Exchange connection control system

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Industrial application field]

The present invention is used for intelligent networks. In particular, it relates to an overload suppression technique for a system control processor.

【0002】

[Conventional technology]

Call regulation in an intelligent network is to regulate calls related to services or virtual private networks in a system control processor (SCP) and perform overload control of the system control processor. In traditional call control schemes in intelligent networks, the system control processor sends a control signal to the service exchange point (SSP) only when it detects its own overload condition or destination-to-ground congestion. By sending, the call was discarded at the service exchange point, reducing the load on the intelligent network. For example, see Japanese Patent Application Laid-Open No. 61-210751.

【0003】

In this conventional call regulation method, it is possible to regulate all calls that intend to receive the service provided by the intelligent network or only the call that attempts to receive an incoming call to a specific ground by the service provided by the intelligent network.

【0004】

[Problems to be Solved by the Invention]

However, as the services provided by intelligent networks become more diverse and intelligent networks become involved in call connections within virtual private networks, the specific services or specific services that are subject to regulation and are causing overload. Fine-grained processing is required to eliminate only calls related to the private network used by the customer and continue this for other services or call connections to other customers. In the conventional intelligent network, it is not possible to specify the call restriction target in detail in this way.

【0005】

The present invention has been made in such a background, and by providing detailed call regulation targets, automatic regulation can be performed at an early stage for each specific service or for each customer who operates a specific virtual private network. The purpose is to provide an exchange connection control method that can minimize the impact on the service or other customers.

【0006】

[Means for solving problems]

The present invention provides an exchange connection control including a plurality of service exchange points for exchanging and connecting various services and / or virtual private networks with a subscriber terminal, and a system control processor for controlling the service exchange points via a communication network. It is a method.

【0007】

Here, a feature of the present invention is that the system control processor sets a means for measuring traffic for each of the service and / or the use of the virtual private network and / or the type correspondence of the private network, and a threshold value for each of the traffic. The service exchange point is provided with a means for setting and a means for transmitting a regulation signal to the service exchange point for traffic exceeding this threshold value, and the service exchange point is provided with a means for rejecting each request call according to the regulation signal. It's just around the corner.

【0008】

It is desirable that the traffic is the number of calls connected at the same time for the various services, and the incompletion rate of incoming and outgoing calls for the use of the virtual private network.

【0009】

It is desirable that the threshold value be set individually for the various services.

【0010】

It is desirable that the threshold value be set individually for the use of the virtual private network.

【0011】

It is desirable that the threshold value is adaptively changed and set according to the service standard.

【0012】

[Action]

Occurs for each service and / or virtual private network by collecting and counting the number of simultaneous connections of calls receiving a specific service on the system control processor and the incomplete rate of connected calls within a specific virtual private network. Automatically detects the overload condition.

【0013】

That is, when these values exceed a predetermined threshold value, it is determined that the resource related to the corresponding service or virtual private network has been placed in a congested state. As a result, the system control processor sends a regulated signal containing the identifier of the service or virtual private network that is regulated, and the service exchange point that receives this is regulated from among the calls that request intelligent network control. Isolates a call that attempts to activate a specific service, or a call that attempts to make or receive an incoming call within a specific regulated virtual private network, and rejects it.

【0014】

Early call regulation at such service exchange points can reduce the load on congested services or virtual private networks and minimize their impact on others.

【0015】

[Example]

The configuration of the embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a block configuration diagram of an apparatus according to an embodiment of the present invention. FIG. 2 is a conceptual diagram showing the overall configuration of an embodiment of the present invention.

【0016】

The present invention controls a plurality of service exchange points 11 for exchanging and connecting a subscriber terminal 10 with various services 30 and / or a virtual private network 40, and the service exchange points 11 as a communication network via a common line signal network 12. It is an exchange connection control system provided with a system control processor 13.

【0017】

Here, the feature of the present invention is that the system control processor 13 is a means for counting calls connected to one service A, B, ..., Z at the same time for each of the service 30, and a virtual private network. A service logic program 17 having a means for counting the incompletion rate of calls to and from one virtual private network a, b, ..., Z for each of the 40, and a counting result of the means for counting the calls. The means for setting the threshold value m to be compared with and the means for setting the threshold value n to be compared with the counting result of the means for counting the incomplete rate are provided, and the counting result of the means for counting the call exceeds the threshold value m. When and / or when the counting result of the means for counting the incomplete rate exceeds the threshold value n, the service A, B, ..., Z and / or the service A, B, ..., Z and / or which exceeds the threshold value m and / or the threshold value n at the service exchange point 11. The service exchange point 11 includes an overload detection program 18 provided with a means for sending a regulation signal 19 for rejecting calls to the virtual private networks a, b, ..., Z, and the service exchange point 11 has the threshold value m according to the regulation signal 19. It is equipped with detection software 15 with means for rejecting calls to services A, B, ..., Z and / or virtual private networks a, b, ..., Z that have exceeded the threshold n.

【0018】

Next, the operation of the embodiment of the present invention will be described. Whether or not the existing call processing program 14 in the service exchange point 11 activates the service 30 provided by the intelligent network and / or makes a call to / from the virtual private network 40. Judgment detection software 15 is built-in. Specifically, it is determined whether or not the intelligent network is involved in the connection processing of the call based on the number dialed by the subscriber or the service subscription information of the subscriber. As a result of the determination, when the intelligent network providing function is required, the system control processor 13 is notified by the activation request signal 16.

【0019】

On the other hand, the system control processor 13 has a service logic program 17, and when it receives a service start request signal from the service exchange point 11, it sends a call control instruction signal 20 to the service exchange point 11 based on this program. Provides an intelligent network.

【0020】

In the present invention, in the service logic program 17, the number of simultaneous connections of calls receiving the service for each service A, B, ..., Z and the virtual private network a, b, ..., z If the call is made or received within, the incompleteness rate is counted. This count value is synchronously inspected by the overload detection program 18 provided independently of the service logic program 17. As a result, when these values exceed the predetermined thresholds m and / or n, they identify specific services A, B, ..., Z and / or virtual private networks a, b, ..., z. A regulation signal 19 including a number and a regulation condition value (regulation time, regulation level) as parameters is sent to the service exchange point 11.

【0021】

At service exchange point 11, a call or a specific virtual private network a, which attempts to start a specific service A, B, ..., Z that has been regulated according to the conditions after registering this regulation content. The detection software 15 described above identifies the calls to be made and received in b, ..., and z, and discards these calls without sending a start request signal to the system control processor 13.

【0022】

Next, the overload detection procedure in the system control processor 13 will be described in more detail with reference to FIG. FIG. 3 is a flowchart showing the overload detection procedure. When a call arrives at the service logic program 17 (S1), it is determined whether the call uses the service 30 or the virtual private network 40 (S2). If the call is made to / from the virtual private network 40, the incomplete rate of the call made / received to the same virtual private network a, b, ..., Z is counted (S3). If the call arrives at service 30, the number of simultaneous connections of calls receiving the same services A, B, ..., Z is counted (S5). Each of these count values is transferred to the overload detection program 18. In the overload detection program 18, when the incomplete rate for virtual private networks a, b, ..., z exceeds the threshold n (S4), and / or simultaneous calls for services A, B, ..., Z When the number of connections exceeds the threshold value m (S6), a regulation signal 19 containing the regulation condition value (regulation time, regulation level) and the service identification number and / or the virtual private network number is sent to the service exchange point 11 as information. Send (S7). In response to this, the detection software 15 at the service exchange point 11 receives calls from the subscriber terminal 10 to the regulated services A, B, ..., Z and / or the virtual private network a, b, ... , Z is judged and the corresponding call is rejected.

【0023】

In the embodiment of the present invention, the values of the threshold values m and n have been described so as to set uniform values for the service 30 and the virtual private network 40, respectively, but the services A, B, ..., Z and the virtual private network a, b. , ..., z individually threshold m₁, M₂, ..., m_ZAnd threshold m₁, M₂, ..., m_zCan also be set. In addition, the threshold values m and n can be set in advance in consultation with the subscriber by contract.

【0024】

[Effect of the invention]

As described above, according to the present invention, by providing a detailed call regulation target, it is possible to perform automatic regulation at an early stage for each specific service or for each customer who operates a specific virtual private network. The impact on the service or other customers can be minimized and the quality of service for these can be improved.

[Simple explanation of drawings]

[Figure 1]

The block block diagram of the apparatus of this invention.

[Figure 2]

The conceptual diagram which shows the whole structure of the Example of this invention.

[Fig. 3]

A flowchart showing an overload detection procedure.

[Explanation of symbols]

10 Subscriber terminal 11 Service exchange points 12 Common line signal network 13 System control processor 14 Call processing program 15 Detection software 16 Start request signal 17 Service logical program 18 Overload detection program 19 Regulatory signal 20 Control instruction signal 30, A, B, ..., Z service 40, a, b, ..., z Virtual private network