mTRP RACH PUSCH Configuration for Overlapping Uplink Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in 5G NR, there is a need to improve the configuration of physical uplink shared channel (PUSCH) transmission for random access messages in multiple transmit/receive point (mTRP) scenarios, where overlapping PUSCHs complicate the transmission process.
Innovation Solution
A user equipment (UE) and network node are configured to utilize SRS resource sets and closed loop indices to manage the transmission of overlapping PUSCHs carrying random access messages, based on parameters associated with control resource sets (CORESETs) to differentiate between TRPs and optimize transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple PUSCH transmissions are scheduled to overlap in time domain for mTRP transmission, then transmission reliability is improved through diversity, but transmission management complexity increases due to resource set differentiation requirements
Solution Approach 1:
The patent segments the SRS resources into multiple distinct resource sets, where each resource set is associated with a specific TRP. This segmentation allows the UE to differentiate between overlapping PUSCH transmissions destined for different TRPs, managing complexity through structured resource allocation while maintaining reliability through multi-TRP diversity
Solution Approach 2:
The patent applies local quality by assigning specific SRS resource sets to specific TRPs, creating localized resource configurations. Each TRP has its own dedicated SRS resource set, allowing differentiated management of transmissions to different TRPs while maintaining overall system reliability through the multi-TRP approach
2Measurement precision
If SRS resource sets are configured for different TRPs to differentiate overlapping PUSCH transmissions, then transmission differentiation is improved, but signaling overhead increases due to additional resource set indications
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple SRS resource sets associated with different TRPs before the actual PUSCH transmission occurs. The UE is provided with indications of which resource sets to use in advance, allowing differentiation of overlapping transmissions without requiring complex real-time signaling decisions, thus reducing signaling overhead while maintaining precise transmission differentiation
Data Source
AI summary
The UE configured with a multi-DCI based mTRP transmission may be configured to obtain a first SRS resource set associated with a first PUSCH carrying a random access message to be transmitted to a network node, the first PUSCH being scheduled to overlap at least in part with a second PUSCH in a time domain, and transmit or refrain from transmitting, to a network node, the first PUSCH based on the first SRS resource set and a second SRS resource set associated with the second PUSCH. The UE may also obtain a closed loop index associated with a first PUSCH carrying a random access message to be transmitted to a network node, and transmit, to the network node, the first PUSCH carrying the random access message based on the closed loop index.