Terminal FFP Time Domain Position Determination
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Solution Overview
Problem
Existing communication systems face challenges in determining the time domain positions of a Fixed Frame Period (FFP) within unlicensed frequency spectra, which is crucial for efficient channel listening and resource allocation.
Innovation Solution
A method and apparatus for determining time domain positions of an FFP by obtaining first and second indication information, where the first indication information specifies the starting position of the FFP and the second indication information specifies the time domain length of the FFP, allowing the terminal to calculate the precise time domain positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal determines time domain positions of FFP in unlicensed spectrum, then channel listening efficiency is improved, but the complexity of determining precise time positions increases
Solution Approach 1:
The FFP time domain structure is segmented into multiple slots, with indication information provided for specific slots (e.g., first slot and last slot). The terminal determines time domain positions by calculating based on these segmented slot indications, rather than determining all slots uniformly, thus reducing determination complexity while maintaining listening efficiency.
Solution Approach 2:
The network device performs preliminary action by providing indication information (first indication information and second indication information) about FFP time domain positions before the terminal needs to perform channel listening. This allows the terminal to pre-calculate and store time domain positions, improving channel listening efficiency without increasing real-time determination complexity.
2Measurement precision
If indication information is provided for all slots in FFP, then measurement precision of time domain positions is improved, but loss of information increases due to excessive signaling
Solution Approach 1:
The patent extracts only the essential indication information needed for time domain position determination - specifically, indication information for the first slot and last slot of FFP, along with FFP period and duration. This selective extraction provides sufficient precision for terminal calculation while minimizing signaling overhead compared to providing information for all slots.
Solution Approach 2:
The terminal creates a copy or representation of the FFP time domain structure by calculating time domain positions for all slots based on the provided indication information for key slots. This allows the terminal to have precise time domain position data for all slots without requiring the network to transmit information for each slot, thus reducing signaling overhead.
3Measurement precision
If the terminal calculates time domain positions using starting position and time domain length, then determination accuracy is improved, but processing time increases
Solution Approach 1:
The network device provides indication information (starting position and time domain length) in advance, allowing the terminal to perform calculations at convenient times rather than under time pressure during channel listening. This preliminary provision of parameters enables accurate calculation without causing time loss during critical operations.
Solution Approach 2:
The patent uses parameter changes by providing FFP period and duration as configurable parameters. The terminal can adjust calculation strategies based on these parameters - for example, using longer periods for more accurate calculations when time is not constrained, or using shorter periods for faster determination when time is critical, thus balancing accuracy and processing time.
Data Source
AI summary
A time domain position determination method includes: obtaining, by a terminal, first indication information and second indication information, the first indication information indicating a starting position of a Fixed Frame Period (FFP), the second indication information indicating a time domain length of the FFP; and determining time domain positions of the FFP based on the starting position of the FFP and the time domain length of the FFP. Embodiments of the present disclosure further disclose a time domain position determination apparatus, a terminal, a computer-readable medium, a chip, and a computer program product.