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When an object's velocity changes over time, the total distance traveled can be determined by summing small displacement intervals over short increments. This approach approximates the true distance through numerical summation and the use of integral calculus. An estimate of the total displacement can be obtained by measuring velocity at regular intervals and multiplying each value by the corresponding time step.If a runner accelerates over the first three seconds of a race, speed measurements...
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Distributed loads are a common type of load that engineers and scientists encounter in various practical situations. Distributed loads often refer to a type of load spread over a surface or a structure and can be modeled as continuous force per unit area.
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In designing and analyzing filters, resonant circuits, or circuit analysis at large, working with standard element values like 1 ohm, 1 henry, or 1 farad can be convenient before scaling these values to more realistic figures. This approach is widely utilized by not employing realistic element values in numerous examples and problems; it simplifies mastering circuit analysis through convenient component values. The complexity of calculations is thereby reduced, with the understanding that...
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A Scalable Solution for Node Mobility Problems in NDN-Based Massive LEO Constellations.

Miguel Rodríguez Pérez1, Sergio Herrería Alonso1, José Carlos López Ardao1

  • 1atlanTTic Research Center, Universidade de Vigo, Maxwell s/n, 36310 Vigo, Spain.

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This study addresses mobility challenges in massive Low Earth Orbit (LEO) satellite networks by integrating Information Centric Networking (ICN). The proposed solution minimizes traffic loss during satellite handovers, enhancing global internet connectivity.

Keywords:
LEONDNmobility

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Area of Science:

  • Satellite Communications
  • Information Centric Networking
  • Network Mobility Management

Background:

  • Massive Low Earth Orbit (LEO) constellations are increasingly deployed for global internet access, functioning as in-orbit core routers.
  • LEO satellite networks face significant mobility challenges due to high satellite velocities and frequent ground gateway handovers.
  • Information Centric Networking (ICN) offers potential benefits for LEO networks, particularly in managing receiver mobility, but sender mobility remains an issue.

Purpose of the Study:

  • To propose a comprehensive solution for sender mobility in massive LEO constellations using the Named-Data Networking (NDN) architecture.
  • To develop a scalable method for content-to-ground gateway association and traffic addressing without network routing algorithm cooperation.
  • To ensure the proposed solution is easily testable and deployable by not requiring modifications to the NDN protocol.

Main Methods:

  • Leveraging the Named-Data Networking (NDN) architecture, a mature Information Centric Networking (ICN) proposal.
  • Implementing a scalable content-to-ground gateway mapping mechanism.
  • Developing a novel traffic addressing scheme for LEO gateways independent of network routing protocols.

Main Results:

  • The proposed solution effectively manages sender mobility in massive LEO constellations.
  • Traffic losses are found to be negligible for acceptable handover lengths, even with limited satellite visibility.
  • The approach avoids modifications to the core NDN protocol, facilitating practical implementation.

Conclusions:

  • The integration of NDN provides a robust solution to sender mobility challenges in LEO satellite networks.
  • The developed methods enable efficient content delivery and addressing in dynamic LEO environments.
  • The findings support the viability of using ICN architectures for future global internet backbones based on LEO constellations.