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Stochastic Optimization Method for Effective Throughput Using Cross-layer Joint Coding in Erasure Channels

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

Active Publication Date: 2017-06-23
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 be long enough (theoretically infinite) to be accurate enough, so it takes too much time and is not practical

Method used

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  • Stochastic Optimization Method for Effective Throughput Using Cross-layer Joint Coding in Erasure Channels
  • Stochastic Optimization Method for Effective Throughput Using Cross-layer Joint Coding in Erasure Channels
  • Stochastic Optimization Method for Effective Throughput Using Cross-layer Joint Coding in Erasure Channels

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Embodiment

[0042] This embodiment deletes the effective throughput random optimization method of cross-layer joint coding in the channel, including the following steps, wherein the possible discrete value space of the Raptor code verification rate in this embodiment is [0, 0.1, 0.2, .. .2], there are 21 values ​​in total, and the possible value space of the R-S code rate is There are 5, and 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 domain is 101. In order to achieve sufficient iterations, the number of selection cycles this time is set to 300;

[0043] (1) if figure 1 As shown, after the sender in the deletion channel communication system obtains the original data block delivered by the application process, determine the appropriate packet size L p , divide the original data block into N in packets, and then use the Raptor code to pair the N in Each original 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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