Dynamic TDRA Configuration for URLLC on Unlicensed Bands

Solution Overview

Problem

Existing systems face challenges in configuring time domain resource allocation (TDRA) for ultra-reliable low-latency communication (URLLC) on unlicensed frequency bands, leading to issues with reliability, transmission chances, and scheduling flexibility.

Innovation Solution

The proposed solution involves methods and devices for configuring TDRA to transmit dynamic grant physical uplink shared channel (PUSCH) signals, offering high flexibility by supporting dynamic configuration of repetition, multiple scheduling gaps, and combinations thereof, specifically designed for URLLC operations in unlicensed frequency bands.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing TDRA configuration methods are used for URLLC on unlicensed bands, then basic communication functionality is maintained, but reliability and transmission chances are insufficient

Engineering Contradiction:

ImproveURLLC reliabilityVSAvoidscheduling flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamic TDRA configuration where the network can flexibly adjust time domain resource allocation parameters (such as K2 values, slot offsets, and repetition numbers) based on real-time channel conditions and traffic requirements. This dynamic adaptation enables the system to optimize reliability by selecting appropriate repetition schemes and timing configurations, while simultaneously maintaining scheduling flexibility to respond to varying URLLC demands on unlicensed bands.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent introduces multiple configurable parameters for TDRA including K2 offset values, slot configuration parameters, and repetition numbers that can be dynamically adjusted. By changing these parameters based on channel quality, interference levels, and traffic patterns, the system achieves both improved reliability through adaptive repetition schemes and maintained scheduling flexibility for diverse URLLC applications on unlicensed frequency bands.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If existing TDRA configuration methods are used for URLLC on unlicensed bands, then basic transmission is possible, but transmission chances are limited

Engineering Contradiction:

Improvetransmission chancesVSAvoidconfiguration complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the TDRA configuration into multiple independent parameters including K2 offset, slot configuration, and repetition numbers. This segmentation allows the network to independently optimize each parameter for maximizing transmission chances, while the modular structure manages configuration complexity by enabling selective configuration of individual parameters based on specific URLLC requirements rather than requiring complete reconfiguration.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent creates a universal TDRA configuration framework that can accommodate multiple URLLC transmission scenarios including different repetition schemes, slot configurations, and timing arrangements through a unified parameter set. This multi-functional approach increases transmission chances by providing diverse configuration options while managing complexity through standardized parameter definitions and configuration procedures applicable across different URLLC use cases.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If existing TDRA configuration methods are used for URLLC on unlicensed bands, then basic scheduling is maintained, but scheduling flexibility is reduced

Engineering Contradiction:

Improvescheduling flexibilityVSAvoidURLLC reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements dynamic TDRA configuration where the network can flexibly adjust time domain resource allocation parameters (such as K2 values, slot offsets, and repetition numbers) based on real-time channel conditions and traffic requirements. This dynamic adaptation enables the system to optimize reliability by selecting appropriate repetition schemes and timing configurations, while simultaneously maintaining scheduling flexibility to respond to varying URLLC demands on unlicensed bands.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent introduces multiple configurable parameters for TDRA including K2 offset values, slot configuration parameters, and repetition numbers that can be dynamically adjusted. By changing these parameters based on channel quality, interference levels, and traffic patterns, the system achieves both improved reliability through adaptive repetition schemes and maintained scheduling flexibility for diverse URLLC applications on unlicensed frequency bands.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP4104573B1Methods and devices for configuring time domain resource allocation

Publication Date: 2025.06.18 ZTE CORP

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AI summary

Method, systems and devices for configuring time domain resource allocation (TDRA) of a physical uplink shared channel (PUSCH) for a user equipment. The method includes receiving, by the user equipment, a radio resource control (RRC), the RRC configuring a TDRA type corresponding to a TDRA table. Another method includes sending, by a network base station, a RRC configuring a TDRA type corresponding to a TDRA table for the user equipment.