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Error control method and system

A technology for error control and encoding coefficient matrix, applied in storage, error control method and system, capable of solving data recovery and other problems

Inactive Publication Date: 2009-04-08
吕晓雯 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In multicast applications, there are a large number of users receiving a common data source, and the standard multicast protocol does not have feedback, which brings new problems: if packet loss occurs on the network, the data lost by each user may not be Similarly, an effective recovery mechanism is needed for this purpose, no matter which data packets the user loses, the lost data can be recovered
Similarly, in the field of storage, there is also the problem of how to recover lost data

Method used

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Embodiment Construction

[0050] The number field P in the above technical solution can adopt any infinite number field or finite number field, such as the real number field and the rational number field, and the finite number field such as the basic Galois field, and the operations in these number fields are as in the real number field operations in domain, 50 50 It is a huge number, which needs to increase the storage space and is not conducive to the effective use of channel capacity. Using the extended Galois p in finite fieldsq domain, if p is 2, the result of any operation will not require more storage space. When implementing the method described in the present invention, the general selection of extended Galois 2 q area. Since 2 q Intra-domain operation is a bit difficult to understand, although it is described in detail in some mathematics and computer books, but here is an example 2 8 Operations within the domain for easy understanding. There are two values ​​0, 1 in field 2, addition op...

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Abstract

The invention discloses an error control method and a system thereof, and is applicable to the fields of communication, storage and the like; and in the fields, the method or the system of the invention can effectively restore the lost data and enhance the data integrity. The method comprises the steps of generating a coding coefficient and redundant packages, generating a decoding coefficient and restoring information sources and the like. A transmitting terminal generates m redundant packages by n information sources, and transmits the information sources and redundancy packages to a receiving terminal, and as long as the sum of the numbers of the information sources and the redundant packages which are received by the receiving terminal is more than n, then n information sources can be restored. The method and the system skillfully maximize the amount of information and minimize the amount of computation by computation in a Van der Monde matrix and an extended Galois 2<q> field. The error control method or the system can be used in multicast and broadcast communication, which can acquire good effect.

Description

technical field [0001] The invention relates to an error control method and system, which are suitable for communication, storage and other fields. Background technique [0002] With the development of broadband network and video services, multicast has been widely used, such as IPTV. In multicast applications, there are a large number of users receiving a common data source, and the standard multicast protocol does not have feedback, which brings new problems: if packet loss occurs on the network, the data lost by each user may not be Similarly, an effective recovery mechanism is needed for this purpose, no matter which data packets the user loses, the lost data can be recovered. Similarly, in the field of storage, there is also the problem of how to recover lost data. Contents of the invention [0003] Object of the invention: The object of the invention is to provide an error control method and a system for realizing the method, which can effectively recover lost data...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L1/22H04L12/18
Inventor 吕晓雯刘怡梅杜玲
Owner 吕晓雯
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