KR100836476B1 - Methods for performing call process according to an origination call type - Google Patents

Abstract

A method for performing call processing according to an origination call type is provided to previously check an NPDB(Number Portability Database) before requesting a call connection to a terminating MSC(Mobile Switching Center) in case of a video call to check whether or not a destination terminal supports the voice call. When there is a voice call origination request from an origination terminal(10)(S302), an RNC(Radio Network Controller)(20) receives the request and transmits it to an originating MSC(30)(S304). The originating MSC analyzes a setup message of an origination call received from the RNC, and if the origination call is a video call, the originating MSC requests an NPDB(50) to check whether or not a reception terminal is subjected to number portability(S306). The NPDB checks a routing number of a mobile communication provider to which the destination terminal has been currently subscribed and transmits the checked routing number information to the originating MSC(S308). The originating MSC transmits routing information to a GMSC(40)(S310). The GMSC requests a call setup to a terminating MSC of a provider to which the reception terminal has been subscribed by using the routing information(S312).

Description

Method for performing call process according to origination type {Methods for Performing Call Process According to an Origination Call Type}

1 illustrates a process of processing a call from an originating terminal through a query on release (QoR) scheme.

2 illustrates a process of processing a call from an originating terminal through an ACQ (All Call Query) method.

3 is a flowchart illustrating a process of processing a video call requested by a calling terminal according to an embodiment of the present invention when the called terminal is a number-shifted terminal.

4 is a flowchart illustrating a process of processing a voice call requested by a calling terminal according to an embodiment of the present invention when the called terminal is a number-shifted terminal.

The present invention relates to a method for performing call processing according to an originating call type. More particularly, the present invention relates to a call processing method according to a call result. It is an invention configured to perform the method.

Mobile Number Portability (MNP) technology means that a subscriber of a mobile terminal receives a service by changing a mobile communication service provider while maintaining a number used by the subscriber. Through this number portability, the subscriber of the mobile terminal whose service provider is changed (number mobile subscriber) can be provided with additional services such as an outgoing call, an incoming call, and an SMS while maintaining the existing phone number.

On the other hand, with respect to number portability, when receiving an outgoing signal from the mobile terminal, there are two methods of performing incoming / routing processing of a call as described below with reference to FIGS. 1 and 2. same.

1 illustrates a process of processing a call from an originating terminal through a query on release (hereinafter referred to as "QoR") method.

As shown in FIG. 1, in the QoR scheme, when there is an outgoing call request from the originating terminal 100 (S1), the originating exchange 200 receives this to determine whether the called party's number is ported. Number Portability DataBase; Sending routing information (SRI; Send Routing Info) to the Home Location Register 1 (HLR1) 400, which had jurisdiction over the recipient's original mobile terminal before the number transfer, before querying 300). Together, the location of the called party is queried (S2).

Here, the NPDB (300) provided by each mobile communication service provider manages routing information of the network (final destination network) to which the own network / other network subscribers have moved the number, and the home location register 1 (HLR1) 400 is the other network. Manage the mobile network subscriber information.

Signal that the caller does not exist in the database of the HLR1 (400) by receiving the number portability information of the subscriber from the NPDB 300 through the number portability query (NP Query) (SRI Ack) When receiving (S3), the originating exchange 200 inquires whether the called party has ported the number (S4), and receives the mobile communication provider information (for example, routing number) to which the called party is currently subscribed (S5).

Then, according to the received information, the called party transmits and processes the outgoing signal together with the transmission of the routing information (SRI) to the home location register 2 (HLR2) 500 of the mobile communication provider to which the called party is currently subscribed (S6).

As such, when the call request is received, the QoR scheme transmits the prefix to the HLR of the carrier corresponding to the prefix of the called party number (for example, 011-, 016-, 019-, etc.) of the called party number, and the called party is a number ported subscriber. In this case, the sender sends the call back to the current carrier's HLR.

Therefore, the QoR scheme has a disadvantage in that a call connection with the called party occurs when the called party moves the number, but does not affect the call to the called party who does not move the number. In view of these features, the QoR scheme is preferably implemented when the number of number mobile subscribers is small.

With regard to number portability, another way of handling outgoing calls is shown in FIG. 2 illustrates a process of processing a call from an originating terminal through an ACQ (All Call Query) method.

As shown in FIG. 2, the ACQ method is a method of performing call processing by first performing a number portability query on the NPDB before an incoming call in an originating network or a relay network. That is, if there is an outgoing call request from the originating terminal 100 (S11), the originating exchanger 200 receives it and inquires whether the called party's number ported to the NPDB 300 (S12), and the NPDB 300 to the called party. When receiving the number portability and the currently subscribed carrier information (S13), according to the received information, along with the transmission of the routing information (SRI), the receiver is sent to the HLR2 (500) of the mobile communication provider that is currently subscribed to processing. (S14).

As such, in the ACQ method, when an outgoing call request is received, the user of the called terminal does not transmit the prefix to the called party's prefix (eg, 011-, 016-, 019-, etc.) of the called party number. First, it checks whether the subscriber is a number porter and transmits the information to the HLR of the telecommunication company.

Therefore, the ACQ method should be configured to be able to query the NPDB (300) even for all the recipients that do not move the number, which is a disadvantage that consumes a lot of effort and investment in the initial construction of the NPDB (300), The time required for processing can be shortened. In view of this feature, the ACQ scheme is preferably implemented when the number of mobile subscribers is relatively large.

On the other hand, not all carriers support videophone services, so if a subscriber who was provided with a videophone service changed to a mobile carrier that does not provide videophone service, the previous videophone service could no longer be provided. do. Accordingly, as the number transfer between the 2nd generation and the 3rd generation is promoted as a policy, problems for videophone processing may occur.

For example, according to the number transfer between the second generation communication and the third generation communication, a procedure for checking whether the second generation communication subscriber or the third generation communication subscriber is required for the same number even in the same operator. That is, it is necessary to manage whether the second generation subscriber who cannot make a video call or the third generation subscriber who can make a video call to the same station number.

If the called subscriber does not support the video call when the video call is sent, the information "Bearer Not Capability" should be transmitted to the calling party. Then, the calling party automatically converts the voice call and proceeds with the call (Fallback function). However, in the situation where the protocol for the non-operational video call support message is not standardized, even though the called terminal does not support the video call, there may be a problem that the calling party continuously attempts the video call. On the called side, a buzz may occur because the protocol is not correct.

In order to solve this problem, the above-described ACQ method can be used. By using ACQ method, all the numbers can be checked by NPDB to check whether they are 2nd or 3rd generation subscribers, 1st party or 3rd party subscribers and proceed with the call before proceeding.

However, if the number porting rate is low, promoting the ACQ method from the mobile operator's point of view is another problem that additional investment costs are incurred by inquiring NPDB for all the non-numbered calls.

In order to solve the above problems, the present invention provides a call processing method for determining whether a call signal requested by a calling terminal is a voice call or a video call, and performing a call processing method suitable for each call signal type according to a determination result. To provide. Another object of the present invention is to reduce the load by reducing unnecessary NPDB lookup in the case of voice calls by applying different call processing schemes according to the type of originating signals, and in the case of video calls in advance before requesting a call connection to the destination exchange. The present invention provides a call processing method capable of performing efficient call processing by recognizing whether a called terminal supports video call in advance by performing NPDB inquiry. Still other objects of the present invention will become more apparent from the following detailed description and the accompanying drawings.

Call processing method according to an embodiment of the present invention that can achieve the above object, the step of receiving a call request; Determining a call type of the received call signal; As a result of the determination, when the originating call is a video call, inquiring a routing number of a communication service provider to which the called terminal is subscribed to the NPDB by the calling exchange; And requesting a picture exchange setting for the called terminal to a receiving side exchange according to the inquired routing number.

Call processing method according to another embodiment of the present invention, the step of receiving a call request; Determining a call type of the received call signal; If the originating call is a voice call, requesting called party location information from a calling party's home location register (HLR) corresponding to a prefix of called party number; Retrieving the routing number of the telecommunications carrier to which the called terminal is currently subscribed by NPNP when receiving an error message for the location information request from the home location register (HLR) of the telecommunication company corresponding to the prefix of the called party number; And requesting the receiving side exchange to set up the voice call for the called terminal according to the inquired routing number.

The call processing scheme according to the present invention is configured to distinguish whether an originated call is a voice call or a video call and to selectively perform the call processing using an ACQ scheme or a QoR scheme accordingly.

In one embodiment of the present invention, before the NPDB inquiry procedure after the number translation, the call is determined by searching for setup message information transmitted from the sender's mobile terminal. In consideration of the small amount, the ACQ method is used, and when the originated call is a voice call, the QoR method is used to reduce unnecessary NPDB inquiry processing procedures.

3 is a flowchart illustrating a process of processing a video call requested by a calling terminal according to an embodiment of the present invention when the called terminal is a number-shifted terminal. A process of processing an image call with reference to FIG. 3 will now be described in detail.

First, if there is a video call origination request from the originating terminal 10 (S302), the RNC 20 receives it and transmits it to the originating exchange 30 (S304). In this case, the determination as to whether the type of the outgoing call is a video call or a voice call may be performed by using a setup message transmitted from the RNC 20 to the originating exchange 30. Specifically, the specific field area of the setup message may be configured to include information (ITC) for identifying whether the originating signal of the calling terminal 10 is an image call or an audio call.

When the originating exchange 30 analyzes the setup message of the outgoing signal received from the RNC 20 and determines that the outgoing signal is an image call, it requests the NPDB 50 to inquire whether the number of the receiving terminal is ported (S306).

The NPDB 50 uses the called party number (CdPN) of the called terminal (CdPN) received from the calling exchange 30 when the number porting inquiry request is requested (S306). Check the routing number, and transmits the confirmed routing number information to the source exchange 30 (S308).

The originating exchange 30 transmits the routing information to the GMSC 40 using the routing number information received from the NPDB 50 (S310). In this case, the GMSC 40 includes information on the called party's number (CdPN), the caller's actual dialed number (CDN; Called Dial Number), and information about whether or not the NPDB 50 has been queried. Can transmit

The GMSC 40 requests the call setup to the receiving side exchange of the operator to which the receiving terminal is subscribed using the routing information received in step S310 (S312).

As shown in the embodiment of Fig. 3, when the called terminal is a number shifted terminal, the called terminal before requesting call setup to the called side exchange using the ACQ method (S312) using the ACQ method. By inquiring the NPDB 50 of whether or not the number has been transferred (S306), it is possible to determine whether the subscriber of the destination terminal is a subscriber of the third party or a third generation communication system capable of video communication. Therefore, the incoming subscriber who cannot support the image can proceed with the call connection procedure with the called party after switching to the voice call in the network of the calling terminal operator. Thereby, the problem in the QOR system can be solved. That is, in the situation where the receiver terminal does not support the video call in the situation that the protocol for the video call unsupported message between operators is not standardized, there may be a problem that the calling party continuously attempts the video call in the QOR method. In this case, the protocol may not be correct on the called side, and noise may occur. The problem may be solved by inquiring about the number of the called terminal through the NPDB 50 in advance as in the embodiment of FIG. 3. .

4 is a flowchart illustrating a process of processing a voice call requested by a calling terminal according to an embodiment of the present invention when the called terminal is a number-shifted terminal. Referring to Figure 3 specifically described the process of processing a voice call as follows.

First, if there is a voice call origination request from the originating terminal 10 (S402), the RNC 20 receives it and transmits it to the originating exchange 30 (S404). In this case, as in the embodiment of FIG. 3, the determination as to whether the type of the outgoing call is a video call or a voice call may be performed by using a setup message transmitted from the RNC 20 to the calling exchange 30. Specifically, the specific field area of the setup message may be configured to include information (ITC: Information Transfer Capability) on whether the originating signal of the calling terminal 10 is an image call or an audio call.

When the calling side exchange 30 analyzes the setup message of the outgoing signal received from the RNC 20 and determines that the outgoing signal is a voice call, the switching unit 30 transmits the call to the home location register (HLR) 70 of the service provider corresponding to the station number of the called party number. The called party requests location information (S406).

When the called terminal is a number ported terminal and cannot be inquired, the home location register (HLR) 70 notifies the calling side switch 30 of the error message notifying that the inquiry is not made (S408).

The originating exchange 30 receiving the error message inquires the routing number of the currently subscribed communication service provider of the receiving terminal to the NPDB 50 (S410).

The NPDB 50 uses the called party number (CdPN) of the called terminal received from the calling exchange 30 when the routing number inquiry request is requested (S410). Check the routing number, and transmits the confirmed routing number information to the source exchange 30 (S412).

The originating exchange 30 transmits the routing information to the GMSC 40 using the routing number information received from the NPDB 50 (S414). In this case, the GMSC 40 includes information on the called party's number (CdPN), the caller's actual dialed number (CDN; Called Dial Number), and information about whether or not the NPDB 50 has been queried. Can transmit

The GMSC 40 requests the call setup to the receiving side exchange of the operator in which the receiving terminal is entered using the routing information received in step S414 (S416).

As such, when the originating terminal is a voice call, the originating exchange 30 recognizes the voice call through the ITC information, and before the inquiry is made to the NPDB 50, the receiving terminal in the home location register 70 of the originating communication service provider. After checking whether the number has been subscribed first, it is not necessary to perform an unnecessary inquiry procedure by requesting the inquiry to the NPDB 50 only when the subscriber is not a subscriber.

While specific embodiments of the present invention have been illustrated and described, the technical spirit of the present invention is not limited to the accompanying drawings and the above description, and various modifications can be made without departing from the spirit of the present invention. It will be apparent to those skilled in the art, and variations of this form will be regarded as belonging to the claims of the present invention without departing from the spirit of the present invention.

As described above, the call processing method according to the present invention determines whether the type of the call signal requested by the calling terminal is a voice call or an image call, and applies a different call processing method according to the type of the call signal. Load can be reduced by reducing NPDB inquiry, and in case of video call, NPDB inquiry is performed before requesting a call connection to the destination exchange, so that the destination terminal can know whether or not the video call is supported and can perform efficient call processing. .

Claims (4)

delete Receiving a call request; Determining a call type of the received call signal; As a result of the determination, when the originating call is a video call, inquiring a routing number of a communication service provider to which a terminating terminal is subscribed to a number portability database (NPDB) at an originating exchange; And Requesting the video exchange setting for the called terminal to the receiving side exchange according to the inquired routing number, and determining the call type of the originating signal from the RNC 20 to the originating exchange. Method for performing call processing according to the originating signal type comprising the step of confirming the Information Transfer Capability (ITC information) included in the setup message. Receiving a call request; Determining a call type of the received call signal; If the originating call is a voice call, requesting called party location information from a calling party's home location register (HLR) corresponding to a prefix of called party number; Retrieving the routing number of the telecommunications carrier to which the called terminal is currently subscribed by NPNP when receiving an error message for the location information request from the home location register (HLR) of the telecommunication company corresponding to the prefix of the called party number; And And requesting, by a receiving side exchange, the voice call setting for the called terminal according to the inquired routing number. 4. The method of claim 3, wherein the determining of the call type of the originating signal comprises identifying information transfer capability (ITC information) included in a setup message transmitted from the RNC 20 to an originating exchange. Call processing performing method according to the call signal type.

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