V2X Resource Indication Method for Conflict Avoidance
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Solution Overview
Problem
In vehicle-to-everything (V2X) communication, especially in mode two where UEs autonomously select resources, there is a lack of effective methods to prevent resource conflicts between communication nodes when sharing transmission opportunities on unlicensed carriers, particularly in scenarios involving Listen Before Talk (LBT) channel occupancy time.
Innovation Solution
A resource indication method where communication nodes exchange resource usage information, including position and assignment order, to determine availability and avoid conflicts, utilizing a communication module to receive and process this information to select available transmission opportunities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UEs autonomously select resources in mode two without central node scheduling, then resource allocation flexibility is improved, but resource conflicts between UEs increase
Solution Approach 1:
The patent applies preliminary action by having UEs perform sensing operations before resource selection to identify resources that are not currently being used by other UEs. This advance detection of resource usage status allows UEs to select from pre-identified available resources, preventing conflicts before they occur while maintaining autonomous selection flexibility
Solution Approach 2:
The patent implements feedback mechanisms where UEs exchange resource usage information through SCI messages. Each UE provides feedback about its selected resources and retransmission resources to other UEs in the group, enabling other UEs to adjust their selections and avoid conflicts. This continuous information exchange maintains both autonomy and conflict prevention
2Productivity
If UEs share transmission opportunities on unlicensed carriers through LBT, then channel access efficiency is improved, but resource multiplexing capability deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the channel occupancy time into distinct transmission opportunities with specific structures. Each transmission opportunity contains control information that segments and communicates resource allocation details to other UEs, enabling multiple UEs to multiplex resources efficiently while maintaining LBT-based access efficiency
Solution Approach 2:
The patent introduces SCI (Sidelink Control Information) as an intermediary mechanism that carries resource usage information between UEs. This intermediary enables resource multiplexing by allowing UEs to learn about each other's resource selections and adjust accordingly, while the LBT procedure maintains channel access efficiency
3Reliability
If UEs reserve resources for periodic services, then service reliability is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent applies dynamics by making resource reservations adaptable rather than fixed. UEs can indicate their resource usage patterns through SCI, allowing other UEs to dynamically adjust their selections. Retransmission resources are specifically designated and communicated, enabling reliable periodic service while allowing other UEs to utilize non-reserved resources, thus improving overall utilization efficiency
Data Source
AI summary
Provided are a resource indication method, a node and a storage medium. The resource indication method includes: receiving, by a first communication node, resource usage information, where the resource usage information includes resource position information of at least one transmission opportunity and a resource assignment order (RAO) or a set of to-be-used resources; and determining, by the first communication node, availability of a transmission opportunity according to the resource usage information.