KR100654550B1 - Method of transmitting and downloading data using bit rate and web server and mobile communication terminal for same - Google Patents

Abstract

The present invention relates to a method for transmitting and downloading data using a bit rate, and a web server and a mobile communication terminal for the same, in particular, when the mobile terminal downloads data from the web server by a progressive download method, the bit The present invention relates to a method of transmitting and downloading data and to a web server and a mobile communication terminal for enabling a proper size of a buffer for temporarily storing and reproducing data using a rate.

To this end, the present invention is a wireless communication unit for performing wireless communication with a web server; A storage unit having a buffer for temporarily storing and reproducing data downloaded from the web server through an HTTP (hyper text transfer protocol) protocol; And a controller configured to parse the HTTP header of the downloaded data, extract a bit rate of the data, and set a size of the buffer according to the extracted bit rate.

Description

Method for sending and downloading data using bit rate and web server and mobile communication terminal for same {method for sending and downloading data using bit rate and web server and mobile phone for the same}

1 is a conceptual diagram of a data communication system according to an embodiment of the present invention.

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

3 is a block diagram of a web server according to an embodiment of the present invention.

4 is a flowchart illustrating a data transmission method of a mobile communication terminal according to an embodiment of the present invention.

5 is a flowchart illustrating a data transmission method of a web server according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: data communication system 100: mobile communication terminal

110: wireless communication unit 120: input unit

130: display unit 140: storage unit

150: control unit 200: Internet

300: web server

The present invention relates to a method for transmitting and downloading data using a bit rate, and a web server and a mobile communication terminal for the same, in particular, when the mobile terminal downloads data from the web server by a progressive download method, the bit The present invention relates to a method of transmitting and downloading data and to a web server and a mobile communication terminal for enabling a proper size of a buffer for temporarily storing and reproducing data using a rate.

Due to the rapid development of wireless communication technology and widespread use of mobile communication terminals, data stored in web servers connected to the Internet, such as video or music data, can also be downloaded and played through HTTP (hypertext transfer protocol) protocol through mobile communication terminals. It has become commercially available.

In particular, unlike a general download in which all data constituting one file is downloaded from a web server and then the downloaded file is played back, the data is downloaded to be stored as a file and the downloaded data is buffered at the same time. A progressive download method for reproducing the temporarily stored downloaded data is also used in the mobile communication terminal.

However, the HTTP header for transmitting data shows only the size of the file to be downloaded, and does not contain information about the bit rate indicating the speed at which the data is downloaded.

Accordingly, the conventional mobile communication terminal has a problem in that the buffer cannot be set to an appropriate size to reflect the data download speed. That is, there is a problem in that the size of the buffer is set too large to waste memory, or the size of the buffer is set too small to cause data overflow.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems, and when the mobile terminal downloads data from the web server by the progressive download method, it is possible to appropriately set the size of the buffer for temporarily storing and reproducing the data. have.

Another object of the present invention is to allow the mobile communication terminal to appropriately set a reference period for reproducing data downloaded to a buffer when data is downloaded from a web server by a progressive download method.

According to an aspect of the present invention for achieving the above object, a wireless communication unit for performing wireless communication with a web server; A storage unit having a buffer for temporarily storing and reproducing data downloaded from the web server through an HTTP (hyper text transfer protocol) protocol; And a controller configured to parse the HTTP header of the downloaded data, extract a bit rate of the data, and set a size of the buffer according to the extracted bit rate. .

Preferably, the controller sets a period of referring the buffer to reproduce the downloaded data according to the extracted bit rate.

More preferably the data is downloaded by a progressive donwload scheme.

According to another aspect of the present invention for achieving the above object, a data download step of downloading any data from the web server to the hyper text transfer protocol (HTTP) protocol through wireless communication; A bit rate extraction step of extracting a bit rate of the data by parsing the HTTP header of the downloaded data; And a buffer size setting step of setting a size of a buffer for downloading the data according to the extracted bit rate.

Preferably, after the buffer size setting step, a buffer reference period setting step of setting a period for referring to the buffer to reproduce the downloaded data according to the extracted bit rate;

More preferably the data is downloaded by a progressive donwload scheme.

According to another aspect of the present invention for achieving the above object, a communication unit for performing communication with the mobile communication terminal; In response to a request of the mobile communication terminal, data is transmitted to the mobile communication terminal using a hyper text transfer protocol (HTTP) protocol, and a bit rate of the data is recorded in an HTTP header and includes the bit rate. And a central processing unit for transmitting the HTTP header and the data.

According to another aspect of the present invention for achieving the above object, a recording step of recording a bit rate (bit rate) of data to be transmitted to a mobile communication terminal in a hyper text transfer protocol (HTTP) header; And a transmission step of transmitting the HTTP header and the data including the bit rate using an HTTP protocol.

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

1 is a conceptual diagram of a data communication system according to an embodiment of the present invention.

Referring to FIG. 1, a system 1 according to an embodiment of the present invention includes a mobile communication terminal 100, an internet 200, and a web server 300.

The mobile communication terminal 100 downloads data encrypted by a hyper text transfer protocol (HTTP) protocol from the web server 300 through the Internet 200 according to a user's request, and the HTTP header of the downloaded data. Parsing extracts the bit rate of the data.

The mobile communication terminal 100 sets a size of a buffer for temporarily storing and reproducing the downloaded data according to the extracted bit rate, that is, a buffer size, and sets the downloaded data according to the extracted bit rate. A period of referring to the buffer for reproducing, that is, a buffer reference period is set.

Thereafter, when the buffer having the set size is filled with the downloaded data, the mobile communication terminal 100 reproduces the downloaded data input to the buffer according to the set period.

Here, unlike the general download, in which the downloaded file is downloaded after all data constituting one file is downloaded, the download is performed to save the data as a file and simultaneously buffer the downloaded data to the buffer. Means a progressive download for reproducing the temporarily stored downloaded data or streaming that does not store the downloaded data.

The Internet 200 is a network for transmitting data using a TCP / IP protocol and interconnects the mobile communication terminal 100 and the web server 300. The mobile communication terminal 100 connects to the Internet 200 via an inter-working function (IWF) (not shown) which serves as a mobile communication network (not shown) and a network interworking device, and a technique related thereto is known. The description will be omitted below.

The web server 300 stores the data, and when there is a download request for the stored data from the mobile communication terminal 100 through the internet 200, the web server 300 stores the data through the internet 200. Transmission to the mobile communication terminal 100 using the HTTP protocol.

In particular, the web server 300 records the bit rate of the data to be transmitted in an HTTP header, and transmits the HTTP header and the data including the bit rate.

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

Referring to FIG. 2, the mobile communication terminal 100 according to an embodiment of the present invention uses the wireless communication unit 110, the input unit 120, the display unit 130, the storage unit 140, and the controller 150. Include.

The wireless communication unit 110 is controlled by the control unit 150, converts the signal output from the control unit 150 into a wireless signal, and converts the wireless signal received through an antenna (not shown) into a desired signal Output

In particular, the wireless communication unit 110 performs wireless communication with the web server 300, requests the web server 300 to download data according to a control signal of the controller 150, and transmits the requested data. It serves to download from the web server 300.

The input unit 120 includes a character key, a numeric key and various function keys, and generates a key input signal corresponding to a key input by a user and outputs the key input signal to the controller 150.

The display unit 130 is a display device, such as a liquid crystal display (LCD), and displays various images or text data according to a display function control signal of the controller 150.

The storage unit 140 is controlled by the control unit 150, and stores an operation program and a system program necessary for controlling the control unit 150, and flash for temporarily storing data generated while performing various operation programs. Flash memory (not shown).

In particular, the storage 140 has a buffer for temporarily storing and reproducing data downloaded from the web server through the wireless communication unit 110 through the HTTP protocol.

The controller 150 controls the overall operation of the mobile communication terminal 100, and in particular, receives data encrypted by the HTTP protocol from the web server 300 through the Internet 200 in response to a user's request, The HTTP header of the downloaded data is parsed to extract the bit rate of the data.

The controller 150 sets a size of a buffer for temporarily storing and reproducing the downloaded data according to the extracted bit rate, that is, a buffer size, and reproduces the downloaded data according to the extracted bit rate. For example, the buffer reference period, that is, the buffer reference period is set.

Thereafter, when the buffer having the set size is filled with the downloaded data, the controller 150 reproduces the downloaded data input to the buffer according to the set period.

3 is a block diagram of a web server according to an embodiment of the present invention.

Referring to FIG. 3, the web server 300 according to an embodiment of the present invention includes a communication unit 310, a storage unit 320, and a central processing unit 330.

The communication unit 310 is controlled by the central processing unit 330, and transmits and receives a data signal for transmitting and receiving data to communicate with the mobile communication terminal 100.

The storage unit 320 stores an operation program and a system program necessary for controlling the central processing unit 330 and a bit rate indicating a speed at which the data and the data are transmitted to the mobile communication terminal 100. do.

The central processing unit 330 controls the overall operation of the web server 300, and transmits data to the mobile communication terminal 100 using the HTTP protocol at the request of the mobile communication terminal 100. To this end, the central processing unit 330 records the bit rate of the data in the HTTP header, and transmits the HTTP header and the data including the bit rate to the mobile communication terminal 100.

4 is a flowchart illustrating a data transmission method of a mobile communication terminal using a bit rate according to an embodiment of the present invention.

Referring to FIG. 4, the controller 150 of the mobile communication terminal 100 according to an embodiment of the present invention encrypts HTTP data including data, for example, video data, that is, an HTTP protocol for transmission. Downloaded data is downloaded from the web server 300 through the Internet 200 (S100).

Thereafter, the controller 150 parses the HTTP header of the downloaded HTTP data and extracts a bit rate indicating the speed at which the data is downloaded (S110).

Thereafter, the controller 150 sets a buffer, that is, the size of the buffer for temporarily storing and re-downloading the downloaded data according to the extracted bit rate (S120).

For example, if the extracted bit rate is 128 kps and you want to temporarily store 3 seconds of data in the buffer, the size of the buffer is set to 3 * 128 = 384 bits.

Thereafter, the controller 150 stores the downloaded video data in the buffer (S130).

Thereafter, the controller 150 determines whether the buffer is full (S140).

As a result of the determination of step S140, when the buffer is full, the controller 150 plays the stored video data according to the extracted bit rate (S150) and ends the procedure.

That is, the controller 150 determines an additional buffer reference period according to the extracted bit rate, and accordingly plays the moving picture data stored in the buffer.

For example, when the extracted bit rate is 128 kbps, the controller 150 reads data stored in the buffer every 1/128 seconds and reproduces the data.

Even during playback of the video data, the data downloaded from the web server 300 is input to the buffer for playback until the download is completed.

On the other hand, when the determination result of the step S140, when the buffer is not full, the controller 150 downloads the HTTP data including the video data from the web server 300 (S160) and moves to step S130.

5 is a flowchart illustrating a data transmission method of a web server using a bit rate according to an embodiment of the present invention.

Referring to FIG. 5, the central processing unit 330 of the web server 300 according to an exemplary embodiment receives a request for downloading data, for example, video data from the mobile communication terminal 100 (S200). .

Thereafter, the central processing unit 330 records a preset bit rate indicating the speed at which the data is transmitted to the mobile communication terminal 100 in the HTTP header (S210).

For example, the central processing unit 330 records "Content: = Audio / 3gp; Bit = 128" in the HTTP header. Here, Content indicates that the content is about the type of data, Audio / 3gp indicates that the data is audio data, in particular, 3gp type sound source data, and Bit indicates a bit rate.

Thereafter, the central processing unit 330 transmits the video HTTP data having the HTTP header recorded with the bit rate, that is, the data encrypted according to the HTTP protocol to the mobile communication terminal 100 (S220). End the procedure.

Although the present invention has been described based on a constant bit rate (CBR) having a constant bit rate, the present invention can be applied to a variable bit rate (VBR) in which the bit rate changes. For example, the buffer may be set to have a size corresponding to twice the average bit rate recorded in the HTTP header.

The present invention is not limited to the above described embodiments, and various modifications and changes can be made by those skilled in the art, which are included in the spirit and scope of the present invention as defined in the appended claims.

According to the present invention as described above, when the mobile communication terminal downloads data from the web server by the progressive download method, the size of the buffer for temporarily storing and reproducing the data is appropriately set using the bit rate extracted from the HTTP header. Therefore, there is an effect that can effectively prevent the overflow of data due to memory waste or insufficient buffer due to the excessive buffer setting.

Further, according to the present invention as described above, when the mobile communication terminal downloads data from the web server by the progressive download method, it is appropriate to refer to the period to extract the bit rate from the HTTP header to play the data downloaded to the buffer There are also effects that can be set.

Claims (8)

A wireless communication unit performing wireless communication with a web server; A storage unit having a buffer for temporarily storing and reproducing data downloaded from the web server through an HTTP (hyper text transfer protocol) protocol; A controller configured to parse the HTTP header of the downloaded data, extract a bit rate of the data, and set a size of the buffer according to the extracted bit rate; Mobile communication terminal comprising a. The mobile communication terminal of claim 1, wherein the controller sets a period for referring to the buffer to reproduce the downloaded data according to the extracted bit rate. The mobile communication terminal of claim 1, wherein the data is downloaded by a progressive donwload method. A data download step of downloading arbitrary data from a web server to a hyper text transfer protocol (HTTP) protocol through wireless communication; A bit rate extraction step of extracting a bit rate of the data by parsing the HTTP header of the downloaded data; A buffer size setting step of setting a size of a buffer for downloading the data according to the extracted bit rate; Data download method of a mobile communication terminal using a bit rate, characterized in that it comprises a. The method of claim 4, further comprising, after the buffer size setting step, setting a period of referring to the buffer to reproduce the downloaded data according to the extracted bit rate; The data download method of the mobile communication terminal using a bit rate, characterized in that it further comprises. The method of claim 4, wherein the data is downloaded by a progressive donwload method. Communication unit for performing communication with the mobile communication terminal; In response to a request from the mobile communication terminal, data is transmitted to the mobile communication terminal using a hyper text transfer protocol (HTTP) protocol, wherein the bit rate of the data is recorded in an HTTP header and includes the bit rate. A central processor for transmitting an HTTP header and the data; Web server comprising a. A recording step of recording a bit rate of data to be transmitted to a mobile communication terminal in a hyper text transfer protocol (HTTP) header; A transmission step of transmitting the HTTP header and the data including the bit rate using an HTTP protocol; Data transmission method of the web server using a bit rate, characterized in that it comprises a.

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