This paper studies a hybrid automatic repeat and request (HARQ) mechanism for multicast/broadcast services in 5G New Radio (NR) systems. HARQ is widely used in unicast transmission to improve reliability and resource efficiency under the fading channel. However, for multicast/broadcast, it is difficult to apply conventional HARQ technology because the probability of retransmission becomes high as the number of receiver increases. In this paper, we propose a novel and efficient retransmission scheme, called outer code- based HARQ. After the initial transmission of a given data packet for multicast/broadcast, each receiver sends feedback information on how many code blocks (CBs) are broken instead of which CBs are broken. Then, for retransmission of the data, the transmitter generates parity CBs by using outer code such as Reed- Solomon (RS) or Raptor code and transmits the parity CBs after applying inner code such as low density parity check (LDPC) code. Numerical results show that the proposed scheme outperforms the conventional HARQ schemes, reducing more than 50% of retransmissions.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Outer Code-Based HARQ Retransmission for Multicast/Broadcast Services in 5G


    Contributors:
    Yeo, Jeongho (author) / Bang, Jonghyun (author) / Ji, Hyoungju (author) / Kim, Younsun (author) / Lee, Juho (author)


    Publication date :

    2019-09-01


    Size :

    542450 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    INCIDENT BROADCAST RETRANSMISSION IN A VEHICULAR NETWORK

    MATTELA GOVARDHAN | European Patent Office | 2018

    Free access

    Poster: Performance analysis of early HARQ retransmission scheme in highway environments

    Shiomitsu, Yusaku / Okamoto, Eiji / Mikami, Manabu et al. | IEEE | 2020


    Two QoS Regions Packet Scheduling for Multimedia Broadcast Multicast Services

    Eusebio, P. / Correia, A. / IEE Communication Networks and Services Professional Network | British Library Conference Proceedings | 2005


    Multichannel Design of Non Uniform Constellations for Broadcast/Multicast Services

    Mouhouche, Belkacem / Al-Imari, Mohammed / Ansorregui, Daniel | IEEE | 2016


    Low Latency HARQ Method Using Early Retransmission Prior to Channel Decoding with Multistage Decision

    Taniyama, Kentarou / Kishiyama, Yoshihisa / Higuchi, Kenichi | IEEE | 2019