8th International Conference on Communications and Networking in China

Research Article

Adaptive CQI adjustment with LTE higher-order sectorization

  • @INPROCEEDINGS{10.1109/ChinaCom.2013.6694580,
        author={Xinyu Gu and Wenyu Li and Lin Zhang},
        title={Adaptive CQI adjustment with LTE higher-order sectorization},
        proceedings={8th International Conference on Communications and Networking in China},
        publisher={IEEE},
        proceedings_a={CHINACOM},
        year={2013},
        month={11},
        keywords={higher-order sectorization link adaptation cqi crs inter-cell interference},
        doi={10.1109/ChinaCom.2013.6694580}
    }
    
  • Xinyu Gu
    Wenyu Li
    Lin Zhang
    Year: 2013
    Adaptive CQI adjustment with LTE higher-order sectorization
    CHINACOM
    IEEE
    DOI: 10.1109/ChinaCom.2013.6694580
Xinyu Gu1,*, Wenyu Li2, Lin Zhang3
  • 1: Beijing University of Posts and Telecomunications
  • 2: China Academy of Telecommunication Research of MIIT
  • 3: Beijing University of Posts and Telecommunications
*Contact email: guxinyu.bj@gmail.com

Abstract

To cope with the rapidly increased demands for traffic volumes and end-user datarates, deploying higher-order sectorization is an effective way especially in highly loaded scenario. However, for LTE, the mismatch between the interference level of the cell-specific reference signal and data is more severe with higher-order sectorization. This results in inaccurate channel quality estimation and conservative link adaptation. This paper proposes an adaptive adjustment algorithm to compensate the under-estimated channel quality. Simulation results clearly prove that the proposed algorithm can effectively improve the link adaptation and consequently improve end-user datarates.