Analysis and prediction of 100 km-scale atmospheric duct interference in TD-LTE networks

  • Ting Zhou
  • Tianyu Sun
  • Honglin Hu
  • Hui Xu
  • Yang Yang
  • Ilkka Harjula
  • Yevgeni Koucheryavy
Research Paper
  • 136 Downloads

Abstract

Atmospheric ducts are horizontal layers that occur under certain weather conditions in the lower atmosphere. Radio signals guided in atmospheric ducts tend to experience less attenuation and spread much farther, i.e, hundreds of kilometers. In a large-scale deployed TD-LTE (Time Division Long Term Evolution) network, atmospheric ducts cause faraway downlink wireless signals to propagate beyond the designed protection distance and interfere with local uplink signals, thus resulting in a large outage probability. In this paper, we analyze the characteristics of ADI atmospheric duct interference (Atmospheric Duct Interference) by the use of real network-side big data from the current operated TD-LTE network owned by China Mobile. The analysis results yield the time varying and directional characteristics of ADI. In addition, we proposed an SVM (Support Vector Machine)-classifier based spacial prediction method of ADI by machine learning over combination of real network-side big data and real meteorological data. Furthermore, an implementation of ADMM (Alternating Direction Methods of Multipliers) framework is proposed to implement a distributed SVM prediction scheme, which reduces data exchange among different regions/cities, maintains similar prediction accuracy and is thus of a more practical use to operators.

Keywords

TD-LTE interference map atmospheric duct machine learning wireless big data 

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Copyright information

© Posts & Telecom Press and Springer Singapore 2017

Authors and Affiliations

  • Ting Zhou
    • 1
    • 3
  • Tianyu Sun
    • 1
    • 2
    • 3
  • Honglin Hu
    • 3
  • Hui Xu
    • 1
    • 3
  • Yang Yang
    • 1
    • 3
  • Ilkka Harjula
    • 4
  • Yevgeni Koucheryavy
    • 5
  1. 1.Key Lab of Wireless Sensor Network and Communication, Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghaiChina
  2. 2.School of Information Science and TechnologyShanghaiTech UniversityShanghaiChina
  3. 3.Shanghai Research Center for Wireless CommunicationShanghaiChina
  4. 4.VTT Technical Research Centre of FinlandVTTFinland
  5. 5.Tampere University of TechnologyTampereFinland

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