PUCCH Feedback Timing for PSSCH Sidelink Communications
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting feedback information at optimal timing, particularly in scenarios requiring ultra-reliable and low-latency communications, such as vehicle-to-everything (V2X) applications, which are crucial for ensuring safety and reliability in self-driving vehicles and other critical systems.
Innovation Solution
The method involves determining feedback information transmission timing to ensure rapid and synchronized communication between user equipments (UEs) using sidelink synchronization signals, such as the primary and secondary sidelink synchronization signals (S-PSS and S-SSS), and optimizing power settings to enhance signal coverage and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If feedback information is transmitted using conventional timing methods, then system compatibility is maintained, but transmission latency increases and reliability decreases for V2X applications
Solution Approach 1:
The patent implements dynamic feedback transmission timing where the timing is adapted based on the specific V2X application requirements. The system dynamically selects between different feedback timing options (e.g., immediate feedback, delayed feedback, or asynchronous feedback) depending on the service type, channel conditions, and latency requirements, thereby resolving the contradiction between maintaining system compatibility and achieving low-latency reliable communication.
Solution Approach 2:
The patent changes the timing parameters of feedback transmission by introducing configurable time offsets, feedback windows, and scheduling intervals that can be adjusted according to V2X service requirements. This allows the system to optimize feedback timing for different scenarios (e.g., platooning, collision avoidance, remote driving) while maintaining backward compatibility with conventional systems through parameter configuration.
2Area of stationary object
If power settings are optimized for maximum coverage, then signal reach is improved, but energy consumption increases
Solution Approach 1:
The patent implements dynamic power control where transmission power is adjusted in real-time based on channel conditions, distance to target vehicles, service requirements, and battery status. The system uses power adaptation algorithms that increase power only when necessary for maintaining V2X communication reliability, rather than operating at maximum power continuously, thus resolving the contradiction between coverage area and energy consumption.
Solution Approach 2:
The patent applies different power settings to different transmission scenarios and geographic locations. For example, higher power is used only in areas with poor channel conditions or for critical safety messages, while lower power is used in areas with good signal quality or for non-critical information exchange. This localized power optimization resolves the contradiction by providing adequate coverage only where necessary.
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
A method of performing an operation for a first user equipment (UE) in a wireless communication system includes transmitting a physical sidelink shared channel (PSSCH) to a second UE by the first UE, and transmitting, to a base station (BS), feedback information based on a physical sidelink feedback channel (PSFCH) for the PSSCH on a physical uplink control channel (PUCCH) by the first UE. A transmission timing of the PUCCH is determined based on information about the number of slots from the PSFCH to the PUCCH.