Data broadcasting method based on finite set network code ARQs and for large-scale receiving ends

A large-scale receiver and network coding technology, applied in the field of large-scale receiver data broadcasting based on limited set network coding ARQ, to reduce the number of transmissions, improve energy efficiency, and reduce network delay.

Active Publication Date: 2014-08-27
PLA UNIV OF SCI & TECH
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Problems solved by technology

[0010]Existing ARQ schemes, such as Partial Feedback Selective Retransmission Scheme (PSARQ) and Network Coding Retransmission Scheme (NARQ), cannot be well applied to large-scale In the data broadcasting scenario at the receiving end, the main manifestations are: first, the amount of feedback information is large, and channel resources are occupied; second, the average number of retransmissions of data packets is large, and the broadcasting efficiency is low
In other words, the existing broadcast retransmission technology has low retransmission efficiency and excessive feedback information when there are a large number of receivers

Method used

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  • Data broadcasting method based on finite set network code ARQs and for large-scale receiving ends
  • Data broadcasting method based on finite set network code ARQs and for large-scale receiving ends
  • Data broadcasting method based on finite set network code ARQs and for large-scale receiving ends

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Embodiment Construction

[0055] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail in conjunction with the following examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0056] Such as figure 1 As shown, this large-scale receiver data broadcasting method based on finite set network coding ARQ includes the following steps:

[0057] 1, a kind of finite set network coding ARQ method in large-scale receiver data broadcasting, it is characterized in that, comprises following processing steps:

[0058] Step 1.1), the base station broadcasts the data packet:

[0059] The base station broadcasts the original data packet or the network coded data packet; the said Raw packets are generated by The base station encodes the original data to form ；

[0060] Step 1.2), decoding and storage:

[00...

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Abstract

The invention discloses a data broadcasting method based on the finite set network code ARQs and for large-scale receiving ends. The method comprises the following steps that (1) a base station broadcasts data packets; (2) the receiving ends conduct decoding and calculate the decoding gain of each preset network coding scheme according to the decoding satiations, and then the serial number of the scheme with the largest decoding gain is fed back; (3) the base station determines the network coding scheme adopted into the current retransmission by counting feedback information of the receiving ends. According to the data broadcasting method, the finite set network coding schemes need to be pre-set in the base station and at the receiving ends and the finite set network codes preset ARQs are introduced in broadcast communications, therefore, the amount of feedback information is reduced, the average number of retransmission times of the data packets is reduced, the broadcast communication efficiency is improved, and the problems that in an existing broadcast retransmission technology, the retransmission efficiency is low and the number of feedback information is too large under the condition that a large number of receiving ends exist are mainly solved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to a feedback retransmission technology in large-scale receiver data broadcast communication, is a finite set network coding ARQ, and particularly relates to a large-scale receiver data broadcasting method based on finite set network coding ARQ . [0002] Background technique [0003] Automatic repeat request (Automatic-Repeat-reQuset, ARQ) is a simple and effective technique to improve communication reliability in unreliable channel transmission. "Lin Shu, Costello. Error Control Coding (translated by Yan Jian et al). Beijing: Mechanical Industry Press, 2007.6", "Cam, R.; Leung, C.; , "Throughput analysis of some ARQ protocols in the presence of feedback errors," Communications, IEEE Transactions on , vol.45, no.1, pp.35-44, Jan 1997", "Yu, P.; Shu Lin; , "An Efficient Selective-Repeat ARQ Scheme for Satellite Channels and Its Throughput Analysis," Communications, IEEE T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/00
Inventor 徐友云王健许魁王聪谢威
Owner PLA UNIV OF SCI & TECH
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