KR20120043595A - Communication system for presenting information service of call state, packet service system thereof, apparatus thereof and method thereof - Google Patents

Abstract

PURPOSE: A communication system and packet service system are provided to offer announcements for call state information of a reception terminal by receiving session connecting messages by transmitting the call state information. CONSTITUTION: A reception terminal(402) receives a session connecting request message on the line. The reception terminal transmits a session connecting request confirmation message. The session connecting request confirmation message includes call state information which displays the session connecting request state of a calling terminal. A packet service system(100) provides announcements to the calling terminal according to the call state information of the session connecting request confirmation message. The announcement guides the call state information in order to connect sessions.

Description

A communication system for providing a call state guidance service, a packet service system for the same, an apparatus for the same, and a method therefor {communication system for presenting information service of call state, packet service system, apparatus apparatus and method}

The present invention relates to an additional service providing technology in a communication system, and more particularly, when a called terminal has a call request to the called terminal when the called terminal is in a call with a third terminal, the called terminal is busy or connected to a session. The present invention relates to a communication system for providing a guide broadcast for guiding a calling terminal to wait, and a packet service system for the same, an apparatus therefor, and a method therefor.

IMS (IP Multimedia Subsystems), which was initially developed for Internet Protocol (IP) multimedia services in third generation mobile communication networks, is now becoming a core technology for providing new services in next generation communication environments based on All IP.

The need for service control through IMS in packet-based networks can be found in service quality, billing, and convergence of different services. All multimedia services can be provided over an existing Internet connection, but this is limited to best-effort services that do their best but do not guarantee quality. For example, streaming data is transmitted in streaming format but does not guarantee its quality against delays by the network. However, in the case of the IMS network, the quality of the session can be guaranteed by performing resource allocation for the session. That is, the IMS network performs packet switching.

The IMS network also enables proper charging for sessions. It is possible to provide an appropriate charging method according to the type and quality of the service, the characteristics of the user, the policy of the network operator and the service provider, rather than the charge based on the flat fee or the packet volume. In addition, the IMS network can easily create a new service through an open interface protocol, and provide an environment in which a new service can be created by combining with an existing service.

The above-mentioned point provides an IMS network that provides both network operators and service providers with control and billing capabilities for services, and provides users with the means to perform all their services when roaming as well as in their home network. Show characteristics. This is the reason why IMS defined for mobile communication is becoming the basic control platform in all IP based wired / wireless integration environment.

By introducing an IMS network, which is a packet switching-based packet service system, it is possible to provide mobile voice over IP (mVoIP) services as a packet-based voice call service to users. However, the All IP environment has not yet been fully implemented, and if all the new infrastructure is built to provide additional services for packet-based voice call service, it is necessary to make redundant investment in the same infrastructure and to build the infrastructure. Time and money can be burdensome.

On the other hand, the conventional voice call service provides a variety of additional services, and when the calling terminal requests a call connection to the called terminal of the conventional additional services, when the called terminal is busy, the user of the called terminal is called It can be seen that the call is requested to connect to, the call with the other party who was on the call can be suspended, and a call with the calling terminal requesting a new call can be connected. However, the supplementary service cannot determine whether the called terminal is in a call state on the calling terminal, and thus, before the called terminal accepts the call connection, the user of the calling terminal attempts to make a new call because the user of the calling terminal cancels the call connection request. In many cases, no call connection is established between the calling terminal and the called terminal.

Accordingly, an object of the present invention in view of the above-described point is a communication system capable of providing information on a call state of a called terminal to a calling terminal requesting a call connection to a called terminal in communication with a third terminal through an announcement broadcast; The present invention provides a packet service system, an apparatus therefor, and a method therefor.

In addition, another object of the present invention is to provide information on the call state to the destination terminal through the announcement broadcast consistently in the packet service system and circuit service system using a service profile synchronized between the packet service system and the circuit service system. The present invention provides a communication system, a packet service system for the same, an apparatus therefor, and a method therefor.

Communication system for providing a call state guide service according to a preferred embodiment of the present invention for achieving the above object, the originating terminal for transmitting a session connection request message requesting a session connection for a call with the called terminal; Receiving the session connection request message during a call, the called terminal transmitting a session connection request confirmation message including call state information indicating that the call can accept the session connection request from the calling terminal; And a packet service system for providing a guide broadcast to the calling terminal to guide the called terminal waiting for a call or session connection according to the call state information of the session connection request confirmation message.

Packet service system for providing a call state guidance service according to a preferred embodiment of the present invention for achieving the above object, the session connection request message for the originating terminal requesting a session connection for a call with the called terminal; A session controller for relaying to the called terminal; A media device for providing announcement to the calling terminal; And in response to the session connection request message from the called terminal, receiving the session connection request confirmation message including call state information indicating that the called terminal can accept a session connection request of the calling terminal or the calling terminal. And an additional service controller for requesting the media device to provide the calling terminal with a guide broadcast that guides the called terminal to wait for a call or session connection according to the status information.

The additional service controller causes a session for broadcasting between the calling terminal and the media device to be connected, and when the session for broadcasting is connected, requesting that the media device provide the announcement broadcast to the calling terminal through a connected session. Characterized in that.

The media device may include a multimedia resource processor that provides the announcement through a connected session when the calling terminal and the session for broadcasting are connected; And a multimedia resource controller controlling the multimedia resource processor to provide the announcement.

The session connection request confirmation message is a 180 ringing message according to Session Initiation Protocol (SIP), and the call state information is described in an Alert-Info header of the 180 ringing message.

An additional service controller for providing a call state guidance service according to a preferred embodiment of the present invention for achieving the above object, the originating terminal receives the session connection request message for requesting a session connection with the called terminal; A communication module for receiving a session connection request confirmation message including call state information indicating that the called terminal can accept a session connection request of the calling terminal or the calling terminal from a called terminal; And generating, according to the call state information, a message requesting the calling terminal to provide a call announcement to the calling terminal, which guides the called terminal to wait for a call or a session connection, and transmits the message through the communication module. It includes a control module.

A terminal for providing a call state guide service according to a preferred embodiment of the present invention for achieving the above object, the communication unit for receiving a session connection request message for requesting a session connection from the originating terminal; And when receiving the session connection request message, generating a session connection request confirmation message including call state information indicating that the mobile terminal is in a call with a third terminal or accepts the session connection request of the calling terminal when the call is received. And a control unit for controlling to transmit the data through the communication unit.

The session connection request acknowledgment message is a 180 ringing message according to SIP, and the call state information is described in an Alert-Info header of the 180 ringing message.

The terminal may further include an input unit configured to receive an input of a user, wherein the controller is configured to suspend a call in communication with the third terminal when receiving an input for accepting a session connection with the calling terminal through the input unit. The session change request message is transmitted through the communication unit.

When the call with the third terminal is suspended according to the transmission of the session change request message, the controller exchanges a message for session connection with the calling terminal through the communication unit so that the session with the calling terminal is connected. It features.

A method for providing a call state guidance service of an additional service controller according to a preferred embodiment of the present invention for achieving the object as described above, the originating terminal receives a session connection request message requesting a session connection with the called terminal Receiving a session connection request confirmation message including call state information indicating that the called terminal is busy; Determining whether the session connection request message includes call state information indicating that the called terminal is busy or accepts the session connection request of the calling terminal; If the call result includes the call state information, connecting a session for broadcasting between a media device and the calling terminal; And when the session for broadcasting is connected, requesting, by the media device, the connected terminal to provide the announcement broadcast to the calling terminal to guide the called terminal waiting for a session connection with the called terminal through a connected session. It includes;

According to a preferred embodiment of the present invention, there is provided a method for providing a call state guidance service of a terminal, when receiving a session connection request message for requesting a session connection from an originating terminal. Determining whether a call is in progress with the terminal; Generating a session connection request acknowledgment message including call state information indicating that the call can accept a session connection request from the calling terminal when the call is busy; And transmitting a session connection request confirmation message including the call state information.

The session connection request acknowledgment message is a 180 ringing message according to SIP, and the call state information is described in an Alert-Info header of the 180 ringing message.

After the transmitting, if a user input of accepting a session connection with the calling terminal is detected, transmitting a session change request message for holding a call on the third terminal; And when the call is suspended according to the session change request message, transmit a session connection acceptance message to accept the session connection in response to the session connection request message, and receive a session connection acceptance confirmation message to confirm the session connection acceptance message. Connecting a session with the originating terminal.

The session change request message is a re-INVITE message according to SIP.

According to the present invention, when the called terminal receives a session connection request message for requesting a call from the calling terminal when the called terminal is busy with the third terminal, the called terminal accepts the session connection request from the calling terminal or the calling terminal. Send call state information indicating that it can. Accordingly, the packet service system may provide a call announcement requesting the calling terminal to wait for the session connection because the called terminal is busy or the called terminal will accept the session connection request. The announcement is information that can be used to determine whether to keep the session connection request state or to cancel the session connection request to the user of the calling terminal that is waiting for the call. Providing such a guide broadcast has an advantage of improving user convenience.

In addition, the additional service controller receives and stores the service profile of the home location register of the circuit service system and maintains the synchronization of the stored service profile and the service profile of the circuit service system. Then, the additional service controller may check whether the called terminal is subscribed to the call state guide service through the service profile synchronized with the service profile of the circuit service system. Accordingly, the additional service controller may provide a call state guide service to the called terminal subscribed to the call state guide service. As such, the packet service system and the circuit service system use a service profile synchronized with each other, thereby providing a consistent additional service in the packet service system and the circuit service system to a terminal that can use both the packet service system and the circuit service system. .

1 is a view for explaining the configuration of a communication system for providing a call state guide service according to an embodiment of the present invention.
2 is a view for explaining a configuration of an additional service controller for providing a call state guidance service according to an embodiment of the present invention.
3 is a view for explaining the configuration of a terminal for providing a call state guidance service according to an embodiment of the present invention.
4 and 5 are flowcharts illustrating a method for providing a call state guidance service according to an embodiment of the present invention.
6 is a flowchart illustrating a method for providing a call state guidance service of an additional service controller according to an embodiment of the present invention.
7 is a flowchart illustrating a method for providing a call state guidance service of a terminal according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the following description and the accompanying drawings, detailed descriptions of well-known functions or configurations that may obscure the subject matter of the present invention will be omitted. In addition, it should be noted that like elements are denoted by the same reference numerals as much as possible throughout the drawings.

The terms or words used in the specification and claims described below should not be construed as being limited to the ordinary or dictionary meanings, and the inventors are appropriate to the concept of terms in order to explain their invention in the best way. It should be interpreted as meanings and concepts in accordance with the technical spirit of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the present specification and the configuration shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all of the technical ideas of the present invention, and various alternatives may be substituted at the time of the present application. It should be understood that there may be equivalents and variations.

1 is a view for explaining the configuration of a communication system for providing a call state guide service according to an embodiment of the present invention.

Referring to FIG. 1, a communication system according to an exemplary embodiment of the present invention includes a packet switched system 100, a circuit switched network 200, an access service 300, and a terminal. 400).

The packet service system 100 is a core network providing a communication service to the terminal 400 according to a packet switched method based on an IP (Internet Protocol), and the circuit service system 200 is a circuit. A core network providing a communication service to the terminal 400 according to a circuit switched method. The access service system 300 provides a wireless section service to the terminal 400, and the terminal 400 may access the packet service system 100 or the circuit service system 200 through the access service system 300.

In the exemplary embodiment of the present invention, the terminal 400 requesting a call connection among the terminals 400 is called the calling terminal 401, and the terminal 400 which is the target of the call connection is called the called terminal 402. In addition, in the embodiment of the present invention, when the calling terminal 401 requests a call, it is assumed that the called terminal 402 is busy, and any terminal 400 talking to the called terminal 402 is called a third party. This is called the terminal 403.

Each terminal 400 has identification information, and the identification information is information for distinguishing the terminal 400 from other terminals 400. For example, the identification information may be a telephone number of the terminal 400. When using a message according to the Session Initiation Protocol (SIP), that is, a SIP message, for connection, a URI (Uniform Resource Identifier) of the calling terminal 401 or the called terminal 402 described in the SIP message is used as identification information. Can be.

The packet service system 100 may provide a voice call service to the terminal 400. When the calling terminal 401 requests a call connection with the called terminal 402, the packet service system 100 may allocate a resource for a call between the calling terminal 401 and the called terminal 402. According to the SIP, the allocation of resources is made through the session connection between the calling terminal 401 and the called terminal 402. When a session is connected, the calling terminal 401 and the called terminal 402 may exchange voice packets through the connected session, which may be performed according to a mobile voice over IP (mVoIP) scheme. In addition, the packet service system 100 may provide an additional service for a voice call service, which is a basic service. In particular, the packet service system 100 may provide a call state guidance service as an additional service. When the calling terminal 401 requests a call connection to the called terminal 402, the call state guide service provides a session with the called terminal 402, although the called terminal 402 is busy when the called terminal 402 is busy. Since the connection can be made is an additional service for providing a call announcement to the calling terminal 401 to guide the waiting for the session connection.

Meanwhile, the terminal 400 may access the packet service system 100 through an access network 300. That is, the access service system 300 connects the terminal 400 and the packet service system 100 so that the terminal 400 accesses the packet service system 100 through the terminal 400. The packet service system 100 may support all kinds of connection service systems 300. For example, the access service system 300 may be a fixed access method such as a digital subscriber line (DSL), a cable modem, an Ethernet, or the like. In this case, the access service system 300 is connected to the packet service system 100 by the terminal 400 through a modem, a router, a gateway, etc., which are wired to the terminal 400. To provide a wired connection service. In addition, the access service system 300 may be a mobile access method such as W-CDMA, CDMA2000, GSM, GPRS, and the like. In this manner, the access service system 300 includes a base station 310, a base station controller 320, a gateway 330, and the like. Accordingly, the access service system 300 may provide a wireless section service between the base station 310 and the terminal 400 to allow the terminal 400 to access the packet service system 100. The access service system 300 may be a wireless access system such as a wireless local area network (WLAN), a wireless fidelity (WiFi), a worldwide interoperability for microwave access (WiMAX), and the like. In this case, the access service system 300 may be configured to include an access point and an access router. Accordingly, the access service system 300 may provide the wireless interval service through the access point to the terminal 400 so that the terminal 400 may access the packet service system 100. As described above, the terminal 400 capable of using the access service system 300 may access the packet service system 100 through the corresponding access service system 300. Meanwhile, in the embodiment of the present invention, as shown in FIG. 1, it is assumed that the access service system 300 includes a mobile access base station 310, a base station controller 320, and a gateway 330. However, the access service system 300 is not limited thereto, and the access service system 300 of the fixed access method or the wireless access method may be used.

Hereinafter, the packet service system 100 will be described on the assumption that IMS (IP Multimedia Subsystems). The packet service system 100 may be configured of a plurality of entities, and each entity may be implemented as a single device, or may be implemented as a different device for each entity.

Entities of the packet service system 100 according to an embodiment of the present invention may include additional service controllers (TAS, Telephony Application Server 110), session controllers (CSCF, Call Session Control Function, 120), and home subscriber devices (HSS). Server, 130) and a media device (MRF, Multimedia Resource Function, 160). In particular, the media device 160 includes a multimedia resource controller (MRFC) 140 and a multimedia resource processor (MRFP) 150. Other entities in the packet service system 100 are omitted from the description to clarify the subject matter of the invention.

The additional service controller 110 is an entity for providing an additional service. In order to provide the additional service, the additional service controller 110 may check the type of the additional service subscribed to by the calling terminal 401 or the called terminal 402. The additional service controller 110 may provide an additional service to the calling terminal 401 or the called terminal 402 according to the type of additional service subscribed to by the calling terminal 401 or the called terminal 402.

In particular, when the calling terminal 401 or the called terminal 402 subscribes to the call status guide service as an additional service, the additional service controller 110 provides the calling device 401 with an announcement broadcast to the calling terminal 401. You can do that. The additional service controller 110 may transmit / receive a message necessary to connect a session between the calling terminal 401 and the media device 160 in order to provide the announcement broadcast to the calling terminal 401. Accordingly, when the session is connected, the additional service controller 110 may deliver a message to the media device 160 requesting the media device 160 to provide the announcement broadcast to the calling terminal 401.

Meanwhile, the additional service controller 110 may check the type of additional service subscribed to by the terminal 400. In particular, the additional service controller 110 checks the service profile in order to confirm whether to subscribe to the call state guide service. The additional service controller 110 checks the service profile of the home subscriber device 130 to check the service profile, or receives and stores the service profile of the home subscriber device 130 or the home location register 210, and then stores the stored service profile. You can check the profile by querying the profile. The service profile contains a list of services subscribed to by the user, where each item represents a service. Here, the service includes a basic service and an additional service. For example, the additional service controller 110 may provide a call state guidance service when an item corresponding to the call state guidance service is activated in the service profile. In addition, the additional service controller 110 may not provide a call state guide service when an item corresponding to the call state guide service is deactivated in the service profile.

The session controller 120 establishes a session between each entity of the packet service system 100 and the terminal 400, and receives and processes a message transmitted from the terminal 400. The session controller 120 may deliver a message to each entity in the packet service system 100 to provide a service as requested by the terminal 400 so that the session may be completed. The session controller 120 may include an Interrogating (CS) -CSCF, a Service (CS) -CSCF, and a P (Proxy) -CSCF.

The session controller 120 basically supports session connection, maintenance, and release for a voice call according to a packet switching scheme between the calling terminal 401 and the called terminal 402. To this end, the originating terminal 401, the called terminal 402, the additional service controller 110, the media device 160 may relay messages exchanged with each other. The session controller 120 confirms the message through the relay of the message, and performs the necessary process according to the confirmed message. In particular, according to an embodiment of the present invention, the message may use a message according to SIP, that is, a SIP message. The SIP message used in the embodiment of the present invention will be described below.

The INVITE message is a method for requesting a session connection between a device and a device. Here, the apparatus includes respective entities of the terminal 400 and the packet service system 100. For session connection, the INVITE message specifies the target of the session connection. Accordingly, the INVITE message may be used to establish a session connection request message for requesting a session connection for a voice call between the calling terminal 401 and the called terminal 402 and for announcement broadcast to the calling terminal 401 of the media device 160. It can be used as a requesting broadcast session connection request message.

According to the SIP, after a session is connected, an UPDATE message or a re-INVITE message may be used to change the session state or change the session parameter. In the embodiment of the present invention, it is assumed that the called terminal 402 and the third terminal 403 are already connected to the session. At this time, in order for the called terminal 402 to accept the session connection request from the calling terminal 401, the called terminal 402 must hold a call with the third terminal 403. Therefore, the destination terminal 402 transmits a session change request message to the third terminal 403 requesting a session change for call holding. In this case, the session change request message may use a re-INVITE message.

The ACK message is a method used as a response indicating that the last device receiving the specific SIP message finally confirmed the specific SIP message. Accordingly, the ACK message may use the acknowledgment of the broadcast session connection acceptance message as the broadcast session connection acceptance confirmation message. In addition, the ACK message may be used as a session change acceptance confirmation message for notifying that the response is confirmed in response to the session change acceptance (200 OK) message. In addition, the ACK message may be used as a session connection acceptance confirmation message indicating that the response is confirmed in response to the session connection acceptance (200 OK) message.

The 1xx series message (where xx is a natural number) of the SIP messages is a kind of response message and is used to indicate that a specific request message has been received and message processing is continued. When the calling terminal 401 transmits an INVITE message for requesting a session connection to the called terminal 402, the called terminal 402 may respond with a 180 ringing message. The 180 ringing message indicates that a session connection request (INVITE) message has been received and is used as a session connection request acknowledgment message indicating that a ring tone is being output from a terminal receiving the session connection request (INVITE) message. Can be. Meanwhile, in order to provide the announcement broadcast to the calling terminal 401, the additional service controller 110 stops transmitting the session connection request (INVITE) message to the called terminal 402, and the additional service controller 110 sends a 183 SessionProgress. The message may be sent to the calling terminal 401. In particular, the 183 SessionProgress message is a message indicating that the session is still in progress. The additional service controller 110 transmits a 183 SessionProgress message, thereby performing a session connection between the media device 160 and the originating terminal 401 instead of a session connection for a call between the originating terminal 401 and the called terminal 402. The procedure can continue. Accordingly, the 183 SessionProgress message may be used as a session progress message to indicate that the session is still in progress.

Among the SIP messages, 2xx series messages (where xx is a natural number) are used as a response message to inform success in response to a specific SIP message. In particular, a 200 OK message is used to indicate acceptance, acknowledgment, acknowledgment, and the like for a particular message. Accordingly, the 200 OK message may be used as a broadcast session connection acceptance message for accepting a session connection between the media device 160 and the calling terminal 401 in response to the broadcast session connection request (INVITE) message. In addition, the 200 OK message may be used as a broadcast session disconnection acceptance message for notifying the release of the session connected between the calling terminal 401 and the media device 160 in response to the broadcast session disconnection (BYE) message. have. In addition, the 200 OK message may be used as a session change accept message for notifying that the 200 OK message is accepted in response to the re-INVITE message. The 200 OK message may be used as a session connection acceptance message for notifying that the session connection is accepted in response to the session connection request (INVITE) message. In addition, the 200 OK message may be used as a broadcast acceptance message for accepting the guide broadcast in response to the broadcast request (INFO) message requesting the guide broadcast to the media device 160.

The INFO message is a method for transmitting additional information in an existing session. Therefore, after the session for broadcasting is connected, it can be used as a broadcast request message for requesting to perform a guide broadcast.

The BYE message is a method used to terminate various sessions. Accordingly, the BYE message may be used as a broadcast session disconnection message requesting the release of a session connected for broadcast between the calling terminal 401 and the media device 160. The home subscriber device 130 stores user information and supports entities performing session control. The home subscriber device 130 stores user subscription information related to session control, that is, location information of the user, security information for authentication and permission of the user, and a service profile that is a list of services subscribed to by the user.

The media device 160 includes a multimedia resource controller 140 and a multimedia resource processor 150. When the session between the media device 160 and the calling terminal 401 is connected, the multimedia resource controller 140 may control the multimedia resource processor 150 to provide the announcement broadcast to the calling terminal 401. Accordingly, the multimedia resource processor 150 may provide a guide broadcast through a session connected with the calling terminal 401 under the control of the multimedia resource controller 140. In addition, the multimedia resource controller 140 and the multimedia resource processor 150 may be implemented as independent equipment, or as a single equipment.

Next, the configuration of the circuit service system 200 according to an embodiment of the present invention will be described. The circuit service system 200 includes a home location register (HLR) 210 and an intranet gateway (IGW) 220.

The home location register 210 basically manages a user in the circuit service system 200. That is, the home location register 210 may perform functions such as user authentication and location registration. In particular, the home location register 210 may manage a service subscribed to by the user. This service includes basic service and additional service. Here, the basic service may exemplify a voice call, and the additional service may exemplify call forwarding, voice message, call status guide service, and the like. In order to manage a service subscribed to by the user, the home location register 210 may store a service profile that is a list of services subscribed to by the user. Each item in this list represents a service. If the item is activated, the service can be provided. If the item is deactivated, the service cannot be provided.

The intranet gateway 220 is a gateway between the value added controller 110 and the home location register 210. That is, the intranet gateway 220 connects the additional service controller 110 and the home location register 210. The additional service controller 110 is interworked with the home location register 210 through the intranet gateway 220, and the additional service controller 110 and the home location register 210 communicate with each other according to a mobile application part (MAP). Can be. The additional service controller 110 may receive and store a required service profile. If the service profile received and stored from the home location register 210 is changed, the additional service controller 110 may transmit information about the changed service profile to the home location register 210. Also, when the service profile stored in the home location register 210 is changed, the home location register 210 may transmit information about the changed service profile to the additional service controller 110. Accordingly, the service profiles stored in the additional service controller 110 and the home location register 210 may be kept the same.

2 is a diagram illustrating a configuration of an additional service controller for providing a call state guide service according to an embodiment of the present invention.

Referring to FIG. 2, the additional service controller 110 includes a communication module 10, a storage module 20, and a control module 30.

The communication module 10 is for transmitting and receiving data with other entities in the packet service system 100 and the components of the circuit service system 200. To this end, the communication module 10 may have a function of processing data with a suitable protocol according to a target to be communicated. The additional service controller 110 may basically communicate with other entities in the packet service system 100 according to the SIP. Accordingly, when communicating with other entities of the packet service system 100, the communication module 10 may process data transmitted and received according to SIP. That is, the communication module 10 transmits and receives a SIP message. In addition, the additional service controller 110 may communicate with the home subscriber device 130 according to the DIAMETER protocol for data security. Accordingly, when communicating with the home subscriber device 130 of the packet service system 100, the communication module 10 may process data transmitted and received according to the DIAMETER protocol. The additional service controller 110 may communicate with the intranet gateway 220 according to the MAP. Accordingly, when communicating with the intranet gateway 220, the communication module 10 may process data transmitted and received according to the MAP. have.

The storage module 20 may store the service profile received from the home location register 210 and the service profile received from the home subscriber device 130. In addition, the storage module 20 may temporarily or permanently store various messages transmitted and received.

The control module 30 is for providing a call state guidance service in the additional service controller 110. To this end, the control module 30 may generate various messages required for the call state guide service. In addition, the control module 30 may extract necessary information from the message received through the communication module 10, or include the necessary information in the message and transmit it through the communication module 10.

When the originating terminal 401 receives the session connection request message for the call with the called terminal 402 through the communication module 10, the control module 30 transmits the session connection request message to the originating terminal 401 or The additional service subscribed to by the called terminal 402, which is a reception target of the session connection request message, may be checked. At this time, the control module 30 receives the service profile from the home location register 210 or the home subscriber device 130 through the communication module 10, stores it, and inquires the stored service profile, the calling terminal ( 401 or the called terminal 402 can check the additional service subscribed. In addition, the control module 30 may query the service profile stored in the home subscriber device 130 through the communication module 10 to check the additional service subscribed to by the calling terminal 401 or the called terminal 402. In particular, the control module 30 may check whether the called terminal 402 subscribes to the call state guide service.

The called terminal 402 may include the call state information indicating that he is currently in a call in the session ringing request confirmation 180 ringing message and transmit the message. The session connection request confirmation (180 ringing) message is a message indicating that the called terminal 402 confirms the session connection request according to the session connection request of the calling terminal 401. The control module 30 is the called terminal 402 is busy on the call state information of the session connection request confirmation (180 Ringing) message, the called terminal 402 is holding a call with the third terminal 403 is busy It can be seen that the session connection can be established by accepting the session connection request of the originating terminal 401. The call state information may use an Alert-Info header of the 180 ringing message.

When the control module 30 confirms that the called terminal 402 is busy, a message for requesting connection of a session between the media device 160 and the calling terminal 401 to provide an announcement to the calling terminal 401. Is transmitted to the media device 160, and a message indicating that the procedure for connecting the session to the calling terminal 401 is continued for the continuation of the session connection procedure, may be transmitted through the communication module 10. In particular, when a session for broadcasting between the calling terminal 401 and the media device 160 is connected, the control module 30 sends a broadcast request message through the communication module 10 requesting to provide a guide broadcast through the connected session. May transmit to the media device 160.

3 is a view for explaining the configuration of a terminal for providing a call state guide service according to an embodiment of the present invention.

Referring to FIG. 3, the terminal 400 according to the embodiment of the present invention includes a communication unit 410, an input unit 440, an output unit 450, a storage unit 460, and a control unit 470.

The communication unit 410 is a means for connecting to the connection service system 300 to transmit and receive data. Here, the data includes a SIP message. For example, the SIP message may include an INVITE message, a re-INVITE message, a 180 ringing message, a 200 OK message, an ACK, an INFO message, and the like.

The communication unit 410 may include at least one of the wireless communication unit 420 and the wired communication unit 430. The wireless communication unit 420 may include a wireless network communication unit 421, a wireless local area network (WLAN), a wireless LAN (Wireless Fidelity or WiMAX), a worldwide interoperability for microwave access (WLAN) communication unit 422, and a wireless fan (WPAN). Network) may include at least one of the communication unit 423.

The wireless communication unit 420 is configured to transmit and receive data according to a wireless communication method, and when the terminal 400 uses wireless communication, the wireless network communication unit 421, the wireless LAN communication unit 422, and the wireless fan communication unit 423. Any one of the data may be transmitted or received.

The wireless network communication unit 421 is a means for transmitting and receiving data by accessing the access service system 300 through the base station 310. When the wireless network communication unit 421 receives data from the control unit 470, the wireless network communication unit 421 may access the access service system 300 through the base station 310 and transmit data. In addition, the wireless network communication unit 421 may access the access service system 300 through the base station 310 to receive data and provide the received data to the control unit 470.

The wireless LAN communication unit 422 is for performing communication according to a wireless LAN (WLAN), Wi-Fi (WiFi), or WiMAX (WiMAX). When the WLAN communication unit 422 receives data from the controller 470, the WLAN communication unit 422 may access the access service system 300 through an access point and transmit data. In addition, the WLAN communication unit 422 may access the access service system 300 through an access point, receive data, and provide the received data to the controller 470.

The wireless fan communication unit 423 is for transmitting and receiving data according to a wireless fan (WPAN) method, and is for transmitting and receiving data through shorter distance wireless communication than the wireless network communication unit 421 and the wireless LAN communication unit 422. . The wireless fan communicator 423 may directly transmit / receive data with another terminal 400. In addition, when the wireless fan communication unit 423 can connect to the gateway directly or through a multi-hop, the wireless fan communication unit 423 may transmit and receive data by accessing the access service system 300 through the gateway. The wireless fan communication unit 423 may exemplify communication according to Bluetooth, infrared communication (IrDA), ZigBee, and the like.

The wired communication unit 430 is for transmitting and receiving data by wire. In particular, the wired communication unit 430 may be connected to the access service system 300 through a wire to transmit and receive data. In particular, the access service system 300 connected through a wire may be a network or a private network provided by an Internet Service Provider (ISP). Here, the private network may exemplify a specific group of intra-networks and the like.

The input unit 440 is a means for receiving at least one of a user's command, selection, data, and information. The input unit 440 may include a plurality of input keys and function keys for receiving numeric or text information and setting various functions. The input unit 440 detects a user's key input and transmits an input signal according to the detected key input to the controller 470. The input unit 440 may illustrate an input device such as a keyboard, a keypad, a mouse, a joystick, and the like.

The output unit 450 is a means for outputting a result or information according to the operation of the terminal 400. The output unit 450 may include a display device 451 for outputting visual information and an audio device 453 for outputting audio information. The display device 451 may be a touch screen. As such, when the display device 451 is formed in the form of a touch screen, the display device 451 may perform some or all of the functions of the input unit 440. Can be done. In addition, when the terminal 400 is the called terminal 402, the calling terminal 401 may receive a session connection request (INVITE) message requesting a call connection to the called terminal 402. In this case, the audio device 453 may output a ring tone. According to an embodiment of the present invention, it is assumed that the called terminal 402 receives a session connection request (INVITE) message while in a call with the third terminal 403, so that the audio device 453 interferes with the voice call. It is desirable to output ring tones at a level that is not enough. In addition, when the terminal 400 is the calling terminal 401, the announcement broadcast may be received through a session connected with the media device 160, and the audio device 453 may output the received announcement broadcast.

The storage unit 460 is a device for storing data, and includes a main memory device and an auxiliary memory device. The storage unit 460 may store an operating system (OS), an application, and the like. In particular, the storage unit 460 may store the received SIP message. According to the SIP, the handshake process of exchanging request and response messages between devices is repeated, whereby the stored SIP message can be used to extract data for responding to the request. Various data stored in the storage unit 460 may be deleted, changed, or added according to a user's manipulation.

The controller 470 may be a process device that actually runs an operating system. For example, the controller 470 may be a central processing unit (CPU). When the power of the terminal 400 is turned on, the controller 470 moves the operating system from the auxiliary storage device of the storage unit 460 to the main memory device, and then boots the operating system.

The controller 470 may generate various messages according to the SIP, and transmit the generated messages through the communication unit 410. In addition, when the controller 470 receives the message according to the SIP, the controller 470 performs a necessary operation according to the type of the message.

In the case of the originating terminal 401, the control unit 470 may generate a session connection request (INVITE) message and transmit it through the communication unit 410 to make a call connection with the counterpart terminal 400.

In the case of the called terminal 402, the control unit 470 controls to output a ring tone through the output unit 450 when receiving the session connection request (INVITE) message through the communication unit 410. When the controller 470 receives the session connection request (INVITE) message, the controller 470 generates a session connection request confirmation (180 ringing) message in response thereto, and transmits the message through the communication unit 410. At this time, the controller 470 includes the call state information in the session connection request confirmation (180 ringing) message when the call is in communication with the third terminal 403, and confirms the session connection request including the call state information (180). ringing) message. Call state information may use an Alert-Info header. That is, the call state information is described as "Alert-Info: <urn: alert: service: call-waiting>" in the 180 linking message. The call state information indicates that the call is in progress and can accept the session connection request of the calling terminal 401. In addition, when a call connection request (INVITE) message is received from the originating terminal 401 during a call with the third terminal 403, the controller 470 transmits a user's call to the originating terminal 401 through the input unit 440. You can detect the hook-off that you accept for a call connection request. Accordingly, the controller 470 performs a procedure of suspending the call with the third terminal 403 in order to accept the call connection with the calling terminal 401. That is, the controller 470 may generate a session change request (re-INVITE) message and transmit the same through the communication unit 410. When the control unit 470 receives the session change acceptance (200 OK) message that accepts the message from the third terminal 403 through the communication unit 410, the call with the third terminal 403 is suspended. If the call is suspended, the controller 470 performs a procedure for connecting a session with the calling terminal 401. That is, the controller 470 generates a session connection acceptance (200 OK) message in response to the session connection request. Then, the controller 470 may transmit a session connection accept message (200 OK) through the communication unit 410. In addition, the controller 470 may receive a session connection acceptance acknowledgment (ACK) message from the originating terminal 401 through the communication unit 410 confirming the session connection acceptance. Accordingly, a session with the calling terminal 401 may be connected to perform a call.

4 and 5 are flowcharts illustrating a call state guidance service providing method according to an embodiment of the present invention.

4 and 5, it is assumed that the third terminal 403 and the called terminal 402 are in a busy state performing a call through a session connected to each other in step S401.

The originating terminal 401 transmits a session connection request message to the session controller 120 in step S403. The session connection request message is for requesting the calling terminal 401 to connect a session between the calling terminal 401 and the called terminal 402 for a call with the called terminal 402. According to the SIP, the session connection request message may use an INVITE message. The session connection request (INVITE) message is transmitted to the called terminal 402 via the session controller 120, the additional service controller 110, and the session controller 120 in steps S405 to S409.

On the other hand, when the additional service controller 110 receives a session connection request (INVITE) message from the session controller 120 in step S405, the additional service controller 110 is the originating terminal 401 from the session connection request (INVITE) message And extract the identification information of the called terminal 402 and check the additional service subscribed to by the calling terminal 401 and the called terminal 402. In this case, as described above, the confirmation of the additional service may be performed by querying the service profile. In particular, according to an embodiment of the present invention, the additional service controller 110 may check whether the called terminal 402 is subscribed to the call status guide service. Here, when the called terminal 402 is subscribed to the call state guidance service, the additional service controller 110 performs an operation required for the call state guidance service, otherwise, the additional service controller 110 according to the general procedure You can relay the message.

The receiving terminal 402 that receives the session connection request (INVITE) message in step S409 may output a ring tone. This is to inform the user of the called terminal 402 that there is a session connection request, that is, a call request. In addition, the called terminal 402 transmits a session connection request confirmation message to the session controller 120 in step S411. The session connection request confirmation message has received a session connection request (INVITE) message, and thus, to inform that the ring tone is output from the called terminal 402. The session connection request confirmation message preferably uses a 180 ringing message according to SIP. In particular, the called terminal 402 transmits the call state information in the session connection request confirmation message. The call state information is for notifying that the called terminal 402 is busy. In addition, the call state information is for notifying that the called terminal 402 may hold a call with the third terminal 403 in a call and accept the session connection request of the calling terminal 401. Call state information may use an Alert-Info header. For example, the call state information is described in the session connection request confirmation message as "Alert-Info: <urn: alert: service: call-waiting>". Subsequently, the session controller 120 transmits a session connection request confirmation 180 ringing message including call state information (Alert-Info) to the additional service controller 110 in step S413.

The additional service controller 110 receiving the session connection request confirmation (180 ringing) message determines the call state of the called terminal 402 in step S415, and the called terminal 402 is determined through call state information (Alert-Info). While the call is in progress, the receiving terminal 402 may hold the call with the third terminal 403 and accept the session connection request of the calling terminal 401 to establish a session connection with the calling terminal 401. . Accordingly, the additional service controller 110 determines to provide a call state guidance service to the calling terminal 401 in step S417. Accordingly, the additional service controller 110 transmits a broadcast session connection request message to the session controller 120 in step S419. The broadcast session connection request message is a message for requesting the media device 160 to connect a session with the calling terminal 401 to provide an announcement to the calling terminal 401. The broadcast session connection request message may use an INVITE message according to the SIP. In operation S421, the session controller 120 transmits a broadcast session connection request (INVITE) message to the media device 160.

When the media device 160 receives the INVITE message, the media device 160 transmits a broadcast session connection acceptance message to the session controller 120 in step S423. Here, the broadcast session connection acceptance message is a message meaning that the media device 160 accepts the session connection with the originating terminal 401 in response to the broadcast session connection request (INVITE) message. The broadcast session connection accept message may use a 200 OK message, according to SIP. Subsequently, the session controller 120 transmits a broadcast session connection acceptance (200 OK) message to the additional service controller 110 in step S425.

After receiving the 200 OK message, the additional service controller 110 transmits a session progress message to the session controller 120 in step S427. The session progress message is used to inform the calling terminal 401 that a procedure for establishing a session is still in progress. In addition, the session progress message is to inform the calling terminal 401 that a session connection for providing an announcement broadcast is in progress. The session progress message may use the 183 SessionProgress message, according to the SIP. That is, the additional service controller 110 transmits a session progress message 183 SessionProgress in response to the received session connection request message (step S405). The session controller 120 receiving the session progress message 183 delivers the session progress message 183 SessionProgress to the originating terminal 401 in step S429. The originating terminal 401 receiving the session progress message 183 may confirm that the session establishment procedure is still in progress. As such, upon receiving the session progress message 183, the originating terminal 401 may not proceed with another procedure that proceeds when the session connection fails, such as retransmission of an INVITE message.

On the other hand, the additional service controller 110 transmits a broadcast session connection acceptance confirmation message to the session controller 120 in step S431. The broadcast session connection acceptance confirmation message is a message for notifying that the terminal connection confirmation for the announcement finally. In addition, the broadcast session connection acceptance confirmation message is a response message corresponding to the broadcast session connection acceptance (200 OK) message. The broadcast session connection acceptance confirmation message preferably uses an ACK message according to the SIP. Subsequently, the session controller 120 transmits a broadcast session connection acceptance acknowledgment (ACK) message to the media device 160 in step S433. When the media device 160 receives the ACK message, a session is connected between the calling terminal 401 and the media device 160.

After transmitting the ACK message, the additional service controller 110 transmits a broadcast request message to the session controller 120 in step S435. The broadcast request message is a message for requesting the media device 160 to provide an announcement broadcast to the calling terminal 401. Such a broadcast request message may use an INFO message according to SIP. The INFO message is used when a control message is to be transmitted through an already connected session. The session controller 120 transmits this broadcast request (INFO) message to the media device 160 in step S437.

The media device 160 receiving the broadcast request (INFO) message transmits a broadcast accept message to the session controller 120 in the sense of acceptance of the INFO message in step S439. That is, the broadcast acceptance message is for notifying that the announcement terminal will be provided to the calling terminal 401. The broadcast accept message may use a 200 OK message according to the SIP. Subsequently, the session controller 120 transmits a broadcast accept (200 OK) message to the additional service controller 110 in step S441.

After transmitting the broadcast acceptance 200 OK message, the media device 160 provides the announcement broadcast to the calling terminal 401 through the connected session in step S443. In this case, the announcement broadcast guides the receiver terminal 402 to wait for a while while waiting for a session connection with the receiver terminal. This announcement has the following meaning. That is, when the called terminal 402 receives a call request from the calling terminal 401 while the called terminal 402 is in a call with the third terminal 403, the called terminal 402 is connected to the third terminal 403. Withholding a call, and having a function to make a call connection with the calling terminal 401, it is to inform that the subscription to the additional service that supports it. For this reason, the announcement broadcast guides the calling terminal 401 user to wait for a session connection. Through the reception of the announcement, the user of the calling terminal 401 may determine whether to wait for a call connection according to the content of the announcement. As described above, by informing about the call state of the called terminal 402 and providing information for determining whether to continue the call connection request to the user of the calling terminal 401 through an announcement broadcast indicating whether the call is possible, User convenience can be attained.

When the media device 160 completes the announcement by playing all the announcements prepared in step S445, the media device 160 transmits a broadcast session disconnection message to the session controller 120 in step S447. The broadcast session connection release message is a message for requesting the release of the connected session between the calling terminal 401 and the media device 160, and it is preferable to use a BYE message according to SIP. Subsequently, the session controller 120 transmits a broadcast session disconnection (BYE) message to the additional service controller 110 in step S449. The additional service controller 110 receiving the broadcast session disconnection (BYE) message may know that the announcement broadcast is completed. Accordingly, the additional service controller 110 transmits a broadcast session connection release acceptance message to the session controller 120 in step S451. The broadcast session disconnection accept message is a message for notifying release of a disconnected session between the calling terminal 401 and the media device 160 in response to a broadcast session disconnection (BYE) message. The broadcast session disconnection accept message may use a 200 OK message according to SIP. Subsequently, the session controller 120 transmits a broadcast session disconnection accept (200 OK) message to the media device 160 in step S453. As a result, the session connection is released between the calling terminal 401 and the media device 160.

On the other hand, when the user of the called terminal 402 accepts the call connection request from the calling terminal 401, the call holding procedure for the third terminal 403 must proceed. Therefore, when the called terminal 402 detects a hook-off of accepting a call connection request with the calling terminal 401 of the user in step S455, it determines to proceed with the call holding procedure in step S457. This is as follows.

The called terminal 402 transmits a session change request message in step S459. The session change request message is for requesting the third terminal 403 to change the session to hold a call with the third terminal 403 to which the current session is connected and to connect the session with the calling terminal 401. This session change request message may use a re-INVITE message. The session change request (re-INVITE) message transmitted by the called terminal 402 is transmitted through the session controller 120, the additional service controller 110, and the session controller 120 in steps S461 to S465. Is delivered).

The third terminal 403 receiving the session change request (re-INVITE) message transmits a session change accept message in step S467. The session change accept message is for responding to a session change request (re-INVITE) message to indicate that it accepts. The session change accept message may use a 200 OK message, according to the SIP. The transmitted session change acceptance (200 OK) message is transmitted to the called terminal 402 via the session controller 120, the additional service controller 110, and the session controller 120 in steps S469 to S473.

The receiving terminal 402 receiving the 200 OK message transmits a session change acceptance confirmation message in step S475. The session change acceptance confirmation message is for responding to the session change acceptance (200 OK) message to inform that it has been confirmed. The session change accept confirmation message may use an ACK message, according to the SIP. The transmitted session change acceptance acknowledgment (ACK) message is transmitted to the third terminal 403 via the session controller 120, the additional service controller 110, and the session controller 120 in steps S477 to S481. As a result, the call to the third terminal 403 is suspended.

When the above-described session change procedure is completed, the called terminal 402 determines the progress of the session connection procedure with the originating terminal 401 in step S483, and transmits the session connection acceptance message in step S485. The session connection acceptance message is a response to the session connection request (INVITE) message previously received (step S409) and is for notifying that the session connection is accepted. The session connection accept message may use a 200 OK message, according to SIP. The transmitted session connection accept message (200 OK) is transmitted to the calling terminal 401 through the session controller 120, the additional service controller 110, and the session controller 120 in steps S487 to S491.

The originating terminal 401 receiving the 200 OK message transmits a session connection acceptance confirmation message in step S493. The session connection acceptance confirmation message is for responding to the session connection acceptance (200 OK) message to inform that it has been confirmed. The session connection acceptance confirmation message may use an ACK message, according to the SIP. The transmitted session connection acknowledgment (ACK) message is transmitted to the called terminal 402 via the session controller 120, the additional service controller 110, and the session controller 120 in steps S495 to S499. As a result, a session is connected between the calling terminal 401 and the called terminal 402. Accordingly, the calling terminal 401 and the called terminal 402 may make a call through the connected session in step S501.

6 is a flowchart illustrating a method for providing a call state guidance service of an additional service controller according to an embodiment of the present invention.

Referring to FIG. 6, the additional service controller 110 receives an INVITE message in step S601. Then, the additional service controller 110 checks whether the called terminal 402 is subscribed to the call state guidance service in step S603. In this case, the additional service controller 110 may query the service profile to check whether the called terminal 402 is subscribed to the call state guide service. At this time, when the called terminal 402 is subscribed to the call status guide service, when the called terminal 402 is in a call with the third terminal 403 when receiving the session connection request message, the session connection request message is It may be expected that call state information may be included in the responding session connection request confirmation (180 ringing) message. Accordingly, the additional service controller 110 proceeds to step S605 to proceed with the procedure for providing the call state information service. On the other hand, when the called terminal 402 is not subscribed to the call state guidance service, the additional service controller 110 proceeds to step S617, and simply relays a session connection request (INVITE) message according to a general procedure.

After confirming the subscription of the call state guide service, the additional service controller 110 transmits a session connection request (INVITE) message to the called terminal 402 in step S605. Subsequently, the additional service controller 110 may receive a session connection request confirmation (180 ringing) message in response to the session connection request (INVITE) message in step S607.

Accordingly, the additional service controller 110 determines the call state of the called terminal 402 through the session connection request confirmation (180 ringing) message in step S609. That is, if the call connection information is included in the session ringing request confirmation (180 ringing) message, the called terminal 402 is in a call with the third terminal 403, and withholds the call with the third terminal 403, It can be seen that the session connection of the originating terminal 401 can be accepted. Here, the call state information may use an Alert-Info header in the 180 ringing message, which is described as “Alert-Info: <urn: alert: service: call-waiting>”. On the other hand, if the call connection information is not included in the session connection request confirmation (180 ringing) message, it is determined that the call is not busy.

As a result of the determination in step S609, when the called terminal 402 is in a call, the additional service controller 110 proceeds to step S611, and when not in a call, proceeds to step S615, and simply confirms a session connection request according to a general procedure. (180 ringing) delivers the message.

When the called terminal 402 is busy, in step S611, the additional service controller 110 causes a session for broadcasting to be connected between the calling terminal 401 and the media device 160. To this end, the additional service controller 110 transmits a broadcast session connection request (INVITE) message to the media device 160 to request a session connection for broadcasting, and accepts the broadcast session connection from the media device 160 (200 OK). Upon receiving the message, in response, the session for broadcast is connected by sending a broadcast session connection acceptance acknowledgment (ACK) message.

As described above, when a session for broadcasting is connected between the calling terminal 401 and the media device 160, the additional service controller 110 transmits the announcement to the media device 160 through the connected session in step S613. It provides to the terminal 401. That is, the additional service controller 110 transmits a broadcast request (INFO) message requesting the media device 160 to provide the announcement broadcast to the calling terminal 401. After receiving the broadcast request (INFO) message, the media device 160 transmits a broadcast accept (200 OK) message and provides an announcement broadcast to the calling terminal 401. As such, the additional service controller 110 interoperates with the media device 160 and provides the announcement broadcast to the calling terminal 401. In this case, the announcement broadcast is currently connected to the caller terminal 401 when the called terminal 402 is in a call state or waits for a while, and delivers the contents for guiding the waiting for the session connection. Through the reception of the announcement, the user of the calling terminal 401 may determine whether to wait for a call connection according to the content of the announcement.

7 is a flowchart illustrating a method for providing a call state guidance service of a terminal according to an embodiment of the present invention.

In FIG. 7, the terminal 400 assumes the called terminal 402. Referring to FIG. 7, the terminal 400 receives a session connection request (INVITE) message from the packet service system 100 in step S701. When receiving the session connection request (INVITE) message, even when the terminal 400 is busy, the terminal 400 outputs a ring tone to inform the user that there is a call connection request. This ring tone should be output at a small volume that does not interfere with the call.

When the session connection request (INVITE) message is received, the terminal 400 determines the call state in step S703. If the terminal 400 is in a call with the third terminal 403, the terminal 400 proceeds to step S705, otherwise, the terminal 400 proceeds to step S715 and proceeds with the procedure according to a general procedure. .

When the call is in progress, the terminal 400 transmits a session connection request confirmation (180 ringing) message including the call state information to the packet service system 100 in step S705.

The call state information basically informs that the terminal 400 is in a call. The call state information indicates that the terminal 400 may hold a call with the third terminal 403 currently in a call and accept the session connection request of the originating terminal 401. When the terminal 400 transmits call state information through a session connection request confirmation (180 ringing) message, the packet service system 100 will provide an announcement broadcast to the calling terminal 401. In this case, the announcement broadcast, the terminal 400 is busy, but the session connection with the originating terminal 401 is possible, and delivers the content of waiting to wait for the session connection.

On the other hand, the terminal 400 may detect whether there is an input (hook-off) that the user accepts the session connection request for the call of the calling terminal 401 in step S707. If the terminal 400 detects an input for accepting a call in step S707, the terminal 400 proceeds to step S709. On the other hand, if it does not detect the input to accept the call, the terminal 400 proceeds to step S715 proceeds with the process according to the general procedure.

The terminal 400 suspends the call with the third terminal 403 currently busy to change the session in step S709. To hold this call, the terminal 400 exchanges a message for changing the session with the third terminal 403. That is, the terminal 400 transmits a session change request (re-INVITE) message and receives a session change accept (200 OK) message corresponding thereto. In response to the session change acceptance message, the terminal 400 transmits a session change acceptance acknowledgment (ACK) message so that the call is suspended.

If the call with the third terminal 403 is suspended, the terminal 400 connects the session with the calling terminal 401 in step S711. That is, the terminal 400 transmits a session connection acceptance (200 OK) message for accepting the session connection request with respect to the previously received session connection request (INVITE) message, and session connection in response to the session connection acceptance (200 OK) message. Receive an acknowledgment (ACK) message and connect a session with the originating terminal 401.

After the session is connected, the terminal 400 may perform a call through the session connected to the calling terminal 401 in step S713.

As described above, according to the exemplary embodiment of the present invention, when the calling terminal 401 requests a connection of a session for a call to the called terminal 402 talking to the third terminal 403, the packet service system 100 The call terminal 401 may provide a guide broadcast for guiding the called terminal 402 to wait for a call or to connect a session for a call. The announcement is information to determine whether the user of the originating terminal 401 who is waiting for a call to remain in the state of requesting a session connection or whether to cancel the session connection request and try the next call. Providing such a guide broadcast has an advantage of improving user convenience.

In addition, the packet service system 100 and the circuit service system 200 provide an additional service using a service profile synchronized with each other, whereby the terminal capable of using both the packet service system 100 and the circuit service system 200 ( 400 can provide a consistent additional service.

The method for providing a call state notification service of the additional service controller 110 according to an embodiment of the present invention may be implemented in a program form readable by various computer means and recorded on a computer readable recording medium. Here, the recording medium may include a program command, a data file, a data structure, etc. alone or in combination. Program instructions recorded on the recording medium may be those specially designed and constructed for the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. For example, the recording medium may be magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs, DVDs, or magnetic-optical media such as floptical disks. magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions may include high-level language code that can be executed by a computer using an interpreter as well as machine code such as produced by a compiler. Such a hardware device may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

In the present specification and drawings, preferred embodiments of the present invention have been disclosed, but it is possible to practice other modifications based on the technical spirit of the present invention, even with the exception of the embodiments disclosed herein. It is obvious to those who have. In addition, although specific terms are used in the specification and the drawings, they are only used in a general sense to easily explain the technical contents of the present invention and to help the understanding of the present invention, and are not intended to limit the scope of the present invention.

The present invention relates to a communication system for providing a call state guidance service, a packet service system for the same, an apparatus therefor, and a method therefor. According to the present invention, a calling terminal makes a call to a called terminal with which a third terminal is talking. When requesting a session connection for the packet service system, the called terminal is in a call with the third terminal, it can provide a guide broadcast to guide the waiting for the session connection is possible for the call. Such announcement broadcasts information to determine whether the user of the calling terminal that is waiting for a call to remain in a state of requesting a session connection for a call or whether to cancel the session connection request and attempt a next call. Providing such a guide broadcast has an advantage of improving user convenience. In addition, by using a service profile synchronized with the packet service system and the circuit service system, it is possible to provide a consistent additional service to a terminal that can use both the circuit service system and the packet service system. This is not only commercially available or commercially viable, but also practically and repetitively, so there is industrial applicability.

10: communication module 20: storage module
30: control module
100: packet service system 110: additional service controller
120: session controller 130: home subscriber device
140: media resource controller 150: media resource handler
160: media device
200: circuit service system 210: home location register
220: intranet gateway
300: access service system 310: base station
320: base station controller 330: gateway
400: terminal 401: calling terminal
402: terminating terminal 403: third terminal
410: communication unit 420: wireless communication unit
421: wireless network communication unit 422: wireless LAN communication unit
423: wireless fan communication unit 430: wired communication unit
440: input unit 450: output unit
451: display device 453: audio device
460: storage unit 470: control unit

Claims (15)

An originating terminal transmitting a session connection request message requesting a session connection for a call with a called terminal;
Receiving the session connection request message during a call, the called terminal transmitting a session connection request confirmation message including call state information indicating that the call can accept the session connection request from the calling terminal; And
And a packet service system for providing a call announcement to the calling terminal informing that the called terminal waits for a call or a session connection according to the call state information of the session connection request confirmation message. Communication system for providing status guidance service. A session controller for relaying, by the calling terminal, a session connection request message for requesting a session connection to the called terminal to the called terminal;
A media device for providing announcement to the calling terminal; And
In response to the session connection request message from the called terminal, when the called terminal receives a session connection request confirmation message including call state information indicating that the calling terminal can accept a session connection request from the calling terminal, the call state And a supplementary service controller for requesting the media device to provide the calling terminal with a guide broadcast that guides the called terminal to wait for a call or session connection according to the information. Packet service system to provide. The method of claim 2, wherein the additional service controller
A session for broadcasting between the calling terminal and the media device is connected, and when the session for broadcasting is connected, the media device requests the calling terminal to provide the announcement broadcast through the connected session. Packet service system for providing call status guide service. The method of claim 2, wherein the media device
A multimedia resource processor for providing the announcement through the connected session when the calling terminal and the session for broadcasting are connected; And
And a multimedia resource controller for controlling the multimedia resource processor to provide the announcement broadcast. The method of claim 2, wherein the session connection request confirmation message
A 180 ringing message according to Session Initiation Protocol (SIP), wherein the call state information is described in an Alert-Info header of the 180 ringing message. A session including call state information indicating that the called terminal is in a call or can accept the session connection request of the calling terminal from the called terminal that has received the session connection request message requesting the session connection with the called terminal; A communication module for receiving a connection request confirmation message; And
In response to the call state information, the media device transmits a message through the communication module requesting that the called terminal provide a guide broadcast to the calling terminal to guide the call terminal waiting for a session connection with the called terminal. An additional service controller for providing a call status guide service, comprising: a control module. A communication unit receiving a session connection request message for requesting a session connection from an originating terminal; And
When the session connection request message is received, the communication unit transmits a session connection request confirmation message including call state information indicating that the mobile terminal is in a call with a third terminal or may accept the session connection request of the calling terminal. Control unit for controlling to transmit through the terminal for providing a call status guide service, characterized in that it comprises a. The method of claim 7, wherein the session connection request confirmation message is
A 180 ringing message according to SIP, wherein the call state information is a terminal for providing a call state guide service, characterized in that described in the Alert-Info header of the 180 ringing message. The method of claim 7, wherein the terminal,
Further comprising; an input unit for receiving a user input,
The control unit
When receiving an input for accepting a session connection with the originating terminal through the input unit, a call state guidance service, characterized in that for transmitting the session change request message requesting the suspension of the call on the third terminal through the communication unit. Terminal for providing. 10. The apparatus of claim 9, wherein the control unit
When the call with the third terminal is suspended according to the transmission of the session change request message, a session with the originating terminal is connected by exchanging a message for session connection with the originating terminal through the communication unit. Terminal for providing a call state guidance service. Receiving a session connection request confirmation message including call state information indicating that the called terminal is busy when the calling terminal receives a session connection request message requesting a session connection with the called terminal;
Determining whether the session connection request message includes call state information indicating that the called terminal is busy or accepts the session connection request of the calling terminal;
If the call result includes the call state information, connecting a session for broadcasting between a media device and the calling terminal; And
When the session for the broadcast is connected, requesting, by the media device, the connected terminal to provide an announcement broadcast to the calling terminal to guide the called terminal waiting for a session connection with the called terminal through a connected session; Method for providing a call state guidance service of the additional service controller, comprising the. When receiving a session connection request message for requesting a session connection from an originating terminal, determining whether a call is in progress with a third terminal;
Generating a session connection request acknowledgment message including call state information indicating that the call can accept a session connection request from the calling terminal when the call is busy; And
And transmitting a session connection request confirmation message including the call state information. The method of claim 12, wherein the session connection request confirmation message
180 ringing message according to SIP, the call state information is a method for providing a call state guide service of the terminal, characterized in that described in the Alert-Info header of the 180 ringing message. The method of claim 12, wherein after the transmitting step:
Transmitting a session change request message to suspend a call in a call with the third terminal when a user's input for accepting a session connection with the calling terminal is detected; And
If the call is suspended according to the session change request message, connecting a session with the originating terminal. 15. The method of claim 14, wherein the session change request message is
Method for providing a call status guidance service of the terminal characterized in that the re-INVITE message according to the SIP.

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