Diversity combining and handover techniques: enabling 5G using MEO satellites

Diversity combining and handover techniques: enabling 5G using MEO satellites

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In this chapter, we provide a thorough review of medium Earth orbit (MEO) satellites, highlighting their applications, peculiarities, and the role that they may play in the implementation of 5G for satellite networks. In particular, we will explain why MEO satellites are a new paradigm, how to tackle the challenges related to their usage, and how they fit into the 5G context. In this perspective, we will show how diversity combining and handover are key functionalities for their successful integration. Towards describing the 5G paradigm with MEO satellites, the chapter first provides a high-level description of the satellite characteristics, the services that have been deployed, and also possible future applications. Further, a high-level description of all the atmospheric effects affecting typical MEO communications is included. Finally, a critical review of handover techniques (state-of-the-art, trade-offs, and future challenges), as well as a review of combining techniques (theoretical performance in a MEO scenario, advantages, drawbacks, and trade-offs), will be presented.

Chapter Contents:

  • 7.1 Introduction
  • 7.2 Medium Earth orbit satellites: architectures, services and applications, challenges
  • 7.2.1 The O3b satellite network
  • 7.3 Channel characterization for MEO satellites
  • 7.3.1 Uplink radio propagation effects
  • 7.3.2 Downlink radio propagation effects
  • 7.3.3 Payload effects
  • 7.3.4 User terminal effects
  • 7.4 Handover: satellite switching for MEO
  • 7.4.1 Literature
  • Concepts of handover
  • Physical layer handover mechanisms
  • Higher layer handover mechanisms
  • Summary on handover
  • 7.4.2 Handover architecture
  • 7.4.3 Dynamic interactions
  • Flows
  • 7.4.4 Proof of concept and results
  • Basic handover tests
  • Handover tests with many TCP sessions
  • Summary on the handover tests
  • 7.5 Diversity combining for MEO satellite applications
  • 7.5.1 Combining mechanisms: state-of-art-review
  • 7.5.2 Combining position
  • Combining before the matched filtering
  • Combining after the matched filtering
  • 7.5.3 Performance of combining techniques
  • Maximum ratio combining
  • Equal gain combining
  • 7.5.4 Switching threshold computation using downlink SNR
  • Performance trade-off
  • 7.5.5 Switching threshold computation using total SNR
  • 7.5.6 Combining gain
  • 7.6 Roadmap
  • 7.7 Conclusions
  • References

Inspec keywords: diversity reception; mobility management (mobile radio); mobile satellite communication; 5G mobile communication; satellite communication

Other keywords: MEO satellites; medium Earth orbit satellite; satellite characteristics; satellite networks; diversity combining techniques; atmospheric effects; MEO communications; handover techniques; high-level description

Subjects: Mobile radio systems; Satellite communication systems

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