KR101206956B1 - Methods for sending/receiving digital multimedia broadcasting data among mobile terminals using push-to-talk service - Google Patents

Abstract

 The present invention relates to a method for transmitting and receiving digital multimedia broadcasting data between mobile communication terminals using a push-to-talk service. The digital multimedia broadcasting (DMB) data transmission method according to the present invention includes a first step of receiving a receiver designation signal from a user during DMB data reproduction, and a receiver and push-to-talk; A second step of receiving a user's request signal for sharing DMB data using a PTT) service, a third step of setting a traffic channel for transmitting the DMB data in response to the request signal, and receiving the DMB data through the traffic channel. And a fourth step of packetizing and transmitting. In addition, the DMB data receiving method according to the present invention, when the traffic channel is set by the sender, the first step of receiving a request signal from the sender for sharing the DMB data with the user using a PTT service, and the traffic channel And a third step of receiving the packetized DMB data from the sender, and a third step of reproducing the DMB data. According to the present invention, by transmitting and receiving the packetized DMB data using the PTT service between the PTT service and the mobile terminal capable of DMB service, DMB data sharing between the mobile communication terminals becomes easier.

 PTT, DMB, mobile terminal, shared, traffic channel

Description

Method of transmitting and receiving digital multimedia broadcasting data between mobile communication terminals using push-to-talk service

1 is a block diagram showing a system for transmitting and receiving DMB data using a mobile communication terminal according to an embodiment of the present invention.

2 is a schematic block diagram illustrating a mobile communication terminal according to an embodiment of the present invention.

3 is a flowchart illustrating a process for transmitting DMB data using the mobile communication terminal of FIG. 2.

FIG. 4 is a flowchart illustrating a process for receiving DMB data using the mobile communication terminal of FIG. 2.

The present invention relates to a mobile communication terminal, and more particularly, to a method for transmitting and receiving DMB data using a PTT service between a push-to-talk (PTT) service and a mobile communication terminal capable of DMB service. It is about.

In general, a mobile communication terminal includes a cellular phone, a personal digital assistant (PDA), a personal communication service (PCS) phone, an IMT-2000 (International Mobile Telecommunication-2000) terminal, It refers to a device that is portable, such as a Global System for Mobile communication (GSM) terminal, and can use a communication service (eg, call or text message exchange).

In the early stages of development, these mobile communication terminals were merely means for exchanging currency or text. However, in recent years, the data communication speed has been greatly improved due to the development of mobile communication technology, and the wireless data communication service network has been established. Accordingly, the mobile communication terminal has a function of providing multimedia information, digital multimedia broadcasting (DMB), PTT service, and the like instead of simply performing a one-to-one voice call.

In this case, the PTT service refers to a service in which each individual in the group presses a transmit button and communicates with other participants in the group depending on a single frequency or a dedicated channel. In general, a telephone call is expensive because two callers share a transmission channel and a reception channel, while a PTT service communicates at a low cost because a plurality of participants in a group communicate while sharing one broadcast channel. There are features that can be done. In addition, group calls by three or more participants are possible.

In addition, the DMB service refers to a broadcasting service that digitally modulates various multimedia signals such as audio, video, and text and provides the same to a mobile communication terminal. At this time, DMB is a broadcast that provides a higher quality service, such as high-definition and high sound quality to users by replacing the existing analog broadcast. In other words, the DMB service has a feature that a user can watch / listen to various channels through a mobile communication terminal equipped with an omnidirectional receiving antenna on a plurality of channels.

On the other hand, due to the rapid development of the service technology, the user can perform a call at a low cost while moving at high speed, and it is possible to watch / listen to a clean digital broadcast without noise. Accordingly, there is a need for a method that can provide more convenience in using a mobile communication terminal by a user corresponding to the PTT service and the DMB service.

However, conventionally, a system in which all the functions provided in the mobile communication terminal, in particular, the PTT service and the DMB service, can be used in association with each other by each service subscriber is not implemented, and each service is used individually. For this reason, when one person in the group wants to share DMB data with another person in the group during DMB data playback, it is inconvenient to end DMB data playback and then perform a call to deliver DMB information. In addition, after performing a call, in order to replay DMB data, it is cumbersome to perform the initial process for DMB replay again.

Accordingly, an object of the present invention is to provide a method and system for transmitting and receiving DMB data that can easily share DMB data between mobile communication terminals using a PTT service.

In order to achieve the above object, the present invention provides a method for transmitting DMB data between mobile communication terminals using a PTT service,

The DMB data transmission method according to the present invention includes a first step of receiving a receiver designation signal from a user while playing DMB data, and a second step of receiving a user's request signal for sharing DMB data using a PTT service with a receiver. And a third step of setting a traffic channel for transmitting DMB data in response to the request signal, and a fourth step of transmitting DMB data over the traffic channel.

On the other hand, the present invention provides a method for receiving DMB data between mobile communication terminals using a PTT service.

DMB data receiving method according to the present invention, when the traffic channel is set by the sender, the first step of receiving a request signal from the sender for sharing the DMB data with the user using the PTT service, and the sender through the traffic channel And a third step of receiving DMB data from the third step and reproducing the DMB data.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings indicate like elements, and the following detailed description and the accompanying drawings will be described without departing from the spirit of the present invention.

1 is a block diagram showing a DMB data transmission and reception system using a mobile communication terminal according to an embodiment of the present invention.

1, a DMB data transmission / reception system according to an embodiment of the present invention includes a plurality of mobile communication terminals (eg, a transmitting terminal 100a and a receiving terminal 100b), a replication server 400, and a possibility determination server 500. ).

The plurality of mobile communication terminals 100a and 100b are capable of PTT service and DMB service, and have a PTT button.

The replication server 400 packetizes the DMB packet through a traffic channel set between the mobile communication terminals 100a and 100b in response to the pressing of the PTT button of the transmitting terminal 100a among the plurality of mobile communication terminals 100a and 100b. Send the data.

At this time, when there is more than one receiving terminal 100b for receiving DMB data, the replication server 400 copies the DMB data transmitted from the transmitting terminal 100a and transmits the same to each receiving terminal 100b.

Meanwhile, the replication server 400 may terminate the transmission of the DMB data when the transmitting terminal 100a releases the PTT button and releases the use of the PTT service. Alternatively, the replication server 400 may terminate the transmission of the DMB data when the receiving terminal 100b releases the use of the PTT service.

The possibility determination server 500 determines whether the reception terminal 100b can receive the DMB and confirms it to the transmission terminal 100a. In other words, the possibility determination server 500 determines whether or not the transmitting terminal 100a may transmit the DMB data to the receiving terminal 100b.

A configuration example of a mobile communication terminal capable of transmitting and receiving DMB data in such a DMB data transmission / reception system is shown in FIG. 2.

2 is a schematic block diagram illustrating a mobile communication terminal according to an embodiment of the present invention.

2, the mobile communication terminal 100 according to an embodiment of the present invention is a wireless communication unit 105, modem 110, audio processing unit 115, keypad unit 120, storage unit 125, the control unit 130, a DMB receiver 135, an image processor 140, and a display 145.

The wireless communication unit 105 performs a transmission / reception function of the corresponding data for wireless communication of the mobile communication terminal 100. The wireless communication unit 105 is composed of 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. In addition, the wireless communication unit 105 establishes a traffic channel for voice and data communication with the external communication device, and performs a short message transmission and reception with the external communication device.

The modem 110 includes a transmission module that encodes and modulates a signal for transmission through a wireless channel, and a reception module that demodulates and decodes a signal received through a wireless channel. The modem 110 processes packet data or the like or processes an audio signal such as voice.

The audio processor 115 may be configured as a codec, and the codec includes a data codec for processing packet data and an audio codec for processing an audio signal for processing an audio signal such as voice. The audio processor 115 converts a digital signal received at the wireless communication unit 105 into an analog signal through an audio codec and reproduces the same through a speaker SPK. In addition, the audio processor 115 converts an analog audio signal input from a microphone MIC into a digital audio signal through an audio codec and outputs the digital audio signal to the wireless communication unit 105.

The keypad 120 inputs a key signal according to a user's manipulation. To this end, the keypad 120 includes hardware buttons or soft buttons using a touch screen, and inputs a corresponding key signal to the controller 130 according to a user's manipulation. In this case, the keypad 120 preferably includes one button for inputting a user's manipulation signal for using the PTT service, for example, a PTT button.

The storage unit 125 stores information related to the operation of the mobile communication terminal 100, for example, a driving program for driving control of the mobile communication terminal 100, data related to the program, a phone book, an address book, and a short message. . In particular, the storage unit 125 stores PTT group information of the user of the mobile communication terminal 100.

The controller 130 performs a function of controlling the overall operation of the mobile communication terminal 100. The controller 130 controls the mobile communication terminal 100 based on a signal input through the keypad 120 or an operation program pre-stored in the storage unit 125. In particular, the controller 130 controls each unit of the mobile communication terminal 100 so that the mobile communication terminal 100 transmits and receives PTT data based on a user's manipulation signal input through the keypad 120.

Furthermore, the controller 130 controls each unit of the mobile communication terminal 100 so that the mobile communication terminal 100 transmits / receives DMB data using a PTT service based on a user's manipulation signal input through the keypad 120. do. For example, when the PTT button of the keypad 120 is pressed during DMB data reproduction, each unit is controlled to packetize DMB data being reproduced through a traffic channel set by the wireless communication unit 105 to transmit DMB data. Alternatively, when the traffic channel is established from the outside in the standby state, each unit is controlled to receive the packetized DMB data through the traffic channel.

The DMB receiving unit 135 receives the DMB data transmitted from a certain broadcasting center, separates the audio signal from the video signal, outputs the audio signal to the audio processing unit 115, decodes the video signal into an MPEG standard signal, and then processes the image processing unit. Control to output to 140.

The image processor 140 processes a video signal output from the DMB receiver 135 and user data output from the controller 130 while outputting the DMB data, and outputs the same to the corresponding area of the display unit 145.

The display unit 145 displays an image signal under the control of the controller 130.

3 is a flowchart illustrating a process for transmitting DMB data using the mobile communication terminal of FIG. 2. 2 and 3, a method of transmitting DMB data according to an embodiment of the present invention is as follows.

 First, when the DMB service request signal is input from the user in the standby state 205, the mobile communication terminal 100 receives and reproduces the DMB data in response to the request signal (210).

Next, during playback of the DMB data, the controller 130 confirms key input from the user through the keypad 120 (215). In addition, the controller 130 determines whether the key input is a receiver designated signal input (220). In this case, the receiver designation signal may be a telephone number of the receiver when there is only one receiver, and a shortcut number of a group to which the receiver belongs when there is more than one receiver.

Subsequently, as a result of the determination in this process, when the key input is a receiver designation signal input, the controller 130 determines whether the PTT button of the keypad 120 is pressed by the user (225). As a result of the determination, when the PTT button is pressed, the controller 130 controls the wireless communication unit 105 to establish a traffic channel between the receiver and the mobile communication terminal (230).

On the other hand, if the key input is not the receiver designation signal input, the controller 130 performs a function corresponding to the key input through the keypad unit 120 (222).

Subsequently, the control unit 130 transmits a signal for confirming whether the receiver side mobile communication terminal can receive the DMB data to be transmitted through the traffic channel (235). The controller 130 determines whether the DMB data can be received according to the signal received from the receiver-side mobile communication terminal (240). As a result, when the receiver-side mobile communication terminal can receive the DMB data, the controller 130 packetizes the DMB data and transmits the packetized DMB data through the traffic channel (245).

On the other hand, in this process 240, when the receiver side mobile communication terminal is unable to receive the DMB data or refuses to receive the DMB data, the controller 130 releases the use of the PTT service. That is, when the receiver side mobile communication terminal is set by the receiver so that the PTT service or the DMB service is not available or the DMB data reception using the PTT service is not possible, or when the receiver rejects the DMB data reception request, the controller 130 ) Releases the use of the PTT service.

Finally, during the transmission of the DMB data, the controller 130 determines whether an input of the release of the PTT button is generated from the user through the keypad 120 (250). As a result of determination, when a PTT button release input is generated from the user, the controller 130 terminates the transmission of the DMB data by releasing the use of the PTT service.

Meanwhile, in this process 250, when the PTT button release input does not occur, the controller 130 determines whether the use of the PTT service is released from the receiver (255). As a result of the determination, when the use of the PTT service is released from the receiver, the controller 130 ends transmission of the DMB data. In this case, when there are two or more recipients, the controller 130 terminates the transmission of the DMB data only to the receiver who has canceled the use of the PTT service, and continuously transmits the DMB data to the receiver who has not canceled the use of the PTT service.

FIG. 4 is a flowchart illustrating a process for receiving DMB data using the mobile communication terminal of FIG. 2. 2 and 4, a method of receiving DMB data according to an embodiment of the present invention is as follows.

First, the mobile communication terminal 100 operates in a standby state (305). That is, when no special operation is input from the user, the mobile communication terminal 100 operates in a standby state.

Next, in the standby state, the controller 130 determines whether the traffic channel is established through the wireless communication unit 105 (310). As a result of the determination, when the traffic channel is set, the controller 130 determines whether there is a DMB data reception request signal from the sender to transmit the DMB data (315). As a result of the determination, when there is a DMB data reception request signal from the sender, the controller 130 determines whether to receive the DMB data (320). In this case, the user may set whether or not the mobile communication terminal 100 may receive DMB data transmitted from the sender-side mobile communication terminal in advance, and the controller 130 may be configured according to a reception mode previously set by the user. It is determined whether DMB data is received.

Subsequently, when it is determined in step 320 that the DMB data is preset, the controller 130 receives the packetized DMB data transmitted from the sender through the traffic channel (325).

On the other hand, if it is preset not to receive the DMB data, the controller 130 inquires whether the user may receive the DMB data (322). In response to the user's response to the query, the controller 130 determines whether or not the DMB data may be received (324). As a result of determination, when the user allows the reception of the DMB data, the controller 130 receives the DMB data transmitted from the sender through the traffic channel (325). Or, if the user refuses to receive the DMB data, the controller 130 releases the use of the PTT service.

Subsequently, the controller 130 plays the received DMB data (330). In this case, the controller 130 may reproduce the DMB data as at least one of an image and a sound according to a user's setting. That is, the controller 130 receives the DMB data, divides the audio signal into an image signal, and then outputs the audio signal to the speaker SPK through the audio processor 115 and simultaneously outputs the image signal to the image processor 140. The display unit 145 may be output to the display unit 145, or only one signal of an audio signal or an image signal may be output to either the speaker SPK or the display unit 145.

Finally, during the reception and reproduction of the DMB data, the controller 130 determines whether the use of the PTT service is released from the sender (335). As a result of the determination, when the use of the PTT service is released from the sender, the controller 130 ends reproduction of the DMB data.

On the other hand, in this process (335), if the use of the PTT service is not released from the sender, the controller 130 determines whether the input of the use of the PTT service release from the user via the keypad 120 (340). ). As a result of the determination, when a PTT service use release input is generated from the user, the controller 130 releases the use of the PTT service and ends the reproduction of the DMB data.

Although specific embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications may be made by those skilled in the art without departing from the scope of the present invention.

Therefore, according to the present invention as described above, by transmitting and receiving the packetized DMB data using the PTT service between the PTT service and the DMB-enabled mobile communication terminal, DMB data sharing between the mobile communication terminals becomes easier. have.

Thus, in using a mobile communication terminal capable of PTT service and DMB service, it is possible to provide more convenience.

Claims (9)

In the method of transmitting digital multimedia broadcasting (DMB) data between mobile communication terminals using a push-to-talk (PTT) service, A first step of receiving a receiver designation signal from a user during DMB data reproduction; Receiving a request signal of a user for sharing the DMB data using a PTT service with a receiver corresponding to the receiver designation signal; Setting a traffic channel for transmitting the DMB data in response to the request signal; And And a fourth step of packetizing and transmitting the DMB data to the receiver through the traffic channel. The method of claim 1, And confirming whether or not the receiver can receive the DMB data through the traffic channel of the third step. The method of claim 1, Receiving a request signal of a user for releasing the use of the PTT service during the fourth step; And And terminating the fourth step in response to the request signal. The method of claim 1, And terminating the fourth step when the use of the PTT service is released from the receiver during the fourth step. In the method of receiving DMB data between mobile communication terminals using a PTT service, Receiving a request signal from the sender for sharing the DMB data using a PTT service with a user when a traffic channel is established by the sender; A second step of receiving the packetized DMB data from the sender over the traffic channel; And And a third step of reproducing the DMB data. 6. The method of claim 5, And determining whether to receive the DMB data in response to the request signal of the first step. The method of claim 5, wherein the third step, DMB data receiving method characterized in that for playing the DMB data to at least one of the image or the sound. 6. The method of claim 5, And terminating the third step when the use of the PTT service is released from the sender during the third step. 6. The method of claim 5, Receiving a request signal of a user for releasing the use of the PTT service during the third step; And And terminating the third step in response to the request signal.

Images