KR100700607B1 - Method and system for performing combination service by using terminal capability version - Google Patents

Abstract

The present invention relates to a method and system for performing a combination service using a terminal capability version. According to the present invention, each terminal maintains a unique terminal capability version whenever its terminal capability information is changed, and when establishing a service connection. Send your own terminal capability version to. The calling terminal and the called terminal compare the stored terminal capability information of the opposite terminal with the received terminal capability version of the receiving terminal to check whether the terminal capability information of the opposite terminal is changed, and according to the result of the checking, the terminal capability information exchange procedure and service. Optionally perform a connection establishment procedure.

Combination service, CSI, terminal capability information, capability version, CS number, IMS session, INVITE message, OPTION message

Description

METHOD AND SYSTEM FOR PERFORMING COMBINATION SERVICE BY USING TERMINAL CAPABILITY VERSION}

1 is a diagram showing a network configuration for providing a general combination service between a first terminal and a second terminal.

2 illustrates a general method for exchanging terminal capability information between a first terminal and a second terminal.

Figure 3 shows a terminal with a storage device for storing a terminal capability version according to the current terminal capability information according to the present invention.

4 is a view showing a method of generating a unique terminal capability version corresponding to the current terminal capability information according to the present invention.

5 is a view showing a first embodiment of a method of performing a combination service using a terminal capability version according to the present invention;

6 is a view showing a second embodiment of a method of performing a combination service using a terminal capability version according to the present invention;

7 is a view showing a third embodiment of a method of performing a combination service using a terminal capability version according to the present invention;

The present invention relates to a combination service for simultaneously performing two or more services, and more particularly, to a method and system for performing a combination service using a terminal capability version.

The combination service is a service for simultaneously performing two or more services between a first user and a second user. In addition, the combination service may be a service which simultaneously performs at least two or more services in combination between two or more users in a first service based on a first network, a second service based on a second network, and a third service based on a third network. have.

In order to perform a combination service between the first user and the second user, the first user and the second user obtain information about the supportable service and the like and negotiate the available services between the first user and the second user. must be negotiated.

Here, as an example of a combination service, a combination of CS and IMS services will be described.

CSI is a service that simultaneously performs (combines) a CS (circuit switched) service and an IMS (IP multimedia subsystem) service between a first user and a second user. An IMS session for an IMS service may be added to a CS call established between a first user and a second user, and vice versa, a CS in an IMS session established between a first user and a second user. Calls may be added. IMS services that may be added to CS calls already established between the first user and the second user include one or more of IMS based services, such as instant messaging (IM), video sharing, data delivery, and the like.

1 illustrates a network configuration for providing a general combination service, for example, CSI, between a first terminal and a second terminal. As shown in FIG. 1, a general network for providing a combination service, for example, CSI, includes a first and a first service for supporting a CS service for CSI between the first terminal 10 and the second terminal 20. 2 CS core networks 31 and 32; First and second IMS core networks (41) (42) for supporting the IMS service for the CSI to the first terminal (10) and the second terminal (20); A first server (AS) 43 connected to the first IMS core network 41 to perform a specific function of an IMS session of the CSI of the first terminal 10, for example, a service based charging function. )Wow; A second server (44) connected to the second IMS core network (42) to perform a specific function (e.g., service based charging function) of the IMS session of the CSI of the second terminal (20); A first x-radio access network (xRAN) for connecting the first terminal 10 to the first CS core network and the first IMS core network; And a second radio access network (xRAN) 33 for connecting the second terminal 20 to the second CS core network 32 and the second IMS core network 42.

The network for providing the CSI includes a first packet switched (PS) core connected between the first radio access network 30 and the first IMS core network 41 to establish an IMS session of the CSI. Network 40; And a second PS core network 45 connected between the second radio access network 33 and the second IMS core network 42 to establish an IMS session of the CSI.

The first and second CS core networks 31 and 32 each include a mobile switching center (MSC), a visiting location register (VLR), and a home location register (HLR). do.

In a general network for providing the above CSI, a general CSI providing method will be described.

In the case of a CS call between the first terminal 10 and the second terminal 20, data and control signals are exchanged through the first and second CS core networks 31 and 32, and in the case of an IMS session, the first Data and control signals are exchanged through the PS core network 40 and the first IMS core network 41 and the second IMS core network 42 and the second PS core network 45.

The first terminal 10 includes a function for simultaneously connecting to the first CS core network 31 and the first PS core network 40, and the second terminal 20 includes a second CS core network 32. ) And the second PS core network 45 at the same time.

Before starting the CSI service between the first terminal 10 and the second terminal 20, the first terminal 10 and the second terminal 20, in order to grasp information about the supportable service and the like for the other party, The radio environment information and the terminal capability information of the current terminal are exchanged with each other.

The current radio environment information of the terminal is used as important information for the user to determine the behavior after the CS call setup.

The radio environment information is exchanged through the CS domain during CS call setup. Since the radio environment information is flexible and may differ depending on the environment at the time of the CS call setup, the exchanged radio environment information is used as valid information only for the duration of the CS call.

The radio environment information includes information indicating whether the terminal supports simultaneous use of the CS service and the PS (packet exchange) service.

In addition, the terminal capability information is used as information for determining whether a user in communication is to call a possible service of the other party. The terminal capability information is exchanged through the IMS domain.

2 shows a general method for exchanging terminal capability information between a first terminal and a second terminal.

The first terminal 10 transmits a session initiation protocol (SIP) OPTIONS message to the second terminal 20 to request capability information of the second terminal 20 (S21). The second terminal 20 stores address information of the first terminal 10 included in the SIP OPTIONS message (S22) and transmits a 200 OK message as a response message to the SIP OPTIONS message. The 200 OK message includes terminal capability information of the second terminal 20 (S23).

The first terminal 10 receiving the 200 OK message stores the terminal capability information of the second terminal 20 included in the 200 OK message (S24).

Meanwhile, when receiving the SIP OPTIONS message from the first terminal 10 and the second terminal 20 does not transmit the SIP OPTIONS message for requesting the terminal capability information to the first terminal 10, the second terminal 20. ) Determines to transmit a SIP OPTIONS message to the first terminal 10 to request the terminal capability information of the first terminal 10 (S25). When a SIP OPTIONS message for requesting terminal capability information of the first terminal 10 is transmitted from the second terminal 20, the first terminal 10 is an address of the second terminal 20 included in the SIP OPTIONS message. Information is stored (S26, S27), and a 200 OK message is transmitted to the second terminal 20 as a response message (S28). The 200 OK message includes capability information of the first terminal 10.

The second terminal 20 stores capability information of the first terminal 10 included in the 200 OK message transmitted from the first terminal 10 (S29).

In this way, the terminal capability information of the first terminal 10 and the terminal capability information of the second terminal 20 exchanged between the first terminal 10 and the second terminal 20 are fast service set up and network load during the next communication. In order to reduce, it is stored in the second terminal 20 and the first terminal 10, respectively.

In this way, in order for a specific terminal to know the terminal capability information of the opposite terminal, a SIP OPTIONS message for requesting the terminal capability information is transmitted to the opposite terminal, and a response message including the terminal capability information of the opposite terminal itself is transmitted from the opposite terminal. Should be received.

As described above, in the general CSI providing network, the terminal capability information exchange method allows each terminal to transmit a SIP OPTIONS message to the counterpart terminal once to identify and store the terminal capability information for the counterpart terminal.

Therefore, even in the case of the opposite terminal whose terminal capability information has not changed, one terminal transmits a SIP OPTIONS message to the opposite terminal, and receives the unchanged terminal capability information of the other terminal. Such an operation may be referred to as an unnecessary operation and becomes a factor of increasing network load.

In general, the terminal capability information of the terminal may be dynamically updated. The case where the terminal capability information of the terminal changes dynamically is as follows.

First, when various devices (e.g. cameras, etc.) are dynamically installed and detached in the terminal, and second, when registered in the IMS Service, third, the new codec is downloaded using the download service and the current terminal capability information of the terminal (Capability information) ) Is updated.

Capability Information defined in this way can be updated dynamically. After the update is made, if the cache of the terminal is not updated together due to the power ON / OFF, SIM Swap Off, Time Out, etc. of the terminal, the capability of the terminal stored in the cache of the terminal and the actual capability information of the terminal The situation is not consistent with the information. Therefore, when the terminal intends to use the counterpart terminal and CSI later, the terminal confirms that the capability information of the counterpart terminal is stored in its cache and does not have an OPTIONS process for knowing the capability information of the counterpart terminal. Immediately after Radio Capability Exchange, the terminal requests PoC service from the opposite terminal through an INVITE message transmission. When the counterpart terminal deregisters the PoC service, the PoC service request fails, and therefore, an OPTIONS process for recognizing each other's capability information must be performed again. That is, it is impossible to take advantage of the pre-stored terminal capability information of the opposite terminal in each terminal.

In addition, in the current mobile communication system, one subscriber may have multiple terminals, and in the case of public user identity, it may be simultaneously used in multiple SIMs. That is, one subscriber shares and uses the Mobile Station International Subscriber Directory Number (MSSISDN) to multiple terminals. In the case of the cache using only the public user identity, since it is impossible to determine which terminal of the other party the request was sent from, the user cannot actually proceed with the combination service that is the CSI.

The present invention has been proposed to solve the above problems, and an object of the present invention is to simplify a procedure of exchanging terminal capability information by transmitting a terminal capability version of each terminal and to perform a signaling procedure when establishing a connection of a combination service. The present invention provides a method and system for performing a combination service using a simplified terminal capability version.

Another object of the present invention is that each terminal maintains the terminal capability version at a unique value each time its terminal capability information is changed, and transmits the terminal capability version together at the time of connection establishment of the combination service, The present invention provides a method and system for performing a combination service using a terminal capability version that can accurately check whether the terminal capability information is changed and maintain cache consistency, thereby improving the efficiency of using the cache.

In order to achieve the above object, a method of simultaneously performing different services between at least two or more terminals, the method of performing a combination service according to the present invention comprises the steps of: exchanging a terminal capability version when a service connection request; And selectively performing the terminal capability information exchange procedure and the service connection establishment procedure by comparing the received terminal capability version with the stored terminal capability version.

In order to achieve the above object, a method of simultaneously performing different services between at least two or more terminals, the method of performing a combination service according to the present invention comprises the steps of: generating a terminal capability version according to the terminal capability information; Transmitting the terminal capability version when a service connection request is made.

In order to achieve the above object, an apparatus for performing a combination service with at least one terminal, the terminal according to the present invention, a storage device for storing at least the terminal capability version and terminal capability information of the other party; When the service is connected, the terminal capability version of the terminal is transmitted to the counterpart, and the terminal capability version of the counterpart received from the counterpart is compared with the stored terminal capability version of the counterpart, and the terminal capability information exchange procedure and service connection setup procedure are performed. It is characterized in that the configuration, including;

In order to achieve the above object, a method for simultaneously performing at least a first and a second service between at least two or more terminals, the method of performing a combination service according to the present invention, the originating terminal for the first service Transmitting with the first capability version included in the call establishment message; Receiving a connection response message including a second capability version from a called terminal; And confirming the received second capability version and the stored capability version of the called terminal by the calling terminal, transmitting a session connection request message for the second service.

Hereinafter, an embodiment of a method and system for performing a combination service using a terminal capability version according to the present invention will be described with reference to the accompanying drawings.

The present invention generates a unique terminal capability version using the current terminal capability information of the terminal. Thus, when establishing a connection service between at least two terminals, the terminal transmits its own capability version through a SIP signaling message or transmits its current radio capability environment during call setup. Send the capability version.

Accordingly, one terminal selectively performs the terminal capability information exchange procedure and the service connection establishment procedure by comparing the terminal capability version of the opposite terminal with the terminal capability version of the received opposite terminal and determining whether to update the terminal capability information of the opposite terminal. do.

First, the terminal capability information of the terminal will be described. The terminal capability information (capability set) includes at least one of the following contents.

Screen capabilities (indicates colors, resolution, size, etc.)

Memory / storage capacity (for downloading video / music / email attachments etc)

Capability to stream / download video and still images

Codec types (EFR, AMR, MPEG4, H.264, MP3, etc.)

Device software / firmware release / version

Calendar storage capacity

Contacts storage capacity

Notes storage capacity

-Devices' Operating System

Browser type (WAP 1.2 / 2.0, HTML)

MExE classmark (Mobile Execution Environment rank)

USIM Application Toolkit capabilities (release / version)

Data rate capability

SIP call control protocol

Number of simultaneous PDP contexts supported

Number of APN's supported

In the present invention, the terminal generates a unique terminal capability version using the terminal capability information as described above. That is, the terminal may generate a unique version of the terminal capability using its terminal capability information, a private user identity and a public user identity. Thus, when one user owns multiple terminals and those terminals use the same public user ID, each terminal using the same public user ID, based on the corresponding terminal capability versions of each terminal Each terminal capability information can be accurately distinguished.

In order to generate a unique version of the terminal capability according to the terminal capability information, the terminal may use a hash function and the like, and other methods may be used.

In addition, the terminal capability version may have a unique value of 1 byte according to the terminal capability information (Set of Capability). When the terminal capability version has a value of 1 byte, it is possible to represent 256 terminal capability information. The expressible number of such terminal capability versions can be extended according to the nature of the application.

In addition, the unique values of the terminal capability version may be represented in bit and digit form. The terminal capability version may also have a unique value in the form of a UE capability version-XX (UCV-XX). Here, "XX" may be a 2-digit hexadecimal number, as shown in [Table 1]. The "XX" may be a value in a range from hexadecimal "00" to hexadecimal "FF". The UCV-XX type terminal capability version is generated based on the terminal capability information by a CSI (CSI user agent).

The hexadecimal number XX is coded in the UE capability version information element.

The terminal stores a terminal capability version according to its terminal capability information in a storage device. Figure 3 shows a terminal with a storage device for storing a terminal capability version according to the current terminal capability information according to the present invention. The storage device may be a memory or a cache or a universal subscriber identity module (USIM).

Meanwhile, the terminal capability information of the terminal is dynamically updated. When the terminal capability information of the terminal is updated, for example, when a device (eg, a camera, etc.) is dynamically mounted and detached to the terminal, when the terminal is registered or released in an IMS (IP Multimedia Subsystem) service, This may be the case when a new codec is downloaded using a download service.

When the terminal capability information is updated (changed) as described above, the terminal generates a unique terminal capability version and the generated terminal capability version is stored in the storage device.

4 shows a method of generating a unique terminal capability version corresponding to the current terminal capability information according to the present invention.

When the hash function is used, the terminal inputs the updated terminal capability information into the hash function to generate a unique terminal capability version. In this case, the terminal may generate a unique terminal capability version by inputting the personal user ID and the public user ID together with the updated terminal capability information.

The terminal capability information (first terminal capability information) of the terminal, that is, the capability set includes screen capacities of 256 colors and 640 x 486 resolution, memory of 256 MB, enhanced full rate (EMR), and AMR ( When configured with a codec type including Adaptive Multi-Rate, Motion Picture Experts Group 4 (MPEG4), and H.264, and a browser type of WAP 1.2, the terminal transmits the first terminal capability information as described above to a hash function. Generate a first terminal capability version with a unique specific value. As shown in FIG. 4, the first terminal capability version is, for example, 0100 1000.

When the camera is mounted on the terminal, the terminal generates a second terminal capability version by inputting terminal capability information (second terminal capability information) to which a camera function is added to the hash function. The second terminal capability version generated at this time is, for example, 0100 1001.

When the browser type is updated to WAP 2.0, the terminal generates a third terminal capability version using the terminal capability information (third terminal capability information) whose browser type is updated. The third terminal capability version is, for example, 0101 1000.

As described above, whenever the terminal capability information is dynamically changed, the terminal changes its terminal capability version to have a unique value. Therefore, it is possible to easily check whether or not the terminal capability information of the corresponding terminal has been changed based on the change of the terminal capability version.

In the present invention, when the terminal capability information of the terminal is exchanged through a Session Initiation Protocol (SIP) signaling message (for example, an OPTIONS message, an INVITE message, or the like) or during the call setup, the current Radio Capability Environment is exchanged. In doing so, each terminal transmits its own terminal capability version to the counterpart terminal. The terminal capability information version thus exchanged is stored in each terminal together with the exchanged terminal capability information and the public user ID.

Subsequently, when establishing a service connection for the combination service, that is, CSI, if the terminal capability version value of the stored counterpart terminal is compared with the received version value, the terminal of one side will inform that the stored terminal capability information should be updated. Can be. When the terminal capability version value and the received version value of the stored counterpart terminal are different, when the storage device of one terminal, for example, SIM (or USIM) is replaced, the terminal capability information of the counterpart terminal may be dynamically changed. Cases may be included.

On the other hand, as another method for maintaining the consistency of the storage device for storing the terminal capability information, in the present invention, when the terminal capability information of the terminal is dynamically changed to the terminal of the public user ID stored in the storage device, such as LBS The method of transmitting the changed contents using the method may be used.

5 shows a first embodiment of a method of performing a combination service using a terminal capability version according to the present invention.

As shown in FIG. 5, a system for performing a combination service using a terminal capability version, when connecting the first service to perform the combination service composed of at least a first service and a second service, respectively, First and second terminals 100 for exchanging the terminal capability versions of each other, and checking the received terminal capability version and the stored terminal capability version and requesting updated terminal capability information from the opposite terminal if the two do not match. 200) is configured to include.

The system includes a first service network for providing the first service to the first terminal 100 and the second terminal 200, and the second service to the first terminal 100 and the second terminal ( It further comprises a second service network for providing to 200).

When the first service is an IMS service, the first service network includes: a first IMS core network (410) for providing an IMS service to the first terminal (100); It is configured to include a second IMS core network 420 for providing the IMS service to the second terminal 200.

When the second service is a CS service, the second service network (not shown) includes: a first CS core network (not shown) for providing a CS service to the first terminal (100); It is configured to include a second CS core network (not shown) for providing the CS service to the second terminal 200.

Each of the first and second terminals 100 and 200 stores a terminal capability version of the terminal, a terminal capability information and a terminal capability information version of the counterpart when the service is previously connected with the counterpart, and a counterpart user ID. A storage device (see FIG. 3); Sending the terminal capability version of its own to the counterpart when connecting the first service, and comparing the terminal capability version received from the counterpart with the terminal capability version of the counterpart stored in the storage device. And a processor (not shown) for selectively performing a setting procedure.

Now, referring to FIG. 5, a first embodiment of a method of performing a combination service using a terminal capability version according to the present invention will be described. The method shown in FIG. 5 shows an example of setting up an IMS session and then setting up a CS call when setting up a CSI connection as a combination service.

The first terminal 100 and the second terminal 200, for example, a combination service, exchange terminal capability information with each other through a CSI service, and store the terminal capability information of each other. The first and second terminals 100 and 200 are respectively. At least the opponent's public user identity, the terminal capability version of the opponent, and the terminal capability information of the opponent are stored. The terminal capability information of the opponent may be, for example, Supportable Codec or File Format (S51).

Then, the first terminal 100 and the second terminal 200 releases the session after performing data exchange and voice exchange through the CSI service (S52).

At this time, the first terminal 100, at least, the public user ID of the second terminal 200 exchanged during the CSI setting process, the terminal capability version of the second terminal 200, the terminal capability of the second terminal 200 Information, the terminal capability version of the first terminal 100 itself is stored. Information related to the terminal capability information of the first terminal 100 is stored in the second terminal 200 in the same manner. Information stored in the first terminal 100 is used when the first terminal 100 intends to perform a CSI service with the second terminal 200 later.

Thereafter, terminal capability information of one terminal, for example, terminal capability information of the first terminal 100 may be changed for various reasons. That is, IMS services (eg, PoC, IM (Instant Messaging), Broadcast, etc.) that are being used (Register) or Register (De-Register) or multimedia equipment such as Camera is dynamically created. 1 When the terminal 100 is mounted or detached, a new Codec or a supported file format is modified by using a download service, or a multimedia message service (MMS) service or the like is updated, the first terminal 100 is updated. The terminal capability information of is changed (S53).

When the terminal capability information thereof is changed in this way, the first terminal 100 changes its terminal capability version (S54). At this point, the actual terminal capability version of the first terminal 100 and the terminal capability version of the first terminal 100 stored in the second terminal 200 do not match. For example, when the previous terminal capability version of the first terminal 100 is V.0.12 and the current terminal capability version is changed to V.1.12 due to the change of the terminal capability information, the current of the first terminal 100 The terminal capability version of the terminal does not coincide with V.0.12, which is the terminal capability version of the first terminal 100 stored in the second terminal 200 (S55).

Thereafter, when the first terminal 100 wants to perform CSI service with the second terminal 200 again, the first terminal 100 attempts a session connection for the IMS service. At this time, the first terminal 100 confirms that the information of the second terminal 200 as the counterpart terminal is stored therein, and immediately attempts to execute the session setup through the INVITE message transmission without exchanging the terminal capability information.

The first terminal 100 generates the INVITE message with reference to the information of the second terminal 200 stored therein and transmits the INVITE message to the second terminal 200. The information of the second terminal 200 includes at least the public user ID and the terminal capability information of the second terminal 200. In addition, the first terminal 100 includes its current terminal capability version (for example, V.1.12) in the INVITE message.

The INVITE message is transmitted from the first terminal 100 to the second terminal 200 through the first IMS core network 410 and the second IMS core network 420 (S56).

The second terminal 200 confirms the terminal capability version of the first terminal 100 included in the INVITE message. The second terminal 200 compares the received terminal capability version of the first terminal 100 with the terminal capability version of the first terminal 100 previously stored. According to the comparison result, the second terminal 200 selects one of a terminal capability information exchange procedure and a response message transmission procedure for the IMS session connection request (S57).

When the received terminal capability version and the stored terminal capability version coincide with each other, the second terminal 200 determines that the current terminal capability information of the first terminal 100 has not changed since the previous CSI service is performed. In response to the INVITE message, a 200 OK message is transmitted (not shown).

However, when the received terminal capability version and the stored terminal capability version do not coincide with each other, the second terminal 200 determines that the current terminal capability information of the first terminal 100 has changed since the previous CSI service is performed. And performs a terminal capability information exchange procedure. That is, the second terminal 200 transmits an OPTION request message to request the changed terminal capability information of the first terminal 100. The OPTION request message includes the current terminal capability version of the second terminal 200.

The OPTION request message is transmitted to the first terminal 100 through the first and second IMS core networks 410 and 420 (S58).

The first terminal 100 receiving the OPTION request message transmits its own terminal capability information to the second terminal 200, and the second terminal 200 transmits the newly changed terminal capability information of the first terminal 100. Save it. Accordingly, the first terminal 100 and the second terminal 200 store the terminal capability information and the terminal capability version of the counterpart so as to match the actual terminal capability information and the terminal capability version of the counterpart.

Thereafter, the first terminal 100 and the second terminal 200 may perform a CSI service through CS call setup.

Whenever the terminal capability information of the terminal is changed, the terminal capability version is maintained as a unique value and the terminal capability version is transmitted to the counterpart to confirm whether the terminal capability information of each terminal is changed and to request the changed terminal capability information. The storage device of each terminal can be efficiently and stably used.

6 shows a second embodiment of a method of performing a combination service using a terminal capability version according to the present invention.

As shown in FIG. 6, a system for performing a combination service according to the present invention includes first and second terminals 100 and 200, first and second IMS core networks 410 and 420, and a second system. It comprises a first and second CS core network (310, 320).

The method of performing a combination service shown in FIG. 6 shows a case in which an IMS session is established after establishing a CS call first when the combination service is a CSI service.

Step S61 is performed in the same manner as steps S51 and S52 in FIG. 5. When the CSI service is completed between the first terminal 100 and the second terminal 200 as described above, the first terminal 100 and the second terminal 200 are exposed to the other terminal, as described in FIG. 5. The user ID, the terminal capability information, and the terminal capability version are stored, respectively (S61).

For example, assume that the following information is stored in the first terminal 100.

Second terminal; bobs@lge.com; text-audio-video-mpeg-typeofcodec-etc; v.3.3

Here, the public user ID of the second terminal, that is, the URI is bobs@lge.com, and supportable terminal capability information is text, audio, video, mpeg and various codecs, and the terminal capability version of the second terminal is currently v. 3.3.

Thereafter, each terminal capability information of the first terminal 100 and the second terminal 200 may be dynamically changed. As an example, the case where the terminal capability information of the first terminal 100 is changed will be described. (In this case, when the terminal capability information is changed, as described above in the method description of FIG. 5, IMS service registration and termination, Device and detachment of the multimedia device).

When its own terminal capability information is changed, the first terminal 100 generates a new terminal capability version having a unique value using the changed terminal capability information (S62) (S63). If the previous terminal capability version was V.0.12, the newly created (modified) terminal capability version may be V.1.12.

Thereafter, when the first terminal 100 wants to first set up a CS call to perform CSI again with the second terminal 200, the first terminal 100 transmits a call setup message.

The call setup message includes at least a terminal capability version of the first terminal 100. In one example, the terminal capability version of the first terminal 100 is V.1.12.

The call setup message is transmitted to the second terminal 200 through the first and second CS core networks 310 and 320 (S64).

The second terminal 200 transmits a connection message Connect which is a response message to the call setup message. The connection message includes at least a terminal capability version of the second terminal 200. The terminal capability version may be, for example, V.3.3. The connection message is transmitted to the first terminal 200 through the first and second CS core networks 310 and 320 (S65).

After the CS call is set up as described above, in order to establish an IMS session, the first terminal 100 includes a terminal capability version of the second terminal 200 which is stored in advance, and a second terminal (received when the CS call is set up). Compare the terminal capability version of 200). According to the comparison result, the first terminal 200 selects one of the terminal capability information exchange procedure and the IMS session establishment procedure (S66).

That is, when the stored terminal capability version and the received terminal capability version do not match, the first terminal 100 changes the current terminal capability information of the second terminal 200 from the terminal capability information when performing the previous CSI service. I think it is. The first terminal 100 transmits an OPTION request message to the second terminal 200 to request the changed terminal capability information of the second terminal 200 (not shown in FIG. 6).

However, when the stored terminal capability version and the received terminal capability version match, the first terminal 100 determines that the current terminal capability information of the second terminal 200 is the second terminal 200 when performing the previous CSI service. It is determined that it matches the terminal capability information.

Accordingly, the first terminal 100 transmits the INVITE message for requesting the establishment of the IMS session to the second terminal 200, not the OPTION request message for the terminal capability information exchange.

The INVITE message includes at least a terminal capability version of the first terminal 100. At this time, the terminal capability version of the first terminal 100 is, for example, V.1.12.

The INVITE message is transmitted to the second terminal 200 through the first and second IMS core networks 410 and 420 (S67).

Then, the second terminal 200 compares the terminal capability version of the first terminal 100 received through the INVITE message with the terminal capability version of the first terminal 100 stored therein. According to the comparison result, the second terminal 200 selects one of a terminal capability information exchange procedure and an IMS session connection procedure. Here, the second terminal 200 selects one of the terminal capability information request of the first terminal 100 and the response to the IMS session connection request (S68).

That is, when the terminal capability version of the received first terminal 100 and the stored terminal capability version of the first terminal 100 coincide with each other, the second terminal 200 has the terminal capability information of the first terminal 100. It is determined that it matches the terminal capability information of the previous CSI service, and transmits a 200 OK message which is a response message to the INVITE message (not shown in FIG. 6).

However, if the received terminal capability version of the first terminal 100 and the stored terminal capability version of the first terminal 100 do not match, that is, the received terminal capability version is V.1.12 and the stored terminal capability If the version is V.0.12, the second terminal 200 determines that the current terminal capability information of the first terminal 100 does not match the terminal capability information of the previous CSI service. That is, the second terminal 200 determines that the current terminal capability information of the first terminal 100 has changed. Thus, the second terminal 200 transmits an OPTION request message to request the changed terminal capability information of the first terminal 100 (S69). The OPTION request message may include a terminal capability version of the second terminal 200.

Upon receiving the OPTION request message, the first terminal 100 transmits its changed terminal capability information to the second terminal 200 through the OPTION response message.

In this way, the second terminal 200 stores the changed terminal capability information of the first terminal 100. Therefore, consistency between the current terminal capability information of the first terminal 100 and the terminal capability information of the first terminal 100 stored in the second terminal 200 is maintained.

Thereafter, the first terminal 100 and the second terminal 200 establish an IMS session and exchange actual data (media).

In this way, the first terminal 100 and the second terminal 200 solve the problem of inconsistency between the pre-stored information and the received information using the terminal capability version that is uniquely maintained according to the respective terminal capability information. It is also possible to simplify the signaling procedure for the combination service connection.

On the other hand, in general, a user owns a plurality of terminals, and the terminals may use the same public user ID. In this case, in a general combination service system, each terminal stores terminal capability information according to a public user ID (for example, a URI), so that each terminal capability information of a plurality of terminals using the same public user ID (for example, a URI) is used. Since it is not possible to distinguish, a problem of inconsistency of the terminal capability information occurs.

However, the present invention generates a unique terminal capability version by inputting the public user ID of the terminal, the personal user ID of the terminal, and the terminal capability information of the terminal into a hash function as an example. Thus, even when a user uses the same URI with multiple terminals, a unique version of the terminal capability is generated according to the terminal capability information of each terminal.

Accordingly, according to the present invention, each terminal has a unique different terminal capability version according to each terminal capability information, and it is possible to distinguish each terminal capability information of the multiple terminals and the terminals using the same public user ID. It becomes possible.

In addition, since the calling party checks the information of the called party already stored, and determines whether the terminal capability information is updated, the terminal capability information exchange procedure is performed. When the call forward function is set, an unnecessary terminal capability information exchange procedure is performed.

However, when the terminal capability version is exchanged during call setup or session setup according to the present invention, the receiving side (calling party or called party) receiving the terminal capability version compares the received terminal capability version with the prestored terminal capability version. By determining whether the terminal capability information is updated, it is possible to solve the problem of using an additional service such as call transfer.

7 shows a third embodiment of a method of performing a combination service using a terminal capability version according to the present invention. As shown in FIG. 7, when a combination service is to be performed between at least a first user and a second user, for example, the second user owns a plurality of terminals using the same public user ID. An example will be described.

As shown in FIG. 7, in the system for performing a combination service according to the present invention, a first user uses a first terminal 100, and a second user uses a plurality of terminals, that is, a 2-1 terminal ( 210 and the second-2 terminal 220 are used. The 2-1 terminal 210 and the 2-2 terminal 220 uses the URI as an example of the same public user ID. The method of performing the combination service illustrated in FIG. 7 illustrates an example in which a CS call is first established and then an IMS session is established when the combination service is a CSI service. In addition, the second user shows a case in which a call switching function for switching a call to be received to the second terminal 220 is set. The 2-1 terminal 210 and the 2-2 terminal 220 continue to maintain the same terminal capability information, and the first terminal 100 shows an example in which the terminal capability information is dynamically updated.

The first terminal 100 of the first user has previously performed the CSI service with the second-2 terminal 220 of the second user, and thus, the first terminal 100 and the second-2 terminal 220. In each state, the public user ID, the terminal capability information, and the terminal capability version of the counterpart are stored.

Thereafter, the first terminal 100 performs a CSI service with the 2-1 terminal 210 of the second user, and connects the CSI service to the first terminal 100 and the 2-2 terminal 210. The public user ID, the terminal capability information, and the terminal capability version of the counterpart exchanged at the time of setting are stored (S71).

That is, in the first terminal 100, the public user ID, the terminal capability information, and the terminal capability version of the second-1 terminal 210 are stored (shown in FIG. 7), and the second-2 terminal 220 is stored. The public user ID, the terminal capability information, and the terminal capability version of the terminal are stored (not shown in FIG. 7). At this time, the terminal capability version of the first terminal 100 is, for example, 0010 1010.

Subsequently, when the terminal capability information of the first terminal 100 is changed, such as mounting or detaching a multimedia device such as a camera, the first terminal 100 uses the changed terminal capability information of the first terminal 100 to recreate a unique terminal capability version. It generates (S72). In this case, the generated terminal capability version of the first terminal 100 is 1000 0101, for example.

When the first terminal 100 whose terminal capability information has been changed wants to perform CSI service with the 2-1 terminal 210, the 2-1 terminal 210 changes the terminal capability of the first terminal 100. Recognize that the current terminal capability information of the first terminal 100 has been changed through the version. Thus, the 2-1 terminal 210 requests and receives changed terminal capability information of the first terminal 100.

Thereafter, the second user registers a call transfer function to transfer the call to the 2-2 terminal 220 in the case of the call received by the 2-1 terminal 200 (S75).

Subsequently, when the first terminal 100 wants to perform a CSI service with the second user, that is, the 2-1 terminal 220, the first terminal 100 is the 2-1 terminal 210 of the second user. Send a call setup message. The call establishment message includes the current terminal capability version of the first terminal 100. In this case, the terminal capability version is 1000 0101, for example.

The call setup message is transmitted to the second-2 terminal 220 of the second user by the registered call transfer function (S76).

The second-2 terminal 220 transmits a connection message CONNECT to the first terminal 100 as a response message to the received call setup message (S77). The connection message includes at least a terminal capability version of the second-2 terminal 220. The terminal capability version of the second-2 terminal 220 is, for example, 1000 1001.

In this way, a CS call is established between the first terminal 100 and the second-2 terminal 220.

The first terminal 100 compares the received terminal capability version of the second-2 terminal 220 with the stored terminal capability version of the second-2 terminal 220. According to the comparison result, the first terminal 100 selects one of a terminal capability information exchange procedure and an IMS session connection establishment procedure.

If the received terminal capability version of the second-2 terminal 220 and the terminal capability version of the stored second-2 terminal 220 do not match, the first terminal 100 of the second-2 terminal 220. It is determined that the terminal capability information has been changed since the previous CSI service is performed, and an OPTION request message for exchanging terminal capability information is transmitted (not shown).

However, when the terminal capability version of the received second-2 terminal 220 and the terminal capability version of the stored second-2 terminal 220 coincide with each other, the first terminal 100 determines that the second-2 terminal ( It is determined that the terminal capability information of 220 has not been changed (S78).

Meanwhile, the second-2 terminal 220 compares the received terminal capability version of the first terminal 100 with the stored terminal capability version of the first terminal 100. If the received terminal capability version and the stored terminal capability version do not match, that is, the received terminal capability version is 1000 0101 and the stored terminal capability version is 1000 0100, the second-2 terminal 220 Determines that the current terminal capability information of the first terminal 100 has changed since the previous CSI service was performed. Thus, the second-2 terminal 220 exchanges terminal capability information in order to match the terminal capability information of the first terminal 100 previously stored with the actual (modified) terminal capability information of the first terminal 100. Decide to carry out the procedure. The terminal capability information exchange procedure is started by sending an OPTION request message. The second-2 terminal 220 transmits an OPTION request message to the first terminal 100 to request the changed terminal capability information of the first terminal 100 (S80).

Upon receiving the OPTION request message, the first terminal 100 transmits its changed terminal capability information through the OPTION response message. The OPTION response message also includes a terminal capability version of the first terminal 100.

The second-2 terminal 220 receives and stores the changed terminal capability information of the first terminal 100 through the OPTION response message.

Thereafter, the first terminal 100 and the second-2 terminal 220 establish an IMS session to exchange media data.

The present invention recognizes a terminal whose terminal capability information has changed using the terminal capability version, and requests the terminal capability information only from the terminal whose terminal capability information has changed. Therefore, according to the present invention, steps S82 and S83, which are general procedures for requesting the terminal capability information from the terminal whose terminal capability information has not been changed, do not need to be performed.

In addition, when the terminal capability information of at least one terminal has been changed since the previous CSI service is performed between two terminals that have performed the CSI service, whether the terminal capability information of each terminal is accurately changed using the terminal capability version. In addition, the terminal capability information stored in the local area (storage device) of each terminal can be updated to prevent unnecessary signaling procedures (for example, steps S84 and S85) when establishing an IMS session.

If a user has a plurality of terminals using the same public user ID, a unique different terminal capability version is generated according to the terminal capability information of each terminal, and this terminal capability version is used during call setup or session setup. By exchanging, it is possible to confirm whether the terminal capability information of the opposite terminal is changed in both the calling terminal and the called terminal. Therefore, the problem that occurs when using an additional service such as call transfer can be solved.

As described above, the present invention maintains a unique terminal capability version whenever the terminal capability information of each terminal is changed, and transmits the terminal capability version including the terminal capability version in the service connection establishment message. Comparing the stored terminal capability information of the opposite terminal with the received terminal capability version of the opposite terminal has an effect that it is possible to determine whether the terminal capability information of the opposite terminal is changed.

In addition, the present invention, if the change of the terminal capability information is confirmed based on the terminal capability version of the other terminal received, by requesting and receiving the changed terminal capability information to the terminal changed terminal capability information to maintain the consistency of its local storage device It is possible to reduce the signaling for the terminal capability information exchange procedure.

In addition, the present invention can check whether or not the terminal capability information of the opposite terminal is changed, and can select one of the terminal capability information exchange procedure and the service connection establishment procedure according to the result of confirmation, thus simplifying the signaling for service connection establishment. have.

According to the present invention, even when a user owns a plurality of terminals using the same public user ID and registers a call transfer function of the called terminal, both the calling terminal and the called terminal change whether the terminal capability information of the other terminal is changed. As it can be accurately confirmed, there is an effect that can solve the problem of misuse of the local storage of each terminal.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (28)

In the method of simultaneously performing different services between at least two or more terminals, Exchanging a terminal capability version when a service connection request is made; And selectively performing a terminal capability information exchange procedure and a service connection establishment procedure by comparing the received terminal capability version with a stored terminal capability version. 2. The method of claim 1, wherein the terminal capability version, Whenever the terminal capability information of the terminal is changed, a method of performing a combination service, characterized in that it is changed to a unique value. The method of claim 2, wherein the terminal generates its terminal capability version by inputting its terminal capability information to a hash function. The method of claim 2, wherein the terminal generates unique terminal capability information using the terminal capability information, its public user ID, and a personal user ID. The method of claim 1, wherein the exchanging of the terminal capability version comprises: Transmitting the terminal capability version of the calling terminal in the request message for requesting the service connection; And including the terminal capability version of the called terminal in the response message and transmitting the response message. The method of claim 1, wherein the selectively performing process, Selecting the service connection establishment procedure when the received terminal capability version and the stored terminal capability version match; Selecting the terminal capability information exchange procedure if the received terminal capability version and the stored terminal capability version do not match; and performing the combination service. 7. The method of claim 6, wherein when the two versions coincide with each other, an INVITE message is transmitted. 7. The method of claim 6, wherein the OPTION message is transmitted when the two versions do not coincide with each other. In the method of simultaneously performing different services between at least two or more terminals, Generating a terminal capability version according to the terminal capability information; And transmitting the terminal capability version when a service connection request is made. The method of claim 9, wherein the generating of the terminal capability version comprises: And generating a terminal capability version uniquely using the changed terminal capability information when the terminal capability information is changed. The method of claim 9, wherein the terminal capability version, Method of performing a combination service, characterized in that it has a unique value different according to the terminal and the terminal capability information of the terminal. The method of claim 9, wherein the transmitting of the terminal capability version comprises: And performing at least one of transmitting the terminal capability version when a call service connection request is made, and transmitting the terminal capability version when an IMS service connection request is made. The method of claim 9, wherein the terminal capability version, A method for performing a combination service, characterized in that transmitted in a call establishment message for a call service connection request or a connection message which is a response thereof. The method of claim 9, wherein the terminal capability version, Method for performing a combination service, characterized in that the transmission is included in the INVITE message or OPTION message. An apparatus for performing a combination service with at least one or more terminals, the apparatus comprising: A storage device for storing at least the other party's terminal capability version and terminal capability information; When the service is connected, the terminal capability version of its own is transmitted to the counterpart, and the terminal capability version of the counterpart received from the counterpart is compared with the stored terminal capability version of the counterpart, and thus the terminal capability information exchange procedure and service connection setup procedure are performed. And a processor that selectively performs the terminal. The method of claim 15, wherein the storage device, And at least one of a memory and a SIM. The method of claim 15, wherein the storage device, And storing the terminal capability version of the terminal further. The method of claim 15, wherein the storage device, And storing the public user ID of the counterpart. The method of claim 15, wherein the processor, And if the received terminal capability version of the counterpart and the stored terminal capability version of the counterpart coincide with each other, performing the service connection establishment procedure. The method of claim 15, wherein the processor, And when the terminal capability version of the received counterpart and the stored terminal capability version of the counterpart do not coincide with each other, performing the terminal capability information exchange procedure. 16. The method of claim 15, wherein the terminal capability version of its own, Terminal having a unique value according to the terminal capability information of the terminal itself. The terminal capability version of claim 15, And a unique value according to the terminal capability information of the counterpart terminal. In the method for simultaneously performing at least a first and a second service between at least two or more terminals, Transmitting by the originating terminal including a first capability version in a call setup message for the first service; Receiving a connection response message including a second capability version from a called terminal; And confirming the received second capability version and the stored capability version of the called terminal by the calling terminal, transmitting a session connection request message for the second service. How to perform the service. 24. The method of claim 23, wherein said session connection request message comprises at least said first capability version of said originating terminal. The method of claim 23, If the received second capability version and the capability version of the called terminal do not coincide with each other, the calling terminal transmits a request message for requesting the changed terminal capability information of the called terminal; Method of performing a combination service characterized in that. The method of claim 23, Checking the first capability version received by the called terminal and the capability version of the calling terminal stored in the called terminal through the connection request message; And selectively transmitting a response message of the connection request message and a terminal capability information request message for requesting terminal capability information of the calling terminal according to the verification result. The method of claim 23, wherein the first capability version is Combination service performing method characterized in that when the terminal capability information of the calling terminal is changed. The method of claim 23, wherein the second capability version is: Combination service performing method characterized in that when the terminal capability information of the called terminal is changed.

Images