Dynamic PSM Transmission for V2X Safety

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Solution Overview

Problem

Vehicle-to-everything (V2X) communication systems face challenges in efficiently transmitting personal safety messages (PSMs) due to frequent transmissions draining battery power and consuming network resources, while also overwhelming device and network resources with large numbers of messages, leading to unnecessary resource consumption and congestion.

Innovation Solution

Implementing a multi-access edge computing (MEC) device to dynamically adjust PSM transmission rates based on user device location, speed, and vulnerability, using real-time kinematics for location refinement, and filtering/aggregating messages to reduce resource load and conserve resources.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If frequent PSM transmissions are implemented to improve VRU safety, then safety monitoring is enhanced, but battery power and network resources are drained

Engineering Contradiction:

ImproveVRU safety monitoringVSAvoidbattery power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically adjusts PSM transmission rates based on real-time conditions. When a VRU is in a high-risk location (e.g., roadway), the transmission rate increases to provide frequent safety updates. When the VRU is in a low-risk location (e.g., sidewalk), the transmission rate decreases to conserve battery power. This dynamic adaptation resolves the contradiction by making the transmission frequency flexible rather than fixed.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the transmission parameter (PSM transmission rate) based on the VRU's location and risk level. By modifying this parameter dynamically, the system achieves high safety monitoring when needed while reducing power consumption when the VRU is in safe locations, thus resolving the contradiction between safety and power usage.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If frequent PSM transmissions are implemented to improve VRU safety, then safety monitoring is enhanced, but network resources are consumed

Engineering Contradiction:

ImproveVRU safety monitoringVSAvoidnetwork resources

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The system dynamically adjusts PSM transmission rates based on real-time conditions. When a VRU is in a high-risk location (e.g., roadway), the transmission rate increases to provide frequent safety updates. When the VRU is in a low-risk location (e.g., sidewalk), the transmission rate decreases to conserve network resources. This dynamic adaptation resolves the contradiction by making the transmission frequency flexible rather than fixed.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the transmission parameter (PSM transmission rate) based on the VRU's location and risk level. By modifying this parameter dynamically, the system achieves high safety monitoring when needed while reducing network resource consumption when the VRU is in safe locations, thus resolving the contradiction between safety and network resource usage.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If all PSMs are transmitted to ensure comprehensive safety coverage, then safety is improved, but device and network resources are overwhelmed

Engineering Contradiction:

Improvesafety coverageVSAvoidresource load

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system applies different transmission qualities to different VRUs based on their locations. VRUs in high-risk areas (roadways) receive frequent PSM transmissions, while VRUs in low-risk areas (sidewalks) receive less frequent transmissions. This local differentiation ensures comprehensive safety coverage where needed while reducing the overall resource load on devices and networks.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Instead of transmitting PSMs uniformly to all VRUs, the system applies partial action by selectively transmitting to only those VRUs who need safety monitoring at any given moment. This approach provides sufficient safety coverage for vulnerable users while avoiding the excessive resource consumption that would result from universal frequent transmission.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS11595802B2Systems and methods for controlling vehicle-to-everything personal safety message transmission

Publication Date: 2023.02.28 VERIZON PATENT & LICENSING INC

AI summary

A device may receive, from a user device, a vehicle-to-everything (V2X) personal safety message (PSM) that includes an indication of a location of the user device. The device may determine a relaying action to be performed by the device with respect to the PSM based on the location of the user device, wherein the relaying action includes at least one of: relaying the PSM to one or more V2X devices in a vicinity of the device, refraining from relaying the PSM to the one or more V2X devices, or transmitting an aggregate PSM that is generated based on multiple PSMs, including the PSM, received from multiple user devices. The device may perform the determined relaying action.