JPH04123561A - Path control system for common line signal network - Google Patents

Abstract

PURPOSE:To obtain the system with a high efficiency by collecting fault information by a common line signal network management station on the occurrence of a fault and allowing the common line signal network management station to set an optimum path. CONSTITUTION:When a fault detection means 21 of a common line signal relay station 2 detects a fault, the means 21 sends fault information to the common line signal network management station 1 through a network management private line 3, the common line signal network management station 1 uses a fault information reception means 11 to receive fault information and references the content of a path management master table storage means 12 depending on the result to decide an optimum path and sends the path setting information to each common line signal relay station 2. Each common line signal relay station 2 uses a path setting information reception means 22 to receive path setting information and to revise the content of a path management local table storage means 23. Thus, the path control on the occurrence of a fault is implemented by the common line signal network management station 1 to facilitate the setting of the optimum path. Thus, the common line signal network is efficiently controlled.

Description

[Detailed Description of the Invention] [Summary] A common line signal network management station that manages a common line signal network, and a plurality of common line signal relay stations each connected to the common line signal network management station by a dedicated network management line. Regarding the route control method for the common line signaling network, when a fault occurs, the common line signaling network management station collects fault information and sets the optimal route at the common line signaling network management station. The purpose of this system is to provide a route control system for signal networks.When a station fault or line fault is detected by a fault detection means, a common line signal relay station transmits the fault information to the common line signal network via a network management dedicated line. The common line signal network management station sets the optimal route by referring to the route management master table storage means according to the failure situation, and sends the optimal route information via the network management dedicated line. The optimum route information is transmitted to the common line signal relay station, and the common line signal relay station writes the optimum route information in the route management local table storage means, and determines the route according to the written route information.

[Industrial application field]

The present invention relates to a common line signaling network consisting of a common line signaling network management station that manages the common line signaling network, and a plurality of common line signaling relay stations each connected to the common line signaling network management station by a dedicated network management line. Regarding road control methods.

In recent years, a common line signaling method has been widely adopted in which multiple private branch exchanges are connected by a signal link called a common line, control signals are sent and received between the private branch exchanges, and multiple private branch exchanges are linked to provide various services. It's coming.

If a failure occurs in a signal link in such a common line signal network, an abnormality notification signal (hereinafter referred to as a network management signal) is sent between each common line signal relay station to prevent the signal from flowing in that route. However, as the number of common line signal relay stations increases,
The number of network management signals increases, and the common line network is overwhelmed by the network management signals.

In addition, since route control is performed independently at each common line signal relay station,
In some cases, it may not be possible to perform optimal route control from the perspective of the mesh body.

A route setting method for such a common line signal network is required to be efficient without putting pressure on the common line network.

[Conventional technology]

FIG. 11 is a block diagram illustrating a conventional common line signal relay station, and FIG. 12 is a diagram illustrating a route control procedure in the conventional example.

In the conventional example shown in FIG. 11, 21A is a fault detection circuit;
2B is a failure information transmitting/receiving circuit, 23B is a route management table, 30 is a central control unit, 4o is a main storage device, 50 is a network, and 61 to 6N are signal link connections.

When the fault detection circuit 21A detects a fault, the common line signal relay station that detected the fault sends a network management signal (hereinafter referred to as TF) to other common line signal relay stations via the fault information transmission/reception circuit 22B.
(referred to as P signal).

The common line signal relay station that receives the TFP signal at the fault information transmitting/receiving circuit 22B uses the fault information to transmit the TFP signal to the route management table 23B.
Refer to this page to set a new route.

A conventional route control system will be explained with reference to FIG. 1st
Figure 2 shows common line signal relay stations A, B, C, D, E, F (
(hereinafter referred to as station A, station B, station 0, station D2, station E, and station F)
This is an example in which a common line signal network is constructed from six stations.

(a) The thick line shows the flow of common line signals from station A to station F when all routes are normal.

At station A, the common line signal for station F is set to be relayed through station 0.

(b) A state in which a route abnormality between stations C and F is detected at stations 0 and F is shown.

At this time, station 0 is connected to stations A and B, and station F is connected to stations D and E.
Sends FP signal.

Stations A, B, D, and E that have received the TFP signal set failure information in their respective route management tables 23B.

(c) A state in which a common line signal is issued from station A to station F when there is an abnormality in the route between stations C and F is shown.

At this time, the A station refers to the route management table 23B of the A station, and shows a state in which the route for the F station is set to relay the D station.

(d) Indicates a state in which a failure has occurred in station C, and shows a state in which a common line signal relay station connected to station C is transmitting a TFP signal.

At this time, when a common channel signal is issued from station A to station F, station A sets the route for station F to relay through station D, as in (C).

[Question 1 that the invention attempts to solve! When a failure occurs in the conventional example shown in FIG.
Since this is done using signals, a route that has become congested due to network abnormality will be further compressed by the TFP signal, leading to an abnormal convergence condition.

Furthermore, since each common channel signal relay station independently manages routes, there may be cases where it cannot be said that route management is optimal from the perspective of the entire common channel signal network.

Furthermore, each common line signal relay station needs to have different route management data, so when changing the conditions of the common line signal network (for example, increasing or decreasing the number of common line signal relay stations), all common line signal relay stations must be It is necessary to rewrite the route management data of the station at the same time, and it is necessary to prepare a large number of maintenance engineers at the same time to change the route management data.

The present invention provides an efficient route control method for a common line signaling network by collecting fault information at a common line signaling network management station and setting an optimal route at the common line signaling network management station when a failure occurs. The purpose is to provide.

[Means to solve the problem]

FIG. 1 shows a block diagram illustrating the invention in detail.

In the block diagram of the principle of the present invention shown in FIG. 1, 1 is a common channel signal network management station, 11 is a fault information receiving means for receiving fault information sent from the common channel signal relay station 2,
Reference numeral 12 denotes a route management master table storage means for setting the optimum route for the entire common channel signal network based on failure information, and 13 transmits optimum route setting information set from the contents of the route management master table storage means 12. This is a table transmitting means.

Further, 2 is a common line signal relay station, 21 is a fault detection means for detecting a fault and transmitting fault information to the common line signal network management station 1, and 22 is a fault detection means for detecting a fault and transmitting fault information to the common line signal network management station 1. 23 is a route management local table storage means for storing the route setting information received by the route setting information receiving means 22; 3 is a common route setting information receiving means; This is a dedicated network management line that connects the line signal network management station 1 and the common line signal relay station 2.

In the common line signal relay station 2, when a station failure or a line failure is detected by the failure detection means 21, the failure information is transmitted to the common line signal network management station l, and the common line signal network management station 1 detects the failure situation. Accordingly, the optimum route is set with reference to the route management master table storage means 12, and the optimum route information is transmitted to the common channel signal relay station 2.

The common line signal relay station 2 writes the received optimal route information in the route management local table storage means 23 and determines the route according to the written route information, thereby solving this problem. .

[For production]

The common line signal relay stations 2 are each connected to the common line signal network management station 1 via a dedicated network management line 3.

Here, when a failure is detected by the failure detection means 21 of the common line signal relay station 2, failure information is transmitted to the common line signal network management station 1 through the network management dedicated line 3.

In the common channel signal network management station 1, the failure information is received by the failure information receiving means 11, and based on the result, the optimum route is determined by referring to the contents of the route management master table storage means 12, and the route setting information is transmitted to each The signal is transmitted to the common line signal relay station 2.

At each common line signal relay station 2, the route setting information receiving means 22
As a result, the route setting information is received and the contents of the route pipe ring local table storage means 23 are changed.

By controlling the route when a failure occurs with only one station, the common line signal network management station 1, the optimum route can be easily set, and the TFP signal is shared with the common line signal network control station 1. Since the signals are transmitted and received through the dedicated network management line 3 directly connected to the line signal relay station 2, the common line signal network can be efficiently controlled without putting pressure on the common line network with TFP signals.

(Example) The gist of the present invention will be specifically explained below with reference to Examples shown in FIGS. 2 to 10.

FIG. 2 is a block diagram explaining a common line signal network management station according to an embodiment of the present invention, FIG. 3 is a block diagram explaining a common line signal relay station according to an embodiment of the present invention, and FIG. 4 is a block diagram explaining a common line signal relay station according to an embodiment of the present invention. A diagram explaining an example of a common line signal network according to an embodiment, FIG. 5 is a diagram explaining a route control procedure according to an embodiment of the present invention, and FIG. 6 is a diagram illustrating a common line signal relay station according to an embodiment of the present invention. FIG. 7 is a diagram explaining the route management local table of the common channel signal relay station in the case of a link failure according to the embodiment of the present invention. FIG. FIG. 9 is a diagram illustrating the route management master table of the common line signal network management station in the embodiment of the present invention, and FIG. 1 and 2 show diagrams illustrating the route control system at the time of station failure according to the embodiment of the present invention.

Note that the same reference numerals indicate the same objects throughout the figures.

IIA of the embodiment of the present invention shown in FIG. 2 is a failure information receiving circuit 12 that receives failure information from the common line signal relay station 2.
A is a route management master table for setting the optimum route based on failure information, and 13A is a route information transmitting circuit for transmitting the set route information to the common line signal relay station 2.

Further, the central control device 30, main storage device 40, network 50, and signal link connections 61 to 6N are the same as those described in the conventional example.

In the embodiment of the present invention shown in FIG. 3, 21A is a failure detection circuit that detects station failures and link failures, and 22A is route setting information that receives route setting information sent from the common channel signal network management station 1. The receiving circuit 23A is a route management local table into which received route setting information is written.

Further, the central control unit 30, main memory 40, network 50, and signal link connections 61 to 6N have the same contents as in FIG.

FIG. 4 shows an example of a common line signal network, in which the common line signal network is composed of six stations: a common line signal network management station 1 and common line signal relay stations A to F.

Here, the link from station A to station 0 is referred to as L1, the link from station A to station B is referred to as L2, and the link from station A to station D is referred to as L3.

FIG. 5 shows the route control procedure.

(a) Indicates a normal state; for example, a common line signal from station A to station F is transmitted via station 0.

(b) Detect a link failure between stations C and F, and station 0,
This shows a state in which failure information is transmitted from station F to the common channel signal network management station 1 through the network management dedicated line 3.

(C) Based on the received failure information, the common channel signal network management station 1 refers to the route management master table 12A to set a route, and transmits route control signals to be changed to stations A to F.

(d) Shows the flow of common line signals from station A to station F using the changed new route.

In this case, the common line signal from the A station to the F station is transmitted via the D station.

FIG. 6 shows the contents of the route management local table 23A that performs the route control described above. When the route management-next table T21 is searched by the incoming common channel signal relay station number C, the route management secondary table T22 is The route selection condition d, the first route number e, and the second route number f are specified.

FIG. 7 shows changes in the route management local table 23A of the common line signal relay station when the route between C and F of the common line signal network shown in FIG. 4 becomes abnormal.

(a) Route management tables T21 and T22 when the route between C station and F station is normal; if the route is normal, route L1 is selected; (signal link is unavailable), route L3 is designated.

(b) shows route management tables T21 and T22 in the case of a primary failure between stations C and F; 1. Although the route selection condition is 1, the first route number and the second route number in the route management table T22 are the same as in (a).

(C) shows route management tables T21 and T2 in case of secondary failure between stations C and F (all signal links in the route are unusable)
2, L3 is set as the first route number, and L2 is set as the second route number.

FIG. 8 shows the contents of the route management master table 12A of the common line signal network management station 1. In the case of route abnormality, failure detection signals are sent from the two common line signal relay stations d and e. When searching route management-next table Tll and route management secondary table T12 from two relay station numbers d and e,
The route management tertiary table T13 is searched, and from there, the first route number g in the normal state, the second route number g, and the first route number in the abnormal state.
A route number i and a second route number j are determined.

FIG. 9 shows the contents of the route management master table 12A for controlling station A when the route between stations C and F in the common signal network of FIG. 2 becomes abnormal.

First, when the common line signal network management station 1 is notified of the 0 station and the F station as route abnormality detection common line signal relay station numbers, the 0 station,
From station F, the route management tertiary table T13 is searched, and A
The first route number L1 and the second route number L3 when the station is selected and normal, and the first route number L3 and the second route number L2 when the station is abnormal.
is required.

Figure 10 shows the route control method for A station when C station fails, (aJ Normal route from A station to F station, 0))
Route from station A to station F when station C fails, (C) Route management table T21, T22 for station A during normal operation, (d) Route management table T21, T for station A during abnormality.
22, (e) shows the route management master tables Tll, TI2, and T13 of the common channel signal network management station 1 (not shown).

In this case, during normal times, the first route number L1, second route number L3, during abnormal times, the first route number L3, second route number L
2 is entered.

By configuring as described above, the route management function at the common line signal relay station is no longer required, and the optimum route is set only by the common line signal network management station. can be controlled.

〔Effect of the invention〕

According to the present invention as described above, route control in the event of a failure is performed centrally at the common line signal network management station, thereby improving efficiency, eliminating the burden on the common line due to abnormality notification signals, and It is possible to provide a route control system for a common line signal network that allows easy changes to the common line signal network.

[Brief explanation of the drawing]

FIG. 1 is a block diagram explaining the present invention in detail, FIG. 2 is a block diagram explaining a common line signal network management station according to an embodiment of the present invention, and FIG. 3 is a block diagram explaining a common line signal network management station according to an embodiment of the present invention. FIG. 4 is a diagram illustrating an example of a common channel signal network according to an embodiment of the present invention; FIG. 5 is a diagram illustrating a route control procedure according to an embodiment of the present invention; FIG. 7 is a diagram explaining the route management local table of the common channel signal relay station according to the embodiment of the present invention, and FIG. FIG. 8 is a diagram illustrating the route management master table of the common line signaling network management station according to the embodiment of the present invention, and FIG. 10 is a diagram illustrating the route control method in the event of a station failure according to the embodiment of the present invention. FIG. 11 is a block diagram illustrating a conventional common line signal relay station. 12 are diagrams explaining the route control procedure of the conventional example, respectively. In the figure, 1 is a common line signal network management station, 2, A-F are common line signal relay stations, 3 is a dedicated network management line, 11 is a fault information receiving means, 11A is a fault information receiving circuit, and 12 is a route management Master table storage means, 12A is a route management master table, 13 is a table transmission means, 13A is a route information transmission circuit, 21 is a failure detection means, 21A is a failure detection circuit, 22 is a route setting information reception means, 22A is a 22B is a route setting information receiving circuit, 22B is a fault information transmitting and receiving circuit, 23 is a route management local table storage means, 23A is a route management local table, 23B is a route management table, 30 is a central controller, 40 is a main storage device , 50 is the network, 61 to 6N are signal link connection parts, Tll, T21 are route management-next table, T12, T2
2 is a secondary route management table, party T13 is a tertiary route management table, and Ll, L2, and L3 are links. Block diagram illustrating detailed explanation of the present invention FIG. 1 FIG. 2 FIG. 3; Network management dedicated line □; Common line signal link Diagram illustrating an example of a common line signal network according to an embodiment of the present invention FIG. 4 FIG. 6 Figure 9 Figure 11 (a) (C) Enemies threaten side route sum rap + No. FP (I) N (J) 19 nails; -10 RT = 1 epsilon map

Claims (1)

[Claims] A common line signal network management station (1) that manages a common line signal network;
A route control system for a common line signal network consisting of a plurality of common line signal relay stations (2) each connected to the common line signal network management station (1) by a dedicated network management line (3), the common line signal network management station (1) comprising: The line signal network management station (1) includes a fault information receiving means (11) for receiving fault information sent from the common line signal relay station (2), and a fault information receiving means (11) for receiving the fault information sent from the common line signal relay station (2), and determining the optimum method for the entire common line signal network based on the fault signal. It has a route management master table storage means (12) for setting a route, and a table transmission means (13) for transmitting optimal route setting information set from the contents of the route management master table storage means (12). and the common line signal relay station (2
) detects a fault and sends the fault information to the common line signal network management station (
1); and a route setting information receiving means (21) for receiving route setting information for setting an optimal route sent from the common channel signal network management station (1).
22), and route management local table storage means (2) for storing the route setting information received by the route setting information receiving means (22).
3), when the fault detection means (21) detects a station fault or line fault, the common line signal relay station (2) transmits the fault information via the network management dedicated line (3). and the common line signal network management station (
1), and the common line signal network management station (1) stores the route management master table storage means (1) in accordance with the failure situation.
2), sets the optimum route, transmits the optimum route information to the common line signal relay station (2) via the network management dedicated line (3), and sends the optimum route information to the common line signal relay station (2). In (2), the route control of the common line signal network is characterized in that the optimum route information is written in the route management local table storage means (23) and the route is determined according to the written route information. method.