WO2012096542A2

WO2012096542A2 - System and method for controlling session mobility between terminals when session information is absent

Info

Publication number: WO2012096542A2
Application number: PCT/KR2012/000325
Authority: WO
Inventors: 심재찬; 문화신; 허강석; 김화숙; 이동훈; 유초롱; 김상권; 조기성; 류원
Original assignee: 한국전자통신연구원
Priority date: 2011-01-14
Filing date: 2012-01-13
Publication date: 2012-07-19
Also published as: WO2012096542A3; KR20120082806A; KR101526492B1; DE112012000480T5

Abstract

Provided is a system which enables session mobility and media mobility between terminals even when the session information currently being provided is not known in advance. A method for operating a target terminal to be provided with media mobility between user terminals of a system for providing media sessions between a source terminal and a remote terminal through an IMS entity and a continuity control server, comprises the following steps: receiving user input information indicating a request for mobility of media provided through a media session between the source terminal and the remote terminal; generating a register message for requesting media mobility according to the request for mobility of media based on the user input information; and transmitting the register message to the IMS entity.

Description

System and method for controlling session movement between terminals in the absence of session information

The present invention relates to a system and a control method for switching or moving media of a service session composed of a plurality of media flows to another terminal in a situation where a user is provided with a plurality of terminals through a All IP network.

Session mobility to guarantee service movement means that an ongoing session is moved to a target network or terminal when a change of an access network or a service using terminal occurs while a multimedia service session is in progress. In this way, when the session is moved, session disconnection does not occur and the corresponding service is provided without interruption is called service continuity.

In the 3rd Generation Partnership Project (3GPP), the standardization of continuity guarantee between access networks according to the movement of terminals is performed to guarantee the continuity of multimedia services. Currently, the standardization for continuity of multimedia service is guaranteed through session movement between terminals.

Session movement between terminals includes a method of moving all of the media constituting the session, and a method of moving only some of the media. To this end, in the past, the session movement is performed using the information while the information on the session to be moved is known in advance. Looking at the system and method for moving a prior patent media session (Applicant: Samsung Electronics, Publication No. 10-2010-0012082), based on the known session information, a part of the media is separated from the ongoing session and moved to another terminal. I'm suggesting how. However, if the corresponding session information is not known in advance for the session movement, it is impossible to provide session movement between terminals in the conventional method.

Even if the session information currently in service is not known in advance, a system for enabling session movement and media movement between terminals is provided.

Provided is a system for enabling session movement between terminals and media movement even if the session information currently being serviced is not known in advance.

According to the present invention, even if the session information currently being serviced is not known in advance, it is possible to enable session movement and media movement between terminals. In view of the increasing number of application services using the Session Initiation Protocol (SIP), it is possible to guarantee the continuity of multimedia services through end-to-end sessions or media movements under any circumstances. Satisfaction can be increased.

1 is a diagram illustrating a session movement control system for controlling session movement between terminals according to an embodiment of the present invention.

2 is a diagram illustrating a method for controlling session movement between terminals according to an embodiment of the present invention in the session movement control system of FIG. 1.

3 illustrates an example of a configuration of a register message transmitted in step 214 of FIG. 2.

4 illustrates another example of a configuration of a register message transmitted in step 214 of FIG. 2.

5 illustrates an example of a notification message transmitted in operation 218 of FIG. 2.

6 is a diagram illustrating an operation of a second terminal according to an embodiment of the present invention.

7 is a diagram illustrating operation of an IMS entity according to an embodiment of the present invention.

8 is a diagram illustrating an operation of a first terminal according to an embodiment of the present invention.

9 is a diagram illustrating a configuration of a second terminal according to an embodiment of the present invention.

10 is a diagram illustrating a configuration of an IMS entity according to an embodiment of the present invention.

11 is a diagram illustrating a configuration of a first terminal according to an embodiment of the present invention.

An operation method of an object terminal provided with media movement between user terminals of a system for providing a media session between a source terminal and a remote terminal through an IMS entity and a continuity control server according to an aspect of the present invention is provided through a media session between a source terminal and a remote terminal. Receiving user input information indicating a movement request of the provided media, generating a register message requesting movement of the media according to the media movement request using the user input information, and transmitting the register message to the IMS entity; Steps.

According to another aspect of the present invention, an operating method of a source terminal providing media movement between user terminals of a system providing a media session between a source terminal and a remote terminal through an IMS entity and a continuity control server is connected between the source terminal and the remote terminal from a target terminal. Receiving a notification message from the IMS entity informing the status that a register message requesting the movement of the media being provided through the media session has been received, and processing the notification message to determine whether to move the requested media to the destination terminal; And if it is determined to move the requested media to the target terminal, forwarding a message to the continuity control server requesting to move the requested media to the target terminal.

According to another aspect of the present invention, there is provided a method of operating an IMS entity that provides media movement between user terminals in a system that provides a media session between a source terminal and a remote terminal through an IMS entity and a continuity control server. Receiving a register message requesting the movement of the media being provided through the media session, extracting information related to the media movement request from the register message, and using the extracted information to maintain a media session for the media And generating a notification message informing of the state in which the register message is received from the destination terminal, and transmitting the notification message to the source terminal.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention. In the following description of the present invention, if it is determined that detailed descriptions of related well-known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to intention or custom of a user or an operator. Therefore, the definition should be made based on the contents throughout the specification.

The session movement control system 100 enables media session connection between terminals through the IP Multimedia Subsystem (IMS) entity 150 and the continuity control server 140, and controls session movement between terminals. The session movement control system 100 may be configured to allow users to use multimedia application services such as telephony, teleconferencing, telemedicine, and the like.

The session movement control system 100 may include a first terminal 110 of user A, a second terminal 120 of user A, a remote terminal 130 of user B, and a continuity control server 140. ) And IMS entity 150. 1 illustrates two terminals used by user A and one terminal of user B, but embodiments of the present disclosure are not limited thereto, and session connection and session movement between a plurality of terminals used by a plurality of users may be performed. The first terminal 110 of the user A, the second terminal 120 of the user A, and the remote terminal 130 of the user B may have various forms such as a mobile phone, a smart phone, and an IPTV.

The continuity control server 140 is an application server that provides a service continuity control function based on IMS. In addition, the continuity control server 140 performs a control management function of a collaborative session. A cooperative session is a logical set of IMS sessions spanning two or more terminals.

IMS entity 150 is a system that provides IMS functionality. The IMS entity 150 enables packet exchange based on IP (Internet Protocol) to wired terminals and wireless terminals, and connects both wired and wireless terminals through IP (All-IP). Under such IMS, IP based sessions are controlled by the Session Initiation Protocol (SIP). SIP is a protocol for controlling sessions, and refers to a signaling protocol in which terminals to communicate with each other identify a location, find a location thereof, create a multimedia session with each other, or delete and change a created session. Such SIP uses a SIP Uniform Resource Identifier (URI), which is similar to an email address, to distinguish each user, providing services without being dependent on the IP address.

In FIG. 1, it is assumed that the first terminal 110 maintains at least one media session with the remote terminal 130. The second terminal 110 may request media movement that the first terminal 110 maintains with the remote terminal 130 and is provided through a media session. When a plurality of media sessions are connected between the first terminal 110 and the remote terminal 130 through one service session, the second terminal 120 moves the media provided through some media sessions of the plurality of media sessions. You can request For example, the plurality of media sessions may include a media session provided with a video media flow, a media session provided with an audio media flow, and a media session provided with a text media flow, and the second terminal 120 may include a video. The media flow may request the movement of video data of the provided media session.

When some media among the media that were being provided through the media session connected between the first terminal 110 and the remote terminal 130 are moved to the second terminal 120, the continuity control server 140 performs a cooperative session. A media session connected to the first terminal 110 and the second terminal 120 may be managed. In this case, the first terminal 110 may operate as a control UE having control over the media flow, and the second terminal 120 may operate as a UE under control of the movement of the media flow. In addition, the first terminal 110 is a source terminal for providing media movement between user terminals of the system for providing a media session between the source terminal and the remote terminal through the MS entity and the continuity control server, the second terminal 120 is a user It may be referred to as a destination terminal provided with media movement between terminals.

FIG. 2 is a diagram illustrating a method for controlling session movement between terminals according to an embodiment of the present invention in the session movement control system 100 of FIG. 1.

Referring to FIG. 2, the first terminal 110 of user A and the remote terminal 130 of user B are using a service composed of two media. That is, a media path consisting of audio media and video media is connected between the first terminal 110 and the remote terminal 130 (10).

At this time, the user A wants to move the video media of the service being used to the second terminal 120 which is his other terminal, and the second terminal 120 is using the service session and the media session through the first terminal 110. Suppose you do not have session information associated with. In this case, media movement control may be performed between the

terminals

110, 120, and 130 through the following procedure.

User A's first terminal 110 discovers a target UE to which the media can move (210). In this case, the first terminal 110 may use the Reg Event Package service provided by the IMS entity 150.

In order for the user A to request the movement of the video media through the second terminal 120, the second terminal 120 receives user input information from the user A (212). The user input information may include identification information for distinguishing a media movement request of the second terminal 120 which is the target terminal, and a source terminal (here, the first terminal 110) in which an existing media session between the remote terminals 130 is set. It may include source terminal identification information to identify, media type information of the media to be moved included in the existing media session, and service identification information identifying a service including the media session to be moved.

The second terminal 120 transmits the user A's video media movement request to the IMS entity 150 using the REGISTER message of the Session Initiation Protocol (SIP) (214). The register message includes user input information entered in operation 212 and is sent to IMS entity 150.

The IMS entity 150 transmits an OK message indicating the acceptance of the register message to the second terminal 120, indicating that the register message has been well received (216).

The IMS entity 150 transmits (218) the first terminal 110 to the first terminal 110 using a SIP NOTIFY message indicating the status of the media use request from the user A's second terminal 120. The notification message of the SIP includes the user input information input in operation 212 transmitted through the register message and is transmitted to the first terminal 110.

Then, the first terminal 110 transmits 220 to the IMS entity 150 using the OK message that the notification message has been normally received (220).

The first terminal 110 accepts the movement request of the desired video media to the second terminal 120, and determines whether to move the media session to the second terminal 120 (222).

If the first terminal 110 accepts the movement request of the video media, the video media is transmitted from the user A's first terminal 110 to the second in accordance with the inter-user media movement control procedure defined in TS 24.337 of 3GPP. The terminal 120 is moved (224).

As a result, a cooperative session is established 20 between the continuity control server 140, the first terminal 110, and the second terminal 120. In addition, among the video and audio media initially established between the first terminal 110 and the remote terminal 130 of user A, the audio media remains in the first terminal 110 (40), and the video media of user A The other terminal moves to the second terminal 120 (30). That is, in using the service composed of user B and audio and video media, user A uses audio media through the first terminal 110 and video media through the second terminal 120.

In case of using a SIP register message in step 3 for a media movement request between terminals, there is a method of using a contact header and a method of using an XML body.

3 illustrates an example of a configuration of a register message transmitted in step 214 of FIG. 2. FIG. 3 is an example of information configuration when using a contact header of a SIP register message transmitted in operation 214 of FIG. 2.

Referring to the contact header information 300 of FIG. 3, "+ g.3gpp.iut.solicit" is set to indicate identification information for identifying a media movement request of the terminal. In addition, requested-ue = "sip: user1_public1@home1.net" is set as terminal identification information (identification information of the first terminal 110 in FIG. 2) in which the zone session is set. In addition, media-type = "video" is set as media type information to be included in the existing session. In addition, service-type = "mmtel" is set as service identification information associated with the session including the media to be moved.

As such, user input information may be set in the contact header of the register message and transmitted to the IMS entity 150.

4 illustrates another example of a configuration of a register message transmitted in step 214 of FIG. 2. 4 illustrates an example of using a data area of a SIP register message transmitted in operation 214 of FIG. 2.

The data area may be represented by an XML body. Referring to the XML body 400 of FIG. 4, first, "Content-Type: application / vnd.3gpp.solicitation + xml" in the "Content-Type Header" to indicate identification information for distinguishing the media movement request of the terminal. Is set. In addition, <requested-user-equipmentue-id = "sip: user1_public1@home1.net" /> is set as terminal identification information for which an existing session is set. In addition, <media-type> video </ media-type> is set as media type information to be included in an existing session. In addition, <service-type srvc-id = "urn: urn-7: 3gpp-service.ims.icsi.mmtel" /> is set as service identification information associated with the session including the media to be moved.

As such, user input information may be set in the data area of the register message and transmitted to the IMS entity 150.

Using the contact header of FIG. 3 in the SIP register message or using the XML body of FIG. 4 in operation 214 of FIG. 2, if the user's media move request is forwarded to the IMS entity 150, the IMS entity 150 is sent to the media move. The request is informed by using the SIP notification message to the terminal, for example, the first terminal 110, which owns the requested media in which the session currently in progress is established.

5 is an example of a SIP notification message transmitted in step 218 of FIG. 2 according to an embodiment of the present invention.

Referring to the notification message 500 of FIG. 5, first, name = "solicit iut" is set to unknown-param to indicate identification information for identifying a media movement request of a terminal. In addition, name = "sip: user1_public1@home1.net" is set as terminal identification information for which an existing session is set. In addition, name = "video" is set as media type information to be included in the existing session. In addition, name = "urn: urn-7: 3gpp-service.ims.icsi.mmtel" is set as service identification information associated with the session including the media to be moved.

As such, the user input information is transmitted through the register message, and is transmitted to the first terminal 110 which is the source terminal through the notification message.

6 is a diagram illustrating an operation of the second terminal 120 corresponding to the destination terminal according to an embodiment of the present invention.

The second terminal 120 receives user input information indicating a request for movement of media provided through a media session between the source terminal, that is, the first terminal 110 and the remote terminal, through the user input signal (610). To this end, the second terminal 120 may provide a user interface screen for receiving user input information indicating a media movement request.

The user input information may include identification information for distinguishing a media movement request of the target terminal, source terminal identification information for which a media session for which a movement requested media is provided, media type information of media to be moved included in the media session, and a media session to be moved. It may include service identification information for identifying a service including a. Here, the source terminal identification information may be a SIP URI. Alternatively, the source terminal may be a tel URI identified by a phone number, but is not limited thereto. In addition, the media type information may be information indicating a media type of some of the plurality of media provided through the plurality of media sessions between the source terminal and the remote terminal.

The second terminal 120 generates a register message requesting the movement of the media according to the media movement request using the user input information (620). User input information may be included in the contact header of the register message. Alternatively, the user input information may be included in an XML body corresponding to the data area of the register message.

The second terminal 120 transmits the register message to the IMS entity 150 (630).

When the second terminal 120 successfully performs the media movement procedure of the IMS entity 150 and the continuity control server 140, the second terminal 120 may provide media for providing media indicated by a user input signal between the remote terminals 130. A session may be established (640).

7 is a diagram illustrating operation of the IMS entity 150 according to an embodiment of the present invention.

The IMS entity 150 receives a register message requesting the movement of the media being provided through the media session between the first terminal 110 as the source terminal and the remote terminal 130 from the second terminal 120 as the target terminal ( 710).

IMS entity 150 extracts 720 the information associated with the media move request from the register message. The information related to the media movement request corresponds to user input information input to the second terminal 120. That is, the extracted information may include identification information for distinguishing a media movement request of the target terminal, source terminal identification information on which a media session provided with the movement requested media is set, media type information of the media to be moved included in the media session, and movement. Service identification information identifying a service including the media session. The IMS entity 150 may extract information related to the media move request from the contact header of the register message or the XML body corresponding to the data area of the register message.

The IMS entity 150 uses the extracted information to generate a notification message to the source terminal maintaining the media session on the media, informing the state that the register message has been received from the target terminal (730). The notification message includes information extracted in operation 720, that is, user input information input to the second terminal 120. In addition, the notification message may include destination terminal identification information for identifying the destination terminal transmitting the register message.

The IMS entity 150 transmits the notification message to the first terminal 110, which is the source terminal identified by the source terminal identification information included in the extracted information (740).

If the IMS entity 150 determines that the message requesting the movement of the media corresponding to the information related to the media movement request extracted from the register message is transmitted by the first terminal 110 as the source terminal (750), Perform media movement procedure (760).

8 is a diagram illustrating an operation of a first terminal 110 corresponding to a source terminal according to an embodiment of the present invention.

The first terminal 110 discovers a potential terminal device capable of moving media to confirm user information of the potential terminal device and media processing capability of the potential terminal device (810).

The first terminal 110 receives a notification message from the IMS entity 150 indicating a state in which a register message for requesting movement of the media being provided through a media session connected between the source terminal and the remote terminal is received (820). .

The first terminal 110 processes the notification message to determine whether to move the media to the destination terminal (830). The first terminal 110 may include identification information for distinguishing a media movement request of the target terminal from the notification message, source terminal identification information for establishing an existing media session between the source terminal and the remote terminal, and media of the media to be moved included in the existing media session. Service identification information identifying a service including type information and a media session to be moved may be extracted. In addition, the extracted information may be performed using the extracted information of the discovery result and the processing result of the notification message. For example, the first terminal 110 checks whether the extracted source terminal identification information matches its own terminal identification information, and the extracted media identification information corresponds to the media identification information set by the remote terminal 130. In operation 810, it may be determined whether the target terminal has the capability to process the requested media session using the target terminal identification information transmitted through the notification message.

When the first terminal 110 determines to move the media to the target terminal, the first terminal 110 transmits a message to the continuity control server 140 requesting to move the media to the target terminal (840).

If the requested media is media corresponding to some of the media sessions of the plurality of media sessions in the first terminal 110, the first terminal 120 may be moved to the second terminal 120 and the remaining media session may be maintained. have.

9 is a view showing the configuration of the second terminal 120 according to an embodiment of the present invention.

As described above, the second terminal 120 may be a target terminal requesting a movement of media provided through a media session established between the first terminal 110, which is a source terminal, and the remote terminal 130. The second terminal 120 may include a data processor 910, a user input unit 920, and a communication unit 930.

The data processor 910 may be configured to control overall operations of the second terminal 120 and to process a message according to session processing and SIP. The data processor 910 may include a session processor 912 and a register message generator 914.

The user input unit 920 receives user input information indicating a request for movement of media provided through a media session between a source terminal and a remote terminal. The user input information may include identification information for distinguishing a media movement request of the target terminal, source terminal identification information for which a media session for which a movement requested media is provided, media type information of media to be moved included in the media session, and a media session to be moved. It includes service identification information for identifying a service including a.

The session processing unit 912 performs session related processing such as setting up and canceling a media session and a service session. The register message generator 914 generates a register message for requesting the movement of the media according to the media movement request using the user input information.

The communication unit 930 performs communication with devices connected through a network, for example, the continuity control server 140, the IMS entity 150, and the remote terminal 130. When the register message generator 914 generates a register message, the register message is transmitted to the IMS entity 150 through the communication unit 930.

10 is a diagram illustrating a configuration of the IMS entity 150 according to an embodiment of the present invention.

The IMS entity 150 may include a media processing unit 1010 and a networking unit 1020.

The networking unit 1020 receives a register message requesting the movement of the media being provided through the media session between the source terminal and the remote terminal from the target terminal.

The media processing unit 1010 operates to provide an IMS function. The media processing unit 1010 extracts information related to the media movement request from the register message, and displays a state in which a register message is received from the target terminal as a source terminal that maintains a media session with respect to the movement requested media using the extracted information. An alert generates a notification message. Information related to the media movement request corresponds to user input information input to the second terminal 120. The notification message may include identification information identifying the destination terminal transmitting the register message in addition to the information related to the media movement request extracted from the register message.

The generated notification message is transmitted to the source terminal through the networking unit 1020.

11 is a diagram illustrating a configuration of a first terminal 110 according to an embodiment of the present invention.

The first terminal 110 may include a data processor 1110 and a communication unit 1120.

The communication unit 1120 receives a notification message from the IMS entity 150 indicating a state in which a register message for requesting a movement of the media being provided through the media session connected between the source terminal and the remote terminal is received from the destination terminal.

The data processor 1110 may include a session processor 112 and a notification message processor 114. The session processor 1112 performs session related processing such as setting up and canceling a media session and a service session. The session processor 1112 may discover a potential terminal device capable of moving media, so as to confirm user information of the potential terminal device and media processing capability of the potential terminal device.

The notification message processing unit 1114 processes the notification message to determine whether to move the media to the target terminal. The notification message processing unit 1114 may determine whether to move the media to the target terminal by using the discovery result and the information extracted as a result of the processing of the notification message.

When the notification message processor 1114 determines to move the media to the target terminal, the notification message processor 1114 may control the communication unit 1120 to transmit a message requesting to move the media to the target terminal to the continuity control server 140.

According to the present invention, even if the session information currently being serviced is not known in advance, it is possible to enable session movement and media movement between terminals. In view of the increasing number of application services using SIP, it is possible to guarantee the continuity of multimedia services through session or media movement between terminals in any situation, thereby increasing service satisfaction of users.

One aspect of the invention may be embodied as computer readable code on a computer readable recording medium. Codes and code segments implementing the above program can be easily deduced by computer programmers in the art. Computer-readable recording media include all kinds of recording devices that store data that can be read by a computer system. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical disk, and the like. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

The above description is only one embodiment of the present invention, and those skilled in the art may implement the present invention in a modified form without departing from the essential characteristics of the present invention. Therefore, the scope of the present invention should not be limited to the above-described examples, but should be construed to include various embodiments within the scope equivalent to those described in the claims.

Claims

A method of operating a target terminal provided with media movement between user terminals in a system providing a media session between a source terminal and a remote terminal through an IMS entity and a continuity control server,

Receiving user input information indicating a request for movement of media provided through a media session between the source terminal and the remote terminal;

Generating a register message requesting movement of media according to the media movement request using the user input information; And

Sending the register message to an IMS entity.
The method of claim 1,

The user input information may include identification information for distinguishing a media movement request of a target terminal, source terminal identification information on which a media session for which a movement requested media is provided, media type information of a media to be moved included in the media session, and movement information. Service identification information identifying a service comprising a media session.
The method of claim 2,

The register message comprises the user input information in a contact header.
The method of claim 2,

And wherein the register message includes the user input information in an XML body corresponding to a data area.
The method of claim 2,

The source terminal identification information is characterized in that the SIP URI.
The method of claim 2,

And the source terminal identification information is a tel URI.
The method of claim 2,

Wherein the media type information is information indicating a media type of some media of a plurality of media provided through a plurality of media sessions between the source terminal and the remote terminal.
The method of claim 1,

In response to performing a media movement procedure of the IMS entity and the continuity control server, the target terminal establishes a media session for providing a media indicated by the user input signal with the remote terminal; Method further comprising a.
The method of claim 1,

Providing a user interface screen for receiving user input information indicating a media movement request.
The method of claim 1,

The source terminal and the destination terminal is characterized in that the terminal used by the same user.
A method of operating a source terminal for providing media movement between user terminals in a system providing a media session between a source terminal and a remote terminal through an IMS entity and a continuity control server,

Receiving, from the IMS entity, a notification message indicating a status of a register message requesting movement of media being provided through a media session connected between the source terminal and the remote terminal from the destination terminal;

Processing the notification message to determine whether to move the requested media to the destination terminal; And

If it is determined to move the requested media to the target terminal, forwarding a message requesting to move the requested media to the target terminal to the continuity control server.
The method of claim 11,

Processing the notification message,

Identification information for distinguishing a media movement request of the target terminal from the notification message, source terminal identification information on which a media session provided with the movement requested media is set, media type information of the media to be moved included in the media session, and a media session to be moved. Extracting service identification information identifying a service comprising a;
The method of claim 12,

Discovering a potential terminal device capable of moving the media;

And determining whether to move media to the destination terminal by processing the notification message, using the discovery result and the extracted information as a result of processing the notification message.
The method of claim 13,

In the step of discovering, identifying user information of the potential terminal device and media processing capability of the potential terminal device.
A method of operating an IMS entity that provides media movement between user terminals in a system that provides a media session between a source terminal and a remote terminal through an IMS entity and a continuity control server,

Receiving a register message requesting a movement of a media being provided through a media session between the source terminal and the remote terminal from a destination terminal;

Extracting information related to a media movement request from the register message, and using the extracted information to the source terminal that maintains the media session for the media to inform the status message that the register message received from the destination terminal Generating; And

Transmitting the notification message to the source terminal; Method comprising a.
The method of claim 15,

The extracted information may include identification information for distinguishing a media movement request of a target terminal, source terminal identification information on which a media session for which a movement requested media is provided, media type information of a media to be moved included in the media session, and movement information. And a media session.
The method of claim 16,

And wherein the notification message includes the extracted information.
The method of claim 16,

Extracting information related to a media move request from the register message, extracting information related to the media move request from a contact header of the register message.
The method of claim 16,

Extracting information related to a media move request from the register message, extracting information related to the media move request from an XML body of the register message.