KR20010060626A - Method for providing location number portability using signaling message - Google Patents

Abstract

PURPOSE: A method for providing an area code mobility using a signaling message is provided to transceive a call setup signaling message between exchanges during a call setup process using the signaling message, so as to enable an incoming subscriber to decide the mobility. CONSTITUTION: A number of an incoming subscriber(101) is recognized as moved to another area, and an inquiry message for the incoming number as a search key is delivered to an exchange database(103), to receives a location address with a response message. An ISUP release message including the incoming number, an initial incoming number and a number mobility parameter is transmitted to a prior exchange, to release a call. Whether a call is capable of being released to the prior exchanges is decided. If so, the ISUP release message is configured and transmitted to a prior exchange, to release a call. If the release of a call is not possible, an ISUP initial address message including the incoming number, an initial incoming number and a forward call indicator parameter is configured, to rout a call to the next exchange. If call routing is delivered to an incoming exchange(106) of a moved area, the incoming exchange(106) analyzes the incoming number. If a subscriber personal number is '0000', the incoming number is substituted for the initial incoming number, to connect a call with the incoming subscriber(101).

Description

Method for providing location number portability using signaling message

The present invention relates to a method for providing area number portability using a signaling message, and more particularly, a subscriber of his / her telephone in an area where the same number plan (using the same area code) is applied within the same operator using a signaling message. The present invention relates to a method for providing area number portability using a signaling message that enables a user to move a region without changing the number.

In general, the area number portability is increasing in importance as the life culture area expands, such as the development of transportation and the expansion of the realm of living. Currently, area number portability is provided by telecommunications operators only in areas serviced by the same exchange.

In the future, if the regional code widening plan is implemented in Korea, the area code will be widened nationwide. For example, the measures use area code 0415 and Cheonan use area code 0417. When the area code wide area plan is implemented, both cities will use area code 041, which means Chungcheongnam-do.

This will not only increase the mobility of the area beyond the service area of the exchange, but also increase the need for local number portability, which allows the subscriber to use his or her phone number no matter where they are located within the area using the same area code. will be.

In the current telephone network, this problem can be solved based on an exchange by applying Call Forwarding, which is a conventional technology, but it is not preferable because the circuit setup is inefficient.

Therefore, the conventional solution using the call switching function of the exchange has a problem that the total number of two numbers are assigned to one subscriber together with the existing number to the subscribers who moved the area and the circuit setting is inefficient.

Accordingly, the present invention has been made to solve the above problems, the fact that the called subscriber has moved the area by sending and receiving a call setup signal message (ISUP IAM, ISUP REL) during the exchange period during the call setup process using the signal message The purpose of the present invention is to provide a method for providing local number portability using a signaling message to determine a problem, obtain a location address of a destination country of a moved region, and transmit a call to a telephone subscriber who has moved the region to solve the problem.

The present invention for achieving the above object is to use a single subscriber 1 number using the existing number system as it is, a method that can be routed to the destination station in the area where the telephone subscriber moved from the originating station, relay station or intercity exchange station. to provide.

In the present invention, in addition to a telephone number (DN), a location address (LA) for identifying a new switching center of a subscriber who has moved within the communication network in the network is used. Location address is composed of area code + exchange number + special number to use existing numbering system. For example, if a telephone subscriber in Daejeon area (area code 042) moves from a station number to an exchange that uses station number 870, the location address of the new exchange station moved to is 042-870-0000. The four-digit special number may be any other number, but may be designated uniformly at the national level.

The function for providing the area code portability, which is applied to the present invention, is used in the drop-back method, and is installed in the calling station, the relay station, the called station, and the intercity exchange station.

The exchange database applied to the present invention may be used by connecting to the exchange by using a routing table inside the exchange or by installing a separate database.

The call setup message applied in the present invention is an ISDN signaling message to display the area number portability in the ISUP Initial Address Message (IAM: Initiation Number, Initial Call Number, Forward Call Indicator, Number Portability Capability). Parameters are included, and the ISUP Release Message (REL: Release Message) includes a parameter indicating the called number, first called number, number portability indicator, and cause of release.

The present invention for providing number portability with the functions of the above network structure and network element apparatus recognizes that the destination exchange number of the destination subscriber before the movement is a transferred number that has been moved to another area. A first step of receiving a location address searched by a response message when sending a query message with a search key; The exchange constructs an ISUP release message (ISUP REL) that includes the called number, the original called number, and the number portability indicator (which indicates "area mobile number") and sends it to the previous exchange (calling station, relay station, or intercity country). A second step of releasing the call; The previous exchange further determines whether the call can be released to the previous stage exchange, and if possible, releases the call by constructing an ISUP release message and sending it to the immediately preceding stage exchange; Or if the call release is not possible, constructing an ISUP initial address message (ISUP IAM) that includes the called number, the first called number, and the forward call indicator (which indicates "number translated") to route the call to the next exchange. step; When the call routing is delivered to the destination country of the subscriber who moved the area through the above steps, the destination exchange of the moved area analyzes the destination number and, if the subscriber's individual number is 0000, replaces the destination number with the original destination number and sends the call to the called party. Characterized in that it comprises a fifth step of connecting.

1 is a conceptual diagram of a network configuration and area code portability in accordance with the present invention.

2a to 2d are call processing flow diagrams for providing area number portability in accordance with the present invention.

<Explanation of Signs of Major Parts of Drawings>

101: incoming subscriber 102: local destination exchange before moving

103: exchange database 104: local relay station exchange before moving

105: local intercity exchange before the move 106: local destination exchange moved

107: moved regional relay exchange 108: moved regional intercity exchange

109: calling subscriber 110: calling exchange

111: calling party relay exchange 112: calling party long-distance exchange

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention;

1 is a conceptual diagram of a communication network and area code portability according to the present invention, where 101 is a destination subscriber who has moved a region, 102 is a destination exchange where a subscriber originally received a service, and 103 is a routing of a subscriber who has moved a region; Database of exchanges with information, 104 is the transit exchange in the pre-mobile area, 105 is the intercity exchange in the pre-mobile area, 106 is the destination exchange in the area to which the subscriber has moved, 107 is the transit exchange in the area to which the subscriber has moved, and 108 is the moved area 109 denotes an outgoing exchange, 109 denotes an outgoing subscriber as a general telephone user, 110 denotes an outgoing exchange accommodating an outgoing subscriber, 111 an originating relay exchange, and 112 an outgoing intercity exchange.

When the subscriber 101 wants to move the area in the same operator, the area where the same number plan is applied, applies for the area number portability service to the service provider. At this time, the subscriber 101 keeps his original number as it is. Information about the subscriber's regional movement is stored in the exchange database 103.

On the other hand, when the calling party 109 dials to call the destination subscriber 101 who moved the area, the call is transferred to the local destination exchange 102 before moving. The local destination exchange 102 before the transfer detects the fact that the called number is a moved number that has moved the area, and sends a query message with the called number as a search key to the exchange database 103 so that the exchange database 103 is the area code portability. The database is searched and a response message including the location address corresponding to the called number is sent to the local destination exchange 102 before moving.

The local destination exchange 102 before the move then constructs an ISUP release message that includes the called number, the first called number, and the number portability indicator (which indicates "area mobile number") to the previous exchange (104, 105, 110). , 111, 112) to release the call. At this time, the previous exchange receiving the release message determines whether it is possible to release the call to the previous stage again, and if possible, constructs an ISUP release message and sends the call directly to the previous stage exchange (110, 111, 112). If it is not possible to release the call or forward to the previous exchange, construct an ISUP initial address message that includes the called number, the original called number, and the forward call indicator (which indicates "number translated") to the next exchange (106, 107). , 108 possible).

Finally, when the call routing is delivered to the mobile area destination exchange 106 of the subscriber who has moved to the area, the mobile area destination exchange 106 analyzes the destination number, and if the subscriber individual number is 0000, the destination number is the original destination number. The call is connected to the called party 101 by replacing with the call.

2A to 2D are detailed call processing flowcharts of a method for providing local number portability according to the present invention, and include a calling station 110, a relay station 104, 107, 111, a remote station 105, 108, 112, a called station 102, Internal process and transmission / reception message processing flow in step 106).

First, the calling station analyzes the called number dialed by the calling subscriber (S201) and determines whether the called number is its own country number (S202). In this case, if the called party number analyzed as the result of the determination in step S202 is the own country number, the processing for connecting the call to the called subscriber is performed (S203). If the result is not the own country number, the called party number, the first called number, the number. An ISUP message including a mobility capability (indicative of "Drop-Back supported") parameter is configured (S204), and the call is routed to the next exchange (S205).

Then, the called station receives the ISUP initial address message from the previous exchange (S206), and analyzes the called number (S207). Then, it is determined whether the subscriber's individual number of the called number is 0000 (S208). At this time, when the subscriber individual number is 0000, as determined in step S208, since the transferred call is a call of a subscriber who has moved the area, the called number is replaced with the first called number (S209), and the call is connected to the called subscriber (S210).

If it is determined in step S208 that the subscriber's individual number is not 0000, it is checked whether the corresponding exchange supports the area code portability (S211). If the area number portability is not supported as a result of the check in step S211, the subscriber is regarded as a general call. If the call is connected (S210), and the result of the check in step S211 indicates that the area number portability is supported, a query message is configured using the called number as a search key to determine whether the called number is local moved (S212). Is transmitted (S213).

On the other hand, the detailed operation to receive a response message including a location address from the exchange database to be described later (S214), and compares the called number and the first called number to determine whether the number has moved the area (S215), called number Determine whether and the first called number is the same (S216). In this case, if the called party number and the first called number are the same as the result determined in step S216, the caller does not move, so the call is connected to the called subscriber (S216). If the result is not the same, the called number, the first called number, An ISUP release message including a number portability indicator (which indicates "area mobile number") parameter is configured (S217), and the call is released by sending an ISUP release message to the previous exchange (S218).

The exchange database receives a query message from the called station (S219), searches the database using the called number as a search key (S220), and determines whether a search key exists (S221). At this time, if the search key does not exist as a result of the determination in step S211, since it is a number that has not been moved, it is configured as a response message without changing the called number (S222). Change to the searched location address to form a response message (S223), and transmit a response message to the called station (S224).

The relay station or the suburban station receives an ISUP signal message from a previous exchange (S225), analyzes the received ISUP signal message (S226), and determines whether the received message is an ISUP initial address message (S227). In this case, if the result of the determination in step S227 is the ISUP initial address message, the call is routed to the next exchange according to a general call processing procedure (S228). If the determination is not an ISUP initial address message, the received message is an ISUP release message, so the region is moved. Corresponds to one subscriber's call. That is, by analyzing whether the call can be released to the previous exchange for efficient circuit setting (S229), it is determined whether the call can be released (S230).

If it is determined in step S230 that the call can be released, an ISUP release message including the called number, the first called number, and the number portability indicator (indicating the "local mobile number") parameter is configured (S231). To release (S232). If it is determined in step S230 that call release is not possible, an ISUP initial address message including a called number, an original called number, and a forward call indicator (indicative of "number translated") is configured (S233). Route the call (S234).

The present invention as described above allows the subscriber to move the area in the same operator, the area where the same number plan is applied without changing their phone number, using the existing number system as is 1 subscriber 1 number By providing a way for the calling subscriber from the originating station, relay station or intercity exchange to be routed to the destination country in which the subscriber has moved, the subscribers can reduce the various promotional costs associated with the change of number and the additional access costs due to the user's dialing. It can reduce the number and increase the convenience of using the number.

In addition, preferred embodiments of the present invention are disclosed for the purpose of illustration, those skilled in the art will be able to various modifications, changes, additions, etc. within the spirit and scope of the present invention, such modifications and modifications belong to the following claims You will have to look.

Claims (3)

Recognizing that the number of the called subscriber is a moved number moved to another area, and receiving a location address found in the response message when sending a query message with the called number as a search key to the exchange database; A second step of releasing the call by constructing an ISUP release message (ISUP REL) including the called number, the first called number, and the number portability indicator parameter and transmitting it to a previous exchange after performing the first step; A third step of determining whether the call can be released to the previous step exchange after receiving the release message in the second step; A fourth step of releasing the call by constructing an ISUP release message and transmitting the message to the previous stage exchange when the call can be released as determined in the third step; A fifth step of routing the call to the next exchange by constructing an ISUP initial address message (ISUP IAM) including the called number, the first called number, and the forward call indicator parameters when the call release is not possible as determined in the third step. ; And When call routing is delivered to the destination country of the subscriber who moved the area through the fifth step, the destination exchange of the moved area analyzes the destination number, and if the subscriber's individual number is 0000, the destination number is replaced by the original destination number. A method for providing area number portability using a signaling message, comprising a sixth step of connecting a call. The method of claim 1, Call release in the second and fourth steps A method for providing local number portability using a signaling message, which is performed using an ISUP release message (ISUP REL) including a called number, an original called number, a number portability indicator, and a parameter indicating a release cause. The method of claim 1, Call routing in the fifth step, A method of providing local number portability using a signaling message, which is performed using an ISUP initial address message (ISUP IAM) including a called number, an original called number, a forward call indicator, and a number indicating a portability capability.