Sidelink DMRS Pattern Across Multi-Slot Time Units
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Solution Overview
Problem
The increase in frequency for sidelink communication systems poses challenges in determining suitable schemes for performing communication, as the subcarrier spacing increases, leading to reduced symbol duration, which affects transmission efficiency.
Innovation Solution
A method for sidelink transmission that involves determining a DMRS pattern for a channel transmitted in a time unit comprising M consecutive slots, where M is a positive integer greater than 1, and implementing this in a terminal device with a transceiver, processor, and memory to enable effective signal reception and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the frequency band is extended to high frequencies (higher than 52.6 GHz) to improve transmission rate, then the transmission rate is improved, but the subcarrier spacing increases leading to reduced symbol duration which affects transmission efficiency
Solution Approach 1:
The patent segments the time unit into multiple consecutive slots (M slots where M>1) to accommodate the reduced symbol duration at high frequencies. This segmentation allows the system to maintain proper timing structure by dividing the time unit into smaller manageable units, each containing appropriate number of symbols despite the shorter symbol duration caused by increased subcarrier spacing.
Solution Approach 2:
The patent dynamically adjusts the DMRS pattern configuration based on the high-frequency characteristics. The DMRS pattern is adapted to the reduced symbol duration and increased subcarrier spacing, allowing the system to optimize reference signal placement and density according to the specific frequency band and subcarrier spacing being used, thereby maintaining transmission efficiency.
2Adaptability or versatility
If the subcarrier spacing is increased to support high frequency operation, then the frequency band utilization is improved, but the symbol duration decreases making it difficult to maintain transmission efficiency
Solution Approach 1:
The patent changes the DMRS pattern parameters specifically for high-frequency operation with increased subcarrier spacing. The pattern configuration, including DMRS symbol positions, density, and structure, is adjusted as a function of the subcarrier spacing and frequency band, enabling the system to maintain transmission efficiency despite the parameter changes required for high-frequency operation.
Data Source
AI summary
A method for sidelink transmission, which includes: determining, by a first terminal device, a demodulation reference signal (DMRS) pattern for a first channel transmitted in a first time unit; where the first time unit includes M consecutive slots, and M is a positive integer greater than 1. In the above technical solution, sidelink transmitting or sidelink receiving is performed on the basis of a time unit, and one time unit includes a plurality of time slots, such that the transmission efficiency of sidelink data can be improved. Furthermore, a DMRS pattern based on a time unit is provided in the embodiments of the present disclosure, which is conducive to improving the demodulation performance of data.