Same Power Transmission Slots for DM-RS Phase Continuity
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Solution Overview
Problem
Current wireless communication systems face challenges in maintaining consistent power and phase for demodulation reference signal (DM-RS) filtering across multiple slots in time division duplexing (TDD) and frequency division duplexing (FDD) modes, which affects the reliability of data/control information reception.
Innovation Solution
The proposed solution involves configuring user equipment (UE) and base stations to determine specific numbers of consecutive slots for consistent power transmission/reception of channels, with adjustments in power levels based on changes indicated by specific information signals, ensuring power consistency and phase continuity across time domain windows (TDWs) for DM-RS bundling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If power levels are adjusted dynamically across slots, then transmission adaptability is improved, but power consistency for DM-RS filtering deteriorates
Solution Approach 1:
The transmission timeline is segmented into time domain windows (TDWs) where each TDW maintains independent power consistency. Within each TDW, same power is maintained across slots for DM-RS filtering, while power can change between TDWs. This segmentation allows dynamic adaptation at TDW boundaries while preserving consistency within TDWs.
Solution Approach 2:
The system pre-configures the number of slots N and the structure of time domain windows before transmission begins. This preliminary configuration enables the transmitter and receiver to synchronize on power consistency intervals in advance, allowing dynamic power adjustments to be made at predetermined TDW boundaries rather than mid-window.
2Measurement precision
If power is maintained consistently across multiple slots, then DM-RS filtering accuracy is improved, but transmission flexibility deteriorates
Solution Approach 1:
The system implements dynamic power adjustment at the TDW level while maintaining static power consistency within each TDW. The number of slots N and TDW structure can be dynamically configured based on channel conditions, allowing the system to adapt transmission parameters while preserving the power consistency needed for accurate DM-RS filtering within each window.
Solution Approach 2:
The system changes power parameters at discrete TDW boundaries rather than continuously. By controlling the number of slots N and TDW configuration, the system can adjust transmission power in steps while maintaining consistency within each window, thus achieving both measurement precision and transmission flexibility.
3Stability of the object's composition
If the number of consecutive slots for same power is increased, then phase continuity is improved, but system response time deteriorates
Solution Approach 1:
The transmission is segmented into TDWs of N consecutive slots where phase continuity is maintained. By adjusting the size of N, the system can balance phase continuity (larger N) against response time (smaller N), allowing flexible configuration based on channel conditions and service requirements.
Solution Approach 2:
The system employs periodic power consistency intervals defined by the TDW structure with N slots. This periodic repetition of same-power intervals provides regular phase continuity opportunities while allowing power changes at each period boundary, thus balancing stability and responsiveness.
Data Source
AI summary
Methods and apparatuses for same power transmissions. The method includes receiving first information indicating use of a same power for transmission of a channel over more than one slot and second information indicating use of a same power, after a change in power, for transmission of the channel over more than one slot. The method further includes determining a first number of consecutive slots, a second number of consecutive slots, from the first number of consecutive slots, for transmission of the channel with a same power, and a third number of consecutive slots, from the first number of consecutive slots and after the second number of consecutive slots, for transmission of the channel with a same power. The method further includes transmitting the channel with a first power in slots from the second number of consecutive slots and a second power in slots from the third number of consecutive slots.