V2X Resource Selection Using Receiver Feedback to Cut Interference
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Solution Overview
Problem
In vehicle-to-everything (V2X) communication, especially in scenarios with severe signal attenuation, resource collisions and interference occur due to UE's inability to sense reserved resources of other UEs, leading to poor adaptability and inefficient resource allocation.
Innovation Solution
A communication method where a first terminal apparatus detects sidelink control information from other terminals to determine unavailable resources, sends triggering information to another terminal to determine available resources, and uses both sensing results to select an appropriate resource for data transmission, reducing interference and collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UE autonomously selects resource based on sensing result, then resource allocation adaptability is improved, but resource collision and interference increase when signal attenuation is severe
Solution Approach 1:
The receiving UE feeds back resource indication information to the transmitting UE, creating a feedback loop that allows the transmitting UE to adjust its resource selection based on the receiving UE's sensing results and channel conditions, thereby resolving the contradiction between autonomous adaptation and collision avoidance
Solution Approach 2:
The receiving UE acts as an intermediary by providing resource indication information that mediates between the transmitting UE's autonomous resource selection and the actual channel conditions, enabling more reliable resource selection without compromising adaptability
2Speed
If transmitting UE excludes resources based on its own sensing result, then resource selection speed is improved, but resource waste increases due to inability to sense distant transmit UE resources
Solution Approach 1:
The receiving UE provides feedback information about resources it has sensed, allowing the transmitting UE to identify and utilize resources that would otherwise be wasted, thereby improving resource utilization efficiency while maintaining fast resource selection
Solution Approach 2:
The receiving UE serves as an intermediary sensor that extends the transmitting UE's sensing capability to distant resources, enabling the transmitting UE to identify usable resources beyond its own sensing range without slowing down the resource selection process
Data Source
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AI summary
This application provides a communication method and apparatus that can be used in fields such as V2X, an internet of vehicles, intelligent driving, assisted driving, and connected vehicles. The method includes: A first terminal apparatus detects SCI from at least one second terminal apparatus, to determine a first resource, where the first resource includes a resource unavailable to send data to a third terminal apparatus. The first terminal apparatus sends, to the third terminal apparatus, first information for triggering determining of second information, and receives the second information from the third terminal apparatus, where a second resource indicated by the second information is for determining a resource used by the first terminal apparatus to send the data. The first terminal apparatus determines, based on the first resource and the second resource, the resource for sending the data. The first terminal apparatus selects, based on a sensing result of the first terminal apparatus and the resource recommended by the third terminal apparatus, the resource for sending the data, so that both interference around the first terminal apparatus and interference around the third terminal apparatus are considered, thereby reducing interference and improving communication quality.