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Multiple flows for incremental forward error correction mechanisms

A forward error correction control and forward error correction technology, applied in the field of incremental forward error correction, can solve problems that cannot be completely solved

Inactive Publication Date: 2011-02-16
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Link-layer technical solutions for each transmission line solve but do not completely solve the problem

Method used

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  • Multiple flows for incremental forward error correction mechanisms
  • Multiple flows for incremental forward error correction mechanisms
  • Multiple flows for incremental forward error correction mechanisms

Examples

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Embodiment Construction

[0015] The present invention provides a method and apparatus for incremental forward error correction (FEC) in a digital network, such as a Digital Subscriber Line (DSL) network.

[0016] Advantageously, the invention adapts application layer forward error correction to the needs of the specific link conditions of each transmission line. The extent of the forward error correction information flow is maintained from the point of content generation to the Digital Subscriber Line Access Multiplexer (DSLAM). The streams are separately acknowledgable and have incremental error correction or parity bytes relative to each other. Proper FEC level selection is performed on each transmission line of the DSLAM. Selection of appropriate matching streams at the DSLAM will result in the application of an appropriate amount of FEC per DSL transmission line. Because this option is delivered to each transmission line with a conservative amount of error correction, bandwidth efficiency is imp...

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Abstract

There are provided a customer premise equipment (CPE) device, a corresponding method, and a Digital Subscriber Line Access Multiplexer (DSLAM) for connecting to a digital network and performing forward error correction (FEC). The CPE device includes a decoder for decoding one of a plurality of incremental FEC signals for media content. Each of the plurality of incremental FEC signals is for providing incrementally increasing levels of FEC for the media content.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 60 / 633,477, filed December 6, 2004, the contents of which are hereby incorporated by reference in their entirety. technical field [0003] The present invention relates generally to digital networks, and more particularly to methods and apparatus for incremental forward error correction in digital networks. Background technique [0004] In any digital network, forward error correction (FEC) can be used at the application layer to increase the stability of the transport capacity. The same applies to Digital Subscriber Line (DSL) networks. However, in a DSL network, each transmission line at the customer end has a unique behavior pattern in terms of overall end-to-end link quality performance. Its variation can vary quite significantly. The link layer technology solution for each transmission line solves the problem but does not completely solve it. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/66
CPCH04L41/0631H04L1/0057H04L43/026H04L2001/0097H04L1/0009H04L12/66H04L12/16
Inventor 库马尔·拉马斯瓦米
Owner THOMSON LICENSING SA
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