Multi-TRP PUSCH Transmission via SRS Resource Segmentation
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Solution Overview
Problem
Current 5G NR network standards do not adequately address the configuration and activation of multiple sounding reference signal (SRS) resources corresponding to multiple transmission and reception points (TRPs) in a multi-TRP operation, which affects the reliability and efficiency of physical uplink shared channel (PUSCH) transmissions.
Innovation Solution
The proposed solution involves configuring a user equipment (UE) with multiple SRS resource sets corresponding to multiple TRPs and transmitting downlink control information (DCI) that includes an enhanced SRS resource indicator (SRI) to select the appropriate resources for PUSCH transmissions to each TRP, enabling efficient operation between multi-TRP and single-TRP modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple SRS resources are configured for multi-TRP operation, then the reliability and throughput of PUSCH transmissions are improved, but the device complexity and configuration management burden increase
Solution Approach 1:
The patent segments the SRS resource configuration into separate sets, where each set corresponds to a specific TRP. This allows the UE to manage multiple TRPs independently by configuring and selecting from distinct resource sets rather than managing a single large pool of resources, thereby reducing the complexity of multi-TRP coordination while maintaining improved reliability through diversified transmission paths.
2Productivity
If multiple PUSCH transmissions are scheduled for multi-TRPs, then the throughput is improved, but the risk of transmission collisions and resource conflicts increases
Solution Approach 1:
The patent applies local quality by assigning distinct SRS resource sets to different TRPs, allowing each TRP to have its own dedicated resource configuration. This ensures that PUSCH transmissions to different TRPs use different SRS resources, eliminating collisions between simultaneous transmissions to multiple TRPs while maintaining high throughput through parallel transmissions.
3Adaptability or versatility
If dynamic switching between multi-TRP and single-TRP modes is enabled, then the adaptability is improved, but the control complexity and signaling overhead increase
Solution Approach 1:
The patent implements dynamics by enabling the UE to switch between multi-TRP and single-TRP operation modes based on real-time channel conditions and network requirements. The system dynamically activates or deactivates specific TRPs and adjusts SRS resource selections accordingly, providing flexible adaptation to varying network conditions while managing complexity through conditional activation rather than always maintaining full multi-TRP capability.
Data Source
AI summary
A user equipment (UE) is configured to communicate with one or more transmission and reception points (TRPS). The UE receives a sounding reference signal (SRS) resource set configuration including a first resource set corresponding to a first transmission and reception point (TRP) and a second resource set corresponding to a second TRP, receives a downlink control information (DCI) transmission including an SRS resource indicator (SRI) indicating (i) which resource from the first resource set should be selected for a first physical uplink shared channel (PUSCH) transmission to a first TRP, and (ii) which resource from the second resource set should be selected for a second PUSCH transmission to a second TRP and transmits the first PUSCH transmission to the first TRP and the second PUSCH transmission to the second TRP.