JPS6036148B2 - Failure handling method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fault handling method for communication line equipment in a functionally distributed control switching system.

Conventionally, in order to prevent interference with call processing, fault processing such as equipment switching in a switching system has been carried out by interrupting the call processing in progress at the moment a fault is detected and not performing any other processing, including call processing. executed. For this reason, call processing is not executed while the fault processing is being executed, and the fault processing time becomes a call processing interruption time, and as the fault processing time becomes longer, there is a risk that the switching service will deteriorate in proportion to the length of the fault processing time. In fault processing of communication line equipment including terminal equipment in a function distributed control switching system, when setting the status of the terminal equipment when performing system switching, all lines included in the faulty equipment are subject to status setting processing. Therefore, in a system with a large number of communication path devices and a large station scale, the failure processing time has a greater influence on the call processing of other normal devices, and becomes the cause of protection processing of switching operations. An object of the present invention is to provide a system that solves the above-mentioned drawbacks, and by executing failure processing of communication line equipment in a function distributed control switching system in parallel at the same level as call processing, the time required for call processing interruption is reduced. The present invention provides a failure handling method that can shorten the time required for switching and prevent service deterioration in exchange processing.

In order to achieve the above object, the present invention comprises a signal processing device that controls communication line equipment including switching terminal equipment, and a central processing unit that centrally controls a plurality of the signal processing equipment, and performs call processing. In a function distributed control switching system that performs switching processing by dividing the processing level into a call processing level for processing and a fault processing level for processing a fault, the signal processing device is provided with a fault identification function and a call change detection stop activation function, and the signal processing device is provided with a fault identification function and a call change detection stop activation function; The central processing unit is provided with a failure encounter display function, a switching function of communication path equipment, and a state resetting function, and when a failure occurring in the communication path equipment is detected by the failure identification function at the failure processing level, switching is performed. The call path system device in which the fault has occurred is switched by the function, the call change detection processing is stopped by the call change detection stop activation function, and the call change detection processing is stopped by the call change detection stop activation function, and the call information related to the fault device in the central processing unit is changed by the fault encounter display function. Only setting of a failure encounter display is performed, and at the call processing level, the status resetting function performs a state setting process related to the communication path device on which the failure encounter display is displayed. It is. Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 shows an embodiment of the present invention, Fig. 2 shows a correspondence diagram between the conventional method of control sequence in fault handling and the present method, and Fig. 3 shows the functional block configuration of the fault-related device according to the present invention. This is an example. In Figure 1, 11, 21
12 and 22 are track equipment (TRK), 13 and 23 are signal processing equipment (SPE), 1
4 and 24 are signal reception distribution devices (SRD), 5 is a central processing unit, 11 to 14 are active system devices, and 21 to 24 are standby system devices.

Switching processing is generally performed at the processing level that performs normal call processing (
(hereinafter referred to as B level) and the processing level (hereinafter referred to as B level) that handles failures (
If the central processing unit (CC) 5 detects a fault in the communication path equipment 11, 12, the call processing at the B level is interrupted, and the fault processing for the corresponding equipment is carried out at the F level. executed.

In this method, in this F-level fault processing, the standby communication path equipment (SFi) 21 and the trunk equipment (TRKi)
) 22 is not set, and the central processing unit (CC) 5
Only a failure encounter display is set for the call information related to the confirmation device in the system, and call processing is immediately restarted from the B-level interruption point. In B-level processing restarted after failure processing,
Central processing unit (CC) 5 and standby signal processing unit (SP)
Ei) By means of the means for controlling the stop and start of change detection for the call that is displayed as having encountered a failure, which is provided in 23, the call processing is performed in parallel with the call processing of other normal devices (not shown) that are not subject to failure processing. Performs status setting processing for the line that is displayed as having encountered a failure. In FIG. 1, a communication path system device SP is a time division communication path with a TST configuration (T: time switch, S: space switch), and is a part that forms a communication path for call processing.
Failures such as memory element failure, loss of synchronization, parity error, etc. within this network may occur, and in this case, communication may be disabled or voice abnormality may occur. To detect these faults, when creating a communication path, the central processing unit (CC) 5 sends a path control order to the communication path system equipment (SP). When detected, the central processing unit (CC) 5 is notified of the information through the signal line. Central processing unit (CC)
5, the flip-flop group (FFG) has this fault presence/absence indication, and this flip-flop group (FFG)
G) can be detected by periodically scanning or interrupting the communication line system (SP). Next, the trunk device (TRK) is a part that detects transmission/reception of dialed digits, response/disconnection, etc., and a circuit failure may cause a call to be disconnected or a call to be disconnected incorrectly. This failure is caused by signal processing equipment (SPE)
) is monitoring, and a failure is reported to the central processing unit (CC) 5 along with the signal processing unit (SPE).
The TRKi-SPEi relationship is similar to the SPi-CC relationship. Next, the signal processing equipment (SPE) is the trunk equipment (
TRK), and if this processor becomes faulty, the TRKi group (generally several 100 to several 1000 lines) that it controls becomes unavailable, and all lines housed in the SPi become unavailable for calls. .

This fault detection is carried out by the central processing unit (CC), which uses the signal processing unit (
It sends trunk control orders (sending dialed digits, receiving response signals, etc.) to the SPE, and monitors failures at this time. The detection method is the same as in the case of communication path system equipment (SP). For example, when a call is in progress, the trunk device (T
RK) maintains a busy state, but when detecting a failure and switching to the standby system, it is necessary to set the standby system to a busy state.

In the case of a signal processing equipment (SPE) failure, it is necessary to set the status of hundreds to thousands of trunk devices (TRKs) (the status of each line before the failure), and the more lines there are, the more difficult this status setting becomes. In other words, it takes time to process the failure. FIG. 2 shows the control sequence in the above fault handling method in comparison with the conventional method. Conventionally, when a fault occurs, the fault processing for module #1 is given top priority, while the normal module #1 is processed with the highest priority. The exchange processes #2 and #3 cannot be performed all at once. This method is simple because it does not require consideration of interference with normal modules, but the larger the scale of the module or the larger the number of normal modules, the more likely the impact on normal parts will be.
For example, if a problem occurs while receiving numbers, an incorrect connection will occur).

On the other hand, in the method according to the present invention, a failure encounter indication is performed at F level for switching of a failure device and a call related to the device,
This makes it possible to execute the reproduction processing of the successor device and the call processing of normal processing in parallel at the same B level. In other words, by displaying a failure encounter in the call information, only the minimum necessary processing is performed at the F level, and the status settings of individual lines (hardware switching processing) are performed by the call processing of modules #2 and #3. It is possible to execute it while Next, FIG. 3 shows an example of the functional block configuration of a failure-related device,
Reference numerals 31 to 33 indicate a communication path terminal system, 34 indicates a fault-related device, and in the internal configuration of the fault-related device 34, 35 is a fault identification section, 36 is a call change detection stop/activation section, 37 is a state resetting section; Reference numeral 38 indicates an obstacle encounter display section, and 39 indicates a switching section.

When a failure occurs among the plurality of communication path terminal systems 31 to 33, the failure identification unit 35 detects the failure, and then the switching unit 39 switches the Tsubaki-jin device at the F level, and the failure encounter display unit 38
A failure encounter display is set for the call related to the confirmation device, and change detection for the call is stopped and the activation unit 36 stops it to prevent logical contradiction. The state setting unit 37 sets the state of the harmful call to the state before the failure.
Play with.

Note that at the end of the playback process, the change detection is stopped again, and the startup unit 36
triggers change detection for the call. Furthermore, the operation after detecting a failure will be explained in sequence below.

If a failure is detected (it is necessary to stop call processing such as call detection for the 1 Momme Gunsho module).

(Change Detection Stop, Startup Unit 36) (At the same time as n, it displays a failure status for each line of the failure module, and displays a status that allows failure processing to be executed in parallel with call processing.

(Obstacle Encounter Display Unit 38) The dish x dog behavior resetting unit 37 is a part that stores the state of each line before the occurrence of a failure.

(W) Based on the failure encounter display, reproduce the line status after switching from the data of the status resetting unit 37, stop change detection for the completed line, and cancel the call processing stop by the activation unit 36; Enables call processing like a normal module.

(The V-pigeon switching unit 39 is a part that has the function of actually switching the device by relay control or the like.

In addition, to explain the correspondence of each device between FIG. 1 and FIG.
1 and the trunk device 12, and is a generic term for the failure-related device 3.
Reference numeral 4 indicates functional blocks included in the signal processing device 13 and central processing unit 5 in FIG.

On the other hand, the signal processing device 13 shown in FIG. 1 has a fault identification function 35 and a call change detection/stop/start unit 36 shown in FIG.

The central processing unit 5 shown in FIG. 1 also has a status resetting function 37, a failure encounter display section 38, and a failure device switching function 39. Therefore, FIG. 1 shows the physical system configuration, and FIG. 3 shows the functional configuration. As explained above, according to the present invention, call processing and fault processing can be executed in parallel at the same level in fault processing of communication path equipment in a functional distributed control switching system with many devices and large station size. This has the advantage of making it possible to shorten the call processing interruption time and preventing service deterioration in switching processing.

[Brief explanation of the drawing]

Fig. 1 is an example of a fault handling method according to the present invention, Fig. 2 is a correspondence diagram between a conventional method of control sequence in fault processing and the present method, and Fig. 3 is a functional block configuration of a fault-related device according to the present invention. An example of each is shown below. 11, 21: communication path system device, 12, 22: trunk device, 13, 23: signal processing device, 14, 24: signal reception distribution device, 5: central processing unit, 31, 32, 33: communication path terminal system, 34: Fault-related device, 35: Fault identification unit, 36
:Call change detection stop, activation part, 37: Status reset part, 38
: Obstacle encounter display section, 39: Switching section. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1 Consists of a signal processing device that controls communication line equipment including switching terminal equipment and a central processing unit that centrally controls multiple signal processing equipment, and performs call processing level and failure handling. In a function distributed control switching system that performs switching processing by dividing processing levels into fault processing levels, the signal processing device is provided with a fault identification function and a call change detection stop activation function, and the central processing unit is provided with a fault encounter display function; A switchover function and a status resetting function are provided for the communication path system device, and when a fault occurring in the communication path system device is detected by the fault identification function at the fault processing level, the switching function Switch the device,
The call change detection stop activation function stops the call change detection process, the failure encounter display function only sets a failure encounter display for call information related to the failure device in the central processing unit, and the call processing 2. A failure handling method, wherein the status resetting function performs status setting processing for the communication line equipment for which the failure encounter display has been displayed at the level.