JPS6033768A - System for transferring congested information - Google Patents

Abstract

PURPOSE:To execute properly the regulation to congested subscriber/area by executing overload control depending on the type of congested information and the importance of an exchange of sender in a telephone network when a regulation controller is overloaded. CONSTITUTION:An interface controller 7 transfers subscriber information C1 relating to a subscriber exchange 1 and area congested information C2 relating to a representative exchange 2' registered in advance to a regulation controller 8 while not always being limited regardless of the loading state of the controller 8 and supplies limitation commanded by overload control information L from the controller 8 only to the congested information C2 relating to a relay line exchange 2. Thus, the regulation to the subscriber congestion is executed without exception and the regulation to the area congestion is also executed properly.

Description

DETAILED DESCRIPTION OF THE INVENTION (al) Technical Field of the Invention The present invention relates to a congestion information transfer system, and particularly to subscriber congestion information sent from a plurality of subscriber line exchanges and regional congestion information sent from a plurality of trunk line exchanges. Collect and
An interface control device that transmits information to the regulation control device, and analyzes the subscriber congestion information and regional congestion information transmitted from the interface control device to create necessary regulation information, and transmits the information to the subscriber via the interface control device. The present invention relates to an overload control method for a traffic control system having a line switch and a regulation control device for transmitting information to a trunk line switch.

fbl Technical Background In the telephone network, there is so-called call congestion, which disrupts the communication function of the telephone network because calls arriving in disaster areas such as earthquakes and typhoons, or to specific subscribers who make telephone reservations, are concentrated in the area. may occur.

Attempts have been made to apply a traffic control system that detects such call congestion at an early stage, eliminates the cause, and prevents disruption of the communication function of the telephone network. FIG. 1 is a diagram showing an example of the configuration of a traffic control system to which the present invention is applied. In FIG. 1, a subscriber congestion detection device 3 installed in each subscriber line exchange 1 (=J) constituting the telephone network detects the operating status of each subscriber line exchange 1 (for example, the total threading rate of the incoming register). ), and transmits the operating status to the interface control device 7 as subscriber congestion information cl at predetermined intervals.The subscriber congestion detection device 3 also detects when an incoming call congestion has occurred among the accommodated subscribers ( For example, the number of overflow calls exceeds a predetermined value) is detected, and the telephone number of the subscriber and the degree of congestion (for example, the number of overflow calls) is detected.
is included in the subscriber congestion information c1 and transmitted to the inkface control device 7. -1 The area detection device 5 attached to each trunk exchange ta2 detects the
The operation status (for example, the total threading rate of the register sender) is monitored at any given time, and the operation status is transmitted to the interface control device 7 at predetermined intervals as regional congestion information C2. In addition, the regional congestion detection device 5 detects a trunk line that is in a state of incoming call congestion (for example, the total busy rate has exceeded a predetermined value) among the accommodated trunk lines, and detects the trunk line number and the degree of congestion (for example, the total Busy rate) is calculated based on the area congestion information C2.
and transmits it to the interface control device 7. The ink face control device 7 is commonly installed in a plurality of subscriber line exchanges 1 and trunk exchanges 2, and receives subscriber congestion information CI and regional congestion information transmitted from each subscriber line exchange 1 and trunk exchange 2 under its control. C2 is collected and transmitted to the regulation control device 8. The regulation control device 8 is installed in common with a plurality of interface control devices 7, and receives subscriber congestion information c transmitted from each affiliated subscriber line exchange tal and trunk line exchange 2 via each interface control device 7.
1 and regional congestion information C2, and if it is determined that incoming call congestion (hereinafter referred to as regional congestion) has occurred in a specific area, regional regulation information r2 including telephone numbers to be restricted, restriction rate, etc. Create and other regulatory control devices 8
The information is transmitted simultaneously via each interface control device 7 to the restriction devices 4 and 6 installed in all the subscriber line exchanges 1 and the trunk exchange 2, thereby restricting calls to the area. In addition, the regulation control device 8 analyzes the degree of congestion of a specific subscriber included in the subscriber congestion information c1 transmitted from each subscriber line exchange 1 under its control via the inkface control device 7, If it is determined that a problem (referred to as congestion) has occurred, the restriction device 4 attached to each subscriber line exchange 1 within the range related to the subscriber (for example, within the same economic area) is notified of the telephone number to be restricted. Subscriber restriction information r1 including restriction rate etc. is transmitted via each interface control device 7, and calls to the subscriber are restricted. Note that when a large number of subscriber congestion information c1 or regional congestion information c2 is concentrated in a field, the regulation control device 8 becomes overloaded and cannot perform proper traffic control. In such a case, the regulation control device 8
transmits overload control information to each interface control device 7, and limits the transfer of subscriber congestion information 11cl and regional congestion information c2 based on predetermined criteria.

(C) Prior Art and Problems FIG. 2 is a diagram showing an example of a conventional congestion information transfer method in this type of interface control device. In FIG. 2, subscriber congestion information 11c1 and regional congestion information C2 sent from each subscriber congestion detection device 3 and regional congestion detection device 5 (FIG. 1) are sequentially sent to a reception buffer 10 via a reception circuit 9. Accumulated. If the overload control information is not transmitted from the regulation control device 8 (FIG. 1) to the interface control device 7, the output gate 11 is then in a conductive state, and the subscriber congestion information c1 accumulated in the reception buffer 10 is transmitted. The regional congestion information c2 is transferred to the regulation control device 8 via the transmission circuit 12 without any restrictions. On the other hand, the device control information 11rfJ information r1 and regional regulation information r2 constituted by the regulation control device 8 are sent to the reception buffer 14 via the reception circuit 13.
After being accumulated in the overload control information identification circuit 15, the overload control information is identified as being different from the overload control information, and is transferred to the regulating devices 4 and 6 (FIG. 1) via the transmission circuit 16. On the other hand, when the regulation control device 8 becomes overloaded and transmits overload control information in order to limit subscriber congestion information cl and regional congestion information c2 transferred by the interface control device 7, the overload control information Receiving circuit 13
After being accumulated in the reception buffer 14 via the overload control information identification circuit 15, the overload control information is recognized as overload control information and is transmitted to the overload control level determination circuit 17. The overload control level determination circuit 17 compares the received overload control information with the degree of restriction (hereinafter referred to as overload control level) registered in advance in the overload control level registration memory 18, and
Determine the overload control level to be implemented. Thereafter, the overload control level determination circuit 17 puts the output gate 11 in a blocking state at a frequency specified by the overload control level, and places a predetermined limit on the subscriber congestion information CI and the regional congestion information C2 stored in the reception buffer 10. is added and transferred to the regulation control device 8.

As is clear from the above explanation, in the conventional congestion information transfer method, when the regulation control device 8 becomes overloaded, the interface control device 7 transmits data from the subscriber line switch 1 and trunk line switch 2 under its control. The subscriber congestion information 11cl and regional congestion information C2 that are provided are uniformly controlled based on a predetermined overload control level. However, regional congestion is information on regional congestion collected from a wide range +1
Since the judgment is made comprehensively from JC2, large errors in judgment can be avoided even if some regional congestion information C2 is missing, but subscriber congestion cannot be judged if the subscriber congestion information C1 regarding the subscriber is missing. Therefore, restrictions on subscribers who are in a state of incoming call congestion will not be implemented, resulting in the inability to prevent disruption of the communication function of the telephone network. Also, when determining regional congestion comprehensively, each trunk switch 2 that sends out regional congestion information C2 has a difference in scale or role, and the regional congestion information C2 from the particularly important trunk switch 2 is If overload control is performed to the same extent as the regional congestion information c2 from other trunk exchanges ta2, there is a possibility that appropriate l-rahisoku control cannot be performed.

(dl Purpose of the Invention The purpose of the present invention is to eliminate the drawbacks of the conventional congestion information transfer method as described above, and to detect the type of congestion information and the telephone number of the sending exchange when the regulation control device is overloaded. Implement overload control taking into account the importance of the network,
The object of this invention is to realize an information transfer system that can implement traffic control according to actual conditions.

tel Structure of the Invention The purpose of this invention is to provide an interface control system that collects subscriber congestion information sent from a plurality of subscriber line exchanges and regional congestion information sent from a plurality of trunk line exchanges, and transmits the collected information to a regulation control device. analyze the subscriber congestion information and regional congestion information transmitted from the device and the interface control device to create necessary regulatory information, and transmit it to the subscriber line switch and trunk line switch via the interface control device. a traffic control system having a regulation control device that identifies the local congestion information transmission source trunk exchange as a designated representative exchange; The regional congestion information regarding the representative exchange and the subscriber congestion information regarding the subscriber line exchange are transferred to the restriction control device without any restriction, and the local congestion information regarding trunk line exchanges other than the representative exchange is transmitted to the restriction control device. This is achieved by providing the ink face control device with a second means for applying regulation according to an overload control instruction transmitted from the device.

(f) Examples of the invention An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a diagram showing a congestion information transfer method according to an embodiment of the present invention. Note that the same reference numerals refer to the same objects throughout the plan. In FIG. 3, the interface control device 7 plays a particularly important role in determining regional congestion among the trunk line exchanges 2 under its control that collect regional congestion information C2 (for example, the one that accommodates the largest number of lines). One or more trunk line exchanges 2 are selected as representative exchanges tJl12' and registered in advance in the exchange registration memory 20 provided in the ink face control device 7. Also, exchange registration memory ”2
All subscriber line exchange tals are also registered in 0. Subscriber congestion information c1 sent from subscriber congestion detection device 3 attached to subscriber line exchange 1, regional congestion information 02' sent from regional congestion detection device 5' attached to representative exchange 2', and representative The regional congestion information c2 sent from the regional congestion detection device 5 attached to the trunk switch 2 other than the switch 2' (hereinafter simply referred to as the trunk switch 2) is transmitted to the reception buffer 10 via the reception circuit 9.
are accumulated sequentially. The exchange identification circuit 19 receives subscriber data from the reception buffer 10 (so information c1, area congestion information c
Each time 2 and C2' are sequentially extracted, subscriber line exchange 1 and representative exchange 2 registered in exchange registration memory 20 are
', and if it is determined that the subscriber congestion information CI regarding the subscriber and line exchange 2' and the local congestion information 02' regarding the representative exchange 2', the transmission circuit is directly transmitted without going through the output game 1-11. 12 to the regulation control device 8. On the other hand, if there is a region related to the trunk switch 2 that is not registered in the switch registration memory 20 (so information C
If it is determined to be 2, the signal is transmitted to the transmitting circuit 12 via the output gate 11. As in FIG. 2, the output gate 11 is in a conductive state when the regulation control device 8 is in a normal load state, so the regional congestion information C2 is also transmitted via the transmitting circuit 12 without being subject to any restrictions. The information is transferred to the regulation control device 8. On the other hand, when the regulation control device 8 is in an overload state and transmits overload control information indicating a predetermined overload control level, the overload control level determination circuit 17 registers the overload control level as in FIG. The overload control level to be implemented is determined with reference to the memory 18, and the conduction state of the output gate 11 is controlled based on the overload control level, thereby controlling the transfer of the regional congestion information C2.

As is clear from the above description, according to this embodiment, the interface control device 7 collects the subscriber congestion information c1 regarding the subscriber line exchange 1 and the representative exchange 2 registered in advance.
For regional congestion information C21 regarding ', regulation u;
11 system f "Regardless of the load state of the 11 unit W8, it is transferred to the regulation control device 8 without being restricted, and the relay switch 2
The restriction control device 8 applies restrictions instructed by the overload control information only to the regional congestion information c2 related to the above.

Therefore, regulations regarding subscriber congestion can be implemented without fail, and judgments regarding local congestion can be made appropriately.

It should be noted that FIG. 3 is merely one embodiment of the present invention, and for example, the configuration of the interface control device 7 is not limited to that shown in the figure, and many other modifications may be considered. Even in this case, the effects of the present invention remain the same. Further, the configuration of the traffic control system to which the present invention is applied is not limited to that shown in the drawings, and many other modifications may be considered, but the effects of the present invention remain the same in any case.

[gl Effects of the Invention According to the present invention, even when the regulation control device becomes overloaded in the traffic control system,
Regulations regarding subscriber congestion can be implemented without exception, regulations regarding regional congestion can also be implemented based on appropriate judgment, and traffic control can be implemented in accordance with the actual situation.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of the configuration of a traffic control system that is a target of the present invention, FIG. 2 is a diagram showing an example of a conventional congestion information transfer method, and FIG. 3 is a diagram showing an example of a congestion information transfer method according to an embodiment of the present invention. FIG. 3 is a diagram showing a transfer method. In the figure, 1 is a subscriber line switch, 2 is a trunk line switch,
2' is a representative exchange, 3 is a subscriber congestion detection device, 4 and 6 are regulation devices, 5 and 5' are area) congestion detection devices, 7 is an interface control device, 8 is a regulation control device,
9 and 13 are receiving circuits, 10 and 14 are receiving buffers, 11 is an output gate, 12 and 16 are transmitting circuits, 1
5 is an overload control information identification circuit, 17 is an overload control level determination circuit, 18 is an overload control level registration memory, 19 is an exchange identification circuit, 20 is an exchange registration memory, cl is subscriber congestion information, C2 and 02' indicates regional congestion information, rl indicates subscriber regulation information, r2 and r2' indicate regional regulation information, and L indicates overload control information. See Figure 1 Figure 2 Figure I Figure 3

Claims (1)

[Claims] An interface control device that collects subscriber congestion information sent from a plurality of subscriber line exchanges and regional congestion information sent from a plurality of trunk line exchanges and transmits it to a regulation control device; and a regulation control device that analyzes the subscriber congestion information and regional congestion information to create necessary regulation information and transmits it to the subscriber line exchange and trunk line exchange via the interface control device. In the system, a first means for identifying that the trunk exchange that sends the local congestion information is a predetermined representative exchange; and a first means for identifying the local congestion information regarding the representative exchange identified by the first means; The subscriber congestion information regarding trunk line exchanges is transferred to the restriction control device without any restrictions and is transmitted to the subscriber congestion information regarding trunk line exchanges other than the representative exchange. A congestion information transfer method, characterized in that the interface control device is provided with a second means for regulating area congestion information in accordance with an overload control instruction transmitted from the regulation control device.