KR20080026689A - Apparatus and method for call setup of intelligent network - Google Patents

Abstract

An apparatus and a method for processing a call of an intelligent network service are provided to reduce a service request failure rate by guaranteeing an intelligent network service by using a detour routing route. A soft switch(200) determines whether a received call is a call of an intelligent service, and if the received call is a call of an intelligent service, the soft switch(200) attempts connection to an SCP(Service Control Point) which controls the corresponding intelligent network service. If the connection to the SCP fails, the soft switch(200) obtains a detour route and re-requests the intelligent network service. A database(220) stores a number configuration table having information of an intelligent network service requested by a subscriber, an SCP information table having SCP information for a connection to the corresponding SCP, and a routing table having information for obtaining a detour route by setting a route for call processing.

Description

Apparatus and method for call processing of intelligent network service {APPARATUS AND METHOD FOR CALL SETUP OF INTELLIGENT NETWORK}

1 is an intelligent network configuration according to the prior art,

2 is a block diagram of an intelligent network service call processing apparatus in an intelligent network service according to an embodiment of the present invention;

3 is an example number configuration table according to an embodiment of the present invention;

4 is an example of an SCP information table according to an embodiment of the present invention,

5 is a routing table example according to an embodiment of the present invention,

6A is an intelligent network service flowchart when there is no failure of an intelligent network service request according to an embodiment of the present invention;

6B is a flowchart of an intelligent network service when there is a failure of an intelligent network service request according to an embodiment of the present invention;

7 is a flowchart illustrating an intelligent network service call processing according to an embodiment of the present invention.

The present invention relates to an apparatus and a method for controlling call processing of an intelligent network service. In particular, a soft switch (SSW) for controlling a call connection of an intelligent network service and a trunk gateway (Trunck GateWay: TGW) in charge of transmission between soft switches. The present invention relates to an apparatus and a method for reducing a failure rate of an intelligent network service by processing a call for an intelligent network service.

As the information society progresses, various functions are added to the communication network to provide new services. In general, a computer is used to control an exchange in order to provide additional services (such as speed dial, three-way call, etc.) for efficient use of telephone service, which is an electronic exchange. Since the exchange operates according to the software instruction, adding the necessary software can realize a new service. To do this, all the software of the relevant exchanges must be added or changed. To add a function to all the exchanges installed nationwide, a great work must be done.

However, at the exchange, separate the functions related to service control and install a dedicated computer, and then gather the functions related to new service control. Connecting to a switchboard and a dedicated computer with a common line signal network makes it easy to add or change software. Such a network is called an intelligent network (IN).

1 is a view showing the configuration of an intelligent network according to the prior art.

Referring to FIG. 1, the wired switching network for the intelligent network service has a hierarchical structure, and the local exchange (LOCAL EXCHANGE) 106, 108, 110, 112, TANDEM EXCHANGE, and long-distance exchange (TOLL EXCHANGE) 102, 104, and the like. Here, a service control point (SCP) 100, a service switching point (SSP), an advanced intelligent peripheral device (AIP), and the like are additionally connected to provide an intelligent network service. In FIG. 1, the tantem exchanger and the next-generation intelligent network adding device are omitted.

The role of the service control unit is played by the SCP (100), it is configured to perform a service switching role in the inter-city exchange (102, 104). In order to provide an intelligent network service at the local exchange, a service request is made to the intercity exchanges 102 and 104, and the intercity exchanges 102 and 104 request it to the SCP 100 again. Thereafter, the SCP 100 transmits a response message to the local exchange 102 or 104 by controlling the intercity exchange 102 or 104, AIP, etc. to provide the requested intelligent network service. The inter-city exchangers 102 and 104, which serve as service switching, store information on what intelligent network services they can handle and what SCPs can handle them in a database to utilize them when necessary. To provide.

When the service user A requests the intelligent network service (service provided by the service provider P1), the local exchange 1 (106) requests the service exchange back to the long distance switch 102, and the long distance switch (102) is the SCP (100). Will require a service start. However, at this time, if there is an error in path 1, the SCP can no longer provide services if it cannot connect.

Similarly, when the service user B requests the intelligent network service (service provided by the service provider P1), the local exchange 1 112 requests the service exchange back to the long distance exchange 104, and the long distance exchange 104 requests SCP ( 100) request to start the service. Since the service provider P1 providing the intelligent network service is connected to the local exchange 2 108, the SCP 100 establishes a link between the long distance exchange 2 104 and the long distance exchange 2 102 so that the local exchange 2 An intelligent network service provided by the service provider P1 of 108 is controlled.

In the prior art, the connection with the service switching unit (SCP) does not exist in the inter-city exchange entry that plays the role of the service switching unit (SSP) except the direct connection. Therefore, if there is an error in the set path or a problem of the service switching unit (SCP), if the service start request of the service switching unit (SSP) is not accepted, the processing of the corresponding intelligent network service is no longer performed and service provision fails. . If this problem occurs in a busy time, a situation can arise that can cause significant problems, depending on the operator's response.

Therefore, there is a need for an apparatus and method for reducing the intelligent network service request failure rate to guarantee the intelligent network service as much as possible.

Accordingly, an object of the present invention is to provide an apparatus and method for maximally guaranteeing an intelligent network service by reducing a service request failure rate in an intelligent network service.

Another object of the present invention is to provide an apparatus and method for guaranteeing an intelligent network service by using a bypass routing path to reduce a service request failure rate in an intelligent network service.

Another object of the present invention is to provide a call for an intelligent network service using a soft switch (SSW) for controlling the call connection of the intelligent network service and a trunk gateway (TGW) for the transmission between the softswitches to reduce the service request failure rate in the intelligent network service. The present invention provides an apparatus and method for processing.

In accordance with an aspect of the present invention, there is provided a device for call processing of an intelligent network service, the apparatus comprising: a service control point for determining whether a received call is a call of an intelligent network service, and controlling the corresponding intelligent network service if it is determined to be a call of the intelligent network service ( Attempting to connect with Service Control Point (SCP) and failing to connect with the SCP, acquires the bypass route and re-requests the intelligent network service, and a number configuration table with information of the intelligent network service requested by the subscriber , A SCP information table having SCP information for connecting to the corresponding SCP, and a database storing a routing table having information for obtaining a detour route by setting a path for call processing.

A method according to the present invention for achieving the above object, in the method for call processing of the intelligent network service, the process of determining whether the received call is an intelligent network call using a number configuration table having information of the intelligent network service requested by the subscriber And, if determined to be an intelligent network call, attempting to connect to a service control point (SCP) that controls the corresponding intelligent network service using an SCP information table having SCP information for connecting to the corresponding SCP; If this fails, the method may include obtaining a corresponding bypass path and re-requesting the intelligent network service by using a routing table having information for obtaining a bypass path as a path setting for call processing.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, an apparatus and method for providing a bypass and a default routing path for intelligent network service call processing using a soft switch and a trunk gateway in an intelligent network service will be described.

2 is a block diagram of an intelligent network service call processing apparatus in an intelligent network service according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the soft switch (SSW) 200 performs call connection control 201 and service control 202. That is, the call connection control 201 initiates an intelligent network service request to the SCP through the SCP address for any call, and in case of failure, reconnects the intelligent network service to the bypass routing path by referring to the bypass routing path information from the database 220. request. The service control 202 determines whether an intelligent network service is applied to any generated call and reads out corresponding SCP information from the database 220.

The database 220 stores the number configuration table 221, the SCP information table 222, and the routing information table 223 to provide information of the service requested by the subscriber and to process the service requested by the subscriber. Provide SCP information that exists, and route information if call processing is to be done with other softswitches or other intercity exchanges.

The trunk gateway (TGW) 210 transfers call connection control and bearer data between networks under the control of the soft switch.

3 is a diagram illustrating an example number configuration table according to an embodiment of the present invention.

Referring to FIG. 3, the number configuration table is information configured to analyze information on a service requested by a subscriber in a wired network, and also includes number information on an intelligent network service request.

4 is a diagram illustrating an example SCP information table according to an embodiment of the present invention.

Referring to FIG. 4, the SCP information table is a table that stores information of the corresponding SCP in order to make a service start request to the SCP that can process the service requested by the subscriber.

5 is a diagram illustrating an example of a routing table according to an embodiment of the present invention.

Referring to FIG. 5, the routing table is a table that contains information on how a network is configured when a call processing is to be performed by another soft switch or another long-distance exchanger, and through which path.

6A illustrates an intelligent network service flowchart when there is no failure of an intelligent network service request according to an exemplary embodiment of the present invention.

Referring to FIG. 6A, the call processing process of the SSW 602 translates the called number first to the intelligent network service of the service provider P1 requested by the service user A under the control of the local exchange 1 (608). Find and analyze the information of the intelligent network service requested by the service user A. For example, if the service user A presses 113 to listen to the “weather forecast” announcement, the SSW1 602 uses a number configuration table for 113 (the number configuration table of FIG. 3 corresponds to 113). Assuming the number configuration table), we analyze the intelligent network service requested by the service user. The PFX value in the number configuration table of FIG. 3 represents a number or index representing the intelligent network. That is, 113 corresponds to the PFX.

In addition, the number configuration table of FIG. 3 includes an index (SKEY) of the SCP information table, so that the corresponding SCP information table can be found. An attempt to initiate an intelligent network service is initiated to SCP (600) using the SCP address from the SCP information table. The SCP address is composed of a PC (point code) and an SSN (SubSystem Number). When the SCP address is mapped with the route 1, in this case, when the route 1 is in a normal state, the SCP address is communicated with the SCP 600, and the SCP 600 connects the service provider P1 through a predetermined logic. SSW).

6B is a diagram illustrating an intelligent network configuration in which an intelligent network service request failure according to an embodiment of the present invention.

Referring to FIG. 6B, when path 1 fails in FIG. 6A, when the SCP is no longer connected through path 1, the soft switch uses RTE_LIST information in the number configuration table information. The RTE_LIST information is generally used to find the next destination route by translating the number when a call processing request is received.

If a failure occurs in the path 1 and the primary intelligent network service start request fails, the service request is re-requested using the path 2 using the given RTE_LIST information without failing the subscriber service request. The routing information table can be found by referring to the RTE_LIST information, and the RTE information connecting SSW1 and SSW2 can be found by referring to the routing information table. By using this, the intelligent network service request is transmitted to SSW2 to request a secondary intelligent network service initiation request. To make it happen. The RTE refers to a path transmitted from a source to a destination, and the RTE_LIST is a number of bundles of several RTEs.

For example, if a failure occurs in the path 1, the SSW1 finds a corresponding routing table by referring to the RTE_LIST value 20 of the number configuration table (Fig. 3). Here, RTE_LIST 20 is a numbered number of paths from SSW1 to SSW2. Assuming that the routing table corresponding to the RTE_LIST 20 is the routing table shown in FIG. 5, there are path information DR 20, AR 10, and AR 30 from the SSW1 to SSW2 in the routing table. DR 20 is a direct path from SSW1 to SSW2 through TGW0, AR 10 is a bypass path from SSW1 to SSW2 through TGW1, and AR 30 is a bypass path from SSW1 to SSW2 through TGW2 . Depending on the network configuration, the paths from SSW1 to SSW2 may be more complex and have many paths. In FIG. 6B, it is assumed that there are only DR 20, AR 10, and AR 30 3 paths from SSW1 to SSW2.

Therefore, if a failure occurs in path 1, SSW1 re-requests the intelligent network service through the bypass path of DR 20 or AR 10 or AR 30.

7 is a flowchart illustrating an intelligent network service call processing according to an embodiment of the present invention.

Referring to FIG. 7, when an intelligent network service call is generated from the user in step 701, the process proceeds to step 703. The soft switch determines whether the intelligent network service is translated by the called number using the number configuration table.

If an intelligent network service is required in step 703, the process proceeds to step 705. The soft switch determines whether SCP connection is possible. Here, SCP connection to receive necessary control information from SCP in charge of intelligent network service control finds SCP information table by referring to index of SCP table in the corresponding number configuration table and uses SCP address contained in SCP information table. Try to connect. In other words, after the intelligent network service logic is initiated, it is to make a service initiation request to SCP, which is the actual intelligent network service control entity.

If the SCP connection is possible in step 705, the process proceeds to step 707 to request the intelligent network service to be initiated by the SCP. The call processing to each switch in the telephone exchange network consists of trunk / root / rootlist / special route processing. When a call is handled by a general telephone exchange, Obtain a root list (or special root list) to find the route and use it to find the trunk and request SCP service to start.

Thereafter, the process proceeds to step 709, when receiving a response message for the intelligent network service request from the SCP to start the service provided by the SCP control.

If the SCP connection is not possible in step 705, it is checked in step 611 whether a bypass path connection for the intelligent network service is possible. If the direct connection with the SCP fails, the routing table information is used to find a bypass path to the SCP.

If the bypass path connection is possible in step 711, the flow proceeds to step 713 to use the RTE information. The RTE information refers to the detour path information, and when the direct connection with the SCP is impossible, the RTE information attempts to connect with the SCP using another soft switch as a next best option.

Thereafter, the process proceeds to step 715 to provide a service using another SSW.

If it is impossible to connect the bypass path in step 711, the process ends.

The algorithm of the present invention is then terminated.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

The best-effort intelligent network service can be reduced by providing a bypass route between SSP and SCP by using a softswitch that controls the call connection of the intelligent network service and a trunk gateway that handles the transmission between the softswitches. There is an advantage that can be provided.

Claims (10)

An apparatus for call processing of an intelligent network service, If it is determined that the received call is a call of an intelligent network service, if it is determined to be a call of the intelligent network service, it attempts to connect with a service control point (SCP) that controls the corresponding intelligent network service.If the connection with the SCP fails, the corresponding bypass path is determined. A soft switch for acquiring and re-requesting the intelligent network service; Number configuration table with information of intelligent network service requested by subscriber, SCP information table with SCP information to connect with the corresponding SCP, routing table with information for obtaining bypass route by setting route for call processing Call processing apparatus comprising a database for storing the. The method of claim 1, And a trunk gateway for mutually transferring call and bearer data between the network and the network according to the control of the soft switch. The method of claim 2, And a physical bypass path is formed by the trunk gateway. The method of claim 1, And the number configuration table includes an index value that can refer to the routing table when a corresponding SCP connection fails. The method of claim 1, And the number configuration table includes an index value that can refer to the SCP information table when the received call is determined to be an intelligent network call. In the method for call processing of an intelligent network service, Determining whether the received call is an intelligent network call using a number configuration table containing information of the intelligent network service requested by the subscriber; If it is determined to be an intelligent network call, attempting to connect to a Service Control Point (SCP) that controls the corresponding intelligent network service using an SCP information table that has SCP information for connecting to the corresponding SCP; If the connection with the SCP fails, acquiring the bypass path and re-requesting the intelligent network service by using a routing table having information for obtaining the bypass path as a path setting for call processing; Call processing method. The method of claim 6, And transmitting the call and bearer data between the network and the network according to the control of the soft switch. The method of claim 7, wherein And a physical bypass path is formed by the trunk gateway. The method of claim 6, And the number configuration table includes an index value that can refer to the routing table when a corresponding SCP connection fails. The method of claim 6, And wherein the number configuration table includes an index value that can refer to the SCP information table when the received call is determined to be an intelligent network call.

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