KR100578365B1 - Method and apparatus for inviting offline subscriber for group communications service - Google Patents

Abstract

The present invention relates to a method and apparatus for inviting an offline subscriber for a group communication service, and more particularly, to a group communication service including voice, data, and message using a push-to-talk (PTT) method. A method and apparatus for inviting offline subscribers to provide a. The offline subscriber invitation method according to the preferred embodiment (a) is connected to the SIP server unit, SIP server unit for performing call setup with the terminal coupled through the packet data serving node, and interworking according to the binary protocol with the terminal, A group list management unit for managing group list information corresponding to the terminal, a status management server unit and a SIP server unit for maintaining subscriber status information corresponding to the terminal during a logout period after the terminal logs in to the group list management unit; Authenticating a user terminal connected to a group communication network including a PTT server unit for performing call control and session control for a group communication service including a PTT service and a PTD service by using a call set by the mobile terminal; (b) requesting, from the PTT server unit, an invitation message transmission request signal including terminal information of an offline subscriber corresponding to the user terminal to a message server included in the group communication network; (c) transmitting an invitation message from the message server unit to the terminal of the offline subscriber so that the group communication network can be accessed using callback information included in the invitation message received at the destination terminal corresponding to the offline member; And (d) generating the transmission result message of the invitation message and transmitting the generated message to the PTT server unit.

Group Communications, Text Messages, Offline, Subscribers, Invites

Description

Method and apparatus for inviting offline subscribers for group communication service             

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

1B is a diagram showing the configuration of a group communication network 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 2D illustrate an offline subscriber invitation method according to a preferred embodiment of the present invention;

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

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

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

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

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

4 is a diagram showing the configuration of a group list manager according to a preferred embodiment of the present invention.

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

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

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

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

9 is a diagram showing the configuration of a media distribution server unit according to a preferred embodiment of the present invention.

10 is a diagram showing the configuration of a charging information providing unit according to a preferred embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: user terminal

310: node management server (MOMP)

400: group list management unit

500: state management server unit

600: SIP server unit

700: PTT server unit

800: load distribution unit

850: message server unit

900: media distribution server unit

The present invention relates to a method and apparatus for inviting an offline subscriber for a group communication service, and more particularly, to a group communication service including voice, data, and message using a push-to-talk (PTT) method. A method and apparatus for inviting offline subscribers to provide a. Here, PTT (Push To Talk) refers to an instant communication service that can provide a relatively very fast communication service as 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, even if a subscriber subscribes to such a PTT service, there is a problem in that a PTT service cannot be provided unless the subscriber is connected to the service, that is, if the subscriber does not actively subscribe to the PTT service, the caller is connected with the subscriber. There is a problem that group communication cannot be performed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and invites offline subscribers to provide group communication services including voice, data, and messages using a push-to-talk (PTT) method. To provide a method and apparatus for.

The present invention also provides a method and apparatus for performing communication communication with an offline subscriber by inducing a connection to a group communication service to an offline subscriber among subscribers who have subscribed to the PTT service. Will be more specific in the Examples.

According to an aspect of the present invention for achieving the above object, by using a push-to-talk (PTT) method to provide offline subscribers to provide a group communication service including voice, data, messages, etc. A method for inviting can be disclosed.

According to a preferred embodiment, the offline subscriber invitation method includes (a) a SIP server unit for performing call setup with a terminal coupled through a packet data serving node and interworking with the terminal according to a binary protocol, and the SIP server A group list manager for managing group list information corresponding to the terminal, and maintaining the subscriber status information corresponding to the terminal during a logout period after the terminal logs in to the group list manager; A user terminal connected to a group communication network including a state management server unit and 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 set by the SIP server unit. Authenticating; (b) in the PTT server unit, requesting an invitation message transmission request signal including terminal information of an offline subscriber corresponding to the user terminal to a message server included in the group communication network; (c) transmitting an invitation message from the message server unit to the terminal of the offline subscriber so that the group communication network can be accessed using callback information included in the invitation message received at the destination terminal corresponding to the offline member; And (d) generating the transmission result message of the invitation message and transmitting the generated message to the PTT server unit.

The group for providing the group communication service may include a default group corresponding to the terminal and designated as a default; A predetermined group previously designated by the terminal and having a fixed member; A chat group previously designated by the terminal but not having a fixed member; And an ad hoc group for performing group communication with a member designated by the terminal in real time, and the group managed by the group list manager may be the default group, the predetermined group, and the chat group.

In the step (a), when the SIP server unit receives a registration request message including first authentication information from the user terminal, the first authentication information included in the registration request message is extracted, and then the extracted first authentication is performed. Requesting first authentication to the group list manager using information; The group list manager performing the first authentication requests the second authentication to the location management server by using the second authentication information, and the location management server part performing the second authentication sends an authentication result to the group list manager. Transmitting to the SIP server; And when the first authentication and the second authentication succeed, the SIP server unit may notify the status management server unit and the user terminal of the authentication success information.

The step (b) may include requesting status information of a group member from the user terminal in the status management server unit, and requesting group member information to the group list manager to extract status information; Extracting, by the group list manager, group member information corresponding to the user terminal, and transmitting the group member information to the state management server unit; Extracting state information corresponding to the group member information, and transmitting the state information to the PTT server unit; Extracting, by the PTT server unit, terminal information of a subscriber who is offline using the state information; And generating an invitation message transmission request signal including the terminal information.

The PTT server unit may further include receiving a request for a group communication service for a predetermined group from the user terminal; And providing a group communication service to an online subscriber among members of the group, and transmitting the invitation message to an offline subscriber. The message server unit may further include transmitting a status report message to the PTT server unit and receiving a status result message from the PTT server unit that receives the status report message.

According to another aspect of the present invention for achieving the above object, by using a push-to-talk (PTT) method to provide offline subscribers to provide a group communication service including voice, data, messages, etc. An apparatus for inviting can be disclosed.

According to a preferred embodiment, the offline subscriber invitation apparatus (a) SIP server unit for performing call setup with the terminal coupled through the packet data serving node, and interworking according to the binary protocol with the terminal, the SIP server A group list manager for managing group list information corresponding to the terminal, and maintaining the subscriber status information corresponding to the terminal during a logout period after the terminal logs in to the group list manager; A user connected to a group communication network including a PTT server unit for performing call control and session control for a group communication service including a PTT service and a PTD service using a state management server unit and a call set by the SIP server unit. Means for authenticating a terminal; (b) means for requesting, from the PTT server unit, an invitation message transmission request signal including terminal information of an offline subscriber corresponding to the user terminal to a message server included in the group communication network; (c) means for transmitting an invitation message from the message server unit to the terminal of the offline subscriber so that the group communication network can be accessed using callback information included in the invitation message received at the destination terminal corresponding to the offline member; And (d) means for generating a transmission result message of the invitation message and transmitting the generated message to the PTT server unit.

Hereinafter, the configuration of an offline subscriber invitation 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, in FIG. 1A, a connection relationship with an existing communication network according to a preferred embodiment of the present invention will be described, and in FIG. 1B, a configuration of a group communication network for inviting offline subscribers will be described. 1C and 1D will be described a protocol stack structure according to a preferred embodiment of the present invention.

1A is a diagram illustrating a connection relationship with an existing 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 Network Interworking Unit (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, ...).

When the PTT server unit receives a request for a group communication service for a predetermined group from the user terminal, the PTT server unit provides a group communication service to an online subscriber among members of the group, and transmits the invitation message to an offline subscriber. Is set to

In this case, since the invitation message transmission may be charged, a condition for whether or not to send the invitation message may be set, and when the group communication is requested, the invitation message may be automatically transmitted to the offline subscribers. It can also be set to transmit.

FIG. 1B is a diagram illustrating the configuration of a group communication network for inviting offline subscribers according to a preferred embodiment of the present invention.

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 message server unit 850, a media distribution server unit 900, and a node management server (MOMP) 310 may be included.

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 ignaling Compression (sigcomp) functions, and performs interworking with the terminal and Binary Protocol for PTT call setup. The PTT server unit (PTTS, Push-To-Talk Server) 700 is responsible for call control and session control for PTT / PTD, generates charging CDR for MGCS service, and works in conjunction with DCSP to provide real-time information on intelligent network subscribers. A server that performs a subtraction function.

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 message server 850 may perform a function of transmitting an invitation message for group communication to a terminal corresponding to an offline subscriber among groups in which the user requests group communication from the terminal. That is, the message server unit 850 according to the present invention is a system for providing a short message to a subscriber and a system and performing a charging function thereof. Although not shown in the figure, the message server unit 850 may be combined via a PTT server unit, an IP backbone network and a routing unit. Here, the routing unit refers to an apparatus for connecting the client devices interworking with the message server unit with the message server unit according to a preset format (for example, SMCI, etc.).

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) This system manages the location and status of 1x and 1xEV DO subscribers and interworks with DNS and SCMM when it receives AT Activation request of LMSC and performs AT activation. Packet Data Serving Node (PDSN) KTF HPDN is in charge of R P Interface with PCF, PPP Interface with Terminal, and Mobile IP Interface with Home Agent. 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 group communication service 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. 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 control of a 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-based instant 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-based 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, wherein 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).

In addition, the present invention may 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 general subscribers, one of the predesignated groups managed by the subscriber can 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. A member wishing 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.

Offline Subscriber Invitation Process

According to the present invention, an invitation message is transmitted to a user terminal that is not connected to a group communication network, that is, an offline subscriber to the group communication network, and then the offline subscriber who allows the access message can be connected to the group communication network.

Here, the protocol stack between the PTT server unit serving as a client and the message server unit is as follows. That is, the interworking protocol between the client (PTTS) and the server (SMSC) is divided into a header part and a data part, the header part is commonly used for all messages, and the data part may be configured differently according to each message characteristic. According to a preferred embodiment, the header part may include a length information field, a correlation information field (Correlation Number), a message type field, an operation type field, and the like. In this case, the length information field indicates the total length of the data part, and the correlation information field indicates a correlation for the result message (Acknowledge or Error) that is a response to the request message. Created at the node. The operation type field is a field indicating an operation type and a corresponding value is assigned according to the operation type used in the present invention. Hereinafter, a procedure of providing a group communication service according to the present invention will be described with reference to FIGS. 2A to 2D.

2A is a diagram illustrating an access procedure for inviting offline subscribers according to a preferred embodiment of the present invention.

Hereinafter, the offline subscriber invitation procedure will be described based on the case where the short message service center is a message server unit, but is not limited to the short message service center, and may include a server capable of transmitting other messages. Of course. In accordance with the present invention, a client wishing to establish an application layer connection using TCP / IP initiates a connection to a message server. Here, SMSC acts as a message server and PTTS acts as a client. According to an embodiment of the present invention, a client may perform a multi-connection to the same server and perform load balancing on the multi-connection. The message server is configured to distinguish a client by a client name and a password pair, and the client is configured to enable application of station data settings. Hereinafter, a description will be given based on the case where the client is a PTT server unit.

Referring to FIG. 2A, an application layer connection of a message server and a PTT server unit may be connected through the following procedure. First, in step S211, the message server delivers a banner message to the PTT server unit. In step S213, the PTT server unit generates a connection invoke message (bind invoke) message including application layer registration information and transmits the message to the message server. In step S215, the message server is configured to deliver the connection result message including the connection result information and node parameters to be used in the PTT server unit to the PTT server unit.

The connection request message according to the present invention may include a PTT server unit name, a password, password check information, and the like. Here, the PTT server unit name is a String value of 15 bytes representing the client's name, and the message server unit can identify the client using the field. The password is a field referred to by the message server to form a binding with the PTT server, and is assigned by the message server. The password check information is generated by the PTT server unit generating the connection request message, and is an integer value that determines whether the message server checks the password.

The connection result message may include result information, country code, network code, directory information, access information, and the like. Here, if the result information is a connection failure, it is configured to ignore the country code, network code, directory information, access information.

2B is a diagram illustrating a system parameter update procedure according to a preferred embodiment of the present invention.

Referring to FIG. 2B, in step S221, when its system setting parameter is changed, the message server generates a system parameter update message in real time and transmits the message to the PTT server unit. Thereafter, the PTT server unit may communicate with the message server using the changed system setting parameter.

The system updater parameter according to the present invention may include valid period information and transmission count information. Here, the validity period information is a value representing the validity period for the offline subscriber invitation message that has not been transmitted. The transmission count information indicates a number of attempts to transmit an offline subscriber invitation message.

2C is a diagram illustrating an offline subscriber invitation message transmission procedure according to a preferred embodiment of the present invention. Hereinafter, referring to FIG. 2C, the PTT server unit may request a message transmission to the message server unit to transmit the invitation message to the user terminal.

In step S231, the PTT server unit transmits, to the message server unit, an invitation message transmission request (Submit Invoke) indicating the connection to the group communication network requesting transmission of the invitation message to the user terminal. The invitation message may include callback information, and the callback information may include callback address information and field information indicating whether the callback address information is included. In addition, the invitation message may include a subscription invitation text, a status report identifier, billing request information, and the like. Here, the subscription invitation text indicates an invitation message displayed on the user terminal, and the status report identifier is one byte for indicating an event indicating a reason of a status report message transmitted from the message server unit to the PTT server unit. The integer values are summarized in Table 3 below. Here, each bit represents a different event, and if a specific bit is set to '1', the message server unit is configured to transmit the status information to the PTT server unit when the state of the user terminal is processed. Any combination of bits corresponding to the identifier can be set.

Value Ser bit Contents 0x00 - no status is required 0x01 0 Unable to deliver message, delivery abandoned 0x02 One Message expired 0x04 2 Message delivered 0x08 3 Message deleted 0x10 4 Unable to deliver message. retrying delivery

In addition, the charge request information (Charge Indicator) refers to the identification information for the object charging the offline subscriber invitation message. According to a preferred embodiment, it can be set to one of the values provided in Table 4 below.

Vlaue Contents One Not charged 2 Charge the sender who requested to send a message 3 Charge the recipient who received the message

After receiving the transmitted message, and in step S233, the message server unit transmits the subscriber invitation message to the user terminal. In step S235, the message server performs an error check and transmits a transmission result message for the error check result to the PTT server. The transmission result message according to the present invention may include a transmission identification message including message server identification information, transmission request message identification information, a message key, and the like, and a transmission error message including failure information and error text indicating a reason for transmission failure. Here, the message key is used for identifying an internal message, and generated by the message server unit and transmitted to the PTT server unit.

In step S237, the message server unit transmits a status report invoke requesting status information to the PTT server unit for requesting transmission of the subscriber invitation message or the like. Here, the status report message may include information about the number of user terminals waiting to be transmitted in correspondence with each PTT server, transmission time, generation time of status report message, final message transmission time, message status information, and the like.

In step S239, a status result message including an error check, reception result information, and the like of the message received is transmitted to the message server unit. The status result message is a message indicating the response information on the reception result of the status report message, the PTT server unit may include a status report recognition message and status report error message.

2d is a diagram illustrating a disconnection procedure of an offline subscriber invitation according to a preferred embodiment of the present invention. After the offline subscriber invitation message is transmitted through the above-described procedure, the message server unit is disconnected from the PTT server unit.

Referring to FIG. 2D, a connection release message may be transmitted to release a connection between the PTT server unit and the message server unit. Here, the connection release message may be generated and transmitted by the message server unit in step S241 as shown in FIG. 2D (a), or may be generated and transmitted by the PTT server unit in step S243 as shown in FIG. 2D (b). There is also. Here, the release connection message may include a field indicating a reason for the release of the message.

Procedure for providing login and status information

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 state management server unit PS notifies the user terminal of the member for the group via the SIP server unit SIPS. (NOTIFY)

Here, when there are a plurality of groups, 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, when there are a plurality of groups, it is configured to repeat 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) for each group. do.

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)

If the user terminal 1 sets the release time to a specific time (T) and the user member 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 subscriber's Host ID, Hexa ID, screen name, Answer mode, and DND (Do not disturb). 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 a request for information on the called subscriber of the PTT server unit (PTTS) for the caller's invitation is required. 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 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 the status query 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. It may include an IPLS interworking unit 533 for interworking with the IPLS periodically to update the status information of the subscriber, where the status information when the interworking result by the IPLS interworking unit 533 is 'AT member' Can be updated to '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 a called IP address query function to the PS in order to transmit a SIP message to the called subscriber, and may provide a detection function and a loose routing function for a looped request. 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 querying the subscriber 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 in accordance with 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 the "SDB Indicator" field is used, the upper 2 bits of the TOS field of the load distribution unit LD of the IP header field are used, or the load distribution unit LD of the IP header field. ) Can be configured to use the Option field.

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 750, and a prepaid payment. It may include a billing processing unit 760, 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 call request for a default, chat, pre-define and 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. . The call controller 710 may request media resource allocation for the call to the media distribution server unit (MDS) to allocate media resources. 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 the PTD session may be implemented in the PTD session release for the PTT talkgroup member and the PTD session release method for the PTT talkgroup and the other members, respectively, and may be simultaneously performed with the PTT service.

The billing CDR generation unit 750 performs a billing CDR generation function for the 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 the 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 750 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 unit 760 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 760 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 part

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 a preferred embodiment of the present invention may include a media session controller 910, a media distributor 920, a voice control unit 930, and billing. The information transmitter 940, the 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 entered into the media distribution server unit (MDS) is converted and distributed according to the needs of the subscriber terminal environment by interworking 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 billing information transmitter 940 performs a function of generating billing information in units of the floor of the talker who participated 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. The billing information transmitter 940 may generate session billing information at the end of the PTT session. The billing information of the session 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.

Configuration of billing server section and other additional server sections

10 is a diagram showing the configuration of a charging information providing unit according to a preferred embodiment of the present invention.

Referring to FIG. 10, the billing information provider (MAS, MGCS Accounting Server) 1000 according to the present invention may include a billing information collector 1010, a billing information transmitter 1020, and an interlocking unit 130. have.

The charging information collection unit 1010 performs a charging CDR collection function. According to a preferred embodiment, for the PTT service, the MAS is configured to collect the billing CDRs from the PTT server unit (PTTS) at the end of every talk, and for the PTD service, the MAS is configured for the PTT server unit at the end of every file transfer. Collecting CDRs from PTTS). In addition, for the IM service, the MAS collects the charging CDRs from the PTT server unit (PTTS) at the completion of every IM message transmission, and the collected service-specific charging CDRs are configured to be stored / managed on a disk.

The billing information transmitter 1020 may perform a function of transmitting a billing CDR file. The MAS can make the collected charging CDR into a file according to a certain condition (number of collected CDRs, file size) and send it to the subscriber management server unit (WISE), and at the scheduled time, the file list file for the charging CDR file is promised. Must be sent to WISE.

The interlocking unit 1030 is a PTTS interlocking unit 1030 and a billing CDR file and a billing CDR file list for collecting a billing CDR in conjunction with a PTT server unit (PTTS) at a call processing intermediate or end point of a PTT / PTD / IM service. The WISE linkage unit 1033 for interworking with the subscriber management server unit (WISE) for file transfer may be included.

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 provides a method and apparatus for inviting offline subscribers to provide a group communication service including voice, data, and message using a push-to-talk (PTT) scheme. There is an effect that can provide.

In addition, the present invention also has an effect that can communicate with the offline subscriber by inducing a connection to the group communication service to the offline subscriber among the subscribers subscribed to the PTT service.

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 (12)

An offline subscriber invitation method for a group communication service. (a) a SIP server unit for performing call setup with a terminal coupled through a packet data serving node and interworking with the terminal according to a binary protocol, and connected to the SIP server unit, and group list information corresponding to the terminal; A group list management unit for managing a group, a state management server unit for maintaining subscriber status information corresponding to the terminal during the logout period after the terminal logs in to the group list management unit and is set by the SIP server unit Authenticating a user terminal connected to a group communication network including a PTT server unit for performing call control and session control for a group communication service including a PTT service and a PTD service using a call; (b) in the PTT server unit, requesting an invitation message transmission request signal including terminal information of an offline subscriber corresponding to the user terminal to a message server included in the group communication network; (c) transmitting an invitation message from the message server unit to the terminal of the offline subscriber so that the destination terminal corresponding to the offline member can access a group communication network using callback information included in the received invitation message; And (d) generating a transmission result message of the invitation message and transmitting the generated message to the PTT server unit; Offline subscriber invitation method comprising a. The method of claim 1, The group for providing the group communication service A default group corresponding to the terminal and predefined by default; A predetermined group previously designated by the terminal and having a fixed member; A chat group previously designated by the terminal but not having a fixed member; And An ad hoc group for performing group communication with a member designated by the terminal in real time; And a group managed by the group list manager is the default group, the predetermined group, and the chat group. The method of claim 1, Step (a) is When the SIP server unit receives a registration request message including primary authentication information from the user terminal, extracts the primary authentication information included in the registration request message and then uses the extracted primary authentication information to list the group. Requesting primary authentication to the management unit; The group list manager performing the first authentication requests the second authentication to the location management server by using the second authentication information, and the location management server part performing the second authentication sends an authentication result to the group list manager. Transmitting to the SIP server; And When the first authentication and the second authentication are successful, notifying the status management server unit and the user terminal of the authentication success information by the SIP server unit; Offline subscriber invitation method comprising a. The method of claim 1, Step (b) is Receiving status information of a group member from the user terminal in the status management server unit, and requesting group member information to the group list manager to extract status information; Extracting, by the group list manager, group member information corresponding to the user terminal, and transmitting the group member information to the state management server unit; Extracting state information corresponding to the group member information, and transmitting the state information to the PTT server unit; Extracting, by the PTT server unit, terminal information of a subscriber who is offline using the state information; And Generating an invitation message transmission request signal including the terminal information; Offline subscriber invitation method comprising a. The method of claim 1, The PTT server unit receiving a request for a group communication service for a predetermined group from the user terminal; And Providing a group communication service to an online subscriber among members of the group and transmitting the invitation message to an offline subscriber; Offline subscriber invitation method further comprises. The method of claim 1, The message server unit transmitting a status report message to the PTT server unit and receiving a status result message from the PTT server unit which has received the status report message; Offline subscriber invitation method further comprises. An offline subscriber invitation apparatus for a group communication service. (a) a SIP server unit for performing call setup with a terminal coupled through a packet data serving node and interworking with the terminal according to a binary protocol, and connected to the SIP server unit, and group list information corresponding to the terminal; A group list management unit for managing a group, a state management server unit for maintaining subscriber status information corresponding to the terminal during the logout period after the terminal logs in to the group list management unit and is set by the SIP server unit Means for authenticating a user terminal connected to a group communication network including a PTT server unit for performing call control and session control for a group communication service including a PTT service and a PTD service using a call; (b) means for requesting, from the PTT server unit, an invitation message transmission request signal including terminal information of an offline subscriber corresponding to the user terminal to a message server included in the group communication network; (c) means for transmitting an invitation message from the message server unit to the terminal of the offline subscriber so that the group communication network can be accessed using callback information included in the invitation message received at the destination terminal corresponding to the offline member; And (d) means for generating a transmission result message of the invitation message and transmitting it to the PTT server unit; Offline subscriber invitation device comprising a. The method of claim 7, wherein The group for providing the group communication service A default group corresponding to the terminal and predefined by default; A predetermined group previously designated by the terminal and having a fixed member; A chat group previously designated by the terminal but not having a fixed member; And An ad hoc group for performing group communication with a member designated by the terminal in real time; And a group managed by the group list manager is the default group, the predetermined group, and the chat group. The method of claim 7, wherein When the SIP server unit receives a registration request message including primary authentication information from the user terminal, extracts the primary authentication information included in the registration request message and then uses the extracted primary authentication information to list the group. Request the first certification to the management department, After performing the first authentication, the group list manager requests the second authentication to the location management server using the second authentication information. And the location management server unit transmits an authentication result to the group list manager and the SIP server after performing the second authentication. The method of claim 7, wherein The state management server unit receives the state information of the group member from the user terminal, and when the group list information is requested to the group list manager to extract state information, the group list manager extracts the group member information corresponding to the user terminal. After receiving the group member information from the terminal, extracting the state information corresponding to the group member information, and transmitting the extracted state information to the PTT server unit, And the PTT server unit extracts terminal information of a subscriber who is in an offline state by using the status information, and generates an invitation message transmission request signal including the terminal information. The method of claim 7, wherein When the PTT server unit receives a request for a group communication service for a predetermined group from the user terminal, the PTT server unit provides a group communication service to an online subscriber among members of the group, and transmits the invitation message to an offline subscriber. An offline subscriber invitation device. The method of claim 7, wherein And the message server unit transmits a status report message to the PTT server unit and receives a status result message from the PTT server unit which has received the status report message.

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