KR100644379B1 - Method and apparatus for providing for ring back tone service - Google Patents

Abstract

The present invention relates to a ring back tone service method and apparatus for a group communication service, and more particularly to a group communication service including voice, data, messages, etc. using a push-to-talk (PTT) method. The present invention relates to a ring back tone service method and apparatus. According to a preferred embodiment, the ring back tone service method for the group communication service includes: (a) the PTT server unit corresponding to the originating terminal requests an incoming call to the SIP server unit corresponding to the ring back tone server unit, thereby making the ring back tone with the calling terminal; Establishing a session between the server units; (b) a media distribution server unit connected to the PTT server unit for updating the ring back tone channel among the PTT channel and the ring back tone channel previously reserved, and transmitting a charging start signal for the ring back tone to the PTT server unit; And (c) when the media distribution server unit grants a voice to the RBT distribution server, the RBT server unit transmitting the RBT to the calling terminal.

Group communication, ring back tone, PTT, terminal, PTD

Description

Method and apparatus for providing ring back tone service for group communication service             

1A is a diagram illustrating a connection relationship with an existing communication network for a ring back tone service according to a preferred embodiment of the present invention.

1B is a diagram illustrating a configuration of a group communication network for a ring back tone service according to a preferred embodiment of the present invention.

1C and 1D illustrate a protocol stack in accordance with a preferred embodiment of the present invention.

2A to 2B are flowcharts illustrating a method of accessing a ring back tone server for a ring back tone service according to a preferred embodiment of the present invention.

3A to 3E are flowcharts illustrating a login, logout method, self status update method, group status inquiry method, and contact list member addition method of a group communication network for a ring back tone service according to an exemplary embodiment of the present invention.

4 is a diagram illustrating a configuration of a group list manager for a ring back tone service according to an exemplary embodiment of the present invention.

5 is a diagram illustrating a configuration of a state management server unit for a ring back tone service according to a preferred embodiment of the present invention.

6 is a diagram showing the configuration of a SIP server unit for a ring back tone service according to an embodiment of the present invention.

7 is a diagram illustrating a configuration of a PTT server unit for a ring back tone service according to an embodiment of the present invention.

8 is a diagram illustrating a configuration of a load distributing unit for a ring back tone service according to an exemplary embodiment of the present invention.

9 is a diagram showing the configuration of a media distribution server unit for a ring back tone service according to an embodiment of the present invention.

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

100: user terminal 400: group list management unit

500: state management server unit 600: SIP server unit

700: PTT server unit 800: load distribution unit

900: media distribution server unit 1000: ring back tone server unit

The present invention relates to a ring back tone service method and apparatus for a group communication service, and more particularly to a group communication service including voice, data, messages, etc. using a push-to-talk (PTT) method. To provide a ring back tone service method and apparatus. Here, PTT (Push-To-Talk) refers to an instant communication service that can provide a relatively very fast communication service compared to the standby time of a general mobile phone.

However, according to the prior art, there is a problem in that there is no effective technology capable of incorporating such a PTT service into an existing CDMA network. In addition, the existing code division multiple access (CDMA) communication network is not only practically impossible to make an immediate call with almost no response waiting time like a radio due to the characteristics of the network, and is also used for group communication services including voice, data, and messages. There is a problem that there is no differentiated ring back tone service method and apparatus.

The present invention has been made to solve the above-described problems, and a ring tone service method and apparatus for a group communication service including voice, data, messages, etc. using a push-to-talk (PTT) method The purpose is to provide.

Another object of the present invention is to provide a method and apparatus for ring back tone service for each group communication service by integrating a PTT service to an existing CDMA network, and other objects are more specific in the embodiments described below. Will be.

According to an aspect of the present invention for achieving the above object, a ring back tone service for providing a group communication service including voice, data, messages, etc. using a push-to-talk (PTT) method A method may be provided.

According to a preferred embodiment, the method for a ring back tone service for a group communication service includes: (a) a PTT server unit corresponding to an originating terminal requests an incoming call to a SIP server unit corresponding to the ring back tone server; Establishing a session between the ring back tone server units; (b) a media distribution server unit connected to the PTT server unit for updating a ring back tone channel of a PTT channel and a ring back tone channel previously reserved, and transmitting a charging start signal for the ring back tone to the PTT server unit; And (c) when the media distribution server unit gives a voice to the RBT distribution server, the RBT server unit transmitting a RBT to the calling terminal.

Here, the ring back tone includes a ring back tone corresponding to the calling terminal set by the caller and a ring back tone corresponding to the called terminal set by the called party. In the step (c), the media distribution server transmits a floor grant message (Floor Grant) granting the floor to the call connection tone server, and sends a floor right message (Floor Taken) indicating that the floor is occupied. Sending to the.

In addition, the ring back tone service method includes the step of receiving the request information for the destination terminal to the group list management unit the PTT server connected to the originating terminal that sent the incoming request to the destination terminal; The media distribution server unit receives a reservation request for the PTT channel corresponding to the called terminal and the ring back tone channel corresponding to the ring back tone server from the PTT server unit, and then makes a reservation for the PTT channel and the ring back tone channel. Performing the steps. And the ring back tone service method comprises the step of requesting the PTT server unit to update the ring back tone channel to the media distribution server, ending the ring back tone provision; Requesting, by the PTT server unit, an update for the PTT channel to the media distribution server, and updating the channel in the media distribution server unit; The media distribution server unit notifies the PTT server unit of the start of charging for the PTT service, and grants a voice to the calling terminal, and the calling terminal transmits voice data to the called terminal.

Here, when the called terminal is in the manual mode, the PTT server unit continuously receives a ring signal from the called terminal while the call connection tone is provided, and if the answering terminal responds, recognizes this and terminates the call connection tone. The method may further include requesting a media distribution server.

In addition, the media distribution server unit, the step of transmitting a floor grant message (Floor Grant) granting the right to speak to the calling terminal, and transmitting a floor right message (Floor Taken) indicating that the right to speak is occupied to the called terminal; It may be further included.

According to another aspect of the present invention for achieving the above object, a ring back tone service for providing a group communication service including voice, data, messages, etc. using a push-to-talk (PTT) method An apparatus may be provided.

According to a preferred embodiment, the ring back tone service apparatus includes: a PTT server unit for requesting an incoming call from a SIP server corresponding to the ring back tone server unit to establish a session between the calling terminal and the ring back tone server unit; A media distribution server unit connected to the PTT server unit to perform an update on a ring back tone channel of a PTT channel and a ring back tone channel previously reserved, and to transmit a charging start signal for the ring back tone to the PTT server unit; And the ring back tone server unit for transmitting a ring back tone to the calling terminal when the media distribution server unit gives a talk right to the ring back tone distribution server.

Here, the ring back tone includes a ring back tone corresponding to the calling terminal set by the caller and a ring back tone corresponding to the called terminal set by the called party. The media distribution server sends a floor grant message (Floor Grant) granting a talk right to the call connection tone server, and sends a floor take message (Floor Taken) indicating that the talk right is occupied to the calling terminal.

The PTT server unit connects to the originating terminal that has transmitted the incoming request for the called terminal, requests the group list management unit for incoming information about the called terminal, and receives the received information. The media distribution server unit receives the incoming call from the PTT server unit. After receiving a reservation request for the PTT channel corresponding to the terminal and the ring back tone channel corresponding to the ring back tone server, the PTT channel and the ring back tone channel are reserved.

Hereinafter, a configuration of a ring back tone service method and apparatus for a group communication service according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Or corresponding elements will be given the same reference numerals and redundant description thereof will be omitted.

Group network and stack structure

Hereinafter, a connection relationship with an existing communication network according to a preferred embodiment of the present invention will be described in FIG. 1A, and a protocol stack structure according to a preferred embodiment of the present invention will be described in FIGS. 1C and 1C. In FIG. 1B, the configuration of the group communication network will be described.

1A is a diagram illustrating a connection relationship with an existing communication network according to a preferred embodiment of the present invention, and FIG. 1B is a diagram illustrating a configuration of a group communication network according to a preferred embodiment of the present invention.

Since the group communication method according to the present invention is provided by using an existing communication network, there is an advantage that a group communication service can be provided without a separate infrastructure. Referring to FIG. 1A, after a user terminal (UE) according to the present invention accesses a relay base station (BTS) not shown in the figure, a base station controller (BSC) 120 and a packet control function are provided. Via PCF 130 and Packet Data Serving Node (PDSN) 140, or via Base Station Controller (BSC) 120, Mobile International Controller (MSC) 150, and Myeongdong Interlock (IWF) 150. The group communication network 300 according to the present invention can be connected. The user terminal 100 is divided into a calling user terminal 110 and a called user terminal 120, the calling user terminal 110 refers to one terminal obtained the right to speak, the called user terminal 120 is a It refers to a terminal consisting of more than one group (120-1, 120-2, 120-3, ...).

Referring to FIG. 1B, a user terminal (UE) is connected to a group communication network according to the present invention through an existing mobile communication network, and the group communication network is a group list manager 400, a state management server 500, and a SIP server. 600, a PTT server unit 700, a load distribution unit 800, a media distribution server unit 900 and a node management server (MOMP) (310), for managing billing for such group communication services The billing information management unit 750 may be configured independently as a separate component, or may be provided with one component included in the PTT server unit 700. The charging information generated by the charging information manager 750 is charged in correspondence with each terminal by the charging unit included in the subscriber management server. Here, it is obvious that the charging unit may also be configured independently as a separate component.

Here, the SIP server 600 of the group communication network is connected to the voice mail service server unit 1000 according to the present invention. The ring back tone server unit 1000 performs a function of providing a ring back tone service according to the PTT in association with a group communication service.

The ring back tone server unit 1000 performs a function of providing a ring back tone set by the user instead of the existing mechanical tone. The ring back tone according to the present invention may include a caller set ring back tone providing a ring back tone set by a caller and a caller set ring back tone providing a ring back tone set by a called party. In addition, the call connection sound may be set differently for each call number and time zone.

The Group List Management Sever (GLMS) 400 is a server that performs subscriber information management, contact list management, group list management, and access list management. Presence server (PS) 500 is a server that manages the status information of the subscriber, and maintains the status information of the subscriber until the subscriber logs in and logs out to the group list manager (MGCS). To perform. The SIP server 600 is a server in charge of the SIP Proxy function, performs SIP Digest authentication and SIP signaling Compression (sigcomp) functions, and performs Binary Protocol interworking with the UE for PTT call setup.

The PTT server unit (PTTS, Push-To-Talk Server) 700 may be responsible for call control and session control for the PTT / PTD, and may include a billing information management unit 750. Here, the billing information management unit 750 may include a billing CDR generation unit for generating a billing CDR for the MGCS service and a prepaid billing processing unit for performing a real-time subtraction function for the intelligent network subscriber in conjunction with the DCSP.

Load Distributor (LD) 800 is a system that is responsible for load distribution for a plurality of PTT server unit. The media distribution server unit (MDS) 900 is a system for transmitting bearer traffic for the PTT and PTD services. In the case of the PTT, the media distribution server unit (MDS) 900 may perform a voice control through the RTCP protocol. The node management server (MOMP) 310 may manage shape information, fault information, performance, and statistical information of each node for the group communication service according to the present invention. In addition, the service network may further include the following additional server unit, which is summarized in Table 1 below.

designation function Data Service Control Server (DSCP: Data Service Control Point)  It is a server that collectively controls the processing for the data service of the intelligent network service according to the present invention. File Conversion Server (FCS: File Conversion Server)  It is a server for converting a file transmitted from the media distribution server unit (MDS) in accordance with the subscriber information server unit (JUICE) to the terminal of the receiver. Interlocking East (IWF)  It is a device that provides KTF 2G data service, and provides PPP connection with terminal, interworking with No7 / ISUP with exchange. Subscriber Information Server (JUICE) DB that contains all information about subscribers in KTF. It is a system that includes all information of subscribers registered on WISE computer, such as subscriber's terminal model name, IMSI, intelligent network subscription, subscription plan, MGCS service subscription, and message manager subscription. Group Management Department (MagicN Server) It is a system that manages Buddy registration / deletion and group creation / deletion of MGCS subscriber, and performs the approval process to the corresponding Buddy. Billing server department (MAS) It is responsible for collecting the billing CDR transmitted from PTTS and transmitting it to WISE. Other network interworking server part (MGS) This server is in charge of interworking with other networks for PTT service and is in charge of signaling gateway function and media gateway function. Location Management Server (IPLS: Internet Protocol Location Server) It manages the location and status of 1x and 1xEV-DO subscribers and, when receiving AT Activation request of LMSC, interworks with DNS and SCMM and activates AT. Packet Data Serving Node (PDSN) It is a system in charge of R-P Interface with PCF, PPP Interface with Terminal, and Mobile IP Interface with Home Agent in KTF HPDN. Short Message Service Center (SMSC) It is a system that provides a short message to the subscriber and the system and performs the charging function. Subscriber Management Server (WISE) A system for performing subscriber management, service control, and billing, and the subscriber management server may include a billing system (BS) and a customer care system (CS).

1C and 1D illustrate a protocol stack structure according to a preferred embodiment of the present invention.

1C and 1D, a protocol stack structure in accordance with a preferred embodiment of the present invention is shown. Services that can be provided in the group communication network according to the present invention may include a push-to-talk (PTT) service, an instant messaging (IM) service, and a push-to-data (PTD) service. Hereinafter, a protocol stack structure for each service will be described. For convenience of description, the protocol stack structure is provided to a group communication network through a base station controller (BSC), a packet control function unit (PCF), and a packet data serving node (PDSN). The description will be made based on the case of connection.

FIG. 1C (a) is a diagram illustrating a stack structure on a user plane in a PTT service. According to a preferred embodiment, the mobile terminal and the media distribution server unit may provide a PTT service using the RTP / RTCP protocol.

FIG. 1C (b) is a diagram showing a stack structure on a user plane in a PTD service. According to a preferred embodiment, the mobile terminal, the SIP server unit and the PTT server unit may provide a PTD service using the Message Session Relay Protocol (MSRP) protocol.

FIG. 1D (a) is a diagram showing a stack structure on a user plane in an IM service. According to a preferred embodiment, the mobile terminal, the SIP server unit and the PTT server unit may provide an IM service using a Session Initiation Protocol (SIP) and a Session Description Protocol (SDP) protocol.

(B) of FIG. 1D is a diagram showing a stack structure on a signaling plane. According to a preferred embodiment, the mobile terminal, the SIP server unit and the PTT server unit can transmit and receive signaling messages using the Session Initiation Protocol (SIP) and Session Description Protocol (SDP) protocols.

Group type and management

The present invention can provide a convenient user interface for convenient group communication by providing a user interface (UI) such as information on a state that the other party can receive on each mobile terminal screen.

As shown in Table 2 below, a group according to the present invention may include a default group, a predetermined group, a chat group, and an ad hawk group.

Default group A preset group by default Pre-define group A group that you specify randomly and has fixed members in that group Chat group Group that is randomly assigned by the user and does not have members in the group Ad-hoc group Select group in real time

The default group refers to a group in which group call is possible by simply operating a PTT dedicated key without selecting a particular group among groups managed by the terminal UI. According to the present invention, in the case of a corporate subscriber, a group administrator is designated, and a general user who is not the administrator cannot add / delete group members, and only the group administrator can add or delete group members. . According to the preferred embodiment, if the corporate subscriber is registered in the default group, the pre-specified group cannot be set as the default group, and if it is not registered in the default group, the default group can be set in the same manner as the general subscriber. Can be. In the case of a general subscriber, one of the predesignated groups managed by the subscriber may be set as the default group and managed. If the general subscriber does not have a default group set, the terminal and the server recognize the highest level group as the default group, and the default group of the corporate subscriber is displayed on the terminal user interface with the same default group as the members of the group. The group list management unit GLMS matches the default group setting information for the corresponding subscriber with the terminal, and the general subscriber is configured to notify the group list management unit GLMS of the change as soon as the default group is changed.

Pre-define group is a group arbitrarily designated by the user and has a fixed member in the group. The subscriber can create and delete the group existing on his UI, and can add and delete members of the group. When creating / deleting a preset group of a subscriber or adding / deleting a group member, the terminal should immediately perform a change request to the group list management unit (GLMS).

A chat group is a group arbitrarily designated by a user, and a group does not have a member in the group. The user requests the group list management unit GMLS to create a chat group and maintains the group for a predetermined time. Members who want to make a call through the chat group must receive a text message (SMS noti.) From the creator of the chat group and join the corresponding chat group to perform the chat group call. The group list management unit GLMS maintains the chat group for a specific time and deletes the chat group if the corresponding time expires.

Ad-hoc groups are created when a subscriber requests a group call by selecting two or more buddies from a specific group of the user interface and a contact list, and is not managed by the group list management unit (GLMS). Say When a subscriber requests an ad hoc group call, the PTT server unit (PTTS) may set a temporary group and manage it while the call session is maintained.

Call back tone server connection procedure

2A to 2D are flowcharts illustrating a method of accessing a ring back tone server for a ring back tone service according to an exemplary embodiment of the present invention. 2A and 2B are flowcharts illustrating a server access method, and FIGS. 2C and 2D are flowcharts illustrating this in more detail.

Although the incoming time for the group communication service such as PTT is greatly reduced, when the connection with the existing 2G communication network takes a long time for registration or when the called terminal is in the manual mode, the incoming call is not available. Since some time is required, in this case, the present invention may provide a ring back tone service associated with a group communication network. Hereinafter, the PTT service of the group communication service will be described with reference to FIGS. 2A and 2B illustrating a connection ring server connection procedure according to the present invention. For convenience of description, descriptions of FIGS. 2C and 2D will be omitted.

In step S201, when a call is requested from the calling terminal UE1 to the called terminal UE2, the calling terminal connects to the PTT server via the SIP server connected to the calling terminal. In step S203, when the PTT server unit requests the state management server to change the state information of the calling terminal, the state management server changes the state of the calling terminal to the calling state. In step S205, the PTT server unit accesses the group list manager to access the called terminal to extract incoming information of the called terminal. In step S207, when the PTT server unit requests the media distribution server to reserve the channel for the PTT and the ring back tone using the incoming information, the media distribution server unit performs the reservation for the PTT channel and the ring back tone channel.

In step S209, the PTT server unit requests a PTT call to the SIP server corresponding to the called terminal, and in step S211, the SIP server unit requests and receives status information of the called terminal from the state management server. In step S213, when the PTT server unit requests an incoming call for providing the ring back tone to the SIP server corresponding to the ring back tone server unit, in step S217, the SIP server unit requests the PTT incoming call to the called terminal, and then the ring back tone until the PTT incoming call. In order to provide a ring back tone request to the ring back tone server unit, the session is established with the ring back tone server unit. Here, the PTT incoming to the called terminal is limited to the case where it is set to the manual mode, and when set to the auto mode, it is configured to be called with the called terminal without additional incoming signal.

In step S219, the PTT server unit requests the media distribution server unit to update the ring back tone channel so that the media distribution server unit updates the channel. In step S221, the media distribution server unit notifies the start of billing, and in step S223, transmits a floor grant message (Floor Grant) granting the right to speak to the ring back tone server, and in step S225, a floor right occupation message informing that the floor is occupied. (Floor Taken) is sent to the calling terminal. In step S227, the ring back tone server unit extracts the ring back tone corresponding to the calling terminal or the called terminal and provides it to the calling terminal.

In this case, when the manual mode is set, the ring signal is continuously transmitted through the PTT channel in step S229. When the incoming button is operated by the called terminal, the PTT server unit recognizes the signal in step S230 and notifies the end of the ring back tone. Will receive.

In step S231, the PTT server unit requests the media distribution server to update the ring back tone channel, and the media distribution server unit updates the channel to terminate the ring back tone service. In step S232, the PTT server unit requests the media distribution server unit to update the PTT channel to the media distribution server unit to update the channel in the media distribution server unit. In step S233, the media distribution server unit notifies the PTT server unit of the charging start, and in step S234, a floor right occupancy message (Floor Taken) indicating that the floor right is occupied is sent to the called terminal. In step S225, when the media distribution server unit transmits a floor grant message (Floor Grant) for granting the right to speak to the calling terminal, the calling terminal may transmit voice data to the called terminal.

Connection method of group communication network

The group communication service according to the present invention includes a push-to-talk (PTT) service, an instant messaging (IM) service, and a push-to-data (PTD) service, and can provide a ring back tone service for all the services. Of course it is. Here, in the case of the group communication service targeting the group according to the present invention, a plurality of destination terminals can listen to the voice of the calling terminal using their respective terminals, thereby overcoming the limitation of the one-to-one communication of the existing voice call. can do,

Push-To-Talk (PTT) service is a half-duplex based voice call function and can provide voice call service between a plurality of users through voice control. Private (1: 1) call and group (Default, Pre-define, Chat, Ad-hoc group) call are available and can operate in Session Mode. Here, the PTT service is limited to support only one session per subscriber, and PTD and IM services are simultaneously provided together with the PTT service.

Instant Messaging (IM) service is a full-duplex instance messaging service that operates in Pager Mode. Here, the Multi service can be simultaneously provided to the IM service, and as described above, it can be simultaneously provided to the PTT and PTD services.

Push-To-Data (PTD) service is a full-duplex file transfer service, operates in a TCP-based session mode, and may provide a file conversion function for heterogeneous terminals. Multi service can be simultaneously provided for the PTD service, and PTT and IM service can be simultaneously provided.

In addition, the present invention may provide status information for each service, where the status information service may provide not only status information of the subscriber but also status information on buddies and group members managed by the subscriber. In addition, the state information service may provide a location based service of a subscriber in association with a location based service (LBS). Hereinafter, a procedure of providing a group communication service according to the present invention will be described with reference to FIGS. 3A to 3E.

3A is a flowchart illustrating a login method of a group communication network according to an exemplary embodiment of the present invention.

Group communication service according to the present invention does not go through a dial or a ring tone, and can provide a quick communication with a quick response time compared to the existing mobile phone calls, PTT (Push-To-Talk) service, IM (Instant) It may include a Messaging service and a Push-To-Data service. Login to the group network to receive these services. That is, the authentication method may be performed through second authentication. Hereinafter, a description will be given with reference to FIG. 3.

In step S305, when the client program for group communication is driven, the user terminal automatically receives and receives its contact list information from the group list manager GLMS. (HTTP Request / Response)

In step S310, if the user terminal transmits a registration request message (SIP REGISTER) to the SIP server unit (SIPS), in step S315, the SIP server unit (SIPS) is received from the user terminal ID (for example, hexa ID) Requests primary authentication to the group list manager (GLMS) with and password. (Auth_Request)

In step S320, the group list management unit GLMS requests an authentication to the location management server unit IPLS again with the source number IMSI and the IP address of the user terminal, and the location management server unit IPLS sends the source number / IP address. The second authentication is performed after determining whether the DB value is identical with the DB value. (MS_Info_Request / MS_Info_Response)

In step S325, when both the first and second authentications pass, if the group list management unit GLMS successfully responds to the SIP server unit SIPS, in step S330, the SIP server unit SIPS is the state management server unit PS. Inform the authentication result of the user terminal. (PLSP AddTuple_Request / AddTuple_Response)

If the authentication result from the group list manager GLMS is successful (SIP 200 OK), in step S335, the user terminal requests member information for each Contact List group from the group list manager GLMS and receives the received member information.

In step S340, the user terminal makes a request to the state management server unit PS via the SIP server unit SIPS to find out the state information of each group member. (SUBSCRIBE) In step S350, the status management server unit PS notifies the user terminal of the configuration member for the group via the SIP server unit SIPS. (NOTIFY) Here, in the case where a plurality of groups exist, it is configured to repeat the steps S340 (group member information grasp) and step S350 (group member status grasp status information) for each group.

3B is a flowchart illustrating a logout method of a group communication network according to a preferred embodiment of the present invention.

In step S405, the user terminal requests logout to the SIP server unit (SIPS). (REGISTER) In step S410, the SIP server unit (SIPS) requests the state management server unit (PS) to delete from the SIP location service (SIP Location Service) management target for the user terminal and receives the result. In step S415, the SIP server unit (SIPS) notifies the user terminal of the logout completion response.

3C is a flowchart illustrating a method of updating a self state of a group communication network according to an exemplary embodiment of the present invention.

In step S505, the user terminal requests the status management server unit PS to update its own status via the SIP server unit SIPS using the update information command PUBLISH. In step S510, the state management server unit PS notifies the user terminal of the successful update. In step S515, the user terminal makes a request to the state management server unit PS via the SIP server unit SIPS to find out the constituent members of each group. (SUBSCRIBE)

In step S520, the state management server unit PS requests and receives a configuration member for the group for which the inquiry is requested from the group list management unit GLMS. (SUBSCRIBE / NOTIFY) In step S525, the state management server unit PS notifies the user terminal of the state information on the group configuration member via the SIP server unit SIPS. (NOTIFY) Here, if a plurality of groups exist, the procedures of step S515 (group member status information request), step S520 (group member information request) and step S350 (provide status information of group members) are performed for each group. Configured to repeat.

The present invention can perform the group state update in the above-described manner as well as the self state update. Here, the request message according to the self state and the group state update may be performed using a preset identifier.

3d is a flowchart illustrating a group state inquiry method of a group communication network according to an exemplary embodiment of the present invention.

In step S605, the user terminal 1 makes a request to the state management server unit PS for the group to be queried via the SIP server unit SIPS. (SUBSCRIBE) At this time, the user terminal 1 may request that the inquiry group be informed of the continuous status for the next T seconds. In step S610, the state management server unit PS requests and receives a configuration member for the group for which the inquiry is requested from the group list management unit GLMS. (SUBSCRIBE / NOTIFY) In step S615, the status management server unit PS requests another status management server unit PS2 if it does not have member status information received from the group list management unit GLMS. (Qeury Presence / Response) In step S620, the state management server unit PS notifies the user terminal 1 of the member information which is being managed by itself and the status information on the received and received member. (NOTIFY)

When the release time is set in the user terminal 1 to a specific time T and the user terminal 2 is included in the group member, the user terminal 1 is automatically and immediately notified whenever the user terminal 2 updates its status during the corresponding time. In the case where the user terminal 2 updates the status in step S625, when the other state management server unit PS2 notifies the state management server unit PS1 of the state change in step S630, in step S635, the user terminal 1 automatically and immediately Be notified.

Likewise, if the user member 3 is included in the group member, the user terminal 1 is automatically and immediately notified whenever the user terminal 3 updates its status during the corresponding time.

When the user terminal 3 updates the status, in step S640, the status management server unit PS1 recognizes this, and in step S645, the user terminal 1 is automatically and immediately notified.

3E is a flowchart illustrating a method for adding a contact list member of a group communication network according to an exemplary embodiment of the present invention.

In step S705, the user terminal 1 requests the Web server to add a new user terminal 2 to its Contact List. (HTTP: AddContact) In step S710, the Web Server, which has been requested to add a member, requests authorization from the user terminal 2 via the SMSC in the form of a short message. In step S715, the user terminal 2 that has received the short message manually responds to the approval. It can be checked or canceled by using the URL Callback function of the short message. (HTTP: Accept_Request on Approval, HTTP: Reject_Request on Decline)

In operation S720, when the user terminal 2 receives the result of approval, the Web server requests the group list manager GLMS to add the user terminal 2 to the contact list of the user terminal 1. In step S725, the Web server notifies the user terminal 1 that the approval request to the user terminal 2 is confirmed via the SMSC in the form of a short message.

In step S730, when the user terminal 1 re-requests its own contact list information, the web server notifies the user terminal 1 of the list in which the user terminal 2 has been added. In step S735, the user terminal 1 requests the status information of the contact list member to the status management server unit PS via the SIP server unit SIPS. (SUBSCRIBE) In step S740, the state management server unit PS requests and receives a configuration member for the group from the contact list that has been requested for inquiry to the group list management unit GLMS. (SUBSCRIBE / NOTIFY)

In step S745, the state management server unit PS notifies the user terminal 1 of the most recently updated Contact List member status via the SIP server unit SIPS. (NOTIFY) Here, the description is based on the case of notifying through a short message, but it is natural that notification can be made through other data services.

Group List Manager

4 is a diagram illustrating a configuration of a group list manager according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the group list manager may include a subscriber register 410, a subscriber authenticator 420, a subscriber information manager 430, a contact list manager 440, and an access list manager 450.

When a subscriber tries to register to receive GLMS service, the subscriber registration unit 410 may perform registration by providing contact list, group list, and access list information for the corresponding subscriber. have. The subscriber registrar 410 stores subscriber information about a subscriber who has attempted to register, and may perform re-registration and deregistration for a subscriber who has requested re-registration and deregistration. The subscriber registration unit 410 may provide a registration cancellation function for a registration cancellation request from the subscriber in the registration process.

The subscriber authentication unit 420 may perform service authentication through HTTP Digest authentication when registering a subscriber. In this case, the subscriber authentication unit 420 is configured to interwork with IPLS for authentication of illegal subscribers, and when registering subscribers, it may perform authentication for the corresponding subscriber. In addition, the subscriber authentication unit 420 must manage a list of subscribers that have failed authentication, and is configured not to provide a group list management unit (GLMS) service to subscribers that have failed authentication.

When the subscriber information management unit 430 registers the first terminal to the customer management server unit according to the present invention, the subscriber information management unit 430 performs a function of receiving, storing and managing the registered subscriber information. It may include subscriber attributes such as host ID, hexa ID, screen name, answer mode, and do-not-disturb (DND) of the subscriber. Naturally, the subscriber information can be updated in real time at the request of the subscriber. In the present invention, a text message indication (SMS noti. Indicator) field for receiving an SMS message to an offline subscriber must be managed, and when a request for information on a called subscriber of the PTT server unit (PTTS) for the caller's invitation is requested. May provide the above information.

The contact list manager 440 may perform a function of managing a group and a contact list set by the subscriber. Here, the group list stores and manages information such as a default, a predetermined designation, and a chat group. Each group information may include a group name, a group member, a group member ID, and status information of the group member. Here, the chat group exists only a group name, and is configured to store and manage group information other than the group name when the chat service is actually requested. Here, the contact list may store a group name set by an individual or a specific subscriber. In the case of an individual, a name, status information, location information, and the like may be stored. In the case of a group, a group name, a group creator name, and the like may be stored. The subscriber's group and contact list change (addition and deletion) requests are updated in real time, and individual, group or contact list information can be transmitted at the subscriber's request.

The access list manager 450 may set an access list regarding whether to allow a caller's service request in each terminal, and the group list manager GLMS may manage the access list. It is divided into a "Reject list" and an "Aaccept list", and when the subscriber is registered, the Group List Management Unit (GLMS) can transmit the access list information to the subscriber. Can be updated.

The interworking unit 460 is a SIPS interworking unit 461 for interworking with SIPS for subscriber registration, authentication, group list management, contact list management, and access list management, PTT server unit for PTT / PTD call processing and IM service provision. A PTTS interworking unit 463 for interworking with the PTTS and a state information management server unit PS 465 for changing parental information of the subscriber may be included. In addition, the linkage unit 460 is a WISE linkage unit 467 for interworking with a subscriber management server unit (WISE) to obtain the subscriber's information at the time of initial subscriber registration, and the WISE linkage unit 467 performs IPLS for subscriber authentication. And an interworking unit 469 for interworking with the group registration server unit for performing interworking with the Magicen Server for the buddy / group information change of the subscriber and the buddy approval procedure. have.

In the IPLS interworking unit 468, the Mobile Directory Number (MDN) / International Mobile Subscriber Identity (IMSI) is a group list management unit (GLMS) using a value included in a SIP register message of a terminal or a HexaID included in a SIP register value as a key. ) It can be the value extracted from DB. Here, when HexaID is extracted as a key, the IMSI / MDN value bound with HexaID can be used as an input value in the group list management unit (GLMS) DB instead of the IMSI (or MDN) value sent from the terminal. IPLS interworking may be configured to be approved only when logged in with the ID of the registered UE. Therefore, when registration is performed by the caller ID / Password to another user's terminal, it may be configured to be treated as an IPLS Subscriber IP Address Mismatch.

State management server part

5 is a diagram showing a configuration of a state management server unit according to a preferred embodiment of the present invention.

Referring to FIG. 5, the state management server unit 500 according to the present invention may include a subscriber state management unit 510, a query response unit 520, and an interworking unit 530.

The subscriber status management unit 510 is a subscriber information maintenance unit 511 for maintaining subscriber information until the subscriber logs in the program and then terminates the program. And a subscriber information changing unit 513 for performing information change according to the cancellation of registration, an information providing unit 515 for storing the information of the corresponding subscriber when registering the subscriber and providing status information of the members on the contact list of the subscriber. Field management unit 517 for managing and changing subscriber information and status information fields stored and managed. In consideration of the characteristics of the mobile communication network, the subscriber state management unit 510 according to the present invention may synchronize state information on subscribers and groups between a terminal and a server without putting a load on an existing mobile communication network.

The query response unit 520 may perform a response to the IP address and status inquiry for the called subscriber from the SIP server unit (SIPS) when the subscriber is called.

The interworking unit 530 is a SIPS interworking unit 531 for performing an interworking function with the SIPS for subscriber registration and status information management, and a GMLS interworking unit 532 for interworking with GMLS for subscriber group and contact list management. And an IPLS interworking unit 533 for interworking with the IPLS periodically to update the status information of the subscriber. Here, when the interworking result by the IPLS interworking unit 533 is 'AT member' Can be updated with 'OffLine'. In addition, the linkage unit 530 may further include an LBS linkage unit 534 for interworking with the LBS to update the location information of the subscriber.

SIP server

6 is a diagram illustrating a configuration of a SIP server unit according to a preferred embodiment of the present invention.

SIP server 600 according to the present invention is a proxy unit 605, retransmission unit 610, response unit 615, upgrade unit 620, compression unit 625, protocol unit 630, SDB unit ( 635 and the linkage unit 640 may be further included.

The proxy unit 605 performs a SIP Proxy and Routing function, and may perform a Digest Authentication function when a subscriber first logs in. The proxy unit 605 performs an IP address lookup function to the PS to transmit a SIP message to the called subscriber, and may provide a detection function for a looped request and a loose routing function. The retransmission unit 610 performs a retransmission function for the transmitted SIP message, and according to a preferred embodiment, may retransmit the message by the retransmission timer, and the response unit 615 may be sent to the state management server unit. When the subscriber IP address is inquired, the result of not being able to send an incoming message to the offline subscriber can be transmitted to the PTT server unit (PTTS).

The upgrade unit 620 may perform a function of upgrading additional services according to 3GPP / 3GPP2 and other standards without changing the H / W platform. For example, the upgrade unit 620 performs a function of upgrading a network to perform a video calling system and a packet network based switch CSCF (Call State Control Function) function.

The compression unit 625 may perform a function of performing compression in accordance with an optimal compression ratio and a preset standard. According to a preferred embodiment, the compression unit 625 may support SigComp (Signaling Compression). That is, the compression unit 625 operates as an endpoint of SigComp, which is a message compression function, when SIP interworking with a user element (UE), compresses a SigComp message for a SIP message between a user element (UE) and a SIPS, and It may provide a decompression function.

The protocol unit 630 may accommodate the Binary Protocol and operate as a Binary Protocol when the SIP is interworked with the UE. Here, the protocol unit 630 may perform reception / interpretation and generation / transmission of the Binary Protocol message, and the SIP message. It is configured to enable Binary Protocol message or SIP message interworking.

The SDB unit 635 may perform a function of transmitting an "SDB Indicator" in order to use an SDB function of transmitting a Binary Protocol message on a common channel (PCH / ACH) on a CDMA wireless network. According to a preferred embodiment of the present invention, when using the "SDB Indicator" field, it is configured to use the upper 2 bits of the TOS field of the load distribution unit (LD) of the IP Header field, or to use the Option field of the IP Header field. Can be.

The interlocking unit 640 is a PTTS interlocking unit 641 for interworking with a PTT server unit (PTTS) for PTT / PTD / IM call processing. DNS to get IP address from Domain when routing SIP message, with GLMS interlocking unit 643, GLMS interlocking unit 643 for linking with group list management unit (GLMS) for subscriber registration, authentication and group management. And the PS interworking unit 645 for interworking with the Presence Server for the Location inquiry of the called UE.

PTT server section

7 is a diagram showing the configuration of the PTT server unit according to an embodiment of the present invention.

Referring to FIG. 7, the PTT server unit according to the present invention includes a call controller 710, a session controller 720, an IM service provider 730, a PTD session setup unit 740, a billing CDR generator 760, and a prepaid payment. It may include a billing processing unit 765, SMS communication unit 770 and interlocking unit 780.

The call control unit 710 performs call control for 1: 1 and 1: n PTT voice calls. In the case of a group call, the call controller 710 may perform call control according to a preset method for a default, a chat, a predetermined call, and a call request for an Ad-hoc group. In addition, the call controller 710 may identify the corresponding destination member (s) through the message of the caller who requested the call, and obtain information on the member (s) for which the call is requested through the group list manager GLMS. . In addition, the call controller 710 may allocate a media resource by requesting a media distribution server unit (MDS) to allocate a media resource for the corresponding call. After the call controller 710 transmits the incoming message, the call controller 710 may drive a timer for waiting for a response, and transmit a command for retransmission to the retransmission unit.

The call control unit 710 receives a text message designator (eg, a SMS noti. Indicator) from the group list management unit GLMS when the state of the member (s) for which the call is requested is in an "Offline" state. Call reception unit 711 for receiving and performing an incoming call using a text message, a specific call end unit 712 where only a specific member can terminate a call during a group call, and a call session from a media distribution server unit (MDS). If all the members who participated are notified that there is no traffic transmission for a certain period of time (timer), the session end portion 713 for terminating the call session, and the subscriber who participated in the call session may invite additional members to the call. If so, it may include a call adder 714 for adding the member to the session and participating in the call session.

In addition, the call control unit 705, even if the member initially rejected the call request, the re-addition unit 715, the call session to re-join the call at any time while the call session is maintained by the doctor After this is set, the status information providing unit 716 for changing the status information by notifying the state management server (PS) of the call session creator and the participant with the status information of the participants in the call session. The member information providing unit 717 for notification may further include a call release unit 718 for releasing the entire group call by the member who originally requested the call.

The session controller 720 may perform a function of processing session control and session related events. The session controller 720 may manage session information of subscribers participating in each call session, and if a specific subscriber wants to participate in an already created call session, whether the subscriber has a right to participate in the call session. Check and, if authorized, participate in the call session. When the session controller 720 requests an additional member not participating in the call session to participate in the call session, the session controller 720 performs a function of joining the member to the call session under the control of the call controller 710. Status information of the additionally participated subscriber is reported to the group list management unit (GLMS) at the time of additional participation is configured to change the status information. And, if the participant participating in the call session wants to leave the call session, the session controller 720 is configured such that only the corresponding subscriber can leave while the call session is maintained, and the state information of the withdrawn subscriber is withdrawn. At this point, the group list management unit GLMS may report the status information.

The instant messaging (IM) service provider 730 may provide an IM service based on a pager mode using a SIP message, and may be simultaneously performed with a PTT service.

The push-to-data (PTD) session setting unit 740 performs a call processing function for providing a PTD service, and in the case of a group session for a PTT call, a method of transmitting a PTD to the corresponding group member and a PTT call group; Call processing may be performed by transmitting a PTD to another member. Similar to the PTD call setup, the method for releasing the PTD session may be implemented for the PTD session release for the PTT talkgroup member and the PTD session release method for the PTT talkgroup and other members, respectively, and may be simultaneously performed with the PTT service.

The billing CDR generation unit 760 performs a billing CDR generation function for PTT, PTD, and IM services, and can generate individual billing CDRs and transmit them to the billing server unit (MAS) even during simultaneous services of PTT, PTD, and IM. . In the case of the PTT, a CDR of a speech unit is generated and the billing CDR for each group type is transmitted to the billing server unit (MAS) .In the case of a PTT group call, the subscriber speaks about an additional member who joins or leaves during one member's speech in a call session. When this is done billing CDR is generated, it is configured not to be considered. In addition, the billing CDR generation unit 760 generates a billing CDR per case in the case of IM and PTD, and generates a billing CDR for the subscriber who has received a call completion (200 OK) response from the called party in the case of group transmission, and then billing server unit. (MAS) can be sent.

The prepaid billing processing unit 765 may perform a real time prepaid subtraction function in conjunction with a data service control server unit (DSCP) when the caller is an intelligent network subscriber. In the case of PTT, when the subscriber who requested the right to speak is an intelligent network subscriber, the amount of money used when requesting balance information to the data service control server (DSCP) and release the right to speak is transmitted to the data service control server (DSCP) in real time. I can deduct it. When the subscriber of the intelligent network acquires the right to speak and the balance is exhausted and receives the service interruption message from the data service control server unit (DSCP), the PTT server unit (PTTS) immediately receives the media distribution server unit (MDS). The request for release of the right to speak to the subscriber is no longer allowed to speak, but the PTT terminating service for the subscriber is configured to continue.

The text message transmitter 765 may transmit a connection message to the group communication service through a text message such as a short message for an incoming service to an offline subscriber.

The interlocking unit 780 is interlocked with the group list management unit GLMS, the SIPS, the load distribution unit LD, the media distribution server unit MDS, the billing server unit MAS, and the other network interworking server unit MGS. When the list management unit (GLMS) service, the group list management unit (GLMS) may be linked to obtain individual subscriber information or group information. In addition, the linker 780 may be linked with the SIPS through the load balancer LD for PTT and PTD call processing. In addition, the interlocking unit 780 is a billing server unit for transmitting the billing CDR for the media distribution server unit (MDS), the general subscriber to the subscriber management server (WISE) in order to send and receive PTT / PTD media session settings and billing information (MAS) and interworking with the data service control server unit (DSCP) for real-time billing processing and the message service center and the interworking with the message service for the incoming message to the offline subscribers.

Load balancer

8 is a view showing a configuration of a load distribution unit according to a preferred embodiment of the present invention.

Referring to FIG. 8, a configuration of a load distributor (LD) according to a preferred embodiment of the present invention will be described. The load distributor 800 may distribute media for providing a PTD service. A function of allocating load to a plurality of PTT server units according to a UE environment of a subscriber to be delivered for each content requested from a server unit (MDS) is performed.

The load distributing unit 800 searches for the UE environment of the corresponding subscriber with JUICE to know the UE environment of the subscriber and the PTT server according to the information extracted by the environment information extractor 810 and the information extracted from the environment information extractor. It may include a PTTS selector 820 for selecting a part.

The load distributing unit 800 further includes an interlocking unit 830. The interlocking unit 800 receives a conversion request for a specific packet from a media distribution server unit (MDS) and converts it to a UE environment. A media distribution server unit (MDS) interworking unit returned to the media distribution server unit (MDS) and environment information, it may include a JUICE interlocking unit for extracting the terminal environment of the subscriber.

Media distribution server unit and voice control

9 is a diagram showing the configuration of a media distribution server unit according to a preferred embodiment of the present invention. Hereinafter, the media distribution server unit and the voice control structure will be described.

Referring to FIG. 9, a media distribution server 900 according to an exemplary embodiment of the present invention may include a media session controller 910, a media distributor 920, a voice control unit 930, and a voice. The unit billing information generation unit 940, a duplication unit 950, and an interlocking unit 960 may be included.

When the media session controller 910 receives a resource allocation request from the PTT server unit PTTS from the media distribution server unit MDS during the creation of the call session, the media session controller 910 performs a function of allocating resources in response to the request. Here, the resources of the media distribution server unit MDS allocated to the initial call session may be expanded and reduced as necessary. In addition, the media session control unit 910 receives only bearer traffic from the user who has the right to speak, and receives the bearer traffic sent by the user who does not have the right to speak. An upgrade unit 913 may recognize a call session withdrawal of a specific member among participating members and perform a real-time media session upgrade according to the withdrawal.

The media distribution unit 920 may perform a function of analyzing, copying, and distributing media. The media distribution unit 920 may classify and analyze bearer traffic entering the media distribution server unit MDS in a preset manner according to its attributes. According to an embodiment of the present invention, the media distribution unit 920 uses an RTP / UDP protocol for PTT bearer traffic transmission, an MSRP / TCP protocol for PTD bearer traffic transmission, and voice control and QoS. The RTCP protocol is used for feedback. Here, the RTP packet entered into the media distribution server unit (MDS) may be copied as much as the user participating in the call session except for the user who has the voice, and then distributed based on the destination IP of each user.

The TCP packet entering the media distribution server unit (MDS) is converted and distributed according to the subscriber terminal environment in accordance with the file conversion server unit (FCS) as necessary, and the voice packet and the file packet are simultaneously transmitted through the media channel. In this case, the file packet may be provided so as not to affect the voice quality. Here, the media distribution server unit (MDS) is configured to release the media channel when media traffic is not transmitted for a specific time within a preset media session using a specific timer.

The talk right control unit 930 may control only one talk right to be allowed at the same time in one call session. The talk control unit 930 is configured to grant a call talk right to the first user who requested the talk right, and to ignore the other talk request requested before the call talk is released. In addition, the talk right control unit is configured to transmit the release information to the PTT server unit after releasing a talk right in the call session when a user having a talk right sends a talk right release message. Here, the media distribution server unit (MDS) controls a particular member using a timer for a predetermined time after obtaining a speaking right by using a timer, and after the member obtaining the speaking right obtains the speaking right, the user is silent for a predetermined time. If the state is maintained, it is configured to take measures such as releasing the voice. In addition, the voice control unit 930 may perform state management of each user who participated in the PTT session and a user who has acquired the voice.

The right to speak unit billing information generation unit 940 performs a function of generating the billing information in the right to speak unit of each talk right participating in the PTT session. Here, the charging information of the talk right unit is configured to notify the PTT server unit (PTTS) when the talk right of the talk right is released. When the PTT session ends, the floor right billing information generation unit 940 generates session billing information. The session billing information may be notified to the PTT server unit (PTTS) when the corresponding session ends. According to an embodiment of the present invention, in the case of a PTD session, the billing information may be generated in units of transmission of the speaker (see group transmission in case of group). The billing information for each PTD service case is notified to the PTT server unit (PTTS) immediately after the end of the PTD session.Also, in connection with the PTT server unit (PTTS) for the exhaustion of the balance of the subscribers of the intelligent network, the right to speak can be granted to the speaker. It is configured not to.

The redundant unit 950 may perform a function of managing media sessions when there are a plurality of media distribution server units (MDSs), and for each of the plurality of media distribution server units (MDSs), each media distribution server unit (MDS). ) Can provide a load sharing function to share the same load. Here, it is obvious that the redundancy unit may be configured as a multiplexer.

The interlocking unit 960 interlocks with the file conversion server unit (FCS) for file conversion for each terminal for the PTTS interworking unit 961 and the PTD service for interworking with the PTT server unit (PTTS) for PTT / PTD call processing. It may include an FCS linkage unit 963 to. In this case, the PTTS interworking unit 961 is configured to interwork with a user when performing the PTT service, and to interwork with the TCP when performing the PTD service.

The format for transmitting a right control message according to an embodiment of the present invention may use an RTCP APP packet. Referring to Table 3 below, the talk control protocol stack and the talk control message according to the preferred embodiment of the present invention are summarized.

Layer Protocol Application Floor control application (RTCP APP format) Transport UDP Network IP Data Link Network Access Protocol (IEEE802.3, Ethernet) Physical Layer 10 / 100Base-T

 Message type Subtype Application-dependent data Remarks (based on MDS)  Floor Request 0 none Incoming  Floor grant One none Sent  Floor taken 2 CNAME / NAME Sent  Floor Deny 3 Reason code / length / reason phrase Sent  Floor release 4 Sequence number of last packet / padding Incoming  Floor idle 5 none Sent  Floor revoke 6 Reason code / additional information Sent

Here, the floor request message (Floor Request) is a message for requesting permission to speak to the MDS in the terminal. A floor grant message (Floor Grant) is a message that the MDS gives the right to speak to the terminal. The floor taken message is a message indicating that the MDS is occupied by the terminal. In addition, the floor deny message (Floor Deny) is a message indicating that the request for the MDS denial of speech to the UE requesting the right to speak, may be configured in the form shown in Table 5.

ADD Length (octets) Description Reason Code One Reason for denial of speech Length One Length of Reason Phrase Reason Phrase 6 String with additional information (filled with 0 if none)

In this case, the code value of 1 may indicate that the voice is already occupied, and the code value of 2 indicates an internal PTTS server error.

A floor release message (Floor Release) is a message to inform the MDS that the terminal has released the right to speak, the floor idle message (Floor Idle) is a message indicating that the MDS is not currently occupied the right to speak. And the floor right cancellation message (Floor Revoke) is a message for canceling the speech permission granted to the terminal MDS, it may be configured in the form shown in Table 6.

ADD Length (octets) Description Reason Code 2 Cause of invalidity Additional information 2 Additional Information (Depends on Code)

In this case, when the code value is one, only one speaker may be present in the session, and if the code value is two, it may be configured to refer to a case in which the speaking time for one person is exceeded. In this case, when the code is 2, a retry-after timer value is included in additional information, and no packet is transmitted until this timer expires.

Table 7 below summarizes the voice control protocol timer according to the preferred embodiment of the present invention. The start time and the end time of the timer are defined according to each condition. When the timer ends, the preset operation is configured to be performed, and the speaking time may be controlled according to the speech control protocol timer.

Timer name Start time Stop (reset) time point Expire Behavior Remarks End of RTP media timer (T3) At the end of RTP media When RTP media continues or this timer is Expire Judging that the RTP stream has ended, Idle Floor status Up to 6 seconds between 3-5 seconds Stop talking timer (T8) At the beginning of the talk burst At the end of the talk burst Determining sufficient talk time for the user, and sending Floor Revoke message to the user Differential setting by user group Floor revoked grace timer (T4) Expire of Stop talking timer Floor status is Idle and floor Idle packet is broadcast Between 2-3 seconds Inactivity timer (T7) At the end of the talk burst When receiving Floor Request message or RTP media Ended talk session Differential setting by user group Sender report timer (T9) Receive Floor Release message or expire 'end of RTP media timer' When an SR report is received from the UE which started the sender report timer I believe the SR report is lost Receiver report timer (T10) When MDS Sends RTCP SR When RR report is received from UE which started Receiver report timer I believe the SR report is lost Floor idle timer (T2) When sending the first Floor Idle message When receiving Floor Request message or when Talk burst starts or when Inactivity timer expires. Resend the Floor Idle message (transmission cycle uses an exponential back off algorithm (e.g. Fibonacci sequence)) Number of resends is between 1 and 100 (default: 9 times) Floor revoke timer (T5) When the Stop talking timer expires (When sending a Floor Revoke message) Expire City Resend Floor Revoke Messages Number of resends is between 1 and 10 (default: 3 times) Retry after timer (T6) When the Stop talking timer expires (When sending a Floor Revoke message) Give voice to the user who sent the Floor Request message Include this timer value in Floor Revoke messages between 5 and 30 seconds

In addition, the charging server unit according to the present invention is charged based on the sender. That is, the billing standard according to the present invention is configured to charge subscribers who have a voice in PTT as a sender and subscribers who transmit contents / messages as PTD / IM as senders. In addition, it may include a media gateway server (MGS) signal converter and a media converter, which are not shown in the figure. Signal conversion unit Signaling conversion function for the call establishment request message transmitted from the PTT server unit (PTTS) or the call establishment request message from the other network can be performed. When the media converter interworks with another network, the media converter may perform a conversion for voice traffic transmitted from another network subscriber or voice traffic transmitted to another network subscriber. The file conversion server unit according to the preferred embodiment of the present invention may include a file conversion unit and an interlocking unit. The file conversion unit provides a file conversion function and may convert the content conversion unit according to the UE environment of the subscriber to be delivered for each content requested from the media distribution server unit (MDS). The file conversion server unit (FCS) can search for the UE environment of the subscriber and extract information with JUICE to know the UE environment of the subscriber, and if the file conversion is necessary as a result of linkage with the subscriber information server (JUICE), the content You can convert and save files by linking the File Converter specified by the operator according to the specified method (pre / post). The file conversion server unit FCS optionally selects a file converter without the help of the subscriber information server unit JUICE and performs file conversion according to the UE environment of the corresponding subscriber. Here, in case it is impossible to determine the performance and model of the user terminal, the file conversion server unit (FCS) manages the model of the UE and the data format that can be processed by the UE, and converts the file according to the needs of the service The server unit (FCS) may perform a function of bypassing to another media conversion server without directly involved in data contents.

The foregoing drawings and detailed description of the invention are merely exemplary of the invention, which are used for the purpose of illustrating the invention only and are intended to limit the scope of the invention as defined in the claims or in the claims. It is not. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

As described above, the present invention can provide a method and apparatus for a ring back tone service for a group communication service including voice, data, and message using a push-to-talk (PTT) method. It works.

In addition, the present invention can provide a method and apparatus for providing a ring back tone service for a group communication service in which a PTT service is applied to an existing CDMA network.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art that various modifications of the present invention without departing from the spirit and scope of the invention described in the claims below And can be changed.

Claims (14)

A ring tone service method for a group communication service. (a) establishing a session between the calling terminal and the ring back tone server unit by requesting an incoming call from the PTT server unit corresponding to the calling terminal to the SIP server corresponding to the ring back tone server unit; (b) a media distribution server unit connected to the PTT server unit for updating a ring back tone channel of a PTT channel and a ring back tone channel previously reserved, and transmitting a charging start signal for the ring back tone to the PTT server unit; And (c) if the media distribution server unit grants a voice to the RBT distribution server, the RBT server unit transmitting a RBT to the calling terminal, In the step (c), the media distribution server transmits a floor grant message (Floor Grant) granting a talk right to the call back tone server and sends a floor take message (Floor Taken) indicating that the talk right is occupied to the calling terminal. The ring back tone service method comprising the step of transmitting. The method of claim 1, The ring back tone And a ring back tone corresponding to the calling terminal set by the caller and a ring back tone corresponding to the called terminal set by the called party. delete The method of claim 1, Requesting, by the PTT server unit, the destination information for the destination terminal from the group list management unit connected to the calling terminal that has transmitted the incoming request to the destination terminal; The media distribution server unit receives a reservation request for the PTT channel corresponding to the called terminal and the ring back tone channel corresponding to the ring back tone server from the PTT server unit, and then makes a reservation for the PTT channel and the ring back tone channel. Performing; RPE service method characterized in that the preceding. The method of claim 1, Requesting, by the PTT server unit, an update of a ring back tone channel to the media distribution server, ending the ring back tone providing; Requesting, by the PTT server unit, an update for the PTT channel to the media distribution server, and updating the channel in the media distribution server unit; The media distribution server unit notifies the PTT server unit of the start of charging for the PTT service, and grants a voice to the calling terminal, and the calling terminal transmits voice data to the called terminal. Ring back tone service method characterized in that the following. The method of claim 5, When the called terminal is in the manual mode, the PTT server unit continuously receives a ring signal from the called terminal while the call connection tone is provided. If the answering terminal answers the call, the PTT server unit recognizes this, and terminates the call connection tone. The method of claim 1 further comprising the step of requesting to the server. The method of claim 5, The media distribution server unit may further include: transmitting a floor grant message granting a floor right to the calling terminal and transmitting a floor right message indicating a floor right to the called terminal; Ring back tone service method, characterized in that. A ring back tone service apparatus for a group communication service. A PTT server unit for requesting an incoming call to a SIP server corresponding to the ring back tone server unit to establish a session between the calling terminal and the ring back tone server unit; A media distribution server unit connected to the PTT server unit to perform an update on a ring back tone channel of a PTT channel and a ring back tone channel previously reserved, and to transmit a charging start signal for the ring back tone to the PTT server unit; And And a ring back tone server unit for transmitting a ring back tone to the calling terminal when the media distribution server unit gives a talk right to the ring back tone distribution server. The method of claim 8, The ring back tone And a ring back tone corresponding to the calling terminal set by the caller and a ring back tone corresponding to the called terminal set by the called party. The method of claim 8, Characterized in that the media distribution server transmits a floor grant message (Floor Grant) granting a talk right to the call back tone server and a floor take message (Floor Taken) indicating that the talk right is occupied. Ring back tone service device. The method of claim 8, The PTT server unit connects with the originating terminal that has sent the incoming request to the called terminal, and requests and receives the incoming information about the called terminal from the group list manager. The media distribution server unit receives a reservation request for the PTT channel corresponding to the called terminal and the ring back tone channel corresponding to the ring back tone server from the PTT server unit, and then makes a reservation for the PTT channel and the ring back tone channel. Ring connection service device, characterized in that performed. The method of claim 8, The PTT server unit requests the media distribution server to update the ring back tone channel, terminates the provision of the ring back tone, and requests the media distribution server to update the PTT channel. Update the channel, the media distribution server unit notifies the PTT server unit of the start of charging for the PTT service, and grants a voice to the calling terminal, the calling terminal transmits voice data to the called terminal. Ring back tone service device. The method of claim 12, When the called terminal is in the manual mode, the PTT server unit continuously receives a ring signal from the called terminal while the call connection tone is provided. If the answering terminal answers the call, the PTT server unit recognizes this, and terminates the call connection tone. Ring back tone service device, characterized in that the request to the server. The method of claim 12, The media distribution server unit transmits a floor grant message (Floor Grant) granting a talk right to the calling terminal, and sends a floor taking message (Floor Taken) indicating that the talk right is occupied to the called terminal. Ring back tone service device.

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