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Optimal Linear Error Correcting Delivery Schemes for Two Optimal Coded Caching Schemes.

Nujoom Sageer Karat1, Anoop Thomas2, Balaji Sundar Rajan1

  • 1Department of Electrical Communication Engineering, Indian Institute of Science, Bangalore 560012, India.

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Summary
This summary is machine-generated.

This study extends coded caching to error-prone networks, developing optimal error-correcting delivery schemes for CFL and Gomez-Vilardebo caching strategies. These schemes improve data delivery rates over unreliable links.

Keywords:
coded cachingerror correcting delivery schemesindex coding

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Area of Science:

  • Information Theory
  • Wireless Communications
  • Computer Engineering

Background:

  • Coded caching schemes, like the CFL scheme, optimize data delivery for small buffer sizes and numerous users.
  • Existing schemes assume reliable communication links between servers and users.

Purpose of the Study:

  • To extend coded caching to scenarios with error-prone links.
  • To develop and analyze optimal error-correcting delivery schemes for coded caching.
  • To propose new schemes with improved performance, such as lower sub-packetization.

Main Methods:

  • Applied techniques from index coding to derive closed-form expressions for average and peak rates.
  • Developed optimal linear error-correcting delivery schemes based on error-correcting index coding principles.
  • Analyzed an alternative caching scheme with reduced sub-packetization requirements.

Main Results:

  • Derived closed-form expressions for the average and peak rates of the CFL prefetching scheme in error-prone environments.
  • Proposed an optimal linear error-correcting delivery scheme for the CFL scheme.
  • Proposed an optimal linear error-correcting delivery scheme for a scheme with lower sub-packetization requirements.

Conclusions:

  • Optimal error-correcting delivery schemes can be effectively designed for coded caching with error-prone links.
  • The proposed schemes enhance data delivery rates and efficiency in unreliable network conditions.
  • The study provides practical solutions for improving coded caching performance in real-world wireless networks.