KR20020021235A - Information Search Method Between Network Element In Wireless Intelligent Network - Google Patents

Abstract

PURPOSE: A method for retrieving information between network elements in a mobile intelligent network is provided to obtain information corresponding to a specific condition associated with intelligent network call process by providing a retrieval operation including the specific condition for obtaining necessary information during an intelligent network service logic procedure. CONSTITUTION: If a termination SSP(Service Switching Point,24) is different from an origination SSP(21), a routing request message is transmitted to the termination SSP(24) for receiving a TLDN(Temporary Local Directory Number,S26). The termination SSP(24) assigns the TLDN for setting a routing with the origination SSP(21) and returns a routing response message to an HLR(Home Location Register,22,S27). The HLR(22) includes the TLDN received from the termination SSP(24) in a service data access element list parameter and transmits the service data access element list parameter to an SCP(Service Control Point,23,S28). The SCP(23) includes the TLDN received from the HLR(22) in a terminal list parameter of an analysis response message and returns the terminal list parameter of the analysis response message to the origination SSP(21,S29). The SSP(21) converts a call into a VMS(Voice Message System,25) of a termination-side mobile subscriber through the termination SSP(24,S30,S31) for providing a call conversation service to the VMS(25).

Description

Information Search Method Between Network Element In Wireless Intelligent Network}

The present invention relates to a method for retrieving information between network elements in a mobile intelligent network, and more particularly, to provide a retrieval operation including a specific condition to obtain necessary information during execution of an intelligent network service logic in which various results can be returned according to a condition. A method for retrieving information between network elements in an intelligent network.

In general, network elements of a mobile intelligent network include a service control point (SCP) having service control logic at the network level, a service management system (SMS) that manages data required for service provision, There are Service Switching Point (SSP) that adds the function to connect existing SCP to existing exchange and Home Location Register (HLR) that manages subscriber information. In order to provide intelligent network services to subscribers, it was necessary to retrieve the necessary information between network elements.

That is, when the network element side that needs the predetermined information is transmitted to another network element side, the network element side that receives the information is composed and returned as a list, thereby providing necessary information from the other network element side. I could get it.

At this time, the search operation provided for retrieving information between network elements in the mobile intelligent network environment provides a mechanism for supporting the distribution of service logic and service data between different network elements, and additional services during service logic execution. When information is needed, it is used to request information stored in the service data function (SDF) of another network element by the service control function (SCF) of the network element.

The search operation is initialized with the Transaction Capabilities Application Part (TCAP) Invoke and transmitted by the TCAP query approval package. The parameter set includes the identifier field and the length of the search invoke parameter. Field and a content field having a database key and a list of service data access elements. The parameter value to be interpreted as a corresponding database key is determined by negotiation between the sender and the receiver network elements. The Mobile Directory Number (MDN) is included in the database key, and the service data access element list includes only an identifier (DataID) for the required information, and does not include a specific condition for retrieving the required information according to the condition.

On the other hand, the result return for the search operation is returned by the TCAP result package, wherein the parameter set is composed of an identifier field for the search return result parameter and a content field having a length field and a service data access element list. The data access element list contains only data values for the required information.

Therefore, in the related art, a list of information required between network elements is transferred, and as a result, only a real data value corresponding to the required information is retrieved from the database and returned, and various results are returned according to a condition to change the required information. Although it is possible, there is a problem in that the provision of the intelligent network service is restricted because it is not defined in the mobile intelligent network standard (IS-771).

For example, a call processing procedure using a conventional information search operation between network elements will be described with reference to FIG. 1 as follows.

First, when the originating SSP 11 receives the call origination of the mobile terminal and the dialed MS (Mobile Station) digit (step S11), the trigger of the mobile terminal is detected and the location request message (LOCREQ [DGTSDIAL]) is HLR. The data is sent to step 12 (step S12).

Accordingly, the HLR 12 determines whether the calling mobile subscriber has activated ICS (Incoming Call Screening) on the SCP 13 and transmits a service request message (SERVREQ [SRVID, DGTSDIAL]) to the SCP 13. (Step S13) In this case, the service identifier (SRVID) parameter included in the service request message indicates which service is to be processed and transmits it.

Then, the SCP 13 performs the screen function, and the result is included in the service response message (servreq [ACCDEN]) to be returned to the HLR 12 (step S14), at which time a voice mailbox (VMS: Voice) If the call cannot be processed, such as a call transfer request to a message system), the reason is included in the ACCDEN parameter and returned to the HLR 12.

Then, the HLR 12 includes the denial of service parameter included in the service response message received from SCP 13 in the location response message locreq [ACCDEN] and returns it to the originating MSC 11 (step S15). Therefore, the corresponding MSC 11 does not provide call transfer service to the VMS for the intelligent network subscriber by performing call rejection processing including the subscriber announcement broadcast (step S16).

That is, in the conventional mobile intelligent network, the call transfer to another number is defined while performing the logic of the intelligent network service in SCP 13, which is a network element, but the call transfer to the VMS is not defined. As a result of disconnection without switching or disconnection of calls with announcements, the service quality of the intelligent network is lower than that of the non-intelligent network, which causes a problem for both the subscriber and the service provider.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a method for retrieving information between network elements including a specific condition so as to obtain necessary information according to a condition while performing intelligent network service logic in a mobile intelligent network. It is to provide a variety of intelligent network services by obtaining information that meets specific conditions regarding call processing.

1 is a diagram illustrating a call processing procedure using an information retrieval operation between network elements in a conventional mobile intelligent network.

2 is a diagram illustrating a processing procedure when a call is transferred to a VMS using an information retrieval operation between network elements in a mobile intelligent network according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

21: Outgoing SSP 22: HLR

23: SCP 24: incoming SSP

25: VMS

A feature of the present invention for achieving the above object is, in a method for retrieving information between network elements in a mobile intelligent network, an optional parameter for the specific condition to obtain information that meets a specific condition during execution of the intelligent network service logic. The present invention provides a method for retrieving information between network elements in a mobile intelligent network, comprising performing a retrieval operation between network elements by including a change parameter and a data value in a reference data access element list of a search invoke parameter.

Herein, when the change parameter does not exist, the current value of information satisfying a specific condition is a data value, and when the change parameter exists, the data value has a value to be replaced as a data value. do.

Another feature of the present invention includes the steps of checking in the SCP whether the trigger required for intelligent network call processing by the originating SSP requires VMS related information; When the trigger requires VMS related information, including a reference data access element list having an identifier of the originating SSP in a search message and transmitting the same to the HLR; Finding an incoming SSP to which the VMS of the called-party mobile subscriber is connected in the HLR, and then checking whether the called SSP and the originating SSP are the same; Transmitting a routing request message including a VMS box number of a called party's mobile subscriber and a corresponding VMS identifier to the called SSP when the called SSP and the calling SSP are different from each other; Returning a routing response message to the HLR by allocating a corresponding TLDN to establish a routing with the originating SSP in the called SSP; Information between network elements in a mobile intelligent network comprising the step of returning information including the TLDN allocated from the terminating SSP to the originating SSP through the SCP to switch the intelligent network call to the VMS of the terminating mobile subscriber through the terminating SSP. To provide a search method.

At this time, when the called SSP and the calling SSP are the same, the information network including the VMS box number of the called mobile terminal and the corresponding VMS identifier stored in the HLR is returned to the calling SSP through the SCP to the intelligent network to the called mobile VMS. It characterized in that it further comprises the step of switching the call.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the mobile intelligent network according to the present invention, in the information search function between network elements, when performing a search operation to obtain necessary information while performing service logic, a change parameter and data value corresponding to a specific condition may be searched to search for necessary information according to a condition. By including it in the reference data access element list of the search invoke parameter and transmitting it to another network element, it is possible to search for information matching a specific condition between network elements. The search invoke parameter set for this is shown in Table 1 below.

field value Remarks Identifier SET [NATIONAL 18] Required parameter Length Variable octets Required parameter Contents Database key (DataKey) Required parameter Reference Data Access Element List (ReferenceDataAccessElementList) Optional parameters Service Data Access Element List (ServiceDataAccessElementList) Required parameter

That is, the search invoke parameter set according to the present invention is composed of a search invoke parameter identifier field, a length field, and a content field having a database key, a reference data access element list, and a service data access element list. The parameter value to be determined is determined by negotiation between sender and receiver network elements, and includes MIN (Mobile Identification Number) or MDN (Mobile DirectoryNumber) in the database key. In the search that can be returned, it contains a list of the specific conditions that apply so that any result can be retrieved according to the condition to obtain the required information, and the corresponding service data access element list contains only the identifier (DataID) for the required information. do.

The result return for the corresponding search operation is delivered by the TCAP result package. At this time, the parameter set includes a search return result parameter identifier field and a content field having a length field and a service data access element list.

Meanwhile, the parameter set of the reference data access element list included in the corresponding search invoke parameter will be described in more detail. As shown in Table 2 below, the reference data access element list parameter identifier field, the length field, and specific conditions for necessary information are described. It consists of a content field with a plurality of service data access elements, including.

field value Remarks Identifier ReferenceDataAccessElementListIMPLICIT SEQUENCE OF Required parameter Length Variable octets Required parameter Contents Service Data Access Element (ServiceDataAccessElement) Required parameter Service Data Access Element (ServiceDataAccessElement) Optional parameters … …

Here, the tag of the reference data access element list parameter identifier may be represented as '101111111', '100000010', '000100001', etc., and a specific condition for obtaining information necessary for a specific intelligent network service in the corresponding service data access element parameter Optional parameters for change parameters and data value parameters may be included, and the maximum number of service data access elements is determined by the two network elements involved in the transaction.

If the change parameter does not exist, the content field of the data access element included in the service data access element parameter has a current value of information corresponding to a specific condition as a data value, and if the change parameter exists, the specific condition The data to be replaced with the value corresponding to the information.

On the other hand, in the mobile intelligent network according to an embodiment of the present invention will be described in detail with reference to Figure 2 attached to the process of the call transfer to the VMS using the information retrieval operation between network elements as follows.

First, when the originating SSP 21 receives the call origination of the mobile terminal and the dialed MS (Mobile Station) digit (step S21), the originating SSP 21 detects the trigger of the mobile terminal and sends a location request message (LOCREQ). [DGTSDIAL, TRANSNSCAP, TRIGTYPE, WINCAP]) is transmitted to the HLR 22 (step S22).

Accordingly, when the HLR 22 returns the location response message (locreq [TRIGADDRLIST]) including the trigger address list parameter indicating the mobile terminal and the location trigger to the originating SSP 21 (step S23), the originating SSP ( 21) detects the mobile terminal trigger and sends an analysis message (ANLYZD [DGTSDIAL, CNIdigitsBCD, TRIGTYPE]) to request the intelligent network call processing associated with the detected trigger with SCP 23 assigned to the trigger address list parameter of the location response message. In this case (step S24), which trigger is detected in the corresponding trigger type parameter (TRIGTYPE).

Then, the corresponding SCP 23 detects a trigger detected during processing of the intelligent network service, that is, a search message (SEARCH [SDAEL, when the trigger required for intelligent network call processing by the originating SSP 21 requires the VMS related information). DATAKEY, RDAEL]) is transmitted to the HLR 22 (step S25), in which a reference data access element list (RDAEL) parameter is included to convey an identifier of the originating SSP 21 to which the calling mobile subscriber is connected. Will be sent.

After receiving the search message including the reference data access element list parameter, the HLR 22 finds the SSP 24 (hereinafter referred to as the called SSP) to which the VMS 25 of the called mobile subscriber is connected. The incoming SSP 24 and the originating SSP 21 are confirmed to be the same.

At this time, when the called SSP 24 and the calling SSP 21 are the same, information including the VMS box number of the called party's mobile subscriber stored in the HLR 22 and the corresponding VMS identifier is transmitted through the SCP 23 through the calling SSP ( 21), the intelligent network call can be transferred to the VMS of the called party's mobile subscriber.

However, if the destination SSP 24 and the originating SSP 21 are different, a routing request message (ROUTREW [MSID, TERMTRMT, DGTSDEST, VMBOX, VMSPIN) is sent to the destination SSP 24 in order to be assigned a TLDN (Temporary Local Directory Number). In step S26, the VMS box number of the called party's mobile subscriber and the corresponding VMS identifier are included in the routing request message.

Therefore, when the incoming SSP 24 allocates a TLDN to set up routing with the originating SSP 21 and returns a routing response message (routreq [TLDN]) to the HLR 22 (step S27), the corresponding HLR 22 The TLDN assigned from the destination SSP 24 is included in the service data access element list SDEAL parameter, which is the destination digit of the search response message search [SDAEL], and transmitted to the SCP 23 (step S28).

Then, the SCP 23 includes the TLDN received from the HLR 22 in the terminal list parameter of the analysis response message (anlyzd [TERMLIST]) and returns it to the originating SSP 21 (step S29). Accordingly, the originating SSP 21 switches the call to the VMS 25 of the called party's mobile subscriber via the called SSP 24 (steps S30 and S31), so that the mobile intelligent network to the VMS 25 for the mobile subscriber. It is possible to provide call transfer service.

In addition, the embodiments according to the present invention are not limited to the above-described embodiments, and various alternatives, modifications, and changes can be made within the scope apparent to those skilled in the art.

As described above, the present invention provides a method for retrieving information between network elements including a specific condition so as to obtain necessary information according to a condition while performing intelligent network service logic in a mobile intelligent network, thereby satisfying a specific condition with respect to intelligent network call processing. It is possible to obtain, thereby providing a more diverse intelligent network services.

Claims (4)

A method for retrieving information between network elements in a mobile intelligent network, Perform information retrieval operation between network elements by including change parameters and data values, which are optional parameters for the specific conditions, in the reference data access element list of search invoke parameters so that information that meets a specific condition can be obtained while performing the intelligent network service logic. A method for retrieving information between network elements in a mobile intelligent network. The method of claim 1, A movement having a current value of information satisfying a specific condition as a data value when the change parameter does not exist and having a value to be replaced as a data value when the change parameter exists A method for retrieving information between network elements in an intelligent network. Checking in the SCP whether the trigger required for intelligent network call processing by the originating SSP requires VMS related information; When the trigger needs VMS related information, including a reference data access element list having an identifier of the originating SSP in a search message and transmitting the same to the HLR; Finding an incoming SSP to which the VMS of the called-party mobile subscriber is connected in the HLR, and then checking whether the called SSP and the originating SSP are the same; Transmitting a routing request message including a VMS box number of a called party's mobile subscriber and a corresponding VMS identifier to the called SSP when the called SSP and the calling SSP are different from each other; Returning a routing response message to the HLR by allocating a corresponding TLDN to establish a routing with the originating SSP in the called SSP; In the mobile intelligent network comprising the step of returning the information including the TLDN assigned from the terminating SSP to the originating SSP through the SCP to the VMS of the destination mobile subscriber through the terminating SSP in the HLR How to retrieve information between network elements. The method of claim 3, wherein If the called SSP and the originating SSP are the same, information including the VMS box number of the called mobile subscriber and the corresponding VMS identifier stored in the HLR is returned to the calling SSP through the SCP to send an intelligent network call to the called mobile VMS. Method for retrieving information between network elements in a mobile intelligent network, further comprising the step of switching.