URLLC UCI Multiplexing on eMBB PUSCH via Dynamic RE Mapping
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Solution Overview
Problem
Current HARQ-ACK multiplexing methods on the eMBB PUSCH are not suitable for ultra-reliable low-latency communication (URLLC) due to limitations in flexibility and efficiency, particularly in handling collisions between URLLC PUCCH and eMBB PUSCH, leading to unsatisfied timing requirements and undefined UE behavior.
Innovation Solution
A method for determining an ultra-reliable low-latency communication (URLLC) uplink control information (UCI) multiplexing starting symbol on an enhanced mobile broadband (eMBB) physical uplink shared channel (PUSCH) and resource element (RE) mapping, allowing for efficient multiplexing of URLLC UCI on the eMBB PUSCH, including approaches such as puncturing and DMRS self-contained structure, to support URLLC HARQ-ACK reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current HARQ-ACK multiplexing methods on eMBB PUSCH are used, then device complexity is reduced, but URLLC reliability and timing requirements are not satisfied
Solution Approach 1:
The patent segments the PUSCH transmission into multiple parts: DMRS symbols for reference, punctured symbols for URLLC UCI multiplexing, and remaining symbols for eMBB data. This segmentation allows different regions to serve different purposes, ensuring URLLC reliability while managing complexity through structured organization of resources.
Solution Approach 2:
The patent introduces DMRS (demodulation reference signals) as an intermediary element that facilitates the multiplexing process. The DMRS self-contained structure acts as a mediator between URLLC UCI and eMBB PUSCH, enabling reliable detection and decoding of multiplexed signals while maintaining system reliability.
2Productivity
If URLLC PUCCH and eMBB PUSCH collide, then resource utilization increases, but timing requirements are not satisfied and UE behavior is undefined
Solution Approach 1:
The patent performs preliminary actions by determining the UCI multiplexing starting symbol and establishing the RE mapping pattern before actual transmission. The gNB and UE pre-agree on the puncturing pattern and DMRS structure, ensuring that timing requirements are met and UE behavior is well-defined even when collisions occur.
Solution Approach 2:
The patent introduces dynamic adaptability through configurable parameters such as the UCI multiplexing starting symbol position and the puncturing pattern. These dynamic elements allow the system to adjust to different collision scenarios while maintaining timing requirements and defined UE behavior.
3Adaptability or versatility
If flexibility is improved in handling URLLC eMBB collisions, then adaptability increases, but device complexity increases
Solution Approach 1:
The patent employs parameter changes to achieve flexibility, specifically by allowing configuration of the UCI multiplexing starting symbol position and puncturing patterns. These parameter adjustments provide adaptability for different collision scenarios without requiring complex processing logic, as the changes are applied through standardized procedures.
Data Source
AI summary
A user equipment (UE) is described. The UE a higher layer processor configured to determine an ultra-reliable low-latency communication (URLLC) uplink control information (UCI) multiplexing starting symbol on an enhanced mobile broadband (eMBB) physical uplink shared channel (PUSCH). The higher layer processor is also configured to determine a resource element (RE) mapping for URLLC UCI multiplexing on the eMBB PUSCH from the UCI multiplexing starting symbol. The UE also includes transmitting circuitry configured to perform multiplexing of the URLLC UCI on the eMBB PUSCH based on the RE mapping.