KR20050091365A - A power line communication based service addition type power line communication system and a method having function of security and attestation - Google Patents

Abstract

The present invention relates to a service-added power line communication system based on power line communication with security and authentication functions, and a method thereof. The present invention relates to a meter gateway and a local information control device that perform data transmission and reception through a power line based subscriber network. In the power line communication system, a data encryption / decryption is independently performed by using a private encryption key assigned to each meter gateway when data is transmitted and received between the local information controller and the meter gateway. You can strengthen it. Accordingly, it is possible to stably prevent the leakage and manipulation of data, such as unauthorized communication devices or facilities that illegally connect to the subscriber network and distort or acquire information of the subscriber according to a legal method or procedure.

Description

Service-added power line communication system based on power line communication with security and authentication function and its method {A POWER LINE COMMUNICATION BASED SERVICE ADDITION TYPE POWER LINE COMMUNICATION SYSTEM AND A METHOD HAVING FUNCTION OF SECURITY AND ATTESTATION}

The present invention relates to a service-added power line communication system and method thereof based on power line communication having security and authentication functions. In particular, the present invention relates to a power line capable of enhancing meter data and service data security in a subscriber network based on a power line communication network. A service-added power line communication system based on communication and a method thereof are provided.

In general, power line communication (PLC) refers to a method of transmitting voice and data signals at high speed by superimposing high frequency signals on low voltage or high voltage distribution lines installed indoors and outdoors. In particular, with the desire to intelligently control the customer's facilities, the demand for connecting information appliances such as TV (TeleVision), computers, camcorders, etc. installed in the consumer has increased along with the development of information devices. High-speed power line communication research is actively conducted in the field.

Recent advances in powerline communication modem technology enable high-speed transmission of several Mbbs, and another new capability to compete with asymmetric digital subscriber line (ADSL) over telephone lines or cable modems with coaxial cables. It is emerging as an access network. Therefore, when the development of such power line communication technology is commercialized, the network can be directly used for the advancement of power information such as automatic meter reading (AMR) and power distribution automation in the power business aspect, and by providing high-speed information transmission service such as internet (internet) We expect line rental revenue to be expected.

As described above, in the power line communication, as well as convenience of network connection as well as wireless communication, high-speed bidirectional communication is being attempted to add an additional service function in addition to the remote meter reading. Here, the additional service refers to service data and content data provided through a data communication network. However, the technology for adding an additional service function in addition to the remote meter reading in power line communication is still insufficient, and there are no alternatives related to meter reading, security, authentication, management, and operation according to the provision of the additional service.

Accordingly, the present invention has been made to solve the above problems, and provides an additional service in addition to the remote meter reading based on the power line communication network, and to communicate with each other through the subscriber network by strengthening the data security according to the remote meter reading and additional service provision The purpose is to prevent leakage and manipulation of data transmitted and received between the meter gateway and the local information controller.

According to an aspect of the present invention for realizing the above object, in the power line communication system including a local information control device for performing data transmission and reception through a power line-based subscriber network and a plurality of meter gateways, When transmitting and receiving data between the area information control device and the plurality of meter gateways in a subscriber network, the area information control device independently decrypts and decrypts data using a private encryption key registered for each of the plurality of meter gateways. A service-added power line communication system for performing data transmission and reception with a corresponding meter gateway is provided.

In addition, according to another aspect of the present invention for realizing the above object, and performs a power line communication with the plurality of terminals through a home network based on the plurality of terminals installed in each customer and the power line installed in the customer and And an indoor information control device for providing an interface with a subscriber, and one for each customer to perform power line communication with the plurality of terminals through the indoor network, and request a service according to the request of the indoor information control device. And a plurality of meter gateways, each of which has a unique identification ID and a corresponding private encryption key registered therein, and a subscriber network based on power line communication in which the plurality of meter gateways are commonly connected. And identification ID and private arm of the multiple meter gateways The subscriber station network includes a local information control device in which all keys are registered, and an external server that performs data communication through the local information control device and a data communication network and provides a service corresponding to a service request of the meter gateway. When data is transmitted and received between the plurality of meter gateways and the local information control device, the local information control device independently decrypts and decrypts data using a private encryption key registered for each of the plurality of meter gateways. A service-added power line communication system performing data transmission and reception with a gateway is provided.

In addition, according to another aspect of the present invention for realizing the above object, the private ID corresponding to the identification ID and the identification ID to the plurality of meter gateways and the local information control device connected to the plurality of meter gateways and subscriber networks Registering an encryption key, and the meter gateway encrypts the identification ID and the message using the corresponding private encryption key, and then receives the first data including the unencrypted identification ID, the encrypted identification ID, and the message. Transmitting the data to the local information controller through the local information controller, and receiving the first data transmitted from the meter gateway, and encrypting the first data transmitted using the private encryption key. A service-added power line communication room comprising decrypting the identification ID and the message. It provides.

Further, according to another aspect of the present invention for realizing the above object, the identification ID and the private ID corresponding to the plurality of meter gateways and the local information control device connected to the plurality of meter gateways and subscriber networks Registering an encryption key, and transmitting the second data to the corresponding meter gateway by encrypting data to be transmitted by using the private encryption key of the corresponding meter gateway; Receiving the second data transmitted from the local information control device, and providing a service-added power line communication method comprising the step of decrypting the second data using the corresponding private encryption key.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the preferred embodiments disclosed below, but can be implemented in various different forms, only this embodiment is intended to complete the disclosure of the present invention and to those skilled in the art the scope of the invention It is provided to inform you completely.

1 is an overall configuration diagram of a service-added power line communication system according to a preferred embodiment of the present invention, Figure 2 is a view showing a subscriber network and a home network of the service-added power line communication system shown in FIG. Here, the subscriber network is a network made through the outdoor incoming line 80, the home network refers to a network made through the indoor incoming line (90).

1 and 2, a service-added power line communication system according to a preferred embodiment of the present invention includes a local information control device 50 for performing high-speed bidirectional communication with an external server through a data communication network 40, and the local area. Meter gateways M1 to Mm that perform high-speed power line communication through the information control device 50 and the outdoor leader line 80, and the meter gateways M1 to Mm and the indoor leader line 90 in the house. The indoor information control device (D1 to Dm) for performing the high-speed power line communication through, and the indoor information control device (D1 to Dm) and a plurality of terminals (T1 to Tn) for performing high-speed power line communication in the home.

[External server]

The external server includes a power provider server 10, a network operator server 20, and a plurality of service provider servers 30, and the data communication network 40 (e.g., based on Transmission Control Protocol / Internet Protocol) (TCP / IP). , Broadband integrated network, wide area network, Internet, premises information network, etc.) to perform a high-speed two-way communication with a plurality of local information control device 50. The power provider server 10, the network provider server 20, and the service provider server 30 are interconnected through a data communication network 40 or other communication network.

The power service provider server 10 receives a power reading amount of each customer H1 to Hm from the local information control device 50 through the data communication network 40 in real time. Here, the power meter reading amount refers to the amount of power used by each consumer H1 to Hm. The power provider server 10 sets and charges a power usage fee for each customer H1 to Hm based on the amount of power reading provided from the local information controller 50. Here, as the power meter reading amount of the total amount of power used by the monthly, weekly, nightly, date, time zone of all the customers (H1 to Hm) assigned to one local information control device 50, each customer (H1 to Hm) monthly, daytime, nightly, date, time of day can be used such as the amount of power and instantaneous power.

The network operator server 20 receives a service reading amount of each customer H1 to Hm from the local information control device 50 through the data communication network 40 in real time. Here, the service meter reading amount includes a service / content type used by the subscriber, a service / content usage time, and a service / content usage amount. The network operator server 20 sets and charges a service fee for each customer H1 to Hm based on the service reading amount provided from the local information controller 50. Here, the service meter reading amount may include the service usage time and the type of service / content used, service / content usage, and frequency of use of content by monthly, weekly, nightly, date, and time zone of each customer (H1 to Hm). have.

The plurality of service provider servers 30 provide service / content data to the respective meter gateways M1 to Mm through the data communication network 40 corresponding to the service model of each service company. That is, the service provider server 30 provides corresponding service / content data when there is a request for service / content data from each of the meter gateways M1 to Mm through the data communication network 40.

The external server may further include a gas / water service provider server (not shown) and a security management service provider server (not shown). The gas / water service provider server receives the gas / water meter reading amount of each customer H1 to Hm from the local information control device 50 through the data communication network 40 in real time. Here, the gas / water meter reading amount means the amount of gas used / water amount used in each water-soluble H1 to Hm. The gas / water service provider server sets and charges the gas / water use fee of each customer H1 to Hm based on the gas / water use amount provided from the local information controller 50. Here, as the gas / water meter reading amount, the sum of the monthly, weekly, nightly, date, and time zone usage amounts of all the customers (H1 to Hm) assigned to one local information control device 50, and each customer (H1) To Hm) may be used monthly, weekly, nightly, date, time zone. The security management service provider server is a server that manages the security of each customer (H1 to Hm), and receives an internal image of each customer (H1 to Hm) photographed through an IP camera, and charges the corresponding charge. .

In the following description, the power reading amount and gas / water reading amount provided from each of the meter gateways M1 to Mm will be referred to as meter reading data, and data provided from the service provider server 30, service / content data, and the like. The data will be named as service data.

[Regional Information Control Device]

The local information control device 50 is installed at least one for each access network to perform high-speed power line communication with all meter gateways M1 to Mm constituting the subscriber network. The local information control device 50 performs high-speed power line communication through the meter gateways M1 to Mm installed at each of the customers H1 to Hm and the outdoor lead wire 80. In addition, data communication is performed with an external server through the data communication network 40. Here, the outdoor lead wire 80 refers to a distribution line of 110 / 220V extending from the output terminal of the columnar transformer 60 and installed between the local information control device 50 and each of the meter gateways M1 to Mm.

The local information control device 50 receives meter reading data from the meter gateways M1 to Mm through the outdoor lead wire 80 and provides the power provider server 10 through the data communication network 40. At this time, the local information controller 50 temporarily stores the meter data transmitted from the meter gateways M1 to Mm in the data storage unit (see '530' in FIG. 3), and then from the power provider server 10. When the request signal for the meter reading data is received, the meter reading data stored in the data storage unit 530 is extracted and provided to the power service provider server 10 through the data communication network 40. In this manner, the local information controller 50 receives meter reading data from the meter gateways M1 to Mm and provides the gas / water company server through the data communication network 40. However, the local information control device 50 according to the preferred embodiment of the present invention is not limited thereto, and a request signal for a power reading amount or a gas / water reading amount from a power company server 10 or a gas / water supply company server. Even if there is no predetermined transmission time arrives, the power reading or the gas / water reading may be sequentially drawn out according to the predetermined time and provided through the data communication network 40.

In addition, the local information controller 50 connects the meter gateways M1 to Mm, the network operator server 20 and the service provider server 30 in real time (ON-line) through the data communication network 40. The local information controller 50 receives a signal for requesting an internet connection with the service provider server 30 from the meter gateways M1 through Mm. Perform internet access. As a result, the service provider server 30 provides service data to the meter gateways M1 to Mm.

In addition, the local information control apparatus 50 stores the identification IDs MID1 to MIDm of the respective meter gateways M1 to Mm and the private encryption keys K1 to Km corresponding to the data storage unit (530 in FIG. 3). And encrypted data is transmitted from the meter gateways M1 to Mm, and the encrypted data is decrypted using the private encryption keys K1 to Km. Here, the encrypted data provided from the meter gateways M1 to Mm refers to data encrypted using the private encryption keys K1 to Km.

As shown in FIG. 3, the local information controller 50 includes a power line communication module 510, a central processing unit 520, a data storage unit 530, a wired data communication module 540, and a wireless data communication module. The unit 550 and a power supply unit (not shown) for supplying power. Here, the power supply unit uses the supply power supplied through the outdoor lead wire (80).

The power line communication module unit 510 receives meter reading data from the outdoor leader line 80, and receives meter reading data transmitted from the data storage unit 530 and sends the meter reading data to the outdoor leader line 80. In addition, the power line communication module unit 510 receives the Internet access signal and other data from the outdoor incoming line 80, and wires the service data, the meter data request signal, and the control signal received from the wired data communication module unit 550. Received from the data communication module unit 550 and sent to the outdoor incoming line (80). The power line communication module unit 510 includes a power line coupler 511, a reception filter unit 512, a reception amplifier unit 513, a power line communication unit 514, a transmission filter unit 515, and a transmission amplifier unit 516. It includes.

The power line coupler 511 is connected to the outdoor lead wire 80 to detect and receive meter data, Internet connection signal and other data transmitted from the meter gateways M1 to Mm from the outdoor lead wire 80. Transmit to filter unit 512. The power line coupler 511 carries the service data, the request signal, and the control signal transmitted from the transmission amplifier 516 to the outdoor lead wire 80. The power line coupler 511 is configured to include a transformer (not shown) having a primary side connected to an outdoor lead wire 80 and a secondary side connected to a reception filter unit 512 and a transmission amplifier unit 516, respectively. In addition, a fuse, a varistor, a resistor, a zener diode, or the like may be appropriately configured to minimize noise.

The reception filter unit 512 and the reception amplifier unit 513 are data converters for converting a reception data signal, and the reception filter unit 512 may include noise included in the reception data signal transmitted from the power line coupler 511. The predetermined frequency band is filtered and transmitted to the reception amplifier 513. The reception amplifier 513 amplifies the reception data signal filtered and transmitted through the reception filter unit 512 at a predetermined amplification ratio, thereby power line. Transmit to communication unit 514.

The transmission filter unit 515 and the transmission amplifier unit 516 are data converters for converting a data signal for transmission, and the transmission filter unit 515 is a noise or predetermined signal included in the transmission data transmitted from the power line communication unit 514. The frequency band is filtered and transmitted to the transmission amplifier 516, and the transmission amplifier 516 amplifies the transmission data signal filtered and transmitted through the transmission filter 515 at a predetermined amplification ratio, thereby power supply coupler 511. To send.

The power line communication unit 514 is a modulation / demodulation module in which a chip for power line communication is embedded. As the modulation / demodulation method, orthogonal frequency division multiplexing (OFDM), code division multiple access (CDMA), or the like is used for high-speed communication. Can be. For example, the power line communication unit 514 demodulates a reception data signal, that is, an analog signal transmitted from the reception amplification unit 513, into a digital signal and transmits the demodulated data signal to the central processing unit 520. Then, the transmission data signal transmitted from the central processing unit 520, that is, the digital signal is modulated into an analog signal and transmitted to the transmission filter unit 515.

On the other hand, the wired data communication module unit 550 is a service data transmitted from the data communication network 40, meter reading request signal, control signal and security data of the power provider server 10, gas / water service provider server and security management service provider server Receive the request signal. The wired data communication module unit 550 transmits meter reading data to the power service provider server 10 and the gas / water service provider server through the data communication network 40 in response to the request signal. Then, the security data is transmitted to the security management service provider server. In addition, the wired data communication module unit 550 provides the service data, the request signal, and the control signal to the central processing unit 520. Data provided to the central processing unit 520 is transmitted to the outdoor tugboat 80 through the power line communication module unit 510. The wired data communication module unit 550 includes a wired communication port unit 551, a reception filter unit 552, a reception amplifier unit 553, a wired data communication unit 554, a transmission filter unit 556, and a transmission amplifier unit ( 555).

The wired communication port unit 551 is a port connected to the data communication network 40. The wired communication port unit 551 receives service data, a request signal, and a control signal transmitted from an external server through the data communication network 40 and transmits it to the reception filter unit 552. do. In addition, the meter reading data, the Internet access signal, and other data transmitted from the transmission amplifier 555 are transmitted to the external server through the data communication network 40.

The reception filter unit 552 and the reception amplifier unit 553 are data conversion units for converting a reception data signal, and the reception filter unit 552 is included in the reception data signal transmitted from the wired communication port unit 551. The noise or a predetermined frequency band is filtered and transmitted to the reception amplifier 553. The reception amplifier 553 amplifies the reception data signal filtered and transmitted through the reception filter 552 at a predetermined amplification ratio, thereby wired data. Transfer to the communication unit 554.

The transmission filter unit 556 and the transmission amplifying unit 555 are conversion units for converting a data signal for transmission, and the transmission filter unit 556 is a noise included in the transmission data signal transmitted from the wired data communication unit 554. The predetermined frequency band is filtered out and transmitted to the transmission amplifier 556. The transmission amplifier 555 amplifies the transmission data signal filtered and transmitted through the transmission filter 556 at a predetermined amplification ratio, thereby providing a wired communication port. Send to section 551.

The wired data communication unit 554 demodulates a reception data signal transmitted from the reception amplifier 553, that is, an analog signal into a digital signal, and transmits the demodulated signal to the central processing unit 520, or the transmission data transmitted from the central processing unit 520. The signal, that is, the digital signal is modulated into an analog signal and transmitted to the transmission filter unit 556.

On the other hand, the wireless data communication module unit 540 is a wireless infrared communication module unit, such as a PDA (Personal Digital Assistant), a notebook (notebook computer) or a remote control (remote control) in which an external device, for example, a wireless infrared communication device is embedded. As shown in FIG. 4, the mobile encryption key registration device receives the identification IDs MID1 to MIDm of the respective meter gateways M1 to Mm and the private encryption keys K1 to Km corresponding thereto, and receives the data storage unit 530. ). Here, the PDA, notebook, and remote control may be managed by the network operator. As an example, the remote controller 100 is illustrated in FIGS. 11 and 12, which will be described later. The wireless data communication module unit 540 may identify the identification IDs MID1 to MIDm and the private encryption keys K1 to Km, and the identification IDs MID1 to MIDm and the private encryption keys K1 stored in the data storage unit 530. To Km) to the encryption key registration device. The wireless data communication module unit 540 includes a wireless communication port unit 541, a reception filter unit 542, a reception amplifier unit 543, a wireless data communication unit 544, a transmission filter unit 545, and a transmission amplifier unit ( 546).

The wireless communication port unit 541 is a wireless infrared communication port and transmits identification IDs MID1 to MIDm and corresponding private encryption keys K1 to Km of the respective meter gateways M1 to Mm from the encryption key registration device. A receiving port (not shown) for receiving and transmitting to the receiving filter unit 542, and identification IDs MID1 to MIDm and private encryption keys K1 to Km transmitted from the transmission amplifying unit 546 are provided to the encryption key registration device. And a transmission port (not shown). Herein, the encryption key registration device is a device such as a PDA, a notebook computer or a remote controller with a built-in wireless infrared communication device as described above, and identifies the identification IDs (MID1 to MIDm) and the private encryption key (from the transmission port of the wireless communication port unit 541). K1 to Km are read or identification IDs MID1 to MIDm and private encryption keys K1 to Km are transmitted to the receiving port of the wireless communication port unit 541.

The reception filter unit 542 and the reception amplifier unit 543 are reception data conversion units, and the reception filter unit 542 includes the identification IDs MID1 to MIDm and the private encryption key K1 transmitted from the wireless communication port unit 541. To Km) to filter the noise included in the reception data signal including the reception amplification unit 543, the reception amplification unit 543 is a predetermined reception data signal filtered through the reception filter unit 542 Amplification ratio is transmitted to the wireless data communication unit 544.

The transmission filter unit 545 and the transmission amplifying unit 546 are transmission data conversion units, and the transmission filter unit 545 is the identification IDs MID1 to MIDm and the private encryption keys K1 to T1 transmitted from the wireless data communication unit 544. The noise included in the transmission data signal including Km) is filtered and transmitted to the transmission amplifier 546, and the transmission amplifier 546 transmits the transmission data signal filtered through the transmission filter unit 545 to a predetermined value. The amplification ratio is amplified and transmitted to the wireless communication port unit 541.

The wireless data communication unit 544 demodulates a reception data signal transmitted from the reception amplifier 543, that is, an analog signal into a digital signal, and transmits the demodulated data to the central processing unit 520 or the transmission data transmitted from the central processing unit 520. The signal, that is, the digital signal is modulated into an analog signal and transmitted to the transmission filter unit 545.

Meanwhile, the central processing unit 520 stores the identification IDs MID1 to MIDm and the private encryption keys K1 to Km of the respective meter gateways M1 to Mm transmitted from the reception port of the wireless data communication module unit 540. While stored in the storage unit 530, the identification IDs MID1 to MIDm and the private encryption keys K1 to Km are stored in the data storage unit 530 when the identification IDs MID1 to MIDm and the private encryption keys K1 to Km are requested. Km) is provided to the encryption key registration device through the transmission port of the wireless data communication module unit 540. In this case, the identification IDs MID1 to MIDm and the private encryption keys K1 to Km may be registered when the local information control apparatus 50 is manufactured or installed.

The central processing unit 520 performs an authentication procedure for the encryption key registration device when a request for the identification IDs MID1 to MIDm and the private encryption keys K1 to Km is received from the encryption key registration device. The authentication procedure is a procedure for determining whether the encryption key registration device is a legitimate device capable of being provided with identification IDs (MID1 to MIDm) and private encryption keys (K1 to Km). After registering the information, this information is compared with the information of the encryption key registration device that attempts the request to determine a valid encryption key registration device. In addition, after registering the preset password, if the same password is entered in the request, it may be allowed to authenticate. If the encryption key registration device attempting a request is not a valid registration device through the authentication procedure, the central processing unit 520 does not provide the identification IDs MID1 to MIDm and the private encryption keys K1 to Km. The identification IDs MID1 to MIDm and the private encryption keys K1 to Km inputted from the encryption key registration device are not registered. Through this authentication procedure, unauthorized communication devices or facilities can be illegally accessed to the subscriber network and distorted or acquired, such as illegally accessing the subscriber network.

In addition, the central processing unit 520 stores the meter reading data transmitted from the power line communication module unit 510 in the data storage unit 530, while corresponding to the request signal transmitted from the wired communication module unit 550. The meter data is extracted from the plurality of meter data stored at 530 and provided to the data communication network 40 through the wired communication module unit 550. The central processing unit 520 temporarily stores the service data transmitted from the wired communication module unit 550 in the data storage unit 530 and transmits the service data to the power line communication module unit 510.

On the other hand, the data storage unit 530 is a nonvolatile memory (ROM), such as a flash memory (flash memory), and a random access memory (RAM). In the data storage unit 530, the meter reading data transmitted from the central processing unit 520 is classified into customers (H1 to Hm), monthly, weekly, nightly, date, and time zone and stored in real time. In addition, the data storage unit 530 stores the identification IDs MID1 to MIDm and the private encryption keys K1 to Km of the respective meter gateways M1 to Mm as shown in FIG. 4. At this time, it is preferable to store the identification IDs MID1 to MIDm and the private encryption keys K1 to Km in the ROM which is a nonvolatile memory. Thus, even when the power is cut off, the identification IDs MID1 to MIDm and the private encryption keys K1 to Km are kept as they are stored in the data storage unit 530. In addition, the data storage unit 530 stores the service data received by the wired data communication terminal 550 and provided through the central processing unit 520 in the RAM.

[Meter gateways M1 to Mm]

One meter gateway M1 to Mm is installed at each customer H1 to Hm at a portion where a meter is previously installed. The meter gateways M1 to Mm perform power line communication with the local information control device 50 through the outdoor lead wire 80. In addition, the meter gateways M1 to Mm perform power line communication with the indoor information control devices D1 to Dm and the terminals T1 to Tn respectively installed inside the customers H1 to Hm through the indoor lead wire 90. .

The meter gateways M1 to Mm receive service data from the local information control device 50 through the outdoor lead line 80 and temporarily store the data in the data storage unit (see '624' in FIG. 5). For example, a large amount of content data is temporarily stored. In this way, the service data stored in the data storage unit 624 is provided to the terminals T1 to Tn through the indoor incoming line 90 upon request. In addition, the meter gateways M1 to Mm measure intangible information such as service data and content data included in the service data provided to the terminals T1 to Tn. For example, the service metering method includes a time-based service metering method, a content-type service metering method, and unit information and a controlled service metering method. This will be described later.

In addition, the meter gateways M1 to Mm measure the power consumption of the corresponding customers H1 to Hm and provide them to the local information control device 50 through the outdoor lead line 80. In addition, the meter gateways M1 to Mm receive the gas / water usage from the indoor information control devices D1 to Dm and provide the gas information to the local information control device 50 through the outdoor lead line 80. Here, the meter gateways M1 to Mm may be provided with gas / water readings directly from the terminals T1 to Tn.

In addition, the meter gateways M1 to Mm are assigned the identification IDs MID1 to MIDm and the corresponding private encryption keys K1 to Km, respectively, and stored in the data storage unit 624. When the encrypted data is transmitted from 50), the encrypted data is decrypted using the private encryption keys K1 to Km. In addition, the meter gateways M1 to Mm encrypt the identification IDs MID1 to MIDm and the meter reading data by using private encryption keys K1 to Km when the meter data is to be transmitted to the local information control device 50. The encrypted data and the unencrypted identification IDs MID1 to MIDm are transmitted.

The meter gateways M1 to Mm include an electric power meter 610 and a service meter 620 as shown in FIG. 5. The power meter 610 includes a power meter module 611 and a wireless data communication module 612, and the service meter 620 includes a power line communication module 621, a central processing unit 622, and wireless data. The communication module unit 623, the data storage unit 624, the data display unit 625, the service / content data metering operation unit 626, and the operation switch unit 627 are included. The power meter 610 is connected to the service meter 620 through the serial port unit 628.

The electricity amount meter 610 measures the power consumption of the corresponding customers H1 to Hm in real time and transmits the power amount to the central processor 622 of the service meter 620 through the serial port unit 628.

The power amount measurement module unit 611 includes a current / voltage detector 6111, a power amount calculator 6112, a power amount processor 6113, and a power amount display 6141. The current / voltage detector 6111 detects the current / voltage from a supply power supply (AC power supply) supplied to the corresponding customer through the outdoor lead wire 80. The power amount calculator 6112 calculates the power amount using the current / voltage detected by the current / voltage detector 6111. The power amount processor 6113 provides the power amount detected by the power amount calculator 6112 to the power line communication module unit 621 through the serial port unit 628. The power amount display unit 6114 displays the power amount provided from the power amount processor 6113 in real time.

The wireless data communication module unit 612 is a wireless infrared communication module unit. The wireless data communication module unit 612 receives a control signal transmitted from a remote controller (not shown) equipped with an external infrared port and receives a power amount processing unit 6113 of the power meter module 611. To pass). In addition, the amount of power provided from the power meter module 611 may be provided to an external infrared communication device (not shown). Here, the external infrared communication device may be a PDA or laptop capable of infrared communication.

The wireless data communication module unit 612 includes a wireless communication port unit 6121, a reception filter unit 6122, a reception amplifier unit 6223, a wireless data communication unit 6224, a transmission filter unit 6125, and a transmission amplifier unit ( 6126). The wireless communication port unit 6121 receives a control signal transmitted from an external infrared remote controller as a wireless infrared communication port unit. The reception filter unit 6122 filters the control signal received by the wireless communication port unit 6121. The reception amplifier 6223 amplifies the filtered control signal. The wireless data communication unit 6224 demodulates the amplified control signal and provides the demodulated control signal to the power amount processor 6113. The power amount processing unit 6113 is controlled by the control signal. In addition, the amount of power is provided to an external device through the wireless data communication unit 6224, the transmission filter unit 6225, the transmission amplifier unit 6262, and the wireless communication port unit 6121 at the request of the electric power.

On the other hand, although not shown, the power meter 610 further includes a central processing unit, a data storage unit, a power line communication module unit, and the like to independently read the metering data to the outdoor lead wire 80 separately from the service metering unit 620. It may be transmitted to the local information control device 50 through. The central processing unit, the data storage unit, and the power line communication module unit may be configured in the same configuration as the central processing unit 622, the data storage unit 624, and the power line communication module unit 6214 to be described in the service metering unit 620. . As such, by configuring the power amount metering unit 610 independently of the service metering unit 620, it is possible to provide simple and convenient management and operation to the power company manager and the network operator.

The service metering unit 620 first receives service data provided through the outdoor tugboat 80 from the local information controller 50 and provides the service data to the terminals T1 to Tm. In addition, intangible information such as service data and content data included in the service data is measured. In addition, the service metering unit 620 is assigned the identification IDs MID1 to MIDm and the private encryption keys K1 to Km, and the local information control device 50, the indoor information control devices D1 to Dm, or the terminals T1 to. When encrypted data is transmitted from Tn), the encrypted data is decrypted using the private encryption keys K1 to Km. In addition, the service metering unit 620 uses private encryption keys K1 to Km to transmit data to the local information control device 50, the indoor information control devices D1 to Dm, or the terminals T1 to Tn. Data is encrypted and transmitted.

The power line communication module unit 621 detects various data such as service data, meter reading data, or Internet connection data transmitted through the outdoor lead wire 80 or the indoor lead wire 90. Various data such as meter reading data, service meter reading data, or Internet connection data are carried on the outdoor tugboat 80, while service data is carried on the indoor tugboat 90. Here, the service meter reading data is a metered value of the service data.

The power line communication module unit 621 includes a power line coupler 6211, a reception filter unit 6212, a reception amplifier unit 6213, a power line communication unit 6214, a transmission filter unit 6215, and a transmission amplifier unit 6216. do. First, the data receiving operation will be described. The power line coupler 6221 detects various data from the outdoor lead wire 80 or the indoor lead wire 90 and provides the received data to the reception filter part 6212. The reception filter part 6212 filters the data provided from the power line coupler 6211. The reception amplifier 6213 provides the data provided from the reception filter 6212 to the power line communication unit 6214. For example, the data detected from the outdoor lead wire 80 is provided to the subscriber network power communication unit, and the data detected from the indoor lead wire 90 is provided to the indoor network power communication unit. The power line communication unit 6214 demodulates this data and transmits it to the central processing unit 622. The data transmission operation will be described. The power line communication unit 6214 modulates the data transmitted from the central processing unit 622 and provides it to the transmission filter unit 6215. The transmission filter unit 6215 filters the data provided from the power line communication unit 6214. The transmission amplification unit 6216 provides the data provided from the transmission filter unit 6215 to the power line coupler 6211. The power line coupler 6211 carries data provided from the transmission amplifier 6216 to the outdoor lead wire 80 or the indoor lead wire 90.

The wireless data communication module unit 623 is a wireless infrared communication module unit similar to the wireless data communication module unit 540 of the local information control device 50, and identifies the corresponding ID among the identification IDs MID1 to MIDm from the mobile encryption key registration device. While receiving the corresponding private encryption key among the ID and private encryption keys (K1 to Km), it provides an identification ID and private encryption key registered with the mobile encryption key registration device. Here, the mobile encryption key registration device may be a PDA, a notebook or a remote controller with a built-in wireless infrared communication device as described above. The wireless data communication module unit 623 includes a wireless communication port unit 6321, a reception filter unit 6322, a reception amplifier unit 6303, a wireless data communication unit 6164, a transmission filter unit 6235, and a transmission amplifier unit ( 6236).

The central processing unit 622 uses either the identification ID of the identification IDs MID1 to MIDm transmitted from the receiving port of the wireless data communication module unit 623 and the private encryption key of any one of the private encryption keys K1 to Km. While storing in the ROM of the data storage unit 624, the identification ID and the private encryption key stored in the data storage unit 624 is provided to the encryption key registration device through the transmission port of the wireless data communication module unit 6161 on request. . The central processing unit 622 stores the power reading amount provided from the serial port unit 628 and the gas / water reading reading amount provided from the power line communication module unit 620 in the data storage unit 624. In addition, the central processing unit 622 stores the service data provided from the power line communication module unit 620, in particular, a large amount of content data in the data storage unit 624, and displays the service data in the data display unit 625.

The data storage unit 624 is composed of ROM and RAM, and the meter reading data transmitted from the central processing unit 622 is classified by customer (H1 to Hm), monthly, weekly, nightly, date, and time zone. Stored in real time. In addition, the data storage unit 624 stores the identification ID MIDi and the private encryption key Ki as shown in FIG. 6. Here, 'i' is 1 to m. The data storage unit 624 stores service data provided from the central processing unit 520, in particular, content data having a large capacity. In addition, the data storage 624 stores the service data reading amount measured through the service / content data meter 626.

The service / content data meter 626 receives the service data and measures the amount of service / content included in the service data. As described above, the metering method includes a time type service metering method, a content type service metering method, and a unit information and controlled service metering method. This is because service data are largely classified into time-based services, content-type services, and unit information and controlled services. Here, the time type service refers to a type of service that can charge a fee by measuring a service providing time. The content and information type service mainly refers to a type of service that can charge a fee by measuring the amount of information and data provided from an external service provider. Here, the content type service mainly means a stream type content service, and the information type service means a service that provides relatively small amount of information such as mail, text message, traffic / weather information, and the like. In addition, the controlled service refers to a type of service that can charge a one-time control service request such as door control, lighting, and control of a remote device.

Unlike other services, time-based service metering is an important metering indicator. Accordingly, information necessary for the metering of timed services includes a service classification code, a service request time, a service requester information, and a service start time with respect to service initiation, and a service classification code and service termination request with respect to service termination. Time, service requester information, and service end time. In addition, information required for time-based service metering after the service is started includes main event information generated when the service is performed, service execution time for each service classification (continuously updated at a predetermined time), and the like.

In addition, a large amount of information is often generated in the time service. For example, when an external intrusion occurs in a security service and an indoor surveillance camera (IP camera) installed in the premises photographs it, a large amount of image information is generated. The meter gateways M1 to Mm collect the image information and store the most recent information in the data storage unit 624 once, and the previous image information may be stored in the home information control devices D1 to Dm or the local information control device ( 50) to store temporarily. If the user wants to view the image information from outside, the consent of the subscriber is required. For the subscriber information protection, the image information stored in the local information control device 50 is unique to the subscriber in the subscriber meter gateways M1 to Mm. Encrypt using a private encryption key to ensure privacy.

In the content-based service metering method, the amount of information and the kind of information provided are important metering indicators. Accordingly, information necessary for the metering of the content type service includes a service classification code, a content service weight classification code, a service request time, service requester information, and the like in relation to service initiation. The content service weight classification code is a code indicating a charge weight of the provided content and is provided to the subscriber in advance when the content service provider assigns the content to each content and the subscriber requests the content through the indoor information control devices D1 to Dm. After the service is started, the information to be managed becomes the main information generated when the service is performed and the total amount of information (in Mbyte) of the information type service.

Unit information and controlled service metering methods are important indicators of the number of information requests rather than the amount or time of information provided. Accordingly, information necessary for the metering of the unit information and the controlled service includes a service classification code, a service request time, and service requester information. As described above, the unit information and the controlled service may include relatively small amounts of information such as weather, traffic, news, and mail, and remote light / door / home / household control.

Hereinafter, the time-based service metering method of the service metering methods will be described as an example. For example, the subscriber requests time-based service start through the indoor information control devices D1 to Dm. On the other hand, in the case of outdoors, the subscriber may remotely request a time type service using a wireless data communication network or an internet network. Meanwhile, the meter gateways M1 to Mm receive the time type service request signals provided from the indoor information control devices D1 to Dm, and service classification codes, service request times, and service start requestors for the services requested by the subscribers. (Subscriber) information is detected and stored in the data storage unit 624. In addition, the meter gateways M1 to Mm provide the service request signal of the subscriber to the service provider server 30 through the local information controller 50. The service provider server 30 transmits the corresponding service data to the meter gateways M1 to Mm through the local information controller 50 in response to the service request signal. The meter gateways M1 to Mm receive service data, detect the transmission time of the service data, and store the service data in the data storage 624. Subsequently, when the subscriber requests termination of the timed service through the indoor information control devices D1 to Dm, the meter gateways M1 to Mm are provided with a service termination request signal, and the service for the service requesting the termination of the service The classification code, service termination request time, and service requester information are detected and stored in the data storage 624. In response to the service termination request signal, the service provider server 30 terminates the transmission of the service data. Meanwhile, the service / content data metering unit 626 of the meter gateways M1 to Mm stores the service classification code, service request time and service start requestor information stored when the service start request is stored in the data storage unit 624, and the service end. The time-based service usage is calculated based on the stored service classification code, service termination request time, and service termination requester information. In this case, the service / content data metering unit 626 calculates service usage in consideration of the main event information and service execution time for each service classification generated after the start of the service when time-based service metering.

The data display unit 625 displays information (including service fee information) about the service that the subscriber wants to request or the service being requested. In addition, various other service data are displayed. For example, the data display unit 625 may be an electroluminescence display (ELD) or a liquid crystal display (LCD).

7A to 7E are outline views implementing the meter gateways M1 to Mm shown in FIG. 5, FIG. 7A is a front view, FIG. 7B is an internal perspective view, and FIGS. 7C and 7D are side views, and FIG. 7E Is the degree of separation.

7A to 7E, the meter gateways M1 to Mm according to the preferred embodiment of the present invention may include a service metering unit 620 and a power metering unit 610 as described above. The unit 620 and the amount of electricity metering unit 610 are fastened through the support unit to be detachable from each other as shown in FIG. 7E as independent devices.

The service metering unit 620 and the power metering unit 610 shown in FIG. 5 are each embedded in a board form inside the square casings 620a and 610a. Hereinafter, the casing 620a is called a service metering casing, and the casing 610a is called an electric power metering casing. Two support members 630 provided at the upper end of the power meter casing 610a are inserted into the lower end of the service meter casing 620a so that the service meter casing 620a is supported by the power meter casing 610a. A support groove (not shown) is provided. In addition, a fastening member 622a is installed at an end of the cover 621a of the service metering unit casing 620a, and the fastening member 622a is a front upper end of the power metering unit casing 610a, that is, the fastening member 622a. It is attached to and detached from the fastening member 612a installed at the corresponding portion. The fastening members 622a and 612a are locked by the sealing member 651 sealed by the network operator. In addition, a fastening member 661 that is locked by a sealing member 661 that is sealed by a power company manager is installed at a lower end of the electric power metering casing 610a.

As shown in FIG. 7A, the service metering unit casing 620a includes a data display unit 625 shown in FIG. 5, transmission / reception ports 6301a and 6231b of a wireless communication port unit 6161, and a light emitting diode (LED) display unit. 625a, the operation switch unit 627 is located. As described above, the data display unit 625 displays information (including service charge information) about the service that the subscriber wants to request or the service being requested. The receiving port 6321a registers identification IDs MID1 to MIDm and private encryption keys K1 to Km, and is a port for receiving an external control signal. The transmission port 6321b is a port for transmitting identification IDs MID1 to MIDm and private encryption keys K1 to Km to the external encryption key registration device. The LED display unit 625a displays the progress state of the service data. On the other hand, the LED display unit 625a indicates whether or not the service provided by the subscriber through the ON / OFF (ON / OFF), the faster the LED flashing speed indicates that the rate of the service provided is higher, The lower the speed at which the LED blinks, the lower the cost of the service provided. The operation switch unit 627 is a power switch installed between the power line communication module unit 620 and the outdoor lead wire 80, and controls the overall operation by controlling AC power supplied to the service metering unit 620. .

Meanwhile, as shown in FIG. 7B, the outdoor lead wire 80 is inserted into the input terminal 613 installed at the lower end of the power meter casing 610a to be connected to the direct current (DC) power supply unit 615 for the power meter. do. Here, alternating current (AC) power supplied through the outdoor lead wire 80 is converted into direct current by the DC power supply unit 615 for the electric power metering unit and is supplied to the electric power metering unit 610. Meanwhile, the AC power supplied through the outdoor lead wire 80 inserted into the input terminal 613 is supplied to the indoor lead wire 90 through the output terminal 614 via the current transformer CT 616. . The AC power output to the current transformer 616 is supplied to the service metering unit DC power supply 629 through the service metering side terminal, and then converted into DC and supplied to the service metering unit 620.

As described above, the meter gateways M1 to Mm have a service metering function and a power metering function separately, and the energy metering unit and the service metering unit such as the electric power amount are in charge of the independent metering functions. The power amount meter 610 and the service meter 620 are sealed by separate sealing members 651 and 661 for independence of operation and management of the power meter 610 and the service meter 620. Through this, the electric power company and the network management company may separately manage the electric power meter 610 and the service meter 620. When the network management company wants to maintain and repair the service metering unit 620, the cover 621a may be opened after releasing the sealing member 651 of the network management company as shown in FIG. 7D. In addition, as described above, the DC power supply unit 629 for the service metering unit uses an AC power source on the output side (load side) and has an operation switch unit 627 to turn the power supply ON / OFF from the network management company. To help. That is, when the subscriber applies for the service, the network operator releases the sealing member 651 of the service metering unit 620 and opens the cover 621a of the service metering unit 620 to open the cover of the service metering unit 620. After the power is turned on, the cover 621a is closed again and then sealed using the sealing member 651 of the service metering unit 620.

[Indoor Information Control Device]

The indoor information control devices D1 to Dm are installed one by one inside the customers H1 to Hm, and are connected to the meter gateways M1 to Mm through the indoor lead wire 90 to perform power line communication. A user terminal having a Man-Machine-Interface (MMI) unit, that is, a control input unit 750 shown in FIG. The indoor information control devices D1 to Dm form one indoor network through the meter gateways M1 to Mm, the terminals T1 to Tn, and the indoor lead wire 90. Each home network shares the same single private encryption key to perform data encryption and decryption in common. For example, the indoor information control device D1 shares data with the meter gateway M1, the terminals T1 through Tn, and the private encryption key K1 in common.

As shown in FIG. 8, the indoor information control devices D1 to Dm may include a power line communication module unit 710, a central processing unit 720, a data storage unit 730, a data display unit 740, a control input unit 750, The wireless data communication module unit 760, a wired data communication module unit 770, and an encryption key input initiation unit 780 are included.

The power line communication module unit 710 detects various data such as service data, meter reading data, or Internet connection data transmitted through the indoor lead wire 90. Then, various types of data such as meter reading data, service meter reading data, or internet connection data are carried on the indoor incoming line 90. The power line communication module unit 621 is similar to the power line communication module unit 621 of the meter gateways M1 to Mm shown in FIG. 5, and includes a power line coupler 711, a reception filter unit 712, and a reception amplifier unit 712. 713, a power line communication unit 714, a transmission filter unit 715, and a transmission amplifier unit 716.

The wireless data communication module unit 760 is a wireless infrared communication module unit and receives a corresponding private encryption key among private encryption keys K1 to Km from a mobile encryption key registration device. Here, as described above, a mobile encryption key registration device may be a PDA, a notebook, or a remote controller 100 in which a wireless infrared communication device is embedded. The wireless data communication module unit 760 is similar to the wireless data communication module unit 623 of the meter gateways M1 to Mm shown in FIG. 5, and includes a wireless communication port unit 761, a reception filter unit 762, and the like. A reception amplifier 763, a wireless data communication unit 764, a transmission filter unit 765 and a transmission amplifier unit 766. In addition, the wireless data communication module unit 760 may perform wireless data communication with a terminal performing wireless data communication among the terminals T1 to Tn.

The wired data communication module unit 770 transmits and receives data through a separate communication line with a terminal performing data communication among the terminals T1 to Tn, such as a computer, a VoIP phone, an IP camera, or a security management controller (not shown). Module to do this. The wired data communication module unit 770 includes a wired communication port unit 771 (eg, RJ45, USB), a reception filter unit 772, a reception amplifier unit 773, a wired data communication unit 774, a transmission filter unit ( 775 and a transmission amplifier 776. If the high-speed power line communication with the terminals T1 to Tn is possible through the indoor lead wire 90, the wired data communication module unit 770 may not be installed.

The central processing unit 720 stores in the ROM of the data storage unit 730 any one of the private encryption key (K1 to Km) transmitted from the receiving port of the wireless data communication module unit 760. The private encryption key stored in the data storage unit 730 performs data communication with the corresponding meter gateways and the terminals T1 through Tn among the meter gateways M1 through Mm. In addition, the central processing unit 720 stores the gas / water reading reading provided from the power line communication module unit 710 in the data storage unit 730 and transmits it to the corresponding meter gateway when requested. In addition, the central processing unit 720 stores the service data provided from the power line communication module unit 710, in particular, a large amount of content data in the data storage unit 730, and provides them to the terminals T1 to Tn upon request. This service data is displayed on the data display unit 740.

The data storage unit 730 is composed of a ROM and a RAM, and the gas / water readings transmitted from the central processing unit 720 are classified into monthly, weekly, nightly, date, time zone, and the like, and are stored in real time. In addition, the private storage key Ki is stored in the data storage unit 730. In addition, the data storage unit 730 stores service data provided from the central processing unit 720, in particular, content data having a large capacity.

The control input unit 750 provides an interface between the subscriber and the indoor information control devices D1 to Dm so that the subscriber can request a service through the indoor information control devices D1 to Dm. The subscriber operates the subscriber operation button unit 750a shown in FIG. 9 to request service data, that is, a service such as service / content.

The encryption key registration initiation unit 780 switches the state of the indoor information control devices D1 to Dm to the registration standby mode in order to register the private encryption keys K1 to Km in the indoor information control devices D1 to Dm. The subscriber closes the remote controller 100, which is an encryption key registration device, to the wireless communication port unit 761 of the indoor information control devices D1 to Dm, and then registers an encryption key registration start pin installed in the indoor information control devices D1 to Dm. 9 '). As a result, the indoor information control devices D1 to Dm prepare to store the private encryption keys K1 to Km.

The data display unit 740 displays information (including service fee information) about the service that the subscriber wants to request or the service being requested. In addition, various other service data are displayed.

Meanwhile, as shown in FIG. 9, the LED display unit 790 is installed next to the data display unit 740 to indicate whether or not the service provided by the subscriber is provided through ON / OFF. The faster the flashing speed indicates that the service fee is higher, and the lower the speed at which the LED blinks, the lower the service fee is.

[terminal]

The terminals T1 to Tn are gas / water meters having a power line communication module embedded therein to perform high-speed power line communication with the indoor information control devices D1 to Dm and the meter gateways M1 to Mm through the indoor lead wire 90. And it includes a sensor, an actuator (actuator), a home appliance, a wiring device (outlet), a lamp, a computer, a VoIP phone, an IP camera, a security device with a built-in power line communication modem. For example, the home appliance may be an air conditioner, a refrigerator, a TV, an audio, or the like. As described above, the terminals T1 to Tn perform high-speed power line communication with the indoor information control devices D1 to Dm and the meter gateways M1 to Mm through a power line communication modem or a power line communication module. In addition, the terminals T1 to Tn share the same private encryption key with the meter gateways M1 to Mm and the terminals T1 to Tn in the same manner as the home information control devices D1 to Dm, and share data and decrypt data in common. Perform

For example, as illustrated in FIG. 10, the terminals T1 to Tn may include a power line communication module unit 810, a central processing unit 820, a data storage unit 830, an LED display unit 840, and a wireless data communication module unit. 850. Here, the terminals T1 to Tn shown in FIG. 10 are components that are commonly required for all terminals T1 to Tn regardless of the type of terminal for power line communication.

The power line communication module unit 810 detects various data such as service data, control signals, or Internet connection data transmitted through the indoor lead wire 90. Then, a variety of data such as meter reading data, service request signal is sent to the indoor incoming line (90). The power line communication module unit 810 includes a power line coupler 811, a reception filter unit 812, a reception amplifier unit 813, a power line communication unit 814, a transmission filter unit 815, and a transmission amplifier unit 816. do.

The wireless data communication module unit 850 is a wireless infrared communication module unit and receives a corresponding private encryption key among private encryption keys K1 to Km from a mobile encryption key registration device. Here, as described above, a mobile encryption key registration device may be a PDA, a notebook, or a remote controller 100 in which a wireless infrared communication device is embedded. The wireless data communication module unit 850 includes a wireless communication port unit 851, a reception filter unit 852, a reception amplifier unit 853, a wireless data communication unit 854, a transmission filter unit 855, and a transmission amplifier unit ( 856). In addition, the wireless data communication module unit 850 may perform wireless communication with a wireless communication device used separately by a subscriber. That is, it provides a wireless interface between the subscriber and the terminals (T1 to Tn).

The central processing unit 820 stores any one of the private encryption keys K1 to Km transmitted from the receiving port of the wireless data communication module unit 840 in the ROM of the data storage unit 830. The private encryption key stored in the data storage unit 830 performs data communication with the corresponding meter gateways and the terminals T1 through Tn among the meter gateways M1 through Mm. In addition, the central processing unit 820 stores the service data transmitted from the power line communication module unit 810 in the data storage unit 830, or transmits to a corresponding communication device, such as a computer, a VoIP phone, an IP camera or a security device. In addition, the central processing unit 820 stores the gas / water readings read through the gas / water meter in the data storage unit 830.

The data storage unit 830 is composed of a ROM and a RAM, and the gas / water readings transmitted from the central processing unit 820 are classified into monthly, weekly, nightly, date, time zone, and the like, and are stored in real time. In addition, the private storage key Ki is stored in the data storage unit 830. In addition, the data storage unit 830 may store service data provided from the central processing unit 820, particularly content data having a large capacity.

The LED display unit 840 indicates whether or not the service provided by the subscriber through the on / off, the faster the speed of the LED blinks indicating that the service fee is higher, the lower the speed of the LED blinks It also has a function of indicating that the lower the fee of the service provided.

Meanwhile, a mobile encryption key registration device will be described with reference to FIGS. 11 and 12. FIG. 11 is a configuration diagram of a remote controller 100 among mobile encryption key registration devices, and FIG. 12 is an external view of the remote controller 100 having the configuration of FIG. 11.

As illustrated in FIG. 11, the remote controller 100 includes a wireless data communication module 110, a central processing unit 120, a data storage unit 130, a status display unit 150, an operation control input unit 160, and a power supply unit ( 170). In addition, the remote controller 100 may further include a status display unit 150.

The wireless data communication module unit 110 is a wireless infrared communication module unit. The wireless data communication module unit 540 of the local information controller 50 shown in FIG. 3 or the meter gateways M1 to Mm shown in FIG. 5 is shown. Wireless infrared communication is performed with the wireless data communication module unit 623 of FIG. 10 or the wireless data communication module unit 810 of the terminals T1 to Tn shown in FIG. 10. The wireless data communication module unit 110 includes a wireless communication port unit 111, a reception filter unit 112, a reception amplifier unit 113, a wireless data communication unit 114, a transmission filter unit 115, and a transmission amplifier unit ( 116).

The central processing unit 120 draws out the identification IDs MID1 to MIDm and the private encryption keys K1 to Km stored in the ROM, which are nonvolatile memories of the data storage unit 130, under the control of the operation control input unit 160. The identification IDs MID1 to MIDm and the private encryption keys K1 to Km provided from the wireless data communication module 110 are stored in the ROM of the data storage unit 130 while being provided to the data communication module 110. . The central processing unit 120 displays the write (W) or read (R) process of the identification IDs MID1 to MIDm and the private encryption keys K1 to Km on the status display unit 150. In addition, the central processing unit 120 may display such a writing or reading process through the data display unit 140.

The data storage unit 130 is composed of a ROM and a RAM, and the identification IDs MID1 to MIDm and the private encryption keys K1 to Km are stored in or after the remote controller 100 is manufactured. For example, when the identification ID MID1 and the private encryption key K1 are registered in the meter gateway M1, that is, the data storage 130 of the remote controller 100 provided to one subscriber is provided with the identification ID ( MID1) and private encryption key K1 are stored. On the other hand, if you want to register the identification ID (MID1 to MIDm) and the private encryption key (K1 to Km) in the local information control device 50, the data storage unit 130 of the remote control 100, all the meter gateway ( Both the identification IDs MID1 to MIDm and the private encryption keys K1 to Km registered in M1 to Mm are stored.

The status display unit 150 is composed of at least one LED as shown in Figure 12, and displays the process of writing or reading the identification ID (MID1 to MIDm) and private encryption keys (K1 to Km). For example, the red light emits light when the writing or reading process fails, and the green light emits light when the writing or reading process is successful.

The operation control input unit 160 includes an encryption key writing control unit 161 and an encryption key reading control unit 162. The encryption key writing control unit 161 controls the central processing unit 120 to transmit the identification IDs MID1 to MIDm and / or the private encryption keys K1 to Km through the wireless data communication module unit 110. To Mm), the local information control device 50, the indoor information control devices D1 to Dm, or the terminals T1 to Tn. The encryption key reading control unit 162 controls the central processing unit 120 to identify the identification IDs MID1 to MIDm from the meter gateways M1 to Mm or the local information controller 50 through the wireless data communication module unit 110. And / or read out the private encryption keys K1 to Km.

As shown in FIG. 12, the front part of the remote controller 100 includes an encryption key write button 161a and an encryption key read button 162a. For example, the subscriber moves the wireless communication port 111 of the remote controller 100 to the wireless communication port 6121 of the meter gateways M1 to Mm, and then pushes the encryption key read button 162a to the meter gateway. The private encryption keys K1 to Km stored in the data storage unit 624 of M1 to Mm are downloaded. At this time, when the private encryption keys K1 to Km are normally downloaded and stored in the data storage unit 130, the LED 150 emits green light. Otherwise it emits red light.

On the other hand, as described above, in order for the meter gateways M1 to Mm to be authenticated by the local information control apparatus 50 located outdoors, the identification IDs MID1 to MIDm and the private encryption key ( K1 to Km) registration process should be performed. Accordingly, the following describes the registration process of the identification IDs MID1 to MIDm and the private encryption keys K1 to Km of the respective meter gateways M1 to Mm using the remote controller 100.

First, a unique private encryption key is stored in the data storage unit 624 of the meter gateways M1 to Mm, and the identification ID MID1 of each of the meter gateways M1 to Mm is stored in the local information controller 50. To MIDm) will be described below. In this case, the identification IDs MID1 to MIDm previously registered in the local information controller 50 may be remotely registered through power line communication, wireless data communication, or wired data communication. The network operator reads a private encryption key stored in the data storage unit 624 of the meter gateways M1 to Mm, for example, using the remote controller 100. That is, the wireless communication port unit (refer to '111' in FIG. 12) of the remote controller 100 is moved to the data storage unit 624 by bringing the wireless communication port unit 6161a of the wireless communication port unit 6161 of the corresponding meter gateway into proximity. Read the private encryption key already saved. The private encryption key thus read is stored in the data storage unit 130 of the remote controller 100. Subsequently, the remote controller 100 approaches the wireless communication port unit (see '531' in FIG. 3) of the local information controller 50 to store the private encryption key stored in the data storage unit 130. To be sent. As described above, the private encryption key sent to the local information controller 50 includes a pair of identification IDs MID1 to MIDm and private encryption keys K1 to Km as shown in FIG. 4. Are stored in 'reference'.

As another method, the identification ID of the meter gateways M1 to Mm is not assigned to the local information control device 50, instead of allocating a private encryption key at the time of shipment of the meter gateways M1 to Mm as described above. When registering (MID1 to MIDm), the local information control device 50 generates an arbitrary private encryption key so that the identification IDs MID1 to MIDm and the private encryption keys K1 to Km are paired as shown in FIG. In the data storage (see 530 of FIG. 3). In this case, it is possible to register the identification IDs MID1 to MIDm of the meter gateways M1 to Mm in the local information controller 50 only by a limited administrator, that is, an administrator having authority. That is, as described above, it is also possible to remotely register the access password of the local information control device 50 in the management center. Thereafter, the wireless communication port 111 of the remote controller 100 is approached to the transmission port of the wireless communication port 541 of the local information controller 50 to read out the private encryption key previously stored in the data storage 530. do. The private encryption key thus read is stored in the data storage unit 130 of the remote controller 100. Thereafter, the remote controller 100 is approached to the receiving port portion 6321b of the meter gateway to transmit a private encryption key stored in the data storage 130 to the meter gateway. The private encryption key sent to the meter gateway is stored in the data storage unit 624 of the meter gateway.

On the other hand, the private encryption key registration process of the indoor information control devices (D1 to Dm) and the terminals (T1 to Tn) is performed in the same manner as described above. That is, the private encryption key is extracted from the meter gateways M1 to Mm or the local information control device 50 using the remote controller 100, and then the private information keys of the indoor information control devices D1 to Dm and the terminals T1 to Tn. The data storage units 730 and 830 store the data.

Hereinafter, a data encryption / decryption method according to a preferred embodiment of the present invention will be described with reference to FIGS. 13A and 13B. For convenience of explanation, the data encryption / decryption between the local information control device 50 and the meter gateway M1 will be described as an example.

As shown in FIG. 13A, when the message Hello is to be transmitted from the local information controller 50 to the meter gateway K1, the local information controller 50 is shared with the meter gateway K1. Encrypt the message using the private encryption key (K1) used. The local information controller 50 transmits the encrypted message E _k1 (Hello) to the meter gateway M1. At this time, the encrypted message E _k1 (Hello) is transmitted through the outdoor lead wire 80 which is also commonly connected to other meter gateways M2 to Mm, so that the encrypted message E _k1 (Hello) is transmitted to the meter gate. A case may be generated that is detected by other meter gates M2 through Mm in addition to the way M1. It is assumed here that the meter gateway M3 detects the encrypted message E _k1 (Hello) from the outdoor incoming line 80. In this case, the encrypted message E _k1 (Hello) is detected by the meter gateway M1 and the meter gateway M3. The meter gateway M1 detects the encrypted message E _k1 (Hello) and then decrypts it using the private encryption key K1 to obtain the decrypted message Hello. On the other hand, meter gateway (M3) is an encrypted message (E _k1 (Hello)) to even detect the encrypted message (E _k1 (Hello)) to do a private encryption key (K1) is not registered for decrypting encrypted The message E _k1 (Hello) cannot be decrypted.

As shown in FIG. 13B, when a message Hello is to be transmitted from the meter gateway M1 to the local information controller 50 mutually authenticated with the meter gateway M1, the meter gateway M1. The non-encrypted identification ID MID1 and the private identification key M1 encrypted with the encryption key K1 transmit the message Hello to the local information controller 50 through the outdoor entrance line 80 at the same time. At this time, the data (MID1, E _k1 (MID1 + Hello)) of the meter gateway M1 is exposed to the device 51 which is not mutually authenticated using the outdoor lead wire 80 illegally. In this case, the data MID1 and E _k1 (MID1 + Hello) are provided not only to the mutually authenticated local information control device 50 but also to the device 51 which is not mutually authenticated. The local information controller 50 receives the data MID1, E _k1 (MID1 + Hello), searches for an encrypted identification ID MID1 included in the data MID1, E _k1 (MID1 + Hello), Among the private encryption keys K1 to Km, a private encryption key capable of decrypting data is determined. Here, the private encryption key K1 is used. The encrypted data E _k1 (MID1 + Hello) is decrypted using the private encryption key K1 to obtain the decrypted identification ID MID1 and the message Hello. The non-encrypted identification ID MID1 and the identification ID MID1 included in the decrypted data are compared to determine that the data is transmitted from the authenticated meter gateway M1 only when the two identification IDs match. On the other hand, the device 51 which is not mutually authenticated may receive the data MID1 and E _k1 (MID1 + Hello) provided from the meter gateway M1, similarly to the mutually authenticated local information control device 50. However, since the private encryption key K1 is not registered, the encrypted message E _k1 (Hello) cannot be decrypted.

In addition, the data encryption / decoding method between the meter gateways M1 to Mm, the indoor information control devices D1 to Dm, and the terminals T1 to Tn is performed in the same manner as the above-described method. For example, data encryption and decryption is performed using the private encryption key K1 for the meter gateway M1, the indoor information control device D1, and the terminals T1 to Tn. That is, data encryption and decryption is performed using the same private encryption key shared between the meter gateway, the indoor information control device, and the terminal connected to each other by the indoor network.

Although the technical spirit of the present invention described above has been described in detail in the preferred embodiments, it should be noted that the above-described preferred embodiments are for the purpose of description and not of limitation. In addition, the present invention will be understood by those of ordinary skill in the art that various embodiments are possible within the scope of the technical idea of the present invention.

As described above, according to the present invention, in a power line communication system including a meter gateway and a local information controller for performing data transmission and reception through a subscriber network based on a power line, between the local information controller and the meter gateway. When data is transmitted and received, data encryption / decryption is independently performed by using a private encryption key allocated to each meter gateway to enhance meter reading data and service data security. Accordingly, the present invention can stably prevent the leakage and manipulation of data such as unauthorized communication devices or equipments illegally accessing the subscriber network and distorting or acquiring the subscriber information according to a legal method or procedure.

1 is an overall configuration diagram of a service additional power line communication system according to an exemplary embodiment of the present invention.

FIG. 2 is a diagram illustrating a subscriber network and a home network of the service supplementary powerline communication system shown in FIG. 1.

FIG. 3 is a detailed configuration diagram of the local information control apparatus shown in FIG. 1.

FIG. 4 is a diagram illustrating an identification ID and a private encryption key stored in the data storage shown in FIG. 3.

FIG. 5 is a detailed configuration diagram of the meter gateway shown in FIG. 1.

FIG. 6 is a diagram illustrating an identification ID and a private encryption key stored in the data storage shown in FIG. 5.

7A-7E are outline views of the meter gateway shown in FIG. 5.

8 is a block diagram of the indoor information control device shown in FIG.

9 is an external view of the indoor information control device shown in FIG.

FIG. 10 is a configuration diagram of the terminal shown in FIG. 2.

11 is a configuration diagram of the remote control.

12 is an external view of the remote controller illustrated in FIG. 11.

13A and 13B are diagrams for explaining data encryption and decryption using a private encryption key.

<Explanation of symbols for main parts of the drawings>

10: power company server 20: network operator server

30: service provider server 40: data communication network

50: local information control device 60: column transformer

70: transmission and distribution line 80: outdoor incoming line

90: indoor lead wire H1 to Hm: customer

M1 to Mm: Meter Gateway D1 to Dm: Home Information Control Device

T1 to Tn: terminal MID1 to MIDm: identification ID

K1 to Km: private encryption key

510, 620, 710, 810: power line communication module

511, 6211, 711, 811: power line coupler

512, 542, 552, 6122, 6212, 6232, 712, 762, 772, 112: Receive filter unit

513, 543, 553, 6123, 6213, 6233, 713, 763, 773, 113: reception amplifier

514, 544, 554, 6124, 6214, 6234, 714, 764, 774, 114: power line communication unit

515, 545, 556, 6125, 6215, 6235, 715, 765, 775, 115: Transmission filter unit

516, 545, 555, 6126, 6216, 6236, 716, 766, 776, 116: transmission amplifier

520, 622, 720, 120: central processing unit

530, 624, 730, 130: data storage

540, 612, 623, 760, 110: wireless data communication module

541, 6121, 6231, 761, 111: wireless communication port section

544, 6124, 6234, 764, 114: wireless data communication unit

550, 770: wired data communication module

551, 771: wired communication port 554, 774: wired data communication

610: power metering unit 611: power metering module

6111: current / voltage detector 6112: power amount calculator

6113: power amount processing unit 6114: power amount display unit

620: service metering unit 625, 740, 140: data display unit

626: service / content data metering unit 627: operation switch

625a, 790, 840: LED display unit 610a: power metering casing

620a: service metering casing 6231a: receiving port

6231b: Transmission port 613: Input terminal

614: output terminal 615: DC power supply for power meter

629: DC power supply unit for the service metering unit 616: current transformer

630: support member 612a, 622a, 660: fastening member

651, 661: sealing member 621a: cover

150: status display unit 160: motion control input unit

161: encryption key writing control unit 162: encryption key reading control unit

161a: encryption key entry button 162a: encryption key read button

170: power supply section 628: serial port section

780: encryption key registration start portion 750a: subscriber operation button portion

Claims (10)

In a power line communication system including a local information control device for performing data transmission and reception through a subscriber network based on a power line and a plurality of meter gateways, When transmitting and receiving data between the area information control device and the plurality of meter gateways in the subscriber network, the area information control device decrypts and decrypts data using a private encryption key registered for each of the plurality of meter gateways. Service-added power line communication system for performing data transmission and reception with the corresponding meter gateway. A plurality of terminals installed in each customer; An indoor information control device that performs power line communication with the plurality of terminals through an indoor network based on a power line installed in the customer, and provides an interface with a subscriber; Each customer is installed one by one to perform power line communication with the plurality of terminals through the home network, and request a service according to the request of the indoor information control device, each with a unique identification ID and corresponding private encryption key Registered meter gateways; The plurality of meter gateways perform power line communication with the plurality of meter gateways through a subscriber network based on power line communication in which the plurality of meter gateways are connected in common, and the identification IDs and private encryption keys of the plurality of meter gateways are all registered. Local information controller; And An external server that performs data communication through the local information control apparatus and a data communication network and provides a service corresponding to a service request of the meter gateway, When transmitting and receiving data between the plurality of meter gateways and the area information control device in the subscriber network, the area information control device decrypts and decrypts data using a private encryption key registered for each of the plurality of meter gateways. Service-added power line communication system for performing data transmission and reception with the corresponding meter gateway. The method of claim 2, When transmitting and receiving data between the meter gateway, the indoor information control device, and the plurality of terminals in the indoor network, the indoor information control device and the terminal jointly use a private encryption key registered for each meter gateway. A service-added power line communication system performing data transmission and reception with a corresponding gateway by amplifying the data. The method according to claim 1 or 2, The meter gateway transmits data including an unidentified identification ID, an identification ID encrypted by a private encryption key, and a message to the local information controller, and the local information controller is transmitted from the meter gateway. And receiving and using data by decrypting an encrypted identification ID and a message included in the data using a private encryption key of the meter gateway. The method according to claim 1 or 2, The meter gateway transmits data including an unidentified identification ID, an identification ID encrypted by a private encryption key, and a message to the local information controller, and the local information controller is transmitted from the meter gateway. Receives data, decrypts the encrypted identification ID and message included in the data using the private encryption key of the meter gateway, compares the decrypted identification ID with the unencrypted identification ID, and confirms whether the transmitted data is legitimate data. Service-added power line communication system for determining. The method according to claim 1 or 2, The local information controller transmits the encrypted data using the private encryption key of the corresponding meter gateway to the corresponding meter gateway, and the corresponding meter gateway receives the encrypted data transmitted from the local information controller and receives the private encryption. A service-added power line communication system for decrypting and using data encrypted with a key. The method according to claim 1 or 2, And the area information controller and the meter gateway include a wireless infrared port to enable wireless infrared data communication, and wherein the identification ID and the private encryption key are registered through the wireless infrared port. (a) registering an identification ID and a private encryption key corresponding to the identification ID in a plurality of meter gateways and a local information controller connected to the plurality of meter gateways and a subscriber network; (b) the meter gateway encrypts the identification ID and the message using the corresponding private encryption key, and then transmits the first data including the unencrypted identification ID, the encrypted identification ID, and the message through the subscriber network. Transmitting to the control device; And (c) receiving, by the local information controller, the first data transmitted from the meter gateway, and decrypting an encrypted identification ID and a message included in the first data using a corresponding private encryption key. A service-added power line communication method. The method of claim 8, After the step (c), the local information controller compares the decrypted identification ID with the unencrypted identification ID and transmits the same from the meter gateway when the decrypted identification ID and the unencrypted identification ID are the same. And determining the data as legitimate data. (a) registering an identification ID and a private encryption key corresponding to the identification ID in a plurality of meter gateways and a local information controller connected to the plurality of meter gateways through a subscriber network; (b) encrypting data to be transmitted using a private encryption key of the corresponding meter gateway, and transmitting the second data to the corresponding meter gateway; And and (c) the meter gateway receiving the second data transmitted from the local information controller and decrypting the second data using the corresponding private encryption key.