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System for distributing data by dividing the same into plural pieces of partial data

A technology of partial data and data, applied in the direction of digital transmission system, transmission system, transmission link error control system, etc., can solve problems such as huge calculation amount, and achieve the effect of effective distribution

Inactive Publication Date: 2008-07-16
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this error correction method, a huge amount of calculation is required because of repeated operations

Method used

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  • System for distributing data by dividing the same into plural pieces of partial data
  • System for distributing data by dividing the same into plural pieces of partial data
  • System for distributing data by dividing the same into plural pieces of partial data

Examples

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Embodiment Construction

[0055] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0056] In this embodiment mode, description will be made on a multicast distribution system to which the data transmission system and data transmission method according to the present invention are applied.

[0057] First, the structure of the multicast distribution system is described.

[0058] FIG. 1 is a block diagram illustrating a configuration example of a multicast distribution system according to the present embodiment. This multicast distribution system includes a distribution device (encoding device) 1, transmission devices 2a and 2b, and reception devices (decoding devices) 3a, 3b and 3c. The distribution device 1 and the transmission device 2a, and the distribution device 1 and the transmission device 2b are respectively connected to each other through a first communication link. The transmission device 2a and the reception devices 3a, 3b and 3c, and the t...

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PUM

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Abstract

The invention discloses a system for dividing data into multiple sections of partial data for distribution. The system divides the original data into N sections of partial data and generates L sections of coded data based on the N sections of partial data, wherein N is a natural number greater than 1, and L is a natural number equal to or greater than N, each of the L pieces of coded data includes a header portion and an operation result portion, the header portion including selection data identifying a subset of the N pieces of partial data on which a predetermined operation is performed, the operation result Part is generated by performing a predetermined operation on partial data included in the subset identified by the selection data, wherein the L pieces of coded data are divided into one or more transmission data groups, each of the one or more transmission data groups One is transmitted to one of the one or more first communication links.

Description

technical field [0001] The present invention relates to a system for distributing data by dividing it into pieces of partial data. Background technique [0002] During data transfer from a transmitting device to a receiving device, some data may be lost due to changes in reception conditions, communication congestion, etc. In this case, if some messages can be sent from the receiving device to the transmitting device, the original data can be recovered by retransmitting the lost data. However, if it is not possible to send messages from the receiving device to the transmitting device, for example in the case of multicast, it is difficult to transmit only the missing data. In view of the above circumstances, several data transfer methods have been proposed. [0003] For example, Japanese Unexamined Patent Application Publication No. 5-235979 discloses an asynchronous transfer mode communication method for increasing tolerance to successive loss of data. Furthermore, Japane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04N19/00H04N19/88
CPCH04L2001/0096H04L1/0041H04L1/0072H04L1/00H04L65/00
Inventor 龟山裕亮佐藤裕一佐沢真一
Owner FUJITSU LTD
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