KR20010081872A - Method for providing voice communication for a mobile phone - Google Patents

Abstract

PURPOSE: A voice call method in a wireless terminal and a method for providing thereof are provided to achieve a voice call via a data server by transmitting and receiving the voice data of a mobile terminal in a packet method. CONSTITUTION: A physical layer module(H10) is composed by an MSM, an RF transmitter, and an RF receiver. A call processor(P100) is composed by the MSM executing call request and call response in accordance with IS95A or IS95B and a call processing program executed by a CPU. A data link layer module(S11) executes sequence control and retransmission for the reliability of inter-link data transmission. A network layer module(S12) executes access to networks, address allocation, and the segmentation and reassembly of a data stream. A TCP program(S21) is to transmit end-to-end packet data, without loss, by the sequence control and retransmission of data. An access protocol part(S22) is to receive files or hyper-text data from the other side end. A UDP(User Datagram Protocol) program(S31) packetizes received data and transmits the packetized data to the other side end. An RTP program(S32) carries out selection or rejection according to the size of the delay time of received packet data. A voice processing program(S100) differentially executes the processing of voice data according to a user's selection request or the type of a received call.

Description

Method for providing voice communication of a wireless terminal and a method for providing the same {Method for providing voice communication for a mobile phone}

The present invention relates to a method for providing a voice call of a wireless terminal such as a mobile communication terminal by relaying voice data through a server connected to a data network.

In general, voice communication between mobile communication terminals is made through a mobile communication network composed of a mobile telephone exchange having a circuit switching function. In today's data communication, mobile communication terminals are provided with WAP (Wireless Application Protocol) and A program for the same data communication service may be embedded to connect to a data server to use various data services through the Internet.

However, as described above, when the mobile communication terminal accesses a data network or performs a voice call with another terminal, since each of them is performed by a separate signaling method, two services are provided in one network. Since it cannot be used simultaneously by the connection, when a user wants to use both a voice call and a data use service, there is a problem of having to perform connection and disconnection and reconnection to the mobile communication network, respectively.

In addition, in the case of a voice call, since voice data is transmitted and received in real time through a virtual fixed line formed between terminals through a mobile communication network, it is very difficult to provide various additional information or provide various voice services through the virtual line.

The present invention has been made to solve the above problems, and by transmitting and receiving the voice data of the mobile communication terminal in a packet method, it is possible to make a voice call via the data server, and the virtual line together with the voice and additional data It is an object of the present invention to provide a voice communication method of a wireless terminal that can be used.

1 illustrates a configuration of an entire network in which a voice call is made between mobile communication terminals according to a method for providing a voice call of a wireless terminal according to the present invention.

2 illustrates a configuration of a mobile communication terminal according to the present invention for performing a voice call via the data / voice server of FIG.

FIG. 3 is a diagram schematically illustrating a protocol layer consisting of a part of the hardware of FIG. 2 and a program on a ROM, for the mobile communication terminal of FIG. 1 to perform a voice call method according to the present invention.

4 is a diagram schematically showing the hardware and software structure of the data / voice server of FIG. 1 relaying voice calls between mobile communication terminals.

FIG. 5 illustrates a procedure of making a voice call between mobile communication terminals via the data / voice server of FIG. 1 in chronological order;

6A and 6B illustrate a configuration of a general mobile communication terminal that does not support packet type call and its protocol layer, respectively.

※ Explanation of code for main part of drawing

10: car pad 10a, 10b: mobile communication terminal

11: keypad connection 20: flash memory

30: LCD 31: LCD driver

40: station 45, 45a: central processing unit

46: path select switch 50, 50a: ROM

60: codec 61: A / D converter

62: D / A converter 70: wireless transmitter

71: wireless receiving unit 100n: base station

105: base station controller 110: mobile communication switch

200: data / voice server 201: data transmission / reception module

202: packet data processing module 203: voice data processing module

204: data service module 204a: data storage module

205: call processing and operation module 210: voice packet exchange module

220: subscriber management module

In order to achieve the above object, a server providing a data communication service according to the present invention, when receiving a call request from an originating radio terminal through a mobile communication network, connects a call in response to the received call request, Transmitting data constituting information for inputting the telephone number of the terminal, and receiving the incoming telephone number input through the outgoing wireless terminal based on the transmitted information through a mobile communication network, the wireless terminal of the received telephone number Request a call connection with the terminal, and if a call connection is made with the terminating wireless terminal by the request, after confirming that the communication mode of the terminating wireless terminal supports the packet communication mode, based on the confirmed supported communication mode, Whether to perform packet conversion and inverse conversion on voice data to be transmitted and received with the destination wireless terminal If the voice data is received from the originating or terminating radio terminal, the data is processed through the set process path and transmitted to the other party's radio terminal. It is characteristic to make it.

Hereinafter, a preferred embodiment of a voice call method and a method of providing the same according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a configuration of an entire network in which voice calls are made between mobile communication terminals (hereinafter referred to as "mobile phones") according to a voice call providing method of a wireless terminal according to the present invention. Cell phones 10a and 10b, base stations 100n, n = 1, 2, ... that exchange signals according to a radio signal protocol with the mobile phones, and signals to be received or transmitted from multiple base stations Exchanges call data from the base station controller 105 with the base station controller 105 which communicates with the mobile phone according to a link protocol with the mobile phone, searches for a destination of the required call, and calls the call to an appropriate place. And a data / voice server 200 which exchanges and relays the processing of a call received from the switch and a received packet or non-packet type voice message.

2 illustrates the configuration of the mobile phones 10a and 10b according to the present invention for carrying out a voice call via the data / voice server 200, wherein the mobile phones 10a and 10b are called party's telephone numbers. A keypad 10 for data input; A keypad connector 11 connected to the keypad 10 to receive key input data; A flash memory 20 storing necessary information of a mobile phone and a user; An LCD (Liquid Crystal Display) 30 for outputting and displaying information necessary for operation; An LCD driver 31 for converting data into an LCD display signal; A ROM 50 in which a program is stored; A codec (Coder-Decoder) 60 for converting and inputting compressed digital audio data into an analog audio signal and converting the analog audio signal into digital compressed audio data; A switch 46 for setting a data path of compressed voice data of the codec 60; An A / D converter 61 for amplifying the analog audio signal input through the microphone Mic to a predetermined level and converting the analog audio signal into digital data; A D / A converter 62 for converting digital data into an analog audio signal and simultaneously amplifying the digital data to a speaker Sp; A radio transmitter (70) and a radio receiver (71) for wirelessly transmitting a signal carrying data to a mobile communication network and receiving an RF radio signal from a mobile communication network; A station unit 40 for performing demodulation and demodulation of data according to call processing and mobile communication protocols; And a central processing unit 45 that performs a program for processing data of the packet type recorded in the ROM 50 and an operation program necessary for various operations.

FIG. 3 schematically illustrates a protocol layer composed of a part of the hardware of FIG. 2 and a program on the ROM 50 for the mobile phone 10a or 10b to perform a voice call method according to the present invention. The voice data, which is compressed according to the QCELP method, is transmitted to the station unit 40 which performs channel coding and decoding suitable for a radio link, and the radio transceiver units 70 and 71 which transmit and receive radio signals. A call processing program (P100) constituted by a physical layer module (H10) configured by the controller, a station unit (40) which performs a call request and a response according to the IS95A or IS95B scheme, and a call processing program performed by the central processing unit; A data link layer module (S11) which performs sequence control and retransmission for reliability of data transmission between links, a connection to a network, an address assignment, and a fragment of a data stream. a network layer module (S12) for performing mentizing and reconstruction, and a TCP (Transmission Control Protocol) program for transmitting packet data between the end and end-to-end without loss by controlling and retransmitting the data. S21), a connection protocol unit S22 for receiving a file or hyper-text data with the other end, and the received data in a single packet to be transmitted to the other end and received therefrom. UDP (User Datagram Protocol) program (S31), the RTP program (S32) for self-selection according to the size of the delay time of the received packet data, and processing of the voice data according to the user's selection request or the type of the received call It consists of a voice processing program (S100) to perform differently.

FIG. 4 is a schematic diagram illustrating the integrated hardware and software structure of the data / voice server 200 of FIG. 1 in which a voice call is exchanged between the mobile phones 10a and 10b having the hardware and software of FIGS. 2 and 3. A data transmission / reception module 201 for performing data transmission / reception through a link with the exchange 110, a packet data processing module 202 for encapsulizing and decapsulating packet data with an opposite end, and A voice data processing module 203 that performs packetization and depacketization of speech data and de-packetization of speech data to be communicated with the other end, and identification information between end-to-ends that are provided upon request. Search for a file or hypertext information through the voice packet exchange module 210 and the packet data processing module 202 for proper distribution and relay of the voice packet. Provides a data service module 204, a data storage module 204a that stores additional information such as various advertisements or announcements, and manages personal information and access information of subscribers subscribed to the data / voice server 200. The subscriber management module 220 and the call processing and operation module 205 for processing the call requested from the mobile phone and controls the data flow between each module required for call processing.

Hereinafter, a process of using a data communication service in which a mobile phone having the configuration of FIGS. 2 and 3 accesses the data / voice server 200 having the configuration of FIG. 4 and retrieves information on the Internet will be described.

This process is only different according to the present invention between the components of the data / voice server 200 and the mobile phones (10a, 10b) having the components configured unlike the conventional mobile phones (see Figures 6a and 6b), Since the general process is the same as that of conventionally accessing the Internet using a mobile phone and then performing data retrieval, this process will be briefly described.

First, the user dials a telephone number or a special number already assigned to the data / voice server 200 through the keypad 10 while looking at the LCD 30, and the dialed information causes the keypad connection portion 11 to be dialed. Through the central processing unit 45 is recognized as data. The central processing unit 45 requests the call connection while providing the received dialing value to the station unit 40, and the station unit 40 uses a code division multiple access (CDMA) scheme. A call connection request signal is provided to the radio transmitter 70 together with the dial information on an access channel of a signal link so as to be transmitted to an originating exchange through a neighboring base station or repeater.

The originating exchange determines that the dialed destination number is a special number assigned to the server 200 providing a large amount of information based on its own or remote subscriber database, and is directly connected to the server 200 by a link. The call is routed to the destination exchange 110.

The destination exchange 110, which recognizes the destination from the routed call, transmits to the data / voice server 200 the information indicating the incoming call along with the caller's telephone number in accordance with the data link and the network protocol. The call processing and operation module 205 receiving this information through the data transmission / reception module 201 requests a search for the received caller information to the subscriber management module 220 and is registered from the subscriber management module 220. When a result of notifying whether the subscriber is notified or not, the data service module 204 is controlled according to the notified result to transmit data of the initial screen for the subscriber or the non-subscriber to the borrowed mobile phone 10a.

In this case, the initial screen data transmitted may be initial screen information reduced and configured only by text in a hypertext type web page in consideration of a small mobile communication terminal.

On the other hand, before transmitting the initial screen data, the data service module 204 automatically allocates the second half of the address on the network having a predetermined first half portion according to the port on which the call request was received, and thus selected whole. The address is transmitted to the mobile phone 10a or 10b which requests data connection through the path formed through the mobile communication network. The network address determined as described above is recognized by the network layer module S12 of the cellular phone, and accordingly, the cellular phone which is in the off-line state is classified as a unique address on the network, thereby becoming on-line. When sending or receiving data on the Internet, both the source and destination of the data are specified by this address, and the Internet will route the data based on this address.

The data of the initial screen provided by the data service module 204 is packetized by the packet data processing module 202, and is assigned a sequence number, thereby sequentially receiving an incoming exchange through the data transmission / reception module 201. 110), the call exchanger and the base station are sequentially sent to the caller mobile phone (10a or 10b).

In the caller mobile phone 10a or 10b, the station 40 decodes the signal received through the wireless receiver 71 to extract data on the call channel currently assigned to the mobile phone, and provides it to the data bus. During this process, the data link layer module (S11) is operated to ensure the reliability of data transmission and reception on the wireless link. When data loss occurs on the data path to the base station controller 105 (BSS) of the mobile communication network, retransmission is performed. This ensures that no data is lost over the radio path.

After extracting the data transmitted from the remote place by the operation of the physical layer module H10 and the data link layer module S11 and recovering if there is an error, the data protocol programs S12, S21 and S22 on the ROM 50 are executed. By performing the CPU 45, the additional data such as a header according to each protocol is excluded and only pure initial screen data is provided to the LCD driver 31 to be displayed as an initial screen on the LCD 30. Be sure to

After the user recognizes the information of the initial screen obtained by the interaction between the terminal and the network, the user transmits the data through the keypad 10 according to the information access method according to the instruction of the initial screen, and also sends the result data accordingly. By being provided through the above process, it is possible to retrieve and obtain desired data through the mobile communication terminal.

Hereinafter, a process of making a voice call between the mobile phones 10a and 10b via the data / voice server 200 will be described in detail with reference to the drawings of FIGS. 1 to 4. To illustrate this process, it is assumed that the call originator is mobile phone 10a and the call destination is mobile phone 10b.

FIG. 5 is a schematic diagram of a procedure according to a time sequence to clearly show a process of making a voice call between mobile phones 10a and 10b via the data / voice server 200. In the following description, a corresponding procedure is illustrated. In the case of the reference numerals of FIG.

First, the user sets the mode for determining the type of call he wants to talk through the keypad 10. In the call setup mode, there is a 'general call' mode and a 'packet call' mode. When the user wants to make a voice call with another mobile communication terminal via the data / voice server 200, the call setup mode is set to 'packet call' mode. Put it.

When the 'packet call' mode is set, the voice processing program S100 executed by the central processing unit 45 controls the switch 46 for setting the path of the real-time voice data and outputs the digital signal from the codec 60. The compressed voice data and the path of the digital compressed voice data received and decoded by the station unit 40 from the radio receiver 71 are set as data buses so that the central processing unit 45 can access the data.

With the mode set in this way, the user dials the telephone number or special number assigned to the data / voice server 200 on the keypad 10, and the call information is received by the above-described process. To the server 200 (step a1). When the data / voice server 200 responds to the call, the mobile communication network transmits the response information back to the calling mobile phone 10a (step a2), which is performed by the station unit 40. The central processing unit 45 recognized by the call processing processor P100 and notified that the call is connected to notify the voice processing program S100.

On the other hand, the call processing and operation module 205 receiving the call reception information through the data transmission and reception module 201 extracts the caller's telephone number from the call reception information and requests the information to the subscriber management module 220, If the subscriber management module 220 is notified that the subscriber is already registered, it requests the data service module 204 to configure initial screen data for the registered subscriber and transmit it to the calling mobile phone 10a. The initial screen information is provided with a window for selecting when a call with another mobile phone is desired and inputting a phone number of the other party's mobile phone.

The initial screen data transmitted by the data service module 204 (step a3) is displayed on the LCD 30 on the mobile phone 10a through the same process as described in the above-described data retrieval. Based on the information, the user selects a call with another mobile phone by using a dial key or a moving key on the keypad 10 and inputs a phone number of the mobile phone 10b to be connected.

The other party's telephone number input by this process is added with a header and a sequence corresponding to each layer by the data protocol programs S12, S21 and S22 executed by the central processing unit 45, and then the station unit 40. Data is converted according to the signaling method of the physical layer module (H10) performed in the) and is wirelessly propagated to the mobile communication network. The signal propagated as described above is received by the base station 100 ₁ and then demodulated by the corresponding protocol (RLP) on the base station controller (BSS) and reconstructed into data, and then the data / voice server 200 via a mobile communication switching network. Is passed to (step a4).

The data received through the data transmission / reception module 201 is transmitted to the sequence based on the additional header information by the protocol in the packet data processing module 202 corresponding to the data protocol programs S21 and S22 of the calling mobile phone 10a. If there is an error, it is re-received. If there is no error, the information on the other party's telephone number and the fact that the connection is requested is transmitted to the data service module 204.

The data service module 204 receiving the information informs the call processing and operation module 205 of the call request and operation module 205 to notify that the voice call has been requested. After providing the additional information for notifying the user in a packet manner (step a5), the key response of the mobile phone holder is displayed for a predetermined time, for example, as the presented additional information is displayed on the LCD 30 of the calling mobile phone 10a or output to the speaker. For example, when 3 seconds to 10 seconds have elapsed (event e1), or when the caller's mobile phone 10a does not release the call even after the predetermined time after the presentation of the information, the call connection is still maintained. Information on the call processing and operation module 205 is provided to make a call request with the desired counterpart.

This is to allow the mobile phone holder to call the other terminal only after viewing or listening to the information, for example, an advertisement or a notice, provided by the data service module 204.

As described above, instead of a method of requesting that the server 200 maintain the output state of the additional information for a predetermined time or more, before the call is connected, the voice processing program S100 of the cellular phone recognizes that the additional information has been received and decodes it. After outputting the data, the time is counted from the output time point, and after the predetermined time has elapsed, the server 200 may be notified of the fact.

On the other hand, the connection request phone number and the call processing and operation module 205, which recognizes the request, forms a signaling message requesting a call connection with the other party's phone number to configure the data transmission / reception module 201. It transmits to the exchange 110 which is connected and connected via (step b1). As such, the call connection signaling message transmitted to the mobile switching center 110 is carried on the paging channel of the radio signal by a base station (BTS) adjacent to the current location of the destination in the mobile communication network. Is again decrypted by the call processing processor (P100) received by the wireless receiving unit 71 of the incoming mobile phone (10b) and then performed in the station unit 40, thereby confirming that the call has been made and the call processing unit is the central processing unit. The central processing unit 45 transmits to the 45 and performs the voice processing program S100 contained in the ROM 50, and at the same time, an alarm sound or a message indicating that the call is received through the microphone or the LCD 30. Will print.

While the process for the call connection with the called party's mobile phone 10b is in progress, the call processing and operation module 205 causes the data service module 204 to make a packet-type call to the calling mobile phone 10a. Send the data requesting confirmation whether the mobile station can support the data transmission (step a6), and the voice processing program S100 of the calling mobile phone 10a that receives the request receives the response data indicating that it can support a packet-type call. The data processing protocol (S21, S22) is transmitted to the data service module 204 of the server 200, the data service module 204 provides this information to the call processing and operation module 205, the call processing And when the operation module 205 performs voice data processing with the calling mobile phone 10a, determines whether to packetize and its reverse process, that is, depacketization, and exchanges voice packets with the data transmission / reception module 201 accordingly. Module (210 It is set whether or not to pass the data path between the voice data processing module 203 for the voice data with the calling cellular phone 10a.

For the case where the calling cellular phone 10a does not support the packet communication mode and the method of data processing in the server 200 according to the data path setting described above, the call according to the communication method support mode of the incoming cell which will be described later. It will be described in detail in the process.

On the other hand, in response to the call connection request of the server 200, the person carrying the incoming mobile phone 10b recognizes the incoming call and presses a call answering key on the keypad 10, whereby a call answering message is displayed. When transmitted to the voice server 200 (step b2), the voice processing program S100 being executed by the central processing unit 45 confirms the currently set call mode. Since the call mode is previously set by the user and stored in the flash memory 20 as described above, after confirming the stored contents, if the current call mode is the 'packet call' mode, the voice processing program S100 is the calling mobile phone. As in (10a), the signal path of the switch 46 is set so that the voice data compressed by the codec 60 can be transmitted in a packet manner.

That is, the protocol S32, S31, S12, and S11 performed by the central processing unit 45 intervene on the path of the voice data so that the path of the voice data is set to pb in pa of FIG. Data of the call mode of the data is notified to the call processing and operation module 205 of the data / voice server 200 through the path of the mobile communication network set by the call response (step b3).

As described above, unlike the method of checking the current call mode and setting the path to the packet method, first, the call response message according to the hook-off of the user is transmitted to the mobile switching network. When the caller, that is, the data / voice server 200 and the virtual line is connected, a call for the currently set up call line between the call processing and operation module 205 of the server 200 and the voice processing program S100 of the terminal. By performing a data exchange process for mode designation and acceptance, it is possible to ignore the call mode currently set on the mobile phone 10b and to set the packet packet mode unconditionally.

When the call terminal 10b also receives a call response in the 'packet call' mode by the above-described process, the call processing and operation module 205 of the server 200 transmits a call number or data transmission / reception module ( At 201), the socket number is specified for the corresponding call, and the voice packet exchange module 210 is requested to the voice packet exchange module 210, and the exchange path and the corresponding data transmission / reception module 201 are transmitted. The data path between sockets is directly connected. That is, for the call in the 'packet call' mode between the terminals 10a and 10b, the data exchange is performed in the voice packet exchange module 210 without passing through the voice data processing module 203 in the server 200.

The call processing and operation module 205 does not perform the above-described method for providing a call with the calling party according to the call response of the called terminal 10b, but if a call is answered from the called terminal 10b, As described in the call request process of the calling mobile phone 10a, one of additional information such as an advertisement or a notice is selected and read from the data storage module 204a, and this is received in a packet manner through the data service module 204. In step 10b, the above-described procedure for providing a call between the called party and the called terminal may be performed only when there is confirmation of the additional information after a predetermined time has elapsed after the provision of the information.

On the other hand, the voice packet exchange module 210 that is requested to set the exchange path is assigned one identification number corresponding to the telephone number or the socket number of both sides, and to the unassigned queue among the queue (in the queue in operation) The identification numbers are assigned to queues for data exchange, and data is transferred only between the queues of the same identification number, so that the voice packet data of the originating party 10a and the called party 10b received through the queue Allow exchange to take place.

When the data exchange path between the terminals 10a and 10b currently requested to be connected on the server 200 is determined by the above process, the call processing and operation module 205 notifies that the call connection with the other party has been made. The packetized connection guide sound or guidance message is transmitted via the voice data processing module 203 to the calling mobile phone 10a to which the virtual server is currently connected to the server 200 (step a6-2).

Unlike the method of transmitting the guide sound after the call is connected with the caller 10b who has requested the call connection, the caller 10b and the server 200 from the time when the caller 10a requests the caller to call the caller 10b. It is also possible to use a method of repeatedly transmitting to the calling party 10a at regular intervals until a call connection is made (step a6-1), and stopping transmission of the guide sound at the moment of call connection. In this case, it is preferable to use the ring tone sound used in a general telephone network.

The signal carrying the guide sound or the guidance message transmitted from the data / voice server 200 is received by the calling mobile phone 10a, and the station unit 40 performs data according to the link layer (S11) protocol with the base station controller 105. After the extraction is made, it is transmitted by the switch 46 to the central processing unit 45 via the bus. This data is transmitted to the RTP program S32 as packet data of only a guide sound or a guide message through the network layer S12 protocol and the UDP program S31 performed by the central processing unit 45, and the RTP program ( S32 measures the delay time (time interval) between each received packet and discards the delay time when the degree of the delay time is deteriorating the sound quality. If not, the voice processing program (S100). To pass.

The voice processing program S100 transmits the voice packet transmitted from the RTP program S32 to the codec 60 to restore and output the compressed digital voice into uncompressed voice data, and the D / A converter 62. The amplified by the audible power and output to the speaker while converting it into an analog signal, so that the holder of the mobile phone 10a can recognize that the mobile phone 10b is in a state where the connection request can be made.

After a call is established between the calling mobile phone 10a and the called mobile phone 10b through the above process, when a voice is input through a microphone in one side, the input voice is amplified to a certain level and then A / D The converter 61 converts it into a 64 kbps digital bit stream, which is compressed by input to the codec 60, resulting in digital data having a reduced bit rate. The digital data is transmitted to the voice processing program S100 executed by the central processing unit 45 by the switch 46, and the voice processing program S100 transmits the codec 60 output data by a predetermined time unit or by a predetermined size. The data is divided into units and delivered to the RTP program S32.

The RTP program S32 adds information on a time difference between the received data units and transfers the information to the UDP program S31, and the UDP program S31 slices the received size into a size unit specified in the protocol. The network layer S12 sequentially transmits it to the network layer S12, and the network layer S12 adds a header including a sequence required for data, an information type, and the like, and sequentially transmits the header to the station unit 40 through the bus.

The station unit 40 collects the input data according to the IS95A or 95B signal standard, and collects the data in a predetermined time, for example, in 20 ms units, and loads the input data on the currently open call channel to the wireless transmitter 70. By doing so, it propagates to a mobile communication network. The signal propagated as described above is restored to the link layer data again through the base station and the base station controller of the mobile communication network, and then transmitted to the data / voice server 200 through the virtual circuits provided by the mobile switching center. In this way, the data provided to the data / voice server 200 is accumulated in the queue of the voice packet exchange module 210 which is already designated for the current set call in the call processing and operation module 205, and the data accumulated in the queue is voiced. The queue and the identification number are moved to the same counterpart queue again by the packet exchange module 210, and then transferred to the data transmission / reception module 210 through a socket opened corresponding to the queue. The module 210 loads the input data on the time-divided transmission channel of the communication line with the switch 110 corresponding to the socket, and transmits the input data to the mobile communication network, and the mobile communication network receives the received data. The data is transmitted to the other terminal through the virtual line which is currently connected.

The signal including the transmitted data is restored to packetized voice data through the wireless receiving unit 70 and the station unit 40 of the receiving mobile phone, and the packet voice data is reversed in the packetization process of the transmitting side. The fragmented voice data is restored by the protocol programs S12, S31, and S32 which perform. At this time, the RTP program S32 extracts the information of the time interval between the received pieces of data, compares the time interval between the time interval and the time interval received from the program S31 of the actual lower layer, and makes the difference exceed the specified reference value. After that, the fragment packet is discarded. This is because when a partial sound of a fragment packet is delayed too much compared to a fragment of a packet compared to the original fragment and is transmitted, it is rather audible to the human voice. This is because it lowers the force.

When receiving the fragmented speech data from the RTP program S32, the speech processing program S100 is immediately transmitted to the codec 60 to be restored to the actual sound. However, a time gap is generated between receiving and receiving the fragmented speech data. In this case, by generating and inserting silent data into this portion, the digital bit stream having a variable bit rate is continuously applied to the codec 60.

The digital voice data decoded by the codec 60 is converted into analog voice by the D / A converter 62, amplified and output through the speaker, so that the voice pronounced by the sender of the mobile phone 10a is converted into the data / voice server 200. Via the mobile phone 10b to the receiver's ear (step c1).

In the above-described embodiment, the station unit 40 does not occupy the connected communication channel until the call is terminated, and if no data to be transmitted is input for more than a predetermined time period, the station unit 40 performs a reverse or two-way communication of the wirelessly connected communication channels. When both the forward and the reverse are released in consultation with the base station, and the data to be transmitted is received through the bus, the packetized voice data may be transmitted by requesting the base station to occupy an empty communication channel. By adopting such a method, since a user may use a wireless communication channel in a silent part where voice is not actually transmitted even during a call, the utility of radio resources is increased.

Previously, after the data / voice server 200 requests a call connection to the incoming mobile phone 10b, the incoming mobile phone 10b sets the call mode in the 'normal call' mode in the process of checking the call mode of the incoming mobile phone 10b. -In this mode, the switch 46 sets the voice data path to the station unit 40 and the codec 60-or the configuration in which the incoming mobile phone does not support the 'packet call' mode as shown in FIGS. 6A and 6B. 6A and the protocol structure (FIG. 6B), the call processing and operation module 205 of the server 200 recognizes this fact and accordingly voice packetization and de-packet. It is to set the data path to perform in the server 200 for the conversion.

The call processing and operation module 205, when the connected mobile phone is a terminal having the configuration of Figs. 2 and 3, it can be known by requesting the information on the call mode to receive the 'general call' mode designation facts. In the case of the terminal having the configuration of FIGS. 6A and 6B, since information on a specific mode is not exchanged from a mobile phone, to request a mode information after a call connection and wait for a predetermined time in order to set a mode to conduct a call. After that, if there is no response, or if the information on the call mode of the terminal is not received within a predetermined time after the call is connected, the terminal is regarded as supporting only the 'general call' mode and the data in the server 200 is assumed. Set the path.

That is, the call processing and operation module 205 of the server 200 sets a data path directly between the data transmission / reception module 201 and the voice packet exchange module 210 as described above for the 'packet call'. For the general call, the voice data processing module 203 is interposed between the data transmission / reception module 201 and the voice data exchange module 210 so that the voice data processing module 203 can packetize and depacketize the voice data. The data format transmitted / received by the cellular phone in the 'normal call' mode is matched to the packet format of the counterpart terminal.

According to the path setting in the server 200, the mobile phone that supports the 'packet call' mode and the data transmission and reception module 201 to the packetized voice data exchanged or to be exchanged through the voice packet exchange module 210 By directly transmitting and receiving through a), the real-time voice through the UDP program (S31) and the RTP program (S32) of the terminal and vice versa to make the real-time voice packetized, if the terminal does not support the 'packet call' mode The real-time voice data received from the terminal through the data transmission / reception module 201 is packetized through the voice data processing module 203 and exchanged through the voice packet exchange module 210 for transmission, and the voice packet exchange module 210 is transmitted. The packetized voice data to be exchanged at and transmitted to the terminal may be transmitted through the voice data processing module 203 in the same process as that performed by the aforementioned packet support terminal. By converting the data into real-time voice data and providing the same through the data transmission / reception module 201, the terminal performs channel decoding on the data by the mobile communication protocol in the station unit 40 without a separate depacketization process. It converts to real-time voice output.

Thus, a voice call is made between the mobile phone that supports the packet method and the mobile phone that does not support the packet method via the data / voice server 200.

Supports packet method but calls in 'general call' mode (except when calling in 'general call' mode via the data / voice server 200, but only via mobile communication network without passing through the server 200) In the case of the call, the voice data path becomes pa , as shown in FIG. Coded or decoded to be transmitted and received through the call channel to make a call between the two parties.

In addition, the call processing and operation module 205 of the server 200 requests the data service module 204 for the cellular phone that is called in a packet manner, and additional information such as an advertisement stored in the data storage module 204a. Reads and muxes the packetized voice data in the data transmission / reception module 201 through the packet data processing module 202 to be transmitted to the corresponding terminal (step d1). Output to the LCD (30).

In this case, when additional information is transmitted during a call, the additional information to be transmitted is large in size, such as a video or an image, and it takes a long time to present it before the call so that the mobile phone user can recognize it. By transmitting relatively long data to the mobile phone during the call, the display is displayed on the LCD 30 when dialing on the keypad 10 of the mobile phone for another call (event e2) after completion of the call via the server 200. The additional information can be confirmed.

To this end, the central processing unit 45 of the mobile phones 10a and 10b stores the packet data received through the packet data protocols S12, S21 and S22 during the call in the flash memory 20, and then the contents are updated. Until the mobile phone is powered on or a folder is opened (event e3).

In the above-described embodiment, the wireless terminal talking through the server 200 has been described as an example in which a packet and a packet method or a packet and a general method are used as examples. If one call description is used as it is, both sides can provide a voice call through the data / voice server 200 even when the conventional wireless terminal as shown in Figs. 6A and 6B. Therefore, in this case, the voice data processing module 203 in the server 200 intervenes in the data path with both terminals, packetizes and exchanges the voice data received on the server 200, and then depackets the packet. The voice data is transmitted to the opposite terminal.

The voice call method of the mobile communication terminal and the method for providing the same according to the present invention having the configuration and operation as described above are connected to a web server that provides a data service through the mobile communication terminal, or the like. By using the mobile communication terminal, the multimedia service can be conveniently integrated through one call connection by allowing the user to make a voice call again without disconnecting the connected call.

Claims (17)

In the method for providing a voice call of a wireless terminal, A first step of receiving a call request from an originating radio terminal through a mobile communication network; A second step of transmitting data constituting information for inputting a telephone number of the opposite wireless terminal to be connected while connecting the call in response to the received call request; A third step of receiving an incoming telephone number input through the outgoing wireless terminal based on the transmitted information through a mobile communication network and requesting a call connection with the wireless terminal of the received telephone number; A fourth step of checking whether a call mode of the called wireless terminal supports a packet type call mode when a call connection is made with the called wireless terminal by the request; A fifth step of determining whether to perform packet conversion and inverse conversion thereof on voice data to be transmitted / received with the destination wireless terminal based on the confirmed supported call mode, and setting a processing path of data to be exchanged accordingly; And And a sixth step of making a voice call by transmitting the voice data received from the originating or terminating radio terminal to the counterpart wireless terminal by processing the data through the set processing path. The method of claim 1, The fourth step is a method for providing a voice call of the wireless terminal, characterized in that for transmitting the data requesting confirmation of the supported call mode to the terminating wireless terminal to confirm the call mode of the terminating wireless terminal from the response. The method of claim 2, In the fourth step, when it is determined that the called wireless terminal supports a packet type call mode, the voice of the wireless terminal is characterized by transmitting a command to set the call mode to the packet type. How to provide a call. The method of claim 1, In the fourth step, after the call connection is made with the terminating wireless terminal, if the data for the call mode is not received from the terminating wireless terminal within a predetermined time, it is determined that the call mode of the packet type is not supported. Voice call providing method of a wireless terminal. The method of claim 1, In the fifth step, if it is determined that the supported communication mode supports the packet type communication mode, a data path for not performing packet conversion and inverse conversion thereof on voice data to be transmitted and received with the destination wireless terminal is set. A voice call providing method of a wireless terminal. The method of claim 1, In the fifth step, if it is determined that the supported communication mode does not support a packet communication mode, a data path for performing packet conversion and inverse conversion thereof on voice data to be transmitted and received with the destination wireless terminal is set. A voice call providing method of a wireless terminal. The method of claim 1, In the third step, when the incoming telephone number is input, the terminal determines whether the calling radio terminal supports a packet type call mode, and converts a packet to data with the calling terminal according to the confirmed calling mode of the calling radio terminal. And determining whether to perform inverse transformation thereof, and setting a data processing path accordingly. The method of claim 1, The third step is to transmit the information indicating that the call signal is going to the receiving wireless terminal until the call connection with the incoming wireless terminal, the voice of the wireless terminal, characterized in that for transmitting to the calling wireless terminal How to provide a call. The method of claim 8, And the information indicating that the call signal is going is transmitted as data having a ring tone sound periodically at predetermined time intervals. The method of claim 1, In the third step, when the incoming telephone number is received through the mobile communication network, additional information is transmitted to the calling wireless terminal, and if a specific requirement is satisfied, the third terminal requests a call connection to the wireless terminal of the called telephone number. Voice call providing method of the wireless terminal. The method of claim 10, The specific requirement is that the call connection with the calling wireless terminal is maintained even after a predetermined time elapses after the provision of the additional information. The method of claim 1, The fourth step is to provide additional information to the terminating wireless terminal when a call connection is made with the terminating wireless terminal, and if the specific requirements are satisfied, checking whether the packet method is supported and following the fifth and sixth steps thereafter. Voice call providing method of a wireless terminal, characterized in that proceeding to. The method of claim 1, In the sixth step, while the voice call is made during the incoming and outgoing wireless terminal period, the wireless terminal making the call in a packet manner transmits additional information such as advertisement and muxing the packetized voice data together. Voice call providing method of a wireless terminal. In the call method of a wireless terminal, A first step of connecting to a server performing a data information provision and voice packet exchange function through a mobile communication network; A second step of performing information exchange for matching a call scheme with the call-connected server; A third step of additionally setting a process of packetization and depacketization in the channel coding and decoding path of real-time digital voice data according to the information exchange; And And a fourth step of converting the input voice into packet voice data and transmitting the packet voice data to the server and restoring the packet voice data received from the server to voice. Voice call method. The method of claim 14, In the first step, after the call connection with the server, the additional information provided from the server is decoded and output as a visual or audio message, and the output state is maintained for a predetermined time, and then the second step is performed. Voice call method of a wireless terminal, characterized in that proceeding to. The method of claim 14, In the second step, after checking whether the corresponding mode is supported for the packet mode call mode designation request from the server, the information exchange is performed by sending a response message accordingly. Voice call method. The method of claim 14, During the voice call of the fourth step, store the non-voice packet data received from the server in the storage means, and output the non-voice packet data stored in the storage means to the display window when the next call is attempted after the end of the current call. The voice call method of the wireless terminal, characterized in that it further comprises a fifth step.