JPH0480582B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to a congestion information transfer system, and in particular to a congestion information transfer method, in which subscriber congestion information is transmitted from a plurality of subscriber line exchanges, and regional congestion information is transmitted from a plurality of trunk line exchanges. an interface control device that collects information and transmits it to a regulation control device; and an interface control device that analyzes the subscriber congestion information and regional congestion information transmitted from the interface control device to create necessary regulation information; The present invention relates to an overload control method in a traffic control system having a regulation control device that transmits information to the subscriber line exchange and trunk line exchange via an ACE control device.

(b) Background of the technology In the telephone network, the communication function of the telephone network is disrupted due to an abnormal concentration of incoming calls to disaster areas such as earthquakes and typhoons, or to specific subscribers who make telephone reservations. Congestion may occur.
Attempts have been made to apply a traffic control system that detects such incoming call congestion at an early stage and eliminates the cause, thereby preventing 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 attached to each subscriber line exchange 1 constituting the telephone network constantly monitors the operating status of each subscriber line exchange 1 (for example, the total blockage rate of input registers). Then, the operating status is transmitted to the interface control device 7 at predetermined intervals as subscriber congestion information c1. Further, the subscriber congestion detection device 3 detects a subscriber who is in a call congestion state (for example, the number of overflow calls has exceeded a predetermined value) among the accommodated subscribers, and detects the subscriber's telephone number and the congestion degree ( For example, the number of overflow calls) is included in the subscriber congestion information c1 and transmitted to the interface control device 7. On the other hand, the regional congestion detection device 5 attached to each trunk switch 2 constantly monitors the operating status of each trunk switch 2 (for example, the total blockage rate of register senders), and checks the operating status for regional congestion at predetermined intervals. It is transmitted to the interface control device 7 as information c2. Also, 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 records the trunk line number and the degree of congestion (for example, the total busy rate) in the area. Congestion information c2
and transmits it to the interface control device 7.
The interface control device 7 is commonly installed in a plurality of subscriber line exchanges 1 and trunk exchanges 2, and subscriber congestion information c1 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 restriction control device 8 is commonly installed in a plurality of interface control devices 7, and receives subscriber congestion information c1 and information transmitted from each subscriber line switch 1 and trunk line switch 2 under its control via each interface control device 7. Comprehensively analyzes 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 restriction information r2 is created, including telephone numbers that should be restricted, restriction rates, etc. , through other regulation control devices 8 and each interface control device 7, to the regulation devices 4 and 6 attached to all subscriber line exchanges 1 and trunk line exchanges 2, and calls to the area are be regulated. 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 interface 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 abnormally concentrated, the regulation control device 8 becomes overloaded and cannot perform proper traffic control. In such a case, the restriction control device 8 transmits the overload control information L to each interface control device 7 to restrict the transfer of subscriber congestion information c1 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, each subscriber congestion detection device 3 and regional congestion detection device 5 (FIG. 1)
The subscriber congestion information c1 and the regional congestion information c2 sent from the network are sequentially stored in the receiving buffer 10 via the receiving circuit 9. Regulation control device 8
If the overload control information L is not transmitted to the interface control device 7 from FIG. The information c2 is transferred to the regulation control device 8 via the transmission circuit 12 without any restrictions. On the other hand, the subscriber regulation information r1 and the regional regulation information r2 transmitted from the regulation control device 8 are stored in the reception buffer 14 via the reception circuit 13, and then are converted into overload control information L by the overload control information identification circuit 15. It is identified as different and transferred via the transmission circuit 16 to the regulating devices 4 and 6 (FIG. 1). On the other hand, when the regulation control device 8 becomes overloaded and transmits the overload control information L in order to limit the subscriber congestion information c1 and the regional congestion information c2 transferred by the interface control device 7, the overload control information L is accumulated in the reception buffer 14 via the reception circuit 13, and then recognized as the overload control information L by the overload control information identification circuit 15.
The signal is transmitted to the overload control level determining circuit 17. The overload control level determination circuit 17 compares the received overload control information L with the degree of restriction (hereinafter referred to as overload control level) registered in advance in the overload control level registration memory 18, and determines the overload to be implemented. Determine control level. Thereafter, the overload control level determining circuit 17 sets the output gate 11 to the blocking state at a frequency specified by the overload control level, and blocks the receiving buffer 10.
The subscriber congestion information c1 and the regional congestion information c2 stored in the subscriber congestion information c1 and the regional congestion information c2 are transferred to the regulation control device 8 with predetermined restrictions.

As is clear from the above explanation, in the conventional congestion information transfer system, when the regulation control device 8 becomes overloaded, the interface control device 7 transfers information from the subscriber line switch 1 and the trunk line switch 2 under its control. The transmitted subscriber congestion information c1 and regional congestion information c2 are uniformly controlled based on a predetermined overload control level. However, regional congestion is regional congestion information c2 collected from a wide range.
Since the judgment is made comprehensively from the above, it is possible to avoid major errors in judgment even if some regional congestion information c2 is missing, but subscriber congestion cannot be judged if the subscriber congestion information c1 related to the subscriber is missing. As a result, restrictions on subscribers who are in a state of incoming call congestion will not be implemented, and disruption of the communication function of the telephone network cannot be prevented. Also, when comprehensively determining regional congestion, each trunk switch 2 that sends out regional congestion information c2 has a difference in scale or role.
If the local congestion information c2 from the trunk switch 2 is overloaded to the same extent as the local congestion information c2 from the other trunk exchanges 2, there is a risk that appropriate traffic control may not be carried out.

(d) 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 source exchange when the regulation control device is overloaded. The object of the present invention is to realize a congestion information transfer system that can implement overload control that takes into account the importance of the telephone network and can implement traffic control that is in accordance with the actual situation.

(e) Structure of the Invention The purpose is to provide an interface 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. Ace control device analyzes the subscriber congestion information and regional congestion information transmitted from the interface control device to create necessary regulatory information, and transmits the information to the subscriber line exchange and relay via the interface control device. a traffic control system having a regulation control device for transmitting information to a line exchange, a first means for identifying that a trunk line exchange from which the regional congestion information is transmitted is a predetermined representative exchange; The identified regional congestion information regarding the representative exchange and the subscriber congestion information regarding the subscriber line exchange are transferred to the regulation control device without any restriction, and the local congestion information regarding trunk line exchanges other than the representative exchange is transferred to the above-mentioned. This is achieved by providing the interface control device with a second means for applying regulation in accordance with an overload control instruction transmitted from the regulation control device.

(f) Embodiment of the invention An embodiment of the 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 indicate the same objects throughout the figures. 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, ) One or more trunk line exchanges 2 are selected as representative exchanges 2' and registered in advance in the exchange registration memory 20 provided in the interface control device 7. All subscriber line exchanges 1 are also registered in the exchange registration memory 20. Subscriber congestion information c1 sent from the subscriber congestion detection device 3 attached to the subscriber line exchange 1, regional congestion information c sent from the regional congestion detection device 5' attached to the representative exchange 2'.
2' and trunk switch 2 other than representative switch 2'
Regional congestion information c2 sent from the regional congestion detection device 5 attached to the trunk switch 2 (hereinafter simply referred to as the trunk switch 2) is sequentially stored in the receiving buffer 10 via the receiving circuit 9. Exchange identification circuit 1
9 is the subscriber congestion information c from the receiving buffer 10.
1. Every time the regional congestion information c2 and c2' is extracted sequentially, it is checked against the registered subscriber line exchange 1 and representative exchange 2' in the exchange registration memory 20,
When it is determined that the subscriber congestion information c1 regarding the subscriber line exchange 1 and the regional congestion information c2' regarding the representative exchange 2' are transmitted, the regulation control device 8 is transmitted directly through the transmission circuit 12 without going through the output gate 11. Transfer to. On the other hand, if it is determined that the local congestion information c2 is related to a trunk exchange 2 that is not registered in the exchange registration memory 20, it is transmitted to the transmission circuit 12 via the output gate 11.
As in FIG. 2, the output gate 11 is always 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 L 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 the present embodiment, the interface control device 7 responds to the subscriber congestion information c1 regarding the subscriber line exchange 1 and the regional congestion information c2' regarding the representative exchange 2' registered in advance. is always transferred to the regulation control device 8 without being restricted regardless of the load state of the regulation control device 8, and overload control information L is transmitted from the regulation control device 8 only to the regional congestion information c2 regarding the trunk switch 2. Add the restrictions dictated by.
Therefore, regulations regarding subscriber congestion can be implemented without exception, and regional congestion can also be appropriately determined.

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. In either case, the effects of the present invention remain the same. Furthermore, 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; however, the effects of the present invention remain the same in any case.

(g) Effects of the Invention As described above, according to the present invention, even if the regulation control device becomes overloaded in the traffic control system, regulation for subscriber congestion can be carried out without omission, and regulation for regional congestion can be carried out without exception. Regulations can 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 the subject 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 congestion information 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 exchange, 2 is a trunk exchange, 2' is a representative exchange, 3 is a subscriber congestion detection device, 4 and 6 are regulating devices, 5 and 5'
1 is a regional congestion detection device, 7 is an interface control device, 8 is a regulation control device, 9 and 13 are reception circuits, 10 and 14 are reception buffers, 11 is an output gate, 12 and 16 are transmission circuits, 15 is an overload control an information identification circuit; 17 an overload control level determining circuit; 18 an overload control level registration memory;
19 is an exchange identification circuit, 20 is an exchange registration memory, c1 is subscriber congestion information, c2 and c
2' is regional congestion information, r1 is subscriber regulation information,
r2 and r2' represent regional regulation information, and L represents overload control information.

Claims (1)

[Claims] 1. 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; a regulation control device that analyzes the subscriber congestion information and regional congestion information transmitted from the device, creates necessary regulation information, and transmits it to the subscriber line exchange and trunk line exchange via the interface control device; a traffic control system comprising: a first means for identifying that a trunk switch that sends the regional congestion information is a predetermined representative switch; and a first means for identifying the regional congestion information regarding the representative switch identified by the first means. The information and the subscriber congestion information regarding the subscriber line exchange are transferred to the regulation control device without applying any restrictions, and the regional congestion information regarding the trunk line exchanges other than the representative exchange is transmitted from the regulation control device to the overload information. A congestion information transfer method, characterized in that the interface control device is provided with a second means for applying restrictions according to a control instruction.