JPH0271653A - Subscriber congestion preventing system - Google Patents

Abstract

PURPOSE:To surely prevent number of subscriber congestion and to eliminate the need for connection restriction registration/release protocol by subscribers by registering and releasing a registered telephone number and a call setting number on a restriction registration list for each predetermined period by a registration release means. CONSTITUTION:When a subscriber 2-111 in an exchange 1-11 hooks off and a telephone number N311 of a subscriber 2-311 is selected, a restriction registration section 122 is started by a central controller 12. A registration section 122 references a restriction registration table 132 in the main storage device 13 and if the telephone number N311 is confirmed to be not registered, the telephone number N311 is transferred to an exchange 1-21 via a trunk 15 and a relay line 3-11, the normal connection processing is executed and the telephone number N311 is registered on the table 132. Exchanges 1-21-1-23, 1-31 apply similar processing and subscribers 2-111 and 2-311 start communication. When the subscriber 2-112 hooks off and selects the telephone number N311, the restriction registration section 122 is started and when the registration of the telephone number N311 is confirmed, the call setting request from the subscriber 2-112 to the subscriber 2-311 is restricted.

Description

[Detailed Description of the Invention] [Summary] Regarding a method for preventing subscriber congestion in a switching network consisting of a plurality of exchanges, there is no need for subscribers to register/cancel connection restrictions, and maintenance personnel can restrict connections and release restrictions. The purpose is to realize a method that does not require any operations and can reliably prevent the occurrence of congestion for subscribers. The control registration table that registers the number of call setup requests for which new call setup was requested and the telephone number indicating the destination of the call that has occurred are checked to see if they have been registered in the control registration table. If there is, the call setup is executed normally and the telephone number is registered in the regulation registration table. If the telephone number is already registered, the number of call setup requests corresponding to the telephone number is added.
The system is configured to include a regulation registration means for adding "1" and a registration canceling means for canceling the registration of the telephone number and the number of call setting requests registered in the regulation registration table at predetermined intervals.

[Industrial application field]

The present invention relates to a switching network, and particularly to a method for preventing subscriber congestion in a switching network composed of a plurality of exchanges.

For example, when a subscriber accommodated in a switching network is flooded with telephone applications for an event, calls are temporarily concentrated on the subscriber, and resources such as transactions that temporarily store call information become insufficient. There is a sudden increase in waiting processing, etc., which not only puts the subscriber in a congestion state (so-called planned subscriber congestion), but also has a negative impact on the connection completion rate of the entire exchange. It is necessary to carry out appropriate call control for the switching equipment, etc. (hereinafter collectively referred to as "terrestrial") that accommodates the subscriber.

[Prior Art] Fig. 4 is a diagram showing an example of a switching network to which the present invention is applied, Fig. 5 is a diagram showing an example of a conventional switching equipment, and Fig. 6 is a diagram showing an example of a conventional switching system. It is a figure which illustrates a process.

In Fig. 4, a plurality of exchanges l (
The individual exchanges are referred to as 1-11 to 1-31 (the same shall apply hereinafter), among which exchanges 1-11 to 14 and 1-31 are subscriber exchanges accommodating subscriber 2, and exchanges 1-21 to 1-23 are mvA3 'f; - The subscriber exchange has the configuration shown in FIG. is provided with a connection regulation registration table 131.

In FIGS. 4 and 5, for example, subscriber 2-111 accommodated in exchange 1-11 makes a call and subscriber 2-311 does not perform any restrictions.
1 phone number N, 11 is selected, subscriber 2-111
The central control unit (CC) 12 detects the call from the subscriber 2-111 via the subscriber circuit (SLC) 14 and calls the telephone number N1. selected by the subscriber 2-111. When received, the connection regulation unit 121 is activated.

The activated connection regulation unit 121 connects the main memory (MM) 1
Please refer to the connection regulation registration table 131 provided in Figure 6, step S1), and analyze whether the received phone number N311 is registered or not (step S2).
3. , is unregistered, the connection process is executed normally (step 33).

In this state, subscriber 2- accommodated in exchange 1-31
When planned subscriber congestion is expected to occur in 311,
Subscriber 2-311 notifies the operator of the switching network in advance, and the operator who receives the notification sends each subscriber exchange 1-1
1 to 1-14 and 1-31, subscriber 2-3
In order to restrict calls to 11, a maintenance person executes a predetermined restriction registration operation on each subscriber exchange 1-11 to 1-14 and 1-31, and
・In connection regulation registration table 131 in 13, subscriber 2-311
Registration display TH1 indicates the validity of the registration according to the phone numbers N and II, and restricts only the subscriber corresponding to the registered phone number N, or restricts subscribers other than the corresponding subscriber. Also registered are type information S indicating the type of call volume to be regulated, etc., and regulation amount R indicating the proportion of call volume to be regulated.

Thereafter, for example, subscriber 2-1 accommodated in exchange 1-11
12 makes a call and selects the telephone number N, .
C) When the central control unit (CC) 12 detected via 14 receives the telephone number N, 11 selected by the subscriber 2-112, it activates the connection restriction unit 121.

The activated connection regulation unit 121 connects the main memory (MM) 1
3, please refer to the connection regulation registration table 131 provided in FIG. 6, step S1), and the received telephone number Nff
In step S2), the phone number N35.l is analyzed to see if it has been registered. When it is confirmed that the subscriber 2-31 is registered, it executes connection restriction processing such as returning a voice message notifying that the subscriber 2-31 is under restriction according to the correspondingly registered restriction amount R (step S4).

When the congestion state of subscriber 2-311 eventually disappears,
Subscriber 2-311 notifies the operator of the switching network to that effect,
Upon receiving the notification, the operator will request that the maintenance personnel contact each subscriber exchange 1-11 to 1-14 and 1-31 to release the restriction on calls to subscriber 2-311. 11 to 1-14 and 1-31 are executed, and the main storage device (M
M) Delete the registered phone number N3, 1 of subscriber 2-31 from the connection restriction registration table 131 in 13, and correspondingly deregister the registered registration display TH1 type information S, restriction amount R, etc. .

[Problem to be solved by the invention]

As is clear from the above explanation, in a conventional switching network, subscribers 2-3 are expected to experience planned subscriber congestion.
11 requests the operator of the switching network in advance to register the connection regulation, and the maintenance person executes a predetermined registration process to join the connection regulation registration table 131 of each exchange 1-11 to 14 and 1-31. 2-311, and when the congestion condition disappears, the operator of the exchange network is requested to cancel the connection regulation registration, and the maintainer executes the specified registration cancellation process. - It is necessary to deregister subscriber 2-311 who is already registered in the connection regulation registration table 131 of 11 to 14 and 1-311, and the procedure by subscriber 2-311 is complicated, and all It requires a maintenance person to perform connection regulation registration and connection regulation registration cancellation operations on the subscriber exchange, and if the operation is performed at the wrong time, the desired connection regulation may not be achieved, or connection regulation may be performed more than necessary. could have occurred.

Additionally, in order to simplify procedures for subscribers and operations by maintenance personnel, there is also a system that automatically detects congestion occurring within the exchange network due to an increase in busy calls, etc., and executes the necessary connection restriction processing. Although attempts have been made, this is a post-processing process after the congestion state has been detected, so it cannot be used as a definitive preventive measure.

The present invention eliminates the need for connection restriction registration/cancellation procedures by subscribers, eliminates the need for connection restriction and restriction release operations by maintenance personnel, and realizes means that can reliably prevent congestion from occurring for subscribers. The purpose is to

[Means to solve the problem]

FIG. 1 is a diagram showing the principle of the present invention.

In FIG. 1, l is an exchange to which the present invention is applied.

100 is a regulation registration table provided in the exchange 1 according to the present invention.

200 is a regulation registration means provided in the exchange 1 according to the present invention.

300 is a deregistration means provided in the exchange 1 according to the present invention.

[Effect]

The regulation registration table 100 registers a telephone number N indicating the destination of a set call, and the number n of call setup requests for which a new call setup is requested for the telephone number N.

The restriction registration means 200 checks whether the telephone number N indicating the destination of the generated call has been registered in the restriction registration table 100,
If the telephone number N is not registered, the call setup is executed normally and the telephone number N is registered in the regulation registration table 100, and if the telephone number N is registered, the number of call setup requests n corresponding to the telephone number N is set to the number rlJ. Add.

The deregistration means 300 deregisters the telephone number N and the number of call setting requests n registered in the regulation registration table 100 at predetermined intervals.

Therefore, in each exchange that makes up the exchange network, the second and subsequent call setup requests that occur to the same destination within a predetermined cycle are automatically regulated, and planned subscriber congestion is automatically reduced. It is possible to prevent this in a reliable manner.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram showing an exchange according to an embodiment of the present invention, and FIG. 3 is a diagram illustrating the connection regulation process in FIG. 2. Note that the same reference numerals indicate the same objects throughout the figures. The target switching network is as shown in FIG.

In FIG. 2, a regulation registration table 132 is provided in the main memory (MM) 13 as the regulation registration table 100 in FIG. 1, and a central controller (CC) is provided as the regulation registration means 200 in FIG. A regulation registration section 122 is provided within the central control unit (CC) 12, and a registration cancellation section 123 is further provided within the central control unit (CC) 12 as the registration cancellation means 300 in FIG.

In FIGS. 2 to 4, when a call is not set up for subscriber 2-311 accommodated in exchange 1-31, In the regulatory registration table 132, subscriber 2-311
Phone number N, 11 is not registered.

In this state, subscriber 2- accommodated in exchange 1-11
111 makes a call and calls subscriber 2-311's phone number N8. When subscriber 2-1 is selected in exchange 1-11, subscriber 2-1
11 via the subscriber circuit (SLC) 14, the central control unit (CC) 12 sends a call to the telephone number N3.11 selected by the subscriber 2-111. Upon receiving , the regulation registration unit 12
Start 2.

The activated regulation registration unit 122 stores the main memory (MM) 1
Please refer to the Regulatory Registration Table 132 provided in Section 3.
Figure step 511), the received telephone number N1. In step 512), the phone number Ns is analyzed to see if it has been registered.
After confirming that r+ is unregistered, exchange 1-
The trunk line 3-11 leading to 21 is selectively captured and the trunk (T
RK) 15 and exchange 1-2 via trunk line 3-11.
1 and phone number N3. , transfer the network (NW)
In step 513, the telephone number N3° is registered in the regulation registration table 132. In step 514), the corresponding number of call setup requests n is set to "0".

In the exchange 1-21, the central control unit (CC) 12, which has detected the incoming call from the trunk line 3-11 via the trunk (TRK) 16, receives the telephone number N111 transferred from the exchange 1-11. Then, the regulation registration section 122 is activated.

The activated regulation registration unit 122 performs steps S11 to S14 similarly to the regulation registration unit 122 in the exchange 1-11.
, selects and captures the trunk line 3-13 leading to the exchange 1-23, transfers the telephone number N3□ to the exchange 1-23, executes normal connection processing (step 513), and transfers the telephone number N3. , to be registered in the regulatory registration table 132. Step 5
14), the corresponding number of call setup requests n is the side of rOJ.

In the exchange 1-23, the central control unit (CC) 12 detects the incoming call from the trunk line 3-13 via the trunk (TRK) 16 and calls the telephone number N3. transferred from the exchange 1-21. , the regulation registration unit 122 is activated.

The activated regulation registration unit 122 performs steps S11 to 314 similarly to the regulation registration unit 122 in the exchange 1-21.
, selects and captures the trunk line 3-31 leading to the exchange 1-31, transfers the telephone number N3□ to the exchange 1-31, executes normal connection processing (step 513), and transfers the telephone number N3□ to the exchange 1-31. Step 51: Registration in Regulatory Registration Table 132
4) The corresponding number of call setup requests n is the side of rOJ.

In the exchange 1-31, the central control unit (CC) 12 detects the incoming call from the trunk line 3-31 via the trunk (TRK) 16 and calls the telephone number N17. transferred from the exchange 1-23. When received, the regulation registration unit 122 is activated.

The activated regulation registration unit 122 performs steps Sll to S14 similarly to the regulation registration unit 122 in the exchange 1-23.
and executes normal connection processing for subscriber 2-311 (step 513), and registers telephone number N1,1 in the regulation registration table 132 (step 314), and the corresponding number of call setup requests n is "0". I will leave it to you.

As a result of the above, subscriber 2-111 and subscriber 2-all,
Exchanges 1-11, 1-21, 1-23 and 1-31.
Then, a call is started via trunk lines 3-11, 3-13, and 3-31.

In this state, subscriber 2- accommodated in exchange 1-11
112 calls subscriber 2-311's telephone number N5,1.
When subscriber 2-1 is selected in exchange 1-11, subscriber 2-
When the central control unit (CC) 12 detects the call of 111 via the subscriber circuit (SLC) 14 and receives the telephone number N311 selected by the subscriber 2-111, the regulation registration unit 1
22.

The activated regulation registration unit 122 stores the main memory (MM) 1
Referring to the regulation registration table 132 provided in 3, step 511) analyzes whether the received telephone number N311 is registered or not.Step 512), confirms that the telephone number N3□ is registered. , phone number N 311
The number of call setup requests registered corresponding to n (=rOJ
) is executed (for example, transmitting busy tone to subscriber 2-112) (step 515).
), phone number N1. Correspondingly, add the number "1" to the registered number of call setup requests n (=rOJ) to make it "1" (
step 516).

As a result of the above, subscriber 2-112 transfers the call from subscriber 2-112 to subscriber 2-112.
This means that the call setup request for 311 is regulated by the exchange 1-11.

Next, when subscriber 2-12 accommodated in exchange 1-12 makes a call and selects the telephone number Nff11 of subscriber 2-311, exchange 1-12 accepts the call from subscriber 2-12. When the central control unit (CC) 12 detected via the subscriber circuit (SLC) 14 receives the telephone number N 311 selected by the subscriber 2-12, it activates the regulation registration unit 122.

The activated regulation registration unit 122 is stored in the main memory (MM) 13 similarly to the regulation registration unit 122 in the exchange 1-11.
Please refer to the regulation registration table 132 provided in Step 511), and analyze whether the received telephone number NffI1 has been registered or not.Step 312)', Telephone number N
1. After confirming that it is unregistered, switch 1-21
It selects and captures the trunk line 3-21 leading to the switch 1-21, transfers the telephone numbers N and 11 to the exchange 1-21, executes normal connection processing (step 513), and registers the telephone number N3□ in the regulation registration table 132. In step 5t4), the number n of call setup requests corresponding to M is set to "0".

In the exchange 1-21, when the central control unit (CC) 12, which has detected the incoming call from the trunk line 3-21 via the trunk (TRK) 16, receives the telephone number Ns++ transferred from the exchange 1-12. , starts the regulation registration section 122.

The activated regulation registration unit 122, similar to the regulation registration unit 122 in the exchange 1-11, refers to the regulation registration table 132 provided in the main memory (MM) 13 (step 311), and inputs the received telephone number N8. ．． Analyzing whether or not the telephone number N 311 has been registered (Step 512), if it is confirmed that the telephone number N 311 has been registered, the number of call setup requests n(-rOJ) registered corresponding to the telephone number N□ is The corresponding connection restriction process (for example, sending a busy tone to subscriber 2-112) is executed (step 515), and the number of registered call setup requests n (=rOJ) corresponding to the telephone number NffIl is executed. Add “1” and set it as rlJ (
step 316).

As a result of the above, from subscriber 2-12 to subscriber 2-3 who is currently talking
This means that the call setup request to 11 is regulated by exchange 1-21.

Next, when subscriber 2-13 accommodated in exchange 1-13 makes a call and selects subscriber 2-311's telephone number N311, the same procedure as when subscriber 2-12 makes a call is made. , exchanges 1-13 and 1-22 each execute normal connection processing and connect to exchange 1-23, but exchange 1-2
3, the telephone numbers N, . . . have already been registered in the restriction registration table 132, so the connection restriction process is performed.

Next, when subscriber 2-14 accommodated in exchange 1-14 makes a call and selects the telephone number N3゜1 of subscriber 2-311, subscriber 2-14 receives the call from exchange 1-14. The central control unit (CC) 12 detecting the call via the subscriber circuit (SLC) 14 sends the telephone number N31. selected by the subscriber 2-14. When received, the regulation registration unit 122 is activated.

The activated regulation registration unit 122 is stored in the main memory (MM) 13 similarly to the regulation registration unit 122 in the exchange 1-11.
Refer to the regulation registration table 132 provided in Step 5ll) and enter the received telephone number N1. When it is confirmed that the telephone number N5Il is not registered, it selects and captures the trunk line 3-41 leading to the exchange 1-31, and transmits the telephone number N5Il to the exchange 1-31.
, 11 and executes normal connection processing (step 513). is registered in the regulation registration table 132 (type information/information 314), and the corresponding number of call setup requests n is set to rOJ.

In the exchange 1-31, the central control unit (CC) 12 detects the incoming call from the trunk line 3-41 via the trunk (TRK) 16, and calls the telephone number N transferred from the exchange 1-14. When received, the regulation registration unit 122 is activated.

The activated regulation registration unit 122 refers to the regulation registration table 132 provided in the main memory (MM) 13 similarly to the regulation registration unit 122 in the exchange 1-14 (step 5ll), and inputs the received telephone number N. , 1. In step 512), the telephone number N1. After confirming that it has been registered, the phone number N53. The connection regulation process (for example, sending a busy tone to the subscriber 2-112) corresponding to the number of call setup requests n (= rOJ) registered in response to the request is executed (step 515), and the process corresponds to the null telephone number. The number of call setup requests registered using n(
=rOJ) is added to make it "1" (step 816).

As a result of the above, from subscriber 2-14 to subscriber 2-3 who is currently talking
This means that the call setup request to 11 is regulated by the exchange 131.

Next, when subscriber 2-312 accommodated in exchange 1-31 makes a call and selects the telephone number N3□ of subscriber 2-311, exchange 1-31 receives the call from subscriber 2-312. When the central control unit (CC) 12 detects the telephone number N 311 selected by the subscriber 2-312 via the subscriber circuit (SLC) 14, the regulation registration unit 122
Start.

The activated regulation registration unit 122 stores the main memory (MM) 1
Please refer to the Regulatory Registration Table 132 provided in Section 3.
Figure Step 311), Analyze whether the received phone number N311 is registered or not.Step 312), Phone number N,
1. After confirming that it has been registered, the phone number N3
Number of call setup requests registered corresponding to □ n(-rl
J) corresponding to connection regulation processing (for example, subscriber 2-312
Message for notification of restrictions to “Currently subscriber 2-311
Calls are busy. Please wait a while and try again. ” (step 515), and adds the number rlJ to the number of registered call setup requests n (= “N)” corresponding to the telephone numbers N and 11 to obtain “2”.
” (step 316).

As a result of the above, subscriber 2-312 transfers the call from subscriber 2-312 to subscriber 2-312.
This means that the call setup request to 311 is regulated by exchange 1-31.

On the other hand, the deregistration unit 123 provided in the central control unit (CG) 12 of each exchange 1 sends the registration cancellation unit 123 to the main memory (M
M) Telephone number N registered in the regulation registration table 132 in 13
, and set the corresponding number of call setup requests n to "0".
Initialize to .

In such a state, for example, subscriber 2-312 makes a call again,
Subscriber 2-311's phone number N, 1. When selecting , in the exchange 1-31, the central control unit (CC) 12 detects the call from the subscriber 2-312 via the subscriber circuit (SLC) 14, and calls the telephone selected by the subscriber 2-312. Upon receiving the number N3.1, the regulation registration unit 122 is activated.

The activated regulation registration unit 122 executes steps 311 to 314 in the same manner as described above, executes normal connection processing for the subscriber 2-311 (step 513), and registers the telephone number N 311 in the regulation registration table 132. In step 314), the corresponding number of call setup requests n is set to "0".

Subscriber 2-311 is currently talking to subscriber 2-111, but there is a service that allows multiple incoming calls (for example, a main number service or a call waiting service).
If the service is granted, processing corresponding to this type of service will be executed.

As is clear from the above description (according to this embodiment, the subscriber 2-311 who is on the phone with the subscriber 2-111
-112.2-12.2-13.2-14 and 2-3
Even if call setup is requested from subscriber 12 at the same time, subscriber 2
- Switch 1-31 that accommodates 311 includes switch 1-3.
Switch 1 connected to subscriber 2-312 accommodated in Switch 1 and switch 1-31 via a direct trunk line 3-41.
Only the call setup request from the subscriber 2-14 accommodated in the exchange 2-14 is received, and the incoming calls from the other subscribers 2-12. -111-
21 and 1-23, and the occurrence of congestion is avoided.

Furthermore, after at least a predetermined period T has elapsed, each subscriber 2-
112.2-12.2-13.2-14 and 2-31
A call setup request from exchange 2 is sent to exchange 1- without being regulated.
Since incoming calls are allowed to subscriber 2-31, the service that allows multiple calls to be provided to subscriber 2-311 can be provided without any problem.

It should be noted that FIGS. 2 to 4 are only one embodiment of the present invention, and for example, the configuration of the switching network to which the present invention is applied is not limited to that shown in the figures, and there may be many different colors in one color. Although the following modifications are considered, the effects of the present invention remain unchanged in either case.

〔Effect of the invention〕

As described above, according to the present invention, in each of the exchanges constituting the exchange network, the second and subsequent call setup requests that occur to the same destination within a predetermined cycle are automatically regulated. Therefore, planned subscriber congestion can be automatically and reliably prevented.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a diagram showing an exchange according to an embodiment of the present invention, FIG. 3 is a diagram illustrating the connection regulation process in FIG. 2, and FIG. 4 is a diagram showing the invention FIG. 5 is a diagram showing an example of a conventional exchange, and FIG. 6 is a diagram illustrating the connection regulation process in FIG. 5. In the figure, 1 is an exchange, 2 is a subscriber, 3 is a trunk line, 1
1 is the network (NW), 12 is the central control unit (C
C), 13 is the main memory (MM), 14 is the subscriber circuit (
SLC), 15 and 16 are trunks (TRK),
100 is a regulation registration table, 121 is a connection regulation section, 122 is a regulation registration section, 123 is a registration cancellation section, 131 is a connection regulation registration table, 132 is a regulation registration table, 200 is a regulation registration means, 30
0 is Ryo Noborimoto's Principle Diagram No. 1 Lo Kanshu Dou Zhi Diagram

Claims (1)

[Claims] In a switching network consisting of a plurality of exchanges (1), each exchange (1) has a telephone number (N) indicating the destination of the set call, and a telephone number (N) indicating the destination of the set call. Regulation registration table (100) for registering the number of call setup requests (n) for which new call setup was requested.
Then, it is checked whether the telephone number (N) indicating the destination of the generated call has been registered in the regulation registration table (100), and if it is not registered, the call setting is executed normally and the regulation registration is performed. table(
100), and register the phone number (N) in
A regulation registration means (200) that adds a number "1" to the number of call setting requests (n) corresponding to the telephone number (N) if the telephone number (N) has been registered; and registration in the regulation registration table (100). The above phone number (
N) and a deregistration means (300) for deregistering the number of call setup requests (n) at predetermined intervals.