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1. CN103490866 - Satellite-ground transmission network HARQ transmission method based on network coding

Office Chine
Numéro de la demande 201310403214.9
Date de la demande 06.09.2013
Numéro de publication 103490866
Date de publication 01.01.2014
Numéro de délivrance 103490866
Date de délivrance 17.08.2016
Type de publication B
CIB
H04L 1/18
HÉLECTRICITÉ
04TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
LTRANSMISSION D'INFORMATION NUMÉRIQUE, p.ex. COMMUNICATION TÉLÉGRAPHIQUE
1Dispositions pour détecter ou empêcher les erreurs dans l'information reçue
12en utilisant un canal de retour
16dans lequel le canal de retour porte des signaux de contrôle, p.ex. répétition de signaux de demande
18Systèmes de répétition automatique, p.ex. système Van Duuren
H04L 1/00
HÉLECTRICITÉ
04TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
LTRANSMISSION D'INFORMATION NUMÉRIQUE, p.ex. COMMUNICATION TÉLÉGRAPHIQUE
1Dispositions pour détecter ou empêcher les erreurs dans l'information reçue
Déposants BeiHang University
Space Star Technology Co., Ltd.
Inventeurs Xu Zhen
Meng Xinhui
Wang Chong
Mandataires guan hanzeng
Titre
(EN) Satellite-ground transmission network HARQ transmission method based on network coding
(ZH) 星地传输网络中基于网络编码的HARQ传输方法
Abrégé
(EN)
The invention discloses a satellite-ground transmission network HARQ transmission method based on network coding. According to the satellite-ground transmission network HARQ transmission method based on network coding, in point-to-point communication without an intermediate node, when transmission of a plurality of data packages is wrong, a transmitting terminal selectively conducts network coding on the wrong data packages in pair and transmits the wrong data packages in pair in the retransmission process, and a receiving terminal conducts united iteration decoding on the retransmitted data packages and the data packages which are transmitted for the first time. According to the satellite-ground transmission network HARQ transmission method based on network coding, the HARQ technology and network coding are integrated, network coding is added to the process of retransmission, and after network coding is conducted on every two wrong data packages, the every two wrong data packages are retransmitted. According to the traditional HARQ, one-time retransmission of every two wrong data packages needs four time slots. According to the HARQ based on network coding, one-time retransmission of every two wrong data packages only needs three time slots, and therefore the number of times of retransmission is reduced. Due to the fact that the number of times of retransmission is reduced, the throughput of a system can be increased. Selective network coding can improve the accuracy probability of united decoding and increase the residue frame error rate.

(ZH)
本发明公开了一种星地传输网络中基于网络编码的HARQ传输方法。在无中间节点的点对点通信中,当有多个数据包传输错误时,在重传过程中,发送端将错误数据包选择性的两个一组进行网络编码后发送,接收端将重传包和首次发送的数据包进行联合迭代解码。本发明将HARQ技术和网络编码结合,在重传过程中加入网络编码,将两个错误包进行网络编码后发送重传。传统的HARQ需要四个时隙对两个错误数据包完成一次重传,基于网络编码的HARQ只需三个时隙即可完成一次重传,减少了重传次数;减少重传次数,从而可以增大系统的吞吐量;选择性网络编码可提高联合解码正确概率,增大残余误帧率。