KR100644387B1 - Method and apparatus for providing for voice mail service - Google Patents

Abstract

The present invention relates to a voice mail 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. A voice mail service method and apparatus are provided. According to a preferred embodiment, the voice mail service method for the group communication service includes: (a) a first SIP server unit corresponding to the originating terminal receives an incoming request signal from the originating terminal to the VMS server unit providing the voice mail service; Doing; (b) connecting the calling terminal to the PTT server unit in the first SIP server unit, the PTT server unit transmitting a reservation signal for a channel for voice mail to the media distribution server unit, and the media distribution server unit reserving the channel; (c) requesting an incoming call from the VMS server unit to the second SIP server unit corresponding to the VMS server unit to establish a session between the calling terminal and the VMS server unit; (d) requesting the PTT server unit to update the channel to the media distribution server, updating the channel at the media distribution server, and transmitting a charging start signal to the PTT server; (e) when the media distribution server unit gives a voice to the calling terminal, the VMS server unit receiving and storing the voice mail from the calling terminal; And (f) when the called terminal accesses the VMS server, transmitting the voice mail to the called terminal.

Group communication, voice, mail, billing, PTT, terminal, PTD

Description

Method and apparatus for voice mail service for group communication service {Method and apparatus for providing for voice mail service}             

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

1B is a diagram showing the configuration of a group communication network for a voice mail 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 voice mail server for a voice mail 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 voice mail service according to an exemplary embodiment of the present invention.

4 is a diagram illustrating a configuration of a group list management unit for a voice mail 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 voice mail service according to an exemplary embodiment of the present invention.

6 is a diagram illustrating a configuration of a SIP server unit for a voice mail service according to an exemplary embodiment of the present invention.

7 is a diagram illustrating a configuration of a PTT server unit for a voice mail service according to an exemplary embodiment of the present invention.

8 is a diagram illustrating a configuration of a load distributing unit for a voice mail service according to a preferred embodiment of the present invention.

9 is a diagram showing the configuration of a media distribution server unit for a voice mail service according to a preferred 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: VMS server unit

The present invention relates to a voice mail 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 voice mail 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 voice mail service method and apparatus.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and a voice mail service method and apparatus for a group communication service including voice, data, and message using a push-to-talk (PTT) method The purpose is to provide.

Another object of the present invention is to provide a voice mail service method and apparatus for each group communication service by integrating a PTT service to an existing CDMA network. Will be embodied.

According to an aspect of the present invention for achieving the above object, a voice mail 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 voice mail service method for the group communication service (a) the first SIP server unit corresponding to the originating terminal, the incoming request signal from the originating terminal to the VMS server unit providing a voice mail service Receiving; (b) When the originating terminal is connected to the PTT server unit by the first SIP server unit, the PTT server unit transmits a reservation signal for a channel for voice mail to the media distribution server unit, and the media distribution server unit reserves the channel. Doing; (c) the PTT server unit requesting an incoming call to the VMS server unit to a second SIP server unit corresponding to the VMS server unit to establish a session between the originating terminal and the VMS server unit; (d) the PTT server unit requesting the media distribution server unit to update the channel, updating the channel at the media distribution server unit, and transmitting a charging start signal to the PTT server unit; (e) if the media distribution server grants a voice to the calling terminal, the VMS server receiving and storing a voice mail from the calling terminal; And (f) when the called terminal accesses the VMS server, transmitting the voice mail to the called terminal.

The voice mail service method may include: connecting the originating terminal to the PTT server unit after receiving the incoming request for the called terminal from the calling terminal; The PTT server unit requesting and receiving the destination information for the destination terminal from the group list manager; Receiving, by the media distribution server unit, a channel reservation for establishing a session with the destination terminal from the PTT server unit, and then performing the channel reservation; The PTT server unit requesting an incoming call with the called terminal to a third SIP server corresponding to the called terminal; And after the third SIP server unit requests and receives the state information of the called terminal from a state management server, and transmits an incoming call unavailable message to the calling terminal when the state information is in a state that the incoming call cannot be connected. It may further include.

In the step (d), the media distribution server unit sends a floor taken message (Floor Taken) indicating that the right to speak is occupied to the VMS server, and sends a floor grant message (Floor Grant) to grant the right to speak to the calling terminal. Transmitting. Also, in the step (e), the media distribution server unit transmits a floor taken message (Floor Taken) indicating that the right to speak is occupied to the destination terminal, and a floor grant message (Floor Grant) granting the right to speak to the VMS server. Transmitting a step.

According to another aspect of the present invention for achieving the above object, a voice mail 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 voice mail service device distributes media when the voice mail service device connects to the calling terminal through a first SIP server that receives an incoming request signal from a calling terminal to a VMS server providing a voice mail service. Sends a reservation signal for a channel for voice mail to the server unit, requests a call from the VMS server unit to a second SIP server unit corresponding to the VMS server unit, and establishes a session between the calling terminal and the VMS server unit. The PTT server unit for; A media distribution server unit for reserving a channel for the voicemail and receiving an update request for the channel from the PTT server unit, updating the channel and transmitting a charging start signal to the PTT server unit; And when the media distribution server unit gives a voice to the originating terminal, the VMS server unit receives and stores a voice mail from the originating terminal, and then connects the voice mail to the terminating terminal when the terminating terminal accesses the VMS server. It may include the VMS server unit for transmitting to.

Here, when the first SIP server receives the incoming request for the called terminal from the calling terminal, the first SIP server connects the calling terminal to the PTT server, and the PTT server requests the group list manager for incoming information about the called terminal. After receiving, when the PTT server unit requests an incoming call with the called terminal to a third SIP server corresponding to the called terminal, the third SIP server part requests status information of the called terminal to a state management server. After the reception, if the state information is in a state where the incoming call cannot be connected, an incoming call impossible message is transmitted to the calling terminal. The media distribution server unit receives the channel reservation from the PTT server unit for session establishment with the called terminal and then performs the channel reservation.

In addition, the media distribution server unit transmits a floor taken message (Floor Taken) indicating that the right to speak is occupied to the VMS server, and transmits a floor right grant message (Floor Grant) granting the right to speak to the calling terminal. In addition, the media distribution server unit transmits a floor taken message (Floor Taken) indicating that the right to speak is occupied to the destination terminal, and transmits a floor right grant message (Floor Grant) granting the right to speak to the VMS server.

The VMS server unit may include: a PTT server unit configured to perform call control and session control on a group communication service including a PTT service and a PTD service using a call established with a terminal coupled through a packet data serving node; A media distribution server unit connected to the packet data serving node for transmitting bearer traffic corresponding to a PTT service and a PTD service to the terminal; And a talk right unit billing server unit for generating billing information in a talk right unit at a terminal corresponding to each talk right holder participating in a session corresponding to the PTT service and PTD service.

Hereinafter, the configuration of a voice mail 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 components 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 as 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 VMS (Voice Mail Service) server unit 1000 according to the present invention. The VMS server unit 1000 performs a function of providing a service for voice mail according to a PTT in association with a group communication service.

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 management unit (GLMS) 400. It performs the function. 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 interoperates with a billing CDR generation unit for generating a billing CDR (Call Detail Record) for the group communication service and a data service control server unit (hereinafter referred to as DSCP). It may include a prepaid billing processing unit for performing a real-time subtraction function for.

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, group communication 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 subscribers of group communication service, and performs the approval procedure 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) It is a server 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 explanation, a protocol stack structure is connected 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 based on one case.

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.

Voice mail server connection procedure

2A to 2B are flowcharts illustrating a method of accessing a voice mail server for a voice mail service according to an exemplary embodiment of the present invention. 2A is a flowchart illustrating a server access method, and FIG. 2B is a flowchart illustrating this in more detail. Hereinafter, a voice mail server access procedure according to the present invention will be described with reference to FIG. 2A, and a description of FIG. 2B will be omitted.

In step S201, when the user terminal 1 requests the call from the user terminal 2, the user terminal 1 is connected to the PTT server unit via the SIP server unit 1. In step S203, when the PTT server unit requests the state management server to change the state information of the user terminal 1, the state management server unit changes the state of the user terminal 1 to the outgoing state. In step S205, the PTT server unit accesses the group list management unit to extract incoming information of user terminal 2, which is the destination terminal. In step S207, if the media distribution server requests channel reservation for PTT using the incoming information of user terminal 2, the media distribution server performs PTT channel reservation.

In step S209, the PTT server unit requests an incoming call to the SIP server unit 2 corresponding to the user terminal 2. In step S211, the SIP server unit 2 requests and receives the state information of the user terminal 2 from the state management server. In this case, when the user terminal 2 cannot perform an incoming call or is set to be connected to a voice mail service or the like, in step S213, the SIP server unit 1 transmits a signal indicating that the incoming call cannot be connected to the user terminal 1.

In step S215, the user terminal 1 transmits an incoming request signal to the VMS server unit via the SIP server unit 1 to the PTT server unit. In step S217, the PTT server unit transmits a channel reservation signal for voice mail to the media distribution server unit. The media distribution server unit reserves a channel.

In step S219, the PTT server unit requests an incoming call for establishing a session with the VMS server unit to the SIP server unit 3, and establishes a session with the VMS server unit. In step S221, the media distribution server unit is reserved for voice mail. The channel is requested to be updated by the media distribution server unit.

In step S223, the media distribution server unit notifies the start of billing, and in step S225, transmits a floor occupancy message (Floor Taken) indicating that the floor is occupied to the VMS server, and in step S227, gives a floor right to the user terminal 1 Send a floor grant message (Floor Grant).

Thereafter, the voice data transmitted from the user terminal 1 is transmitted to the VMS server and stored. After receiving a message indicating that there is a voice mail, the user terminal 2 may access the VMS server and transmit the voice data. Herein, the process of accessing the VMS and receiving a voice mail is similar to the above process, but the media distribution server unit transmits a floor occupancy message (Floor Taken) to the user terminal 2 indicating that the floor is occupied. And a floor grant message (Gloor Grant) for granting a talk right to the server.

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 voice mail service to 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 a voice call service between a plurality of users through the control of the voice. 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 constituent members 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 corresponding 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 "Reject list" and "Aaccept list", and when the subscriber is registered, the group list management unit (GLMS) can transmit the access list information to the subscriber, and when the subscriber's access list change request, the access list in real time 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 MagicNen server for the buddy / group information change and the buddy approval procedure of the subscriber. .

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 inquiring the subscriber's IP address, the result of the inability 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, to use the upper two 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 configured.

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 time (timer), the session end part 713 for terminating the call session, and the subscriber who participated in the call session can 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. When 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. The status information may be changed by being reported to the group list manager GLMS at this time.

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 of releasing a PTD session may implement a PTD session releasing method for a PTT talk group member and a PTD session releasing method for a PTT talk group and other members, respectively. .

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 that has received a call completion (200 OK) response from the called party in the case of group transmission, and then billing server unit ( MAS).

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 be configured to recognize withdrawal of a call session of a specific member among participating members, and to 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 a media session 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 by the 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, the file according to the needs of the service The conversion 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 voice mail service method and apparatus 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 voice mail service method and apparatus 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 (10)

A voice mail service method for a group communication service. (a) receiving a call request signal from the originating terminal to a VMS server unit providing a voice mail service from the originating terminal; (b) When the originating terminal is connected to the PTT server unit by the first SIP server unit, the PTT server unit transmits a reservation signal for a channel for voice mail to the media distribution server unit, and the media distribution server unit reserves the channel. Doing; (c) the PTT server unit requesting an incoming call to the VMS server unit to a second SIP server unit corresponding to the VMS server unit to establish a session between the originating terminal and the VMS server unit; (d) the PTT server unit requesting the media distribution server unit to update the channel, updating the channel at the media distribution server unit, and transmitting a charging start signal to the PTT server unit; (e) if the media distribution server grants a voice to the calling terminal, the VMS server receiving and storing a voice mail from the calling terminal; And (f) the VMS server unit transmitting the voice mail to the destination terminal when the destination terminal accesses the VMS server; Voice mail service method comprising a. The method of claim 1, Connecting the originating terminal to the PTT server unit by the first SIP server unit receiving an incoming request for the called terminal from the calling terminal; The PTT server unit requesting and receiving the destination information for the destination terminal from the group list manager; Receiving, by the media distribution server unit, a channel reservation for establishing a session with the destination terminal from the PTT server unit, and then performing the channel reservation; The PTT server unit requesting an incoming call with the called terminal to a third SIP server corresponding to the called terminal; And Transmitting, by the third SIP server unit, an incoming call unavailable message to the calling terminal when the state information is in a state that the incoming call cannot be connected after receiving and receiving state information of the called terminal from the state management server; Voice mail service method characterized in that the preceding. The method of claim 1, Step (d) The media distribution server unit transmits a floor take message (Floor Taken) indicating that the right to speak is occupied to the VMS server, and transmits a floor grant message (Floor Grant) granting the right to speak to the calling terminal; A voice mail service method characterized by the above-mentioned. The method of claim 1, Step (e) is And transmitting, by the media distribution server, a floor taken message (Floor Taken) indicating that the floor is occupied, to the destination terminal, and a floor grant message (Floor Grant) granting the floor right to the VMS server. A voice mail service method characterized by the above-mentioned. A voice mail service apparatus for a group communication service. When a connection is made with the originating terminal via the first SIP server that receives the incoming request signal from the originating terminal to the VMS server portion providing the voice mail service, the media distribution server transmits a reservation signal for the channel for the voice mail. The PTT server unit for requesting an incoming call to the VMS server unit to a second SIP server unit corresponding to the VMS server unit to establish a session between the calling terminal and the VMS server unit; A media distribution server unit for reserving a channel for the voicemail and receiving an update request for the channel from the PTT server unit, updating the channel and transmitting a charging start signal to the PTT server unit; And When the media distribution server unit gives a voice to the calling terminal, the VMS server unit receives and stores a voice mail from the calling terminal, and when the called terminal accesses the VMS server, the voice mail is sent to the called terminal. The VMS server unit for transmission Voice mail service device comprising a. The method of claim 5, When the first SIP server unit receives the incoming request for the called terminal from the calling terminal, the first SIP server connects the calling terminal to the PTT server, and the PTT server unit requests the receiving information for the called terminal to the group list manager. After that, when the PTT server unit requests an incoming call with the called terminal to the third SIP server corresponding to the called terminal, the third SIP server part requests the state information of the called terminal from the state management server and receives the received information. After that, if the state information is in the state that the incoming call can not be connected, the voice mail service device, characterized in that for transmitting the incoming connection unavailable message to the calling terminal. The method of claim 6, The media distribution server unit receives the channel reservation for establishing a session with the called terminal from the PTT server unit, and performs the channel reservation. The method of claim 5, The media distribution server unit transmits a floor take message (Floor Taken) indicating that the right to speak is occupied to the VMS server, and transmits a floor grant message (Floor Grant) granting the right to speak to the calling terminal. Mail service device. The method of claim 5, The media distribution server unit transmits a floor take message (Floor Taken) indicating that the right to speak is occupied to the destination terminal, and transmits a floor grant message (Floor Grant) granting the right to speak to the VMS server. Mail service device. The method of claim 5, The VMS server unit A PTT server unit performing call control and session control for a group communication service including a PTT service and a PTD service using a call established with a terminal coupled through a packet data serving node; A media distribution server unit connected to the packet data serving node for transmitting bearer traffic corresponding to a PTT service and a PTD service to the terminal; And Coupled with the media distribution server unit, it is coupled with a floor unit billing server unit for generating the billing information in the unit of speech rights to the terminal corresponding to each speaker in the session corresponding to the PTT service and PTD service. Voice mail service device.

Images