Uplink Preemption Capability Signaling in Wireless Systems

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing uplink and downlink preemption capabilities in base stations without increasing signaling overhead and reducing spectral efficiency.

Innovation Solution

The system allows wireless devices to indicate their uplink and downlink preemption capabilities to the base station, which assigns specific Radio Network Temporary Identifiers (RNTIs) for each capability. The base station then includes a preemption indicator in the Downlink Control Information (DCI) to manage preemption effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the base station uses separate RNTIs for uplink and downlink preemption, then the preemption capability differentiation is improved, but the signaling overhead increases

Engineering Contradiction:

Improvepreemption capability differentiationVSAvoidsignaling overhead

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the preemption indication mechanism by introducing separate RNTIs (UL RNTI and DL RNTI) for uplink and downlink preemption capabilities. This segmentation allows the base station to differentiate and manage preemption capabilities for different directions independently, improving adaptability while maintaining clear separation of functions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements a unified capability indication mechanism where the wireless device reports both uplink and downlink preemption capabilities through a single capability message. The base station then utilizes these capabilities across multiple preemption scenarios (uplink preemption, downlink preemption, and preempted communication) making the system versatile while avoiding redundant signaling.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If the base station implements comprehensive preemption management, then the wireless communication efficiency is improved, but the spectral efficiency decreases

Engineering Contradiction:

Improvewireless communication efficiencyVSAvoidspectral efficiency

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The patent applies preliminary action by having the wireless device report its preemption capabilities (both uplink and downlink) in advance during the capability exchange phase. The base station stores these capability indications and uses them when configuring preemption parameters, eliminating the need for real-time capability detection and reducing control signaling during active communication.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback mechanisms where the base station sends configuration parameters to the wireless device based on the reported capabilities, and the wireless device feeds back its supported preemption types. This feedback loop enables efficient preemption management while minimizing unnecessary signaling by only exchanging capability information when needed.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250031208A1Wireless Communications for Uplink Cancelation

Publication Date: 2025.01.23 OFINNO LLC

AI summary

Systems, apparatuses, and methods are described for wireless communications. Wireless devices may have different capabilities for uplink cancelation. A base station may communicate with a wireless device to determine a capability, of the wireless device, for uplink cancelation. The wireless device may receive downlink control information indicating, based on the determined capability for uplink cancelation, an uplink cancelation.