PUSCH UCI Multiplexing with Multiple Code Words and MCS Mapping

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently multiplexing uplink control information (UCI) on a physical uplink shared channel (PUSCH) when there are less than two transport blocks (TBs) or when different transmission parameters are involved, leading to uncertainties in resource allocation and UCI mapping.

Innovation Solution

The method involves determining time and frequency resources for multiplexing UCI on PUSCH based on received signaling, using at least two modulation and coding schemes (MCSs) indicated by downlink control information (DCI), enabling flexible resource allocation and reliable UCI delivery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple code words are scheduled by DCI with less than two transport blocks, then resource utilization is improved, but uncertainty in resource allocation and UCI mapping increases

Engineering Contradiction:

Improveresource utilizationVSAvoidresource allocation certainty

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies parameter changes by dynamically selecting between different modulation and coding schemes (MCSs) based on the number of transport blocks. When less than two TBs are scheduled, the system changes the MCS parameters to appropriately handle UCI multiplexing, thereby resolving the uncertainty in resource allocation while maintaining improved resource utilization.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system implements dynamics by making the resource allocation and UCI mapping adaptive to the actual number of transport blocks scheduled. The DCI dynamically indicates which MCS to use based on the scheduling scenario, allowing the system to flexibly adjust to varying conditions while maintaining reliability.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If multiple MCSs are indicated for PUSCH with less than two TBs, then UCI multiplexing flexibility is improved, but system complexity increases

Engineering Contradiction:

ImproveUCI multiplexing flexibilityVSAvoidsystem complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the UCI multiplexing process into distinct cases based on the number of transport blocks. Different MCS configurations are prepared for different scenarios (1 TB vs. 2 TBs), which segments the complexity into manageable parts rather than requiring a single complex solution for all cases.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system uses copying by reusing the MCS indication mechanism from standard PUSCH scheduling and adapting it for UCI multiplexing scenarios. The same DCI structure and MCS tables are copied and applied, minimizing additional complexity while achieving the desired flexibility.

Inventive Principle:

Principle #26Copying

Data Source

PatentUS20250380258A1Uplink control information multiplexing on physical uplink shared channel with multiple code words

Publication Date: 2025.12.11 QUALCOMM INC

AI summary

Certain aspects of the present disclosure provide a method for wireless communication by a user equipment (UE), generally including receiving signaling enabling at least two code words (CWs) to be scheduled by a downlink control information (DCI), receiving a DCI scheduling a physical uplink shared channel (PUSCH) with less than two uplink (UL) transport blocks (TBs) with data wherein the DCI indicates at least two modulation and coding schemes (MCSs) for the PUSCH, determining time and frequency resources for multiplexing uplink control information (UCI) in the PUSCH; and transmitting the PUSCH with UCI multiplexed in accordance with the determination.