Uplink Transmission FDM Mode Switching for Multi-TRP Reliability
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Solution Overview
Problem
Existing communication technologies lack efficient dynamic switching mechanisms for uplink transmission modes in multi-Transmission/Reception Point (m-TRP) schemes, particularly for frequency division multiplexing (FDM), which are essential for optimizing performance under varying channel conditions.
Innovation Solution
A terminal device measures at least two reference signals from a network device and transmits a mode indication for preferred FDM transmission modes, enabling dynamic switching between FDM modes based on performance indicators like uplink SNR, allowing the network device to adapt transmission strategies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple FDM transmission modes are supported for m-TRP, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic switching between different FDM transmission modes (FDM mode A and FDM mode B) based on real-time channel conditions. The terminal device determines the preferred FDM mode by measuring reference signals and evaluating uplink transmission performance, then dynamically selects the optimal mode to maintain high reliability without requiring the device to continuously support all complex modes simultaneously.
Solution Approach 2:
The patent changes transmission parameters by switching between different FDM mode configurations (different TCI state associations, different frequency resource allocations). By adjusting these parameters based on measured channel quality, the system achieves improved reliability while managing device complexity through parameter optimization rather than structural complexity.
2Productivity
If dynamic FDM mode switching is implemented, then transmission efficiency is improved, but measurement and detection difficulty increases
Solution Approach 1:
The patent performs preliminary measurements of reference signals (CSI-RS or SSB) from multiple TRPs before determining the optimal FDM mode. By pre-measuring channel quality indicators and evaluating different FDM mode configurations in advance, the terminal device can make informed mode selection decisions that improve transmission efficiency while managing measurement complexity through structured evaluation procedures.
Solution Approach 2:
The patent implements a feedback mechanism where the terminal device measures reference signals, evaluates uplink transmission performance for different FDM modes, and selects the preferred mode based on measured metrics. This feedback loop enables efficient dynamic adaptation while managing measurement complexity through systematic evaluation of channel conditions against predefined criteria.
3Adaptability or versatility
If FDM mode indication is transmitted based on reference signal measurements, then adaptability is improved, but information loss increases
Solution Approach 1:
The patent extracts essential channel information from reference signal measurements (such as RSRP, SINR, or other channel quality indicators) to determine the preferred FDM mode. By extracting only the most critical measurement data needed for mode selection rather than transmitting all raw measurement information, the system achieves high adaptability while minimizing information loss and signaling overhead.
Data Source
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AI summary
Embodiments of the present disclosure disclose devices, methods and apparatuses for uplink transmission. A terminal device measures at least two reference signals from a network device. Moreover, the terminal device transmits, to the network device, a mode indication of uplink transmission for multiple transmission and reception points (m-TRP) based on the measured at least two reference signals. The mode indication indicates information on a preferred one of frequency division multiplexing (FDM) transmission modes. The FDM transmission modes comprise at least a first FDM transmission mode and a second FDM transmission mode.