KR20060091451A - Method and system for representin caller image using of session initiation protocol - Google Patents

Abstract

The present invention provides a caller image display service method in a system having a communication terminal having a SIP client function for establishing a call through a SIP protocol, and a SIP server for transmitting a session establishment request message transmitted from the communication terminal to a called terminal. After the communication terminal receives an incoming call number and image information from the user, when a call command is input, the communication terminal generates a session establishment request message including the image information and transmits the message to the SIP server. When the session establishment request message is received, if the terminal is authenticated by performing authentication with the communication terminal, the session establishment request message is transmitted to the called terminal, and the called terminal transmits the image information included in the session establishment request message. Simultaneously displays the ring signal and displays the ring signal. In the wired / wireless communication service of the van, an image designated by the caller may be displayed through the screen of the called terminal at the time of call setup.

SIP, session setup, communication terminal, image

Description

Method and system for displaying caller image using SPI protocol Method and system for representin caller image using of session initiation protocol

1 is a block diagram schematically showing the configuration of a caller image display service system according to the present invention.

Figure 2 is a block diagram schematically showing the configuration of a communication terminal for displaying the caller image according to the present invention.

3 is a diagram illustrating a session establishment request message according to the present invention;

4 is a flowchart illustrating a caller image display service method according to the present invention;

5 is a flowchart illustrating a method for generating a session establishment request message of a communication terminal according to the present invention;

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

100: communication terminal 110: SIP server

200: key input unit 210: control unit

220: wireless processing unit 230: storage unit

240: display unit 250: voice processing unit

The present invention provides a caller image display service method using a SIP protocol for transmitting a text and a video inputted and specified by a caller to a called party when a video call based on a session initiation protocol (SIP) and a mobile phone using a voice over internet protocol (VoIP). And to the system.

Today, with the development of mobile telecommunications, the convenience of mobile phones and the price of terminals have decreased, and mobile phones have emerged as a necessity of life, and the number of subscribers has exploded.

Early mobile phones were merely for phone calls, but as the technology of mobile phones developed, various services appeared. Representative services include caller ID service and short message service.

The caller display service is a service for displaying the caller's telephone number on the called party's terminal, but the called party reports only the phone number and has a disadvantage in that the caller cannot be immediately recognized.

To this end, the called party registers the phone number and its name in advance in his mobile terminal, and the mobile terminal checks the caller's telephone number with the phone number stored in the mobile terminal in advance. The name is displayed.

However, the caller name display function using the present caller indication service has a disadvantage in that the caller ID must be registered in advance in the called party's terminal, and the name is set and stored accordingly.

In addition, because the caller's mobile terminal is based on the called party's mobile terminal, the calling party's name not stored in the called party's mobile terminal may not be known by the caller's name.

In addition, the caller ID service requires a separate network caller ID node, and if the caller sets a name for each called number, the caller accesses the calling ID node every time the call is made and if there is a caller name stored in the caller ID, the caller is called. The name is displayed as the called terminal. This conventional method is inconvenient to use because a network traffic load is generated for each call to the caller display node, and a service user needs to access the caller display node to an environment such as the Internet in order to change the caller display name. There is.

Accordingly, an object of the present invention is to provide a caller image display service method and system using a SIP protocol capable of transmitting a text and a video inputted and specified by a caller to a called party when sending a SIP-based video call and a mobile call using VoIP. .

According to an aspect of the present invention to achieve the above object, a communication terminal having a SIP client function to set up a call over the SIP protocol, SIP server for transmitting a session establishment request message sent from the communication terminal to the destination terminal is provided In the present method, the caller image display service method, wherein the communication terminal receives a caller number and image information from a user, and when a call command is input, generates a session establishment request message including the image information to the SIP server. When the session setting request message is received from the communication terminal, the SIP server authenticates the communication terminal and transmits the session setting request message to the called terminal if the terminal is authenticated. Image information included in the session establishment request message The sender image display service method is provided which is characterized in that at the same time as siham output a ring signal.

According to another aspect of the present invention, a SIP client function is provided to allow a call to be established through the SIP protocol, and when a caller's call city caller ID and image information selection information is received, a session establishment request message including the image information is generated. And a SIP server for transmitting the received session establishment request message to the called terminal when the service subscriber receives the session establishment request message from the communication terminal. A caller image display service system is provided.

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

1 is a block diagram schematically showing the configuration of a caller image display service system according to the present invention.

Referring to FIG. 1, when a caller image display service system receives a session setup request message from a communication terminal 100 generating a session setup request message including image information, and the communication terminal 100, SIP server 110 to perform the call connection.

The caller image display service system is based on an IP network connected through a public land mobile network (PLMN), a public switched telephone network (PSTN), and the like (120).

The communication terminal 100 includes various wired and wireless terminals that perform communication services based on IP networks such as cellular phones, wired terminals, IP terminals, PDAs, personal computers, and the like. The communication terminal 100 should have a function for displaying an image, and should be equipped with a SIP client function for enabling call setup through the SIP server 110.

The user establishes a call with the called terminal by using the communication terminal 100. When the communication terminal 100 inputs a called number and image information from the caller, the communication terminal 100 generates a session establishment request message including the image information. To the SIP server 110. That is, when a caller selects a specific image by manipulating his or her terminal when the call is attempted, the calling terminal transmits a session establishment request message including the selected image information to the SIP server 110, and the SIP server 110. Performs call setup according to the session establishment request message.

The SIP server 110 is a server for controlling a text-based application layer control protocol for performing call setup of various services as well as VoIP service between terminals using SIP. SIP is a protocol for signal-to-person signaling, identifying a client using an e-mail address form and providing client mobility.

That is, it enables clients to use the same SIP address but have the mobility of registering, modifying, deleting, and retrieving locations from terminals or computers in different places, forking other request messages, connecting to sessions, and rejecting request messages. It is a protocol that performs session interruption function in use and operates independently for lower transport protocol.

The SIP server 110 receives a session establishment request message as a call is attempted from the calling terminal, determines whether the subscriber who attempted the call uses the service, and includes a session set by the subscriber to display on the called terminal. The setup request message is transmitted to the called terminal.

That is, when the session establishment request message is received from the originating terminal, the SIP server 110 determines whether image information is included in the message. As a result of the determination, if the session establishment request message includes image information, the SIP server 110 determines whether to use the service of the calling terminal and transmits a session establishment request message including the image information to the called terminal.

In general, the message for SIP signaling is transmitted through the User Datagram Protocol (UDP) protocol, but the transmission of the image should be transmitted through the Transmission Control Protocol (TCP) protocol instead of the UDP protocol in consideration of its size, and its function to the terminal. This should be supported.

2 is a block diagram schematically illustrating a configuration of a communication terminal for displaying a caller image according to the present invention.

Referring to FIG. 2, the communication terminal for displaying the caller image includes a key input unit 200, a control unit 210, a wireless processing unit 220, a storage unit 230, a display unit 240, and a voice processing unit 250. .

The wireless processor 220 converts a signal received from an antenna into an intermediate frequency signal and outputs the signal, and converts a signal to be transmitted from an intermediate frequency signal into a radio signal and outputs the signal to the antenna.

The key input unit 200 includes a plurality of numeric / character keys and function keys for performing various functions, and transmits an electrical signal of key data corresponding to a key input by a user to the controller 210. A user inputs a desired letter, number, etc. using the key input unit 200.

The display unit 240 displays the state of the communication terminal or the characters input through the key input unit 200 under the control of the control unit 210.

The voice processor 250 receives and demodulates a wireless signal received through the antenna from the wireless processor 220, outputs a voice signal by a speaker, modulates a voice signal input by a microphone, and modulates the wireless processor 220. Transmit by antenna.

The storage unit 2300 stores a program for the operation of the control unit 210 and data processed during the operation.

In addition, the storage unit 230 includes an image storage unit 235 storing information on an image that the caller wants to display on the called terminal. The image storage unit 235 may store at least one or more image information, and the caller selects any one of the plurality of image information and transmits the call when the call is attempted.

The controller 210 controls the entire communication terminal. In particular, the controller 210 determines whether to include image information when generating a session establishment request message based on data inputted by the caller. That is, if image information is included in the data input during the call attempt of the caller, the controller 210 generates a session establishment request message including the corresponding image information.

The communication terminal as described above controls whether the caller transmits the image when the call is attempted, and the controller 210 determines whether to include the image information when generating the session establishment request message based on the data input during the call attempt. .

The image file of the session establishment request message is included in the SIP signaling body part, and the content type can be attached together with a session description protocol (SDP) message using boundary parameters. The session establishment request message of the SIP signaling message includes a message as shown in FIG. 3.

3 is a diagram illustrating a session establishment request message according to the present invention.

Referring to FIG. 3, the session establishment request message is a SIP message and uses TCP. The content and type included in the body part of the SIP message indicate that the message is composed of several parts. Is separated by a boundary.

The boundary part below corresponds to the body part of the SIP message, and includes SDP information including session establishment information and image related information to be included in the SIP message. The remaining part is applied to the SIP message rules used in general session setup, and if the call setup procedure is performed as described above, the caller attached image is shown when the incoming call signal or ring rings to the called terminal. At this time, the message is an embodiment, the contents of the message can be changed according to each situation.

4 is a flowchart illustrating a caller image display service method according to the present invention, and FIG. 5 is a flowchart illustrating a method for generating a session establishment request message of a communication terminal according to the present invention.

Referring to FIG. 4, when a caller attaches an image by manipulating his own terminal when a call is attempted, the SIP client of the terminal includes the image information and transmits it to a SIP server when generating a session establishment request message (S400).

 A method for generating a session establishment request message including image information by the calling terminal will be described with reference to FIG. 5.

Referring to FIG. 5, when the calling terminal receives an incoming call number from the caller (S500), the calling terminal provides a screen for asking the caller whether to input image information (S502). A message in the form of 'Do you want to input image display information?' Is displayed on the originating image input query screen. If the caller wants to input image information, select 'Yes'. The sender then enters the outgoing image, either pre-stored or downloaded from the server.

After performing step 502, the calling terminal receives the image information input through the image input screen (S504), and when a call command is input (S506), generates a session establishment request message including the received image information. (S504).

The caller may input caller image information after inputting caller image information.

The session establishment request message generated as described above is transmitted to the SIP server.

Upon receiving the session establishment request message from the calling terminal as described above, the SIP server checks whether the calling terminal uses the service and performs authentication (S402).

If the originating terminal is an authenticated terminal in step 402, the SIP server transmits the received session establishment request message to the called terminal (S404).

Then, the called terminal displays the caller image included in the session establishment request message and outputs a ring signal (S406). In this case, if the P-Asserted-Identity header is present in the session establishment request message, the called terminal displays the SIP URL of the header as the calling public ID, and if not, displays the SIP URL of the From as the calling public ID.

After performing step 406, the called terminal transmits a message (180 RINGING message in SIP protocol) indicating that the terminal is ringing according to the reception of the session establishment request message to the calling terminal through the SIP server ( S408).

At this time, the called terminal prepares to receive the media data by determining the codec and the RTP ports that can be processed in the SDP media information of the session establishment request message, and generates the SDP. In this case, the m line of the SDP is generated in the same number and order as the m line of the session establishment request message, and inactive for the media that cannot be processed (the port is set to 0).

Then, the calling terminal can know the media information available for this session due to the 180 RINGING message, and based on this, determine the actual media codecs to be used, generate the final offer, and prepare to receive the media according to the offer. Then, the PRACK is transmitted to the called terminal (S410). In this case, one m line is used for each media type of each SDP, and one codec is set for each m line.

When the originating terminal responds to the called terminal as described above, the called terminal transmits a message including a status code (200 OK message in SIP protocol) to the calling terminal through the SIP server (S412). .

That is, the called terminal generates a final response, prepares to receive media according to the response, and responds with 200 OK. At this time, m-lines of the SDP are generated in the same number and order as m-lines in the session establishment request message, and set to inactive for media that cannot be processed. The called terminal does not transmit media until 200 OK is sent for the session establishment request message.

After performing step 412, if an ACK request message is transmitted from the originating terminal to the called terminal through the SIP server, a session is generated and a call is performed (S414).

The present invention is not limited to the above embodiments, and many variations are possible by those skilled in the art within the spirit of the present invention.

As described above, according to the present invention, it is possible to provide a method and a system for displaying a caller image using a SIP protocol for displaying an image designated by a caller on a SIP-based wired / wireless communication service through a screen of a called terminal. .

Claims (5)

A caller image display service method in a system having a communication terminal having a SIP client function for establishing a call through a SIP protocol and a SIP server for transmitting a session establishment request message transmitted from the communication terminal to a called terminal, After the communication terminal receives an incoming call number and image information from the user, and if a call command is input, generating a session establishment request message including the image information and transmitting the session establishment request message to the SIP server; If the SIP server receives a session establishment request message from the communication terminal, if the terminal is authenticated by authenticating the communication terminal, transmitting the session establishment request message to the called terminal; And The called terminal displaying image information included in the session establishment request message and simultaneously outputting a ring signal; Caller image display service method comprising a. The method of claim 1, And the image information is selected by the user among those stored in the communication terminal. The method of claim 1, And the session establishment request message includes a called number and image information. A communication terminal provided with a SIP client function for establishing a call through a SIP protocol, and generating a session establishment request message including the image information when a caller's call forwarding city number and image information selection information are received; When the session establishment request message is received from the communication terminal, it is determined whether the caller uses the service, and if the service subscriber, SIP server for transmitting the received session establishment request message to the destination terminal; Caller image display service system comprising a. The method of claim 4, wherein Image information is stored in the communication terminal, the caller image display service system, characterized in that the caller selects pre-stored image information or downloads from the server to input the image information.

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