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Data broadcasting method combing maximum degree opportunity transmission and network coding ARQ

A technology of network coding and data broadcasting, which is applied in transmission systems, digital transmission systems, error prevention/detection using return channels, etc. It can solve the problems of low frequency spectrum efficiency of broadcast communication and no consideration of decoding opportunities, etc.

Active Publication Date: 2015-12-16
PLA UNIV OF SCI & TECH
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

At the same time, the traditional network-coded ARQ method sends all the generated network-coded data packets once during the retransmission phase, without considering the decoding opportunities that these network-coded data packets can provide at the receiving end, resulting in low spectral efficiency of broadcast communication

Method used

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  • Data broadcasting method combing maximum degree opportunity transmission and network coding ARQ
  • Data broadcasting method combing maximum degree opportunity transmission and network coding ARQ
  • Data broadcasting method combing maximum degree opportunity transmission and network coding ARQ

Examples

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Embodiment 1

[0068] Such as figure 1 As shown, the data broadcasting method of this joint maximum degree opportunity transmission and network coding ARQ is characterized in that comprising the following processing steps:

[0069] Step (1.1), the base station broadcasts the data packet:

[0070] The base station performs channel coding and modulation on the original information to form an original data packet, and then the base station broadcasts the original data packet to all receivers;

[0071] Step (1.2), receiver processing and feedback:

[0072] The receiving end performs soft demodulation and channel decoding on the received original data packets, and judges whether the decoding is correct through the CRC check at the end of the decoded information;

[0073] If an original data packet can be correctly decoded at a receiving end, the receiving end stores the decoded original information, and uses the feedback channel to feed back to the base station to inform the base station that t...

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Abstract

The invention discloses a data broadcasting method combing maximum degree opportunity transmission and network coding ARQ. The method comprises the following steps that a base station broadcasts a data packet; a receiving end decodes the data packet and feeds a correct decoding situation of the data packet back to the base station; the base station performs maximum degree network coding on lost original information in order to generate a network coding data packet, retransmits the network coding data packet by using maximum degree opportunity retransmission strategy, and the receiving end feeds a data packet recovered in the retransmission phase back to the base station; repeating the step 3 until all receiving ends correctly receive all data packets. The data broadcasting method guarantees that the data packet subjected to network coding may provide as many decoding opportunities as possible for the receiving ends, does not retransmit the data packet which cannot provide many decoding opportunities for the receiving ends, and retransmits the network codes in the next round. The method has characteristics of low number of average retransmission times and high broadcast efficiency and can be well used in a wireless data broadcast scene.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to a feedback retransmission technology in wireless data broadcast communication, is a joint maximum degree opportunity transmission and network coding ARQ, and particularly relates to a data broadcast method combining maximum degree chance transmission and network coding ARQ . Background technique [0002] Automatic Repeat-request technology (Automatic-Repeat-reQuset, ARQ) is a simple and effective technology for improving communication reliability in unreliable channels. "Lin Shu, Costello. Error Control Coding (translated by Yan Jian et al.). Beijing: Machinery Industry Press, 2007.6", "Cam, R.; Leung, C.;,"ThroughputanalysisofsomeARQprotocolsinthepresenceoffeedbackerrors,"Communications, IEEETransactionson, vol. 45, no.1, pp.35-44, Jan1997", "Yu, P.; ShuLin;," An Efficient Selective-Repeat ARQ Scheme for Satellite Channels and Its Throughput Analysis," Communications, ...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L1/00
CPCH04L1/0076H04L1/1812H04L1/1825
Inventor 许魁潘秋琪马楠张冬梅范昌
Owner PLA UNIV OF SCI & TECH
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