Multi-Carrier Sidelink PSFCH Carrier Selection for NR-V2X
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Solution Overview
Problem
The challenge in New Radio (NR)-Vehicle to Everything (V2X) communication is selecting a carrier for Physical Sidelink Feedback Channel (PSFCH) transmission when multi-carrier sidelink transmission is supported, as existing methods do not address how to optimize this process for improved throughput and reliability.
Innovation Solution
The method involves the first terminal selecting a carrier for PSFCH transmission based on first indication information, carrier configuration information of PSFCH, and Channel Busy Ratio (CBR) to optimize carrier selection for PSFCH in multi-carrier sidelink transmission scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If single-carrier transmission mode is used for sidelink data, then the PSFCH transmission is simple and reliable, but the throughput of the sidelink transmission system is limited
Solution Approach 1:
The patent applies parameter changes by transitioning from single-carrier to multi-carrier transmission modes. The system dynamically adjusts the carrier configuration based on transmission requirements, allowing the terminal to select from multiple carriers (e.g., first carrier and second carrier) to transmit PSFCH, thereby increasing throughput while managing complexity through structured selection criteria.
2Productivity
If multi-carrier transmission is supported for sidelink data, then the throughput is improved, but the carrier selection for PSFCH transmission becomes unclear and complex
Solution Approach 1:
The patent implements feedback mechanisms where the terminal receives indication information from the network or measures channel conditions (such as CBR - Channel Busy Ratio) to determine the optimal carrier for PSFCH transmission. This feedback loop simplifies the carrier selection process by providing clear guidance on which carrier to use based on current system conditions.
Solution Approach 2:
The patent applies preliminary action by pre-configuring carrier information and establishing selection criteria before actual transmission occurs. The terminal is provided with carrier configuration information and indication signals in advance, enabling it to automatically select the appropriate carrier without complex real-time decision-making, thus improving ease of operation.
3Reliability
If the same carrier is used for both sidelink data and PSFCH transmission, then the system is simple to implement, but the reliability of feedback transmission is reduced in multi-carrier scenarios
Solution Approach 1:
The patent applies segmentation by separating the carrier selection for sidelink data transmission from the carrier selection for PSFCH transmission. The system allows different carriers to be used for different purposes - data carriers for carrying sidelink data and feedback carriers for carrying PSFCH - thereby improving feedback transmission reliability while managing complexity through structured carrier allocation.
Data Source
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AI summary
Provided in the embodiments of the present application are a wireless communication method and a device. The method comprises : a first terminal receiving sidelink data, which is sent by a second terminal on a plurality of carriers; and according to at least one of the following : the plurality of carriers, first indication information, carrier configuration information of a PSFCH, and a CBR, the first terminal selecting at least one carrier for transmitting the PSFCH. Therefore, when sidelink transmission supports multi-carrier transmission, a carrier for transmitting a PSFCH can be selected.