first communication unit 12 that communicates with the master unit 2 via the transmission path (low voltage distribution line 83), A control unit 11 and an identification information setting unit 13 for setting identification information. When it becomes possible to communicate with the master unit 2 via the transmission path in order to newly enter the network 10, the first control unit 11 transmits the identification information set by the identification information setting unit 13 and a request for participation in the network. To control the first communication unit 12 so as to transmit to the parent device 2. When entry into the network 10 is permitted by the parent device 2, the first control unit 11 controls the first communication unit 12 to transmit information to the parent device 2.

  The mobile device 1 of the present embodiment is used in the above-described communication system, and therefore can enter the network 10 if the upper device 3 permits the entry. That is, even the handset 1 whose identification information is not registered in the parent device 2 can enter the network 10. In addition, the child machine 1 of this embodiment can employ | adopt suitably each structure with which the child machine 1 is provided in the communication system demonstrated by said embodiment.

  Also, the master unit 2 of the present embodiment includes a second communication unit 22 that communicates with the slave unit 1 via the transmission line (low voltage distribution line 83), a third communication unit 23 that communicates with the higher-level device 3, and The control unit 21 includes a first storage unit 24 that stores identification information of the slave device 1 to be managed as management information. The identification information of the child device 1 transmitted from the child device 1 which is a child device 1 newly entering the network 10 and is in a communicable state via the transmission path and the request for entering the network 10 are the second It is received by the communication unit 22. If the second communication unit 22 receives the identification information and the entry request transmitted from the child device 1 and the identification information of the child device 1 that has sent the entry request is included in the management information, the second control The section 21 permits entry of the child device that has sent the entry request. If the second communication unit 22 receives the entry request and the identification information from the handset 1 and the identification information of the handset 1 that has sent the entry request is not included in the management information, the second control unit 21 The third communication unit 23 is controlled to transmit the interrogation signal to the host device 3. The inquiry signal is a signal for inquiring whether or not entry of the handset 1 is permitted. Then, when the third communication unit 23 receives a response signal to the inquiry signal from the higher-level device 3, the second control unit 21 responds to the response signal whether or not to enter the handset 1 that has transmitted the entry request. Configured to determine.

  As described above, in the base unit 2 of the present embodiment, the second control unit 21 compares the identification information of the handset 1 that has transmitted the entry request with the management information stored in the first storage unit 24. To decide whether or not to enter. Then, if the identification information of the handset 1 that has sent the entry request is not included in the management information stored in the first storage unit 24, the master unit 2 is inquiring of the higher-level device 3 about the entry availability. . Therefore, even if handset 1 does not include identification information in the management information stored in the first storage unit 24, if entry is permitted by the higher-level device 3, the master 2 may send the handset 1 to the network 10. Can be That is, even the handset 1 whose identification information is not registered in the parent device 2 can enter the network 10. Further, in comparison with the case where the parent device 2 transmits the entry request from all the child devices 1 to the higher-level device 3 and makes the upper-level device 3 determine whether or not to enter, between the parent device 2 and the high-level device 3 The time required to determine whether or not to enter can be reduced because the time required for communication is eliminated. In addition, the parent device 2 of this embodiment can employ | adopt suitably each structure with which the parent device 2 is provided in the communication system demonstrated by said embodiment.

  Further, the program according to the present embodiment is a program that causes a computer to function as the above-described base unit 2 by being executed by the computer.

  In the base unit 2 realized by the computer executing this program, the second control unit 21 transmits the entry request, the identification information of the handset 1 and the management information stored in the first storage unit 24. Whether to enter or not is judged by comparing Then, if the identification information of the handset 1 that has sent the entry request is not included in the management information stored in the first storage unit 24, the master unit 2 is inquiring of the higher-level device 3 about the entry availability. . Therefore, even if handset 1 does not include identification information in the management information stored in the first storage unit 24, if entry is permitted by the higher-level device 3, the master 2 may send the handset 1 to the network 10. Can be That is, even the handset 1 whose identification information is not registered in the parent device 2 can enter the network 10. Further, in comparison with the case where the parent device 2 transmits the entry request from all the child devices 1 to the higher-level device 3 and makes the upper-level device 3 determine whether or not to enter, between the parent device 2 and the high-level device 3 The time required to determine whether or not to enter can be reduced because the time required for communication is eliminated. Note that this program is provided through a telecommunication line such as the Internet, and may also be provided by a computer readable storage medium. The program of the present embodiment may be created so that each component of the master unit 2 can be realized in the communication system described in the above-described embodiment by the computer executing this program.

  In addition, the upper-level device 3 of the present embodiment stores management information including identification information of the fourth communication unit 32 for communicating with the parent device 2, the third control unit 31, and the child device 1 to be managed. And a second storage unit 33. When the fourth communication unit 32 receives, from the parent device 2, a query signal inquiring whether the child device 1 has transmitted the entry request to the network 10 to the parent device 2 and whether to permit the entry of the child device 1 into the network 10. The control unit 31 compares the identification information of the slave unit that has transmitted the entry request with the management information. The third control unit 31 controls the fourth communication unit to transmit a response signal to permit the entry of the child device if the identification information of the child device that transmitted the entry request is included in the management information. . The third control unit 31 controls the fourth communication unit to transmit a response signal to reject the entry of the child device if the identification information of the child device that has sent the entry request is not included in the management information. .

  Thus, when the fourth communication unit 32 of the higher-level device 3 receives an inquiry signal from the base unit 2, the third control unit 31 determines whether or not the mobile unit 1 can join, and transmits a response signal to the base unit 2 Thus, the fourth communication unit 32 is controlled. Therefore, if entry is permitted by the higher-level device 3, the base unit 2 can cause the handset 1 to enter the network 10. That is, even the handset 1 whose identification information is not registered in the parent device 2 can enter the network 10. Further, the amount of communication between the upper apparatus 3 and the base apparatus 2 is reduced, and the upper apparatus 3 processes as compared to the case where the upper apparatus 3 determines whether or not all the portable apparatuses 1 can enter the network 10. The amount of task processing also decreases. Note that the host device 3 of the present embodiment can appropriately adopt each configuration provided in the host device 3 in the communication system described in the above embodiment.

1 slave unit 2 master unit 3 host device 10 network 11 first control unit 12 first communication unit 13 identification information setting unit 21 second control unit 22 second communication unit 23 third communication unit 24 first storage unit (storage unit)
25 setting unit 31 third control unit 32 fourth communication unit 33 second storage unit 83 low voltage distribution line (transmission line)
1, 101 to 104, 110 handsets

Claims (12)

With handset
Among the one or more slaves that can communicate via a transmission path, a parent that collects the information from the slaves that has configured the network together with the slave that has been permitted to enter the network Equipped with
The slave unit includes a first communication unit that communicates with the master unit via the transmission path, and a first control unit.
The master unit identifies the identification information of the slave unit to be managed, a second communication unit communicating with the slave unit via the transmission path, a third communication unit communicating with the host apparatus, a second control unit, and And a first storage unit for storing information as management information;
When the child device newly entering the network becomes communicable with the parent device via the transmission path, the first control unit of the child device receives the identification information of the child device and the network. Controlling the first communication unit to transmit an entry request to the parent device;
The management information includes the identification information of the slave unit which has received the entry request and the identification information from the slave unit and the second communication unit of the master unit has transmitted the entry request. Then, the second control unit of the master unit permits entry of the slave unit,
The management information includes the identification information of the slave unit which has received the entry request and the identification information from the slave unit and the second communication unit of the master unit has transmitted the entry request. If not, the second control unit of the master unit controls the third communication unit to transmit a query signal inquiring whether the entry of the slave unit is permitted or not to the host device,
When the third communication unit of the master unit receives a response signal to the inquiry signal from the upper apparatus, the second control unit joins the slave unit that has transmitted the entry request in response to the response signal. A communication system characterized by determining whether or not to The third communication unit periodically receives the management information from the host device;
The second control unit may periodically update the management information stored in the first storage unit by storing the management information received by the third communication unit in the first storage unit. The communication system according to claim 1, characterized in that it is configured. Whether the question operation of transmitting the question signal to the higher rank apparatus is enabled when the second communication unit receives the entry request from the child device that does not include the identification information in the management information The master unit further includes a setting unit for setting
When the second communication unit receives the entry request and the identification information from the child device, and the identification information of the child device that has sent the entry request is not included in the management information. If the question operation is set to be valid in the setting unit, the second control unit controls the third communication unit to transmit the question signal to the host device, and the response to the question signal is performed. It is determined whether or not the child unit that has sent the entry request is to be entered according to the signal,
When the second communication unit receives the entry request and the identification information from the child device, and the identification information of the child device that has sent the entry request is not included in the management information. The second control unit is configured to reject entry of the child device that has sent the entry request, if the setting operation sets the question operation as invalid. Or the communication system as described in 2. The second control unit causes the first storage unit to store, as non-permission information, the identification information of the child device that has refused entry.
The second control unit receives the entry request and the identification information from the child device, and the identification information of the child device that has sent the entry request is the first storage unit as the non-permission information. The communication system according to any one of claims 1 to 3, wherein the communication system according to any one of claims 1 to 3 is configured to refuse entry of the child device if stored in the device. The second control unit causes the first storage unit to store, as the management information, the identification information of the child device not to be managed, in addition to the identification information of the child device to be managed.
When the second communication unit receives the entry request and the identification information from the child device, the identification information of the child device that has transmitted the entry request is the identification of the child device not to be managed The communication according to any one of claims 1 to 4, wherein the second control unit is configured to reject entry of the slave if the information is included in the management information. system. When the third communication unit receives the management information from the upper-level device, the second control unit of the master unit stores the identification information in the management information in the slave unit that is permitted to enter. The communication system according to any one of claims 1 to 5, wherein if there is the slave unit not included, processing for causing the slave unit to leave the network is performed.   The communication system according to any one of claims 1 to 6, further comprising a setting device connected to the parent device for setting the management information in the parent device. The second control unit of the master unit controls the second communication unit to transmit the management information to all the slaves that can communicate via the transmission path.
Only when the first control unit of the slave unit determines that entry to the network is possible based on the management information received from the master unit by the first communication unit, the master unit requests the entry request as the master unit The communication system according to any one of claims 1 to 7, characterized in that the first communication unit is controlled to transmit to the network. A network entry method in which a parent device decides whether or not to enter a child device into the network,
The child device newly entering the network and receiving identification information of the child device and a request for joining the network from the child device in a state capable of communicating with the parent device via a transmission path Step and
Reading the management information from a storage unit that stores identification information of the child device to be managed as management information, and comparing the identification information of the child device that has transmitted the entry request with the management information;
Allowing entry of the child device if the identification information of the child device that has sent the entry request is included in the management information;
Sending an inquiry signal asking whether or not to permit entry of the child device to the host device if the identification information of the child device that has sent the entry request is not included in the management information;
Receiving a response signal to the interrogation signal from the host device, and determining whether to enter the slave unit that has transmitted the entry request according to the response signal. Entry method.   A second communication unit for communicating with a slave via a transmission path, a third communication unit for communicating with a host apparatus, a second control unit, and storage of identification information of the slave to be managed as management information And a storage unit,
  The second communication includes the identification information of the child device transmitted from the child device, which is the child device newly entering the network and is in a communicable state via the transmission path, and the request for entering the network And the second control unit transmits the entry request if the identification information of the slave unit received by the unit and having transmitted the entry request is included in the management information. Allow entry
  If the second communication unit receives the entry request and the identification information from the child device and the identification information of the child device that has sent the entry request is not included in the management information. The second control unit controls the third communication unit to transmit, to the upper apparatus, a query signal inquiring whether to permit the entry of the child device.
  When the third communication unit receives a response signal to the interrogation signal from the higher-level device, whether the second control unit causes the child device that has transmitted the entry request to enter in response to the response signal Was configured to determine
A parent machine characterized by   A fourth communication unit for communicating with the parent device, a third control unit, and a second storage unit that stores identification information of a slave device to be managed as management information;
  When the fourth communication unit receives, from the parent device, a query signal inquiring whether or not to permit the child device to enter the network, the third communication unit transmitting a request for entering the network to the parent device, The identification information of the slave unit that has transmitted the entry request is compared with the management information stored in the second storage unit, and the identification information of the slave unit that has sent the entry request is stored in the second storage unit If it is included in the management information, the fourth communication unit is controlled to transmit a response signal permitting the entry of the child device to the parent device, and identification information of the child device that has sent the entry request The fourth communication unit is configured to control the fourth communication unit to transmit a response signal to the parent device, which rejects entry of the child device if the management information stored in the second storage unit is not included in the management information The
An upper-level device characterized by   A program for causing a computer to function as a parent device according to claim 10.

Images