KR20010061323A - System and method for supporting internet phone service - Google Patents

Abstract

PURPOSE: A method and system for supporting an Internet phone service is provided to support the voice communication between mobile subscribers and an Internet host through an IWF(Inter Working Function) providing data communication services. CONSTITUTION: A mobile phone transfers a call setup message(Setup1), including a service option number, to a BSC to attempt access for Internet phone call setup(S1). The BSC recognizes the Internet phone call from the service option number of the call setup message and starts the call setup between the mobile phone and the second block of an IWF(S2). The second block allocates a network resource to the subscriber if the request from the first block is received. Then the second block sends a call request message(Setup2) to the other side's Internet host(S3). In case that the Internet host is in an active state, a protocol negotiation to set up the Internet phone call is made between the second block and the Internet host(S4). Afterward, as the first block allocates a path with an MSC and requests the second block to allocate an idle resource, a call path is set up between the mobile phone and the first block(S5). Then an alerting tone is transferred to the mobile phone(S6,S7). If a connection request message(Connect) is transferred from the Internet host(S8,S9), the subscriber transfers a response message(Connect Ack) to the Internet host and starts the voice call(S9,S10).

Description

System and method for supporting internet phone service}

The present invention relates to a data communication service, and more particularly, to a method and a system for supporting an Internet phone service using a network interworking device to provide a voice communication with a computer user connected to the Internet to a digital mobile subscriber or a personal mobile communication subscriber. will be.

Today, the Internet is making great progress worldwide. The impact of the Internet on our lives is growing, and the industrial ripple effect of the development of the Internet is not negligible.

At this point, mobile communication service companies have recently provided wireless data communication services that provide data communication services by interworking the mobile communication network and the Internet in an effort to overcome extremely limited communication services due to the wireless environment and to satisfy the needs of the subscribers. Doing.

1 is a view showing the configuration of a conventional wireless data communication system.

Referring to Fig. 1, a computer 1 connected to a mobile telephone 2 uses a general point-to-point connection emulator for dialing up. When making a call using a PPP connection emulator as if using a wired modem, the mobile telephone 2 attaches a service option for the service and requests a packet call from the system side.

The packet call request of the mobile telephone 2 is delivered to the switching center (MSC) 5 via the base station (BTS) 3 and the control station (BSC) 4. At this time, the switching center 5 confirms the required data service and establishes a connection with the network interworking device (IWF) 6.

That is, when there is a packet call request from the mobile phone 2, the switching center (MSC) 5 recognizes the packet option and connects the call to the network interworking device (IWF). (6) assigns a valid channel of the trunk for communication and checks the existence of idle resources to set up the packet data path.

To this end, the IWF 6 has a first block 6a for route setting / release and a second block 6b for allocating / reallocating / releasing idle resources. In particular, the second block 6b has a PPP server, Internet protocol routing, and an interface function for connection with the Internet.

An end-to-end PPP connection is established between the computer 1 and the second block 6b of the network interworking device 6 along the call path set up as described above. It executes a program, that is, a Telnet (Telecommunication network), a File Transfer Protocol (FTP) emulator, or a web browser.

Thereafter, an IP protocol datagram is transmitted between the mobile subscriber and the Internet host 7 connected to the Internet.

In the past, a network interworking device was used for wireless data service of digital mobile communication and personal mobile communication. In the wireless data service using this network interworking device, only packet data transmission is supported between mobile subscriber and internet host. The ability to make voice calls between a subscriber and an Internet host connected to the Internet is not supported.

An object of the present invention has been made in view of the above points, in particular, the existing packet data communication service support through a network interworking device that provides a data communication service by interworking the mobile communication network and the Internet, the mobile subscriber Provided is a method and system for supporting an internet phone service suitable for supporting a voice call between an internet host and an internet host.

A feature of the Internet phone service support method according to the present invention for achieving the above object is that, as the mobile phone enters the Internet protocol address (IP address) of the Internet host of the other party to the subscriber, the mobile phone is connected to the Internet phone Attempting to establish a call for establishing a call and establishing a wireless path with the switching center, checking a state of the Internet host after establishing the wireless path, negotiating a protocol between the network interworking device and the Internet host, and negotiating the protocol. After this is completed, the network interworking device allocates an idle resource to establish a call path with the mobile phone, and performs a voice call between the mobile phone and the internet host through the set call path.

Preferably, in the negotiating protocol between the network interworking device and the Internet host, the procedure and method for voice data transmission, voice compression and coding are negotiated, and the protocol negotiation for the voice compression at this time is PCM (Pulse). And a compression algorithm of a specific conversion format for converting voice data of a Code Modulation) into packet data of a specific language format that can be recognized by the Internet host.

A feature of the Internet phone service support system according to the present invention for achieving the above object is provided with a service option for the Internet phone service, the mobile phone for sending a call for the Internet phone service, and transfer from the mobile phone A control station that distinguishes whether the call is an Internet phone call or a general voice call, and if an Internet phone call is transmitted from the control station, sets / releases a route for the call, codes and compresses voice data, and accesses the Internet phone service. And a network interworking device supporting a protocol for transmitting and receiving voice data to and from the mobile phone through the network interworking device in a standby state.

Here, the network interworking device receives voice data of a PCM (Pulse Code Modulation) type coded by the control station as an input, compresses the packet data in a specific language format that can be recognized by the Internet host, and receives the data from the Internet host. The transmitted packet data is converted into the PCM voice data.

1 is a diagram showing the configuration of a conventional general wireless data communication system.

2 is a diagram showing a system configuration for supporting an Internet phone service of the present invention.

3 is a flowchart showing an Internet phone service procedure of the present invention.

* Description of the symbols for the main parts of the drawings *

10: mobile phone 20: base station (BTS)

30: control station (BSC) 40: exchange station (MSC)

50: network interworking device (IWF) 60: Internet host

Hereinafter, a preferred embodiment of an internet phone service supporting method and system according to the present invention will be described with reference to the accompanying drawings.

In the present invention, a network interworking device (IWF) is matched with a switching center (MSC), and a system configuration as shown in FIG. 2 is used for a voice call between a digital mobile subscriber or a personal mobile communication subscriber and an Internet host connected to the Internet. .

2 is a diagram showing a system configuration for supporting the Internet phone service of the present invention.

2, the mobile phone 10 provides a service option for notifying that it is an Internet phone call. It also makes a call for the Internet phone service of the present invention.

The control station (BSC) 30 distinguishes whether the call transmitted through the base station (BTS) 20 is an Internet phone call or a general voice call, and, in the case of an Internet phone call, interworks with a next switching center (MSC) 40. This Internet phone call is delivered to the first block 51 of the device (IWF) 50.

The first block 51 of the network interworking device 50 is connected to the switching center (MSC) 40, which establishes and releases the radio path. The first block 51 also provides a call path between the switching center (MSC) 40 and the second block 52.

The second block 52 of the network interworking device 50 performs voice coding and compression, and supports a protocol for accessing an internet phone with the other party's Internet host 60. It also acts as a gateway to the Internet.

In particular, in performing the voice coding and the compression, the second block 52 inputs the voice data in the form of Pulse Code Modulation (PCM), which is the output of the Vocoder provided in the control station (BSC) 30, It compresses the packet data in a specific language format that the other side Internet host 60 can recognize. In other words, the second block 52 converts the input PCM voice data into packet data using a compression algorithm of a specific conversion format.

In addition, the second block 52 converts the packet data transmitted from the Internet host 60 into PCM voice data suitable for the mobile communication network.

The Internet host 60 is equipped with a sound card and a microphone, and an application program of the Internet phone emulator is embedded.

The following describes in more detail the procedure for supporting the Internet phone service of the present invention using the system configuration described above.

3 is a flowchart illustrating an Internet phone service procedure of the present invention.

Referring to Fig. 3, a digital mobile subscriber or a personal mobile subscriber selects the service option of his mobile phone 10 as the Internet phone service mode.

After that, the subscriber enters the Internet Protocol address (IP address) of the Internet host 60 of the other party to be connected instead of the telephone number and presses a call key. By the way, there is a dot (dot) for type classification in the address of the Internet host 60, in the present invention, when the subscriber enters the Internet protocol address, the dot is not input.

Thereafter, the mobile telephone 10 transmits a call setup message (SETUP1) including a service option number which is not currently being used to the control station (BSC) 30 (S1), in the same manner as the general voice call connection procedure. Attempt a connection to configure.

The control station (BSC) 30 first distinguishes the Internet phone call by the service option number of the call setup message SETUP1 received from the mobile phone 10, and then the mobile phone 10 and the network interworking device 50. The call setup between the second blocks 52 is started (S2).

In this call setup (S2), the control station 30 first establishes a radio path between the mobile telephone 10 and the switching center 40, and the switching center (MSC) 40 sends a call setting message to the network interworking device ( The first block 51 of the IWF) 50.

When the second block 52 is requested to allocate idle resources from the first block 51, the second block 52 allocates network resources to the subscriber, sends a message (SETUP2) requesting a call to the counterpart Internet host 60, and displays its status. Check (S3).

At this time, if the Internet host 60 is in an active state, protocol negotiation for establishing an Internet phone call is performed between the second block 52 and the Internet host 60 (S4).

In the protocol negotiation between the second block 52 and the Internet host 60, the voice data transmission protocol is negotiated and the procedures and methods for voice compression and coding are negotiated.

The first block 51 then allocates a path with the switching center (MSC) 40 and requests and allocates idle resources to the second block 52. This establishes a call path between the mobile phone 10 and the first block 51 (S5).

After that, the ringing tone (Alerting) is transmitted to the mobile phone 10 (S6, S7), the Internet host 60 is in a standby state.

When the subscriber receives the connection request message (Connect) from the Internet host 60 after the incoming ringing (Alerting) (S8, S9), the subscriber transmits a response message (Connect Ack) to the Internet host 60 to start the voice call. (S9, S10).

The present invention allows mobile subscribers to make voice calls with computer users connected to the Internet in consideration of the mobile characteristics of the mobile communication service and the low cost of the Internet. Therefore, the long-distance communication, such as international calls, the phone charge is much cheaper.

In addition, when the video phone is commercialized in the future, the ripple effect can be maximized.

Claims (5)

As the subscriber enters an Internet Protocol address (IP address) of the other party's Internet host to be connected to the mobile phone, the mobile phone attempts to establish an Internet phone call and establishes a wireless path with the switching center; Checking a state of the internet host after negotiating the wireless path, and negotiating a protocol between a network interworking device and the internet host; Setting up a call route with the mobile telephone by allocating idle resources after the protocol negotiation is completed; And performing a voice call between the mobile telephone and the internet host through the set call path. The method of claim 1, wherein the negotiating protocol between the network interworking device and the Internet host comprises negotiating a procedure and a method for voice data transmission, voice compression, and coding. The method of claim 2, wherein the protocol negotiation for speech compression comprises a compression algorithm of a specific conversion format for converting voice data in the form of Pulse Code Modulation (PCM) into packet data of a specific language format that can be recognized by the Internet host. Internet phone service support method characterized in that for. A service option for an internet phone service is provided, and a mobile phone for making a call for the internet phone service; A control station that distinguishes whether the call transferred from the mobile phone is an Internet phone call or a general voice call; When the Internet phone call is transmitted from the control station, a network interworking device that sets / cancels a path for the Internet phone call, supports voice data coding and compression, and a protocol for accessing the Internet phone service; Internet phone service support system, characterized in that it comprises an Internet host for transmitting and receiving voice data with the mobile phone through the network interworking device in the reception standby state. 5. The apparatus of claim 4, wherein the network interworking device receives voice data in the form of Pulse Code Modulation (PCM) coded by the control station, and compresses the packet data into a specific language format that can be recognized by the Internet host. And converting the packet data transmitted from the internet host into the PCM voice data.