Uplink Control Multiplexing Across Dual Transport Blocks in 5G

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Solution Overview

Problem

Existing methods for transmitting uplink control information (UCI) in 5G communication systems, inherited from LTE, fail to meet the diverse requirements of high-speed large-capacity and ultrahigh-reliability and low-latency communication services, such as URLLC, due to inadequate selection of transport blocks for UCI multiplexing.

Innovation Solution

A terminal device determines or is instructed by a base station to multiplex UCI in appropriate transport blocks based on priority, using criteria like modulation and coding scheme (MCS) rate, target error rate, or radio quality, ensuring high-priority UCI is transmitted in optimal blocks for reliability and efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If UCI is transmitted using the same method as LTE with two transport blocks, then communication compatibility is maintained, but the diverse requirements of 5G services (high-speed large-capacity and URLLC) cannot be satisfied

Engineering Contradiction:

Improveadaptability to diverse 5G communication servicesVSAvoidreliability of UCI transmission for different service types

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies local quality by assigning different transmission characteristics to different transport blocks based on their intended service type. High-priority UCI (e.g., HARQ-ACK for URLLC) is transmitted in transport blocks with higher reliability parameters, while low-priority UCI can use transport blocks optimized for throughput. This allows each transport block to have locally optimized quality parameters matching the specific service requirements.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements dynamics by enabling flexible selection and configuration of transport blocks based on real-time service requirements. The system can dynamically allocate UCI to different transport blocks, adjust transport block parameters, and change transmission strategies according to the specific needs of each service type (eMBB vs. URLLC), making the UCI transmission adaptable to varying communication conditions.

Inventive Principle:

Principle #15Dynamics

2Reliability

If UCI is multiplexed in transport blocks without optimized selection criteria, then transmission simplicity is maintained, but transmission reliability and efficiency deteriorate

Engineering Contradiction:

Improvereliability of UCI transmissionVSAvoidcomplexity of UCI multiplexing control

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-configuring transport blocks with specific parameters and characteristics before UCI multiplexing. The base station prepares multiple transport blocks with different reliability and throughput parameters in advance, and the terminal device can quickly select the appropriate transport block for UCI transmission based on pre-established selection criteria, avoiding complex real-time decisions while maintaining high reliability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements self-service by enabling the terminal device to autonomously select and multiplex UCI in appropriate transport blocks based on pre-configured parameters and simple selection rules. The terminal device independently determines which transport block to use for UCI transmission without requiring complex centralized control, reducing overall system complexity while ensuring reliable transmission.

Inventive Principle:

Principle #25Self-service

3Reliability

If high-priority UCI is transmitted without optimized transport block selection, then transmission speed is maintained, but error rate increases

Engineering Contradiction:

Improveerror rate of UCI transmissionVSAvoidtransmission efficiency of UCI

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies parameter changes by adjusting transport block parameters (such as modulation and coding scheme, resource allocation, and reliability parameters) based on the priority and type of UCI being transmitted. High-priority UCI is transmitted with optimized parameters that prioritize reliability, while the system dynamically adjusts parameters to maintain overall transmission efficiency. This allows the error rate to be reduced without significantly compromising transmission productivity.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20260020027A1Terminal device, base station device, control method, and computer-readable storage medium for efficient transmission of uplink control information

Publication Date: 2026.01.15 KDDI RES INC

AI summary

A terminal device receives an instruction to transmit user data to a base station device using a first transport block and a second transport block in parallel and receiving information to be used by the terminal device to identify in which of the first transport block and the second transport block uplink control information (UCI) to be transmitted together with the user data is to be multiplexed, identifies, upon receiving the instruction from the base station device, in which of the first transport block and the second transport block the UCI is to be multiplexed with the user data, based on the received information, and generates by multiplexing the user data and the UCI in the transport block identified for multiplexing the UCI, and transmits to the base station device, the first transport block and the second transport block.