5G • 5G-Advanced (Rel-18)
PRS Efficiency Enhancements
High-Density Positioning Reference Signal Spectral Optimization
Optimizes PRS pilot patterns to achieve high positioning accuracy while consuming 50% fewer resource blocks, preserving bandwidth for user data.
Technical Explanation
Positioning Reference Signals (PRS) occupy valuable time-frequency resource elements that would otherwise carry paying user data. Rel-18 optimizes PRS comb patterns and mute sequences: by concentrating PRS energy into optimized pseudo-random staggering sequences, the network achieves identical timing accuracy while freeing half the spectrum for mobile data.
Key Functions
- Optimizes PRS frequency comb patterns (Comb-2, Comb-4, Comb-12) for spectral efficiency
- Reduces cellular bandwidth consumed by positioning reference signals by over 50%
- Minimizes cross-cell interference between overlapping PRS pilot transmissions
- Maintains high time-of-arrival resolution across wideband 5G-Advanced carriers
Specifications
3GPP TS 38.211, TS 38.214 (Rel-18)
Interfaces
Uu (PRS)
Related 5G Concepts
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