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Method and apparatus for data recovery in ARQ systems

A technology for data grouping and data processing, applied in transmission systems, digital transmission systems, error prevention, etc., and can solve problems such as bit damage

Inactive Publication Date: 2006-01-11
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many bits in a previously sent packet are likely to be correct, while only one or a few bits are corrupted in most cases

Method used

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  • Method and apparatus for data recovery in ARQ systems
  • Method and apparatus for data recovery in ARQ systems
  • Method and apparatus for data recovery in ARQ systems

Examples

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Embodiment Construction

[0043] In the following description, for purposes of explanation and not limitation, specific details are set forth, such as specific circuits, interfaces, techniques, etc., in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments that differ from the specific details. In other instances, detailed descriptions of well-known methods, devices, and circuits are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0044] The invention is described by way of example only in the sense of a data communication system. The embodiments that follow illustrate the specific application of the invention to a wireless communication environment, and in this regard the invention is not limited to wireless communication or any type of data communication. Other applications of the present invention may be any type of ...

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Abstract

The present invention recovers data utilizing information from previously received data packets to reconstruct a data packet with an ever increasing probability of reconstructing the actually transmitted data packet. With each new reception, the accumulated information brings the receiver closer to obtaining the actually transmitted data packet. This use of information which might otherwise be discarded permits highly efficient and effective bit error correction particularly useful in hostile communications environments by transceivers with limited data processing and / or memory ressources.

Description

technical field [0001] This invention relates generally to the fields of data processing and communications, and in particular to the recovery of data sent over a communications channel and retrieved from memory. Background technique [0002] In digital data systems, it is not uncommon for data stored in memory and data sent over communication channels to be corrupted by errors. The techniques generally used to detect errors and / or correct detected errors vary. One example of an error detection technique is the well known cyclic redundancy code (CRC) check. Others use techniques such as block codes and convolutional codes for simultaneous error detection and error correction. Additional coding bits are added to the data bits for error detection and correction. When data is received from the communication channel or retrieved from memory, the received or retrieved data is decoded in the same manner with additional bits to detect if some data is in error. One way to think ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04L29/08
CPCH04L1/188H04L1/1845H04L1/1812H04L1/18
Inventor T·J·多伊龙
Owner TELEFON AB LM ERICSSON (PUBL)
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