Sidelink Resource Allocation Mode Switching for Physical Layer Recovery
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, sidelink user equipment (UE) faces challenges in communicating with base stations, leading to issues with resource allocation and latency, which affects the reliability and efficiency of V2X communication scenarios such as vehicle platooning, advanced driving, and remote driving.
Innovation Solution
A method where a first UE determines if a physical layer problem with the base station occurs, starts a recovery timer, and transmits sidelink data using a sidelink resource, deciding whether to switch from resource allocation mode 1 to mode 2 based on the latency budget and recovery timer expiration time, thereby managing resource allocation and maintaining communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE switches to resource allocation mode 2 when a physical layer problem occurs, then the sidelink communication reliability is improved, but the operational complexity of the UE increases
Solution Approach 1:
The patent implements dynamic switching between resource allocation mode 1 and mode 2 based on the occurrence of physical layer problems. The UE monitors the communication status and automatically transitions between allocation modes to maintain reliability while adapting to changing conditions, thus resolving the contradiction between reliability improvement and operational complexity.
Solution Approach 2:
The patent changes the resource allocation mode parameter from static to dynamic based on physical layer problem detection. By introducing a recovery timer and comparing it with latency budget, the system optimizes the allocation mode selection, improving reliability without permanently increasing operational complexity.
2Productivity
If the UE monitors physical layer problems and manages resource allocation modes, then the communication efficiency is improved, but the processing overhead increases
Solution Approach 1:
The patent implements preliminary monitoring of physical layer problems and pre-configures recovery timers before actual communication failures occur. This allows the UE to be prepared for potential issues and switch allocation modes proactively, improving communication efficiency while managing processing overhead through structured monitoring.
Solution Approach 2:
The patent establishes a feedback mechanism where the UE continuously monitors physical layer communication status and uses this information to dynamically adjust resource allocation modes. The recovery timer provides a feedback threshold that triggers mode switching, optimizing communication efficiency with controlled processing overhead.
3Productivity
If the UE uses recovery timer and latency budget comparison for mode switching, then the resource allocation optimization is improved, but the decision-making complexity increases
Solution Approach 1:
The patent introduces dynamic decision-making based on the comparison between recovery timer expiration time and latency budget. This dynamic threshold comparison optimizes resource allocation by switching modes only when necessary, improving productivity while keeping decision-making complexity manageable through a clear comparison logic.
Solution Approach 2:
The patent optimizes resource allocation by changing the allocation mode parameter based on the relationship between recovery timer and latency budget parameters. This parameter-based decision framework improves resource allocation optimization while maintaining relatively simple decision-making through straightforward parameter comparison.
Data Source
AI summary
In one embodiment, a method for performing an operation for a first terminal in a wireless communication system comprises the steps of: determining that a physical layer problem has occurred during communication with a base station; starting a recovery timer for the physical layer problem; and transmitting, to a second terminal, sidelink data by using a sidelink resource, wherein the first terminal determines whether to perform switching from resource allocation mode 1 to resource allocation mode 2 in consideration of the latency budget of the sidelink data and the expiration time of the recovery timer.