Multi-TRP PUSCH Repetition with Single DCI Scheduling
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Solution Overview
Problem
Current 5G NR systems rely on single-TRP PUSCH repetition, which is unreliable when links between User Equipment (UE) and TRPs are affected by blockage, especially in FR2, necessitating improved robustness and reliability for PUSCH transmission.
Innovation Solution
Implementing single DCI based multi-TRP PUSCH repetition with independent or unique indicators for each TRP, including spatial relation, precoder, power control, and SRS Resource Indicator (SRI) to enhance performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If single-TRP PUSCH repetition is used, then device complexity is reduced, but reliability deteriorates when links are blocked
Solution Approach 1:
The patent segments the PUSCH transmission into multiple independent repetition instances, each can be associated with different TRPs. This allows the system to divide the transmission task across multiple TRPs, improving reliability when one TRP is blocked while maintaining manageable complexity through structured repetition mechanisms
Solution Approach 2:
The patent implements dynamic switching between single-TRP and multi-TRP operations based on channel conditions. The system can adaptively select which TRP(s) to use for transmission, transitioning from static single-TRP mode to dynamic multi-TRP mode depending on blockage detection and link quality, thereby optimizing reliability without always incurring the complexity of multi-TRP operation
2Reliability
If multi-TRP operation with independent indicators is implemented, then reliability is improved, but DCI size and processing complexity increase
Solution Approach 1:
The patent applies local quality by providing TRP-specific indicators only when needed for multi-TRP operation. Each TRP can have its own spatial relation, precoder, and power control parameters indicated in the DCI, allowing the system to customize transmission parameters for each TRP independently. This enables improved reliability through TRP-specific optimization while controlling complexity by only activating these additional indicators when multi-TRP mode is used
3Reliability
If single DCI based multi-TRP PUSCH repetition is implemented, then reliability is enhanced, but DCI size increases
Solution Approach 1:
The patent applies partial action by including only the necessary TRP-specific indicators in the DCI when multi-TRP operation is required. Rather than always transmitting complete multi-TRP configuration information, the system partially activates additional indicators only when needed, balancing the need for reliability enhancement with minimizing DCI size and information overhead
Data Source
AI summary
A wireless communication method includes receiving, by a wireless communication device, a scheduling grant that comprises a first indicator and a second indicator to schedule a plurality of uplink data transmission instances; and transmitting, by the wireless communication device, the plurality of uplink data transmission instances that correspond to at least one of a first resource set or a second resource set based on the first indicator and the second indicator.