Wireless Terminal Transmission Buffer Switching Control for V2X
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Solution Overview
Problem
Current ProSe systems face challenges in supporting Vehicle-to-Everything (V2X) communication, particularly in dense urban areas where V2V and V2I communications require efficient resource management and low latency, and existing solutions are not optimized for vehicle speeds, leading to unstable ITS services and high collision probabilities.
Innovation Solution
A method for performing switching control between uplink (UL) and sidelink (SL) in a wireless communication system, where a switching layer determines the transmission direction based on received control information, allowing for efficient selection between UL and SL for V2X communication, and a transmission buffer management system to handle link changes effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If V2X communication uses sidelink (SL) in dense urban areas, then direct vehicle-to-vehicle communication is enabled, but resource collision probability increases and service stability deteriorates
Solution Approach 1:
The patent implements dynamic switching between UL and SL transmission modes based on real-time network conditions and control information from the base station. The terminal can adaptively change transmission paths depending on whether it is in coverage area and what the base station indicates, resolving the contradiction by making the system flexible rather than fixed in one mode
Solution Approach 2:
The patent changes the transmission mode parameter dynamically - switching between UL (uplink) and SL (sidelink) based on received control information and coverage conditions. This parameter change allows the system to optimize for either direct communication or network-assisted communication depending on the situation, improving both efficiency and stability
2Reliability
If V2X communication uses uplink (UL) with base station assistance, then resource management is improved, but latency increases due to network processing
Solution Approach 1:
The patent implements dynamic switching between UL and SL transmission modes based on real-time network conditions and control information from the base station. The terminal can adaptively change transmission paths depending on whether it is in coverage area and what the base station indicates, resolving the contradiction by making the system flexible rather than fixed in one mode
Solution Approach 2:
The base station acts as an intermediary that provides control information to guide terminal transmission mode selection. The control information contains instructions on when to use UL versus SL, allowing the base station to manage resources efficiently while enabling low-latency direct communication when appropriate
3Device complexity
If transmission mode is fixed, then system complexity is reduced, but adaptability to different V2X scenarios deteriorates
Solution Approach 1:
The patent implements dynamic switching between UL and SL transmission modes based on real-time network conditions and control information from the base station. The terminal can adaptively change transmission paths depending on whether it is in coverage area and what the base station indicates, resolving the contradiction by making the system flexible rather than fixed in one mode
Data Source
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AI summary
Provided is a method for operating a transmission buffer in a wireless communication system. The method is performed by a user equipment (UE), and comprises detecting, in a switching layer, whether a transmission of data on a first transmission link is successful via the lower layer, determining whether to keep the transmission of the data on the first transmission link or to perform the transmission of the data on a second transmission link when the transmission of the data is not successful and performing the transmission of the data on the determined transmission link.