CZ20004001A3 - Method for transmitting and storing value and value store electric power meter using the same - Google Patents

Abstract

A value store electric power meter is provided. The server of an electric power supplier, an electric power seller, or an electric power reseller transfers value through an electric power line through a built-in electric power modem, stores value received through the electric power modem inside the value store electric power meter in a value store module, reduces a value according to the amount of electric power consumption, omits processes of visually reading a meter, calculating the amount of use, printing and mailing a bill, settling up, and paying an uncollected amount and arrears. Accordingly, it is possible to save electric power supplying costs, to reduce the electric power rate by a user, and maximizing the profit of the electric power supplier. The electric power meter is used for IC card payment type gas and water meters in which the IC card having credit value is transferred and stored in an off-line state. Accordingly, the electric power value and the added value measurement is easily and rapidly performed. Therefore, it is convenient for the user and remarkably reduces all the costs.

Description

Technical field

The present invention relates to a storage meter according to a new concept, more specifically to a storage method, by which a power supply server or power dealer transmits value via a power line modem and stores the value in a value storage module (SVM) * or on a smart card , and electricity meter for prepaid and direct payments without the need to read the meter.

BACKGROUND OF THE INVENTION

So far, in all institutions where electricity is consumed, such as households, offices and public buildings, a conventional electricity meter has been used to measure the electricity consumed, based on the consumption of watts per hour read by an authorized employee. This first-generation electricity meter follows a very complex and costly way, where a worker visits places where electricity meters are installed in households and businesses, and checks the difference between the amount of energy consumed in the previous measurement and the amount of energy at the time of measurement, ie or another period. The supply and consumption calculation is carried out by the supplier, who, after calculating the data and calculating the quantity consumed, prints the bill and sends it to the customer. He will receive a request for payment. The account must then be resubmitted to process outstanding and unpaid payments.

However, fraudsters sometimes impersonate the workers concerned and, in addition, the cost of metering significantly increases the cost of electricity supply as a result of the expenditure per person in charge. Therefore, it is a new measurement. Because the text contains a demand window and flowcharts in a spelling language and a number of computer abbreviations known in the art (e.g., DESyPPIJj had to keep these abbreviations in their original form, i.e. in most prgtodůye form composed of the initial letters of the English original). The meaning of the abbreviations is explained by 1) directly in the description of the invention, or 2) as an explanation of the text in the drawings.

The process contemplates a long-distance electricity meter that will be a second generation product and which is not yet generally used. However, the amount consumed needs to be processed every month on a computer, sent an account, and settled arrears. In particular, suppliers and consumers avoid controlling remote meters such as gas and water meters that require additional power and communication lines, such as telephone or radio lines. This is due to the cost increase caused by the interconnection between gas and water meters, the remote metering server, and the installation and operation of the communication equipment after connecting the remote metering communication function.

Therefore, a third-generation electricity meter for smart card payment may be considered for which visual measurement is not necessary. The electricity meter for smart card payment can to some extent solve the problems of the second and second generation electricity meters. However, the efficiency of the meter for smart card payment depends on how to recharge the card and calculate the value information on the smart card. Especially if the power supply is disconnected due to the complete consumption of the value information on the smart card, an unexpected failure may occur.

SUMMARY OF THE INVENTION

A first object of the invention is to show a method for transmitting and storing a value in which the power supply server or power dealer communicates with the power meter for storing the value of each customer, stores the value in the value storage module (SVM) inside the meter according to the invention credit value and stores the credit value added information on the chip card. Suppliers or dealers thus create high added value for the consumer by increasing management efficiency and substantially reducing the price of electricity.

A second object of the invention is to provide a process for storing value on a smart card by means of which credit value information transmitted via a power line modem can be used for all meters such as gas meters, water meters and calorimeters for measuring thermal energy installed and operated offline in households and businesses.

A third object of the invention is to provide a storage meter that can increase the efficiency of power management by communicating with a verified agency host computer via a power line modem and transmitting credit value information and storage

-3information about credit value on smart card. Thus, it is possible to reduce the cost of electricity to consumers by substantially reducing the incidental costs of supplying electricity by avoiding the need to enter and calculate the amount of electricity consumed over a period of time, since a server is used to print accounts and send and calculate accounts.

A fourth object of the invention is to provide a value storage meter that can solve all the problems of first, second and third generation electricity meters by convenient and easy charging and charging of value and value added on the smart card using the value charging channel. The stored value meter can therefore be applied to various meters, such as a gas meter, water meter and calorimeter. This makes it possible to make the various processes as efficient as possible.

To achieve the above goals, an electricity meter will be created to store the value for communication with the power supply server via the power line modem contained in the meter, store the value information in the meter's value storage module, calculate the value according to the amount of electricity consumed, and when the credit value is completely depleted.

One aspect of the invention shows a method for storing credit information in a value storage module in a value storage meter based on communication between the host computer and each terminal via a power line modem included in the value storage meter which is a terminal comprising the steps of

a) generating beer random data by the host computer, sending the first random data to the terminal, creating the session key by the key generation algorithm using the terminal's internal secret key, creating the first signature value by the signature generation algorithm for comparison during authentication fjeoz ^ r- pfeidad & tofky ) terminal and receiving the first random data by the terminal and creating a session key in the same way as the host computer,

b) generating a second signature value by an algorithm for generating the signature and second random data and sending the second random data to the host computer;

c) comparing the first and second values of signature and authentication of the terminal by the host computer,

wherein the host computer generates a third signature value and sends a third signature value to the terminal with the money amount after the terminal authentication, receiving the third signature value and the money amount from the host by the terminal, creating a fourth signature value and authenticating the host by comparing the third and fourth signature values and

d) increasing the value after decrypting the money information and sending the value obtained by encrypting the balance and the terminal ID using the encryption algorithm to the host computer, receiving the encrypted value by the host computer, decrypting the encrypted value, comparing the stored terminal ID with the decrypted terminal ID, after the backup file balance authentication has been performed.

Another aspect of the invention provides a storage meter comprising a power line input and output terminal for measuring the amount of power consumed, comprising an operating portion of power consumption to measure power line voltage and current and calculate power consumption and a power line modem for data communication between the host computer and the terminal over the power line. It also includes a security part including a basic processor (SAM) secure access module (SAM), an encryption key and a value storage encryption algorithm, and a value storage module (SVM) to prevent value information from being compromised and disrupted except for cryptographic attacks where when requesting a SVM token, a SAM authentication process is required, a latch relay for interrupting power supply to the SVM balance, and a value changer for the stamp. It operates by inputting value information from the SVM according to the amount of electricity consumed per unit of time, and when the internal mark is exhausted, the SVM requests a new mark to the stack.

The storage meter further preferably includes a chip card reading and recording portion allowing its use for other meters such as water meters, gas meters and calorimeters. This is done by inserting the smart card into the electricity meter, receiving the value from the host computer in the on-line mode,

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9 9 9 9 9 9 9 9 by recording the received value on the inserted smart card and reading the received value from the smart card.

The chip card reading and recording portion is preferably used for water meter, gas and heat meters working with the chip card offline, by adding value to the chip card via the modem, eg for gas and water, where the value can be stored on the card power based on the communication port. It contains eight terminals defined by ISO 7816, Part 2, with Vcc, Clk, DIO, Reset and Gnd functions for synchronous and asynchronous communication with the smart card.

The storage meter further preferably includes an AC to DC converter for supplying the operating voltage needed for the meter, an energy consumption sensor indicating a normal power usage condition when the sensor input is 0, and the sensor is 1, terminals they are blocked and electricity is used in an unauthorized manner. It also includes a buzzer to generate an audible alarm prompting the user upon receipt of the last grade, requesting a new grade from SVM, and exhausting the balance in the grade changer to convert and store the value.

Preferably, the operating portion of the power consumption system includes an AC current shunt, a voltage divider for series connection of two resistors, and a choice of a voltage range given by the ratio of both resistors to match the AC line voltage within the voltmeter input voltage range. current that flows through the shunt to a 16- or 20-bit digital signal and an analog-to-digital converter for converting AC voltage to a 16-bit digital signal, wherein the voltage phase is compared to the current phase and the angle at which the two phases are relative shifted, and output as a signal for applying differentiated rates.

Preferably, the stored value meter includes a power consumption table in the form of a 50%, 75%, 100%, 150%, and 200% electricity rate mode mode based on real-time clocks containing a year, month, time, minutes and seconds.

The storage meter preferably comprises a non-volatile memory storing characteristic 3 bytes of the ID number and recording the power status over a certain number of hours, days, or months to remotely monitor unauthorized or atypical use of power and perform an electronic sealing function.

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The storage meter preferably includes a liquid-crystal display to visually display the present value, the value conversion, the real-time power consumption state, and the states where the stored electric power is used.

The value-added electricity meter, which can be used as a means for simple and reliable payment of fees by the Electronic Business Transaction (SET) procedure using the next generation of EMV'96 credit and direct payment cards in combination with a smart card reader and recorder, is a telephone, internet, P-ATM (EMV'96) terminal and digital intercom device. It is used for audio communication with the person serving the host server, or it sends an audio message to help the user, for example, to enter data and the keyboard device to the user who wants to save the value directly.

The input and output of electrical energy to the (z) value-saving electricity meter, preferably comprising a housing and physical sealing against violent intrusion, prevents unauthorized and atypical use of electrical energy.

The storage meter further preferably includes a lightning arrester circuit for absorbing lightning or shock voltage on the supplier's power line.

The storage meter may preferentially request a voice message from the operator concerned using the loudspeaker and keyboard switch of the intercom device. The carrier supports the procedures for transferring and storing the credit value by transmitting the voice service to the customer.

Description of the drawings

The foregoing objects and advantages of the invention will be more readily understood by providing a detailed description of the preferred embodiment with reference to the accompanying drawings.

Fig. 1 is a flowchart showing a process for transmitting and storing a value according to the invention.

Fig. 2 is a flowchart showing the progress of the correction commands of the multi-stage differentiated charging mode (change of the electricity charging system) after hours, days, months, and time periods applied to the storage meter according to the invention.

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Figure 3 is a flowchart showing procedures for monitoring atypical power consumption, such as monitoring and preventing unauthorized consumption by comparing the total energy used by consumers on the electricity meter of the invention per unit of time, such as days, weeks, or months, with total electricity consumption per unit of time .

Figure 4 schematically describes the signature creation process and encryption process used in accordance with the invention.

Figure 5 is a block diagram illustrating the internal structure of a stored value meter according to the invention.

Figure 6 shows a structure of a system according to the invention for describing a value information flow.

Figure 7 is a split perspective view of an external view of a value storage meter according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

The procedure for transmitting and storing a value according to a preferred embodiment of the invention and the structure and operation of the storing value meter which do not need to be measured with visual reading will be described in more detail below.

The invention can be applied to an electricity meter, gas meter, water meter and calorimeter using procedures for calculating direct and advance payment in combination with the electronic wallet method. Here, the invention will be limited to an electricity meter for simplicity. The basic triple DES encryption algorithm is used in all communication methods for transmitting and storing a value according to the invention. The communication between the host server and the electricity meter is as follows. The server and terminal first create a session key (Ks). A triple DES encryption algorithm is used during the session key. Also, when a signature needs to be created, MAC CBC (encrypted text concatenation) is performed using triple DES. When the values are stored in the meter terminal, the electricity billing calculation mode table, the billing unit and the time for repair are stored. After reading the values from the meter terminal, the credit balance, date, month and year of consumption, the power consumption calculation mode table, the charging unit and the timer are read out, providing information for eventual detection of unauthorized use.

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Before describing the method of transmitting and storing a value according to the invention, examples of signature creation and the encryption algorithm used will be given with reference to Figure 4.

After the server and the terminal perform the session key creation (Ks) job through the value-to-value communication between the server and the stored value, a triple DES encryption algorithm is used during the session key (Ks). . Here, the signature creation and encryption algorithm will be described in more detail with reference to Figure 4.

When generating the signature, the original data sizes are determined by the padding in step 1 as multiples of 64 bits. This is Di, ... and D _N in Figure 4. In step 2, the data values (D _N ) of 64 bits are encrypted as F according to the input key (K) after the application of the triple DES algorithm. The signature values are labeled O · ,, ... and On in step 3. At this point, the values obtained by adding individual data values (D _N ) to the signature values (0 ^), with the exception of the first signature value Oi, are encrypted as F.

For encryption, the original data sizes are determined based on padding in step 1 as multiples of 64 bits. This is D _{1 (} ... and D _N. In step 2, the triple DES algorithm is applied to F encryption. The encrypted messages are designated Oi, ... and O _N in step 3.

The host computer master key (KH), the internal secret key (KT) of each terminal, and the session secret key (Ks) operating in the communication process, each 128 bits in size, are used. A terminal internal key (KT) is formed from the host computer master key (KH). A session key (Ks) is formed from the terminal's internal key (KT). The host computer master key (KH) and the terminal internal key (KT) are randomly selected from different sets.

The terminal's internal key (KT) is formed by encrypting the terminal ID with a triple DES algorithm using the host computer's master key (KH). The internal key is stored in the terminal during the generation step and is generated on the host computer at an early stage of communication. Specifically, KT - Encrypt (ID, KH).

The session key (Ks) is always formed during communication by encrypting random numbers R generated by the host computer by the triple DES algorithm using the terminal's internal key (KT). All encryption is performed in the communication process using session key (Ks). Specifically, Ks = Encrypt (R, KT).

The invention uses 1) a value-saving command, 2) a differentiated billing mode control command based on hours, days, months, or periods, and 3) a command for days, weeks, or months of use, and for ·· «···

timer command to check information (to monitor unauthorized use). They will be described with reference to Figures 1 to 3.

First of all, reference will be made to Figure 1 of the procedure for storing a value.

Step 10: The host computer generates the first random data (R1, R2 and n) and sends the first random data to the terminal. Using a terminal internal secret (KT [nJ), a session key is established. Specifically, Ks = Encrypt (R1, KT [n]). For comparison in terminal authentication, the first signature value S1h = Sig (R2, Ks) is generated based on the signature generation algorithm. The terminal receives the first random data (R1, R2 and n) and creates a session key as with the host computer using the terminal's internal secret key (KT [nj). Specifically, Ks = Encrypt (R1, KT [n],

Step 12: The terminal generates the second signature value S1t = Sig (R2. Ks), the second random data R3 and sends the S1t and R3 to the host computer by the signature generation algorithm.

Step 14: The host computer can perform terminal authentication after comparing S1h with S1t. When the terminal is authenticated, the host computer generates a third signature value S2h = Sig (H + R 3 + EnAmnnt, Ks) and sends the S2h to the terminal along with the encoded total amount of money (EnAmnt). Here is an H header representing a command to store a value. The terminal creates a fourth signature value S2t = Sig (H + R3 + EnAmnt, Ks) and performs host authentication by comparing S2h with S2t.

Step 16: After authentication of the host computer, the terminal increases the value, encrypts the balance, ie Balance + ID, such as M = Encrypt (Balance + ID, Ks) and sends the encrypted value M to the host computer. After decrypting the encrypted value M as Balance '+ ID' = Decrypt (M, Ks) and comparing the ID's ID, the host computer re-authenticates the terminal.

The differentiated billing mode control order flow based on hours, days, months, and period (billing system) will be described with reference to Figure 2.

Step 20: The host computer generates the first random data (R1, R2 and n) and sends the first random data to the terminal. The key generation algorithm creates a session key using the secret key (KT [nj). Specifically, Ks = Encrypt (R1, (KT [nj). For terminal authentication, the signature generation algorithm creates the first signature value S1h = Sig (R2, Ks). The terminal receives the first random data (R1, R2 and n) and creates a key. sessions in the same way as the host computer, using the terminal's internal secret key (KT [nj). Specifically, Ks = Encrypt (R 1, (KT [nj)).

Step 22: The terminal generates a second signature value S1t = Sig (R2, Ks), a second random data (R3) by the signature generation algorithm, and sends St1 and R3 to the host computer.

Step 24: The host computer can perform terminal authentication after comparing S1h with S1t. When the terminal is authenticated, the host computer creates a third signature value S2h = Sig (H + R 3 + Mode + Unit, Ks) and sends the third signature value to the terminal along with mode information and billing unit information. The terminal generates the fourth signature value S2t = Sig (H + R3 + Mode + Unit, Ks) and, after comparing S2h with S2t, authenticates the host computer.

Step 26: When the host computer is authenticated, the terminal transfers the billing system, encrypts the balance, i.e. Balance + ID, as M = Encrypt (Balance + ID, Ks) and sends the encrypted value M to the host computer. After decrypting the encrypted value M as Balance '+ ID' = Decrypt (M, Ks) and comparing the ID's ID, the host computer performs new terminal authentication. After terminal authentication, the balance is stored in the log file.

Finally, it will be described in detail with reference to Figure 3 of use over days, weeks or months and a command to check the timer information (to monitor unauthorized use).

Step 30: The host computer creates beer random data (R1, R2 and n) and sends the first random data to the terminal. The key generation algorithm creates a session key using the secret key (KT [nj). Specifically, Ks = Encrypt (R1, (KT [nJ). For terminal authentication, the signature generation algorithm creates the first signature value S1h = Sig (R2, Ks). The terminal receives the first random data (R1, R2 and n) and creates a key session in the same way as the host computer using the internal secret key of the terminal (KT [nj). Specifically, Ks = Encrypt (R1, (KT [nj)).

Step 32: The terminal generates a second signature value S1t = Sig (R2, Ks), a second random data (R3) by the signature generation algorithm and sends St1 and R3 to the host computer.

Step 34: The host computer can perform terminal authentication after comparing S1h with S1t. When the terminal is authenticated, the host computer creates a third signature value S2h = Sig (H + R 3 + Time, Ks) and sends a third signature value to the terminal along with the time information (Time). The terminal creates a fourth signature value S2t = Sig (H + R3 + Time, Ks) and, after comparing S2h with S2t, authenticates the host computer.

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Step 36: When the host computer is authenticated, the terminal encrypts the information file (Info) including usage data (Log), differentiated billing mode table (ModeTB), timer (Timer), balance (Balance) and identification number (ID).

The terminal encrypts Info with M = Encrypt (Info, Ks) and sends the encrypted M value to the host computer. Then there is Info = Log + ModeTB + Balance + ID. After decrypting the encrypted value M as lnfo '= Decrypt (M, Ks) and comparing the ID's ID, the host computer re-authenticates the terminal: When the terminal is authenticated, usage during days, weeks, or months and timer information is stored in the log file; checked.

The encryption algorithm for transmitting and storing the value used in the invention has been described above. The following issues should be considered for application to a real electricity meter.

The maximum number of storage meters that can be connected to a single-pole transformer is limited to 256. In a pole transformer to convert 3.3kV to 220V supply voltage, one local service and supervisory unit (LS) controls 250 storage meters. These units with different serial numbers are connected to the other side of transformers with different poles. One area service and supervisory unit (AS) connected to a maximum of 256 LS can control 65536 stored value meters. With 256 LS control, one local server in the tree can control up to 16,000,000 ASs. However, considering the performance and efficiency of the server, it is better to limit the maximum number of storage meters controlled by the local server. In the case that the signal passes through the pole transformer to the other side of 220 V, a 3-byte ID is assigned to the user of the general power line modem and micrometer modem. Micom with the Bus Encryption feature protects the encryption algorithm and encryption key, protects convenient use, or can selectively use the Secure Access Module (SAM), a subscriber identification module (SIM) type smart card. Calculating the amount of power, the stamp stack and the display can be controlled by another microcontroller. At this point, it is checked whether the liquid crystal display control and the power consumption calculation are blocked when the electricity meter communicates with the host computer. It is considered that there is a time limit for supplying time information to the meter. In particular, when it is assumed that sending time information to the family takes one second, it will take one hour to transmit time information to 3600 families. A real-time clock is introduced into the electricity meter and differentiated billing is used according to each time value. The time on the clock is at any moment

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4 repaired and tracked. Unauthorized use of electrical power is monitored, and in the event of unauthorized intrusion or disruption by connecting a power line modem to a personal computer, a digital seal is used.

Digital sealing is done systematically by software and hardware means. Digital sealing for monitoring unauthorized use of electrical power is performed by the procedure whereby the terminal transmits the energy consumption data at a particular point in time, for a certain hour period of days, weeks or aunt to the server as information of 2.44 kilobytes. The server records the information into the database, compares the recorded information with the information sent at the next point in time, and compares the result of the comparison with the total amount of electricity consumed in the same period. When a voltage is applied to the output terminal when the latch relay interrupts the power supply, this is defined as unauthorized use of electricity. Therefore, emergency information is sent to the server.

All details of the use of electricity from the server can be used as a basis for drawing up a price-bargain agreement for the new contract at a price rate given by the estimated electricity consumption for days, months or season based on the total amount of electricity consumed in hours, days, months or season.

When an interrupt circuit interrupts the power supply due to credit depletion, overcurrent interruption, interruption in a special case, or use of power by unauthorized interference with the power supply at the front of the meter, unauthorized use of power is detected by checking the presence of a voltage load .

The credit value is transmitted and stored in the electricity meter, gas meter, water meter and calorimeter via a power line modem. The credit value for electricity is stored in the SVM and the remaining values are stored in each area of the chip card electronic wallet.

Next, the structure and operation of the electricity meter constructed on the basis of the above items will be described in more detail with reference to Figures 5 to 7.

Figure 5 shows an electricity meter that transmits and stores value information via a power line modem. In Fig. 5 there is a latch relay 1 of the interruption relay type, which switches off the power supply. Shunt 2 measures alternating current (AO) with a 0.1 mQ manganese (Mn) resistance. When the latch relay is in the open position, the power consumption sensor registers normal use when the output at the sensor is "0". Terminals 1s and 1L are blocked and the electrical power is used in an unauthorized way when the output on the sensor is equal to "AND". The buzzer 4 requires a new SVM credit value mark after the balance changer 10 has been consumed, thereby guiding consumers through the transmission and storage of the credit value for electricity. The credit and value added smart card 5 records the smart card user's serial number (CSN) in the control database on the basis of the master key of the electricity reseller managing the credit value meter of the invention and checks the credit value transfer on the server presence of a registered legal CSN. This prevents unauthorized use of electricity.

The voltage divider 6 adapts the AC voltage of 117, 220 and 240 V to the input voltage range of the analog-to-digital voltage converter (abbreviation: V - ADC). The voltage range is selected by the ratio of two resistors connected in series. Analog-digital voltage converter (V-ADC) is a circuit for converting an analog AC signal to a 16-bit digital signal. Analog-digital current converter (abbreviation: 1-ADC) 8 is a circuit for converting an AC signal that flows through shunt 2, The 16-bit or 20-bit digital signal The power consumption operating circuit 9 calculates the power (in watts) by multiplying the digital signal from the V-ADC 7 by the digital signal from the l-ADC 8 and converts the multiplication result to a frequency and pulse width signal. The power consumption 9 compares the voltage phase to the current phase, calculates the angle by which the two phases differ, and outputs the phase difference as a signal, applying different billing for items that are currently using inductive loads. according to the amount (watt / hour) of electricity consumed per unit After the stamps in the seal changer are consumed, it will request new stamps from the stamp stack to ten units and reduce the status of the new stamps according to the amount of energy consumed. When the ten-stamp cartridge is used up, the SVM will request 100-unit stamps as described below, and the 10-stamp cartridge will be refilled. The grades required for SVM 166 can be obtained based on the SAM 164. Authentication process. Using the RTC and the Energy Consumption Mode Table Ή, differentiated electricity billing is performed in a 50%, 75%, 100%, 150% power and demand ratio and 200% based on real-time clock containing items: year (Y), month (M), day (D), hour (H), minute (M) and second (S ^ in the form (YYMMDDHHMMSS)).

ISO 7816 compliant card reader / writer ^ is a communication port consisting of eight terminals defined by ISO 7816, part

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142, containing Vcc, Cík, DIO, Reset and Gnd for synchronous and asynchronous communication with the smart card. Multipurpose credit values for the measurement of electricity, gas, water, hot water, heat and pay-TV are recorded on a single smart card by inserting a commonly issued smart card in an on-line or off-line meter. After recording the value sent from the gas supplier's service server via the electricity meter to transmit and store the value on the smart card, the chip card is removed and inserted into the gas meter to which the value information is transmitted, thereby reducing the value information on the card according to the amount of consumed. The transmission and storage meter can therefore be operated in off-line mode.

Modenrypro power line performs data communication over power line. Each modem is set to one of the 256 ID addresses of the high-power line (Pt-MID) modem. The AC / DC power supply 14 supplies the operating voltage required by the stored value electricity meter. The three-byte ID, which is the internal number of the stored value meter, is recorded in the ROM during the process. The nonvolatile memory 15 in the form of a readily erasable memory records the power consumption situation over a period of time, i.e., 24 hour power consumption data can be found by recording an electricity meter by storing a value as 16-bit information every sixty seconds; weekly electricity consumption by adding up the total daily electricity consumption and monthly electricity consumption data by adding up to thirty total daily electricity consumption, monitors unauthorized use of electricity or unauthorized electricity consumption from a remote location and performs an electronic seal. An encrypted bus 16 comprising a core processor (CPU) 162, a secure access module (SAM) 164 for storing an encryption key, and an encryption algorithm for storing a credit value along with a prd value storage (SVM) 166 for storing credit value prevents production and misuse. credit value, system disruption, and cryptographic attack. The liquid-crystal display shows the credit value balance, the value transfer status, the real-time power consumption situation and the accumulated power consumption situation so that the user can visually differentiate them. The input and output terminals of the power line consist of 1s, 2s, 2L and 1L for interconnecting the input and output lines of the electrical power and protecting against physical disruption of the system.

Lightning arrester 19 is a lightning or shock voltage absorption circuit.

Above has been described an electricity meter for measuring electrical energy of a certain type.

However, after connecting the voltage divider 6, V-ADC 7, 1-ADC 8, the latch relay 1 and the shunt 2 according to the type of electrical energy, the electricity meter according to the invention can measure at least two types of electrical energy. When combining a voltage divider, a VADC, a 1-ADC, a latch relay, and a shunt so that at least two types of different voltage sources can be selectively or simultaneously used, individual current sizes can be measured and controlled.

The following is a description of the operation of the meter with value storage, which is compiled according to the above instructions. As noted above, the power supplier or power dealer stores the credit value of the host computer to the SVM 166 of each terminal by storing the credit value via moderrycro power line, each meter accounting for the amount of power consumed based on the operating circuit power requirement. The energy f f compares the calculated amount with the credit value information stored in the SVM 166 and calculates the amount by a mark changer 10. When the balance in SVM 166 does not exceed a certain value, the user is informed of the balance by the buzzer sound. If the balance is insufficient, the credit value is sent as described above to store the value from the host computer to the SVM 166 or power is interrupted by the latch relay 1. The credit value information can be stored in the SVM 166 based on the communication between the host computer and the storage meter of the value meter of the invention. However, the power value information stored on the smart card 5 may be sent to the SVM and stored in the SVM by storing the smart card of the meter, gas, water or calorimeter of the family or business on which the legally issued amount is recorded. to a value storing electricity meter according to the invention.

Thus, the electricity meter of the invention displays information such as monthly consumption and card balance on liquid crystal displays installed using a certain amount of power within the range recorded in the SVM, and when the card has a balance not exceeding a certain value, the buzzer 4 is triggered. asks the server to transfer the credit value. The credit value is automatically transferred from your account as agreed with the bank or the payment is processed by credit card. The value of electrical energy is received online via the power line and stored in SVM 166. The value is reduced by the amount of energy consumed.

The electricity supplier and retailer can therefore save on costs by eliminating the need for meter reading, insertion and consumption calculation.

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O 4444 444 44 444 44 4 Quantity and printing and sending of bills. The electricity bill is paid in advance. The account can also be reduced by interest on prepayment or by using different billing according to the time of use of electricity or the costs saved based on the difference between the purchase price of electricity and the sale price of electricity. The electricity retailer can thus create high added value.

To prevent the use of cards other than smart cards legally issued by the power supplier or power supplier, the SAM 164 is inserted into the meter and issues a card authentication. When the card is inserted into the terminal, the terminal and the card perform mutual authentication. When the amount of money on the card is transmitted by the terminal as a credit value, the terminal operates according to the encryption procedure shown in Figure 1.

This can prevent the use of a counterfeit card. A procedure where the encrypted key expires upon disassembly of the meter to render the terminal inoperative can be considered a defense against cryptographic disruption by attacking the system, for example, when attempting to disassemble a stored value meter for the artificial manufacture of a terminal or card. However, the encryption algorithm and the encrypted key in the terminal only have a quantity reduction key in which the credit value information is reduced according to the amount of energy consumed. It is therefore not possible to increase the amount of money or credit value information. In particular, in the invention, when a user or subscriber connects to an APS server for a credit value transfer by telephone or via a digital intercom device, the amount used is selectively offset using a credit card or bank account. The value transfer process begins with the extent to which payment is guaranteed. The process can also be carried out over the Internet The value can be transferred automatically, especially if the value stored under an automatic account transfer agreement between the electricity supplier or its dealer and the financial institution is limited to a certain amount. It is also suitable for those who have no experience with computers or information communication networks. Especially in the case of a payment order via the SET e-commerce process with a direct payment card, the server acting as a cyber partner can enter the trade data into a digital envelope (DE), thereby signing the trade data. The trading process cannot therefore be refused or falsified.

Hereinafter, the embodiment of the process and the conditions according to the above invention will be described in detail.

1) Procedures for Creating, Transferring and Storing Credit Value ·· · »··

I 9 Λ

999

Information ο credit value is generated by communication and operation of the customer's control database using the master key (Mk) of the seller or supplier of electricity. The subscriber ID number required by the LAN power modem is dialed through the regional service and supervisor (AS) and the local service and supervisor (LS). When both the Subscriber ID and Communication ID requests are complete, the legality of the server and terminal is verified by the above authentication procedure. After authentication, the requested credit value information is converted. The credit value information sent over the power line is stored in the value storage module (SVM).

2) The procedure of transferring and storing added value

The efficiency of the invention can be increased by adding an added value conversion function that the smart card can use for electricity meters, gas meters, water meters, calorimeters and hot water meters operating offline without a separate communication line. The creation and conversion of added value is accomplished by the above procedures for generating and converting value. The added value is not stored in the electricity meter but on the chip card. The value added information for gas, water, hot water and thermal energy stored on the smart card can be operated and entered into the smart card water and gas meters in off-line mode compatible with the smart card described in the patent applications of the Republic of Korea no. 98-6947 and 98-6948 filed by the same applicant. This maximizes steering efficiency.

3) Credit Value Information

The status of the credit value information stored in the SVM 166 decreases in the mark changer 10 according to the amount of energy consumed. Grades are reduced by several milliwatts, a few watts or kilowatts per unit of time. When the minimum grade for the grade is exhausted, the credit value information will decrease as a result of requesting a new grade.

4) Using a differentiated rate for energy consumption

Power consumption mode, where multiple electricity usage rates may be differentially applied according to time zones based on days of the week, weekends, seasons and months at which the credit value is selected by the program and automatically applied. In the table of energy consumption mode, select different rates according to time zones and characteristics of supply and demand for electricity, power supply and its use. For example, real-time clocks benefit from 100% on weekdays during the day, 75% off before and after weekdays, 50% off at night, 200% off during normal hours ··· t ·

999

-18 working days and an increase of 300% between 2pm and 4pm during the summer, when air conditioning is much cleaner. Since separate TOs are used for the same amounts of electricity used, the stored credit value is applied differentially. The power consumption is therefore optimized in each time zone. This maximizes the efficiency of supply and demand for electricity. The electricity bill will therefore be lower.

5) Balance check and automatic interrupt - '»',,

The credit value information is displayed on the display. eg on a liquid crystal display so that the user can check the balance at any time. When the credit value is exhausted, the stamp changer informs the user that the last stamp is consumed by an alarm with an audible frequency. If the credit value is not recharged before the last mark is consumed, an interrupt signal is sent to the latch relay connected in series with the power line and the power supply is interrupted.

The above-mentioned implementation procedures and conditions of the invention also satisfy the invention in conjunction with various gas and water meters, as long as it is possible to transfer the added value by a smart card using a value-converting meter and storing a value without the meter reading. Then it will have the following structure and will follow the stated principles.

The storage meter of the present invention measures the voltage (V) and current (A) in real time, calculates the amount of power (W) using the power consumption circuit, measures the power consumption per unit of time, converts the stored value information into stamps, reduces the state of the stamps according to lo.

the amount of electrical energy consumed per unit of time in the converter and requests new credit value information when the status of the stamps is exhausted. Also, all information that the user should know, such as the amount of credit value remaining and the power consumption status, is shown on the liquid crystal display ^ / When the last credit value information is converted to stamps, the user is informed by sound alarm with audible frequency. The credit value is then recharged. When internal credit value information is exhausted, power is turned off by interrupting latch relay 1.

In the Table of Power Consumption Mode (MT), based on which it is possible to use a differentiated rate of power consumption of at least five degrees, the real-time clock (RTG) applies a differentiated rate of power for different degrees, e.g. 50%, 75%, 100%, 200%, and 300% by time zone, and carry a credit reduction. Thus, although it is »19 · · ···

the unit of time still consumes the same electrical energy, the SVM credit value decreases differentially as it changes the grades 1Ό using different degrees of the electricity tariff according to the time schedule defined by the rate scheme table. The power consumption is thus optimized in each time zone. The supply and demand for electricity are thus well balanced. Different levels of electricity billing give consumers the possibility to benefit from discounts. E.g. a discount for night hours in which the supply of electricity is excessive, can provide a special reduced energy supply rate. When air conditioning is used intensively in offices in summer, a higher rate is charged and the thermal energy storage system is triggered. Therefore, it is possible to offer a discount to electricity consumers in both homes and businesses.

The value storage meter of the present invention has an encrypted data bus whose base processor 162 or internal memory cannot be read by an unauthorized person, thereby avoiding the artificial creation and kn / pto violation of the stored value. The storage meter consists of a secure access module K4 (SAMUlgK into which a secret internal key (KT [nJ) and encryption algorithm can be inserted) and a storage value module (SVM) JJ 'If a system intruder or encryption intruder attempts to disassemble the meter and artificially assemble The SAM, SVM, and master key (Mk) of the host computer perform mutual authentication so that SAM and SVM can convert and store the credit value information using the master key procedures above. When a smart card is inserted in the meter, after the card reset signal is sent, the reset response signal (ATR) is received, the chip card and the terminal perform mutual authentication, the credit value information is exchanged between SVM and SAM, and credit information is calculated value for the legal use of a smart card The credit value information is recorded by a separately encrypted card issuer master key (Mk). Therefore, it is not possible to increase the credit value. These procedures shall be performed in accordance with International Standards (ISO) 7816 Part 1, Part 2, Part 3, Part 4, Part 8 and Part 10 and shall relate to the physical standard, electrical signal, communication protocol and encryption procedure. at least two encrypted keys stored. One encrypted key is updated after a certain amount of time. The encrypted key is used selectively. This prevents unauthorized use of the credit value.

The transfer of credit and value added and the monitoring of the legal use of value are carried out via a power line modem. It is used

A circuit with an energy consumption sensor, wherein the energy usage information is recorded in a non-volatile memory 15 to monitor unauthorized use of electricity and prevent unauthorized use. It is not necessary to visit the place where the electricity meter is installed nor to check the intact seal. Such a circuit can be periodically monitored by LS or AS, thereby performing an electronic seal without having to check the physical lead seal.

The storage meter has a three-byte storage meter number (SVPMSN). The power line modem 36 communicates with the LS by addressing the modem identification number (M-ID) 1/256. When the dealer or power utility server registers the value conversion request, it initiates short-range communication with the electricity meter to store the value of that customer based on the addressing procedure for selecting the customer M-ID.

The customer requests a credit transfer by contacting the ARS of the power seller or power supplier by phone or digital intercom device 20 and keyboard 21 to collect credit card or bank account payment and to choose to pay the converted credit value for electricity. Then, the credit value management server is asked to transfer the credit value from the account number entered by the credit card company. The electricity seller's credit value management server invokes the M-ID via AS and LS, transfers the credit value to the stored value electricity meter, and stores the converted credit value by performing the above storage procedures.

LS selectively monitors the state of power consumption of up to 256 stored energy consumers via a power line modem connected to a 117V / 220V power line at a maximum distance of 3 km. LS gradually calls the meters with value storage with address 1/256 ... n / 256, checks and adjusts the status change of the meter's internal hours with value storage in real time, controls the rate system mode, checks CSN cards, backs up credit balance, checks any unauthorized and atypical use of electricity and establishes a record of electricity consumption over days, weeks or months, thereby summarizing and estimating electricity demand. The results of the summary and estimation are used as a guide for negotiating the purchase price of electricity and re-setting the prices of the supplied electricity.

When converting and storing values from gas, water and heat and hot water meters other than electricity meters, the meter is used in • off-line mode working with the smart card without a separate communication line, as these environments place greater demands on installation and the design of the line is then very complex. When the value added information transferred via the stored value meter is stored on a smart card and the smart card is inserted into a water meter, gas meter or heat meter, the added value information is stored in each meter. By the same value reduction procedures, the status of the stamps is reduced. When the credit value information is exhausted, the gas, water, heat or hot water shut-off valve closes. The efficiency of the invention with value added conversion is higher when value conversion can be utilized and the meter value stored with the value added service. The creation and transfer of added value is accomplished by the above procedures for generating and transferring credit value. The added value is not stored in the electricity meter but on the chip card. The value added information for gas, water, hot water and heat energy is stored on the smart card by the procedures described above and can be converted to off-line meters and smart meters that accept the smart card and are described in Korean patent applications No. 98-6947 and 98-6948.

Next, a credit transfer request and the associated procedures for a power line modem will be described with reference to Figure 6.

“£ 2 ·

The Jgg's chip card is issued to those who request it, based on the main key card of the system manager of the electricity supplier 50 After settling the credit value for electricity, gas, water, hot water and thermal energy in cash or on site, smart card stored the first credit value. The credit value for the electricity on the card is stored in the meter upon insertion of the smart card into the user's stored meter 55. When a smart card is inserted into the gas meter, water meter, hot water meter or thermal energy meter of the user 55, a credit value is stored in each meter. After the first credit value has been stored, a further credit or added value is stored by the power line modem conversion procedure. Conversion and storage of values can be carried out by telephone, via the Internet, via the P-ATM terminal (EMV'96) and within the stored value electricity meter. Conversion and storage of the value is performed using the above encryption algorithm. The credit value and value added channel is described as follows. The customer record information is taken from the customer database on the energy supplier host server 50. Payment to a bank or VAN company is guaranteed - the user chooses to pay by credit card number, direct payment by card number, or payment via bank account number. credit value information is encrypted by master key • · 0 · · 0 • 0 ·

0 0 0

ALONE. The stored value ID of the meter is called via the AS and LS networks. The SAM and master key perform mutual authentication. The credit value or value added information is then transferred. The Local Supervisory Unit (LS) introduces a record of hours of use, hours, days, weeks, or months from the meter to store value, monitors the usage status and daily or monthly credit value balance, performs a new time setting, introduces a mode and program utilization of electric energy and monitors unauthorized and atypical users, eetectic energy. In a similar manner to the above processes, the amount of money is also calculated between the systems for calculating the amount of money.

Fig. 7 is an enlarged perspective view of the external shape of the stored value meter according to the invention. The storage meter of the present invention includes a liquid crystal display at the top of the front surface at the bottom of the front surface of the input and output terminal 66. The input and output terminal 66 is connected to a power line for input and output of electricity and protected by a housing. against unauthorized use 64. At the top of the surface of the tamper-proof housing 64 is a digital intercom device 20 and a keyboard 21 for entering value conversion. On one side of the meter there is also a socket for inserting a smart card into which the smart card is inserted. A credit value is stored on the smart card, which is read from the smart card when the card is located in the smart card insertion slot 18. The meter also includes a tamper proof seal and disassembly for sealing the meter against misuse.

As described above, the invention has been described only with respect to a power saving meter operating via a power line modem. Via a power line modem, the terminal server can exchange the necessary information with each other. Instead of a power line, a general telephone line, a high-frequency communication line relay or a cable TV can be used.

As mentioned above, according to the invention, personnel costs can be reduced, since there is no need to read meters for electricity, gas, water and heat and to calculate operating costs, print and send bills, which also eliminates postage costs.

Losses due to unpaid utility bills and arrears can also be reduced and value added can be generated because: · · · · f · f f 4 f f f f f f ·· The credit value is paid by credit card or bank account in advance. The electricity supplier can therefore create high added value.

Industrial applicability

The invention discloses a combined electricity meter that can solve the economic and safety problems associated with visiting installation sites and visual inspection of conventional electricity meters at a remote location.

Claims (17)

PATENT CLAIMS 1. A method for storing credit information in a value storage module in a value storage meter based on communication between the host computer and each terminal via a power line modem contained in the value storage meter which is a terminal comprising: steps: a) generating the first random data by the host computer, sending the first random data to the terminal, creating a session key by the key generation algorithm using the internal secret of the terminal, creating the first signature value by the signature generation algorithm for comparison during terminal authentication and receiving the first random data by the terminal; Create a session key in the same way as a host computer b) generating a second signature value by an algorithm for generating the signature and second random data and sending the second random data to the host computer; c) comparing the beer and second signature values and authenticating the terminal with the host computer, the host computer generating a third signature value and sending the third signature value to the terminal with the amount of money, receiving the third signature value and the amount of money from the host computer , creating a fourth signature value and authenticating the host computer by comparing the third and fourth signature values and d) increasing the value by the terminal after decrypting the money amount and sending the value obtained by encrypting the balance and the terminal ID using the encryption algorithm to the host computer, receiving the encrypted value by the host computer, decrypting the encrypted value, comparing the stored terminal ID with the decrypted after the backup file balance authentication has been performed. • · · · The method of claim 1, further comprising an electrical energy conversion conversion system comprising the sub-steps of: a) generating the first random data by the host computer, sending the first random data to the terminal, creating a session key by a key generation algorithm using a characteristic secret key of the terminal, creating the first signature value by the signature generation algorithm for comparison during terminal authentication and receiving the first random data by the terminal; Create a session key in the same way as a host computer b) generating a second signature value by an algorithm for generating the signature and second random data and sending the second random data to the host computer; c) comparing the first and second signature values and authenticating the terminal with the host computer, the host computer generating a third signature value and sending the third signature value to the terminal with mode information, receiving the third signature value and mode information from the terminal by the terminal and fourth signature values; and d) authenticating the host computer by the terminal by comparing the third and fourth signature values, wherein the terminal converts the rate system, generating the encrypted value obtained by encrypting mode information and the terminal ID using an encryption algorithm to send the encrypted value to the host and receiving the encrypted value by the host; values, comparing the stored terminal ID with the decrypted terminal ID, re-authenticating the terminal, and after performing the backup file balance authentication. The method of claim 2, further comprising a step with a usage information control command comprising the sub-steps: a) generating the first random data by the host computer, sending the first random data to the terminal, creating a session key by a key generation algorithm using a characteristic secret key of the terminal, generating a first value signature by an algorithm for generating a signature for comparison during terminal authentication and receiving the first random data by the terminal and creating a session key in the same way as the host computer, b) generating a second signature value by an algorithm for generating the signature and second random data and sending the second random data to the host computer; c) comparing the first and second signature values and authenticating the terminal with the host computer, the host computer generating a third signature value and sending the third signature value to the terminal with time information, receiving the third signature value and time information from the terminal, fourth signature values; and d) authenticating the host computer by comparing the third and fourth values of signing and sending the value obtained by encrypting the usage file data using the encryption algorithm and sending the encrypted value to the host computer and receiving the encrypted value by the host computer, decrypting the encrypted value , re-authenticating the terminal, and after performing authentication, backing up usage information over days, weeks and months, and a timer in the log file. 4. A storage meter comprising a power line input and output terminal for measuring the amount of electrical energy consumed, comprising: the operating part of the power consumption to measure voltage and current on the power line and calculate the power consumption; a power line modem for data communication between the host computer and the terminal over the power line; • Security part including a basic processor (SAM) secure access module (SAM) and an encryption key and a value storage encryption algorithm and a value storage module (SVM) to prevent value information from being exploited and exploited by an intruder, except for cryptographic a SAM authentication process is required from the SVM to request a mark; a latch relay for interrupting power supply according to the SVM balance; and a stamp changer for reducing the stamp based on the input of value information from the SVM according to the amount of electricity consumed per unit of time; The storage meter of claim 4, further comprising a chip card reading and recording portion allowing its use for other meters such as water meters, gas meters and calorimeters, by inserting the chip card into the meter, receiving value from the host the computer in the on-line mode by recording the received value on the inserted smart card and reading the received value from the smart card. 6. The storage meter according to claim 5, wherein the smart card reading and recording portion is preferably used for water meters, gas meters and heat meters working with the smart card offline by recording on the smart card via a modem. added value eg for gas and water, where the card can store the electricity value based on a communication port containing eight terminals defined by ISO 7816, part 2, with Vcc, Clk, DIO, Reset and Gnd functions for synchronous and asynchronous communication with smart card. 7. The storage meter of claim 4, further comprising: AC to DC converter for supplying the operating voltage needed for the meter, an energy consumption sensor indicating the normal state of power usage when the sensor input is 0, while the sensor is 1, the terminals are blocked and power is being used in an unauthorized manner and -28 buzzer to generate an audible alarm prompting the user upon receipt of the last stamp, requesting a new stamp from SVM, and exhausting the stamp changer balance to transfer and store the value. 8. The storage meter of claim 4, wherein the operating portion of the power consumption system preferably includes a shunt for measuring AC current, a voltage divider for series connection of two resistors, and a choice of voltage range given by the ratio of the two resistors to accommodate the AC voltage. lines within the voltmeter input voltage range, an analog-to-digital converter to convert the AC signal that flows through the shunt to a 16- or 20-bit digital signal, and an analog-to-digital converter to convert the AC voltage to a 16-bit digital signal, it compares with the current phase and calculates the angle by which the two phases are offset from each other and the output as a signal for applying differentiated rates. The storage meter of claim 4, further comprising a power consumption table in the form of a multi-stage differentiated power rate mode table of 50%, 75%, 100%, 150% and 200%, respectively, and electricity demand based on real-time clocks containing year, month, time, minutes and seconds. 10. The storage meter according to claim 4, comprising a nonvolatile memory in which characteristic 3 bytes of the ID number are stored and the state of the electrical power over a certain number of hours, days or months is recorded for remote monitoring of unauthorized or atypical use. electrical energy and performing the electronic sealing function. 11. The storage meter of claim 4, comprising a liquid-crystal display for visual display of the present value, value conversion, real-time power consumption status, and storage power usage conditions. The storage meter according to claim 5, wherein the storage meter can be used for a simple and -29 Reliable payment of fees by the Electronic Business Transaction (SET) procedure using the next generation of EMV'96 credit and direct payment cards in combination with a smart card reader and recorder, and includes: devices such as a telephone, the Internet, a P-ATM (EMV'96) terminal and a digital intercom device, for audio communication with the person serving the host server, or sending an audio message to assist the user, e.g. who wants to save the value directly. 13. The storage meter according to claim 4, wherein the input and output terminals of the electricity meter of the meter, preferably comprising a housing and a physical seal against violent intrusion, prevent unauthorized and atypical use of electricity. 14. The storage meter of claim 4, further comprising a lightning arrester circuit for absorbing lightning or shock voltage on the power line of the supplier. 15. The storage meter of claim 4, wherein the power line of the transformer to reduce 3.3 kV to generally used voltage further comprises a current transformer to measure the total amount of current, wherein the electricity meter is coupled to the local service and supervisory units. (LS) with modems for communicating with a maximum of 256 electricity meters, storing value on power lines, and with regional service and supervisory units (AS) to control a maximum of 256 LS. 16. The storage meter according to claim 15, wherein: the host computer further comprises a server for resellers and power suppliers for issuing a smart card to a customer, wherein the smart card containing the master key performs automatic value transfer when the user requests value storage, monitoring and controlling the legal use of value by the customer, adding and analyzing detailed electrical state Each server connected to different ASs controls and monitors the M&A meter that can be connected to the AS and LS in the tree structure, and stores the value in the M&A meter. 17. The storage meter of claim 15, further comprising a voltage divider, anaiogo-digital voltage converter, an analog-digital current converter, a latch relay, and a shunt, such that when at least two kinds of electric power sources use the voltage in a selective manner; they use at least two types of voltage simultaneously, individual current sizes can be measured and controlled separately.