JPH05327872A - Call relief system at file replacement - Google Patents

Abstract

PURPOSE:To eliminate a call loss at file replacement by controlling a call received by an old software by the old software and transferring the control to new software in the unit of lines after the call is interrupted. CONSTITUTION:Processors of duplicate configuration are separated into processors (C0,C1) of systems 0, 1 and the 0 system is operated in on-line by a current software version A loaded in a 0 system use on-line software storage device F0 and the 1 system is operated in on-line by a current software version B loaded in a 1 system use on-line software storage devqce F1 from an on-line software storage medium M0 by a magnetic tape or the like to set simultaneous execution of the new/old software. When the state is transited, a C1 system starts restart processing and in this case, the CO system is not stopped and both the CO system and the Cl system are transited during the usual operation by the software version B.

Description

Detailed Description of the Invention

[0001]

The present invention relates to telephone, data, ISDN.
The present invention relates to a call rescue method when updating software (file replacement) in an exchange, etc., and particularly to a call rescue method when file replacement without interruption of call service utilizing the fact that each processor has a duplex configuration.

[0002]

2. Description of the Related Art Conventionally, an AC processor system for disconnecting a duplex processor and continuing call service online is known.
SBY is the processor system for offline processing
The system is configured as a (standby) system, and new software is loaded into a file backup device such as an SBY system disk device while the call service is continued in the ACT system. In order to operate this new software, a system is adopted in which a restart process is activated to switch the system (ACT system → SBY system or SBY system → ACT system). When this system is switched, all the calls processed by the old ACT system are initialized for restart process activation. After that, the contents of the old ACT system memory are copied to the new ACT system to perform call relief, but the relief range is only during a call (or during communication) in which the call is in a stable state. Further, in the case of the method in which the memory copy from the old ACT system to the new ACT system is not performed, all calls are not relieved and are initialized.

[0003]

In the above-mentioned conventional method, since the software for controlling the call is switched to the new software after the file replacement at once, a part or all of the call controlled by the old software until just before the switching is performed. There is a drawback that a call loss occurs because the new software cannot be inherited.

An object of the present invention is to control a call for which a call has been accepted by the old software before file replacement until the call is disconnected, and to control the call from the next call by the new software. An object of the present invention is to provide a call relieving method at the time of file replacement, which eliminates the call loss that has occurred at the time of replacement.

[0005]

According to the call relief method at the time of file replacement of the present invention, a processor having a dual configuration is separated into two systems and the two systems capable of independent operation are simultaneously operated online. Calls that were controlled by the old software by selectively controlling which system controls each transmission line to the subscriber terminal and the exchange, which is a single transmission system, on a line-by-line basis, respectively. It is characterized by notifying new software when it is disconnected.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a state transition diagram of one processor of an exchange showing an embodiment of a call relief system at the time of exchanging files of the present invention. One of the exchanges composed of a single processor or a multiprocessor is duplicated. The state transition about a processor is shown.

During normal operation of FIG. 1 (a) and FIG. 1 (b)
It is the same as the conventional method while implementing the new software. In the present embodiment, the dual processor is separated into 0-system and 1-system processors (C0, C1), and one system, for example, 0-system, is installed in the 0-system online software storage device F0. Software (software version A)
And the other system 1 is online running with the new software (software version B) loaded from the online software storage medium M0 such as a magnetic tape into the online software storage device F1 for system 1 State (Fig. 1
(C)). When transitioning to this state, restart processing is activated in the C1 system, but at this time, unlike the conventional method, C
Do not stop the 0 system. Then, both the C0 system and the C1 system transit to the normal operation with the software version B (see FIG. 1).
(D)).

FIG. 2 is a diagram showing a connection configuration example of the terminals, the transmission lines and the processor system in FIG. The subscriber terminal or partner exchange T0, which is a single duplexer, and the processors C0 and C1 in the own exchange are connected by a line (including a transmission line) L0. The feature of this connection is that L0 is C0, C for each line
It is to connect with 1 system. By adopting this connection configuration, the share controlled by each processor during the above-mentioned simultaneous execution of the new and old software can be made on a line-by-line basis.

FIG. 3 is a software function diagram in FIG. 1, and FIG. 4 is a diagram showing a control flow between both systems during simultaneous operation of both systems in FIG. P0 is an existing software group before the present invention is applied, and P1 is a simultaneous operation control program for both systems, which has a function of performing restart processing only by its own system without affecting other systems and a simultaneous operation management function. Description will be made taking as an example the case where the new and old software in FIG. First, in this state, the simultaneous operation start signal S0 is transmitted from the C1 system simultaneous operation control program P1 to the C0 system P1, and S0 is notified from the C0 system P1 to the line control program P3. Upon receiving S0, the line control program P3 sets a control flag for each line so as not to control all unused lines at the time of reception, and at the same time does not control the line by using the control line notification signal S1. All lines are notified to P3 via P1 of C1 system. In P3, which has received the control line notification signal S1, a control flag indicating that all the notified lines are controlled by the own system is set for each line.
At this point, simultaneous operation is actually started. After this, C0
When the line (call) being used in the system is disconnected, the disconnection is notified to the existing software group P0 to P3 of the C0 system and P
In 3, the own system control flag is set to off (not controlled by the own system), and the line disconnection signal S2 is sent to P3 of the C1 system. Upon receiving the line disconnection signal S2, P3 sets its own system control flag to ON (controlled by its own system), and the own system starts control of this line. This line disconnection signal S2 is repeatedly notified on a line-by-line basis until the line controlled by C0 becomes 0. When the line controlled by C0 becomes 0, the simultaneous operation end signal S3 is transmitted to P1 of the C1 system, the simultaneous operation ends, and the normal operation shown in FIG. The system-to-processor communication program P2 has a function of transmitting and receiving the signals S0 to S3.

[0010]

As described above, according to the present invention, when updating (replacement) a file, one system runs the old software and the other system runs the new software at the same time, and the call accepted by the old software is the old software. The control is performed in accordance with (1), and after the call is disconnected, the control is transferred to the new software on a line-by-line basis.

[Brief description of drawings]

FIG. 1 is a state transition diagram of one processor of an exchange showing an embodiment of a call relief system at the time of file replacement according to the present invention.

FIG. 2 is a diagram showing a connection configuration example of a terminal, a transmission line and a processor in FIG.

FIG. 3 is a software function diagram in FIG.

4 is a diagram showing a control flow between both systems during simultaneous operation of both systems in FIG.

[Explanation of symbols]

 C0 0 system processor C1 1 system processor F0 C0 system online software storage device F1 C1 system online software storage device M0 online software storage medium A, B software version T0 Subscriber terminal or partner exchange L0 line (including transmission line) P0 Existing software group P1 Simultaneous operation control program for both systems P2 Processor communication program for both systems P3 Line control program S0 Simultaneous operation start signal S1 Control line notification signal S2 Line disconnection notification signal S3 Simultaneous operation end signal

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI Technical display location H04L 12/48 H04M 3/22 Z 8426-5K

Claims (1)

[Claims] 1. A processor having a duplex configuration is separated into two systems, and the two systems capable of independent operation are simultaneously operated online so that a transmission path to a subscriber terminal and a switch, which is a duplex system, is provided. It is characterized in that each of the dual processor systems selectively controls which system controls on a line-by-line basis and notifies the new software of this when a call controlled by the old software is disconnected. Call relief method when files are replaced.