Uplink Transmission Cancellation with Protected Resources

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Solution Overview

Problem

Current solutions for uplink transmission cancellation in wireless communication systems do not effectively preserve critical uplink transmissions such as uplink control, sounding reference signals, and data transmissions, leading to inefficiencies in spectral usage and quality of service.

Innovation Solution

The proposed method involves configuring wireless devices to receive cancellation indications for uplink resources, determining protected resources that must not be cancelled, and cancelling transmissions only on resources not designated as protected.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If uplink transmission cancellation is implemented without protected resources, then spectral efficiency is improved by allowing cancellation of all uplink transmissions, but quality of service deteriorates because critical uplink transmissions (control, sounding reference signals, data) are not preserved

Engineering Contradiction:

Improvespectral efficiencyVSAvoidquality of service

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies local quality by differentiating between protected and non-protected uplink resources. Instead of uniformly treating all uplink transmissions the same, the system identifies specific resources (protected resources) that must be preserved and applies different cancellation behavior to different parts of the uplink spectrum. This allows spectral efficiency improvement through cancellation of non-critical transmissions while maintaining quality of service for critical transmissions on protected resources.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent segments uplink resources into protected and non-protected portions. The cancellation indication is processed to distinguish between these segments, allowing selective cancellation only on non-protected resources while preserving transmissions on protected resources. This segmentation enables the system to achieve both spectral efficiency (by cancelling unnecessary transmissions) and quality of service (by preserving critical transmissions).

Inventive Principle:

Principle #1Segmentation

2Device complexity

If cancellation indication uses coarse granularity, then implementation complexity is reduced, but harmful effects increase because critical transmissions cannot be selectively protected

Engineering Contradiction:

Improveimplementation complexityVSAvoidharmful effects of cancellation

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent overcomes the limitation of coarse granularity by introducing the concept of protected resources with specific characteristics (such as being associated with particular wireless devices, channels, or signal types). This allows the system to identify and protect locally significant transmissions even when the overall cancellation indication uses coarse time-frequency granularity. The protected resource identification mechanism enables selective protection without requiring fine-grained cancellation control.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12238707B2Methods of uplink transmission cancellation

Publication Date: 2025.02.25 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A method, system and apparatus for uplink transmission cancellation are disclosed. According to one aspect, a method includes receiving a cancellation indication of uplink resources to be cancelled, determining protected uplink resources to be protected from cancellation, and cancelling transmissions on uplink resources indicated to be cancelled other than uplink resources determined to be protected from cancellation.