KR20090100597A - Method for treating a call of number portability using telephone number mapping and system thereof - Google Patents

Abstract

PURPOSE: A method for processing a number portability call by using an ENUM and a system thereof are provided to reduce the potential VOC which may be generated by a mistake of a worker or erroneous telephone exchange numbers by inquiring the number portability call based on the DNS inquiry using the ENUM. CONSTITUTION: A method for processing a number portability call by using an ENUM comprises the following steps of: receiving the ENUM corresponding to a phone number to which a call is transmitted; searching an IP(Internet Protocol) address corresponding to the received ENUM through the DNS inquiry(S450); and then providing the searched IP address to which the call will be transmitted(S460).

Description

METHODE FOR TREATING A CALL OF NUMBER PORTABILITY USING TELEPHONE NUMBER MAPPING AND SYSTEM THEREOF}

The present invention relates to number portability call processing, and more particularly, converts a terminal number of a call received by a message server into telephone number mapping (ENUM), and converts a message call through DNS lookup by interworking with a number portability database. By retrieving the IP address to be processed and forwarding the message call to the retrieved IP address, it can reduce the system load due to number portability call lookup, reduce the operator's cost, and ensure efficient number portability with Voice over Internet Protocol (VoIP) network. The present invention relates to a number portability call processing method using ENUM and a system thereof.

The number portability system refers to a system that allows a subscriber to maintain an existing phone number even if the subscriber of the telecommunication service service provider, service location, and service type are changed.

This system allows users of telecommunication service to freely select operators regardless of phone number, to promote competition among operators, and to minimize the inconvenience of users who change their telephone number when changing their carrier or residence. Introduced are local number portability and mobile number portability.

Local telephone number portability refers to a function that allows a subscriber to maintain an existing number even if the subscriber changes the service provider, service location, or service type.

Mobile phone number The concept of portability is similar to that of local telephone, but it has the characteristic that only existing phone number can be maintained.

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.

Referring to the process of querying the number portability for the text message call according to the prior art as follows.

First, in the short message (SMS), when the SMS server receives the text message call, the SMS server sends the text message call to the third party via the SMS gateway, and if it is not a mobile call to the third party number, After receiving the text message call again, the text message call is retransmitted using the routing digit (RD) value, which is a result of the number portability inquiry.

As described above, the short message call according to the prior art transmits a text message call to a third party even when the text message call is a mobile call to its own number, and receives the corresponding text message call again from the third party to inquire the RD value through the NPDB query. Because it performs both the process of transmitting the corresponding text message call based on the RD value and the inquired RD value, unnecessary transmission / reception process occurs, so that the text message call processing time is long, and unnecessary load is placed on the equipment that processes the text message call. There is a growing problem.

Next, in the long message (LMS), when the long message is received, the authentication process for the call is performed. For example, after JUICE authentication, the number portability is inquired based on the NPDB, and the received RD value is received. Forward the long message call using.

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

Number portability call query method according to the prior art as described above, the operator's mistake, station number in each country, such as interlocking system in m-IDC and HLR, exchanger and FNPS according to the relocation of NPS station number once or twice a month Potential Voice of Customer (VOC) may occur due to information errors.

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

In addition, in the case of roaming short messages overseas, there is a problem in that an additional cost is incurred by using a method of processing an international short message by renting a separate network called S365, and a separate cost is generated between three mobile communication companies for NPDB interworking.

An object of the present invention is to solve the above problems, by querying the number portability call based on the DNS lookup using ENUM, potential VOC (Voice of Customer) that can occur due to worker mistakes and station information error, etc. To provide a number portability call processing method and system using ENUM that can be reduced).

Another object of the present invention is to provide a number portability call processing method and system using ENUM which can reduce unnecessary processes for text message calls and reduce the load on the system.

Another object of the present invention is to provide a number portability call processing method and system using ENUM that can reduce the rental cost of a separate network lease when roaming a short message overseas, and the cost generated by NPDB interworking.

Another object of the present invention is to provide a number portability call processing method and system using ENUM capable of ensuring efficient number portability with a VoIP network.

In order to achieve the above object, a number portability call processing method according to an aspect of the present invention comprises the steps of: receiving an ENUM corresponding to a received number of a call; searching the received ENUM by DNS to search for an IP address corresponding to the ENUM And providing the retrieved IP address so that the call can be forwarded to the retrieved IP address.

In this case, the searching of the IP address may search for an IP address corresponding to the ENUM based on a database storing DNS information and a database storing number portability information.

In this case, the call may be one of a short message, a long message and a multimedia message.

Number portability call processing method according to another aspect of the present invention comprises the steps of: converting the received number of the call to ENUM when the call is received, providing the converted ENUM to DNS, the IP address corresponding to the ENUM from the DNS Receiving and forwarding the call to the IP address.

In this case, the step of transmitting the call may perform an authentication process for the call, and if the call is authenticated, may transmit the call to the IP address.

A number portability call processing system according to an aspect of the present invention receives a number portability database storing number portability information and a received number of a call, converts the received number to an ENUM corresponding to the received number, and converts the number portability database to the ENUM converted from the number portability database. And an inquiry server for searching for and providing a corresponding IP address.

A number portability call processing system according to another aspect of the present invention includes a message server, wherein the message server converts the received number of the call into an ENUM corresponding to the received number when a call is received, and converts the converted ENUM into a DNS. And receiving an IP address corresponding to the ENUM from the DNS, and forwarding the call to the received IP address.

Number portability call processing method and system using the ENUM of the present invention, by querying the number portability call based on the DNS lookup using ENUM, the effect that can reduce the potential VOC that can occur due to worker mistakes and station information error, etc. There is.

In addition, the present invention has the effect of reducing unnecessary processes for text message calls and reducing the load on the system.

In addition, the present invention has the effect of reducing the rental cost of the separate network lease when the short message roaming, and the cost incurred by NPDB interworking.

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

Other objects and features of the present invention in addition to the above object will be apparent from the description of the embodiments with reference to the accompanying drawings.

In describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

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

Telephone Number Mapping (ENUM) is a protocol that converts E.164 phone numbers into Uniform Resource Identifiers (URIs), an Internet address system, that is, the Domain Name System (DNS) scheme, which is widely applied to existing Internet Protocol (IP) networks. A mechanism that allows mapping of an E.164 number to a URI, such as an IP address or email address, of a resource associated with that number. In terms of services, the ENUM service provides an E.164 phone number, which is an ideal concept that enables access to all services by freely providing the URIs of the various services associated with this number in the ENUM server through a single identification number. Through the phone or IP network to access a variety of communication services such as telephone, fax, e-mail and the Internet homepage.

The present invention searches for an IP address to process a text message call through the DNS query using ENUM as described above through linkage with NPDB, and an IP address for searching a text message call to process the text message call from the searched IP address. The main point is to deliver directly.

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

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

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

In addition, when the SMSC 120 receives an IP address corresponding to the converted ENUM of the receiving terminal number from the DNS 130, the SMSC 120 transmits the received short message call to the corresponding IP address.

For example, the SMSC 120 converts the receiving terminal number "010-2345-7890" to the ENUM "0.9.8.7.5.4.3.2e164.arpa" when the receiving terminal number of the short message call is "010-2345-7890". By converting and transmitting the converted ENUM "0.9.8.7.5.4.3.2e164.arpa" to DNS 130, an IP address corresponding to the corresponding ENUM is provided from DNS 130.

Of course, if the IP address provided by the SMSC 120 is a third party IP address, the short message received by the SMSC 120 is transmitted to the third party device corresponding to the IP address through the SMS gateway. Do.

As can be seen in the short message call processing according to the present invention, the present invention transmits a number portability short message call to a third party through an SMS gateway in the case of a QoR (Query on Release) method for a short message call in the prior art, and Unlike the process of receiving a short message call from a third party and processing the short message call through a number portability query, if the call is not transferred to a number, the IP address to process the short message call is provided from the DNS 130. It is possible to reduce unnecessary call processing process for number portability short message calls, thereby reducing the load on equipment for short message call processing.

The LMSC 110 is a long message server, and when a long message is received, the LMSC 110 detects a receiving terminal number from the long message and converts the detected receiving terminal number into an ENUM to be transmitted to the DNS 130.

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

In this case, the long message message transmitted from the LMSC 110 to the corresponding IP address may transmit the long message message to the corresponding IP address after performing the authentication process for the long message message.

As can be seen, the LMSC 110 corresponds to ENUM, unlike the prior art of performing the authentication process for the long message call and routing the long message call using the RD value through the number portability query when the call is authenticated. After receiving the IP address from the DNS 130 can be directly routed to the IP address.

The NPDB 140 is a database that stores number portability information. The NPDB 140 interworks with an ENUM database (DB) (not shown) to provide IP information. That is, IP information is shared based on the RD value of the NPDB 140 linked to the ENUM DB.

When the DNS 130 receives the converted EUNM of the receiving terminal number 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 inquires. The IP address is provided to the SMSC 120 or the LMSC 110 having transmitted the ENUM.

That is, the DNS 130 retrieves the IP address of the mobile carrier or the corresponding equipment to process the message call based on the received ENUM, ENUM DB and NPDB, and provides the message server to the SMSC 120 or the LMSC 110, thereby providing a message server. Forwards the message call directly to the IP address.

In addition, although not shown, when a multimedia message call is received, a server receiving the multimedia message call, for example, a multimedia message server (MMSC) or LMSC 110 extracts the receiving terminal number of the multimedia message call and converts it to ENUM and then DNS ( 130), those skilled in the art should be able to recognize that the IP address is provided from DNS 130 and directly forwards the multimedia message call to the IP address.

2 is a system diagram for explaining an operation for a short message call.

Referring to FIG. 2, when the SMSC 120 receives the short message call, the SMSC 120 extracts the receiving terminal number included in the short message call, converts the extracted receiving terminal number into ENUM, and transfers the received terminal number to the DNS 130.

The DNS 130 receives the ENUM from the SMSC 120, detects an IP address corresponding to the received ENUM through the interworking ENUM DB and the NPDB, and provides the same 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 a third party (another mobile carrier), for example, the call processing device 220 illustrated in FIG. 2. ), And if the message call is a mobile call within the company, it may be an IP address for a device for processing a message call within the company, for example, SGSN.

The SMSC 120 receives the IP address from the DNS 130 and transmits the IP address to the call processing device 220 of the third party through the SMS gateway (G / W) 210 when the IP address is the IP address of the third party.

In this case, the call processing device 220 may be a device corresponding to the IP address, or may be a device connecting the company and the third party.

On the other hand, the SMSC 120 processes a short message call by directly transmitting a short message call to the corresponding device when the IP address provided from the DNS 130 is provided to the 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) can provide a call processing method irrespective of the QoR method can reduce the overall system load.

In addition, since the SMS 130 directly delivers the SMS, there is no need to rent a separate network when SMS roaming, and thus, there is an advantage of reducing network rental costs due to overseas SMS roaming.

3 is a system diagram for explaining an operation on a palm message call.

Referring to FIG. 3, when the LMSC 110 receives the long message, the LMSC 110 extracts the receiving terminal number included in the long message and converts the extracted receiving terminal number to ENUM to transfer it to the DNS 130.

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

In this case, when the long message is a call to a third party, the IP address provided from the DNS 130 to the LMSC 110 is preferably an IP address for a device provided in the 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 is responsible for authenticating the long message message.

That is, the authentication unit 310 performs authentication of the long message, and if the authentication is successful and the long message is a third party mobility call, the long message is transmitted through a third party call processing device (SMTP) 320 (SMP). 330). Of course, the authentication of the long message call is successful, and in the case of the company's mobility call, the long message is sent to the corresponding equipment of the company.

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

As can be seen through the operation of Figures 2 and 3, the number portability call processing system according to the present invention can directly transfer the message call to the IP address retrieved by DNS lookup can ensure efficient number portability with the VoIP network .

In addition, the present invention can prevent large failures because only the DNS IP in each system needs to be changed when FNPS failure occurs, and when relocating a new station number, only the corresponding station number information is input to the NPDB because NPDB shares DNS and ENUM DB. There is an advantage that does not need to arrange the station number.

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

Referring to FIG. 4, when a message call is received by any one of a message server, for example, a short message server, a long message server, and 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 recipient terminal number to ENUM, and transfers the converted ENUM to DNS (S430 and S440).

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

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

When the message server receives the IP address from the DNS, the message server directly transfers the message call to the received IP address (S470).

At this time, step S470 can perform the authentication process for the message call as needed, this will be described with reference to FIG.

When the message server receives an IP address for processing a message call from the DNS, the message server transfers the message call to a device that performs authentication of the message call, for example, JUICE (S510).

The authentication process determines whether the authentication of the message call is successful, and if the authentication of the message call is successful, the message call is directly transmitted to the corresponding IP address so as to process the call (S520 and S530).

The number portability call processing method and system using 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. In addition, the embodiments and drawings are merely for the purpose of describing the contents of the invention in detail, not intended to limit the scope of the technical idea of the invention, the present invention described above is common knowledge in the technical field to which the present invention belongs As those skilled in the art can have various substitutions, modifications, and changes without departing from the spirit of the present invention, it is not limited to the embodiments and the accompanying drawings. And should be judged to include equality.

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

2 is a system diagram for explaining an operation for a short message call.

3 is a system diagram for explaining an operation on a palm message call.

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

FIG. 5 is a flowchart illustrating an embodiment of operation S470 of FIG. 4.

<Explanation of symbols for the main parts of the drawings>

110: LMSC

120: SMSC

130: DNS

140: NPDB

310: authentication unit

Claims (9)

Receiving an ENUM corresponding to the received number of the call; DNS lookup of the received ENUM to search for an IP address corresponding to the ENUM; And Providing the retrieved IP address so that the call can be forwarded to the retrieved IP address Number portability call processing method comprising a. The method of claim 1, Searching for the IP address And retrieving an IP address corresponding to the ENUM based on a database storing DNS information and a database storing number portability information. The method of claim 1, The arc is And a call message is one of a short message, a long message, and a multimedia message. Converting the received number of the call to ENUM when a call is received; Providing the converted ENUM to DNS; Receiving an IP address corresponding to the ENUM from the DNS; And Forwarding the call to the IP address Number portability call processing method comprising a. The method of claim 4, wherein Forwarding the call Performing an authentication process for the call, and transmitting the call to the IP address when the call is authenticated. A number portability database for storing number portability information; And Receiving number of the call received and converted to the ENUM corresponding to the received number, the inquiry server for searching and providing the IP address corresponding to the converted ENUM from the number portability database Number portability call processing system comprising a. The method of claim 6, The query server Receiving the ENUM from any one of a short message server, a long message server and a multimedia message server and providing the retrieved IP address. Includes a message server, The message server When a call is received, converts the received number of the call into an ENUM corresponding to the received number, Providing the converted ENUM to a DNS to receive an IP address corresponding to the ENUM from the DNS, And forward the call to the received IP address. The method of claim 8, The number portability call processing system The authentication unit receives the call from the message server, performs an authentication process for the call, and transmits the call to the IP address when the call is authenticated. The number portability call processing system further comprising.

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