Uplink Data Transmission Parameter Determination for 5G NR
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Solution Overview
Problem
In the context of 5G NR systems, there is a challenge in determining the UL TCI state and the SRS resource set associated with the PUSCH when the UL DCI and the PUSCH scheduled by the UL DCI are located in different application times, leading to ambiguity and potential failure in uplink data transmission.
Innovation Solution
A method and device for uplink data transmission in a terminal equipment, where the equipment determines relevant parameters for uplink data transmission within a second application time based on parameters indicated by third downlink control information and/or uplink transmission configuration indication states (UL TCI states) corresponding to the second application time, allowing for clear configuration of uplink data transmission based on either a single transmission and reception point (sTRP) or multiple transmission and reception points (mTRP).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UL DCI and the PUSCH scheduled by the UL DCI are located in different application times, then the system supports flexible scheduling and time-domain resource allocation, but ambiguity arises in determining the UL TCI state and SRS resource set associated with the PUSCH
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple UL TCI states and SRS resource sets in advance through RRC signaling before the actual PUSCH transmission occurs. When the UL DCI and PUSCH are in different application times, the terminal equipment can refer to these pre-configured parameters from the appropriate application time period, eliminating the need to determine them dynamically and thus avoiding ambiguity.
Solution Approach 2:
The patent segments the parameter determination process by application time. Different UL TCI states and SRS resource sets are associated with different application times (first application time for UL DCI, second application time for PUSCH). The terminal equipment selects parameters based on the specific application time of the PUSCH, creating a segmented approach that resolves the ambiguity caused by跨-time scheduling.
2Speed
If parameters for uplink data transmission are determined based on the first application time (UL DCI time), then the scheduling response is fast, but the parameters may be invalid or ambiguous when the PUSCH is transmitted in a different application time
Solution Approach 1:
The patent applies dynamics by making the parameter selection adaptive to the application time. Instead of using fixed parameters from the UL DCI time, the terminal equipment dynamically selects UL TCI states and SRS resource sets based on the PUSCH's application time. This dynamic approach ensures parameters remain valid and appropriate for the actual transmission time while maintaining fast scheduling through DCI-based indication.
3Loss of information
If the system configures multiple UL TCI states and SRS resource sets for different application times, then parameter ambiguity is resolved, but the configuration complexity increases
Solution Approach 1:
The patent applies universality by designing a unified RRC configuration framework that handles multiple UL TCI states and SRS resource sets across different application times. The same configuration structure and selection mechanism serve both single-application-time and multi-application-time scenarios, reducing the need for separate configuration procedures and minimizing the perceived complexity despite the enhanced functionality.
Data Source
AI summary
An uplink data transmitting device configured in a terminal equipment, wherein the terminal equipment is configured with two SRS resource sets, includes: a first receiver configured to receive third downlink control information for scheduling uplink data within a first application time, wherein at least part of the uplink data is within a second application time; and a first transmitter configured to determine to perform a first uplink data transmission based on a single transmission and reception point (sTRP) or perform a second uplink data transmission based on multiple transmission and reception points (mTRP) for the uplink data within the second application time, according to one or more parameters indicated by the third downlink control information; wherein the uplink data comprises at least one of uplink data types: an uplink repetition (PUSCH repetition) type A; an uplink repetition (PUSCH repetition) type B; or PUSCHs simultaneously transmitted with a multi-panel transmission scheme.