KR100296144B1 - Service Provider Number Portability Call Control Method using Structure of Number Portability Routing Database - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a service provider number portability call control method.

2. The technical problem to be solved by the invention

An object of the present invention is to provide a service provider number portability call control method and a recording medium using a number portability routing database.

3. Summary of Solution to Invention

The present invention includes a first step of requesting a routing number to a number portability service controller by determining that a requested number is a call of a portability block number; A second step of searching for the number portability routing database by the number portability service controller that has received the routing number; A third step of returning an identification address of the new destination exchange if the routing number corresponding to the called number has been moved to its own network, and returning the called network address if the routing number corresponding to the called number has not been transferred to its own network; And the originating exchange route to the new destination exchange if the returned address is the identification address of the new destination exchange, and route to the destination network if the returned address is the destination network address.

4. Important uses of the invention

The present invention is used in an exchange system.

Description

Service Provider Number Portability Call Control Method using Structure of Number Portability Routing Database}

The present invention provides a service provider number portability call control method using a number portability routing database mounted in an intelligent network service controller (SCP) in an intelligent network based number portability system, and a computer-readable recording medium recording a program for realizing the method. A computer readable recording medium having recorded thereon data of the number portability routing database.

First, Number Portability refers to enabling a service subscriber to change a service provider, a service location, and a service type without changing a telephone number previously used. The service provider number portability is a method in which a subscriber can continue to use an existing phone number even if the subscriber changes his service provider during number portability.

Next, look at the conventional similar technology as follows.

US Pat. No. 5,598,464 (Method and apparatus for providing local number portability, dated 28 January 1997), in which "Thomas L. Hess" et al., Patented in the United States, is no longer connected to an existing destination exchange that is connected before the subscriber is moved. It determines that the subscriber is not connected to its exchange, and triggers requesting routing information from the service node. Alternatively, the exchange receiving the ISUP release message from the existing destination exchange triggers a request for routing information from the service node, and receives the routing information from the service node and completes a call received at the ported number. That's the way it is.

A service node is a system in which a service switch (SSP) and a service controller (SCP) are implemented in one node. The service node also has a signal relay function of an originating exchange requesting a trigger and an incoming exchange period during which routing is performed. It may also have a gateway function that may be connected to the operator's exchange. The routing database in the service node consists of a table with a routing number relationship indicating the subscriber's telephone number and the destination exchange.

In addition, US 5,748,724 (Method for transfer a subscriber to a new service provider: May 5, 1998), in which "Edward Sonnenberg" has been patented in the United States, uses telecommunications services within the same area to handle number portability. It proposes a method of allocating a three digit Service Provider Area (SPA) code to a local service provider, and uses this SPA code for routing in the area. Since the area code in each area is the same, replace the area code with the SPA code when routing, and use the SPA code and the directory number of the called party for routing.

The Number Portability Routing Database has a table that maps the SPA code with the directory number of the mobile subscriber. The Number Portability Service Controller (SCP) receives a query of the originating exchange and returns the directory number of the subscriber who has been SPA code transferred from the Number Portability Routing Database.

In addition, US5,793,857 (Method of using dynamic database to improve telephone number portability: August 11, 1998), in which "Stephen Dean Barnes" et al., Patented in the United States, is structurally distributed to provide telephone number portability. By placing an address capture database (ACDB) at the tandem exchange level in a telephone system, a method of mapping a called number from a local operator's tandem exchange's ACDB to a new routing number without accessing the number portability routing database.

Old or low-retrieval records in the ACDB inside each operator's tandem switch are deleted to add new records. Tandem exchanger in a provider in a structure in which a service controller (SCP) having a master database that exists independently without a service controller (SCP) for each provider is connected to and serviced by a Local Carrier's Carrier (LCC) that connects operators. It's about how to keep the ACDB on and access and manage it locally.

On the other hand, each provider's network should be interworked to provide service provider number portability, but the caller from his network is connected to the existing destination network where the called party was previously connected to route to the called party. A trombone phenomenon may occur that attempts to route and then back to the originating network.

A conventional technique for providing number portability is a call forwarding scheme provided in an existing exchange. In this way, an existing destination exchange connects to a new destination exchange through a new call setup, where a call setup is made once from an originating exchange to an existing destination exchange, once from an existing destination exchange to a new destination exchange, and twice. There is a disadvantage in that the called party does not know the actual telephone number, and there is a disadvantage in that a new number is additionally needed to route from the existing exchange to the new destination.

In addition, when interworking between mobile operators is required to process a forwarded number, there is a hassle that other operators need to know the routing information of a specific exchange of another operator to route a call. There is a disadvantage in that it is difficult to guarantee the privacy of the routing information.

In terms of data management, routing data must be added or changed for new routing in all existing exchanges to which the number moving the service provider belongs, and mobile routing data for each exchange must be managed.

As described above, the switch-based call switching scheme requires an additional number for call forwarding. However, in the number portability routing database of the intelligent network service controller (SCP) of the present invention, an additional number per subscriber number is ported using the exchange identification number. To solve the necessary disadvantages.

In addition, the conventional technology has a disadvantage in that even if the interworking between operators need to know the routing information in a specific exchange of other operators, the privacy of the network routing information in the carrier by applying the two-step routing address translation method of the present invention (Privacy) To ensure).

In addition, in applying the two-stage routing address translation method, when a call is received from the subscriber's number that has been transferred from his network to the subscriber's network, the subscriber's number movement status is checked by using the number portability routing database. By integrating two-step routing address translation, we want to avoid unnecessary routing and reduce call setup time.

In order to solve the above problems, in the present invention, in order to shorten the call setup of the prior art for processing number portability, a number porting routing database is placed in an intelligent network service controller (SCP) to identify a new destination network identification address or a new destination exchange. By designing the database to retrieve the address, we configure the existing exchange so that it is not involved in call setup during call routing.

In addition, the present invention applies a two-stage routing address translation method that delivers only the carrier's network identification address to another provider's network in order to compensate for the disadvantage of exposing routing information in a specific exchange of other operators when interworking between operators is required.

In addition, in the present invention, in applying a two-stage routing address translation method, the number portability routing is performed so that the called exchanger identification address can be searched when the call is handled by the subscriber's number that is sent from the own network and moved to the own network. By designing the database, it is configured to prevent unnecessary routing during call routing and to reduce call setup time.

In addition, the present invention uses an intelligent network application protocol as an interface between the originating exchange and the service controller to compensate for the disadvantage of not knowing the source number of the prior art for processing number portability.

In addition, the present invention uses an exchange identification address for routing a call to compensate for the shortcomings of prior art number wastage for handling number portability, which does not require an additional number per mobile subscriber, one number per exchange. You only need to assign it.

Accordingly, the present invention provides a service provider that provides number portability so that incoming calls are completed without exposing the address of an exchange existing within the network provider to other operators by only delivering a network identifier newly received when routing information is transferred to other providers. In addition, the number portability routing database is used to retrieve a new destination exchange address by recognizing that the new destination network is its own network when handling a call that is received from the subscriber's number that has been transferred from its own network to the own network. The purpose of the present invention is to provide a call control method for controlling a service provider number portability call and a computer readable recording medium storing a program for realizing the method.

1 is a conceptual diagram of service provider number portability to which the present invention is applied;

Figure 2 is an embodiment processing flow diagram for a two-stage routing address translation method for processing incoming calls for a mobile subscriber in accordance with the present invention.

Figure 3 is an embodiment processing flow diagram for a routing address translation method when the calling network is a new destination network of the transferred destination number according to the invention.

4A and 4B illustrate an embodiment structure diagram of a number portability database for mapping a called number to a routing number for service provider number portability according to the present invention.

* Explanation of symbols for the main parts of the drawings

3,4: Number portability routing database 5,10: Local exchange

6,9 relay service switch 7,8 gateway service switch

11,13: telephone subscriber 14,15: number portability service controller

In the method of the present invention for achieving the above object, in the service provider number portability call control method applied to the switching system, an intelligent network protocol message by determining that the number requested by the originating exchange to which the calling party is connected is a call of the mobility block number. Requesting a routing number to the number portability service controller using a first step; A second step of searching for a number portability routing database by the number portability service controller that has been requested a routing number; If the routing number corresponding to the called number is the number that has moved to its own network, as a result of the search in the second step, the identification address of the new destination exchange is returned, and if it is not the number that has moved to its own network, it returns the called network address. Three steps; And the originating exchange route to the new destination exchange if the returned address is the identification address of the new destination exchange, and route to the destination network if the returned address is the destination network address. do.

In addition, another method of the present invention, in the service provider number portability call control method applied to the switching system, the new destination network by providing a routing information that can identify the new destination network by searching the number portability routing database in the originating network A first step of partially rooting with; And a second step of routing a call routed to the new destination network to search its number portability routing database in the new destination network to the final destination, wherein each number portability routing database corresponds to a mobility block number. A mobility possibility number table for indicating a number mobility routing table; And the number portability routing table for mapping the routing address per number of the subscriber to be moved, the mobile state of the subscriber to be moved, the number movement time and the number information.

On the other hand, the present invention, in the switching system having a large processor, the calling exchange connected to the calling party determines that the requested number is the call of the portability block number, and requests a routing number to the number portability service controller using an intelligent network protocol message. A first function of doing; A second function of searching for a number portability routing database by the number portability service controller that has been requested a routing number; As a result of the search in the second function, if the routing number corresponding to the called number is the number that has moved to its own network, the identification address of the new destination exchange is returned, and if it is not the number that has moved to its own network, it returns the called network address. Third function; And the originating exchange computer routes a program for realizing a fourth function of routing to the new destination exchange if the returned address is the identification address of the new destination exchange, and routing to the destination network if the returned address is the destination network address. It provides a recording medium that can be read by.

In addition, the present invention provides a switching system having a large capacity processor, the number portability routing database comprising: a mobility block number record indicating a station number of a mobile subscriber number; A routing table indicator record indicating a routing address in the number portability routing table; A carrier identifier record indicating a network operator; Called number record indicating the subscriber's telephone number; A routing address record indicating an address to be routed; A number shift status record for identifying a shifted number status; A number shift processing time record indicating a time point at which number portability starts; And a first function of including a number information record indicating information about a number, wherein the first function of searching the number portability routing database in an originating network and providing routing information for identifying a new destination network to partially route to the new destination network; And a computer-readable recording medium having recorded a program for realizing a second function of routing a call routed to the new destination network to search its number portability routing database in the new destination network and route it to the final destination. .

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a conceptual diagram of service provider number portability to which the present invention is applied, and is a view for explaining service provider number portability as a domain of the present invention.

1 is a diagram illustrating a service provider number portability concept together with a telephone network device that allows a telephone subscriber to use the same number used by the subscriber when changing the telephone network to which the subscriber subscribes to another operator.

For example, the telephone subscriber 11 using the telephone number 042-123-4567 is connected to the local exchange 5 of the operator A network 1 to receive telephone service, and then establishes a connection with the operator A network 1. Suppose you want to hang up (12) and connect to a new operator B network (2) to get telephone service. In this case, the service provider number portability means that the subscriber 11 can move to another provider while using the telephone number 042-123-4567 (11) as it is without changing it.

Within each provider network (1, 2) there is a number portability service controller (SCP) 14,15 and a number portability routing database 3,4 for providing service provider number portability. Calls arriving at the telephone subscriber 13 by number translation of the number portability service controllers 14 and 15 through the number portability routing database search are routed to the local exchange 10 of the new provider B network 2. When the interworking of the provider networks 1 and 2 is necessary, it is via the gateway exchange service switch 7 and 8 of each provider. The mobile telephone subscriber 13 can use the telephone number 042-123-4567 (13) without changing by the number portability capability provided by each provider network 1,2.

2 is a flowchart illustrating a two-step routing address translation method for processing an incoming call to a mobile subscriber according to the present invention. A diagram illustrating a two-stage routing address translation method that translates an address.

The network structure constituting the service provider number portability includes an outgoing network 32 to which a call of the calling party 31 is connected, an existing called network 35 that has called a call before the called number is moved, and a called party number. It consists of a new incoming network 39, etc., to which the subscriber is currently connected. Existing called network 35 is a network of ported-out service providers whose phone number subscribers have moved, and new incoming network 39 is a ported-in service provider whose numbers have been moved by telephone number subscribers. Is the net.

When the subscriber moves to the service provider, the existing destination network 35 and the new destination network 39 are determined, but the originating network 32 is not fixed because the network can be transmitted from any network. That is, the existing destination network 35 and the new destination network 39 may be originating networks. In FIG. 2, the originating network 32 is shown as independent for explanation.

In the case of sending a call from the calling party 31 to the called party 37, the routing address translation scheme of two levels may be used to route the call to the called party 37 in the new called network 39. . In the originating network 32, only routing information for identifying the new destination network 39 is provided to partially route to the new destination network 39. The new called network identification address can be retrieved from the number portability routing database 33 in the originating network 32. Calls routed to the new destination network 39 require a new destination exchange identification address for the call to be routed to the final destination within the new destination network 39. This information can be retrieved from the number portability routing database 40 in the new destination network 39. Calls can be routed to the destination party using this new destination exchange identification address.

After a call routed to the destination network direction (34, 35, 36) before the called party (37) is moved, the new destination network is identified from the number portability routing database (33) in the calling network (32) after the called party (37) moves. The address is retrieved, and the new destination exchange identification address is provided from the number portability routing database 40 in the new destination network 39, and the destination 37 is completed. Using the two-stage routing address translation method, each network operator stores the final routing address for port-in subscribers, and only the new called network identification address in the number portability routing database for mobile subscribers that do not. All you have to do is.

3 is a flowchart illustrating a method for translating a routing address when the calling network is a new called network of a transferred called number according to the present invention.

Before the number was moved, the call was transferred from the calling party operator network 64 to the existing called operator network 65 having the existing called operator 63 in order to route the call to the called party. At this time, through the gateway switch (61, 62) for interworking between network operators. The destination 59 completes the transfer from the B operator network 65 to the A operator network 64, and the caller 51 connected to the A operator network 64 transfers the call to the called party 59. Try.

In the case where the calling network is a new called network of the transferred called number, that is, when interworking does not occur to another network and routing occurs inside the calling network provider, the two-stage routing address translation as described above in FIG. 2 is integrated. . The originating exchange 53 to which the calling party 51 is connected determines that the called-in request number 52 is a call in the portability number block, and sends a routing number to the number portability service controller 66 using the intelligent network protocol message 54. request.

The number portability service controller 66 detects a request from the originating exchange 53 and searches the number portability routing database 55. The search result of the number portability routing database 55 checks that the routing number corresponding to the called number is the number that has moved to its network, and returns the identification address of the new destination exchange 58. If the check result is not a number that has been moved to its own network, the called party's identification address is returned. The originating exchange 53 receives the routing number from the number portability service controller 66 and routes to the routing address. In this case, it routes to the new destination exchange 58. The new destination exchange 58 completes the incoming call by connecting the route routed to the called party 59.

4A and 4B illustrate an embodiment structure diagram of a number portability database for mapping a called number to a routing number for service provider number portability according to the present invention.

The number portability routing database includes a portability number table 71 and a number portability routing table 81. The mobility number table 71 is a table for indicating a routing table corresponding to the mobility block number 72.

The mobility block number 72 is a record representing the first three digits (excluding the area code) or six digits (including the area code) 78 indicating the station number of the mobile subscriber telephone number. This number refers to the exchange number. If one of the 10,000 subscribers of each station number of the exchange moves the number, the station number is treated as a mobility block. This number is stored as a six digit character value 75.

The routing table indicator 73 is a record for instructing that a routing address in the routing table can be accessed to find a routing address for the specific number when the specific number in the portability block number 72 has been moved. This number can be stored as a 10 digit character value 76 and points to a table of that block.

The operator identifier 74 is a record indicating the operator 80 operating the mobility block number 72. The operator identifier 74 may include a ten digit character value 77. Used when you need to know the carrier.

The number portability routing table 81 is a table for mapping a routing address per number of a subscriber to be moved, the mobility status of the subscriber to be moved, the number movement time and number information.

The called number 82 is a record indicating the subscriber's telephone number used by the actual telephone number subscriber. This number can be stored as a 12-digit character value 87 or a 4-digit ending number of telephone numbers that telephone subscribers dial when making a call (92). Used as a key value when searching a database.

There are two types of routing addresses 83 used in the two-stage number translation method, which is the application method of the present invention. One is a new destination network identification address 93, which is a number indicating a new provider network when the telephone subscriber moves to a new provider network. This number represents the gateway exchange of the new destination network and is stored as a 10-digit character value 88 as information that identifies the network but is not capable of complete routing. The other is a new destination exchange identification address 93 representing a new destination exchange when the telephone subscriber has moved to his / her own provider network. This number represents the new destination exchange and is stored as a 10 digit character value 88 as complete routing information. When moving to the operator's own network, the service controller (SCP) can transmit the new destination exchange identification address (93) to the service switch (SSP) to eliminate the unnecessary routing trombone phenomenon in the network.

The number shift status 84 is a record for identifying the shifted number status. This number is managed within the operator and stored as a single-digit character value (89), using this identifier to determine whether the number has been moved (Port-In), moved out (Port-Out), own network and The number may indicate whether it is a ported number irrespective of whether it has been moved but is currently in a vacant state by the subscriber being unsubscribed (94).

The number transfer processing time 85 is a record indicating a time point at which telephone number portability starts. This record allows the telephone number portability application logic to determine the start time 95 of providing routing information for the called number.

The number information 86 is a record for storing information on the telephone number, such as the characteristics of the called number and the authority for the number. The information 96 of subscribers that need to be transmitted through a telephone network or other network may be stored, and stored as a 30 digit character value 91.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary knowledge.

As described above, the present invention complements an exchange-based number portability providing scheme, and provides service providers that provide number portability to other routers, thereby delivering only new network identifiers that are newly received. There is an effect that the incoming call can be completed without revealing the address of the exchange.

In addition, in applying the two-stage routing address translation method, the number in the number portability service control system is that the new destination network is its own network when processing a call that is sent to the number of subscribers who originated from its own network and moved to its own network. By designing the database to search the mobile routing database to retrieve the new destination exchange address, it prevents unnecessary routing during call routing and reduces call setup time, thus reducing the cost of network resource consumption. It can work.

Claims (13)

In the service provider number portability call control method applied to the switching system, A first step of determining, by the calling exchange to which the calling party is connected, a requested number of the portability block number and requesting a routing number to the number portability service controller using an intelligent network protocol message; A second step of searching for a number portability routing database by the number portability service controller that has been requested a routing number; If the routing number corresponding to the called number is the number that has moved to its own network, as a result of the search in the second step, the identification address of the new destination exchange is returned, and if it is not the number that has moved to its own network, it returns the called network address. Three steps; And The originating exchange route to the new destination exchange if the returned address is the identification address of the new destination exchange, and route to the destination network if the returned address is the destination network address; Service provider number portability call control method comprising a. The method of claim 1, The number portability routing database, A mobility number table for indicating a number mobility routing table corresponding to the mobility block number; And The number portability routing table for mapping the routing address per number of the subscriber to be moved, the mobile subscriber's mobility status, number transfer processing time and number information Service provider number portability call control method comprising a. The method of claim 2, The mobility number table, A mobility possibility block number record indicating a station number of the mobile subscriber number; A routing table indicator record indicating a routing address in the number portability routing table; And Operator identifier record indicating network operator Service provider number portability call control method comprising a. The method of claim 2 or 3, The number portability routing table, Called number record indicating the subscriber's telephone number; A routing address record indicating an address to be routed; A number shift status record for identifying a shifted number status; A number shift processing time record indicating a time point at which number portability starts; And Number information record indicating information about the number Service provider number portability call control method comprising a. The method of claim 4, wherein The routing address record is A new called network identification address indicating a new provider network when the telephone subscriber moves to a new provider network; And The new destination exchange identification address, which indicates the new destination exchange, if the telephone subscriber has moved to his or her network. Service provider number portability call control method comprising a. The method of claim 4, wherein The number movement status record, Whether the number has been ported (Port-In), ported out (Port-Out), ported number irrespective of its own network, or moved but the current subscriber is unsubscribed Service provider number portability call control method, characterized in that it indicates a status. In the service provider number portability call control method applied to the switching system, A first step of searching the number portability routing database in the calling network and providing routing information for identifying the new called network to partially route to the new called network; A second step of routing the call routed to the new destination network to search its number portability routing database in the new destination network to the final destination, Each number portability routing database, A mobility number table for indicating a number mobility routing table corresponding to the mobility block number; And The number portability routing table for mapping the routing address per number of the subscriber to be moved, the mobile subscriber's mobility status, number transfer processing time and number information Service provider number portability call control method comprising a. The method of claim 7, wherein The mobility number table, A mobility possibility block number record indicating a station number of the mobile subscriber number; A routing table indicator record indicating a routing address in the number portability routing table; And Operator identifier record indicating network operator Service provider number portability call control method comprising a. The method according to claim 7 or 8, The number portability routing table, Called number record indicating the subscriber's telephone number; A routing address record indicating an address to be routed; A number shift status record for identifying a shifted number status; A number shift processing time record indicating a time point at which number portability starts; And Number information record indicating information about the number Service provider number portability call control method comprising a. The method of claim 9, The routing address record is A new called network identification address indicating a new provider network when the telephone subscriber moves to a new provider network; And The new destination exchange identification address, which indicates the new destination exchange, if the telephone subscriber has moved to his or her network. Service provider number portability call control method comprising a. The method of claim 9, The number movement status record, Whether the number has been ported (Port-In), ported out (Port-Out), ported number irrespective of its own network, or moved but the current subscriber is unsubscribed Service provider number portability call control method, characterized in that it indicates a status. In an exchange system with a large capacity processor, A first function of requesting a routing number to a number portability service controller by using an intelligent network protocol message by determining that a requested number of the originating exchange connected to the originating party is a call of a portability block number; A second function of searching for a number portability routing database by the number portability service controller that has been requested a routing number; As a result of the search in the second function, if the routing number corresponding to the called number is the number that has moved to its own network, the identification address of the new destination exchange is returned, and if it is not the number that has moved to its own network, it returns the called network address. Third function; And A fourth function of routing to the new destination exchange if the returned address is the identification address of the new destination exchange, and routing to the destination network if the returned address is the destination network address; A computer-readable recording medium having recorded thereon a program for realizing this. In an exchange system with a large capacity processor, Number portability routing database, A mobility possibility block number record indicating a station number of the mobile subscriber number; A routing table indicator record indicating a routing address in the number portability routing table; A carrier identifier record indicating a network operator; Called number record indicating the subscriber's telephone number; A routing address record indicating an address to be routed; A number shift status record for identifying a shifted number status; A number shift processing time record indicating a time point at which number portability starts; And Include a number information record indicating information about the number, A first function of searching the number portability routing database in an originating network and providing routing information for identifying a new called network to partially route to the new called network; And A second function of routing a call routed to the new destination network to search its number portability routing database in the new destination network to the final destination; A computer-readable recording medium having recorded thereon a program for realizing this.