Roadside Unit V2X Message Broadcasting
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Solution Overview
Problem
In vehicle-to-everything (V2X) communication, direct communication between vehicles can be hindered by resource collisions, Doppler shifts, and limited direct communication ranges, making it challenging to maintain communication quality and ensuring safety features like collision warnings and autonomous driving.
Innovation Solution
Deploying a roadside unit (RSU) that receives and broadcasts messages from one vehicle to other vehicles, using licensed or dedicated spectrum for efficient data transmission, and configuring resources for broadcast transmission to ensure reliable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If direct communication between vehicles is used, then communication simplicity is maintained, but communication quality and reliability deteriorate due to resource collisions and range limitations
Solution Approach 1:
The patent introduces a Road Side Unit (RSU) as an intermediary infrastructure component that receives messages from vehicles and forwards them to other vehicles. This mediator resolves resource collisions by centralizing message management and extends communication range beyond direct vehicle-to-vehicle links, thereby improving communication quality and reliability without significantly increasing overall system complexity.
2Reliability
If roadside unit is deployed for message forwarding, then communication reliability is improved, but system complexity increases
Solution Approach 1:
The RSU is designed to perform multiple functions: receiving messages from vehicles, storing message data, determining transmission timing based on received signal strength indicators (RSSI), and forwarding messages to other vehicles. This multi-functionality consolidates various communication tasks into a single infrastructure component, improving reliability while managing system complexity through functional integration rather than proliferation of separate components.
Solution Approach 2:
The RSU autonomously determines when to forward messages by comparing RSSI values of received messages against threshold values, without requiring constant network controller intervention. This self-service capability allows the RSU to make real-time forwarding decisions independently, improving communication reliability while reducing the operational complexity of managing the RSU network.
3Length of stationary object
If message forwarding via RSU is implemented, then communication range is extended, but resource management complexity increases
Solution Approach 1:
The system pre-configures threshold values for RSSI that determine when message forwarding should occur. The RSU compares received message RSSI against these pre-set thresholds to decide whether to forward messages, eliminating the need for complex real-time resource negotiation and simplifying resource management while extending communication range through intelligent, pre-planned forwarding decisions.
Data Source
AI summary
A method and apparatus for transmitting information in a wireless communication system is provided. A road side unit (RSU) for vehicle-to-everything (V2X) communication receives a message indicating an event from a vehicle user equipment (V-UE), and broadcasts information on the event to other V-UEs.