5th International ICST Conference on Communications and Networking in China

Research Article

Rateless code in QoS-based multiuser scheduling for MIMO systems

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  • @INPROCEEDINGS{10.4108/chinacom.2010.19,
        author={Feng Wang and Zhifeng Zhao and Honggang Zhang},
        title={Rateless code in QoS-based multiuser scheduling for MIMO systems},
        proceedings={5th International ICST Conference on Communications and Networking in China},
        publisher={IEEE},
        proceedings_a={CHINACOM},
        year={2011},
        month={1},
        keywords={MIMO multiuser diversity scheduling Rateless code systematic Raptor code},
        doi={10.4108/chinacom.2010.19}
    }
    
  • Feng Wang
    Zhifeng Zhao
    Honggang Zhang
    Year: 2011
    Rateless code in QoS-based multiuser scheduling for MIMO systems
    CHINACOM
    ICST
    DOI: 10.4108/chinacom.2010.19
Feng Wang1,2,*, Zhifeng Zhao1,2,*, Honggang Zhang1,2,*
  • 1: York-Zhejiang Lab for Cognitive Radio and Green Communications
  • 2: Department of Information Science and Electronic Engineering, Zhejiang University, Zheda Road 38, 310027 Hangzhou, China
*Contact email: wfrabbit@zju.edu.cn, zhaozf@zju.edu.cn, honggangzhang@zju.edu.cn

Abstract

This paper proposes a new multiuser scheduling scheme for MIMO system that can simultaneously support various QoS requirements of different user groups while satisfying fairness among the same user group in a RRS (Round Robin Scheme) manner. To guarantee high transmission reliability, a cross-layer scheme is adopted by combing spatial diversity in the physical layer and systematic Raptor code in the MAC layer. The delay-sensitive users are scheduled with higher priority. When only one user is chosen at each time slot, spatial diversity is adopted to guarantee a low BER. Furthermore, if N_t users are chosen at each time slot, AA-RRS (Antenna Assisted Round Robin Scheme) is adopted to improve the system capacity, which is brought by the inherent multiuser diversity of the MIMO system. Simulation results demonstrate that the proposed cross-layer scheduling scheme can guarantee a much higher reliability than spatial diversity transmission with only a small increase of delay.