V2X Link Adaptation Using Movement-Aware MCS Selection
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Solution Overview
Problem
Existing link adaptation techniques in V2X communication systems fail to efficiently adjust modulation and coding schemes based on the dynamic movement and changing conditions of vehicles, leading to suboptimal data transfer rates.
Innovation Solution
A method and device for adapting links in V2X communication systems that utilize device state information, including relative movement and load side base station terminals, to determine an appropriate modulation and coding scheme (MCS) level, adjusting for target block error rate (BLER) and considering movement speed, thereby enhancing data transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If link adaptation is performed using traditional methods without considering relative movement information, then the basic communication function is maintained, but the data transfer rate is suboptimal and cannot adapt to dynamic vehicle movement conditions
Solution Approach 1:
The patent applies dynamics by making the link adaptation process dynamic and responsive to changing conditions. The system continuously monitors relative movement information between vehicles and adjusts MCS levels in real-time based on current motion states, rather than using static adaptation parameters. This enables the communication link to dynamically optimize its performance according to varying vehicle speeds and relative positions.
Solution Approach 2:
The patent implements parameter changes by modifying the MCS level parameter based on relative movement information. The system changes the modulation and coding scheme parameters (such as modulation order and coding rate) according to the detected movement characteristics, thereby optimizing the data transfer rate for each specific movement condition while maintaining reliable communication.
2Productivity
If MCS level is adjusted frequently to adapt to changing channel conditions, then link adaptation efficiency is improved, but communication reliability may deteriorate due to excessive adjustments
Solution Approach 1:
The patent applies partial action by adjusting the MCS level to appropriate degrees rather than making extreme or excessive changes. The system optimizes the MCS level based on the actual movement conditions, making moderate adjustments that balance adaptation efficiency with communication stability. This prevents overly aggressive MCS changes that could harm reliability while still achieving sufficient performance improvement.
3Productivity
If link adaptation parameters are set to prioritize data transfer rate, then productivity is improved, but the ability to maintain stable connection under varying movement conditions deteriorates
Solution Approach 1:
The patent uses parameter changes by adjusting MCS levels based on relative movement information to optimize the balance between data transfer rate and connection stability. The system changes communication parameters dynamically according to movement conditions, allowing higher data rates when movement is stable and reducing rates when movement causes channel fading, thereby maintaining overall connection stability while maximizing productivity.
Data Source
AI summary
According to the exemplary embodiment of the present disclosure, the method and the device for adapting a link of a V2X communication system acquires an appropriate parameter value to efficiently perform the link adaptation in the V2X communication system, thereby improving an average data transfer rate, determines an MCS level based on the state value (effective SNR) acquired in consideration of the device movement speed to build a V2X communication system which adaptively operates according to the state of the device.