KR20060011640A - Method for saving and playing matter of conversation by telephone in the push to talk portable terminal - Google Patents

Abstract

The present invention relates to wireless communication, and more particularly, to a method for storing and playing back a PTT call content for automatically storing a voice received when a PTT call is requested in a standby state when using a Push-To-Talk (PTT) service. To this end, the present invention provides a method for storing and reproducing PTT call contents of a called PTT portable terminal capable of Push-To-Talk (PTT) service, storing a caller's voice received along with a PTT call request received at the called party's side. Setting a mode; Determining whether the call storage mode is set in the standby mode, and if the call storage mode is set, storing the received voice; When the call details playback key is input, the call contents of the stored voice are reproduced.

PTT handheld terminal, PTT (push-to-talk), notification, PTT notification sound, save call contents

Description

METHOD FOR SAVING AND PLAYING MATTER OF CONVERSATION BY TELEPHONE IN THE PUSH TO TALK PORTABLE TERMINAL}             

1 is a flow chart showing a general initial PTT call processing process.

Figure 2 is a diagram showing the configuration of a PTT portable terminal according to an embodiment of the present invention.

3 is a flowchart illustrating a method for storing and playing back PTT call contents according to an exemplary embodiment of the present invention.

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

10: control unit 21: RF unit

23: modem 25: audio processor

27: keypad 29: memory

80: display unit ANT: antenna

MIC: Microphone SPK: Speaker

The present invention relates to wireless communication, and more particularly, to a method for storing and playing back a PTT call content for automatically storing a voice received when a PTT call is requested in a standby state when using a Push-To-Talk (PTT) service.

In general, a wireless communication system of a mobile terminal divides an entire service area into a plurality of base station (BS) areas and configures cells, which are small service areas, and base stations are mobile switching centers (MSCs). Centralized control allows subscribers to make calls while moving from cell to cell.

In the portable terminal, as the communication technology develops, various technologies for combining an IP (Internet Protocol) network and a wireless communication network using an Internet-based protocol have been developed. One such technology is called VoIP (Voice over IP), a packet-based voice service using IP.

The packet-based call service according to the prior art, which operates as described above, has a disadvantage in that call setup time is relatively long because a call must be established through a mobile communication network and an IP network. In order to solve this disadvantage, it is possible to provide interactive call services such as a group call and a private call by using the multicast function of the IP network. In this case, the interactive call service is a kind of call in which calls are made by mutual interactions of users. For example, PTT (Pust to talk, or " PTT ") as in Walkie-talkie. There is a function. In addition, a group call means a multi-party call between users in a predetermined group of users, and a personal call means a 1: 1 call between users in a predetermined group of users.

The PTT service is a service that enables voice / data services simultaneously for a plurality of users or groups. By pressing a button for the PTT, the PTT service indicates that the user wants to speak, and the user device, that is, the portable PTT service is available. The terminal (hereinafter referred to as "PTT portable terminal") sends a service request to the network. The network rejects the request or allocates the requested resource based on predetermined criteria such as availability of resources, priority of the requesting user, and the like. At the same time, a connection is established with all other active users in a particular subscriber group. After the voice connection is established, the requesting user can speak, and other users can listen on the channel. When the user releases the PTT, the portable terminal releasing the PTT sends a release message signal to the network, and resources are released. The PTT communication system is capable of point-to-point and point-to-multipoint communication services. Here, the point-to-multipoint communication service is called a PTT group call in the PTT service.

The PTT call between the PTT portable terminals starts from the calling PTT portable terminal requesting the PTT call to the called party's PTT portable terminal. The PTT call request is made possible by pressing the PTT button. Then, the called-party PTT portable terminal notifies that the PTT call has been received by the PTT notification sound. Accordingly, the user of the called party's PTT portable terminal recognizes the PTT notification sound to notify the PTT call reception, and initiates the PTT call with the caller of the calling PTT portable terminal.

However, the PTT service through the conventional PTT portable terminal does not store the PTT call request and input voice received by the receiving PTT portable terminal when the receiver is not in a hurry or does not carry the PTT portable terminal at all times. It was a situation that could only provide a service that simply displays the information of the PTT call caller. Therefore, the receiver has a problem in which the sender cannot know why the PTT call is requested.

Accordingly, the present invention has been made to solve the above problems, and when using the Push-To-Talk (PTT) service, the method for storing and playing PTT call contents to automatically store the received voice when PTT call request in the standby state The purpose is to provide.

It is also an object of the present invention to provide a method for storing and reproducing PTT call contents, which enables to play a stored voice of a caller requesting a PTT call in a standby state of a PTT service.

In order to achieve the above object, the present invention provides a method for storing and reproducing PTT call contents of a called PTT portable terminal capable of Push-To-Talk (PTT) service. Setting a call storage mode for storing the voice of the voice; Determining whether a call storage mode is set in the standby mode, and if the call storage mode is set, storing the received voice; When the call details playback key is input, the call contents of the stored voice are reproduced.

According to the present invention for this purpose, when the called-party PTT portable terminal requests a PTT call in the PTT call standby mode (dormant), the incoming caller's voice is stored as the call contents, and the stored call contents are subsequently reproduced by the caller. You can check the intention of requesting PTT call.

A brief description of the PTT call processing process is as follows.

1 is a flowchart illustrating a general initial PTT call processing process, in which the calling PTT portable terminal 100 and the called PTT portable terminal 200 perform the first and second base stations 400 and 500 and service option nego from step 111 to 145, respectively. After the traffic channel (TCH) is set up, a voice call is performed to the PTT application based on the SIP.

First, in step 111, the calling PTT portable terminal 100 transmits a PTT call request signal (INVITE) to the first base station 400 in the form of a short data burst (SDB). Immediately after the PTT call request signal (INVITE) is transmitted, in step 113, the originating PTT portable terminal 100 performs a service option (SO_PTT) negotiation with a first base station 400 for a PTT service while providing a traffic channel (Traffic Channel). Perform setup. Here, the Nego is referred to as "Origination" as a process of preparing a higher network session from the physical layer to the application layer including the PPP session (session).

Thereafter, in steps 115 to 117, the PTT call request signal INVITE is transmitted to the first base station 400, and then to the second base station 500 where the PTT server 300 and the destination PTT portable terminal 200 are serviced. In this case, in steps 119 and 121, the second base station 500 periodically sends a paging signal (General Page) to the called PTT portable terminal 200, and the called PTT portable terminal 200 responds to the paging signal. Response) is being transmitted to the second base station 500. During the paging, in step 117, the second base station transmits the PTT call request signal (INVITE) in the form of a short data burst (SDB) to the called PTT portable terminal 200. Then, the called party PTT portable terminal 200 indicates that the PTT call has been formed and informs the called party. However, since the called PTT portable terminal 200 is not in a traffic channel setup state, no voice is transmitted to the calling PTT portable terminal 100.

Next, in step 125, the called-party PTT portable terminal 100 transmits "MS L2 Ack" to the second base station 500 as a signal indicating that the PTT call request signal INVITE is normally received by the second base station 500. Then, in step 127, the second base station 500 transmits a "BS L2 Ack" signal to the called party PTT portable terminal 200 indicating that the "MS L2 Ack" signal has been normally received to the called party PTT portable terminal 200.

Thereafter, in step 129, the called-party PTT portable terminal 200 transmits a “200 OK” message to the second base station 500 in the SDB form. Here, the "200 OK" message is a message indicating that the called PTT portable terminal has accepted the PTT call request signal (INVITE) to the calling PTT portable terminal requesting the initial PTT call.

In this case, immediately after the called-party PTT portable terminal 200 sends the "200 OK" message in step 131, the service is connected to the second base station 500 to perform a service option (SO_PTT) negotiation for a PTT service. Perform channel setup.

Next, during steps 133 to 137, the "200 OK" message is transmitted from the second base station 500 to the calling PTT portable terminal 100 through the PTT server 300 and the first base station 400, and receives the "200 OK" message. The calling PTT portable terminal 100 completes the traffic channel setup. Then, the calling PTT portable terminal 100 accepts the PTT call request from the called party and indicates that a PTT call is formed.

Subsequently, in step 139 and step 141, the calling PTT portable terminal 100 performs a step 143 after requesting a talk right to the PTT server 300 through a "SIP Ack" signal while the session is connected. The PTT server 300 controls the talk right request and gives a talk right to the calling PTT portable terminal.

In step 143, the calling-side PTT portable terminal 100 having obtained the right to speak transmits a talk burst to the PTT server 300 in real time through a Real Time Protocol (RTP). Then, the content spoken by the calling PTT portable terminal 100 in step 143 is transmitted to the PTT server 300 to be primarily buffered. Thereafter, the talk burst of the called PTT portable terminal 200 buffered in the PTT server 300 is determined by the called PTT server at the PTT server through RTP depending on whether the traffic channel setup of the called PTT portable terminal 200 is completed. PTT is transmitted to the portable terminal 200. That is, the PTT server 300 transmits the buffered speech contents after the traffic channel setup of the called-party PTT portable terminal 200 is completed.

Thereafter, the calling PTT portable terminal 100 and the called PTT portable terminal 200 do not need to negotiate with the PTT server 300 according to the completion of the traffic channel set-up, so that the above-mentioned " SIP Ack " signal and the " SIP Ack " You can speak with "SIP Respone" only.

Meanwhile, the called-party PTT portable terminal 200 according to the present invention may store the contents of a call in the memory area of the called-party PTT portable terminal 200 in the process of receiving a caller's voice after receiving the PTT call request signal of the calling-party PTT portable terminal 100. have.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It should be noted that in the following description, only parts necessary for understanding the operation and operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

In the following description, in describing a method for storing PTT call contents according to the present invention, specific details are shown to provide a more general understanding of the present invention. It will be apparent to those skilled in the art that the present invention can be easily implemented by these modifications.

2 is a diagram illustrating a configuration of a PTT portable terminal according to an embodiment of the present invention. Here, the PTT portable terminal may be a PTT portable telephone, which will be described later in the called party PTT portable telephone institution that automatically stores the caller's contents.

Referring to FIG. 2, the RF unit 21 performs communication of the portable terminal. The RF unit 21 includes an RF transmitter for upconverting and amplifying a frequency of a transmitted signal, and an RF receiver for low noise amplifying and downconverting a received signal.

The modem 23 includes a transmitter for encoding and modulating the transmitted signal and a receiver for demodulating and decoding the received signal. That is, the modem 23 processes packet data or the like or audio signals such as voice.

The audio processor 25 receives the received audio signal output from the modem 23 from the controller 10, converts the received audio signal into an audible sound through the speaker SPK, and outputs the audio signal input from the microphone MIC to the controller 10. The audio processor 25 converts the call content or PTT notification sound stored in the memory 29 into an audible sound from the controller 10 according to the PTT call storage mode.

The keypad 27 is provided with keys for inputting numeric and text information and function keys for setting various functions. In addition, the keypad 27 may set a call storage mode according to an exemplary embodiment of the present invention, and may include function keys for reproducing stored call contents through the call storage mode. For example, a PTT call storage mode key for setting or releasing a call storage mode with a single key press, and a call content playing key for reproducing a stored call content with a single key input through the call storage mode. It can be provided.

The memory 29 may be composed of program memory and data memories. The program memory stores programs for controlling a general operation of the PTT portable terminal. In addition, the program memory stores a program for outputting a PTT notification sound for notifying when a PTT call is received. In addition, programs for setting the call storage mode are stored. In addition, programs for reproducing call contents for reproducing stored call contents through the call storage mode are stored.

In addition, the data memory temporarily stores data generated during the execution of the programs. In addition, the voice of the caller received according to the call storage mode setting is dataized in the data memory and stored as a call content. In addition, the call contents are stored and caller information is stored. Here, the caller information may be a caller's telephone number, a time of receiving a caller's PTT call, and the like. The data memory is registered and stored in the call contents storage list including the call contents and caller information.

The controller 10 performs a function of controlling the overall operation of the PTT portable terminal. In addition, the controller 10 may include a modem 23. In addition, when the PTT call is received, the controller 10 transmits audio data corresponding to the notification sound when the PTT call is received to the audio processor 25. In addition, the controller 10 controls the overall operation according to the call storage mode setting. In addition, according to the call storage mode, the contents of the call are stored in the memory 29 and the selected call contents are stored in the call contents storage list in which the call contents are stored. do.

The display unit 80 displays messages generated during program execution under the control of the controller 10 and displays user data output from the controller 10. Here, the user data means icons indicating the remaining battery capacity, reception sensitivity rate, and the presence of a wake-up call, and the current time. In addition, the display unit 80 displays a message indicating whether the call storage mode is set when the call storage mode is set. At this time, when the call storage mode is set, the message "PTT call storage mode is set" is displayed. Thereafter, an icon indicating whether the call storage mode is set is displayed. In addition, the display unit 80 displays a call contents storage list of call contents stored through the call storage mode. In addition, the corresponding caller information of the selected call contents in the call contents storage list is displayed. The display unit 80 may use an LCD. In this case, the display unit 80 may include an LCD controller, a memory capable of storing image data, and an LCD display device. In this case, when the LCD is implemented in a touch screen manner, the keypad 27 and the LCD may be input units.

Looking at the operation of the PTT portable terminal of FIG. 1 described above, when the user performs a dialing operation through the keypad 27 during transmission, and sets the transmission mode, the controller 10 detects this and dial information received through the modem 23. After processing the RF signal through the RF unit 21 to output. After the counter subscriber generates a response signal, it detects it through the RF unit 21 and the modem 23. Thereafter, a user establishes a voice call path through the audio processor 25 to perform a communication function. In addition, in the incoming mode, the controller 10 detects the incoming mode through the modem 23 and generates a ring signal through the audio processor 25. Thereafter, when the user responds, the controller 10 detects this, and a voice call path is formed through the audio processor 25 to perform a communication function. In the outgoing and incoming modes, voice communication is described as an example, but a data communication function for communicating packet data and image data in addition to the voice communication may be performed. In addition, when performing a standby mode or text communication, the controller 10 displays text data processed through the modem 23 on the display 35.

Looking at the operation according to the storage of the call contents of the PTT portable terminal as follows.

First, in the PTT call standby mode, the controller 10 receives the caller's voice signal together with the PTT call request signal and stores the received voice signal in the memory 29 according to whether the call storage mode is set. As described above, the call storage mode can be set through the operation of the PTT call storage mode key provided in the keypad 27, and is displayed on the display unit 80 when the call storage mode is set. If the voice is not received for a predetermined time while the voice signal is stored in the memory 29, the controller 10 ends the storage of the call contents.

Thereafter, when the call content playing key input of the keypad 27 occurs, the controller 10 displays the call contents storage list on the display unit 80 and reads out the selected call contents from the memory contents storage list 29 from the memory 29. Then, the audio processor 25 receives the contents of the call read from the memory 29 from the controller 10, processes the data, converts the data to an audible sound, and plays the contents of the call through the speaker SPK.

3 is a flowchart illustrating a method of storing and playing back a PTT call content according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the control unit 10 is supplied with the power of the PTT portable terminal in step 311 to perform an overall initialization operation of the portable terminal, and then enters a standby mode waiting for key input or general call reception and PTT call reception. do.

The controller 10 sets a call storage mode in step 313. At this time, the call storage mode setting may be made through the PTT call storage mode key, and the call storage mode release may also be made by the PTT call storage mode key.

Thereafter, the controller 10 determines whether the caller's voice is received after receiving the PTT call request signal in step 315, and after receiving the PTT call request signal, proceeds to step 317 if the caller's voice is received. Check.

Thus, if the call storage mode is not set, the controller 10 stores only the caller information in the memory 29 in step 319, so that the caller cannot know why the caller requested the PTT call.

However, if the call storage mode is set, the controller 10 stores the voice received in step 321 in the memory 29. Thereafter, the controller 10 determines whether there is a voice received periodically in step 323, and if the received voice is detected, the controller 10 continuously stores the call by performing step 321. However, if the received voice is not detected, the voice storage is terminated in step 325 and the standby mode is entered.

Next, the controller 10 determines whether a call content play key input has occurred in step 327. If the call content play key input occurs, the controller 10 proceeds to step 329 and displays the call content storage list on the display 80. Then, the controller 10 enters the call contents storage list selection wait so that the called party can select the call contents storage list.

Thereafter, the controller 10 reads out the corresponding call selected by the called party from the memory 29 in step 331 and plays the call through the speaker SPK. Then, the called party can check whether the sender of the received PTT call and the sender requested the PTT call in a specific situation in which he / she is absent or cannot respond to the PTT call request signal.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described in detail above, the present invention provides a call of a caller requesting a PTT call when the called party of the PTT portable terminal is absent or is located at a distance separated from each other to determine whether a specific situation or a PTT call is requested to the PTT portable terminal. By automatically saving the contents and allowing the stored call contents to be reproduced later, the caller who requested the PTT call can check the reason for requesting the PTT call.

Claims (7)

In the PTT call content storage and playback method of the called PTT portable terminal capable of Push-To-Talk (PTT) service, Setting a call storage mode for storing a voice of a caller received with a PTT call request received at a called party; Determining whether the call storage mode is set in the standby mode, and if the call storage mode is set, storing the received voice; And reproducing the contents of the call of the stored voice when inputting the contents of the call. The method of claim 1, wherein the playing of the call content comprises: displaying a call history storage list of a caller; Detecting selected call contents in the call history storage list; And reading out the detected call contents. The method as claimed in claim 1, wherein the voice storage is terminated when there is no voice received for a predetermined time. 2. The method as claimed in claim 1, wherein the call storage mode is set by a specific shortcut key that allows the called party to store the contents of the call. The method as claimed in claim 1, wherein if the call storage mode is set, caller information is stored as a voice received. The method as claimed in claim 5, wherein the caller information is a caller's telephone number and time information of receiving a caller's PTT call. The method as claimed in claim 1, wherein only the caller information is stored unless the call storage mode is set.

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