Reference Signal Mapping in Dynamic Spectrum Sharing

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Solution Overview

Problem

The existing methods for mapping reference signals in communication systems, particularly in the context of Dynamic Spectrum Sharing (DSS) between NR and LTE systems, have not been sufficiently discussed, leading to inefficiencies and potential collisions between reference signals.

Innovation Solution

A receiving apparatus and method that decide the mapping of a second reference signal in a second system based on information that allows the mapping of a first reference signal in a first system to be identified, thereby avoiding collisions and ensuring appropriate signal mapping.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If reference signals are mapped in the same frequency band for NR and LTE systems, then spectrum utilization is improved, but signal collisions occur between reference signals

Engineering Contradiction:

Improvespectrum utilizationVSAvoidsignal collision avoidance

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent segments the reference signal mapping by system type (NR vs LTE). The control circuitry determines whether to map NR downlink reference signals based on the presence of LTE uplink reference signals, effectively dividing the frequency band usage into system-specific segments to avoid collisions while maintaining high spectrum utilization

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic reference signal mapping where the control circuitry adaptively decides the mapping of NR downlink reference signals based on real-time detection of LTE uplink reference signal presence. This dynamic adjustment allows the system to optimize spectrum utilization while preventing collisions by changing mapping behavior according to system conditions

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If reference signal mapping is not sufficiently standardized, then system flexibility is improved, but mapping accuracy deteriorates

Engineering Contradiction:

Improvesystem flexibilityVSAvoidmapping accuracy

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent applies preliminary action by having the control circuitry determine the mapping of NR downlink reference signals in advance, before actual transmission. The system pre-assesses the presence of LTE uplink reference signals and decides the appropriate mapping strategy beforehand, ensuring both flexibility and accuracy in the final mapping execution

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250184064A1Receiving device, transmitting device, receiving method, and transmitting method

Publication Date: 2025.06.05 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

In the present invention, a mobile station is provided with: a control circuit that, on the basis of information that can specify the disposition of a first reference signal in a first system, determines the disposition of a second reference signal in a second system; and a receiving circuit that receives the second reference signal on the basis of the determined disposition.