KR101043204B1 - Method and system for providing call forwarding service in number portability service environment - Google Patents

Abstract

The present invention relates to a call processing method and system of a call forwarding call, and more particularly, to a method and system for simplifying call processing of a call forwarding call in an ACQ type number portability environment. A call processing method of a call forwarding call in a number portability environment of the present invention comprises the steps of: querying the number porting information of the called terminal from the originating MSC to the number porting server; Querying the forwarding telephone number (CFN) for the called terminal in the number porting server and providing the called MSC to the calling MSC; Querying, from the originating MSC, number transfer information of the call forwarding telephone number (CFN) to the NPDB; Querying the routing number (RN) for the call forwarding telephone number (CFN) in the number porting server and providing it to the originating MSC; And requesting location information of the called terminal from the originating MSC to a home location register corresponding to the routing number (RN).

ACQ, Number Portability, Call Forwarding

Description

Method and system of call forwarding call in number portability environment {Method and system for providing call forwarding service in number portability service environment}

The present invention relates to a call processing method and system of a call forwarding call, and more particularly, to a method and system for simplifying call processing of a call forwarding call in an ACQ type number portability environment.

Mobile Number Protability (MNP) technology means that the mobile subscriber changes the mobile carrier while maintaining the number used by the mobile subscriber, and the subscriber can change the existing telephone number even after changing the mobile carrier. It will be possible to receive a mobile communication service while maintaining the same.

Such a number portability technique is classified into a query on release (QoR) method and an all call query (ACQ) method according to an implementation method thereof, which will be described with reference to FIGS. 1 and 2.

1 is a flowchart of number portability call processing in a QoR scheme.

As shown in FIG. 1, in the QoR scheme, an outgoing MSC 100 (MSC; Mobile Switching Center (MSC)) that receives an outgoing call request from an originating terminal (not shown) is also referred to as a called terminal (not shown). , HLR1 (300) (HLR: Home) of a mobile carrier corresponding to a prefix (eg, 011, 016, 019, etc.) included in a mobile phone number (MSISDN) of the mobile station International Identifier Number (MSISDN). If the location register query the location of the called terminal with the Send Routing Info (SRI) REQ message (S10), the HLR1 300 queries the database and the information of the called terminal does not exist (Invalid Subscriber). The req ack message is transmitted to the originating MSC 100 (S11).

The originating MSC 100 then makes a number portability query for the MSISDN to the NPDB (Number Portability Database) 200 (S12), and the carrier information (eg, routing number) to which the destination terminal is currently subscribed (RN; Routing Number). ) Is received (S13).

Subsequently, the originating MSC 100 inquires the location of the called terminal to the HLR2 400 of the mobile carrier corresponding to the routing number RN (Location Request) (S14), and the HLR2 400 identifies the international mobile station of the called terminal. A Call Routing Number (PRN) message including an International Mobile Station Identity (IMSI) is transmitted to the destination MSC 500 to request call setup (S15).

Then, the terminating MSC 500 transmits a prn ack message including a Temporary Local Directory Number (TLDN) for call setup to the HLR2 400 (S16), and the originating MSC (from the HLR2 400). By transmitting the temporary local directory number for the call setup to the sri req ack message (100) (S17), the call setup is completed between the originating MSC 100 and the terminating MSC 500, and thus the calling terminal. A call is also connected between the call and the called terminal.

2 is a flowchart of number portability call processing in the ACQ scheme.

In the ACQ method, a call processing is performed by first performing a number porting query to the NPDB before processing an incoming call on an originating network or a relay network.

As shown in FIG. 2, in the ACQ scheme, when there is a call request from the originating terminal, the originating MSC 100 first makes a number portability query for the called terminal to the NPDB 200 (S20). RN) is received (S21).

Subsequently, the originating MSC 100 transmits the call to the HLR2 400 of the mobile communication carrier corresponding to the routing number (RN) (S22), and the HLR2 400 performs a procedure necessary for establishing a call with the destination MSC 500. The call is then established by sending the result to the originating MSC 100 (S23, S24, S25).

In this way, the ACQ method may inquire whether the number portability for all calls, the load on the NPDB can be increased, but the call processing procedure is simplified. When both video call processing and voice call processing are performed in ACQ according to the overall spread of 3G terminals and smooth construction of 3G network, the simplification of call processing procedure becomes more important in consideration of the system construction cost of a mobile communication company.

However, when the numbered mobile communication receiver subscribes to the call forwarding service and needs to handle the number portability service and the call forwarding service at the same time in the mobile communication network, in the case of the ACQ-type number portability technology, a fatal problem is associated with the simplification of call processing. Will occur. This will be described with reference to FIG. 3.

3 is a flowchart of number portability call processing in an ACQ scheme for a call forwarding service subscriber.

As shown in FIG. 3, first, the originating MSC 100 makes a number portability query for the called terminal to the NPDB 200 (S30), and receives a routing number (RN) of the called terminal (S31).

Subsequently, the outgoing MSC 100 forwards the call to the HLR2 400 of the mobile carrier corresponding to the routing number RN (S32), and the HLR2 400 sends a call forwarding number (CFN) database. Inquire and transmit a sri req ack message including a call forwarding telephone number (CFN) corresponding to the routing number (RN) to the originating MSC (100) (S33).

In the ACQ method, the originating MSC 100 queries the NPDB 200 for all calls except when the routing number (RN) is received from the NPDB 200. Therefore, the originating MSC 100 is included in the received sri req ack message. The originating MSC 100 for the call forwarding telephone number again makes a number portability query to the NPDB 200 (S34).

Subsequently, as a result of the number portability query, a new routing number (RN2) is received (S35), and the originating MSC 100 transmits the call to the HLR3 450 of the mobile communication company corresponding to the routing number (RN2) (S36), After the HLR3 450 performs the procedure necessary for call establishment with the incoming MSC 500, the call is established by transmitting the result to the originating MSC 100 (S37, S38, S39).

As such, in the case of call processing for a call forwarding service subscriber, the call processing procedure becomes more complicated than the QoR method, and thus cannot take advantage of the ACQ method in terms of simplifying call processing. Although the number of mobile subscribers is inevitable, a considerable investment in facility expansion such as NPDB 200 is inevitable for the introduction of the call processing procedure of the ACQ method. The problem is that the processing procedure is rather complicated.

An object of the present invention is to solve a problem that a call processing procedure becomes complicated in call processing for a call forwarding service subscriber in an ACQ number portability system.

In addition, the present invention, in response to the number portability query, by providing a call forwarding telephone number to the call forwarding telephone number (CFN) database in the number porting server (NPDB), the number for the original telephone number subscribed to the call forwarding service It is an object of the present invention to provide a method and system for simplifying call processing procedures that can omit the mobility service procedure.

In addition, the present invention is to build a call forwarding phone number (CFN) information in the number porting server (NPDB) and to provide a number portability information and call forwarding phone number information from the NPDB to simplify the call processing procedure to the destination MSC And to provide a system.

In addition, the present invention provides a method and system that can simplify the call processing procedure by having a number porting server (NPDB) in the home location register (HLR) to perform a location query (Location Request) for the destination terminal For the purpose of

A call processing method of a call forwarding call in a number portability environment of the present invention for achieving the above object comprises the steps of: querying the number porting information of the called terminal from the originating MSC to the number porting server; Querying the forwarding telephone number (CFN) for the called terminal in the number porting server and providing the called MSC to the calling MSC; Querying, from the originating MSC, number transfer information of the call forwarding telephone number (CFN) to the NPDB; Querying the routing number (RN) for the call forwarding telephone number (CFN) in the number porting server and providing it to the originating MSC; And requesting location information of the called terminal from the originating MSC to a home location register corresponding to the routing number (RN).

In addition, a call processing method of a call forwarding call in a number portability environment according to another aspect of the present invention for achieving the above object, the step of querying the number porting information of the called terminal to the number porting server in the originating MSC; Querying the forwarding telephone number (CFN) for the called terminal in the number porting server and providing the called MSC to the calling MSC; Querying, from the originating MSC, number transfer information of the call forwarding telephone number (CFN) to the NPDB; And querying a routing number (RN) for the call forwarding telephone number (CFN) in the number porting server and requesting location information of the called terminal to a home location register corresponding to the routing number (RN). Characterized in that.

In addition, a call processing method of a call forwarding call in a number portability environment according to another aspect of the present invention for achieving the above object, the step of querying the number porting information of the called terminal to the number porting server in the originating MSC; Retrieving a call forwarding telephone number (CFN) for the called terminal and a routing number (RN) for the call forwarding telephone number (CFN) from the number porting server; And requesting location information of the called terminal from the number porting server to a home location register corresponding to the routing number (RN).

In addition, the number porting call is characterized in that it follows the number portability of the ACQ method in the 3G network.

On the other hand, the call processing system of the call forwarding call in the number portability environment according to the present invention for achieving the above object, the originating MSC for calling the call; A number porting server simultaneously having call forwarding telephone number (CFN) information for terminals subscribed to a call forwarding service in addition to the number porting information for the number ported terminals; And a home location register for receiving a location request for the terminal from the originating MSC or the number porting server and requesting call setup to the destination MSC.

In addition, in a call forwarding call processing system in a number portability environment according to another aspect of the present invention for achieving the above object, the number porting server queries the call forwarding telephone number (CFN) information to correspond to the call call; After confirming that there is no call forwarding telephone number (CFN), and after querying the number porting information, and transmitting the location request for the terminal to the home location register corresponding to the inquiry routing number (RN) do.

In addition, in a call forwarding call processing system in a number portability environment according to another aspect of the present invention for achieving the above object, the number porting server inquires both the call forwarding telephone number (CFN) information and the number porting information; Afterwards, the location request for the terminal is transmitted to the home location register corresponding to the routing number RN corresponding to the inquiry forwarding telephone number CFN.

In addition, the call processing system of the call forwarding call in the above number portability environment is characterized in that the 3G network ACQ system number portability system.

According to the present invention, a problem that a call processing procedure is complicated in call processing for a call forwarding service subscriber in an ACQ number portability system is solved.

Further, according to the present invention, in response to the number portability query, by providing a call forwarding telephone number with reference to the CFN database in the number porting server (NPDB), to the original telephone number subscribed to the call forwarding service Provided are a method and a system for simplifying a call processing procedure that can omit a number portability service procedure.

Further, according to the present invention, call forwarding to the final recipient MSC can be simplified by constructing CFN information in the number porting server (NPDB) and providing the number portability information and the call forwarding phone number information in the NPDB. Methods and systems are provided.

In addition, according to the present invention, the method and system that can simplify the call processing procedure by having a number porting server (NPDB) to perform a location request (Location Request) to the destination terminal to the home location register (HLR) Is provided.

Hereinafter, with reference to the accompanying drawings will be described embodiments of the present invention;

4 is a flowchart illustrating a call processing method of a call forwarding call in an ACQ type number portability environment according to an embodiment of the present invention.

In order to perform the call processing of FIG. 4, the number porting server (NPDB) 200 simultaneously transmits the call forwarding telephone number (CFN) information for the terminals subscribed to the call forwarding service in addition to the routing information for the number ported terminals. Equipped.

First, the originating MSC 100 transmits an SRI REQ message including the mobile telephone number (MSISDN) of the called terminal to the NPDB 200 to perform a number portability query (S40), and the NPDB 200 receives the received mobile phone. The CFN information is queried for the number, and a sri req ack message including a call forwarding telephone number (CFN) corresponding to the number is transmitted to the originating MSC 100 (S41). If the destination terminal is not subscribed to the call forwarding service, NPDB 200 performs the step (S43) of transmitting the number porting information to the originating MSC (100).

According to the ACQ scheme, the originating MSC 100 performs a number portability query on the NPDB 200 using the received forwarding telephone number (CFN) as the called number (S42), and the NPDB 200 forwards the call forwarding telephone number ( Inquire CFN information to confirm that there is no call forwarding telephone number (CFN) corresponding to it, and then look up the number porting information and transmit the sri req ack message including the routing number (RN) to the originating MSC 100 again. (S43).

Subsequently, the originating MSC 100 transmits the received routing number (RN) to the home location register (HLR3) 450 that has jurisdiction (S44), and the procedure required for the HLR3 450 to establish a call with the destination MSC 500. After performing the transmission to the originating MSC (100) (S45, S46, S47), the call is established between the originating MSC 100 and the terminating MSC (500).

The process of FIG. 4 omits the process of inquiring and replying to the home location register (HLR2) 400 compared to the process of FIG. 3, thereby simplifying call processing and reducing call throughput and load of the entire communication system. Bring.

5 is a flowchart illustrating a call processing method of a call forwarding call in an ACQ number portability environment according to another embodiment of the present invention.

In order to perform the call processing of FIG. 5, the number porting server (NPDB) 200 simultaneously transmits the call forwarding telephone number (CFN) information for the terminals subscribed to the call forwarding service in addition to the routing information for the number ported terminals. Equipped. In addition, the NPDB 200 of FIG. 5 has its own function of performing a location request for a called terminal to a home location register (HLR) directly without passing through an MSC (eg, originating MSC 100). It is equipped with.

First, the originating MSC 100 transmits an SRI REQ message including the mobile telephone number (MSISDN) of the called terminal to the NPDB 200 to perform a number portability query (S40), and the NPDB 200 receives the received mobile phone. The CFN information is queried for the number, and a sri req ack message including a call forwarding telephone number (CFN) corresponding thereto is transmitted to the originating MSC 100 (S51). If the destination terminal is not subscribed to the call forwarding service, NPDB 200 performs a step (S53) of transmitting a signal to the home location register (HLR3) 450 in accordance with the number porting information.

According to the ACQ scheme, the originating MSC 100 performs a number portability query on the NPDB 200 using the received forwarding telephone number (CFN) as the called number (S52).

Subsequently, the NPDB 200 inquires the forwarding telephone number (CFN) information to confirm that there is no corresponding forwarding telephone number (CFN). Then, after inquiring the number porting information, the NPDB 200 checks the inquired routing number (RN). The home location register (HLR3) 450 directly transmits a location query (Location Request) for the called terminal (S53). To this end, the NPDB 200 substitutes an OPC (Originating Point Code) (local station signal point, that is, information of a sender) with an NPDB value, and replaces a DPC (Destination Point Code) (international signal point, that is, information of a receiver). Set to the HLR value corresponding to the routing number (RN).

Subsequently, after HLR3 450 performs the procedure necessary for call establishment with the incoming MSC 500, the result is transmitted to the originating MSC 100 (S54, S55, S56), and the originating MSC 100 and the incoming MSC ( The call is set between 500).

The process of FIG. 5 simplifies call processing by performing a location query for the destination terminal from the NPDB 200 directly to the destination home location register (HLR2) 400 without going through the originating MSC 100 compared to the process of FIG. 4. This further reduces the call throughput and load of the entire communication system.

6 is a flowchart illustrating a call processing method of a call forwarding call in an ACQ scheme of number portability according to another embodiment of the present invention.

In order to perform the call processing of FIG. 6, the NPDB 200 simultaneously transmits CFN information for terminals subscribed to the call forwarding service in addition to routing information for the number ported terminals. Equipped. In addition, the NPDB 200 of FIG. 6 has its own function of performing a location request for a called terminal to a home location register (HLR) directly without passing through an MSC (eg, originating MSC 100). It is equipped with.

First, the originating MSC 100 transmits an SRI REQ message including the MSISDN of the called terminal to the NPDB 200 to perform a number portability query (S60).

After receiving the number portability query, the NPDB 200 inquires all of the CFN information and the number portability information for the corresponding mobile phone number (MSISDN), and then corresponds to the inquired call forwarding number (CFN). The home location register (HLR3) 450 corresponding to the routing number RN directly transmits a location request to the called terminal (S61). To this end, the NPDB 200 substitutes an OPC (Originating Point Code) (local station signal point, that is, information of a sender) with an NPDB value, and replaces a DPC (Destination Point Code) (international signal point, that is, information of a receiver). Set to the HLR value corresponding to the routing number (RN).

Subsequently, after HLR3 450 performs the procedure necessary for call setup with the destination MSC 500 and transmits the result to the source MSC 100 (S62, S63, S64), the destination MSC 100 and the destination MSC ( The call is set between 500).

The process of Figure 6 is compared to the process of Figure 5 after the number portability query from the originating MSC (100) to the NPDB (200), the incoming home position register directly from the NPDB (200) without going through the originating MSC (100) By performing a location query for the called terminal number-numbered and forwarded to HLR2) 400, the call processing is further simplified to greatly reduce the call throughput and load of the entire communication system.

While the present invention has been described with reference to preferred embodiments of the present invention, various modifications, changes, and modifications will be possible without departing from the scope of the present invention as set forth in the claims of the present application. In particular, the embodiments of the present invention have been disclosed for the case of 3G mobile communication network, but may be applied according to the same principle regardless of the type of 2G mobile communication network, other various intelligent networks, etc., even in the case of QoR type number portability technology In accordance with the principles of the present invention will be applicable.

The present invention is mainly applicable to all cases in which call processing of a call forwarding call is performed in various mobile communication networks to which ACQ number portability technology is applied.

1 is a flowchart illustrating a number portability call processing in a QoR scheme according to the prior art.

2 is a flowchart of a number portability call processing of the ACQ scheme according to the prior art.

3 is a flowchart of number portability call processing in an ACQ scheme for a call forwarding service subscriber according to the prior art.

4 is a flowchart illustrating a call processing method of a call forwarding call in an ACQ type number portability environment according to an embodiment of the present invention.

5 is a flowchart illustrating a call processing method of a call forwarding call in an ACQ number portability environment according to another embodiment of the present invention.

6 is a flowchart illustrating a call processing method of a call forwarding call in an ACQ scheme of number portability according to another embodiment of the present invention.

Claims (10)

       Querying the number porting information of the called terminal from the originating MSC to the number porting server;       Querying the forwarding telephone number (CFN) for the called terminal by the number porting server and providing the called MSC to the calling MSC;       Inquiring the number porting information of the call forwarding telephone number (CFN) from the originating MSC to a number portability database (NPDB) of a number porting server;       Querying a routing number (RN) for the call forwarding telephone number (CFN) in the number porting server and providing the routing number (RN) to the originating MSC;       And requesting location information of the called terminal to a home location register corresponding to the routing number (RN) in the calling MSC.       The call processing method of claim 1, wherein the number porting call conforms to the number portability of the ACQ scheme in a 3G network.       Querying the number porting information of the called terminal from the originating MSC to the number porting server;       Querying the forwarding telephone number (CFN) for the called terminal by the number porting server and providing the called MSC to the calling MSC;       Inquiring the number porting information of the call forwarding telephone number (CFN) from the originating MSC to a number portability database (NPDB) of a number porting server;       Querying a routing number (RN) for the call forwarding telephone number (CFN) in the number porting server and requesting location information of the called terminal to a home location register corresponding to the routing number (RN); A call processing method for a call forwarding call in a number portability environment.       The call processing method according to claim 3, wherein the number porting call conforms to the number portability of the ACQ scheme in a 3G network.        Querying the number porting information of the called terminal from the originating MSC to the number porting server;       Retrieving a call forwarding telephone number (CFN) for the called terminal and a routing number (RN) for the call forwarding telephone number (CFN) from the number porting server;       And requesting location information of the called terminal to a home location register corresponding to the routing number (RN) in the number porting server.       The call processing method according to claim 5, wherein the number porting call conforms to the number portability of the ACQ scheme in a 3G network.         An originating MSC for making a call;       A number porting server having simultaneous call forwarding telephone number (CFN) information for terminals subscribing to a call forwarding service in addition to the number porting information for the number ported terminals;       And a home location register for receiving a location request for the terminal from the originating MSC or the number porting server and requesting call setup from the destination MSC.       The mobile terminal of claim 7, wherein the number porting server inquires the call forwarding telephone number (CFN) information to confirm that there is no call forwarding telephone number (CFN) corresponding to the call, and then inquires the number porting information. And forwarding the location request for the terminal to the home location register corresponding to the inquired routing number (RN).       The apparatus of claim 8, wherein the number porting server inquires both the call forwarding number (CFN) information and the number porting information, and then corresponds to a routing number (RN) corresponding to the called call forwarding number (CFN). Call forwarding system of the call forwarding call in the number portability environment, characterized in that for transmitting the location request for the terminal to the home location register.       The call processing system according to any one of claims 7 to 9, wherein the call processing system of the call forwarding call in the number portability environment is an ACQ type number portability system of a 3G network. system.

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