Sidelink Resource Determination for V2X Communication
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Solution Overview
Problem
Current sidelink communication systems in V2X technology face inefficiencies in resource sensing, leading to low sensing efficiency and resource conflicts due to hidden and exposed node problems.
Innovation Solution
A transmission resource determining method where terminal devices send sidelink control information and data indication information to determine available resources, avoiding resource conflicts by distinguishing between receiving and sending data resources based on indication fields and thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal devices use traditional sensing methods to determine sidelink resources, then resource allocation can be achieved, but sensing efficiency is low and resource conflicts occur due to hidden and exposed node problems
Solution Approach 1:
The patent segments sidelink resources into two distinct types: Type 1 resources (for receiving data) and Type 2 resources (for sending data). This segmentation is achieved through separate indication fields in the information exchanged between terminal devices. By dividing resources into these two categories, the system resolves the hidden node problem because a terminal can identify whether it should send or receive on a particular resource, preventing conflicts where one terminal sends while another expects to receive on the same resource.
Solution Approach 2:
The patent introduces an intermediary information exchange mechanism where terminal devices share resource type indications with each other. This intermediary information (the indication fields specifying resource types) acts as a mediator that allows terminals to make informed decisions about resource usage without directly detecting each other's transmissions, thereby improving sensing efficiency and reducing conflicts.
2Productivity
If terminal devices determine resources through sensing with signal strength thresholds, then resource selection is possible, but hidden node problems cause resource conflicts
Solution Approach 1:
The patent applies preliminary action by having terminal devices exchange resource type indication information before actually using the sidelink resources. This advance information exchange allows terminals to pre-determine whether a resource is for sending or receiving data, enabling them to make informed resource selection decisions before transmission begins, thereby preventing hidden node conflicts and improving overall resource utilization.
3Ease of operation
If traditional sidelink sensing is used without resource type differentiation, then resource determination is simple, but exposed node problems reduce sensing efficiency
Solution Approach 1:
The patent applies local quality by assigning different properties to different resources through the indication fields. Each resource is locally differentiated as either Type 1 (receive) or Type 2 (send) based on the specific communication needs. This local differentiation allows terminals to optimize their sensing and resource selection behavior for each resource type, improving sensing efficiency while maintaining operational simplicity through standardized indication mechanisms.
Data Source
AI summary
With development of communications technologies, an internet-of-vehicles technology for vehicle-to-everything (V2X) communication is proposed. In this application, a third device receives first information and/or sidelink control information. The first information includes indication information of a first resource set, the first resource set is for receiving data, the sidelink control information includes indication information of a second resource set, and the second resource set is for sending data. The third device determines an available resource in the first resource set, and/or determines an available resource in the second resource set. The method can resolve a hidden node problem and an exposed node problem on a sidelink.