KR100204054B1 - Telephone number mobile service method in use intelligent network - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

Method of providing phone number portability using intelligent network.

2. The technical problem to be solved by the invention

Provides the method of providing number portability to the telephone number which changed the service provider using the same processing procedure as the intelligent network service.

3. Summary of Solution to Invention

The subscriber can freely move the service provider without changing his / her phone number, but uses the existing numbering system to use 1 subscriber 1 number, so that the subscriber can be routed from the calling party to the new destination. For this purpose, the number portability is provided by using the location address to identify the new switching center of the subscriber who has shifted the number in the network in addition to the telephone number. Location address is composed of area code + exchange number + special number to use existing numbering system.

4. Important uses of the invention

Used at the exchange.

Description

How to provide phone number portability using intelligent network

The present invention relates to a method for providing number portability that enables a subscriber to move a carrier freely without changing his / her phone number using intelligent network technology.

Number portability is essential for multiple operators to compete fairly in the local telephone service market. In general, local telephone operators trying to enter a new market have considerable difficulty attracting subscribers from existing monopolies. This is because the subscriber's telephone number needs to be changed. New operators should be assigned a new station number by the authorities and provide their number. Therefore, unless you are the first subscriber to call, only those subscribers who are ready to give up their new phone numbers and are ready to receive new ones will move to the new operator. Business subscribers, in particular, are already paying huge advertising costs to promote their phone numbers, so even if a new carrier charges a low price, they don't want to move the subscription phone.

The problem of number portability between local carriers to which the present invention is applied will be an issue when a second local telephone operator emerges in Korea. In the current telephone network, this problem can be solved based on an exchange by applying call forwarding corresponding to the prior art, but it cannot be seen as a preferable method.

The conventional solution by the exchange requires that a new telephone number be assigned to the subscriber who once moved, so that a total of two numbers are tied to one subscriber together with the existing number, and that all calls are once routed to an existing exchange and then to a new exchange. There are many drawbacks, including rooting inefficiency, additional services, and difficulty in billing.

In order to solve the above problems, the present invention uses the intelligent network structure that separates communication service processing information from the exchange into a centralized database system and performs call processing. The purpose is to provide a number portability providing method for solving the problem.

1 is a conceptual diagram of the configuration and number portability of a communication network according to the present invention;

2A and 2B are call processing flow diagrams for providing phone number portability in accordance with the present invention.

The solution by the intelligent network proposed in the present invention is to use the 1 subscriber 1 number using the existing number system as it is, to provide a method that can be routed from the originating station to a new destination, and various intelligent network additional services and businesses outside the city Do not cause problems with the settlement of the billing.

In the present invention, a location address (LA) is used to identify a new switching center of a subscriber who has moved a number in a communication network in addition to a directory number (DN). Location address is composed of area code + exchange number + special number to use existing numbering system. For example, if a new city operator is assigned 865 stations as a new station number in the Daejeon area (area code 042), the location address of the new station number is 042-865-0000. The four-digit special number may be any other number, but may be assigned uniformly at the national level.

The intelligent network (IN) applied to the present invention conforms to the ITU-T IN CS-1 (Capability Set 1) standard. The core devices that make up the intelligent network are Service Switching Point (SSP) and Service Control Point (SCP). The service exchanger is located at a single station or a relay station and is connected to the service control apparatus by a common line signal network. The service exchanger recognizes the intelligent network service call and makes an inquiry message and sends it to the service control device. The service control device has the information of the intelligent network service subscribers. When the query message arrives, the service exchanger retrieves the relevant subscriber information and performs the necessary processing and responds to the result. Make it a message. Upon receiving the response message from the service control device, the service exchange continues the call processing according to the content.

According to the present invention for providing number portability according to the above-described intelligent network structure and service processing method, in the telephone number portability providing method using the intelligent network, the calling party service exchanger analyzes the number dialed by the caller and sends the call to the number portability switching center. A first step of making a query message if the call is transmitted to a service control system having a number portability database embedded therein; The service control system searching for a number portability database using a called number included in the query message as a search key, and generating a response message including a searched location address and transmitting the generated response message to a service exchanger; A third step of receiving the response message, wherein the service exchanger generates an ISDN signaling message for call routing and transmits it to the next service exchange unless it is a final destination exchange; And a fourth step of performing the incoming call to the number dialed by the caller if the last call exchanger is the last call exchanger.

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

1 is a conceptual diagram illustrating the configuration and number portability of a communication network according to the present invention, 101 is a subscriber who changes a local telephone operator, 102 is a switch of a previous operator to which the subscriber originally received the service, and 103 is a new subscriber that is moved to a new number. An operator's switch, 104 denotes a caller as a general telephone user, 105 denotes a calling party service exchange, and 106 denotes a number portability service control device.

The subscriber 101 who wants to receive the number portability stops the service provider from the existing service provider 102 and newly subscribes to the local service service to the new service provider 103. At this time, the subscriber 101 keeps his original phone number. Information about the number portability of the subscriber is stored in the database of the service control device 106 providing the number portability by the national number portability management center.

When the caller 104 dials to call the subscriber who has shifted the number, the calling party service exchanger 105 loads the dialed number in a query message and transmits it to the service control device 106. The service control device 106 retrieves the database corresponding to the telephone number versus location address and extracts the location address of the new operator exchange 103. The extracted location address is transmitted to the service exchanger 105 in a response message, and the service exchanger 105 transfers the call to the new operator exchange 103 instead of the existing operator exchange 102 using this information.

2A and 2B are detailed call processing flow diagrams of a method for providing phone number portability according to the present invention, and show internal processing and transmission / reception message processing flows at the service exchanger 105, the service control device 106, and the destination exchange 103; .

First, the service exchange collects a dial number for an originating call (201) and determines whether the call is received at an exchange that provides number portability using a basic call state model (BCSM). (202). It uses the trigger detection point (TDP) of the intelligent network. The scope of the trigger is the office based criteria, and the detection point (DP) is the analysis_information DP. The condition in is a specific digit string. The specific digit string consists of the area code plus the exchange number and follows the national public network numbering system. The trigger condition value lists all telephone numbers for which number portability is provided nationwide. If a number portability is provided at a time throughout the country, zero digits are specified because they apply to all calls.

Once it is determined that the call is for number portability, the service exchange creates an inquiry message to send to the service control system (203). The query message is applied with the Intelligent Network Application Protocol (INAP) according to the common line signaling method. The query INAP message is transmitted to the service control device by using an initial DP operation (InitialDP Operation) (204).

Upon receiving the query message (205), the service control device analyzes the service key parameter of the initial detection operation to determine that the corresponding INAP message is related to the number portability, and then processes the number portability application program (step 1). 206).

The number portability application program searches the number portability database using the value of the called party number parameter of the initial detection operation as a search key (207). The number portability database stores the location address corresponding to the called number. The search result 208 is made into a response message, which uses a Connect operation or a Continue operation. As a result of the search, if the corresponding key exists, the number is shifted, and the location address value is stored in the destinationRoutingAddress parameter of the connection operation, and the original dialed destination number is stored in the originalCalledPartyID parameter (209). If the corresponding key does not exist, the number has not been moved, and thus a continuous operation for continuing the call processing without a parameter is used (210). The response message is sent to the service exchange (211).

The service exchange receives the response INAP message from the service control device and continues the call processing (212). If the called party number parameter value stored in the response message is the same as its own location information (213), if the same, the called party is a subscriber connected to the called party and the incoming call process is performed. If it is not the same, the necessary information of the information contained in the INAP message is stored in the ISUP message (214) so that the ported number is routed to the connected exchange (215).

In the initial address message (IAM) of the ISUP, the called number parameter and the first called number parameter of the INAP in which the location address is stored are stored as corresponding parameters. Indicate the number translated in the forward call indicator parameter of the IAM to prevent the possibility of reprocessing requests from intermediate stations arriving back to the called party when receiving number portability. do. It uses one bit of the reserved bits (bit M-P) for national use.

During call routing using ISUP IAM, other intelligent network services may be triggered for the call. In the initial detection operation of the INAP message created at this time, the parameters of ISUP IAM are applied to the called number, first called number, and forward call indicator parameters.

The relay or terminating exchange receives the ISUP IAM (216) and determines whether the location address included in the called number parameter is the same as its own location address (217). If they do not match, the next exchange routes the call (218), and if it is the same, selects and connects the subscriber (220) using the number stored in the original called number parameter instead of the address in the called number (219).

Table 1 and Table 2 are parameter diagrams of the INAP message to which the present invention is applied, and show initial sensing operations and connection operations, respectively.

The caller's number parameter value of the initial operation is the number dialed by the caller, the caller's number parameter value of the connection operation is the location address indicating the new operator's switch of the called party and the caller's number parameter value is the number dialed by the caller.

Table 3 is a parameter diagram of an ISUP message to which the present invention is applied and shows an initial connection message.

The called party parameter value of the initial connection message is a location address indicating the new operator exchange of the called party and the original called party parameter value is the number dialed by the caller. A specific bit of the forward call indicator parameter indicates that the number has been translated.

The present invention described above is capable of various substitutions, modifications, and changes within the scope without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains, and thus is limited to the above-described embodiments and drawings. It is not.

Initial detection operation parameter Remarks Service Key Input Digit Calling Number Calling Number Calling Number Group Calling Group Calling Address Address Gapping Detection IPSSP Capability IP Available Location Number Other Caller Number First Caller Number Service Profile Identifier Network Type Trigger Type Additional Layer Compatibility Service Interaction Indicator Additional Calling Number Forward Caller Bearer Capability BCSM Event Type Call Transfer Call Number Call Extension Number portability required Number portability and related Number portability

Connect operation parameter Remarks Calling Routing Address Calling Type Correlation Number Deletion and Attach Forward Condition ISDN Access Information Initial Calling Number Root List SCF Number Moving Class Marking Service Provider Interaction Indicator Calling Code Calling Call Calling Calling Number Calling Extension Number portability and related Number portability and related

Initial connection message parameter Remarks Message Type Connection Properties Indicator Forward Call Indicator Calling Party Type Transmission Media Requirements Incoming Number Relay Network Selection Call Reference Outgoing Number Optional Forward Call Indicator Switching Number Switching Information Closing User Group Password Connection Request Initial Calling Number User-User Information Access Forwarding User Service Information User-User Indicator Generic Number Forwarding Delay Counter User Service Information Prime Network Specific Device Generic Digit ISC Dot Code User Tele Service Information Remote Operation Parameter Compatibility Information Generic Notification Service Initiation Generic Reference FSSMLPP Advanced Transmission Media Requirements Frame Location Number Forward GVNS Reroot Indicator Selection Parameter Termination Related to Number Portability Related to Number Portability Related to Number Portability

The present invention as described above allows the subscriber to move the carrier freely without changing his or her telephone number, using the existing number system as it is to use 1 subscriber 1 number, routing from the originating station to the new destination It provides a way to be possible, and prevents problems in settlement of various intelligent network services and out-of-town operators.

Claims (4)

In the telephone number portability providing method using an intelligent network, A first step in which the calling party service exchanger analyzes the dialed number and makes a query message and sends it to the service control system in which the number portability database is embedded if it is a call that reaches the number portability switching center; The service control system searching for a number portability database using a called number included in the query message as a search key, and generating a response message including a searched location address and transmitting the generated response message to a service exchanger; A third step of receiving the response message, wherein the service exchanger generates an ISDN signaling message for call routing and transmits it to the next service exchange unless it is a final destination exchange; And And a fourth step of performing a call to the number dialed by the caller if the caller is the last call exchanger. The method of claim 1, The query message in the first step, A method for providing port number portability, comprising the use of an initial detection point operation, which is an intelligent network application protocol message including a called number, first called number, and forward indicator. The method of claim 1, The response message of the second step, A method for providing port number portability, characterized in that it is configured using a connection operation or a continuous operation, which is an intelligent network application protocol message including a called routing address and an original called number. The method of claim 1, Call routing in the third step, A method for providing port number portability, which is performed using an initial address message, which is an ISDN message including a called number, an original called number, and a forward indicator.