JP2003066170A - Apparatus and method for time control of cpu board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a time control apparatus for CPU board which is mounted easily and by which a method of dealing with the control of a network can be realized without stopping an operation due to a time change. SOLUTION: When a power supply is turned on at a transmission device 2, a CPU board 1 can be operated, and the time for an RTC 11 is set as the time for stating operation. When the time is set at the CPU board 1 by an OSI communication from an external terminal, an AP 13 calculates the difference between the time for the RTC 11 and the set time, and a calculated result is stored in a memory 16. When a setting processing operation is completed normally, the CPU board 1 makes a processed result respond to the external terminal 3 as a request source and an external terminal 4 other than it. After that, when a time acquisition request with reference to the CPU board 1 is received from the external terminals 3, 4, the AP 13 acquires the time in the reception of the acquisition request from the RTC 11, and the time in which the calculated result stored in the memory 16 is added or subtracted responds to the external terminals 3, 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time management device and method for a CPU board, and more particularly to management of time information in a CPU card mounted on a transmission device.

[0002]

2. Description of the Related Art In recent years, a transmission device is required to have an advanced supervisory control function and a reliable communication protocol, and a card having a CPU (central processing unit) is often mounted.

When this CPU card is mounted on a transmission device, time information becomes essential information when an external terminal such as WS (workstation) performs various operations on the CPU card of the transmission device.

[0004]

SUMMARY OF THE INVENTION The conventional CPU described above.
In managing the time information on the board, since the time of the device is set to the correct time, the time is set regularly from the external terminal during the operation of the device, so the time setting during the operation of the device is an essential function. .

However, the O mounted on the CPU board
In S (operating system), CPU
RTC (real time clock) in the board
Since the CPU manages the timer information such as the inactivity monitoring timer, it is necessary to implement some countermeasure when directly controlling the time of the RTC of the CPU board.

Therefore, an object of the present invention is to solve the above-mentioned problems, to implement easily, and to realize a method for coping with network management in which operation is not stopped by changing the time, and a time management device for a CPU board and the same. To provide a method.

[0007]

A time management device for a CPU board according to the present invention comprises an OSI (open system).
s interconnection protocol and TCP / IP (transmission control)
ol protocol / internetproto
col) protocol and implements at least one of
A time management device that manages the time of a CPU board that realizes at least one function of SI protocol inactivity monitoring and TCP / IP protocol keepalive, and an RTC (re) that manages time in the CPU board.
Al time clock) and management means for managing the difference between the time of the RTC and the time set from the outside.

A time management method for a CPU board according to the present invention is an OSI (open systems interc).
connection) protocol and TCP / IP (t
transmission control proto
col / internetprotocol) protocol and implements at least one function of inactivity monitoring of the OSI protocol and at least one of keepalive of the TCP / IP protocol. RTC (real time) for managing the time in the CPU board
The step of managing the difference between the clock) time and the time set externally is provided.

That is, the time management device of the CPU board of the present invention is an OSI (open systems int).
communication protocol, or TCP
/ IP (transmission control)
protocol / internet protocol
l) A CPU that implements the protocol and realizes the function of OSI inactivity monitoring or TCP / IP keep-alive.
The board does not affect these functions and the CPU
It provides a method of managing the time of the board.

More specifically, the CPU of the present invention
In the board time management device, the CPU board manages the time in the board by RTC (real time clock).
k) and OSI protocol or TCP / IP protocol are implemented, and an OS (operating system) that manages an inactivity monitoring timer or keep-alive time.
system (including a communication stack), an application (AP) that manages the difference between the RTC time and the set time, and a CPU.

When the application is RTC time and CPU
By managing the difference between the time set on the board and the time set on the board, the time on the CPU board is managed without directly controlling the time on the RTC, which affects the inactivity monitoring timer and keep-alive time managed by the OS. Will not be affected.

[0012] With such a structure, it is possible to easily implement the above problems and to provide a method for coping with network management in which operation is not stopped due to time change.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a CPU board according to an embodiment of the present invention. In FIG. 1, a CPU board 1 has an RTC (real time clock) 11 for managing the time in the board and an O.
SI (open systems interconn)
section) protocol, or TCP / IP (tr
enmission control protoc
OS (including communication stack) that manages the inactivity monitoring timer and keep-alive time by implementing the ol / internet protocol) protocol, and R
An application (AP) 13 that manages the difference between the time of the TC 11 and the time set from the outside, and a CPU 14.

The OS 13 manages the time of the CPU board 1 without directly controlling the time of the RTC 11 by the application 13 managing the difference between the time of the RTC 11 and the time set on the CPU board 1 from the outside. It does not affect the managed inactivity monitoring timer or keep-alive time.

FIG. 2 is a block diagram showing the configuration of a transmission device using a CPU board according to an embodiment of the present invention. In FIG. 2, the external terminal 3 is a CP installed in the transmission device 2.
Performs OSI communication with U board 3 and external terminal 4 is CPU
Performs TCP / IP communication with the board 1.

That is, the external terminals 3 and 4 are CPs, respectively.
It is connected to the U board 1 with an Ethernet (R) cable,
The external terminal 3 can perform OSI communication with the CPU board 1, and the external terminal 4 can perform TCP / IP communication with the CPU board 1. Further, the external terminals 3 and 4 can set the time and acquire the time with respect to the CPU board 1, respectively.

The CPU board 1 is mounted on the transmission device 2,
The RTC 11 that manages the time in the board, the OS 12 that performs inactivity monitoring control and keep-alive control, the AP 13 that manages the time set by the external terminals 3 and 4, and the control from the external terminals 3 and 4 AP15 is installed, and AP13 is a part of AP14. The CPU board 1 has a CPU 1 for operating the APs 13 and 14.
4 and the memory 16 are mounted.

FIG. 3 is a flow chart showing the operation of the AP 13 of FIG. The processing operation of time setting and time acquisition in the time management according to the embodiment of the present invention will be described with reference to FIGS.

First, when the power of the transmission device 2 is turned on, the CPU board 1 becomes operable. Here, as described above, the external terminal 3 is a terminal capable of establishing a connection for the OSI communication with the CPU board 1, and the external terminal 4 is a C terminal.
Communication between the PU board 3 and TCP / IP is possible.

The CPU board 1 sets the time of the RTC 11 as the time of startup (step S1 in FIG. 3). When the time is set on the CPU board 1 by OSI communication from the external terminal 3,
If the time of RTC 11 is controlled as it is, OS1
It affects the inactivity monitoring timer and the keep-alive timer managed by 2, and the OSI connection between the external terminal 3 and the CPU board 1 or the external terminal 4 and the CP.
The TCP / IP connection with the U board 1 is disconnected.

Therefore, for example, when the time change request is received from the external terminal 3 (step S2 in FIG. 3), the AP 13 mounted on the CPU board 3 calculates the difference between the time of the RTC 11 and the set time ( Figure 3 Step S
3), the calculation result is stored in the memory 16 (step S4 in FIG. 3).

When the setting process is completed normally (step S5 in FIG. 3), the CPU board 1 responds with the processing result to the external terminal 3 which is the request source and the external terminals 4 other than that (step S6 in FIG. 3). Here, the external terminal 4 that is not the request source is notified of the old time and the new time of the CPU board 1 as the processing result.

Thereafter, the external terminals 3 and 4 to the CPU board 1
When a time acquisition request is received (step S in FIG. 3)
7), the AP 13 acquires the time when the acquisition request is received from the RTC 11 (step S8 in FIG. 3), and adds and subtracts the calculation result (difference between the time of the RTC 11 and the set time) stored in the memory 16 to the time. It responds to the external terminals 3 and 4, respectively (steps S9 and S10 in FIG. 3).

When the time setting request is received again from the external terminal 3 or the external terminal 4, the AP 13 calculates the regular time based on the calculation result stored in the RTC 11 and the memory 16, and compares the time with the setting request. The difference is stored in the memory 16 as the calculation result.

By the above control, the time of the RTC 11 is not influenced in the time setting for the CPU board 1, so that it does not affect the inactivity monitoring timer or the keep alive timer managed by the OS 12.

As described above, the time change of the CPU board 1 for managing the device time changes the RTC used by the OS 12 for management.
11 does not affect the time, so even if the device time managed by the CPU board 1 is changed, the transmission device 2 and the OS
The connection with the external terminals 3 and 4 which keep-alive management by I connection or TCP / IP is not disconnected.

Further, since it is not necessary to re-establish a connection with the external terminals 3 and 4 by changing the time when the transmission device 2 is in operation, it is possible to change the time while the transmission device 2 is in operation.

Further, an RT for managing the time of the transmission device 2
Only one C11 needs to be installed, and it is not necessary to separately install the time management RTC of the transmission device 2 and the OS RTC. Therefore, it is possible to easily implement the above problem and provide a method for coping with network management that does not stop operation due to time change.

FIG. 4 is a block diagram showing the configuration of a transmission device using a CPU board according to another embodiment of the present invention.
In FIG. 4, a plurality of CPU cards 5, 5 are provided in the transmission device 7.
The configuration when 6 exists is shown. That is, the configuration shown in FIG. 4 shows a configuration in the case where the CPU board needs to be divided into a plurality of pieces in order to divide the functions of the processing in the transmission device 7.

The external terminal 3 performs OSI communication with the CPU board 5, and the external terminal 4 communicates with the CPU board 6 and TCP / IP.
Communicating. The CPU boards 5 and 6 are the CPU board 5 and the CPU in addition to the configuration of the CPU board 1 shown in FIG.
Board 6 and Ethernet (R) cable or RS (re
It is possible to communicate with each other by using a 232C cable or the like.

When the time is set from the external terminal 3 to the CPU board 5, the CPU board 5 is C shown in FIG.
The PU board 1 is controlled and the time information set from the external terminal 3 is set to the CPU board 6.
Similar to the CPU board 5, the CPU board 6 executes the same control as the CPU board 1 shown in FIG. 2, and when the setting process is normally completed, the CPU board 6 returns a control result to the CPU board 5. The CPU board 5 responds with the processing result to the external terminal 3 according to the processing result of its own board and the processing result of the CPU board 6.

When the time setting request is received from the external terminal 4, the CPU board 6 sets the time information to the CPU board 5 in the same manner as described above, and according to the processing result of the CPU board 5 and the processing result of its own board. , And returns the processing result to the external terminal 4.

When the time is set from the external terminal 3, as a result of the processing by the CPU board 6, the external terminal 4 is notified of the time change notification. It is possible to set the time. Similarly, when the time is changed from the external terminal 4, the CP
Since the U board 5 notifies the external terminal 3 of the time change notification, the times of the external terminals 3 and 4 can be adjusted.

In the above embodiments of the present invention and other embodiments, the case where the CPU boards 1, 5 and 6 are mounted on the transmission devices 2 and 7 has been described, but the time setting and time acquisition as described above are performed. The present invention can be applied to any device that requires

[0035]

As described above, the present invention implements at least one of the OSI protocol and the TCP / IP protocol, and monitors the inactivity of the OSI protocol and TCP / IP.
When managing the time of the CPU board that realizes at least one of the keep-alive functions of the IP protocol, the CP
By managing the difference between the time of the RTC that manages the time in the U board and the time set from the outside, it is possible to realize a network management method that is easy to implement and that does not stop the operation due to the time change. The effect that it can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a CPU board according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a transmission device using a CPU board according to an embodiment of the present invention.

FIG. 3 is a flowchart showing the operation of the application of FIG.

FIG. 4 is a block diagram showing a configuration of a transmission device using a CPU board according to another embodiment of the present invention.

[Explanation of symbols]

1, 5, 6 CPU board 2,7 Transmission device 3,4 External terminal 11 RTC 12 OS 13,15 application 14 CPU 16 memory

Claims (6)

[Claims] 1. An OSI (open systems i)
connection) protocol and TCP
/ IP (transmission control)
protocol / internet protocol
l) implement at least one of the protocols and
A time management device for performing time management of a CPU board that realizes at least one function of protocol inactivity monitoring and TCP / IP protocol keepalive,
RTC (real that manages the time in the CPU board)
A time management device comprising: a time clock) and a management means for managing a difference between the time of the RTC and the time set from the outside. 2. The time according to claim 1, wherein the management unit is configured to calculate the time of the RTC and the difference and notify the outside when a time acquisition request from the outside is received. Management device. 3. The management means is an application that manages the difference between the time of the RTC and the time set in the CPU board without directly controlling the time of the RTC. Alternatively, the time management device according to claim 2. 4. OSI (open systems i)
connection) protocol and TCP
/ IP (transmission control)
protocol / internet protocol
l) implement at least one of the protocols and
A time management method for performing time management of a CPU board that realizes at least one function of protocol inactivity monitoring and TCP / IP protocol keepalive.
RTC (real that manages the time in the CPU board)
A time management method comprising a step of managing a difference between a time of (time clock) and a time set from the outside. 5. The step of managing the difference is characterized in that when a time acquisition request is received from the outside, the time of the RTC and the difference are calculated and notified to the outside. The time management method described. 6. The step of managing the difference is the R
Without directly controlling the time of TC, the time of the RTC and the time of the C
The time management method according to claim 4 or 5, wherein the time management method is executed by an application that manages a difference from the time set in the PU board.