Quality, Reliability, Security and Robustness in Heterogeneous Systems. 13th International Conference, QShine 2017, Dalian, China, December 16 -17, 2017, Proceedings

Research Article

An Interference Management Strategy for Dynamic TDD in Ultra-dense Networks

  • @INPROCEEDINGS{10.1007/978-3-319-78078-8_15,
        author={Shuming Seng and Xi Li and Hong Ji and Heli Zhang},
        title={An Interference Management Strategy for Dynamic TDD in Ultra-dense Networks},
        proceedings={Quality, Reliability, Security and Robustness in Heterogeneous Systems. 13th International Conference, QShine 2017, Dalian, China, December 16 -17, 2017, Proceedings},
        proceedings_a={QSHINE},
        year={2018},
        month={4},
        keywords={UDNs TDD Clustering ICI MBF},
        doi={10.1007/978-3-319-78078-8_15}
    }
    
  • Shuming Seng
    Xi Li
    Hong Ji
    Heli Zhang
    Year: 2018
    An Interference Management Strategy for Dynamic TDD in Ultra-dense Networks
    QSHINE
    Springer
    DOI: 10.1007/978-3-319-78078-8_15
Shuming Seng1,*, Xi Li1,*, Hong Ji1,*, Heli Zhang1,*
  • 1: Beijing University of Posts and Telecommunications
*Contact email: seng@bupt.edu.cn, lixi@bupt.edu.cn, jihong@bupt.edu.cn, zhangheli@bupt.edu.cn

Abstract

Ultra-dense networks (UDNs) are considered to meet demands for fast increasing throughput requirements per unit area in hotspots. Along with the dynamic variation of the throughput for the uplink/downlink (UL/DL), flexible resource allocation schemes become very important in UDNs based on time division duplex (TDD) for densely deployed access points (APs) and user equipments (UEs). In this paper, we propose a strategy to resolve the interference problem brought by dynamic TDD in UDNs. Firstly, we design a clustering method based on the Chameleon algorithm to reduce the inter-cluster interference. With the clustering results, the throughput requirements of each cluster become similar. Then we adopt a dynamic UL/DL resource allocation (DRA) for small cells in each cluster, with fewer adopted frame structures reaching more users’ throughput requirements adequately. At last, in each cluster, we adopt multi-cell beamforming (MBF) in small cells with the same frame structure to further mitigate inter-cell interference (ICI). Simulation results show that our proposed strategy could achieve satisfactory performance in UL/DL throughput.