Sidelink CSI Transmission via MAC CE Format
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting sidelink channel state information (CSI) between user equipment (UEs) in vehicle-to-everything (V2X) communication, particularly in supporting enhanced mobile broadband, massive Machine Type Communication, Ultra-Reliable and Low Latency Communication, and other advanced V2X scenarios.
Innovation Solution
A method and apparatus for transmitting sidelink (SL) CSI between UEs in a MAC control element (CE) format, utilizing a processor to generate and transmit SL CSI, and a non-transitory computer-readable storage medium with instructions to execute this process, enabling efficient SL CSI reporting in V2X communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sidelink CSI is transmitted using existing methods, then basic communication functionality is maintained, but CSI reporting efficiency is insufficient for advanced V2X scenarios
Solution Approach 1:
The patent segments the CSI reporting process into multiple components: MAC CE format for compact CSI transmission, separate resource allocation for CSI-RS and CSI reporting, and structured reporting content including CRI, L1-RSRP, and CQI. This segmentation enables efficient CSI reporting while maintaining transmission reliability through organized resource management.
Solution Approach 2:
The patent changes the format parameters of CSI transmission by introducing MAC CE format with specific field structures (CRI field, L1-RSRP field, CQI field). It also changes resource allocation parameters by dedicating specific physical resources for CSI-RS and CSI reporting, optimizing the balance between reporting efficiency and transmission reliability.
2Adaptability or versatility
If resource allocation is optimized for advanced V2X scenarios, then support for vehicle platooning and remote driving is improved, but system complexity increases
Solution Approach 1:
The patent creates a universal MAC CE format that can be applied across multiple V2X scenarios including vehicle platooning, advanced driving, and remote driving. The standardized format with configurable fields (CRI, L1-RSRP, CQI) provides multi-functionality, enabling the same mechanism to serve different V2X applications without proportionally increasing system complexity.
Solution Approach 2:
The patent performs preliminary resource allocation by pre-configuring dedicated resources for CSI-RS and CSI reporting before actual V2X communication occurs. This preliminary setup includes defining resource pools, allocation patterns, and reporting formats in advance, which simplifies real-time operations and reduces runtime complexity while maintaining high adaptability for various V2X scenarios.
Data Source
AI summary
According to an embodiment of the present disclosure, there may be provided a method of transmitting SL CSI by a first apparatus. The method may include generating the SL CSI related to a channel state between the first apparatus and a second apparatus in a MAC CE format, and transmitting the SL CSI to the second apparatus.