Multi-TRP Configured Grant PUSCH Repetition for FR2 Blocking
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Solution Overview
Problem
Existing configured grant (CG) based Physical Uplink Shared Channel (PUSCH) transmission in NR is limited to a single Transmission/Reception Point (TRP), which does not effectively address channel blocking issues in multiple TRP deployments, particularly in Frequency Range 2 (FR2).
Innovation Solution
The method involves configuring CG based PUSCH transmissions with repetitions towards multiple TRPs by mapping different TRPs to distinct CG PUSCH occasions, applying per TRP based Redundancy Version (RV) allocation, frequency hopping, and other per TRP configurations such as Modulation and Coding Scheme (MCS), resource allocation, and layer precoding, 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 reduced, but the reliability deteriorates due to channel blocking issues in multiple TRP deployments
Solution Approach 1:
The patent segments the CG PUSCH transmission by mapping different Transmission/Reception Points (TRPs) to distinct PUSCH occasions. This allows the transmission to be divided into multiple independent segments, each targeting a specific TRP, thereby improving reliability through diversity while managing complexity through structured segmentation
Solution Approach 2:
The patent introduces a new dimension to CG PUSCH transmission by enabling multi-TRP operation through time-domain multiplexing of PUSCH occasions. This dimensional expansion from single-TRP to multi-TRP transmission provides spatial diversity without fundamentally complicating the underlying transmission mechanism
2Adaptability or versatility
If PUSCH transmissions are distributed across multiple TRPs, then the diversity is enhanced, but the device complexity increases due to per TRP configurations
Solution Approach 1:
The patent applies local quality by implementing per-TRP configurations including separate Redundancy Version (RV) allocation, frequency hopping parameters, Modulation and Coding Scheme (MCS), resource allocation, and layer precoding for each TRP. This allows each TRP to be optimized independently while maintaining overall system coherence
Solution Approach 2:
The patent introduces dynamic elements through per-TRP RV allocation and frequency hopping mechanisms that adapt transmission parameters based on the specific TRP being targeted. This dynamic adaptation enhances diversity while the structured approach to parameter management keeps device complexity manageable
3Reliability
If per TRP based RV allocation and frequency hopping are applied, then the link adaptation is improved, but the processing complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring RV sequences and frequency hopping parameters for each TRP before transmission begins. This allows the system to prepare all necessary transmission parameters in advance, improving link adaptation while reducing real-time processing complexity during actual transmission
Solution Approach 2:
The patent utilizes parameter changes through per-TRP RV allocation and frequency hopping to improve link adaptation. By systematically varying transmission parameters such as redundancy versions and frequency locations based on TRP-specific configurations, the system achieves better link adaptation without requiring complex real-time decision-making
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.