Multi-Panel Uplink Control for Overlapping PUCCH and PUSCH

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Solution Overview

Problem

Future radio communication systems face challenges in appropriately controlling uplink (UL) transmission using multiple panels, which can lead to degradation in system performance such as throughput reduction, particularly in scenarios involving simultaneous UL transmission across multiple transmission/reception points (TRPs).

Innovation Solution

A terminal is equipped with a control section that determines appropriate mapping of uplink control information (UCI) to physical uplink shared channels (PUSCH) when there is an overlap in time resources, and a transmitting section that transmits these channels accordingly, even when using multiple panels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If simultaneous UL transmission using multiple panels is supported, then UL throughput is improved, but control complexity increases

Engineering Contradiction:

ImproveUL throughputVSAvoidcontrol complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the uplink transmission control by associating each PUSCH with a specific CORESET pool index (0 or 1), allowing independent control and mapping decisions for each panel while maintaining overall system coordination

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a new dimension of control by adding CORESET pool index as an additional parameter for UCI mapping decisions, transforming the control mechanism from simple time-resource based mapping to a multi-dimensional control that includes panel identification

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Reliability

If UCI mapping is determined for overlapping PUSCHs from different CORESET pool indices, then transmission reliability is improved, but processing complexity increases

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidprocessing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent establishes preliminary mapping rules that determine in advance which PUSCH should carry UCI based on CORESET pool index comparison, allowing the terminal to make deterministic decisions without complex real-time processing when overlaps occur

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Instead of allowing flexible UCI mapping to any overlapping PUSCH, the patent inverts the approach by restricting UCI mapping to a specific PUSCH determined by CORESET pool index comparison, simplifying the control logic through constraint

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentEP4686293A1Terminal, wireless communication method, and base station

Publication Date: 2026.01.28 NTT DOCOMO INC

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Figure 2A~2B
Figure 3A~3C

AI summary

A terminal according to an aspect of the present disclosure includes: a control section that determines, in a case where at least two of a physical uplink control channel (PUCCH) corresponding to a first control resource set (CORESET) pool index, a first physical uplink shared channel (PUSCH) corresponding to the first CORESET pool index, and a second PUSCH corresponding to a second CORESET pool index have an overlap at least in a same time resource, a PUSCH that uplink control information (UCI) related to the PUCCH is to be mapped to; and a transmitting section that transmits at least one of the first PUSCH and the second PUSCH. An aspect of the present disclosure enables UL transmission using a plurality of panels to be appropriately performed.