KR20120110687A

KR20120110687A - System and method for the error control in internet uni-directional data broadcasting

Info

Publication number: KR20120110687A
Application number: KR1020110028714A
Authority: KR
Inventors: 오종택
Original assignee: 오종택
Priority date: 2011-03-30
Filing date: 2011-03-30
Publication date: 2012-10-10

Abstract

PURPOSE: An error control system in an Internet uni-directional data broadcast and a method thereof are provided to minimize an error rate of a broadcast data frame received from a receiver when errors occur during a broadcast data transmitting process. CONSTITUTION: An Internet uni-directional broadcast data server(300) partitions the entire Internet uni-directional broadcast data segment. The server transmits the partitioned frame or the same Internet uni-directional broadcast data frame several times. An Internet uni-directional broadcast data receiver(320) configures all Internet uni-directional broadcast data segments by combining frames which do not have errors among one or more Internet uni-directional broadcast data frames which are received from the broadcast data server. [Reference numerals] (301,325) Control unit; (302,321) Wireless transmitting module; (303,322) Internet module UDP/IP; (304,323) Broadcasting data storage unit; (305) Broadcasting data generating unit; (324) Broadcasting data playing unit

Description

System and method for the error control in Internet uni-directional data broadcasting}

The present invention is to reduce the error rate of the data frame and to compensate for the error at low cost when an error occurs during the transmission of the broadcast data in the Internet unidirectional data broadcasting system. By dividing the transmission frame into smaller broadcast frames, the frame error rate is reduced, and the same Internet broadcast data frame is transmitted several times, thereby combining the broadcast data frames without errors in the receiver to configure the entire broadcast data segment. The present invention relates to a method and a system for controlling an error by requesting a re-broadcast to a broadcast server through an internet unidirectional transmission method for a generated broadcast data frame.

Data broadcasting services on the Internet are very active. The current Internet broadcasting method mainly uses the TCP / IP protocol, and all Internet broadcasting receivers connect to the Internet broadcasting server one-to-one to request and receive the same broadcasting data. When an error occurs, the Internet broadcasting receiver requests retransmission to the broadcasting server and receives again. That's the way it is. In other words, unicasting is used to connect receiver and broadcasting server in one-to-one method of internet data transmission method. Another method is to use the multicasting technique of the Internet such as IPTV. In this case, the broadcast server is effective in transmitting the broadcast data only once to the multiple routers to which the receivers are connected, but an error occurs in the broadcast data received at the receiver. In this case, there is a disadvantage in that retransmission of the same broadcast data cannot be requested. On the other hand, a technique for broadcasting different data for each region by combining internet unicasting and broadcasting techniques has been developed. In this method, there is no solution if there is an error in the received broadcasting data.

As described in the background art, when an error occurs in the received broadcast data in the receiver only when the unicasting technique is used in the current data broadcasting technique using the Internet, the receiver may request the broadcast server to retransmit the broadcast data. In the unicasting technique, since all receivers are connected to the broadcast server one-to-one and transmit the same broadcast data to all receivers, a serious problem occurs that the broadcast server is very overloaded and excessively generates communication traffic. In order to overcome this problem, Internet broadcasting technology using multicasting has been commercialized. However, in this case, since a one-way transmission from the broadcasting server to the receiver such as UDP (User Datagram Protocol) is used, an error occurs in the broadcast data frame received at the receiver. If so, the broadcast server cannot request retransmission of the same broadcast data frame. Therefore, in the case of using a one-way Internet protocol such as UDP, there is no way to recover the error if the received broadcast data error.

The present invention has been proposed to solve the above problems, in the Internet unidirectional data broadcasting system, to reduce the error rate of the data frame when the error occurs during broadcast data transmission and to compensate for the error at a low cost, the entire Internet It is possible to reduce the frame error rate by dividing the unidirectional data broadcast data segment into smaller broadcast frames and to transmit the same internet broadcast data frame several times. It is also an object to control the error by selectively re-broadcasting to the broadcast server in the Internet unidirectional transmission method for the broadcast data frame in which the error occurs in the receiver.

For example, when transmitting data to a receiver in an internet unidirectional data broadcasting system, an error bit is very likely to occur when transmitting data in one large broadcast data segment, especially in wireless communication such as wireless LAN or mobile communication. In this case, the receiver recognizes that an error bit is included in the segment by using an error detection code such as a CRC code included in the broadcast data segment and discards the segment. According to the present invention, the entire broadcast data segment is divided into smaller broadcast data frames and transmitted. In this case, the probability that error bits are included in the frame received by the receiver is unlikely to increase the probability of successful broadcast data reception. In addition, in the present invention, when the broadcast server transmits the broadcast data frame, the same broadcast data frame is transmitted several times, and if there is an error-free frame among the broadcast data frames received by the receiver, only the corresponding frame is received and combined. The entire broadcast data segment can be constructed successfully. Also, in this process, the error rate of the broadcast data frame received by the receiver is transmitted to the broadcast server by using an internet unidirectional data transmission technique such as UDP, so that the broadcast server can determine the optimal broadcast data frame size or the same number of broadcast data frame transmissions. To help.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

The system of the present invention for achieving the above object is, in the error control system in the Internet unidirectional data broadcast, the whole Internet unidirectional broadcast data segment is divided into small Internet unidirectional broadcast data frame and transmitted or the same Internet unidirectional broadcast data frame Internet one-way broadcast data server for transmitting a number of times; And an internet unidirectional broadcast data receiver constituting a whole internet unidirectional broadcast data segment by combining frames including no error in one or a plurality of internet unidirectional broadcast data frames received from the broadcast data server.

On the other hand, the method of the present invention, in the error control method in the Internet one-way data broadcasting, the Internet one-way broadcast data server splits the entire Internet one-way broadcast data segment into smaller Internet one-way broadcast data frame or transmit the same Internet one-way broadcast Transmitting the data frame several times; And constructing an entire Internet unidirectional broadcast data segment by combining frames, which do not contain an error, in one or a plurality of Internet unidirectional broadcast data frames received from the broadcast data server in an internet unidirectional broadcast data receiver. do.

The present invention as described above, when an error occurs in the process of transmitting broadcast data in the Internet unidirectional data broadcasting system, minimizes the error rate of the broadcast data frame received by the receiver and can overcome this even when a frame error occurs There is.

1 is an example of an error control system block diagram in internet unidirectional data broadcasting according to the spirit of the present invention;

1 is an example of a block diagram of an error control system in internet unidirectional data broadcasting according to the spirit of the present invention, and includes an internet unidirectional broadcast data server 300 and an internet unidirectional broadcast data receiver 320.

The Internet unidirectional broadcast data server 300 configures all broadcast data segments to be transmitted by the broadcast data generator 305 under the control of the controller 301, and the segments are broadcast data of optimal size in the broadcast data storage 304. It is divided into frames and stored. These broadcast data frames perform one-way or one-time Internet transmission to the receiver via an internet module 303 such as UDP / IP. At this time, it may be transmitted to the receiver 320 through a wireless transmission module 302 such as a wireless LAN or a mobile communication method, or may be transmitted in a wired manner.

The Internet unidirectional broadcast data receiver 320 receives the Internet unidirectional broadcast data frames from the server 300 through the wireless transmission module 321 and the internet module 322 under the control of the controller 325, and an error occurs during the received frame. The broadcast data frame not included is selected and stored in the data storage unit 323 to finally form the entire broadcast data segment. The broadcast data reproducing unit 324 reproduces this segment.

In addition, the receiver 320 may report the error rate of the received broadcast data frame to the server 300 by using an internet unidirectional transmission method such as UDP / IP, and the server 300 analyzes this and the server 300 The size of the broadcast data frame to be transmitted may be determined, or the number of times the server 300 transmits the same broadcast data frame may be determined.

In addition, when an error is included in the received broadcast data frame, the receiver 320 may request the server 300 to retransmit the frame using an internet unidirectional transmission method such as UDP / IP. Unlike the TCP / IP method used in the conventional Internet broadcasting, this method does not establish a persistent session between the server and the receiver, and does not always use the retransmission scheme.

The present invention can be applied not only to the UDP / IP protocol but also to the TCP / IP protocol, and can be applied not only to unicasting but also to multicasting or anycasting.

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.). Since this process can be easily implemented by those skilled in the art will not be described in more detail.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

Claims

In the error control system in internet unidirectional data broadcasting,
An internet unidirectional broadcast data server for dividing the entire internet unidirectional broadcast data segment into smaller internet unidirectional broadcast data frames or transmitting the same internet unidirectional broadcast data frame multiple times; And
An internet unidirectional broadcast data receiver constituting an entire internet unidirectional broadcast data segment by combining frames including no error in one or a plurality of internet unidirectional broadcast data frames received from the broadcast data server.
Error control system in the Internet unidirectional data broadcasting comprising a.

The method of claim 1,
The server,
Under the control of the control unit, the broadcast data generation unit constitutes all broadcast data segments to be transmitted. The segments are divided into the optimal size broadcast data frames in the broadcast data storage unit, and these broadcast data frames are stored once or several times. An error control system for internet unidirectional data broadcasting, characterized in that for performing internet unidirectional transmission to a receiver through a module.

The method of claim 1,
The receiver includes:
Receiving Internet unidirectional broadcast data frames from the server through the Internet module under the control of the controller, selecting a broadcast data frame that does not contain an error among the received frames and storing them in the data storage to finally configure the entire broadcast data segment An error control system for internet unidirectional data broadcasting.

The method of claim 1,
The receiver may report the error rate of the received broadcast data frame to the server by using the Internet unidirectional transmission method, and the server may analyze the information and determine the size of the broadcast data frame transmitted by the server. A function of determining the number of times of transmitting the same broadcast data frame
Error control system in the Internet one-way data broadcast further comprising.

The method of claim 1,
If the receiver includes an error in the received broadcast data frame, a function of requesting retransmission of the frame to the server using an internet unidirectional transmission method.
Error control system in the Internet one-way data broadcast further comprising.

In the error control method in internet unidirectional data broadcasting,
Dividing the entire Internet one-way broadcast data segment into smaller Internet one-way broadcast data frames in the Internet one-way broadcast data server or transmitting the same Internet one-way broadcast data frame several times; And
Composing an entire Internet one-way broadcast data segment by combining frames not containing an error among one or a plurality of Internet one-way broadcast data frames received from the broadcast data server in an Internet one-way broadcast data receiver.
Error control method in the Internet unidirectional data broadcasting comprising a.