ULCI Processing for RedCap UEs Using Relaxed Timelines

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Solution Overview

Problem

Current wireless communication systems, particularly in 5G NR and LTE, face challenges in efficiently managing uplink cancellation indications (ULCI) for reduced capability (RedCap) UEs, leading to stringent timelines and limited flexibility in applying ULCI to various uplink transmissions, which can result in scheduling conflicts and reduced coverage.

Innovation Solution

The proposed solution involves processing ULCI with a more relaxed timeline and expanded time spans for RedCap UEs, allowing for flexible application across multiple repetitions and including additional uplink channels like PUSCH, PUCCH, and PRACH, with specific parameters defined for each UE type to prioritize and manage uplink resources effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a standard ULCI timeline is applied to RedCap UEs, then scheduling efficiency is maintained, but coverage is limited and scheduling conflicts occur

Engineering Contradiction:

ImprovecoverageVSAvoidULCI processing timeline

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies parameter changes by introducing type-specific ULCI processing parameters for RedCap UEs, including extended cancellation window sizes and modified timing relationships. These parameter adjustments allow RedCap UEs to process ULCI with more relaxed timelines, improving coverage and reducing scheduling conflicts while maintaining network-wide scheduling efficiency.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If ULCI is applied to multiple uplink channels for RedCap UEs, then flexibility is improved, but device complexity increases

Engineering Contradiction:

ImproveULCI application flexibilityVSAvoidUE processing complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing ULCI processing into type-specific segments: standard UEs follow existing processing rules, while RedCap UEs follow extended rules with larger cancellation windows and additional channel applications. This segmentation allows flexibility improvement for RedCap UEs across multiple uplink channels (PUSCH, PUCCH, PRACH) while isolating the complexity increase to only the affected UE type.

Inventive Principle:

Principle #1Segmentation

3Reliability

If type-specific ULCI parameters are implemented, then scheduling conflicts are reduced, but system complexity increases

Engineering Contradiction:

Improvescheduling conflict reductionVSAvoidparameter management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies local quality by implementing different ULCI processing characteristics for different UE types. RedCap UEs receive type-specific parameters including extended cancellation windows and modified timing relationships, while standard UEs continue using existing parameters. This localized differentiation reduces scheduling conflicts for RedCap UEs without imposing the same complexity burden on the entire system.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20240023093A1ULCI enhancement for reduced capability ue

Publication Date: 2024.01.18 QUALCOMM INC

AI summary

Certain aspects of the present disclosure provide techniques for enhancements made to uplink cancellation indications (ULCIs) for specific user equipment (UE) types (e.g., a reduced capability (RedCap) UE). An example method by a user UE generally includes receiving an UL CI indicating resources on which one or more uplink transmissions are to be modified by the UE, and processing the ULCI in accordance with a first set of one or more parameters for ULCI processing specific to UEs of a first type.