KR101093611B1 - Method and system for remote meter reading - Google Patents

Abstract

PURPOSE: A remote metering method and a system thereof is provided to obtain reliable and safe metering data based on the high security of a mobile network. CONSTITUTION: An outdoor display part(105) displays an energy consumption amount to check the energy consumption amount at a consumer house by reading the energy consumption amount from a meter. The outdoor display part transmits the energy consumption amount in a radio data signal. The meter displays the energy consumption amount of a consumer in a metering area. A local area wireless personal communications network apparatus helps an area, on which an electric wave does not affect, to have the electric wave by amplifying the radio data signal received from the outdoor display part. The local area wireless personal communications network apparatus includes a relay(103) and a concentrator(101_1-101_n). The relay extends and expands a transmission range. The concentrator collects data about the energy consumption amount by receiving the radio data signal from the outdoor display part and the relay and transmits collected data to an operation center.

Description

Method and system for remote meter reading

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and system for remotely reading energy usage such as electricity, water, gas, and heat (heating), and more particularly, a wireless personal area (WPAN) which is an RF fixed network. The present invention relates to a remote meter reading method and system that provides high security and compatibility, and can be networked more efficiently and at low cost by combining a metering method using a network and a PDA (Personal Digital Assistants).

The method of metering energy usage such as electricity, water, gas, and calorie (heating) in the past can be read every month by the meter reader, checking the meter, reading the accumulated value, writing it in the meter reading record, and entering it into the computer. The billing process was billed through bills, and this direct reading method is still used in some areas.

On the other hand, in the above-described direct reading method, a method of inputting to a PDA is used instead of writing it to a reading recorder. Many complaints are occurring.

As a result, the method of using the internet network is also considered. However, the flexibility of constructing an appropriate type network according to the local environment, the security problems of using the IP (Internet Protocol) network, and the different metering systems The compatibility problem for using the metering system integrated server among companies that provide a solution remains to be solved.

Accordingly, an object of the present invention is to improve the problems of the conventional reading method, such as direct reading meter reading, direct reading PDA reading, wireless PDA reading, fixed network meter reading, remote, which can provide high data security and compatibility between various reading systems The present invention provides a method and system for meter reading.

In addition, another object of the present invention is to implement a remote metering method and system that can satisfy the criterion of the poorest water metering environment in the network construction environment of the metering system for reading the energy consumption, such as electricity, water, gas, heat (heating) To provide.

In addition, another object of the present invention is a wireless meter reading method and system that is resistant to obstacles and noise for high data reliability, meter reading rate, system stability in a wireless environment, ultra-low power data communication to maintain a steady state for a long time by battery operation To provide.

In the remote meter reading system according to the present invention for achieving the above objects, in the system for reading the energy usage in the remote operation server, the reading is read from the meter indicating the energy usage to display the usage at the customer An outdoor indicating unit for transmitting a wireless data signal; A repeater which amplifies the radio data signal received from the outdoor indicator to overcome the radio shadow area and extend and extend the transmission distance; A concentrator that receives the wireless data signal from the outdoor indicator and the repeater in the meter reading area, collects data, and transmits the collected data to the operation server; A modem pool system providing a modem-to-modem channel between the concentrator and the operations server; And an operation server for collecting the data and state information of each device from the concentrator and storing and managing the data in a database.

At this time, the remote meter reading system according to the present invention is characterized in that it further comprises a PDA for setting the setting information of the outdoor indicator, repeater, concentrator and read the amount of usage from the outdoor indicator during meter reading.

In addition, the remote meter reading method according to the present invention for achieving the above object, in the method of reading the energy consumption of the metering area in the remote operation server, the radius of the metering area according to the environmental characteristics of the metering area Using outdoor indicator and repeater that converts cell into 1km, reads energy consumption from meter of neighboring customers around the concentrator installed at the center of the cell, displays it for viewing by customers, and transmits it as wireless data signal. Establishing a short range wireless personal network (WPAN); Transmitting, by the concentrator, the usage of the meter to a modem of a modem pool system connected to the operation server through a modem; And transferring the usage amount of the meter received by the modem pool system to the operation server.

At this time, the remote meter reading method according to the invention, characterized in that it further comprises the step of reading the energy consumption by using a PDA from the meter of the consumer not established the short-range wireless personal communication network to the operation server.

As described above, the present invention has the advantage of obtaining secure and reliable meter reading data based on the high security of the mobile network.

In addition, the present invention has the advantage that it is possible to build a flexible meter reading network at a lower cost in a mixed manner and efficient network operation.

In addition, the present invention has the advantage that can be combined with various sensor network applications in addition to the field of metering by the development of a stable and reliable network construction solution.

In addition, the present invention has the effect of enabling the centralized management of the domestic meter reading method by increasing the compatibility between the domestic and international meter reading business enterprises.

In addition, the present invention can select the appropriate operation method by analyzing the local characteristics and radio wave environmental characteristics of the meter reading area, even if you choose to build any one, the local environment changes over time due to building construction and development, etc. over time Even if there is a need to change the method, there is an advantage that can be changed flexibly at any time.

1 is a block diagram of a hybrid meter reading service network of the remote meter reading system according to the present invention,
2 is a PDA reading signal processing according to the remote meter reading method of the present invention,
3 is a timing diagram of a transmission / reception operation of an outdoor indicator according to a remote meter reading method according to the present invention;
4 is a configuration diagram of the meter network according to the prior art,
Figure 5a is a block diagram of the interior of the outdoor indicator of the remote meter reading system according to the present invention,
Figure 5b is an internal block diagram of a repeater and a concentrator of the remote meter reading system according to the present invention.

The remote metering method and system according to the present invention is a cell according to the environmental characteristics of a particular metering area (Cell) to a radius of about 1km (Cell), using the outdoor indicator subsidiary repeater of the surrounding customers around the concentrator installed in the center of the cell It is characterized by using WPAN as a method of remote meter reading and PDA meter reading.

In particular, the remote metering method and system according to the present invention is a PDA reading method to establish a WPAN through a repeater in the center of the concentration of customers in the cell, the remote areas do not include the WPAN in the vicinity of the customer in the PDA It is characterized by the use of.

In addition, the remote metering method according to the present invention is a method of using only the WPAN meter according to the construction environment, a method of using only the PDA meter and the two when reading the energy consumption of electricity, water, gas, calories (heating), etc. from a remote place Since three ways of using a branch can be used, it is possible to build a network with higher security and compatibility, more efficient, and lower cost than a conventional meter reading method.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description of preferred embodiments of the present invention will be given with reference to the accompanying drawings. It should be noted that the same components in the figures represent the same numerals wherever possible. Specific details are set forth in the following description, which is provided to provide a more thorough understanding of the present invention. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

First, Figure 1 is a mixed meter reading service network configuration diagram of a remote meter reading system according to the present invention, referring to Figure 1, the remote meter reading system according to the present invention is large meter reading device 100 and AMI (Advanced Metering Infrastructure) operation center And a wireless network 300 connecting them. The meter reading area device 100 is a WPAN composed of ZigBee, UHF, PLC (Power Line Communication), the wireless network 300 is a broadband network such as CDMA, GSM, GPRS, WiBro, IP network, the AMI operation center ( 200) is an operational sensor operated by a utility company such as a local government, water resources corporation, city gas corporation, district heating corporation, etc.

WPAN used in the present invention is resistant to obstacles by using ultra high frequency (UHF) ultra-high frequency (UHF) band, and is a modulation method of DSSS (Direct Sequence Spread Spectrum), FSK (Frequency Shift Keying), GMSK (Gaussian Filtered Minimum Shift Keying) It is strong against noise by applying either.

The meter reading area device 100 includes an outdoor indicating unit 105 (TM), a repeater (103, R), a concentrator (101_1 to 101_n, DGU # 0 to #n), and a PDA (107) installed in various meters (109). The AMI operation sensor 200 is composed of a modem pool system (220, MPS), operation server 210 and billing server 230. The billing server 230 charges an energy usage fee according to the usage history calculated by the operation server 210. The operation server 210 is provided with a server console or operation terminal 211.

As shown in Figure 1, the network configuration of the meter reading area is installed by connecting the outdoor indicator 105 to the meter 109 of each consumer in a cell of about 1km radius around the concentrator 101_1 ~ 101_n, and concentrated If the communication with the devices 101_1 to 101_n is good, the outdoor indicating unit 105 configures the network to connect directly to the concentrators 101_1 to 101_n. Otherwise, the relay 103 is selected by selecting an appropriate position in the radio wave environment. And configure the network through the repeater 103 installed.

On the other hand, the densely populated area 110 in which the customers are concentrated in the cell constitutes a network as described above, but a few consumers in the remote areas 120 are separated from the concentrators 101_1 to 101_n by the number of repeaters 103. Remote installation of the whole by installing more steps is not economical due to increased installation costs. Therefore, as shown in Figure 1, the remote area 120 is included in the network to perform a PDA reading without operating remotely.

FIG. 2 is a diagram illustrating a PDA reading signal processing according to the remote reading method of the present invention. Referring to FIG. 2, the PDA reading method according to the present invention will be described in detail. First, when the PDA 107 transmits a discovery signal at a predetermined period (S01). In response to the search signal, the outdoor indicating unit 105 wakes up and waits in the sleep mode periodically. Subsequently, when the PDA 107 transmits the unique number of the customer to be read (S03), the outdoor indicating unit 105 transmits the data collected by the meter 109 to the PDA 107 according to the received customer number (S05). On receipt of the confirmation signal Ack from the PDA 107 (S07), the display apparatus returns to the low power mode standby mode.

3 is a view showing an example of the timing of the transmission and reception operation of the outdoor indicator according to the remote meter reading method of the present invention, referring to Figure 3, the outdoor indicator 105 first performs a meter reading every 6 hours according to the number of readings four times daily 4 times per day x 30 (31) = 120 (124) readings. In addition, the outdoor indicating unit 105 searches for and reads the reading signal of the PDA 107 every 5 seconds from 06:00 to 21:00 on the monthly reading day between 25 and 31 days.

Each device constituting the remote meter reading system according to the present invention shown in FIG. 1 includes a functional unit as shown in FIGS. 5A and 5B. Figure 5a is a block diagram of the interior of the outdoor indicator of the remote meter reading system according to the present invention, Figure 5b is a block diagram of the internal repeater and the concentrator of the remote meter reading system according to the present invention.

As shown in FIGS. 5A and 5B, the outdoor indicating unit 105, the repeater 103, and the concentrators 101_1 to 101_n include the MCUs 501 and 511, the wireless modem units 503 and 513, and the RTC 505. 515, Real Time Clock) and power sources 509 and 519 are commonly included. In particular, each device of the remote meter reading system according to the present invention must be equipped with accurate RTC (505, 515) for time synchronization, low power operation in the network, the outdoor indicator 105 for low power operation through the RTC (505) In addition to the transmission / reception time, the device operates in the sleep mode and in the wake-up mode for the PDA reading of the reading during the predetermined reading time.

Each component of the remote meter reading system according to the present invention is based on the ultra low power design for the hardware of the components to enable ultra low power data communication that can be operated normally for a long time of 8 years or more, and the low power control and efficient low power data It is designed with low power MAC protocol and low power meter operation structure for communication.

In addition, as shown in FIG. 5A, the outdoor indicating unit 105 includes a meter interface 507 to receive data from the installed meter 109, and can check the data received from the meter 109 at a customer. LCD block 508 is provided so that the power source 509 uses a primary battery.
On the other hand, as shown in Figure 5b, the repeater 103 and the concentrator (101_1 ~ 101_n) is a WAN modem unit for communicating with the modem pool system 220 of the AMI operation center 200 through the wireless network 300 517, the power supply 519 is used by combining a solar cell and a secondary battery, and further includes a large-capacity flash memory 518 for storing meter reading terminals or repeater information managed in a cell.
As mentioned above, the remote meter reading system according to the present invention has to pull a separate power line when using AC power, and solves a difficult problem that may occur when installing a power meter that integrates the amount of power used in the concentrator. In addition, all components other than the operation server 210 do not use the AC commercial power for ease of installation and operation in the actual use environment, and the outdoor indicator 105 is driven by the primary battery power 509 The repeater 103 and the concentrator 101_1 to 101_n use a solar cell and a secondary battery power source 519.

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As described above, the remote metering method and system according to the present invention divides the metering area into cell units and according to the characteristics of the local environment of the dense area 110 and the remote area 120 around the concentrators 101_1 to 101_n. The WPAN and PDA metering method is selectively applied, and the interworking between the concentrators 101_1 to 101_n and the AMI operation server 210 of the AMI operation center 200 is based on the conventional mobile communication network (CDMA, GSM, WiMAX, WiBro). Unlike the use of IP networks, etc.) and M2M (Modem to Modem) method with high security.

Figure 4 is a configuration of the meter network according to the prior art, the WAN interworking method between the WPAN and the operation server according to the prior art is shown in FIG. The interworking method according to the prior art is made through the mobile network (CDMA, GSM, WiMAX, WiBro, etc.) and the IP network as shown in FIG.

1, 5A and 5B, the M2M method used in the remote meter reading system according to the present invention is the operation server 210 in the WAN modem unit 517 and the operation center 200 of the concentrator 101_1 to 101_n. Modem (221_1 ~ 221_n, # 1 ~ #n) of the modem pool system 220 connected to the) is made in the form of one-to-one modem data communication through the wireless network 300 and applied to communication applications that require security It is possible.

Hereinafter will be described in detail the network configuration and operating procedures of each component of the remote meter reading system for performing the remote meter reading method according to the present invention.

First, the outdoor command unit 105 constituting the WPAN is connected and installed adjacent to the meter 109 of each customer, and automatically sets a network address based on a unique MAC (Medium Access Control) address after power-up, and RF The channel setting through the scan and the network connection process with the higher concentrators 101_1 to 101_n are performed.

After the connection, the outdoor indicating unit 105 receives the metering alarm time from the concentrator 101_1 to 101_n through the wireless modem unit 503, sets the metering alarm time to the RTC 505, and waits for low power management. Switch to Sleep Mode. Thereafter, when a predetermined time elapses and the preset alarm time is reached, the device switches to the meter-up mode and reads the amount of usage from the meter 109 to the concentrators 101_1 to 101_n, and the concentrators 101_1 to 101_n. Upon receipt of the acknowledgment (Ack), the device returns to the sleep mode.

Next, the repeater 103 is connected to the concentrators 101_1 to 101_n at the preset network address when power is applied and the booting is completed after installation. After normally connected, data packets received from the outdoor command unit 105 and the upper and lower repeaters 103 are routed to the upper and lower repeaters 103 and the concentrators 101_1 to 101_n. Here, the setting information of the repeater 103 sets an RF channel and a network address of the corresponding cell using the PDA 107 according to the cell planning at the time of installation.

The concentrators 101_1 to 101_n set the setting information such as the cell RF channel, the network address, its own modem telephone number, the modem telephone number of the modem pool system 220, and reboot when power is applied after installation. After booting, the concentrators 101_1 to 101_n perform a meter network operation management, which is a main function, and collects data and status information from the lower repeater 103 and the outdoor command unit 105 in the data collection process.

Subsequently, the concentrators 101_1 to 101_n are connected to the operation server 210 through a modem in the concentrators 101_1 to 101_n to transmit the collected data and status information to the operation server 210. If you try to call the modem phone number of 220 and the modem is connected normally, you can send a HTTP (HyperText Transmission Protocol) _CONNECT message to access the operation server 210 in the modem-to-modem data communication mode. Send to full system 220.

As described above, in the remote meter reading method according to the present invention, first, the cell plan for analyzing the radio wave environment of the meter reading area and selecting the proper installation positions of the repeaters 103 and the concentrators 101_1 to 101_n Determine, install the device at the position of the repeater 103 and the concentrator 101_1 ~ 101_n, and install the outdoor indicator 105 in the meter 109, such as electricity, water, gas, calorimeter of each customer, In the installation process, the network information and the customer number are set in the concentrators 101_1 to 101_n, the repeater 103, and the outdoor indicator 105, and each outdoor indicator 105 is properly connected to the network (Join) and the standby mode (normally) Sleep Mode). Setting information of each device uses a setting tool of the PDA 10.

On the other hand, in the case of remote customers, the cost burden of installing one or more repeaters 103 from the concentrators 101_1 to 101_n is required to include them in the entire remote meter network. Install a separate outdoor indicator (105). The meter reading for the outdoor indicating unit 105 installed in the customer in the remote area reads the meter reading data by reading the reading data by accessing the nearby area of the customer outdoor indicating unit 105 with the reading meter PDA 107 at the reading date. No need to visit

When the modem pool system 220 establishes a Transmission Control Protocol (TCP) connection to the operation server 210 and successfully transmits a header of the HTTP request, DATA_READY is transmitted for data transmission. Data transmission is done in block units, one block is composed of several data frames, and error checking and data processing are performed by grouping several data frames for fast data transmission.

The modem pool system 220 converts the data into XML (Extensible Markup Language) according to the format through an HTTP request for each block, and transmits the data. Here, data transmission and reception is based on the data format and communication protocol defined by itself. After the transmission and reception is completed, the modem is disconnected and waits in the reception mode to receive the next data packet from the outdoor indicator and repeater.

The modem pool system 220 is connected to the operation server 210 and LAN (Ethernet), and serves as a gateway between the modem and the LAN. Accordingly, the modem pool system 220 receives the collected data from the concentrators 101_1 to 101_n through modem-to-modem communication and transmits the collected data to the operation server 210 of the upper side. At this time, communication protocol uses HTTP and data format uses XML standard.

Therefore, when a local government, water resources corporation, or other utility company wants to establish a metering network with a metering system of several metering system companies in a wide range of specific areas, applying the remote metering method according to the present invention, (Fixed Network) is built, and integrated management is possible with one operation server 210 through the motem pool system 210. For compatibility of different meter reading systems of these companies, communication protocol between WAN modem unit 517 of concentrator 101_1 to 101_n and modem 221_1 to 221_n of modem pool system 220 is defined and defined communication protocol. Of course to follow.

As described above, the remote reading method and system according to the present invention improves the problems of the reading method according to the prior art, such as direct reading, direct reading PDA reading, wireless PDA reading, fixed network reading, high data security and various reading It can provide compatibility between systems.

In addition, the remote metering method and system according to the present invention is resistant to obstacles and noise for high data reliability, metering rate, and system stability in a wireless environment, and enables ultra low-power data communication to maintain a steady state for a long time by battery operation.

In addition, the remote metering method and system according to the present invention is capable of constructing a flexible metering network at a lower cost by efficiently using a WPAN metering method and a PDA metering method and can efficiently operate the network.

In addition, the remote metering method and system according to the present invention can be centrally integrated management by increasing the compatibility between domestic and international metering business enterprises, it is possible to standardize the domestic metering method.

In addition, the remote meter reading method and system according to the present invention can select the appropriate operation method by analyzing the local characteristics and radio wave environmental characteristics of the meter reading area, so even if any one selected to build and develop the building over time Even if there is a need to change the operation method due to the change of local environment, it is possible to be flexible at any time.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

Explanation of symbols on the main parts of the drawings
100: meter reading device 101_1 ~ 101_n: concentrator
103: repeater 105: outdoor indicator
107: PDA 109: electricity
110: dense area 120: remote area
200: AMI Operation Center 210: AMI Server
211: monitor 220: modem pool system
221_1 ~ 221_n: CDMA modem 230: Billing server
300: mobile network 501, 511: MCU
503, 513: RF modem section 505, 515: RTC
507 meter interface 509 power primary battery
517: WAN modem unit 518: large capacity flash memory
519: power

Claims (20)

In the system that remotely manages the energy usage of the meter reading customer in the remote operation center,
An outdoor indicator unit that reads the energy usage from a meter indicating the energy usage of the meter reading area customer and displays the usage amount at the customer, and transmits it as a wireless data signal;
A repeater for amplifying the radio data signal received from the outdoor indicator unit to overcome the radio shadow area and extending and extending the transmission distance, and receiving the radio data signal from the outdoor indicator unit and the repeater in the meter reading area for energy usage. A short range wireless personal network device comprising a concentrator for collecting data and transmitting the collected data to the operation center;
Read the energy consumption from the outdoor indicator to perform the meter reading by PDA reading method, or read the received signal strength (RSSI) of the outdoor indicator, the repeater and the concentrator to check the transmission / reception status of the outdoor indicator, the repeater and the concentrator. A PDA used to check or remotely change settings of the outdoor indicating unit, the repeater, and the concentrator;
An operation server for collecting the energy usage from the short range wireless personal network device and storing and managing the energy usage in a database;
An operation center for charging according to the energy usage collected by the operation server; And
And a broadband wireless communication network providing wireless communication between the short range wireless personal communication network device and the operation center. delete According to claim 1, The short-range wireless personal network device,
It uses a short range wireless personal network (WPAN) that includes microwave (UHF) and power line communication (PLC), and uses one of the following modulation schemes: frequency shift keying (FSK) and Gaussian Filtered Minimum Shift Keying (GMSK). Remote meter reading system, characterized in that. The method of claim 1, wherein the operation center,
An operation server for collecting the data from the concentrator and storing and managing the data in the database;
A modem pool system providing a modem-to-modem channel between the concentrator and the operations server, and
And a billing server that receives the data from the operation server and bills according to the energy usage. The method of claim 1, wherein the PDA,
Read the energy consumption from the outdoor indicator to perform the meter reading by PDA reading method, the reception signal strength (RSSI) of the outdoor indicator, the repeater and the concentrator to read and receive status of the outdoor indicator, repeater and concentrator A function for checking a setting of the concentrator-the outdoor commander or the concentrator-the repeater for communication, a setting for the concentrator-operation server communication, a setting for changing the channel of the outdoor commander and the repeater, And a remote setting such as setting for changing the repeater network address and setting for changing the customer number and reading method of the outdoor indicating unit. delete According to claim 1, wherein the outdoor indicating unit,
In order to minimize the battery consumption of the PDA reading to read the energy consumption from the outdoor indicator using the PDA, the period of PDA reading can be set from 7 to 14 days of the month, 06 Remote reading system, characterized in that for retrieving the meter reading signal of the PDA in a period of 5 seconds from 00 to 21:00, and responds to the detected meter reading signal. delete delete delete delete delete In the method of reading the energy usage of the meter reading area in the remote operation server,
Transmitting, by a concentrator, the energy consumption of the meter indicating the energy usage to a modem of a modem pool system connected to the operation server through a modem; And
The modem pool system transmits usage of the meter received to the operation server.
Remote metering method consisting of a number of steps. The method of claim 13,
A PDA which reads the energy consumption by reading the energy consumption from a meter indicating an energy consumption of a customer classified as an outlying area of the metering area and transmitting the energy usage as a wireless data signal, and reading the energy usage by the outdoor indicating unit; And transmitting the file storing the energy usage stored in the PDA to the operation server in a format promised between the PDA and the operation server. The method of claim 13,
In the process of establishing a local area wireless personal network (WPAN), the outdoor indicator is connected to and installed adjacent to the meter of the meter reading area, and automatically sets a network address based on a unique MAC (Medium Access Control) address after powering on. Establishing a channel through the RF scan to connect the network with a higher repeater and the concentrator; and when the repeater is powered on after installation, booting is completed, and the network is connected to the concentrator at a preset network address. And setting setting information such as a cell RF channel, a network address, a modem telephone number of the modem, a modem telephone number of the modem pool system, and performing reboot when power is applied after installation of the concentrator. Remote meter reading method characterized by. The method of claim 15, wherein the outdoor indicating unit,
After the network connection, after receiving the metering alarm time from the concentrator through the wireless modem unit, set the metering alarm time in the RTC (Real Time Clock), after switching to the sleep mode (Sleep Mode) for low power management, When the preset alarm time is reached, the meter switches to Wake-up Mode, reads the amount of usage from the meter and sends it to the concentrator. When receiving the acknowledgment (Ack) from the concentrator, it switches back to Sleep Mode Remote meter reading method characterized in that. The method of claim 15, wherein the repeater,
And after the network connection, route data packets received from the outdoor indicator and the upper and lower repeaters to the upper and lower repeaters and the concentrator. The method of claim 17, wherein the repeater,
Remote metering method characterized by setting the RF channel and the network address of the cell using the PDA according to the cell planning at the time of installation. The method of claim 15, wherein the concentrator,
Collect the data and status information from the lower repeater and the outdoor indicator for the meter network operation management after the reboot,
In order to transmit the collected data and status information to the operation server, attempt to call the modem telephone number of the modem pool system connected to the operation server through a modem, and modem-to-modem data if the modem connection is established normally And a HyperText Transmission Protocol (HTTP) _CONNECT message to the modem pool system to connect to the management server in order to access the management server in a communication mode. 20. The system of claim 19, wherein the modem pool system is
Remote communication method using the HTTP communication protocol, the data format uses the Extensible Markup Language (XML) standard.

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