Type-3 HARQ-ACK Codebook Uplink Conflict Handling Across DCI Formats

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Solution Overview

Problem

Existing solutions in NR Rel-16 are limited in facilitating DCI format 1_1 for triggering Type-3 HARQ-ACK codebook transmission, restricting flexibility and efficiency in HARQ-ACK codebook triggering.

Innovation Solution

Enhance Type-3 HARQ-ACK codebook transmission by allowing DCI formats 0_1, 0_2, and 1_2 to trigger the codebook, enabling transmission via PUCCH or PUSCH, and implementing prioritization or multiplexing procedures for uplink resource conflicts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If DCI format 1_1 is used for triggering Type-3 HARQ-ACK codebook transmission, then the transmission can be initiated, but the flexibility and efficiency in codebook triggering are restricted

Engineering Contradiction:

Improveflexibility in codebook triggeringVSAvoidlimitation in DCI format options

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent extends the triggering capability of Type-3 HARQ-ACK codebook from DCI format 1_1 only to multiple DCI formats (0_1, 0_2, 1_2, and 1_1). This multi-functionality approach allows different DCI formats to serve the same triggering purpose, significantly improving the flexibility and adaptability of codebook triggering while maintaining system manageability

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If multiple DCI formats are allowed to trigger Type-3 HARQ-ACK codebook, then flexibility and efficiency improve, but conflict resolution complexity increases

Engineering Contradiction:

Improveefficiency in codebook transmissionVSAvoidconflict resolution mechanisms

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent introduces priority parameters associated with different DCI formats and uplink channels (PUCCH/PUSCH). By assigning different priority levels to different triggering scenarios, the system enables efficient conflict resolution when multiple uplink transmissions overlap in time, allowing faster and more automated decision-making in resource allocation

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements dynamic conflict resolution mechanisms where the system can adaptively select transmission resources based on real-time conditions. When uplink resource conflicts are detected, the system dynamically applies prioritization or multiplexing procedures, making the resource allocation flexible and responsive to current network conditions rather than following rigid predefined rules

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12531668B2Enhanced one-shot HARQ-ACK codebook transmission

Publication Date: 2026.01.20 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

According to some embodiments, a method performed by a wireless device for transmitting a Type-3 hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook comprises receiving downlink control information (DCI) requesting a Type-3 HARQ-ACK codebook, wherein the DCI request is of a DCI format other than DCI format 1_1 for a physical downlink shared channel (PDSCH) transmission, and based on the DCI request, transmitting the Type-3 HARQ-ACK codebook to a network node.