KR20050050796A - Apparatus and method for providing user mobility of sip phone - Google Patents

Abstract

The present invention relates to an apparatus and method for providing user mobility of a SIP phone.

A device for providing user mobility of a SIP phone according to an aspect of the present invention, for a SIP phone configured to provide a SIP-based call service for a fixed SIP identifier, a SIP phone agent identifies mobile user access to the SIP phone and Location registration of the SIP phone is performed using the SIP identifier of the accessed user, and the SIP proxy server manages the location information of the SIP phone, and the mobile user can receive the SIP-based call forwarding and origination service to the SIP phone. The SIP identifier of the SIP message transmitted and received by the SIP phone is converted and transmitted.

This allows the SIP phone to perform SIP-based mobile multimedia services to any user with mobility in the ubiquitous computing environment without user intervention.

Description

Apparatus and method for providing user mobility of SPI phone {APPARATUS AND METHOD FOR PROVIDING USER MOBILITY OF SIP PHONE}

The present invention relates to an apparatus and method for providing user mobility of a SIP phone, and more particularly, to an apparatus and method for providing user mobility for enabling a SIP phone to perform a SIP-based mobile multimedia service for an arbitrary mobile user in a ubiquitous computing service environment. It is about.

Session Initiation Protocol (SIP) is a text-based protocol such as HTTP (Hypertxt Transfer Protocol). It is currently used for call set-up in various fields including Internet telephony. It provides a function to enable voice call and multimedia service anytime, anywhere by using URI Uniform Resource Identifier (URI).

SIP-based mobile multimedia services provide a consistent service regardless of the user's physical location or the terminal using the user's SIP identifier (SIP URI).

Since a SIP phone such as a conventional landline telephone provides a SIP-based call service through a VoIP (Voice over Internet Protocol) gateway for a fixed SIP identifier configured at the first time of operation, an arbitrary mobile user accesses a SIP-based SIP In order to receive the mobile multimedia service, the user has to intentionally intervene and set up a new SIP identifier of the SIP phone, and then restart the SIP phone.

The present invention is to solve the above problems, an object of the present invention is a device and method for providing user mobility of a SIP phone to enable a SIP phone to perform a SIP-based mobile multimedia service to any mobile user in a ubiquitous computing environment Is to provide.

In order to achieve the above object, in the present invention, a SIP phone configured to provide a SIP-based call service for a fixed SIP identifier provides user mobility of a SIP phone so that a SIP-based mobile multimedia service can be provided to any mobile user. An apparatus and method are provided.

An apparatus for providing user mobility of a SIP phone according to an aspect of the present invention, includes: a SIP phone agent for identifying any user access to a SIP phone and performing location registration of the SIP phone with the SIP identifier of the accessed user; And a SIP proxy server for managing location information of the SIP phone and converting a SIP identifier of a SIP message transmitted and received to the SIP phone.

The SIP phone may be assigned with a fixed SIP identifier during initial operation, perform location registration through the VoIP gateway, and receive a SIP-based call service with the fixed SIP identifier after the location registration.

The SIP phone agent may include: a user access detection interface unit for interfacing with a mobile user's identification card or identification card to detect any mobile user access to the SIP phone; A SIP identifier determination unit for determining a SIP identifier of a user detected from the user access detection interface unit; And a SIP phone location register that generates a SIP registration message using the detected SIP identifier of the user and periodically performs location registration of the SIP phone while the mobile user's access is detected.

The SIP phone location registration unit sets the SIP registration message by setting the SIP identifier of the mobile user and the preset physical contact address of the SIP phone in the To header and the Contact header of the SIP message, respectively. It is characterized by generating.

And the SIP proxy server manages the location registration information of the SIP phone and uses the location registration information for the SIP message received with the SIP identifier of the mobile user while the registration information of the SIP phone is valid. Converts the SIP identifier of the mobile user corresponding to the Request-URI (Uniform Resource Identifier) of the message and the To header or From header into a fixed SIP identifier of the SIP phone, and transmits the location registration information for the SIP message generated from the SIP phone. The fixed SIP identifier of the SIP phone corresponding to the From header or the To header of the SIP message is converted into the SIP identifier of the mobile user and transmitted.

According to another aspect of the present invention, a method for providing user mobility of a SIP phone includes: a) performing SIP location registration through the VoIP gateway with a predetermined fixed SIP identifier; b) if a mobile user's access to the SIP phone is detected, performing location registration with a SIP identifier corresponding to the mobile user; And c) providing a SIP-based mobile multimedia service to the mobile phone through the SIP identifier conversion of the SIP message transmitted and received to the SIP phone using the location registration information of the SIP phone.

And the step a) comprises: i) receiving a SIP registration message generated using a fixed SIP identifier preset at the time of initial driving of the SIP phone and a physical contact address of the SIP phone; And ii) generating registration information of the SIP phone through the received SIP registration message.

In step b), when the access of the mobile user to the SIP phone is detected, a newly generated SIP registration message is received using the detected SIP identifier of the user and the physical contact address of the preset SIP phone. Doing; And iii) recording new registration information of the SIP phone through the SIP registration message received in iv).

In step c), i) for a SIP message generated from the SIP phone, the fixed SIP identifier of the SIP phone corresponding to the From header or the To header of the SIP message is obtained using the registration information of the SIP phone. Converting and transmitting the SIP identifier of the mobile user.

In addition, the step c), i) for the SIP message received with the SIP identifier of the mobile user, corresponding to the Request-URI and To header or From header of the SIP message using the registration information of the SIP phone; Converting and transmitting the SIP identifier of the mobile user to the fixed SIP identifier of the SIP phone.

The SIP registration message is transmitted by putting the SIP identifier and the physical contact address of the SIP phone on the To header and the Contact header of the SIP message, respectively.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

First, with reference to the accompanying drawings will be described in detail to be easily carried out by those of ordinary skill in the art with respect to the embodiments of the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In describing the present invention, when it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof is omitted.

The present invention provides an apparatus and method for providing user mobility to a SIP phone.

1 is a block diagram of an apparatus for providing user mobility of a SIP phone according to an embodiment of the present invention.

As shown in FIG. 1, an apparatus for providing user mobility to a SIP phone 100 configured to receive a SIP-based call service through a VoIP gateway 400 for a fixed SIP identifier includes a SIP phone agent 200 and a SIP. Proxy server 300 is included.

The VoIP gateway 400 provides a circuit switched network access function, an IP-based network access function, a signaling gateway and a media gateway function for a conventional public switched telephone network (PSTN) -based communication terminal to operate as a SIP phone provided with IP-based services. Include. When the VoIP gateway 400 receives the initial driving signal of the SIP phone 100, the VoIP gateway 400 generates a SIP location registration message of the SIP phone 100 using a preset fixed SIP identifier, and then is generated from the SIP phone 100. The circuit switched network signal is converted into a SIP message using a predetermined fixed SIP identifier and then transmitted. In addition, the VoIP gateway 400 converts the SIP message received with the fixed SIP identifier of the location registered SIP phone 100 into a circuit switched network signal and transmits the converted SIP signal to the SIP phone.

The SIP phone 100 collectively refers to a communication terminal receiving a SIP-based call service through the VoIP gateway 400 for a fixed SIP identifier. The SIP phone 100 receives a fixed SIP identifier according to a predefined configuration and performs SIP location registration through the VoIP gateway 400 at the first time of operation, and then performs SIP-based incoming and outgoing call service with a predetermined fixed SIP identifier. To be provided.

SIP phone agent 200 allows SIP phone 100 to provide user mobility capable of performing SIP-based mobile multimedia services for any mobile user. To this end, the SIP phone agent 200 identifies any user access to the SIP phone 100 and performs SIP location registration for providing a SIP-based mobile multimedia service to the accessed user.

That is, the SIP phone agent 200 is located in the physically adjacent to the SIP phone 100 to detect the user's access using the identification card or identification table of the mobile user and determine the SIP identifier of the mobile user. In addition, the SIP phone agent 200 generates a SIP registration message periodically while the access of the mobile user is detected using the SIP identifier of the mobile user and the physical contact address of the preconfigured SIP phone 100. 300).

Briefly describing the SIP message, the SIP message is divided into a request / response message, wherein a SIP REGISTER request message means a location registration, deletion, and modification request, and a SIP INVITE request message is a call. It means a request. Hereinafter, a detailed description of the SIP message will be omitted.

The SIP proxy server 300 acts as a substitute for the mobile multimedia service on behalf of the SIP phone 100 connected to its network area as the first contact point of the mobile multimedia service network 500, and the SIP phone 100. Manage the location registration information of the SIP phone 100 to convert the SIP identifier of the SIP message transmitted and received. Specifically, the SIP proxy server 300 generates location registration information of the SIP phone 100 through a location registration message generated when the SIP phone 100 is initially driven, and any mobile user may set the SIP phone 100. When receiving the SIP registration message of the SIP phone 100 generated from the SIP phone agent 200 when accessing the) stores the new location registration information of the SIP phone 100. Subsequently, the Request-URI and To headers allow the VoIP gateway 400 to process the SIP message received by the SIP identifier of the user who has moved to the SIP phone 100 while the location registration information is valid. Alternatively, the SIP identifier of the mobile user corresponding to the From header is converted into a fixed SIP identifier configured when the SIP phone 100 is initially driven, and then transferred. In addition, the SIP proxy server 300 uses the location registration information for the SIP message generated from the SIP phone 100 to set a fixed SIP identifier configured at the time of initial operation of the SIP phone 100 corresponding to the From header or the To header. By converting and transmitting the SIP identifier of the newly moved user to the phone 100, the mobile user to the SIP phone to enable the incoming and outgoing service of the SIP message.

2 is a block diagram of a SIP phone agent 200 in a device for providing user mobility of a SIP phone according to an embodiment of the present invention.

 The SIP phone agent 200 includes a user access detection interface 210, a SIP identifier determiner 220, and a SIP phone location register 230.

The user access detection interface unit 210 detects any user's access by interfacing with the identification card or the identification tag of the mobile user.

The SIP identifier determiner 220 determines the SIP identifier of the user detected through the user sensing interface 210 and transmits the SIP identifier to the SIP phone location register 230.

The SIP phone location register 230 interfaces with the SIP proxy server 300 to perform SIP location registration of the user who has moved to the SIP phone 100. The SIP phone location registration unit 230 generates and moves a SIP registration message including a SIP identifier delivered from the SIP identifier determination unit 220 and a physical contact address of the preconfigured SIP phone 100 as a To header and a Contact header, respectively. While the user's approach is detected, the location registration of the SIP phone 100 is performed periodically.

3 is a flowchart illustrating a message according to a method for providing user mobility of a SIP phone according to an embodiment of the present invention.

When the SIP phone 100 transmits the driving signal to the VoIP gateway 400 (S300), the VoIP gateway 400 may set a fixed SIP identifier (phone1 @ domain) and the SIP phone 100 of the preconfigured SIP phone 100. A SIP RESISTER message (hereinafter referred to as a SIP registration message) having a physical contact address (address1) having a To header and a Contact header, respectively, is generated and transmitted to the SIP proxy server 300 (S302). The SIP proxy server 300 receives the SIP registration message and generates registration information of the SIP phone 100 (S304).

The SIP phone 100 is provided with a SIP-based incoming and outgoing call service with a fixed SIP identifier (phone1 @ domain) which is configured in advance through a registration process performed at the first startup.

When the SIP phone agent 200 detects any mobile user access to the SIP phone 100 (S306), the detected SIP identifier (bob @ domain) of the user and the physical contact address of the preconfigured SIP phone 100 ( Address 1) generates a SIP registration message having a To header and a Contact header, respectively, and transmits it to the SIP proxy server 300 (S308). The SIP proxy server 300 records new registration information of the SIP phone 100 through the SIP registration message transmitted by the SIP phone agent 200 (S310).

Next, while the registration information is valid, the SIP proxy server 300 responds to the SIP message received with the SIP identifier bob @ domain of the user newly moved to the SIP phone 100 (S312). The VoIP gateway 300 The fixed SIP identifier (phone1) set when the SIP phone 100 is first started by using the location registration information to process the SIP identifier (bob @ domain) of the mobile user corresponding to the Request-URI, To header or From header. @domain) (S314) and transmits (S316).

In addition, the SIP proxy server 300 fixes the SIP message generated from the SIP phone 100 (S318) by using location registration information, and sets the environment when the SIP phone 100 corresponding to the From header or the To header is first driven. The SIP identifier (phone1 @ domain) is converted into the SIP identifier (bob @ domain) of the newly moved user to the SIP phone 100 (S320) and transmitted (S322).

As described above, the SIP-based mobile multimedia service is accessed by accessing the SIP phone 100 through the mobile user access detection and registration process of the SIP phone agent 200, the registration information management of the SIP proxy server 300, and the conversion of the SIP identifier. Any mobile user who wants to receive the SIP-based mobile multimedia service can be provided without changing and resetting the configuration of the SIP phone 100.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

As described above, according to the present invention, it detects any user's access to the SIP phone, performs registration of the SIP phone with respect to the detected SIP identifier of the user, and registers registration information of the SIP phone managed by the SIP proxy server. SIP phone configured to provide SIP-based call services for fixed SIP identifiers through SIP identifier conversion of SIP messages sent to and received from SIP phones by means of SIP for any mobile user without conscious intervention by the user in ubiquitous computing There is an effect that can provide a user mobility capable of performing a base mobile multimedia service.

1 is a block diagram of an apparatus for providing user mobility of a SIP phone according to an embodiment of the present invention.

2 is a block diagram of a SIP phone agent in FIG.

3 is a flowchart illustrating an operation of a message according to a method for providing user mobility of a SIP phone according to an embodiment of the present invention.

Claims (12)

An apparatus for providing user mobility to a SIP phone configured to receive a SIP-based call service through a VoIP gateway for a fixed Session Initiation Protocol (SIP) identifier, A SIP phone agent identifying any user access to the SIP phone and performing location registration of the SIP phone with the accessed user's SIP identifier; And SIP proxy server for managing location information of the SIP phone and converting SIP identifiers of SIP messages transmitted and received to the SIP phone Device for providing user mobility of a SIP phone comprising a. The method of claim 1, The SIP phone is a device for providing user mobility of a SIP phone, characterized in that a SIP-based call service is provided with the fixed SIP identifier by performing a location registration through the VoIP gateway when a fixed SIP identifier is assigned during initial operation. The method of claim 1, The SIP phone agent, A user access detection interface unit for interfacing with a mobile user's identification card or identification card to detect any mobile user's access to the SIP phone; A SIP identifier determination unit for determining a SIP identifier of a user detected from the user access detection interface unit; And SIP phone location register that generates a SIP registration message using the detected SIP identifier of the user and periodically performs location registration of the SIP phone while the access of the mobile user is detected. Device for providing user mobility of a SIP phone comprising a. The method of claim 3, wherein The SIP phone location register, Generating the SIP registration message by setting the SIP identifier of the mobile user and the preset physical contact address of the SIP phone determined by the SIP identifier determining unit in the To header and the Contact header of the SIP message, respectively; Device for providing user mobility of a SIP phone, characterized in that. The method of claim 1, The SIP proxy server, While managing the location registration information of the SIP phone, and while the location registration information of the SIP phone is valid, the Request-URI of the SIP message using the location registration information for the SIP message received with the SIP identifier of the mobile user ( Uniform Resource Identifier) and converting mobile user's SIP identifier corresponding to To header or From header into fixed SIP identifier of SIP phone Device for providing user mobility of a SIP phone, characterized in that. The method of claim 1 The SIP proxy server, While managing location registration information of the SIP phone, and while the location registration information of the SIP phone is valid, the location message corresponding to the From header or the To header of the SIP message using the location registration information for the SIP message generated from the SIP phone. Converting and transmitting the fixed SIP identifier of the SIP phone to the SIP identifier of the mobile user Device for providing user mobility of a SIP phone, characterized in that. A method for providing user mobility for a SIP phone configured to receive a SIP-based call service through a VoIP gateway for a fixed SIP identifier, a) performing SIP location registration through the VoIP gateway with a preset fixed SIP identifier; b) if a mobile user's access to the SIP phone is detected, performing location registration with a SIP identifier corresponding to the mobile user; And c) providing a SIP-based mobile multimedia service to the mobile phone through the SIP identifier conversion of a SIP message transmitted and received to the SIP phone using the location registration information of the SIP phone; Method for providing user mobility of a SIP phone comprising a. The method of claim 7, wherein Step a) is Iii) receiving a SIP registration message generated using a fixed SIP identifier preset at the time of initial driving of the SIP phone and a physical contact address of the SIP phone; And Ii) generating registration information of the SIP phone through the received SIP registration message; Method for providing user mobility of a SIP phone comprising a. The method of claim 7, wherein Step b), Iii) receiving a newly generated SIP registration message using the detected SIP identifier of the user and the physical contact address of the preset SIP phone when the access of the mobile user to the SIP phone is detected; And Iii) recording new registration information of the SIP phone through the SIP registration message received in iv); Method for providing user mobility of a SIP phone comprising a. The method of claim 7, wherein Step c) is for a SIP message originating from the SIP phone, Converting the fixed SIP identifier of the SIP phone corresponding to the From header or the To header of the SIP message to the SIP identifier of the mobile user by using the registration information of the SIP phone; Method for providing user mobility of the SIP phone further comprising. The method of claim 7, wherein In step c), for the SIP message received with the SIP identifier of the mobile user, Converting the SIP identifier of the mobile user corresponding to the Request-URI and To header or From header of the SIP message into the fixed SIP identifier of the SIP phone by using the registration information of the SIP phone; Method for providing user mobility of the SIP phone further comprising. The method according to any one of claims 7 to 11, And the SIP registration message is transmitted by putting the SIP identifier and the physical contact address of the SIP phone on the To header and the Contact header of the SIP message, respectively.