V2X Feedback Sequence Transmission Power Control
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Solution Overview
Problem
In Vehicle to Everything (V2X) communication systems, the lack of a power control mechanism leads to issues where feedback sequences received with lower reception power are overwhelmed by those received with higher reception power, making it impossible to interpret the feedback sequences accurately.
Innovation Solution
A method for transmitting a feedback sequence is introduced, where a feedback terminal receives data on a data channel corresponding to reception and transmission powers, determines the number of sending times based on these powers, and sends the feedback sequence accordingly to improve reception accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If feedback sequences are transmitted without power control mechanism, then transmission simplicity is maintained, but feedback accuracy deteriorates due to weaker sequences being overwhelmed by stronger ones
Solution Approach 1:
The system performs preliminary power measurement and path loss calculation before feedback transmission. The feedback terminal measures reception power of downlink data and calculates path loss to determine appropriate feedback transmission power in advance, preventing weak signals from being overwhelmed before transmission occurs.
Solution Approach 2:
The invention changes the transmission power parameter of feedback sequences based on measured reception power and calculated path loss. By dynamically adjusting feedback power levels according to channel conditions, the system ensures that feedback sequences with lower reception power can still be accurately interpreted after transmission.
2Reliability
If feedback terminal transmits feedback sequence only once, then transmission time is reduced, but reception reliability deteriorates due to potential signal interference
Solution Approach 1:
The feedback terminal transmits the feedback sequence multiple times in periodic intervals rather than continuously. This periodic transmission allows the receiving terminal to accumulate and filter multiple feedback sequences over time, improving reception reliability through temporal diversity while limiting total transmission time through controlled repetition count.
Solution Approach 2:
The system implements a feedback mechanism where the receiving terminal filters feedback sequences based on correlation with expected patterns and transmits power adjustment information back to the feedback terminal. This iterative feedback process enables dynamic optimization of transmission parameters to achieve reliable feedback delivery.
Data Source
AI summary
A method for transmitting a feedback sequence includes receiving, by a feedback terminal, data on a data channel. The data corresponds to a reception power and a transmission power. The feedback terminal determines the number of sending times to send a feedback sequence based on the reception power and the transmission power. The feedback terminal sends the feedback sequence based on the number of sending times.