Method for stochastically optimizing effective throughput adopting cross-layer joint encoding in erasure channel

A technology of effective throughput and channel deletion, which is applied in the field of stochastic optimization of effective throughput of cross-layer joint coding, can solve the problems of large time-consuming and low practicability, save channel resources, improve robustness and reliability, The effect of maximizing effective throughput

Active Publication Date: 2014-07-02
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

One of the biggest flaws of this method is that the statistical time for channel state information needs to

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  • Method for stochastically optimizing effective throughput adopting cross-layer joint encoding in erasure channel
  • Method for stochastically optimizing effective throughput adopting cross-layer joint encoding in erasure channel
  • Method for stochastically optimizing effective throughput adopting cross-layer joint encoding in erasure channel

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[0041] Example

[0042] The method for random optimization of effective throughput using cross-layer joint coding in the deletion channel of this embodiment includes the following steps, wherein the possible discrete value space of the Raptor code check rate in this embodiment is [0,0.1,0.2,... .2], a total of 21 values, the possible value space of RS code rate is There are 5, all possible values ​​of the Raptor code check rate and the R-S code rate constitute 101 joint code rates to choose from. Therefore, the size of the feasible search area is 101. In order to achieve sufficient iterations, set the number of selected cycles to be 300;

[0043] (1) Such as figure 1 As shown, after deleting the original data block delivered by the application process in the channel communication system, the sender determines the appropriate packet size L p , Divide the original data block into N in Data packets, and then use Raptor code to in Each original data packet is encoded; the encoded dat...

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Abstract

The invention discloses a method for stochastically optimizing effective throughput adopting cross-layer joint encoding in an erasure channel. The method comprises the steps that (1) a sending end in the erasure channel enables original data delivered by an application program to be subjected to Raptor code encoding on an application layer, coded data are transmitted to a physical layer for R-S code encoding, and the data subjected to joint encoding are sent to the erasure channel; (2) through transmission of the erasure channel, the data reaching a receiving end are subjected to R-S code decoding on the physical layer, after decoding, the decoded data are transmitted to the application layer to be subjected to Raptor code decoding, then the receiving end feeds the decoding condition back to the sending end, and the sending end takes next action according to the feedback information; (3) a discrete stochastic approximation algorithm is adopted, and a proper cross-layer joint code rate is selected to optimize the effective throughput in an erasure channel communication system. The method can stably and efficiently optimize the effective throughput in the erasure channel to the maximum extent.

Description

technical field [0001] The present invention relates to the coding technology field of erasure channel (Erasure channel) communication system, in particular to an erasure channel communication system using cross-layer joint coding (using fountain code as the forward error correction scheme of the application layer, and using Reed-Solomon The effective throughput stochastic optimization method is implemented by channel coding. Background technique [0002] The erasure channel is a general communication channel model used in coding theory and information theory. The information sent through the erasure channel is either received by the receiving end without error, or it is not received by the receiving end (called erasure). The deletion channel was proposed by Peter Elias in 1955, but it has been regarded as a theoretical channel model until the emergence of the Internet as a model in the real world of the deletion channel and its rapid development 40 years later made people ...

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Application Information

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IPC IPC(8): H04L1/00H04L1/16
Inventor 官权升卿娟季飞余华
Owner SOUTH CHINA UNIV OF TECH
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