PSFCH Resource Allocation in Unlicensed Sidelink Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In sidelink communication systems using unlicensed spectrum, there is a lack of clear methods for determining resources for the sidelink feedback channel, which affects the reliability and efficiency of communication.
Innovation Solution
A method for sidelink transmission that involves determining transmission resources for a Physical Sidelink Feedback Channel (PSFCH) using common interlaces and dedicated Resource Blocks (RBs), with a terminal device configuring these resources based on pre-configuration or network signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sidelink feedback channel resources are determined in unlicensed spectrum, then communication reliability is improved, but resource allocation complexity increases due to lack of clear determination methods
Solution Approach 1:
The feedback channel resources are segmented into common interlace resources and dedicated RB resources. The terminal device determines common interlace occupied by the PSFCH and dedicated RB occupied by the PSFCH separately, allowing independent optimization and management of each resource type, thereby reducing overall allocation complexity while maintaining reliability
Solution Approach 2:
The terminal device pre-determines the transmission resources for the PSFCH including common interlace and dedicated RB before actual feedback transmission. This preliminary resource determination establishes a clear framework in advance, eliminating the need for complex real-time resource allocation decisions and improving communication reliability
2Productivity
If common interlace and dedicated RB are used for PSFCH transmission, then resource allocation efficiency is improved, but device configuration complexity increases
Solution Approach 1:
The common interlace structure serves multiple purposes: it provides a shared resource pool for multiple terminal devices, enables efficient resource allocation through standardized formatting, and supports both dedicated and non-dedicated RB assignments. This multi-functionality improves resource allocation efficiency while the standardized common interlace format actually reduces configuration complexity
Solution Approach 2:
The resource allocation is organized into a two-dimensional structure with common interlace providing the primary dimension and dedicated RB providing the secondary dimension. This hierarchical organization allows efficient resource management where the common interlace framework handles bulk allocation and dedicated RB handles fine-grained assignment, improving overall efficiency without proportionally increasing complexity
Data Source
AI summary
Provided are a method for sidelink transmission and a terminal device. A first terminal device determines transmission resources of a first PSFCH, the transmission resource of the first PSFCH includes one or more of the following: a common interlace occupied by the first PSFCH; and a dedicated RB occupied by the first PSFCH.