PUCCH UCI Multiplexing for Overlap Delay Reduction

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Solution Overview

Problem

In 5G NR Rel-16, overlapping PUCCHs carrying HARQ-ACKs and other UCI types lead to increased transmission delay and reduced performance due to time-division multiplexing, where multiple PUCCHs are combined on a single channel, affecting the original transmission characteristics.

Innovation Solution

A method to select a target UCI from non-overlapping PUCCHs and multiplex it with a second UCI, ensuring timely transmission and maintaining performance by applying specific multiplexing rules and conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If multiple PUCCHs carrying HARQ-ACKs are transmitted in one slot using time-division multiplexing, then the transmission capacity is improved, but when these PUCCHs overlap with PUCCHs carrying other UCI types, the transmission delay increases and transmission performance deteriorates

Engineering Contradiction:

Improvetransmission capacityVSAvoidtransmission delay

Core Design Contradiction:

Quantity of substanceVSLoss of time

Solution Approach 1:

The patent segments the handling of overlapping PUCCHs by identifying a target PUCCH from multiple first PUCCHs that do not overlap in time domain. By selecting one specific PUCCH as the target for multiplexing with the second PUCCH, the system avoids multiplexing all first PUCCHs, thereby reducing transmission delay while maintaining transmission capacity.

Inventive Principle:

Principle #1Segmentation

2Quantity of substance

If multiple PUCCHs carrying HARQ-ACKs are transmitted in one slot using time-division multiplexing, then the transmission capacity is improved, but the transmission performance is reduced due to higher transmission code rate

Engineering Contradiction:

Improvetransmission capacityVSAvoidtransmission performance

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent segments the multiplexing operation to occur only between the selected target PUCCH and the second PUCCH, rather than multiplexing all first PUCCHs together. This selective approach minimizes the increase in transmission code rate and preserves the transmission performance of non-target first PUCCHs.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If all first PUCCHs are multiplexed with the second PUCCH, then the resource conflict is resolved, but the transmission delay increases and performance deteriorates

Engineering Contradiction:

Improveresource conflict resolutionVSAvoidtransmission delay

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent applies segmentation by selecting only one target PUCCH from the multiple first PUCCHs to be multiplexed with the second PUCCH. The non-target first PUCCHs are transmitted independently without multiplexing, thereby resolving resource conflicts selectively while minimizing transmission delay.

Inventive Principle:

Principle #1Segmentation

4Quantity of substance

If a PUCCH resource for multiplexing has longer transmission duration or later starting position, then more UCI can be accommodated, but the transmission delay increases

Engineering Contradiction:

ImproveUCI capacityVSAvoidtransmission delay

Core Design Contradiction:

Quantity of substanceVSLoss of time

Solution Approach 1:

The patent segments the UCI transmission by allowing non-target first PUCCHs to be transmitted on their original resources with original timing characteristics. Only the target PUCCH is multiplexed with the second PUCCH, thereby accommodating necessary UCI capacity while minimizing the impact on transmission delay for the majority of PUCCHs.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12574928B2Uplink control information transmission method and device, terminal and base station

Publication Date: 2026.03.10 DATANG MOBILE COMM EQUIP CO LTD

AI summary

An Uplink Control Information UCI transmission method, a UCI transmission device, a terminal, and a base station are provided. The method includes: selecting one of a plurality of first UCIs as a target UCI, when there are a plurality of transmissions of first UCIs, a plurality of Physical Uplink Control Channels PUCCHs respectively carrying the first UCI do not overlap in time domain, and all of the plurality of PUCCHs carrying the first UCI overlap with a PUCCH carrying a second UCI in time domain; multiplexing the target UCI and the second UCI.