2nd Stage SCI Resource Element Calculation in Wireless Communication
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Solution Overview
Problem
The challenge in determining the number of resource elements (REs) for 2nd stage SCI transmission in a 2-stage SCI structure, particularly when handling PSCCH, PSSCH DMRS, SL PT-RS, and SL CSI-RS overhead, is not effectively addressed in existing wireless communication systems.
Innovation Solution
The method involves calculating the number of REs for 2nd stage SCI by excluding only the overhead of PSCCH, allowing for the minimum overhead removal and enabling efficient transmission of 2nd stage SCI, while considering the transmission of PT-RS and CSI-RS on PSSCH.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of REs for 2nd stage SCI is calculated by excluding overhead of PSCCH, PSSCH DMRS, SL PT-RS, and SL CSI-RS, then the overhead removal is comprehensive, but the calculation complexity increases and may remove more overhead than necessary
Solution Approach 1:
The patent extracts only the essential overhead component (PSCCH) from the total overhead for RE calculation purposes. By removing only the PSCCH overhead and excluding other components (PSSCH DMRS, SL PT-RS, SL CSI-RS) from the calculation, the method simplifies the RE determination process while maintaining accuracy for the critical control channel overhead.
2Quantity of substance
If more overhead is removed from PSSCH REs, then more REs are available for 2nd stage SCI transmission, but the overhead of other signals (PT-RS, CSI-RS) may be incorrectly reduced affecting their transmission quality
Solution Approach 1:
The patent segments the overhead components and treats them differently in the RE calculation. Specifically, it separates PSCCH overhead (which is excluded from 2nd stage SCI RE calculation) from other overhead components like PSSCH DMRS, SL PT-RS, and SL CSI-RS (which are maintained separately). This segmentation ensures that 2nd stage SCI gets adequate REs while protecting the transmission quality of reference signals.
3Productivity
If comprehensive overhead removal is performed, then resource utilization is optimized, but the risk of incorrectly calculating REs for other channels increases
Solution Approach 1:
The patent applies local quality by treating different overhead components with different calculation rules. PSCCH overhead is locally excluded from the 2nd stage SCI RE calculation, while other overhead components maintain their standard treatment. This localized approach optimizes resource allocation for control information without compromising the overall RE calculation accuracy for other channels.
Data Source
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AI summary
An embodiment provides an operation method of a user equipment (UE) in a wireless communication system, the method comprising the steps of: transmitting 1st stage SCI (a sidelink control channel) on a physical sidelink control channel (PSCCH); and transmitting 2nd stage SCI on a physical sidelink shared channel (PSSCH), wherein the number of symbols for transmission of the 2nd stage SCI is determined using the number of resource elements (REs) related to the 2nd stage SCI, and the number of the resource elements (REs) related to the 2nd stage SCI is obtained by subtracting only the number of REs related to the PSCCH from the number of REs related to the PSSCH.