Prerequisites & Notation

Before You Begin

This chapter places coded caching inside the integrated sensing and communication (ISAC) paradigm emerging in 6G. Prerequisites: MAN basics and basic radar / estimation theory.

  • MAN coded caching (Ch 2)(Review ch02)

    Self-check: Can you state the memory-rate tradeoff R∗(M)R^*(M)?

  • Multi-antenna coded caching (Ch 5)(Review ch05)

    Self-check: What is the DoF expression t+Lt + L?

  • Radar fundamentals: CRB, range/Doppler estimation(Review ch11)

    Self-check: What is the Cramer-Rao bound for delay estimation?

  • ISAC basics(Review ch12)

    Self-check: What are the three communication-sensing integration levels?

  • Cellular network context (cross-book)

    Self-check: What is a gNodeB and how does it handle both data and sensing?

Notation for This Chapter

Symbols for ISAC + coded caching.

SymbolMeaningIntroduced
KKNumber of communication userss01
MMCache size at each users01
RRCommunication delivery rates02
ρ\rhoFraction of transmit power/bandwidth allocated to sensings02
CRB\text{CRB}Cramer-Rao bound on sensing parameter estimations02
α\alphaSensing prediction accuracy (fraction of demands correctly predicted)s03
θ\thetaSensing parameter (e.g., target range, velocity)s02
← Ch 18ISAC Background and the Caching Opportunity