KR101504172B1

KR101504172B1 - Method for treating a call of number portability using telephone number mapping and system thereof

Info

Publication number: KR101504172B1
Application number: KR1020080025879A
Authority: KR
Inventors: 안수호; 김영식
Original assignee: 주식회사 케이티
Priority date: 2008-03-20
Filing date: 2008-03-20
Publication date: 2015-03-20
Also published as: KR20090100597A

Abstract

The present invention discloses a number portability call processing method using ENUM and a system thereof. A method for processing a number portability call according to an embodiment of the present invention includes receiving ENUM (Telephone Number Mapping) corresponding to a call number of a call, inquiring the received ENUM through DNS (Domain Name System) Searching for an Internet Protocol (IP) address, and providing the searched IP address to be forwarded to the IP address searched for.

Telephone number mapping (ENUM), DNS,

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing a number portability call using an ENUM,

The present invention relates to a number portability call processing, and more particularly, to a telephone number mapping method for converting a receiving terminal number of a call received by a message server into a telephone number mapping (ENUM) By retrieving the IP address to be processed and transmitting the message call to the retrieved IP address, it is possible to reduce the system load due to the number portability inquiry, reduce the cost of the carrier, and ensure efficient number portability with the VoIP (Voice over Internet Protocol) network The present invention relates to a method for processing a number portability call using an ENUM and a system thereof.

The number portability system is a system in which a subscriber of a communication service can maintain an existing telephone number even if the operator, service location, or service type is changed.

This system aims at minimizing the inconvenience of the users who change the telephone number when the communication service user or the residence of the communication service is changed by making the operator freely choose the telephone number regardless of the telephone number. Local number portability and mobile number portability, among others.

Local telephone number portability refers to the ability of a telephone subscriber to maintain an existing number even if the carrier, service location, or service type is changed.

The concept of mobile number portability is similar to that of the local telephone, but has the characteristic that it can keep only the existing telephone number.

In order to provide mobile number portability, a number portability related system, for example, a number portability inquiry system (NPS) capable of inquiring number portability is required.

A process of inquiring the number portability for a text message call according to the related art will be described as follows.

In the case of a QoR (Query on Release) method, when a SMS message is received by a SMS server, a text message call is transmitted to a third party through an SMS gateway. If the SMS message is not a call to a third party number, After receiving the text message call again, the corresponding text message call is retransmitted using the RD (routing digit) value which is the result value through the number portability inquiry.

Thus, in the case of a short message call according to the related art, even if the text message call is a move call to a third party number, it is transmitted to a third party. Also, the third party receives the corresponding text message call again and inquires the RD value through a number portability database And transmitting the corresponding text message call on the basis of the inquired RD value, unnecessary transmission / reception process occurs, and the processing time of the text message call becomes longer, and unnecessary load is applied to the apparatus for processing the text message call There is an increasing problem.

Then, when a long message message is received in the long message (LMS), an authentication process for the corresponding call is performed. For example, after the JUICE authentication, the number portability is inquired based on the NPDB to receive the RD value. To deliver a long message message.

That is, after performing the terminal authentication process for the long message message call, the number portability is inquired through the NPDB, the RD value for the inquired number portability is received, and the long message message is transmitted to the location corresponding to the RD value.

The number portability call inquiry method according to the related art as described above is based on an interworking system in the m-IDC according to the relocation of the NPS station number of about one to two times a month, a mistake of the operator in each country such as the HLR, the exchange and the FNPS, A potential VOC (Voice of Customer) may arise due to an information error or the like.

In addition, if the third generation (3G) FNR function and the NPS function are operated in the same equipment, if the FNPS (Flexible Number Routing and Number Portability Server) failure occurs, there is a problem that a large failure of the entire voice, message and data service may be caused .

Also, in case of short message overseas roaming, a separate network called S365 is leased to incur additional costs of using the method of processing an international SMS message, and there is a separate cost incurred between the three mobile communication companies for NPDB interworking.

An object of the present invention is to solve the above problems, and it is an object of the present invention to search for a number portability call based on a DNS inquiry using an ENUM so as to obtain a voice of a potential VOC ), And a system therefor.

It is another object of the present invention to provide a method and a system for processing a number portability call using an ENUM which can reduce an unnecessary process for a text message call and reduce a system load.

Another object of the present invention is to provide a method and a system for a number portability call processing using an ENUM, which can reduce leasing cost due to lease of a network when roaming a short message and reduce costs incurred by linking NPDB.

It is still another object of the present invention to provide a method and a system for processing a number portability call using an ENUM that can ensure efficient number portability with a VoIP network.

According to one aspect of the present invention, there is provided a number portability call processing method including receiving an ENUM corresponding to a call number of a call, DNS-querying the received ENUM, and searching for an IP address corresponding to the ENUM And providing the searched IP address so that the call can be delivered to the searched IP address.

At this time, the step of searching for the IP address can search the IP address corresponding to the ENUM based on the database storing the DNS information and the database storing the number portability information.

At this time, the call may be a short message, a long message, or a multimedia message.

According to another aspect of the present invention, there is provided a method for processing a number portability call, comprising the steps of: converting a received number of the call to an ENUM when a call is received; providing the converted ENUM to the DNS; And transmitting the call to the IP address.

At this time, the step of transmitting the call may perform an authentication process for the call, and if the call is authenticated, the call may be delivered to the IP address.

According to one aspect of the present invention, a number portability call processing system includes a number portability database for storing number portability information and a reception number of a call, converting the received number into an ENUM corresponding to the reception number, And a query server for searching for and providing a corresponding IP address.

According to another aspect of the present invention, a number portability call processing system includes a message server, and upon receiving a call, the message server converts the received number of the call into an ENUM corresponding to the received number, Receives the IP address corresponding to the ENUM from the DNS, and delivers the call to the received IP address.

The number portability call processing method using the ENUM and the system of the present invention can search for a number portability call based on a DNS inquiry using an ENUM, thereby reducing potential VOCs that may occur due to an operator's mistake, .

In addition, the present invention reduces unnecessary processes for a text message call and reduces the load on the system.

In addition, the present invention has the effect of reducing leasing cost due to lease of a separate network when roaming a foreign SMS message, and reducing the cost incurred by NPDB interworking.

In addition, the present invention has an effect of ensuring efficient number portability with a VoIP network.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the accompanying drawings.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Hereinafter, a method of processing a number portability call using an ENUM according to an embodiment of the present invention and its system will be described in detail with reference to FIGS. 1 to 5.

ENUM (Telephone Number Mapping) is a protocol that converts E.164 telephone numbers into URI (Uniform Resource Identifier), which is an Internet address system. That is, it uses Domain Name System (DNS) system widely applied to existing IP To allow the E.164 number to be mapped to a URI such as the IP address or email address of the resource associated with the number. In the service aspect, an ENUM service is an ideal concept that enables access to all services by freely providing URIs of various services related to this number in an ENUM server through a single identification number. To access various communication services such as telephone, fax, e-mail and Internet homepage from the telephone network or IP network.

In the present invention, an IP address for processing a text message call is retrieved through interworking with an NPDB through a DNS inquiry using the ENUM as described above, and a text message call is transmitted to the retrieved IP address As shown in FIG.

1 is a diagram illustrating a number portability call processing system using an ENUM according to an embodiment of the present invention.

1, a number portability call processing system diagram includes SMSC 120, LMSC, DNS 130, and NPDB 140.

The SMSC 120 is a short message server. When a short message is received, the SMSC 120 detects the receiving terminal number from the short message call, converts the detected receiving terminal number to ENUM, and transmits the converted ENUM to the DNS 130.

When the SMSC 120 receives an IP address corresponding to the ENUM converted from the receiving terminal number from the DNS 130, the SMSC 120 transmits the received short message to the corresponding IP address.

For example, when the receiving terminal number of the short message call is "010-2345-7890", the SMSC 120 sets the receiving terminal number "010-2345-7890" to ENUM "0.9.8.7.5.4.3.2e164.arpa" And transmits the converted ENUM "0.9.8.7.5.4.3.2e164.arpa" to the DNS 130, thereby receiving the IP address corresponding to the ENUM from the DNS 130. [

Of course, in the case where the IP address provided from the DNS 130 is an IP address of a third-party company, the short message message received by the SMSC 120 is transmitted to the third party device corresponding to the IP address through the SMS gateway, Do.

In the case of the QoR (Query on Release) method for a short message call, the present invention transmits a number portability short message message to a third party through an SMS gateway, Unlike the process of receiving the short message call from another company and processing the short message call through the number portability inquiry after receiving the short message call from the third party, the IP address to process the short message call is received from the DNS 130 It is possible to reduce unnecessary repetitive call processing for the number portability short message call, thereby reducing the load of equipment for processing short message calls.

The LMSC 110 detects the receiving terminal number from the long message message call when the long message message is received, converts the detected receiving terminal number into the ENUM, and transmits the converted ENUM to the DNS 130.

In addition, the LMSC 110, like the SMSC 120, receives the IP address corresponding to the converted ENUM of the receiving terminal number from the DNS 130, and transmits the received long message message to the corresponding IP address.

At this time, the long message service call transmitted from the LMSC 110 to the corresponding IP address may be transmitted to the corresponding IP address after the long message service call is authenticated after the long message service call is authenticated.

As can be seen, the LMSC 110 carries out the authentication process for the long message message, and if the call is authenticated, unlike the conventional technique in which the long message message is routed using the RD value through the number portability inquiry, It is possible to directly route to the corresponding IP address after receiving the IP address from the DNS 130.

The NPDB 140 is a database for storing number portability information, and provides IP information in cooperation with an ENUM database (DB) (not shown). That is, IP information is shared based on the RD value of the NPDB 140 interlocked with the ENUM DB.

When the converted EUNM of the receiving terminal number is received from the SMSC 120 or the LMSC 110, the DNS 130 inquires the IP address corresponding to the received ENUM using the ENUM DB and the NPDB 140, And provides the IP address to the SMSC 120 or the LMSC 110 that has transmitted the ENUM.

That is, the DNS 130 searches for an IP address for a mobile communication company or a corresponding device to process a message call based on the received ENUM, ENUM DB, and NPDB, and provides the IP address to the SMSC 120 or the LMSC 110, To directly forward the message call to the corresponding IP address.

In addition, although not shown, when a multimedia message call is received, a receiving terminal number of a multimedia message call is extracted from a server receiving a multimedia message call, for example, a multimedia message server (MMSC) or an LMSC 110, 130 to provide the IP address from the DNS 130 and directly forward the multimedia message call to the IP address.

Fig. 2 is a system diagram for explaining the operation for a short message call; Fig.

Referring to FIG. 2, when the SMSC 120 receives a short message call, it extracts the receiving terminal number included in the short message call, converts the extracted receiving terminal number to ENUM, and transmits the converted ENUM to the DNS 130.

The DNS 130 receives the ENUM from the SMSC 120 and detects the IP address corresponding to the ENUM received through the associated ENUM DB and the NPDB and provides the detected IP address to the SMSC 120.

Here, the IP address detected by the DNS 130 is a third party device capable of directly receiving a message call when the message call is a mobile call to another party (another mobile communication company), for example, the call processing device 220 And if the message call is a mobile call within the company, it may be an IP address for a device, for example, SGSN, to process a message call within the company.

The SMSC 120 receives the IP address from the DNS 130 and transfers the IP address to the call processing device 220 of the third party through the SMS gateway 210 when the IP address is a third party IP address.

At this time, the call processing apparatus 220 may be a device corresponding to an IP address, or may be a device connecting a company with a third party.

On the other hand, when the IP address provided from the DNS 130 is a device provided in the company, the SMSC 120 directly processes the SMS message by directly transmitting the SMS message to the corresponding device.

As can be seen from this fact, since the short message call is directly transmitted to the IP address provided from the DNS 130, it is possible to provide a call processing method irrespective of the QoR method, thereby reducing the overall system load.

In addition, since the SMS 130 is directly transmitted using the DNS 130, there is no need to lease a separate network when SMS overseas roaming is performed, thereby reducing network rental costs due to overseas SMS roaming.

FIG. 3 is a system diagram for explaining an operation for a long message call; FIG.

3, the LMSC 110 extracts the receiving terminal number included in the long message message call upon receiving the long message message, converts the extracted receiving terminal number to the ENUM, and transmits the converted ENUM to the DNS 130. [

The DNS 130 receives an ENUM from the LMSC 110 and detects an IP address corresponding to the ENUM received through the associated ENUM DB and the NPDB and provides the IP address to the LMSC 110.

In this case, when the long message is a call to another company, it is preferable that the IP address provided from the DNS 130 to the LMSC 110 is an IP address of a device provided in a third party.

The LMSC 110 directly transmits the long message message to the IP address provided from the DNS 130, and the authentication unit 310 takes charge of authentication of the long message message transmitted.

That is, if the authentication is successful and the long message message is a third party mobility call, the authentication unit 310 authenticates the long message message through the Simple Mail Transfer Protocol (SMTP) 330). Of course, the long message message is successfully authenticated, and in the case of its own mobility message, a long message message is delivered to the corresponding device.

Here, the third-party call processing device 330 may be the same device as the call processing device 220 shown in FIG. 2, or may be a different device.

2 and 3, since the number portability call processing system according to the present invention directly transmits a message call to the IP address retrieved by the DNS inquiry, efficient number portability with the VoIP network can be guaranteed .

In addition, the present invention can prevent a large failure because only the DNS IP needs to be changed in each system when an FNPS failure occurs. In case of relocation of a new station number, the NPDB shares DNS and ENUM DB, Therefore, there is an advantage in that it is not necessary to arrange the station number.

4 is a flowchart illustrating an operation of a number portability call processing method using an ENUM according to an embodiment of the present invention.

4, when a message call is received in a message server, for example, a short message server, a long message server, or a multimedia message server, the number portability call processing method extracts a receiving terminal number from the received message call (S410 , S420).

The message server converts the extracted receiving terminal number into ENUM, and transmits the converted ENUM to the DNS (S430, S440).

The DNS receives the converted ENUM, searches for an IP address corresponding to the ENUM based on the ENUM DB and the NPDB to be interworked, and provides the retrieved IP address to the message server (S450, S460).

That is, DNS retrieves the IP address of the device that will process the message call received by the message server based on the ENUM DB and NPDB, and delivers the retrieved IP address to the message server so that it can process the message call directly from the retrieved IP address .

Upon receiving the IP address from the DNS, the message server directly forwards the message call to the received IP address (S470).

At this time, in step S470, the authentication process for the message call can be performed as needed. The following description will be made with reference to FIG.

Upon receiving an IP address for processing a message call from the DNS, the message server performs an authentication process by transmitting a message call to a device that performs authentication of a message call, for example, JUICE (S510).

If the authentication of the message call is successful, the message call is directly transmitted to the corresponding IP address to process the call (steps S520 and S530).

The method and system for handling number portability calls using the ENUM according to the present invention can be modified and applied in various forms within the scope of the technical idea of the present invention and are not limited to the above embodiments. While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. And an equivalent range.

FIG. 5 is a flowchart illustrating an exemplary operation of step S470 shown in FIG.

Description of the Related Art

110: LMSC

120: SMSC

130: DNS

140: NPDB

310:

Claims

Receiving an ENUM corresponding to a received number of a call;

A step of performing DNS lookup of the received ENUM to search for an IP (Internet Protocol) address of a call processing apparatus that processes the call corresponding to the ENUM; And

Providing the searched IP address so that the call can be delivered to the searched IP address

Wherein the number portability call processing method comprises:

The method according to claim 1,

The step of searching for the IP address

Wherein the IP address corresponding to the ENUM is retrieved based on a database storing DNS information and a database storing number portability information.

The method according to claim 1,

The call

A short message, a multimedia message, and a numbered call message.

If the server receives a call, converting the received number of the call to an ENUM if the call is received;

Providing the converted ENUM to DNS;

Receiving an IP address corresponding to the ENUM from the DNS; And

And forwarding the call to the IP address

Wherein the number portability call processing method comprises:

5. The method of claim 4,

The step of delivering the call

Performing an authentication process on the call, and if the call is authenticated, transmitting the call to the IP address.

A number portability database for storing number portability information; And

And a search server for searching for and providing an IP address of a call processing apparatus that processes the call corresponding to the ENUM converted from the number portability database,

The number portability call processing system comprising:

The method according to claim 6,

The inquiry server

Receives the ENUM from one of a short message server, a long message server, and a multimedia message server, and provides the retrieved IP address.

A message server,

The message server

When a call originated from a predetermined terminal is received, converts the received number of the call into an ENUM corresponding to the received number,

Providing the converted ENUM to the DNS, receiving an IP address corresponding to the ENUM from the DNS,

And delivers the call to the IP address received.

9. The method of claim 8,

The number portability call processing system

An authentication unit for receiving the call from the message server and performing authentication for the call, and for forwarding the call to the IP address when the call is authenticated;

Wherein the number portability call processing system further comprises: