V2X Resource Element Allocation for Accurate Data Block Sizing
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Solution Overview
Problem
Current communication standards for vehicle-to-everything (V2X) scenarios are inadequate for determining the quantity of resource elements (REs) needed for data transmission due to differences in frame structures, leading to inefficiencies in data transmission methods.
Innovation Solution
A method for determining the quantity of REs used for data transmission in V2X scenarios by considering various types of information, such as control channels, demodulation pilots, and reference signals, to calculate transport block sizes accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current standard methods for determining RE quantity are used, then the process is simple and follows existing standards, but the method is not applicable to V2X scenarios with different frame structures
Solution Approach 1:
The patent modifies the RE determination parameters specifically for V2X scenarios by introducing V2X-specific parameters (N_RB, L_PSCCH, N_DMRS, etc.) that account for the different frame structure. The determination formula is adapted to V2X characteristics while maintaining the systematic approach of parameter-based calculation.
Solution Approach 2:
The determination process is segmented into distinct components: total RE calculation, control channel RE subtraction, pilot RE subtraction, and data RE determination. Each component is calculated separately using specific V2X-appropriate parameters, making the complex determination process more manageable and adaptable.
2Measurement precision
If all types of information (control channels, pilots, reference signals) are considered in RE determination, then the accuracy of data transmission is improved, but the calculation complexity increases
Solution Approach 1:
The patent segments the RE determination into distinct subtraction steps: first calculating total REs, then subtracting control channel REs (N_PSCCH), followed by subtracting pilot REs (N_DMRS), and finally determining data REs. This segmentation improves accuracy by systematically accounting for each information type while organizing the calculation process.
Solution Approach 2:
The patent performs preliminary calculations for control channel REs and pilot REs before determining the final data RE quantity. By pre-calculating these subtractive components using V2X-specific parameters, the method ensures accurate data RE determination without requiring complex simultaneous calculations.
3Adaptability or versatility
If V2X-specific frame structure is used, then the communication is optimized for V2X scenarios, but the standard air interface determination methods become inapplicable
Solution Approach 1:
The patent introduces V2X-specific parameters that reflect the different frame structure: N_RB (number of resource blocks), L_PSCCH (control channel length), N_DMRS (pilot quantity), and other V2X-characteristic parameters. These parameter changes enable the determination method to work with V2X frame structures while maintaining systematic calculation.
Solution Approach 2:
The patent creates a flexible determination approach that dynamically adapts to V2X frame structure characteristics. The method uses V2X-specific parameters that can vary according to different V2X transmission scenarios, making the determination process adaptable rather than fixed, thus maintaining ease of operation across different V2X configurations.
Data Source
AI summary
This application provides a communication method and a communication apparatus, to determine a quantity of REs used to transmit data in a V2X scenario. Specifically, a transmit-side terminal device or a receive-side terminal device may determine, based on a quantity of REs that are in a first time-frequency resource and that are used to transmit first information, a quantity of REs that are in the first time-frequency resource and that are used to transmit data. The first time-frequency resource includes a first time unit in time domain and includes a data channel resource in frequency domain. The first information includes at least one of the following: a control channel, a control channel demodulation pilot, a data channel demodulation pilot, second-stage control information, a PTRS, or a CSI-RS.