V2X Discovery Token Authentication via GeoNetworking

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Solution Overview

Problem

V2X communication systems face challenges with limited channels and high latency, requiring an efficient method for device discovery and authentication to ensure reliable and accurate message transmission, especially when V2X devices are outside the DSRC communication range.

Innovation Solution

A data communication method for V2X devices that includes transmitting a device discovery message with a first authentication token, receiving a discovery response message with a second authentication token, and performing security authentication, while maintaining a trust discovery list for secure communication without constant connection to an ITS-station discovery server, and utilizing GeoNetworking for extended device discovery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If V2X devices perform security authentication with an ITS-station discovery server for every communication, then security reliability is improved, but communication latency increases and channel efficiency deteriorates

Engineering Contradiction:

Improvesecurity authentication reliabilityVSAvoidauthentication time latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by performing security authentication in advance before actual data communication. Devices exchange authentication tokens and establish security sessions beforehand, allowing subsequent communications to occur without repeated authentication delays. The trust discovery list stores pre-authenticated device information, enabling quick verification during device discovery without real-time server intervention.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements nesting by embedding authentication tokens within device discovery messages. The authentication credentials are nested inside the discovery message structure, allowing simultaneous device discovery and authentication verification. This nested approach enables the receiving device to verify authentication status locally without requiring separate authentication communication channels.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Reliability

If V2X devices establish security sessions continuously with the ITS-station discovery server, then security reliability is improved, but channel occupancy increases and communication efficiency deteriorates

Engineering Contradiction:

Improvesecurity session reliabilityVSAvoidchannel communication efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies periodic action by establishing security sessions only when needed for specific communication purposes rather than maintaining continuous connections. Authentication tokens have expiry times and are renewed periodically based on communication requirements. The trust discovery list is updated periodically with fresh authentication information, allowing channels to remain free for data transmission between authentication cycles.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent implements self-service by enabling devices to perform local authentication verification using embedded tokens in discovery messages. The receiving device can independently verify the sender's authentication status without requiring real-time server involvement. This self-verification capability eliminates the need for continuous server connections, freeing communication channels for productive data exchange.

Inventive Principle:

Principle #25Self-service

3Reliability

If V2X communication is limited to DSRC communication range, then communication reliability is improved, but device discovery capability deteriorates

Engineering Contradiction:

Improvecommunication reliabilityVSAvoiddevice discovery range

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent uses GeoNetworking as an intermediary layer between DSRC communication and device discovery. GeoNetworking messages can be routed beyond direct DSRC range through intermediate nodes, extending the discovery capability while maintaining security through embedded authentication tokens. The authentication mechanism works across multiple hops, allowing devices outside direct DSRC range to be discovered and authenticated securely.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent transitions from single-hop DSRC communication to multi-hop GeoNetworking routing, adding a spatial dimension to device discovery. Instead of being limited to devices within direct transmission range, the system can discover and authenticate devices across extended networks by routing discovery messages through intermediate nodes, effectively expanding the discovery dimension from local to regional scope.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS11477648B2V2X communication device autentication token in discovery response message and data communication method thereof

Publication Date: 2022.10.18 LG ELECTRONICS INC

AI summary

Disclosed is a data communication method of a V2X communication device. The data communication method of a V2X communication device comprises the steps of: transmitting a device discovery message; receiving, from an external V2X communication device, a discovery response message for the device discovery message; and performing a security authentication authenticating a second authentication token included in the discovery response message.