8th International Conference on Communications and Networking in China

Research Article

Random-Backoff Enabled Distributed Scheduling in CoMP Systems

  • @INPROCEEDINGS{10.1109/ChinaCom.2013.6694569,
        author={Cui Zeng and Pinyi Ren and Ruiping Qiao and Qinghe Du and Li Sun},
        title={Random-Backoff Enabled Distributed Scheduling in CoMP Systems},
        proceedings={8th International Conference on Communications and Networking in China},
        publisher={IEEE},
        proceedings_a={CHINACOM},
        year={2013},
        month={11},
        keywords={coordinated multi-point transmission; distributed coordination scheduling; random backoff principle},
        doi={10.1109/ChinaCom.2013.6694569}
    }
    
  • Cui Zeng
    Pinyi Ren
    Ruiping Qiao
    Qinghe Du
    Li Sun
    Year: 2013
    Random-Backoff Enabled Distributed Scheduling in CoMP Systems
    CHINACOM
    IEEE
    DOI: 10.1109/ChinaCom.2013.6694569
Cui Zeng1, Pinyi Ren1,*, Ruiping Qiao1, Qinghe Du1, Li Sun1
  • 1: Xi'an Jiaotong University
*Contact email: pyren@mail.xjtu.edu.cn

Abstract

Coordinated Multi-Point transmission (CoMP) is one of the key technologies in LTE-Advanced (LTE-A) systems to effectively improve the spectral efficiency of cell-edge users. In this paper, we propose a random-backoff enabled distributed scheduling scheme in CoMP systems, which aims at combating inter-cell interferences and efficiently enhancing the cell-edge users' spectral efficiency. Specifically, each base station (BS) uses the dynamic clustering algorithm to identify the cells causing the strongest interferences to its scheduled user. Then, in order to eliminate the strong interferences, each BS sends the coordination requests to BSs of these interfering cells. After exchanging coordination requests, each BS decides whether to continue transmissions for its scheduled user based on the coordination requests and the number of coordinated cells. If there are still collisions after coordination, the BSs of the corresponding cells use random backoff strategies for collision avoidance. Simulations results show that our proposed distributed scheme outperforms the conventional schemes in terms of the spectral efficiency of cell-edge users.