KR101437084B1 - Standard time correction system of homegateway and homeserver and method thereof - Google Patents

Abstract

A system for correcting the standard time of a home gateway and a home server, the system comprising: biometric information collection means for collecting biometric information; means for collecting data collected by the biometric information collection means A home gateway for linking the biometric information collection means and the home server, an external server connected to the home gateway through the Internet and receiving data stored in the home server, and a home server connected to the home gateway via the Internet Wherein the home gateway is unconditionally reset to a standard time downloaded by the Simple Network Time Protocol (SNTP) of the Internet when booting or rebooting the home gateway, And an estimation offset is calculated.

By using the standard time correction system and method of the home gateway and the home server as described above, even when the time of the system of the home server or the home gateway is inaccurate, it can be reset to the corrected standard time accurately, The transmission error can be solved.

Home gateway, home server, standard time, living body

Description

[0001] The present invention relates generally to home gateway and home server, and more particularly,

1 is a block diagram of a prior art standard time setting system,

FIG. 2 is a block diagram illustrating a system for correcting the standard time of a home gateway and a home server according to the present invention.

3 is a flow chart for explaining the correction system shown in Fig.

Description of the Related Art [0002]

10: Biometric information collecting means 20: Home gateway

30: home server 40: external server

50: External Time Server

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system and method for correcting standard time of a home gateway and a home server, and more particularly, to a system and method for correcting a standard time of a home gateway and a home server.

BACKGROUND OF THE INVENTION [0002] In recent years, the Internet has been widely used, and computers interconnected by a plurality of computers and computer networks can exchange information using various services such as e-mail, Gopher, FTP, and the World Wide Web (WWW) The WWW service is a server computer system (i.e., a web server) that transmits web page information written in HTML to a remote client system. Each resource (ie, computer or web page) on the web is assigned a unique uniform resource locator (URL). To view a specific web page, the client system specifies the URL of the web page and transmits it according to the HTTP protocol Upon request, the server system transmits the corresponding web page information correspondingly. When the client system receives the web page, the client system displays the web page on the monitor through the browser.

In the case of various electronic apparatuses including a computer, the time management method is largely divided into a method of manually setting the timer and the current time by a user who turns on the main power, a method of storing time data on the memory, And the way in which the time is operated without. In the former case, it is difficult to accurately set the time due to the unknown time of the reference, the error due to the user's eyesight, and the delay due to the operation time. In the latter case, the time can not be expressed accurately due to various factors such as the inaccuracy of the initial time There is a problem. In particular, since the internal clock that advances the time is not accurate, errors ranging from a few seconds to a few minutes may occur every day.

In spite of this error in time, the time information in general electronic devices has not been a big problem since it is mainly used in areas that do not use comparative precision such as video reservation recording, alarm, automatic on / off.

However, according to the development of the Internet, commercial transactions using the Internet are actively performed, and various scientific technologies require more accurate time, and it is necessary to improve the conventional inaccurate time. That is, in the case of financial services in electronic commerce, cyber securities trading (HTS: home trading system) using the Internet is activated, and financial loss may occur depending on the time of the transaction, In some cases. In recent years, the brokerage firm has been informed that it is liable to the brokerage firm for the loss of customers due to the failure of brokerage system due to the order system failure of brokerage firms. In order to receive the compensation, Do. However, in the present transaction system, the order time and the order log are not left on the customer side, and even if it is left, the time accuracy can not be guaranteed, and the customer may suffer damage.

In other words, if the Internet is well and suddenly unplanned, the standard time can not be guaranteed, and when it is linked to a wired or wireless health care service system (hereinafter referred to as "u-Health") for example, its importance, Whether it has been transmitted is important in health care services.

An example of such a technique is disclosed in Korean Patent Laid-Open Publication No. 2002-0007860 (published on Jan. 29, 2002).

1, the system includes a user computer 102, a time information providing site 120, and a stock site 130 connected to the Internet, and the user computer 102 is connected to the Internet A web browser and electronic commerce software for accessing the time information providing site 110 are installed. When the time information is downloaded to the time information providing site 120 through the Internet 110, the time is corrected through an internal setting procedure . In the computer system, the time information may be set in a CMOS RAM or an EEPROM, and the time information providing site 120 may include a standard time generating device 124 and a time server 122, And the securities site 130 provides a cyber securities trading service (home trading service) using the time provided by the time information providing site 120 or its own standard time.

The standard time generation device 124 of the time information provision site generates a standard time using GPS or the like and the time server 122 receives the correct standard time from the standard time generation device 124 and provides it to the users on the Internet do. The time information of the securities site 130 may be an internal clock of a securities company computer system or may be used by receiving time information from the time information providing site 120 according to the present invention.

However, in the above-described technology, when the Internet is available, the time is regularly downloaded every time a given interval passes. Therefore, when the interval is moderately short, the problem may be small. However, if synchronization is performed frequently, There is a problem that the time synchronization can not be guaranteed if the internet is disconnected and a certain time passes.

That is, the conventional time correction technique simply calculates the offset in the program and adds or subtracts the offset.

In other words, it is possible that the time of the system does not match with the standard time after the power failure, and it is necessary to calibrate if the time is slow or fast when regularly downloading the standard time from the Internet. In particular, when measuring e-commerce transactions in a home network or biosensors for u-Health, it is necessary to transfer data after synchronizing to the correct time. Since the measured data can not be ignored at the local time when the internet is not in time, it stores the local time and data at that time on the home server, and then remembers the difference between the downloaded time and the standard time There is a problem in that a mechanism for transmitting data that has been measured and stored again in the standard time is required in the home server.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a system and method for correcting standard time of a home gateway and a home server which can accurately correct the standard time.

Another object of the present invention is to provide a system and method for correcting the standard time of a home gateway and a home server, which can not easily manipulate the time and provide an accurate time stamp for billing or future conflicts.

In order to achieve the above object, a system for correcting the standard time of a home gateway and a home server according to the present invention is a system for correcting the standard time of a home gateway and a home server, the system comprising: a biometric information collecting means for collecting biometric information; A home gateway for interlocking the biometric information collection means with the home server, an external server connected to the home gateway via the Internet and receiving data stored in the home server, And an external standard time server connected to the home gateway and transmitting the standard time to the home gateway, wherein the home gateway is unconditionally reset to the standard time downloaded by the SNTP (Simple Network Time Protocol) of the Internet at boot or reboot, Is characterized by calculating an estimated offset of the resetted standard time .

Further, in the standard time correction system according to the present invention, the home server may ignore the estimated offset if the absolute value of the estimated offset is less than 1 second, and transmit the data to the external server.

Further, in the standard time correction system according to the present invention, when the absolute value of the estimated offset is greater than 1 second, the home server obtains the estimated correction value, takes a predicted measurement time with a time stamp, and transmits the data to the external server .

According to another aspect of the present invention, there is provided a method of calibrating a reference time according to the present invention, comprising: biometric information collection means for collecting biometric information; a home server for storing data collected by the biometric information collection means; An external server connected to the home gateway via the Internet and receiving data stored in the home server, and an external standard server connected to the home gateway through the Internet and transmitting the home gateway local time to the home gateway, The method comprising the steps of: unconditionally resetting a time when the home gateway is booted or rebooted, the time being downloaded in the Simple Network Time Protocol (SNTP) of the Internet; transmitting the standard time to the home server; Computing an estimated offset of a given time instant, Operation of the positive offset is characterized by estimating an offset by a linear interpolation.

In the standard time correction method according to the present invention, when the absolute value of the estimated offset is less than 1 second, the home server ignores the estimated offset and transmits the data to the external server.

Further, in the standard time correction method according to the present invention, when the absolute value of the estimated offset is greater than 1 second, the home server obtains the estimated correction value and transmits the data to the external server by taking a predicted measurement time with a time stamp .

In addition, in the standard time correction method according to the present invention, the calculation of the estimation offset estimates the consistency of the system with a 3-mean average offset, and the home server notifies the alarm when the estimation is out of consistency.

In addition, in the standard time correction method according to the present invention, when the Internet is unavailable for more than one day, the cell phone time of the base station is downloaded from the WAP server to correct the standard time.

If the absolute value of the estimated offset is greater than one second, the home server calculates a predicted cumulative value, which is to be generated during a day from a previous measurement or a time when the standard time is downloaded to obtain an estimated correction value, And a value obtained by dividing the offset value is added to correct the predicted measurement time.

These and other objects and novel features of the present invention will become more apparent from the description of the present specification and the accompanying drawings.

First, the concept of the present invention will be described.

In case of intermittent biosensor transmission such as blood glucose or blood pressure, even if the Internet is accidentally disconnected, data that has already been successfully measured is stored in the home server. If the internet is later restored, the data is again transmitted to the outside, , And the time should be close to the correct side.

Therefore, the standard time is downloaded about once a day, and it compensates by estimating the offset, and it thinks that the time will not be wrong in a normal state, and a method to make a time not to be wrong even when there is the internet trouble is prepared.

In the system according to the present invention, first of all, when a power failure occurs, the system reboots and the time is automatically synchronized. Otherwise, if the Internet is interrupted for a while or for a considerable period of time, there is no guarantee that the system time is a difference of less than one second from the standard time. When the internet is back, it does not download the standard time but calculates the time difference. If it is within 1 second, it compensates only when the difference is more than 1 second. It is not a simple offset from the time when the data is already measured And then linearly interpolates and corrects the estimated offset.

If a system is downloaded one time a day and the system is incorrect by 8 seconds a day, estimate the time by assigning a corresponding estimated offset. In the normal case where no power failure occurs, the average value of the offsets of the last three days is calculated (during the first three days of rebooting), and an alarm is notified when an offset that deviates from the average is detected.

And once a day, when the Internet is unstable, the WAP server downloads the base station time and corrects the time. When the alarm occurs, download the standard time again and compare it with the offset.

Hereinafter, the configuration of the present invention will be described with reference to Fig. 2 and Fig.

FIG. 2 is a block diagram illustrating a standard time correction system of a home gateway and a home server according to the present invention, and FIG. 3 is a flowchart illustrating a correction system shown in FIG. 2. Referring to FIG.

2, the biometric information collecting means 10 is connected to the home gateway 20, and the home gateway 20 is connected to the home server 30.

Further, the home gateway 20 is connected to an external server 40 provided in the healthcare medical service system via the Internet and an external standard time server 50 notifying the standard time.

As the biometric information collecting means 10, for example, a portable remote health state data measuring device combining a hand held health state data measuring device disclosed in Japanese Patent Application Laid-Open No. 2003-150718 and a general commercial mobile phone, Japanese Patent Application Laid-Open No. 2003-125097 A health information collecting device for a mobile phone for collecting health information by using the mobile phone device disclosed in Japanese Patent Application Laid-Open No. 2002-261955, a device for measuring a pulse, a blood pressure, and a body temperature in an accessory such as a wristwatch or a necklace In addition to the sensor, an originating circuit that emits a radio signal when an urgent situation is desired is provided. When it is determined that the health state is deteriorated by the microcomputer in the jewelry, a radio signal is transmitted by the originating circuit, A system capable of notifying an emergency in a predetermined place such as a place, a system disclosed in Japanese Patent Application Laid-Open No. 2003-10916 A system for transferring sensor data from a sensor to a portable terminal from time to time by attaching a biosensor for detecting a seizure of heart disease disclosed in No. 0 to a body, a single generation system disclosed in Japanese Patent Laid-Open Publication No. 2003-141667, , Particularly health of residents in elderly households, by the use of water, gas, and other sensors, and health of the residents who notify the water and gas meter and security center and the people concerned, do.

The home gateway 20 is a device for connecting the bio-information collecting means 10 and the home server 30 to the Internet. The home gateway 20 includes a PDA, a web pad, an IPTV set-top box, and an IP cam as a LAN (Local Area Network) It is a device that links home network and Internet. In the home server 30, information data acquired by the biometric information collection means 100 is stored.

The external standard time server 50 is a server provided in a standard laboratory or a national information system (NIST), and transmits the standard time to the home gateway 20 through the Internet.

The operation of the system shown in Fig. 2 will be described with reference to Fig.

First, the home gateway 20 is unconditionally reset to the standard time downloaded by the SNTP (Simple Network Time Protocol) of the Internet at boot or reboot (S10). That is, the external standard time server 50 transmits the standard time to the home gateway 20, the home gateway 20 matches the standard time transmitted from the external standard time server 50, and transmits the standard time to the home server 30 (S20).

The home server 30 calculates an estimation offset according to the received standard time (S30). If the absolute value of the estimated offset calculated in step S30 is smaller than 1 second (S40), the measurement data stored in the home server 30 is ignored and transmitted to the external server 40 via the home gateway 20 (S50).
At this time, the estimated offset of the home server is calculated as a difference from the previously downloaded standard time in the received standard time. That is, the home server resets its own (home server) standard time (home server standard time, home server local time) at a standard time received by the home gateway, estimates the difference between the reset home server standard time and the home server standard time before reset Calculate the offset.

If the absolute value of the estimated offset is greater than 1 (sec) in step S40, the value obtained by dividing the predicted cumulative offset value that will be generated during the day from the previous measurement time or the time when the standard time is downloaded to obtain the estimated correction value is added, Is stamped with a time stamp (S60) and transmitted to the external server 40 together with the data stored in the home server 30.

If a time period during which the power failure has not occurred but the Internet has not been on for at least one day occurs, before the home gateway 20 is unconditionally reset to the standard time, as described above, when the cumulative estimated offset is reflected, 30, and transmits the data to the external server 40 by time-stamping the measured data at that time. When it is more than one second, the data is transmitted by performing the estimation correction and when the transmission is completed, the home gateway 20 is reset to the standard time.

If there is no power outage but the internet is unavailable for more than one day and the average accumulated offset of 3 times a day can not be obtained, or if the offset is too large, correct the time with the base station time of the mobile phone through something like WAP server.

For example, assuming that the home gateway 20 has a system that is downloaded at 12:00 on January 1, 2007, and has a time difference of 8 seconds compared to the standard time downloaded at 12:00 on January 2, do.

Since the cumulative offset for one day is 8 seconds, it is estimated that 2 seconds is slower than the standard time when measured at 18:00 on January 2, so the data is calculated by subtracting 2 seconds corresponding to the offset.

If the internet time is unavailable due to the Internet failure, the cumulative offset corresponding to 8 seconds + 2 seconds is estimated to have occurred. If the standard time is not downloaded at 12:00 on January 2, an offset corresponding to 2 seconds .

You can obtain the average cumulative offset per day by downloading the standard time at 12:00 on January 4th, which can be averaged with the latest three matches. The offset is estimated based on the measured time and the most recently downloaded time of the standard time, and the time for which the correction is made is stamped with a time stamp.

That is, the present invention estimates the time measured by calculating the offset rather than unconditionally downloading and correcting the standard time, and if it is within 1 second, the offset is used as a parameter when it exceeds 1 second will be.

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

As described above, according to the system and method for correcting the standard time of the home gateway and the home server according to the present invention, even when the time of the system of the home server or the home gateway is inaccurate, It is possible to solve the error of the data transmission due to the disconnection.

Claims (9)

A system for calibrating the time of a home gateway and a home server, Biometric information collection means for collecting biometric information, A home server for storing data collected by the biometric information collecting means, the home server storing data including a measurement time measured by a standard time of the home server (hereinafter, referred to as home server standard time) A home gateway for linking the biometric information collection means and the home server, An external server connected to the home gateway via the Internet and receiving data stored in the home server; And an external standard time server connected to the home gateway via the Internet and transmitting the standard time to the home gateway, Wherein the home gateway receives the standard time from the external time server and resets the standard time, transmits the reset standard time to the home server, Wherein the home server resets the home server standard time at the reset time, calculates an offset of the home server standard time, and calculates a difference between the reset home server standard time and the home server standard time before the reset, Correction system. The method according to claim 1, Wherein the home server ignores the estimated offset if the absolute value of the estimated offset is less than one second and transmits the data to the external server. The method according to claim 1, The home server may transmit the data to the external server by taking an estimated measurement time obtained by calculating the estimated correction value with the estimated offset and stamping the measured time with a time stamp if the absolute value of the estimated offset is greater than one second Features a standard time calibration system. A home server for storing data collected by the biometric information collecting means, comprising: a home information storing unit that stores data including a measurement time measured by a standard time of the home server A home gateway connected to the home gateway via the Internet and connected to the home gateway via the Internet and an external server receiving data stored in the home server, A method of calibrating a system time of day, including an external standard time server, Resetting the time when the home gateway receives the standard time from the external time server, Transmitting a resetted standard time to the home server, Wherein the home server resets the home server standard time at the reset time and calculates an estimated offset of the home server standard time and calculates a difference between the reset home server standard time and the home server standard time before reset A method of calibrating a reference time. 5. The method of claim 4, Wherein the home server ignores the estimated offset if the absolute value of the estimated offset is less than one second and transmits the data to the external server. 5. The method of claim 4, The home server may transmit the data to the external server by taking an estimated measurement time obtained by calculating the estimated correction value with the estimated offset and stamping the measured time with a time stamp if the absolute value of the estimated offset is greater than one second A method of calibrating a reference time. The method according to claim 6, Wherein the operation of the estimation offset estimates the consistency of the system with a 3-mean average offset, and the home server notifies the alarm when the estimate is out of consistency. The method according to claim 6, And downloading the cell phone time of the base station from the WAP server to correct the standard time when the Internet becomes unavailable for more than one day. The method according to claim 6, If the absolute value of the estimated offset is greater than one second, the home server calculates an interval of measurement time of the data, linearly interpolates the estimated value, corrects the estimated value, Is obtained.

Images