ChinaCom2009-Wireless Communications and Networking Symposium

Research Article

Cooperative Hybrid-ARQ Protocol with Network Coding

  • @INPROCEEDINGS{10.1109/CHINACOM.2009.5339946,
        author={Yue Sun and Ying Li and Xinmei Wang},
        title={Cooperative Hybrid-ARQ Protocol with Network Coding},
        proceedings={ChinaCom2009-Wireless Communications and Networking Symposium},
        keywords={Terms---cooperative communication Hybrid-ARQ network coding superposition modulation.},
  • Yue Sun
    Ying Li
    Xinmei Wang
    Year: 2009
    Cooperative Hybrid-ARQ Protocol with Network Coding
    DOI: 10.1109/CHINACOM.2009.5339946
Yue Sun1,*, Ying Li1,*, Xinmei Wang1,*
  • 1: State Key Lab. of Integrated Service Networks Xidian University, Xi’an, 710071, China
*Contact email:,,


A novel cooperative Hybrid-ARQ protocol was presented on the basis of network coding (C-HARQ-NC). Two users communicated with the base station with the assistance of a relay node. Relay node responded the repeat request and processed two users’ incremental redundancy frames with physical-layer network coding, i.e. signal superposition modulation, before transmitting to the base station. Multi-user joint detection and joint soft decision decoding were adopted at the base station. Compared with traditional Hybrid-ARQ protocol, the C-HARQNC protocol can achieve better performance on flat Rayleigh fading channel, and approximates the performance of cooperative Hybrid-ARQ protocol without network coding with fewer hardware and bandwidth resources.