JP2003240882A - Time correction device and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a time correction and device capable of reducing the maximum time error of a real time clock device and a system clock device. <P>SOLUTION: A correction timing control means 105 starts a time correction means 104 every certain time Dw that is a multiple number of an updating interval Dr of the real time clock device 102. The correction means 104 reads a time Tr from the clock device 102 and reads a time Ts from the system clock device 103 when it is started by the control means 105. Then, the time correction means calculates a time Tr' by adding 1/2 of the updating interval Dr to the time Tr, and sets the time Tr' in the clock device 103 when the difference between the time Tr' and the time Ts is larger than a threshold value Dt. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time correction device and method in a system for time management by a real time clock device and a system clock device.

[0002]

2. Description of the Related Art Conventionally, a system having a base station device includes a system clock device that generates a clock signal for clocking inside the system and a real-time clock device (RTC) that generates a clock signal for management. However, it is known that the time is managed based on the measured times of the system clock device and the real-time clock device.

The real-time clock device can manage time with high accuracy over a long period of time as compared with a system clock device realized by software, but requires time to access for time acquisition. Further, in the real-time clock device, the update interval of time may be significantly larger than the update interval required by the system. Therefore, the update interval required in the system is basically realized by the system clock device, and the real time clock device is used to maintain the accuracy over a long period of time. The correction of the error between the real-time clock device and the system clock device is performed by periodically setting the value of the real-time clock device in the system clock device.

As a method of correcting the time difference between the real-time clock device and the system clock device, for example,
A method of periodically reading the time of the real-time clock device and setting it directly in the system clock device, and UNIX
As a method used in (R) or the like, there is a method of calculating an error between the real-time clock device and the system clock device and shifting the time of the system clock device back and forth at regular intervals to make a small correction.

The accuracy of the real-time clock device is higher than that of the system clock device, but is lower than the accuracy required by the system continuously. It is necessary to correct the time.

As a method for correcting the time of the real-time clock device itself, as shown in Japanese Unexamined Patent Publication No. 2000-19275, the unit time defined by the oscillation frequency of the oscillator is integrated to correspond to the current time. A method for creating necessary time data while correcting the measurement time while holding the measurement time and providing correction data for correcting the measurement time, wherein the above-mentioned correction data is There is one that is an increase / decrease time with respect to the unit time defined by the above-mentioned oscillation frequency.

[0007]

However, the conventional method of directly setting the value of the real-time clock device directly to the system clock device has a problem that the system time periodically changes. Further, there is a problem that the system time changes significantly when the time update interval of the real-time clock device is long. Further, the method used in UNIX (R) has a problem that the processing becomes complicated.

Further, in a device (for example, a base station device) that needs to operate in synchronization with the maintenance device, it is more accurate to receive a newer time from the maintenance device and set the time. It is not necessary to autonomously correct the real-time clock device itself as in the method described in Japanese Patent Publication, but a device and method for reflecting a new time in the real-time clock device and the system clock device are required.

The present invention has been made in view of the above points, and an object of the present invention is to provide a time correction device and method capable of reducing the maximum error between the times of the real-time clock device and the system clock device.

[0010]

The time correction device of the present invention is activated by a system clock device for generating a clock signal for clocking, a real-time clock device for generating a management clock signal at an update interval Dr. Sometimes the time Tr is read from the real time clock device, the time Ts is read from the system clock device, and then the time T
A time correction means for obtaining the time Tr 'by adding 1/2 of the update interval Dr to r, and then setting the time Tr' in the system clock device when the difference between the time Tr 'and the time Ts is larger than the threshold value Dt. And a correction timing control unit that activates the time correction unit every fixed time Dw that is a multiple of the update interval Dr.

With this configuration, it is possible to reduce the maximum time difference between the real-time clock device and the system clock device.

The time correction device of the present invention comprises a system clock device for generating a clock signal for clocking and an update interval D.
a real-time clock device that generates a management clock signal at r, and a time Tr that is read from the real-time clock device when activated and a time Ts from the system clock device, and then a constant A, B greater than 0.
The time Tu to be corrected from the values of the time Tr and the time Ts is obtained by the formula Tu = (ATr + BTs) / (A + B), and the time correction means for setting the time Tu in the system clock device and the update interval Dr Fixed time Dw that is a multiple
And a correction timing control means for activating the time correction means for each time.

With this configuration, it is possible to reduce the maximum time difference between the real-time clock device and the system clock device, and it is possible to set the amount of time change of the system at the time of time correction according to the system. It is possible to suppress a sudden time change.

The time correction device of the present invention comprises a system clock device for generating a clock signal for clocking and an update interval D.
A real-time clock device that generates a management clock signal at r, and a time Tr that is read from the real-time clock device when activated and a time Ts from the system clock device. Next, at time Tr, 1/2 of the update interval Dr is set. The added time Tr 'is obtained, and when the difference between the time Tr' and the time Ts is larger than the threshold value Dt, the time to be corrected from the constants A and B larger than 0 and the values of the time Tr 'and the time Ts. Tu = Tu = (ATr '+ BTs) / (A
+ B), and then a time correction means for setting the time Tu in the system clock device, and a correction timing control means for activating the time correction means at fixed time intervals Dw that are multiples of the update interval Dr. Take the composition.

With this configuration, the maximum error between the time of the real-time clock device and the time of the system clock device can be reduced, and the amount of time change of the system at the time of time correction can be set according to the system. It is possible to suppress a sudden time change.

The time correction device of the present invention comprises a time setting means for receiving a notification of the set time from the maintenance device, a system clock device and a real time clock setting means connected to the time setting device, a system clock device and a real time clock. System clock setting means connected to the setting means and the correction timing control means, and the time setting means notifies the real time clock setting means of the set time Tn when receiving the notification of the set time Tn from the maintenance device. Then, the real time clock setting means sets the set time Tn to the update interval Dr of the real time clock device.
If the value of the finer time is 0, the set time Tn
To the real time clock device and notify the system clock setting means, which then sets the set time Tn in the system clock device,
Next, the system clock setting means adopts a configuration in which the standby time of the correction timing control means is returned to 0 after waiting for half the update interval Dr of the real time clock device.

According to this configuration, the maximum error between the time of the real time clock device and the time of the system clock device can be reduced, and the value of the time finer than the update interval of the real time clock device is less after the time is set. The error does not satisfy the correction condition.

The time correction device of the present invention includes a time setting means for receiving a notification of the set time Tn from the maintenance device, a system clock device and a real-time clock setting means connected to the time setting means, the system clock device and the real-time device. A system clock setting means connected to the clock setting means and the correction timing control means is provided, and the time setting means sets the set time Tn to the real time clock setting means when receiving the notification of the set time Tn from the maintenance device. Then, the real time clock setting means sets the time Tn to the update interval D of the real time clock device.
If the value of time finer than r is not 0, the set time T
The next update time Tn 'of the real-time clock device after n is obtained, and the real-time clock setting means sets the time Tn' to the real-time clock device after waiting for a time of Tn'-Tn and the system clock setting means. Then, the system clock setting means sets the time Tn 'in the system clock device, and then the system clock setting means waits for half the update interval Dr of the real time clock device and then the correction timing control means. A configuration is adopted in which the waiting time is returned to 0.

With this configuration, the maximum error between the time of the real-time clock device and the time of the system clock device can be reduced, and correction is performed with a small error after setting the time when the time value finer than the update interval of the real-time clock device is not zero. The condition of is not satisfied.

The time correction device of the present invention comprises a time setting means for receiving a notification of the set time from the maintenance device, a real time clock setting means connected to the system clock device and the time setting means, a real time clock setting means and a correction. Standby time setting means connected to the timing control means, and when the time setting means receives the notification of the set time Tn from the maintenance device, the set time Tn is smaller than the update interval Dr of the real-time clock device. When the time value is 0, the set time Tn is notified to the real-time clock setting means, and then the real-time clock setting means sets the time Tn to the real-time clock device and also notifies the waiting time setting means, and then waits. The time setting means is 1 / the update interval Dr of the real time clock device.
A configuration is adopted in which the standby time of the correction timing control means is set to a certain fixed time Dw after waiting for 2 hours.

With this configuration, it is possible to reduce the maximum error between the time of the real-time clock device and the time of the system clock device, and the value of time finer than the update interval of the real-time clock device is less after the time is set. The error does not satisfy the correction condition.

The time correction device of the present invention includes a time setting means for receiving a notification of the set time from the maintenance device, a real time clock setting means connected to the system clock device and the time setting means, a real time clock setting means and a correction. Standby time setting means connected to the timing control means, and when the time setting means receives the notification of the set time Tn from the maintenance device, the set time Tn is smaller than the update interval Dr of the real-time clock device. When the time value is not 0, the set time Tn is notified to the real-time clock setting means, and the real-time clock setting means then obtains the next update time Tn ′ of the real-time clock device after the set time Tn. The real time clock setting means waits for the time Tn'-Tn and then resets the time Tn '. Le notify the waiting time setting means and sets the time clock unit, then the standby time setting unit update interval Dr of the real-time clock device 1 /
A configuration is adopted in which the standby time of the correction timing control means is set to a certain fixed time Dw after waiting for 2 hours.

With this configuration, it is possible to reduce the maximum error between the time of the real time clock device and the time of the system clock device, and to reduce the error after setting the time when the time value finer than the update interval of the real time clock device is not zero. Then, the correction condition is not satisfied.

The time correction method of the present invention comprises a system clock device for generating a clock signal for clocking and an update interval D.
A time provided with a real-time clock device for generating a management clock signal at r, a time correction means connected to the system clock device and the real-time clock device, and a correction timing control means connected to the time correction means. In the correction device, a step in which the correction timing control means activates the time correction means every fixed time Dw that is a multiple of the update interval Dr of the real time clock device, and the real time clock device when the time correction means is activated by the correction timing control means. From the system clock device at the same time as reading the time Tr from
And a step of obtaining a time Tr ′ by adding
setting the time Tr 'in the system clock device when the difference between r'and the time Ts is larger than the threshold value Dt.

According to this method, it is possible to reduce the maximum time difference between the real time clock device and the system clock device.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION The essence of the present invention is that the correction timing control means activates the time correction means every fixed time Dw that is a multiple of the update interval Dr of the system clock device, and the time correction means causes the correction timing to be corrected. The time Tr from the real-time clock device when activated by the control means.
And the time T from the system clock device.
s is read, and then time Tr ′ is calculated by adding 1/2 of the update interval Dr to time Tr, and then time Tr ′ and time Ts
The time Tr ′ is set in the system clock device when the difference between the two is larger than the threshold value Dt.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram showing a configuration of a time correction device according to Embodiment 1 of the present invention.

Time correction apparatus 101 according to Embodiment 1 of the present invention is installed in base station apparatus 100. The time correction device 101 corrects the time in a system that manages the time based on the measurement times of the real-time clock device 102 and the system clock device 103. The real-time clock device 102 generates a clock signal for management. The system clock device 103 is
A clock signal for clocking is generated inside the system.

The time correction device 101 includes a time correction means 104 connected to the real time clock device 102 and the system clock device 103, and the time correction means 1
And the correction timing control means 105 connected to 04.

The correction timing control means 105 activates the time correction means 104 at every fixed time Dw which is a multiple of the update interval Dr of the real-time clock device 102. The time correction means 104, when activated by the correction timing control means 105, causes the real time clock device 102 to operate.
From the system clock device 1
The time Ts is read from 03, and then at time Tr, 1 of Dr
The time Tr 'is calculated by adding / 2, and then the time Tr' is set in the system clock device 103 when the difference between the time Tr 'and the time Ts is larger than the threshold value.

Next, the time correction device 1 having the above configuration
The operation of 01 will be specifically described with reference to FIG. 2 together with FIG. FIG. 2 is a flowchart for explaining the operation of time correction device 101 according to the first embodiment of the present invention.

Here, the update interval of the system clock device 103 is Ds. As an example, Dr is set to 1 second and Ds is set to 10 milliseconds. The real-time clock device 102 and the system clock device 103 update the time according to their respective update intervals Dr and Ds. That is, the real-time clock device 102 updates the time in units of 1 second, and the system clock device 103 updates the time in units of 10 milliseconds.

A slight error occurs when updating the time of the real-time clock device 102 and the system clock device 103.
Since the error is much smaller than that of the system clock device 103, it is necessary to correct the system clock device 103 based on the time of the real-time clock device 102. The correction timing control unit 105 activates the time correction unit 104 at each correction interval Dw that is a multiple of the update interval Dr. For example, Dw is 10 seconds 00. The time correction means 104 performs the time correction process using the threshold value Dt when activated.

As shown in FIG. 2, the time correction means 104
Reads the time Tr from the real-time clock device 102 (step ST201), and then reads the time Ts from the system clock device 103 (step ST20).
2). The real-time clock device 102 is shown here.
The order of reading the time from the system clock device 103 may be the reverse of the above. For example, Tr is 0: 12: 2
It is 3 seconds and Ts is 0: 12: 24: 32. However, since the real-time clock device 102 is updated at the update interval Dr, 0:12:23 is 0 internally.
The value is from 0 to 99.

Next, the time correction means 104 sets Tr ', which is obtained by adding 1/2 of the update interval Dr to the time Tr, to Tr' = Tr.
Calculate by the formula of + (1/2) Dr (step ST2
03). For example, since Dr is 1 second, Tr 'is 0:12.
The time is 23.50 minutes.

Next, the time correction means 104 causes the time Tr '
And the time Ts are greater than a threshold value Dt (step ST204). Step ST204
When the difference between the time Tr 'and the time Ts is larger than the threshold value Dt, the time is corrected. Step ST204
When the difference between the time Tr ′ and the time Ts is smaller than the threshold value Dt, the process ends without performing the time correction. For example, if the threshold value Dt is 0 seconds 50, the difference between Tr ′ and Ts is 0 seconds 82, which is larger than the threshold value Dt, so the time is corrected.

Next, using the value of time Tr 'as the correction time,
Set in the system clock device 103 (step ST
205). After this setting, the system clock device 103
Is 0: 12: 23: 50. The internal time of the real-time clock device 102 is 0: 12: 23: 00.
Since it is 99, the maximum error with the system clock device 103 is 0 seconds 50.

As described above, according to the present embodiment, when the time correction means 104 is activated by the correction timing control means 105, the time Tr is read from the real time clock device 102 and the system clock device 10 is read.
The time Ts is read from 3 and then at time Tr, 1 / Dr of Dr
2 is added to obtain the time Tr ′, and when the difference between the time Tr ′ and the time Ts is larger than the threshold value Dt, the time Tr ′ is set in the system clock device 103. Therefore, the real time clock device 102 and the system clock device 102 are set. 103
The maximum error of time can be reduced.

(Second Embodiment) Next, a time correction device according to a second embodiment of the present invention will be described with reference to FIG. 3 together with FIG. In the second embodiment of the present invention, the same components as those in the first embodiment of the present invention are designated by the same reference numerals.

As shown in FIG. 1, a second embodiment of the present invention.
The time correction apparatus 101 according to the above is installed in the base station apparatus 100. The time correction device 101 corrects the time in a system that manages the time based on the measurement times of the real-time clock device 102 and the system clock device 103. Real time clock device 102
Generates a clock signal for management. The system clock device 103 generates a clock signal for clocking inside the system.

The time correction device 101 includes a time correction means 104 connected to the system clock device 103 and the real time clock device 102, and the time correction means 1
And the correction timing control means 105 connected to 04.

The correction timing control means 105 activates the time correction means 104 at every fixed time Dw which is a multiple of the update interval Dr of the real-time clock device 102. The time correction means 104, when activated by the correction timing control means 105, causes the real time clock device 102 to operate.
The time Tr is read from the system clock device 1
When the time Ts is read from 03 and the constants A and B are set to arbitrary values larger than 0, the time Tu to be corrected from the values of the time Tr and the time Ts is Tu = (ATr + BTs) /
It is calculated by the equation (A + B), and then the time Tu is set in the system clock device 103. Here, the values of the constants A and B are determined according to the characteristics of the system.

Next, the time correction device 1 having the above configuration
The operation of 01 will be specifically described with reference to FIG. 3 together with FIG. FIG. 3 is a flow chart for explaining the operation of the time correction device 101 according to the second embodiment of the present invention.

As shown in FIG. 3, the time correction means 104
Is read by the correction timing control means 105, the time Tr is read from the real-time clock device 102 (step ST301), and the time Ts is read from the system clock device 103 (step ST30).
2). For example, it is assumed that Tr is 0:12:23 and Ts is 0: 12: 24: 32.

Next, the time correction means 104 obtains the time Tu to be corrected from the values of the time Tr and the time Ts (step ST303). The time Tu to be corrected is Tu = (AT
r + BTs) / (A + B). Here, the constants A and B are predetermined values larger than 0 and are determined according to the characteristics of the system. For example, if A = B = 1, Tu = (Tr + Ts) /2=0:12:23.66 is the time Tu to be corrected. Next, the time correction means 104 sets the value of Tu as the time to be corrected in the system clock device 103 (step ST30).
4).

As described above, according to the present embodiment, when the time correction means 104 sets the constants A and B to predetermined values larger than 0, the time Tu to be corrected from the values of the time Tr and the time Ts. Is calculated by the equation Tu = (ATr + BTs) / (A + B), and then the time Tu is calculated by the system clock device 10.
Since it is set to 3, the maximum time difference between the real-time clock device 102 and the system clock device 103 can be reduced, and the amount of time change of the system at the time of time correction can be set according to the system. It is possible to suppress a sudden time change.

(Third Embodiment) Next, a time correction device according to a third embodiment of the present invention will be described with reference to FIG. 4 together with FIG. In the third embodiment of the present invention, the same components as those of the first embodiment of the present invention are designated by the same reference numerals.

As shown in FIG. 1, the third embodiment of the present invention.
The time correction apparatus 101 according to the above is installed in the base station apparatus 100. The time correction device 101 corrects the time in a system that manages the time based on the measurement times of the real-time clock device 102 and the system clock device 103. Real time clock device 102
Generates a clock signal for management. The system clock device 103 generates a clock signal for clocking inside the system.

The time correction device 101 includes a time correction means 104 connected to the system clock device 103 and the real time clock device 102, and the time correction means 1.
And the correction timing control means 105 connected to 04.

The correction timing control means 105 activates the time correction means 104 at every fixed time Dw which is a multiple of the update interval Dr of the real-time clock device 102. The time correction means 104, when activated by the correction timing control means 105, causes the real time clock device 102 to operate.
The time Tr is read from the system clock device 1
The time Ts is read from 03, and then Dr of 1 is set at the time Tr.
/ 2 is added to obtain time Tr ', and when the difference between time Tr' and time Ts is larger than the threshold value, constants A and B are set to 0.
Time Ts and time Ts when an arbitrary value larger than
The time Tu to be corrected from the value of Tu = (ATr + BT
s) / (A + B), and then the time Tu is set in the system clock device 103. Where the constant A,
The value of B is determined according to the characteristics of the system.

Next, the time correction device 1 having the above configuration
The operation of 01 will be specifically described with reference to FIG. 1 and FIG. FIG. 4 is a flow chart for explaining the operation of the time correction device 101 according to the third embodiment of the present invention.

As shown in FIG. 4, time correction means 104
When the correction timing control unit 105 is activated, reads the time Tr from the real-time clock device 102 (step ST401) and the time Ts from the system clock device 103 (step ST40).
2). For example, it is assumed that Tr is 0:12:23 and Ts is 0: 12: 24: 32.

Next, the time correction means 104 adds Tr '= Tr, which is obtained by adding 1/2 of the update interval Dr to the time Tr, to Tr' = Tr.
Calculate by the formula of + (1/2) Dr (step ST4
03). Next, time correction means 104 determines whether the difference between time Tr ′ and time Ts is larger than threshold value Dt (step ST404). When the difference between time Tr 'and time Ts is larger than the threshold value Dt in step ST404, time correction is performed, and when the difference between time Tr' and time Ts is smaller than the threshold value Dt, time correction is not performed and the process ends. . For example, if the threshold value Dt is 0 seconds 50, the difference between Tr ′ and Ts is 0 seconds 82, which is larger than the threshold value Dt, so the time is corrected.

When the difference between time Tr 'and time Ts is larger than the threshold value Dt in step ST404, the time correction means 104 obtains time Tu to be corrected from the values of time Tr' and time Ts (step ST405). . The time Tu to be corrected is Tu = (ATr '+ BTs) / (A +
It is obtained by the formula of B). Here, the constants A and B are predetermined values larger than 0 and are determined according to the characteristics of the system. For example, if A = B = 1, then Tu = (Tr '
+ Ts) / 2 = 0: 12: 23: 91 is the time Tu to be corrected. Next, the time correction means 104 sets Tu as the time to be corrected in the system clock device 103 (step ST406).

As described above, according to the present embodiment, the time correction means 104 obtains the time Tr 'by adding 1/2 of Dr to the time Tr, and then calculates the difference between the time Tr' and the time Ts. When the constants A and B are set to arbitrary values larger than 0 when the value is larger than the threshold value Dt, the time Tu to be corrected from the values of the time Tr and the time Ts is Tu = (ATr + BTs) / (A +
Since the time Tu is set in the system clock device 103 by the equation B), the maximum error between the real-time clock device 102 and the system clock device 103 can be reduced, and the system time at the time of time correction can be reduced. Since the change amount of can be set according to the system, it is possible to suppress a rapid time change.

(Fourth Embodiment) Next, a time correction device according to a fourth embodiment of the present invention will be described with reference to FIG. In Embodiment 4 of the present invention, Embodiment 1 of the present invention
Components that are the same as are given the same reference numerals. Figure 5
FIG. 9 is a block diagram showing a configuration of a time correction device according to a fourth embodiment of the present invention.

Time correction apparatus 501 according to Embodiment 4 of the present invention is installed in base station apparatus 100a. The time correction device 501 sets the time when the value of the time smaller than the update interval of the real-time clock device 102 in the system that manages the time based on the measurement times of the real-time clock device 102 and the system clock device 103 is 0. To be set to. The real-time clock device 102 generates a clock signal for management. System clock device 103
Generates a clock signal for clocking inside the system.

The time correction device 501 includes a time correction means 104 connected to the real time clock device 102 and the system clock device 103, and the time correction means 1
Correction timing control means 105 connected to 04
A time setting means 503 that receives a notification of the set time from the maintenance device 502, a real time clock setting means 504 connected to the real time clock device 102 and the time setting means 503, and a system clock device 103.
And a system clock setting means 505 connected to the real time clock setting means 504 and the correction timing control means 105.

That is, the time correction device 501 is the same as the time correction device 101 according to the first, second, or third embodiment of the present invention, and further includes time setting means 503, real-time clock setting means 504, and system clock setting means 50.
5 is provided.

Next, the time correction device 5 having the above configuration
The operation of 01 will be specifically described with reference to FIG. 6 and FIG. FIG. 6 is a flowchart for explaining the operation of the time correction device 501 according to the fourth embodiment of the present invention.

Here, as in the first, second or third embodiment, the update interval of the real time clock device 102 is set to Dr.
And the update interval of the system clock device 103 is Ds. Further, as an example, Dr is set to 1 second and Ds is set to 10
Keep it as milliseconds.

The time correction device 501 comprises the time correction means 10
4 is activated by the correction timing control means 105 at fixed time intervals Dw that are multiples of the update interval Dr of the real-time clock device 102, the first embodiment of the present invention,
It operates in the same manner as the time correction device 101 according to 2 or 3. For example, Dw is 10 seconds 00.

Next, a time correction device 5 different from the operation of the time correction device 101 according to the first, second or third embodiment of the present invention.
The operation of 01 will be described.

When the time setting means 503 receives the notification of the set time Tn from the maintenance device 502, the set time Tn is set.
To the real time clock setting means 504 (step ST601). The set time Tn is a time when the value of the time finer than the update interval Dr of the real-time clock device 102 is 0. For example, the set time Tn is
It is 0:12:30.

Next, the real time clock setting means 50
4 indicates the set time Tn by the real time clock device 102.
To the system clock setting means 505 (step ST602). For example, the time of the real-time clock device 102 at the time of setting is 0: 1
2 minutes and 30 seconds.

Next, the system clock setting means 505
Sets the set time Tn in the system clock device 103 (step ST603). For example, the time of the system clock device 103 at the time of setting is 0: 12: 3.
It becomes 0 seconds 50. Further, the real-time clock device 102 at the time of setting is internally set to 0: 12: 30: 30.
However, the time is 0:12:30 according to the update interval Dr.

Next, the system clock setting means 505
Waits for half the update interval Dr (step S
T604). After waiting, the system clock setting means 505 resets the waiting time of the correction timing control means 105 operating at the correction interval Dw to 0 (step ST60).
5). Thereby, the correction timing control means 105
After the correction interval Dw has elapsed, the time correction means 104 is activated. Since the correction interval Dw is a multiple of the update interval Dr, (1/2) Dr after the real time clock device 102 is updated.
The time is corrected at the time. For example, the next correction time is 0: 12: 40.50.

Therefore, the real time clock device 10
It is not necessary to correct even if the time difference between the time 2 and the system clock device 103 has accumulated to some extent. For example,
When the system clock device 103 is 1: 12: 30.50, the error from the real-time clock device 102 is 10
Real-time clock device 1 when 0 milliseconds is accumulated
02 is internally 1: 12: 30.40 or 1: 12: 30.60, but the time is 1:12:30, depending on the update interval Dr. Under this condition, the time is not corrected in the first, second or third embodiment of the present invention.

As described above, according to the present embodiment, in addition to the effect of the first, second or third embodiment of the present invention, the time when the system clock setting means 505 sets the set time Tn in the system clock device 103. Since the system clock setting means 505 waits for half the update interval of the real-time clock device 102 and then returns the standby time of the correction timing control means 105 to 0, a value of a time finer than the update interval of the real-time clock device 102. If the error is small after the time when 0 is set, the correction condition is not satisfied.

(Fifth Embodiment) Next, a time correction device according to a fifth embodiment of the present invention will be described with reference to FIG. In Embodiment 5 of the present invention, Embodiment 4 of the present invention
Components that are the same as are given the same reference numerals.

The time correction apparatus 501 according to Embodiment 5 of the present invention is installed in the base station apparatus 100a. The time correction device 501 sets to the real-time clock device 102 a time when the time value smaller than the update interval of the real-time clock device 102 in the system that manages the time based on the measurement times of the real-time clock device 102 and the system clock device 103 is not 0. It is something to set. The real-time clock device 102 generates a clock signal for management. System clock device 103
Generates a clock signal for clocking inside the system.

The time correction device 501 according to the fifth embodiment of the present invention is similar to the fourth embodiment of the present invention in that the real-time clock device 102 and the system clock device 103.
Time correction means 104 connected to the time correction means 1 and correction timing control means 1 connected to the time correction means 104
05, the time setting means 503 that receives the notification of the set time from the maintenance device 502, the system clock device 103 and the real time clock setting means 504 connected to the time setting means 503, and the system clock device 103.
And a system clock setting means 505 connected to the real time clock setting means 504 and the correction timing control means 105.

That is, the time correction device 501 is different from the time correction device 101 according to the first, second or third embodiment of the present invention in that the time setting means 503, the real time clock setting means 504 and the system clock setting means 50 are further added.
5 is provided.

Next, the time correction device 5 having the above structure
The operation of 01 will be specifically described with reference to FIG. 7 and FIG. FIG. 7 is a flow chart for explaining the operation of time correction device 501 according to the fifth embodiment of the present invention.

Here, as in the first, second or third embodiment, the update interval of the real time clock device 102 is set to Dr.
And the update interval of the system clock device 103 is Ds. Further, as an example, Dr is set to 1 second and Ds is set to 10
Keep it as milliseconds.

The time correction device 501 comprises the time correction means 10
4 is activated by the correction timing control means 105 at fixed time intervals Dw that are multiples of the update interval Dr of the real-time clock device 102, the first embodiment of the present invention,
It operates in the same manner as the time correction device 101 according to 2 or 3. For example, Dw is 10 seconds 00.

Next, a time correction device 5 different from the operation of the time correction device 101 according to the first, second or third embodiment of the present invention.
The operation of 01 will be described.

When the time setting means 503 receives the notification of the set time Tn from the maintenance device 502, the set time Tn is set.
To the real-time clock setting means 504 (step ST701). The set time Tn is a time when the value of the time finer than the update interval Dr of the real-time clock device 102 is not 0. For example, the set time Tn is 0
The time is 12 minutes 30 seconds 25.

Next, the real time clock setting means 50
4 obtains the update time Tn 'of the real-time clock device 102 after the time Tn (step ST7).
02). For example, Tn ′ is 0: 12: 31: 00.

Next, the real time clock setting means 50
4 waits for a time of Tn'-Tn (step ST
703). After waiting, the real-time clock setting means 504 sets the time Tn ′ in the real-time clock device 102 and notifies the system clock setting means 505 of the time Tn ′ (step ST704). For example, at the time of setting, the time of the real-time clock device 102 is 0:12:31.

Next, the system clock setting means 505
Sets the time Tn 'in the system clock device 103 (step ST705). For example, at the time of setting, the time of the system clock device 103 is 0: 12: 3.
1 second is 50. In addition, the real-time clock device 10
Although 2 is 0: 12: 31: 50 internally, the time is 0:12:31 due to the update interval Dr.

Next, the system clock setting means 505
Waits for half the update interval Dr (step S
T706). After waiting, the system clock setting means 505 resets the waiting time of the correction timing control means 105 operating at the correction interval Dw to 0 (step ST70).
7). Thereby, the correction timing control means 105
After the correction interval Dw has elapsed, the time correction means 104 is activated. Since the correction interval Dw is a multiple of the update interval Dr, the time is corrected at the time of (1/2) Dr after the real time clock device 102 is updated. For example, the next correction time is 0
It is 12:41:50.

Therefore, the real-time clock device 10
It is not necessary to correct even if the time difference between the time 2 and the system clock device 103 has accumulated to some extent. For example,
When the system clock device 103 accumulates a time difference of 100 milliseconds from the real-time clock device 102 at 1: 12: 31.50, the real-time clock device 102 internally reads 1: 12: 31.40 or 1:00. 12
Minutes 31 seconds 60, but the time is 1 due to the update interval Dr.
The time is 12 minutes and 31 seconds. Under this condition, the time is not corrected in the first, second or third embodiment of the present invention.

As described above, according to the present embodiment, in addition to the effects of the first, second or third embodiment of the present invention, the system clock setting means 505 sets the set time Tn ′ in the system clock device 103. Since the system clock setting means 505 waits for half the update interval of the real-time clock device 102 from the point in time, the standby time of the correction timing control means 105 is returned to 0, so that a time smaller than the update interval of the real-time clock device 102 is set. The value is 0
The correction condition is not satisfied with a small error after the setting of the non-time.

(Sixth Embodiment) Next, a time correction device according to a sixth embodiment of the present invention will be described with reference to FIG. In Embodiment 6 of the present invention, Embodiment 4 of the present invention
Components that are the same as are given the same reference numerals. Figure 8
FIG. 9 is a block diagram showing the configuration of a time correction device according to a sixth embodiment of the present invention.

Time correction apparatus 801 according to Embodiment 6 of the present invention is mounted on base station apparatus 100c. The time correction device 801 sets the time when the time value smaller than the update interval of the real-time clock device 102 in the system that manages the time based on the measurement times of the real-time clock device 102 and the system clock device 103 is 0. To be set to. The real-time clock device 102 generates a clock signal for management. System clock device 103
Generates a clock signal for clocking inside the system.

The time correction device 801 according to the sixth embodiment of the present invention is a time correction means 1 connected to the real time clock device 102 and the system clock device 103.
04, the correction timing control means 105 connected to the time correction means 104, the time setting means 503 which receives the notification of the set time from the maintenance device 502, the real time clock device 102 and the time setting means 503. The real time clock setting means 504 and the standby time setting means 80 connected to the real time clock setting means 504 and the correction timing control means 105.
It has 2 and.

That is, the time correction device 801 according to the sixth embodiment of the present invention is similar to the time correction device 501 according to the fourth embodiment of the present invention in that the system clock setting means 5 is used.
Instead of 05, a standby time setting means 802 is provided.

Next, the time correction device 8 having the above structure
The operation of 01 will be specifically described with reference to FIG. 8 and FIG. FIG. 9 is a flowchart for explaining the operation of the time correction device 801 according to the sixth embodiment of the present invention.

Here, as in the fourth embodiment, the update interval of the real-time clock device 102 is Dr and the update interval of the system clock device 103 is Ds. Also,
As an example, Dr is set to 1 second and Ds is set to 10 milliseconds.

The time correction device 801 comprises the time correction means 10
4 is activated by the correction timing control means 105 at fixed time intervals Dw that are multiples of the update interval Dr of the real-time clock device 102, the same operation as the time correction device 501 according to the fourth embodiment of the present invention is performed. For example, Dw is 10 seconds 00.

Next, an operation of time correction device 801 different from the operation of time correction device 501 according to the fourth embodiment of the present invention will be described.

When the time setting means 503 receives the notification of the set time Tn from the maintenance device 502, the set time Tn is set.
To the real time clock setting means 504 (step ST901). The set time Tn is a time when the value of the time finer than the update interval Dr of the real-time clock device 102 is 0. For example, the set time Tn is
It is 0:12:30.

Next, the real time clock setting means 50
4 sets the time Tn in the real-time clock device 102 and notifies the standby time setting means 802 of the time Tn (step ST902). Next, the standby time setting means 802 waits for half the update interval Dr (step ST903). Real-time clock setting means 50
After the standby, 4 sets the standby time of the correction timing control unit 105 operating at the correction interval Dw to Dw (step ST904). The correction timing control means 105 immediately activates the time correction means 104 when the waiting time reaches Dw. As a result, the time correction means 104 corrects the time of the system clock device 103 as in the fourth embodiment.

As described above, according to the present embodiment, in addition to the effects of the fourth embodiment of the present invention, it is possible to unify the time settings for the system clock device 103.

(Seventh Embodiment) Next, a time correction device according to a seventh embodiment of the present invention will be described with reference to FIG. In Embodiment 7 of the present invention, Embodiment 4 of the present invention
Components that are the same as are given the same reference numerals.

The time correction device 801 according to the seventh embodiment of the present invention is installed in the base station device 100c. The time correction device 801 sets to the real-time clock device 102 a time when the value of the time smaller than the update interval of the real-time clock device 102 in the system that manages the time based on the measurement times of the real-time clock device 102 and the system clock device 103 is not 0. It is something to set. The real-time clock device 102 generates a clock signal for management. System clock device 103
Generates a clock signal for clocking inside the system.

The time correction device 801 according to the seventh embodiment of the present invention is a time correction means 1 connected to the system clock device 102 and the real-time clock device 103.
04, the correction timing control means 105 connected to the time correction means 104, the time setting means 503 which receives the notification of the set time from the maintenance device 502, the real time clock device 102 and the time setting means 503. The real time clock setting means 504 and the standby time setting means 80 connected to the real time clock setting means 504 and the correction timing control means 105.
It has 2 and.

That is, the time correction device 801 according to the seventh embodiment of the present invention is the same as the time correction device 501 according to the fourth embodiment of the present invention.
Instead of 05, a standby time setting means 802 is provided.

Next, the time correction device 8 having the above structure
The operation of No. 01 will be specifically described with reference to FIG. 10 together with FIG. FIG. 10 is a flowchart for explaining the operation of time correction device 801 according to the seventh embodiment of the present invention.

Here, as in the fourth embodiment, the update interval of the real-time clock device 102 is Dr and the update interval of the system clock device 103 is Ds. Also,
As an example, Dr is set to 1 second and Ds is set to 10 milliseconds.

The time correction device 801 comprises the time correction means 10
4 is activated by the correction timing control means 105 at fixed time intervals Dw that are multiples of the update interval Dr of the real-time clock device 102, the same operation as the time correction device 501 according to the fourth embodiment of the present invention is performed. For example, Dw is 10 seconds 00.

Next, the operation of time correction device 801 different from the operation of time correction device 501 according to the fourth embodiment of the present invention will be described.

When the time setting means 503 receives the notification of the set time Tn from the maintenance device 502, the set time Tn is set.
To the real time clock setting means 504 (step ST1001). The set time Tn is a time when the value of the time finer than the update interval Dr of the real-time clock device 102 is not 0. For example, the set time Tn is 0: 12: 30.25.

Next, the real time clock setting means 50
4 obtains the update time Tn 'of the real-time clock device 102 after the time Tn (step ST1).
002). For example, Tn ′ is 0: 12: 31: 00.

Next, the real time clock setting means 50
4 waits for a time of Tn'-Tn (step ST
1003). The real time clock setting means 504 is
After waiting, the time Tn ′ is set to the real time clock device 102.
And the standby time setting means 802 sets the time Tn ′.
Is notified (step ST1004).

Next, the standby time setting means 802 waits for half the update interval Dr (step ST100).
5). After waiting, the real-time clock setting means 504 sets the waiting time of the correction timing control means 105 operating at the correction interval Dw to Dw (step ST100).
6). The correction timing control means 105 determines that the waiting time is D
When the time becomes w, the time correction means 104 is immediately activated.
As a result, the time correction means 104 corrects the time of the system clock device 103 as in the fourth embodiment.

As described above, according to the present embodiment, in addition to the effects of the fifth embodiment of the present invention, it is possible to unify the time setting in the system clock device 103.

[0110]

As described above, according to the present invention,
It is possible to reduce the maximum time difference between the real-time clock device and the system clock device.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a time correction device according to a first embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the time correction device according to the first embodiment of the present invention.

FIG. 3 is a flowchart for explaining the operation of the time correction device according to the second embodiment of the present invention.

FIG. 4 is a flowchart for explaining the operation of the time correction device according to the third embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a time correction device according to a fourth embodiment of the present invention.

FIG. 6 is a flowchart for explaining the operation of the time correction device according to the fourth embodiment of the present invention.

FIG. 7 is a flowchart for explaining the operation of the time correction device according to the fifth embodiment of the present invention.

FIG. 8 is a block diagram showing a configuration of a time correction device according to a sixth embodiment of the present invention.

FIG. 9 is a flowchart for explaining the operation of the time correction device according to the sixth embodiment of the present invention.

FIG. 10 is a flowchart for explaining the operation of the time correction device according to the seventh embodiment of the present invention.

[Explanation of symbols] 100 base station equipment 101, 501, 801 Time correction device 102 Real-time clock device 103 system clock device 104 time correction means 105 correction timing control means 502 Maintenance device 503 time setting means 504 Real-time clock setting means 505 System clock setting means 802 Standby time setting means

Claims (8)

[Claims] 1. A system clock device that generates a clock signal for clocking, a real-time clock device that generates a clock signal for management at an update interval Dr, and a time Tr that is read from the real-time clock device when activated and The time Ts is read from the system clock device, and then at the time Tr, 1/2 of the update interval Dr is read.
Time Tr 'which is obtained by adding the time Tr' to the system clock device when the difference between the time Tr 'and the time Ts is larger than the threshold value Dt; Fixed time Dw that is a multiple of Dr
And a correction timing control unit that activates the time correction unit for each time. 2. A system clock device that generates a clock signal for clocking, a real-time clock device that generates a management clock signal at an update interval Dr, and a time Tr that is read from the real-time clock device when activated and at the same time. The time Ts is read from the system clock device, and then the constants A and B larger than 0 and the time Tr are read.
And the time Tu to be corrected from the values of the time Ts and Tu =
(ATr + BTs) / (A + B), and then the time correction means for setting the time Tu in the system clock device and the time correction means for each fixed time Dw that is a multiple of the update interval Dr. A time correction device comprising: a correction timing control means. 3. A system clock device that generates a clock signal for clocking, a real-time clock device that generates a clock signal for management at an update interval Dr, and a time Tr that is read from the real-time clock device when activated, and The time Ts is read from the system clock device, and then at the time Tr, 1/2 of the update interval Dr is read.
Then, the time Tr 'is calculated, and then, when the difference between the time Tr' and the time Ts is larger than the threshold value Dt, constants A and B larger than 0, and the values of the time Tr 'and the time Ts. The time Tu to be corrected from Tu = (ATr '+ BT
s) / (A + B), and then a time correction means for setting the time Tu in the system clock device,
A time correction device, comprising: a correction timing control unit that activates the time correction unit every fixed time Dw that is a multiple of the update interval Dr. 4. A time setting means for receiving a notification of a set time from a maintenance device, a real time clock setting means connected to the system clock device and the time setting means, the system clock device and the real time clock setting means. And a system clock setting means connected to the correction timing control means,
The time setting means notifies the real-time clock setting means of the set time Tn when the setting time Tn is notified from the maintenance device, and then the real-time clock setting means makes the set time Tn the real-time clock device. When the value of the time finer than the update interval Dr is 0, the set time Tn is set in the real-time clock device and the system clock setting means is notified, and then the system clock setting means is set by the system clock setting means. Tn is set in the system clock device, and then the system clock setting means waits for half the update interval Dr of the real-time clock device and then returns the waiting time of the correction timing control means to zero. The time correction device according to any one of claims 1 to 3. 5. A time setting means for receiving a notification of a set time Tn from a maintenance device, a real time clock setting means connected to the system clock device and the time setting means, the system clock device and the real time clock setting. Means and a system clock setting means connected to the correction timing control means, wherein the time setting means sets the set time T from the maintenance device.
When the notification of n is received, the setting time Tn is notified to the real-time clock setting means, and then the real-time clock setting means determines that the value of the time when the setting time Tn is finer than the update interval Dr of the real-time clock device is 0. If not, the next update time Tn 'of the real-time clock device after the set time Tn is obtained, and then the real-time clock setting means Tn'-
After waiting for a time of Tn, the time Tn 'is set in the real-time clock device and the system clock setting means is notified, and then the system clock setting means sets the time Tn' in the system clock device, Next, the system clock setting means waits for half the update interval Dr of the real-time clock device and then waits for the correction timing control means to be zero.
The time correction device according to any one of claims 1 to 3, wherein the time correction device is returned to. 6. A time setting means for receiving a notification of a set time from a maintenance device, a real time clock setting means connected to the system clock device and the time setting means, the real time clock setting means and the correction timing control. Standby time setting means connected to the means, and the time setting means receives the setting time Tn from the maintenance device when the setting time Tn is reached.
When the value of the time finer than the update interval Dr of the real time clock device is 0, the set time Tn is notified to the real time clock setting means, and then the real time clock setting means sets the time Tn to the real time. The waiting time setting means sets the clock time and notifies the waiting time setting means. Next, the waiting time setting means waits for half the update interval Dr of the real time clock device and then waits for the correction timing control means. The time correction device according to any one of claims 1 to 3, wherein the fixed time is Dw. 7. A time setting means for receiving a notification of a set time from a maintenance device, a real time clock setting means connected to the system clock device and the time setting means, the real time clock setting means and the correction timing control. Standby time setting means connected to the means, and the time setting means receives the setting time Tn from the maintenance device when the setting time Tn is reached.
When the value of the time finer than the update interval Dr of the real-time clock device is not 0, the set time Tn is notified to the real-time clock setting means, and then the real-time clock setting means is set after the set time Tn. At the next update time Tn ′ of the real-time clock device, and then the real-time clock setting means waits for the time Tn′−Tn and then the time Tn.
n'is set in the real-time clock device and notified to the standby time setting means, and then the standby time setting means waits for half the update interval Dr of the real-time clock device and then the correction timing control means. The time correction device according to any one of claims 1 to 3, wherein the standby time is set to a certain fixed time Dw. 8. A system clock device for generating a clock signal for clocking, a real-time clock device for generating a clock signal for management at an update interval Dr, and a time connected to the system clock device and the real-time clock device. In a time correction device including a correction unit and a correction timing control unit connected to the time correction unit, the correction timing control unit is provided at fixed time intervals Dw that are multiples of the update interval Dr of the real-time clock device. Activating the time correction means, reading the time Tr from the real-time clock device and the time Ts from the system clock device when the time correction means is activated by the correction timing control means, and then the time 1/2 of update interval Dr in Tr And the step of obtaining time Tr ', and then the difference between time Tr' and time Ts is the threshold value Dt.
Setting time Tr ′ in the system clock device when the time Tr ′ is larger than the time.