Sidelink Resource Mapping Near PSSCH DMRS for Second SCI
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Solution Overview
Problem
Existing V2X communication systems face challenges in configuring transmission resources for second-order physical sidelink control channels (PSCCH), leading to increased detection complexity and latency due to the lack of clear methods for determining these resources.
Innovation Solution
A method and apparatus for determining sidelink transmission resources, including a third transmission resource for PSSCH and a second transmission resource adjacent to the DMRS of PSSCH, specifically designed for transmitting second SCI, with configurations based on information from first SCI to optimize resource allocation and reduce detection complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blind detection is used to receive the first PSCCH, then the receiver can obtain control information, but the detection complexity increases
Solution Approach 1:
The transmitter performs preliminary action by explicitly indicating the transmission resource for the second PSCCH in the first PSCCH, so that the receiver does not need to perform blind detection for resource determination. This preliminary indication reduces the detection complexity at the receiver side while maintaining reliable control information reception.
2Device complexity
If no clear method is provided for determining second PSCCH transmission resource, then the system structure remains simple, but transmission latency increases
Solution Approach 1:
The transmitter performs preliminary action by indicating the transmission resource for the second PSCCH in advance within the first PSCCH. This allows the receiver to directly obtain the resource information without performing time-consuming blind detection, thereby reducing transmission latency while maintaining relatively simple system structure.
3Device complexity
If the second PSCCH transmission resource is not optimized, then the resource allocation remains simple, but detection complexity and latency increase
Solution Approach 1:
The patent applies local quality by optimizing the resource allocation for the second PSCCH specifically, placing it in the time-domain resource that is the same as or adjacent to the DMRS time-domain resource. This localized optimization reduces detection complexity for the second PSCCH without requiring complex overall resource allocation mechanisms.
Data Source
AI summary
A method for determining a sidelink transmission resource, a terminal device, and a network device are provided. The method includes determining a third transmission resource that includes a transmission resource for transmitting a physical sidelink shared channel (PSSCH), and determining a second transmission resource in the third transmission resource. The second transmission resource includes a time-domain resource the same as and/or adjacent to a time-domain resource for a demodulation reference signal (DMRS) of the PSSCH. The second transmission resource is used for transmitting second sidelink control information (SCI). The third transmission resource further includes a first transmission resource for transmitting first SCI.