UCI Multiplexing in Multi-TRP Multi-Panel 5G NR
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing uplink control information (UCI) multiplexing and timing control in multi-transmission-reception point (TRP) multi-panel operations, particularly in 5G new radio (NR) systems.
Innovation Solution
The proposed solution involves mechanisms for UCI multiplexing on physical uplink shared channels (PUSCH) and physical uplink control channels (PUCCH) in multi-TRP multi-panel operations, including explicit indication of TRP or panel indices in downlink control information (DCI) and association with control resource set (CORESET) pool indices, as well as procedures for handling collisions between PUSCH and PUCCH with different priorities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple TRPs are used for simultaneous uplink transmission to improve reliability, then the system complexity of timing control and UCI multiplexing increases
Solution Approach 1:
The patent segments the uplink transmission system by introducing separate timing advance values (TA1, TA2) for different TRPs and associating each TRP with specific panels. This segmentation allows independent timing control for each TRP while maintaining overall system coordination, resolving the complexity issue through structured division of control parameters.
Solution Approach 2:
The patent adds a spatial dimension to timing control by introducing panel-specific associations with TRPs. Instead of single-dimension timing control, the system now operates in multiple dimensions (TRP dimension, panel dimension, timing advance dimension), enabling sophisticated UCI multiplexing rules that consider spatial relationships between TRPs and panels.
2Reliability
If beam sweeping is applied for uplink transmission repetition to exploit spatial diversity, then the transmission time increases
Solution Approach 1:
The patent implements periodic beam sweeping patterns where beams are systematically swept across different spatial directions in repeating cycles. This periodic approach ensures that uplink transmissions are repeated across multiple beams over time, exploiting spatial diversity while maintaining predictable timing patterns that minimize latency through optimized sweep sequences.
Data Source
AI summary
Various embodiments herein provide techniques for uplink control information (UCI) multiplexing in multi—transmission-reception point (TRP) multi-panel operation. For example, the UCI may be multiplexed on a physical uplink shared channel (PUSCH) and/or a physical uplink control channel (PUCCH). Embodiments further include techniques for handling collision between PUSCH and PUCCH with different priorities. Additionally, embodiments include techniques for timing control for multi-TRP multi-panel operation. Other embodiments may be described and claimed.