Event-Triggered Waveform Switching to Reduce Signaling Overhead

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Solution Overview

Problem

Existing wireless communication systems face inefficiencies in waveform type switching due to high overhead signaling when transitioning between different waveform types, such as CP-OFDM and DFT-S-OFDM, which are beneficial in different scenarios.

Innovation Solution

A UE dynamically switches between waveform types based on detecting trigger events, selecting a waveform type from a set of options without requiring downlink signaling from the network entity, thereby reducing overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If waveform type switching is implemented using existing downlink signaling methods, then waveform type adaptability is improved, but signaling overhead increases

Engineering Contradiction:

Improvewaveform type adaptabilityVSAvoidsignaling overhead

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The UE autonomously determines waveform type switching based on locally detected trigger events (such as power headroom thresholds or buffer status) without requiring network entity instructions. This self-service mechanism eliminates the need for downlink signaling to control waveform switching, thereby reducing signaling overhead while maintaining adaptability to different transmission scenarios

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The network entity pre-configures the UE with a set of waveform types and trigger event conditions before communication begins. The UE uses these pre-configured parameters to make real-time waveform switching decisions based on current transmission conditions, avoiding the need for dynamic signaling during operation

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12439346B2Event-triggered waveform type selection

Publication Date: 2025.10.07 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communications are described. The method may include a user equipment (UE) transmitting a first signal using a first waveform type. After transmitting the first signal using the first waveform type, the UE may identify a trigger event for waveform type switching by the UE and select a waveform type from among a set of waveform types based on identifying the trigger event. The UE may then transmit a second signal using the selected waveform type.