KR100437530B1 - Apparatus and method for conference call service providing in ALL IP mobile communication network - Google Patents

Abstract

The present invention relates to an apparatus and method for providing a conference call service in an ALL IP mobile communication network to provide a conference call service in a network for transmitting packetized data based on IP.

In the conventional ALL IP mobile communication network, as the control and the transmission are separated, the function of the switch is divided into the control part and the transmission part, and the multi-call part that provides the multi-party call service is also provided as a separate independent device. There is a need for a way to connect channels.

The present invention can provide a multi-party call service in an ALL IP mobile communication network by connecting a terminal to perform a multi-party call in a WCA performing a call control function to a VFS providing a multi-call function.

Description

Apparatus and method for conference call service providing in ALL IP mobile communication network

The present invention relates to an apparatus and method for providing a multi-party call service in an ALL IP mobile communication network. In particular, the present invention relates to a multi-party call service in an ALL IP mobile communication network that can provide a multi-party call service in a network for transmitting packetized data based on IP. An apparatus and method for providing a call service are provided.

As shown in FIG. 1, a multi-party call service in a conventional mobile communication network includes a mobile subscriber processor 13, a switch controller 15, a relay subscriber processor 17, a multi-call mixer 19, and the like. Provided by the interaction, when the mobile communication subscriber attempts to make a call, the mobile subscriber processing unit 13 recognizes that the call has originated, translates the called party number, and then performs routing processing to perform the routing process, if the destination subscriber is a domestic subscriber. In conjunction with the processing unit 13, under the control of the switch control unit 15, the path is connected by a two-way call between the called party and the calling party. On the other hand, if the called subscriber is another station subscriber, in conjunction with the relay subscriber processing unit 17, the path is connected by a two-way call between the called subscriber and the calling subscriber under the control of the switch controller 15.

As described above, when the calling subscriber attempts the multi-party call service while the call is connected between the two subscribers, the exchange asks the home location register (HLR) 20 whether the subscriber can receive the multi-party call service. .

In the case of the result of the inquiry received from the HLR 20, when the calling subscriber is a subscriber who can receive the multi-party call service, after receiving the called number from the calling subscriber and performing number translation, the multi-calling unit 19 performs routing processing. The first two subscribers and the new subscriber are requested to be connected, and three subscribers are connected to the multiple call unit 19 under the control of the switch controller 15. The multi call unit 19 synthesizes the voice data input from the three subscribers and outputs them to the three subscribers, and each subscriber listens to the mixed voices output through the switch control unit 15 and the mobile subscriber processor 13. You will receive a multi-party call service.

As described above, when the calling subscriber attempts the multi-party call service while the call is connected between the three subscribers, the exchange receives the called party number from the calling subscriber, performs number translation, and then performs routing processing to perform the multi-call unit 19. In this case, three subscribers and a new subscriber are connected, and four subscribers are connected to the multiple call unit 19 under the control of the switch controller 15.

As described above, in the conventional mobile communication network, in order to provide a multi-party call service to a subscriber, a device called a multi-call unit 19 is provided in an exchange, and a call between subscribers is connected to the multi-call unit 19 to provide voice of each subscriber. The multi-party call service provided to mobile subscribers is performed according to different control methods using hardware and software developed by the exchange manufacturer.

On the other hand, in the ALL IP mobile communication network, which is a 4th generation mobile communication network for integrating mobile communication network and Internet network to provide broadband multimedia services including voice, video, and Internet services at a low price, as the control and transmission are separated, the function of the exchange is changed. The multiple call unit 19, which is divided into a control unit and a transmission unit and provides a multi-party call service, is also provided as a separate device. And, the control method between all the network equipment is not a closed control method of the existing network but is controlled in accordance with an open and standardized protocol. Therefore, in the ALL IP mobile communication network in which the multiple call unit 19 is separated into separate equipment and controlled according to a standardized protocol, a method for connecting a call path between the multiple call unit 19 and the mobile subscriber is required. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described needs, and by connecting terminals wishing to carry out a multi-party call in a WCA performing a call control function to a VFS providing a multi-call function, a multi-party call service is provided in an ALL IP mobile communication network. An object of the present invention is to provide an apparatus and method for providing a multi-party call service in an ALL IP mobile communication network.

1 is a diagram showing a multi-party call service providing apparatus in a conventional exchange.

2 is a diagram illustrating a multi-party call service providing apparatus in an ALL IP mobile communication network according to the present invention;

3 to 5 are diagrams for explaining a multi-party call service providing method in an ALL IP mobile communication network according to the present invention.

*** Explanation of symbols for the main parts of the drawing ***

30.Wireless Call Agent (WCA), 40.HLR (Home Location Register),

50. Radio Nerwork Controller (RNC), 60. Voice Feature Server (VFS),

70.Signaling Gateway (SG), 80.Trunk Gateway (TG)

According to an aspect of the present invention, there is provided an apparatus for providing a multi-party call service in an ALL IP mobile communication network, comprising: a Voice Feature Server (VFS) for providing announcement and multi-call service functions in an IP mobile communication network; A WCA (Wireless Call Agent) for performing a call control function using a VoIP and VoATM network and connecting a terminal to which a multi-party call is to be connected to the VFS; A Home Location Register (HLR) for providing subscriber information stored according to the request of the WCA; A Radio Nerwork Controller (RNC) that provides an interface between the WCA and a wireless section and performs location registration and call control for a mobile subscriber; A trunk gateway for relay matching between the WCA and an existing network; And a signal gateway for signal matching between the WCA and No. 7 signal networks.

On the other hand, the present invention provides a method for providing a conference call service in an ALL IP mobile communication network, the method comprising: receiving a request for a conference call from a terminal having a call setup with another terminal; Controlling the RNC performing call control of the terminal to transition the call with the other terminal to a held state; Establishing a call with a new terminal that is requested to have a conference call with the terminal by controlling an RNC performing call control of the terminal; And connecting the terminal, another terminal, and a new terminal to a VFS providing a conference call service.

The establishing of the call with the new terminal may include requesting a new connection establishment for the RTP stream with the new terminal to the RNC performing call control of the terminal; Receiving notification from the RNC performing call control of the terminal that a new connection to an endpoint has been established; Receiving notification that the new terminal has answered from the RNC performing call control of the new terminal; And changing the connection mode to a transmission / reception state.

And, the process of providing the multi-party call service, the call between the terminal and the VFS for providing a multi-party call service by controlling the RNC to perform the call control of the terminal and release the call setting between the new terminal Setting a process; Establishing a call between the other terminal and the VFS by controlling an RNC that performs call control of the other terminal; And controlling a RNC that performs call control of the new terminal to establish a call between the new terminal and the VFS.

Hereinafter, an apparatus and method for providing a multiparty call service in an ALL IP mobile communication network according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a road showing a multi-party call service providing apparatus in an ALL IP mobile communication network according to the present invention, a wireless call agent (WCA) 30, an HLR 40, a radio network controller (RNC) 50, A Voice Feature Server (VFS) 60, a Signaling Gateway (SG) 70, and a TG (Trunk Gateway) 80 are provided.

In such a configuration, the WCA 30 performs a function of an existing exchange by using a Voice over Internet Protocol (VoIP) or a Voice over ATM (VoATM) to perform a call control function, and the WCA 30 provides mobility. Contact the subscriber's information to the HLR 40 to obtain information. And, by connecting the terminals to perform the multi-party call to the VFS (60) to allow the subscriber to receive the multi-party call service.

The HLR 40 stores subscriber information in a mobile network, and stores location information and additional service information per subscriber.

The RNC 50 provides an interface between the WCA 30 and the radio section, and performs location registration and call control functions for mobile subscribers in the area controlled by the RNC 50.

The VFS 60 provides a voice service function such as announcement broadcasting and multiple calls in an IP mobile communication network.

The SG 70 operates as a gateway between a MTP (Message Transfer Part) based SS7 network of a Public Switched Telephone Network (PSTN) or a PLMN network and an M3UA based SS7 network of a WCA 30 network.

The TG 80 performs an interface function between a Realtime Transport Protocol (RTP) voice network and a PSTN or PLMN network, which is a circuit-based network.

The ALL IP mobile communication network of the above-described configuration is controlled according to a standardized protocol as shown in Table 1, and as shown in Table 1, the WCA 30 and the HLR 40 define inter-system operation of the mobile communication network. Messages are sent and received according to the recommendation IS-41D, and the WCA 30 and RNC 50 send and receive messages according to PN-4545, which is a mutual protocol for CDMA 2000 access network.

WCA-HLR WCA-RNC WCA-SG WCA-TG / VFS IS-41D TCAP PN-4545 SCCP SCCP (ISUP) M3UA M3UA M3UA MGCP / Megacop SCTP SCTP SCTP UDP IP IP IP IP L2 L2 L2 L2 L1 L1 L1 L1

In Table 1, SCTP is an application-level datagram transport protocol, M3UA is a protocol for carrying SS7 MTP3-user signals (ISUP, SCCP) in IP mobile networks using SCTP, and SCCP is a global title. (global title) A protocol that performs data transfer functions in connectionless or connection-oriented networks, including translations, and is responsible for part of the No. 7 protocol.

TCAP is a protocol that carries information between two or more nodes in a signaling network. TCAP performs transaction processing that manages remote operations using SCCP message forwarding.

MGCP / megacop is a protocol for external call agent to control gateway in VoIP network.

3 to 5 are diagrams for explaining a multi-party call service providing method in the ALL IP mobile communication network according to the present invention.

First, as shown in Fig. 5 (a), in a state where call setup is made between MS A and MS B, MS A transitions the already-connected MS B to a hold state and establishes a new call with MS C. A flash with information message is sent to the WCA 30 to request.

That is, the WCA 30 handles a call between A and B from MS A, which is already connected to MS B, and a call waiting response (flash of C) containing a called number (number of C) for establishing a new call to MS C. with information) Receive a message (S10).

In step S10, the WCA 30, which has received the response message for the new call from the MS A, instructs the RNC1 53, which performs the location registration and call control function for the MS A, to hold the call with the MS B. (S12), the RNC1 receives a response message for the call hold instruction (S14).

The RNC2 55 then performs location registration and call control functions for the MS B to change the connection (connection between the physical and logical endpoints) to an inactive state to provide a hold tone to the MS B. If the request (S16), and receives a response message for the request from the RNC2 (55) (S18), and requests the MS B to provide a pending sound (S20).

In step S20, the RNC2 55, which has received a request from the WCA 30 to provide the MS B with a pending sound, provides the MS B with a pending sound.

Thereafter, the RNC1 53 requests a new connection establishment for the RTP stream with the MS C, and an R1 (End Point) from the RNC1 53 to the end point of the data (Physical / Logical Matching Point) where the data is created / ended. You are notified that a new connection has been established (S22, S24).

Then, when notified that the MS C has responded from the RNC3 (57), which performs the location registration and call control function for the MS C (S26), the MS A and the MS C to the RNC1 (53) for transmitting and receiving the RTP stream. When requesting to change the EP1 / c3 connection mode to a 'send / receive (sendrcv)' state (S28), and receiving a response message (S30), as shown in (b) of FIG. 5, MS A and MS C The call between is established.

Subsequently, upon receiving a flash with information message requesting the conference call from the MS A / RNC1 53 (S32), the RNC1 53 is configured to establish a connection to the VFS 60, which is the conference equipment. It requests to change the mode of EP1 / c3 to the 'inactive' state (S34), and receives a response message (S36).

Subsequently, a new connection ID is generated in EP4 in conferencing mode by sending the SDP of RNC1 53 (described as a protocol for distinguishing each user data path in an IP mobile communication network) 1 to VFS 60 and describing the logical endpoint of the endpoint. In this case, the VFS 60 is informed that the connection has been created with the contents of EP4 / c5 / SDP4 (S38 and S40).

In step S40, the WCA 30 notified that a new connection has been created from the VFS 60 requests the RNC1 53 to release the c3 connection generated for the bilateral call between the MS A and the MS C. The response message is received (S42, S44).

Subsequently, c5 / SDP4 of the VFS 60 is transmitted to the RNC1 53 to change the mode of the RNC1 53 to send / receive (sendrcv) for the RTP stream transmission / reception between the RNC1 53 and the VFS 60. Request to change to the state (S46), and receives a response message thereto (S48).

In addition, SDP2 of the RNC2 55 is transmitted to the VFS 60 to request the EP4 to generate a new connection ID in the conference mode (S50), and notify that the connection has been created with the contents of EP4 / c6 / SDP4 from the VFS 60. Receive (S52).

Subsequently, c2 / SDP4 of the VFS 60 is transmitted to the RNC2 55 to change the mode of the RNC2 55 to the 'transmit and receive' state for transmitting / receiving an RTP stream between the RNC2 55 and the VFS 60. Request (S54), and receives a response message (S56).

In addition, SDP3 of the RNC3 57 is transmitted to the VFS 60 to request the EP4 to generate a new connection ID in the conference mode (S58), and the connection is generated from the VFS 60 to the contents of EP4 / c7 / SDP4. Receive (S60).

In addition, C4 / SDP4 of the VFS 60 is transmitted to the RNC3 57 to change the mode of the RNC3 57 to the 'send / receive' state for transmitting / receiving the RTP stream between the RNC3 57 and the VFS 60. If a request is made (S62) and a response message is received (S64), a call between MS A, MS b, and MS C is established as shown in Fig. 5C.

The apparatus and method for providing a multi-party call service in an ALL IP mobile communication network of the present invention is not limited to the above-described embodiments and may be variously modified and implemented within the scope of the technical idea of the present invention.

According to the apparatus and method for providing a multi-party call service in the ALL IP mobile communication network of the present invention as described above, by connecting a terminal to perform a multi-party call in a WCA performing a call control function to a VFS providing a multi-call function In addition, it is effective to provide a multi-party call service in an ALL IP mobile communication network.

Claims (4)

Voice Feature Server (VFS) for providing announcement and multi-call service functions in an IP mobile communication network; A WCA (Wireless Call Agent) for performing a call control function using a VoIP and VoATM network and connecting a terminal to which a multi-party call is to be connected to the VFS; A Home Location Register (HLR) for providing subscriber information stored according to the request of the WCA; A Radio Nerwork Controller (RNC) that provides an interface between the WCA and a wireless section and performs location registration and call control for a mobile subscriber; A trunk gateway for relay matching between the WCA and an existing network; And a signal gateway for signal matching between the WCA and No. 7 signaling networks. Receiving a multi-party call from a terminal having a call setup with another terminal; Controlling the RNC performing call control of the terminal to transition the call with the other terminal to a held state; Establishing a call with a new terminal that is requested to have a conference call with the terminal by controlling an RNC performing call control of the terminal; And providing a multi-party call service by connecting the terminal, another terminal, and a new terminal to a VFS providing a multi-party call service. The method of claim 2, wherein the establishing of the call with the new terminal comprises: Requesting a new connection establishment for an RTP stream with the new terminal to the RNC performing call control of the terminal; Receiving notification from the RNC performing call control of the terminal that a new connection to an endpoint has been established; Receiving notification that the new terminal has answered from the RNC performing call control of the new terminal; The method of claim 1, further comprising changing the connection mode to a transmission and reception state. The method of claim 2, wherein the providing of the conference call service comprises: Canceling call setup between the terminal and the new terminal, and controlling a RNC that performs call control of the terminal to establish a call between the terminal and a VFS providing a multi-party call service; Establishing a call between the other terminal and the VFS by controlling an RNC that performs call control of the other terminal; And establishing a call between the new terminal and the VFS by controlling an RNC that performs call control of the new terminal.