Configured-Grant PUSCH Across Multiple TRPs for Blocking Resilience
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Solution Overview
Problem
Existing configured grant (CG)-based Physical Uplink Shared Channel (PUSCH) transmission systems are limited to transmitting repetitions towards a single Transmission/Reception Point (TRP), which is inadequate for improving diversity and reliability in the presence of channel blocking, particularly in Frequency Range 2 (FR2).
Innovation Solution
The proposed method enables CG-based PUSCH transmission to multiple TRPs by mapping different TRPs to distinct transmission occasions, applying per-TRP Redundancy Version (RV) allocation, frequency hopping, and configuring various parameters separately for each TRP, including MCS, resource allocation, and beam management, while handling collisions and beam updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CG-based PUSCH transmission is limited to a single TRP, then the system complexity is low, but the reliability and diversity are insufficient in the presence of channel blocking
Solution Approach 1:
The patent segments the PUSCH transmission by dividing it into multiple transmission occasions directed to different TRPs. Each transmission occasion is independently configured with TRP-specific parameters including spatial relation info, power control parameters, and redundancy versions. This segmentation enables diversity transmission without requiring complete system redesign, thus improving reliability while controlling complexity.
Solution Approach 2:
The patent extends the transmission dimension from a single TRP to multiple TRPs by introducing spatial diversity. Transmission occasions are mapped to different TRPs using cyclic or sequential patterns, adding a spatial dimension to the transmission scheme. This dimensional expansion provides diversity against channel blocking while maintaining manageable system complexity through structured mapping rules.
2Reliability
If PUSCH repetitions are transmitted towards multiple TRPs, then diversity is improved, but the configuration complexity and parameter management become more difficult
Solution Approach 1:
The patent applies local quality by configuring TRP-specific parameters for each transmission occasion, including spatial relation information, power control parameters (P0, alpha), and redundancy versions. Each TRP receives customized configuration tailored to its channel characteristics, improving diversity performance while maintaining systematic configuration management through parameter sets.
Solution Approach 2:
The patent employs periodic transmission patterns where PUSCH repetitions are systematically distributed across multiple TRPs using cyclic or sequential mapping. This periodic structure regularizes the configuration management, making it easier to handle multiple TRPs by establishing predictable patterns rather than ad-hoc configurations.
3Reliability
If a single RV sequence is used for multiple TRPs, then the configuration is simple, but the link adaptation performance is suboptimal
Solution Approach 1:
The patent implements local quality by assigning TRP-specific redundancy version sequences optimized for each TRP's channel conditions. Each TRP can use independently configured RV sequences from the set {0, 1, 2, 3}, enabling tailored link adaptation. This approach improves reliability through optimized error correction while managing complexity through standardized RV sequence selection from predefined sets.
Data Source
AI summary
Systems and methods of the present disclosure are directed to a method performed by a wireless communication device. The method includes receiving, from a network node, information that configures the wireless communication device for a Configured Grant (CG) based Physical Uplink Shared Channel (PUSCH) transmission with PUSCH repetitions towards two or more transmissions/reception points (TRPs). The method includes performing the CG based PUSCH transmission with PUSCH repetitions towards the multiple TRPs in accordance with the received information.