NR V2X PSCCH Pilot Configuration for Channel Estimation
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Solution Overview
Problem
Current C-V2X transmission methods, particularly in NR V2X, face inefficiencies due to excessive blind detection and complexity in user equipment perception, especially in 2-stage PSCCH transmissions where both parts tend to have the same number of bits, leading to lower performance compared to 1-stage transmission.
Innovation Solution
Configuring no pilot on a physical resource in a first time-frequency unit and determining the transmission capability to perform rate matching, thereby enhancing transmission resources and improving performance, specifically by mapping the second part of PSCCH without pilots and agreeing on configuration information through protocols to facilitate channel estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pilot is configured on physical resource for channel estimation, then channel estimation accuracy is improved, but transmission resource overhead increases
Solution Approach 1:
The patent applies local quality by differentiating pilot configuration across different parts of PSCCH. Specifically, the first part of PSCCH is configured with pilots for accurate channel estimation, while the second part of PSCCH is configured without pilots to save transmission resources. This localized differentiation allows the system to achieve adequate channel estimation accuracy where needed while reducing overall resource overhead.
2Adaptability or versatility
If 2-stage PSCCH transmission is used, then transmission flexibility is improved, but user equipment perception complexity increases
Solution Approach 1:
The patent segments PSCCH into two distinct parts with different configurations. The first part of PSCCH carries critical control information with pilot signals for reliable reception, while the second part carries additional information without pilots. This segmentation allows the system to maintain transmission flexibility through 2-stage structure while managing UE complexity by clearly defining different processing requirements for each part.
Solution Approach 2:
The patent applies partial action by providing pilots only for the first part of PSCCH rather than for the entire PSCCH. This partial pilot configuration is sufficient for decoding the critical first part while avoiding the excessive resource consumption that would result from piloting the entire transmission, thereby reducing UE perception complexity.
3Shape
If both parts of PSCCH have the same number of bits, then transmission symmetry is improved, but transmission performance deteriorates
Solution Approach 1:
The patent deliberately introduces asymmetry between the two parts of PSCCH. The first part is designed with a specific bit length optimized for critical control information and includes pilots, while the second part has a different bit length and no pilots. This asymmetric design allows each part to be optimized for its specific function, improving overall transmission performance despite breaking the symmetry.
Data Source
AI summary
The present disclosure relates to a method and device for information configuration, a method and device for channel estimation method, a transmitting device and a receiving device. The method for information configuration includes: configuring no pilot on a physical resource transmitted on a first time-frequency unit; determining a transmission capability of the physical resource configured without a pilot, and performing rate matching based on the transmission capability.