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Adaptative forward error control scheme

一种分组错误率、传输块的技术,应用在防止差错、基于链路质量的传输修改、传输系统等方向

Inactive Publication Date: 2010-10-06
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the proposed method is not well suited for those transport networks where the state may change in a significant way, such as mobile networks like GSM, UMTS, GPRS

Method used

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Examples

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Embodiment Construction

[0031] The invention is applicable to any FEC scheme. In the example described below, the FEC code is characterized by two parameters k and n, where k is the number of media packets, and (n-k) is the number of redundant packets generated from k media packets. The parameter n has a constant integer value. The amount of redundancy is adapted by changing the value of parameter k. This is not restrictive.

[0032] figure 1 An example of a transmission system according to the present invention is shown, which includes a transmitter 1, a transmission network 2, and a receiver 3. In this example, the transmission network 2 is composed of an Internet network and a wireless access network (for example, a network compliant with GPRS or UMTS standards). The transmitter 1 includes: a media source 10 for delivering media packets, an FEC encoder 12 for generating redundant packets from media packets received from the media source 10, and the first four layers of the OSI reference model for...

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PUM

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Abstract

The invention applies to packet transmission networks. It proposes an adaptive forward error control scheme implemented at the application level, allowing to respect a maximum tolerated packet error rate. According to the invention, the amount of redundancy is adapted so as to offer a correction capability allowing to respect said maximum tolerated packet error rate. Advantageously, the maximum tolerated packet error rate is set by the application.

Description

Technical field [0001] The present invention relates to an adaptive forward error correction (FEC) scheme that aims to provide elastic data transmission via a packet-switched transmission network. [0002] The invention also relates to a transmission system, a transmitter and a receiver that implement such a forward error control scheme. [0003] The invention also relates to a method for determining the amount of redundancy to be used in such a forward error correction scheme. [0004] Advantageously, the present invention is applied to data transmission via a transmission network with a time-varying state, such as a mobile transmission network. Background technique [0005] International patent application WO99 / 04338 describes an adaptive forward error correction scheme for transmission via wireless satellite links. [0006] The forward error correction scheme described in this document operates at the data link layer of the OSI reference model (the forward error correction code is i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
CPCH04L1/0025H04L1/0009H04L1/00H04L2012/5603H03M13/00
Inventor L·费伊J·-M·雷梅C·萨姆森
Owner KONINK PHILIPS ELECTRONICS NV
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