Multi-Panel Uplink Transmission Beam Alignment
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently multiplexing physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) signals with multiple transmit and receive points (TRP) and multi-panel operation, particularly in aligning beams between user equipment (UE) and gNB for effective communication.
Innovation Solution
The proposed solution involves defining mechanisms for multiplexing PUCCH(s) and PUSCH(s) with multi-TRP and multi-panel operation, including beam/panel indication for PUCCH, and specific rules for multiplexing PUCCH(s) and PUSCH(s) to ensure alignment between gNB and UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple PUCCH and PUSCH signals are multiplexed with multi-TRP and multi-panel operation, then communication coverage and reliability are improved, but beam alignment complexity between gNB and UE increases
Solution Approach 1:
The patent segments the beam alignment process by introducing separate indication mechanisms for different panels. Each panel can be independently indicated using panel-specific downlink reference signal (DL RS) resources, allowing the gNB to control beam alignment for each panel separately rather than managing all panels as a single complex unit.
Solution Approach 2:
The patent implements preliminary beam alignment configuration through RRC signaling that pre-configures panel indications and DL RS resource associations. This preliminary setup enables the UE to prepare beam alignment parameters in advance, reducing the real-time complexity of beam management during actual multi-panel operation.
2Productivity
If beam/panel indication mechanisms are implemented for PUCCH, then uplink transmission efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent creates a universal panel indication mechanism that serves multiple functions: it identifies which panel transmits PUCCH, associates the transmission with specific DL RS resources for beam alignment, and enables multi-TRP operation. This single mechanism handles multiple tasks that would otherwise require separate signaling procedures.
Solution Approach 2:
The patent introduces downlink reference signal (DL RS) resources as an intermediary that indirectly indicates panel information. Instead of directly signaling panel identifiers, the gNB configures DL RS resources that the UE uses to determine which panel to activate, reducing explicit signaling overhead while maintaining precise panel control.
3Reliability
If PUCCH and PUSCH multiplexing rules are defined for multi-TRP operation, then communication quality is improved, but system complexity increases
Solution Approach 1:
The patent applies local quality by allowing different multiplexing configurations for different panels and TRPs. Each panel can have its own PUCCH-PUSCH multiplexing rules based on local channel conditions and TRP requirements, rather than enforcing a single uniform multiplexing scheme across all panels, thus improving communication quality while managing complexity through localized optimization.
Data Source
AI summary
Methods, systems, and storage media are described for uplink transmission for multi-panel operation. Other embodiments may be described and/or claimed.