On-vehicle Communication Device Dedicated Source Port Assignment

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Solution Overview

Problem

Existing communication systems between on-vehicle devices and service providers face complexity in distinguishing and charging for data traffic from different service providers, requiring complicated processing to differentiate between service content and providers.

Innovation Solution

A communication management method that uses flag transmission to assign dedicated source ports for each function enabled, allowing clear division of data traffic and costs without complex processing, utilizing a management server and on-vehicle communication devices to manage communications and charge destinations based on these ports.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If an identifier is added at a shorter data interval or for each packet to distinguish data from different service providers, then measurement precision is improved, but device complexity increases due to more complex processing requirements at the communication carrier

Engineering Contradiction:

Improvedata traffic distinction accuracyVSAvoidprocessing complexity at communication carrier

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent segments data traffic by assigning dedicated source ports to different service providers and functions. Instead of adding identifiers to each packet, the system divides the network traffic into separate streams using port numbers, making it easier for the communication carrier to distinguish and manage data from different sources without complex processing

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a management server as an intermediary that handles the complexity of port assignment and identification. The management server assigns dedicated source ports to different functions and provides this information to the communication carrier, eliminating the need for the carrier to perform complex analysis of packet contents

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If source port randomization is performed to ensure security, then reliability is improved, but device complexity increases due to more complex port management

Engineering Contradiction:

Improvecommunication securityVSAvoidport management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies local quality by assigning dedicated source ports to specific functions and service providers. Instead of randomizing ports globally, the system uses fixed, dedicated ports for specific purposes, making port management simpler while maintaining security through function-based isolation

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The management server performs preliminary action by pre-assigning dedicated source ports to different functions before data communication begins. This preliminary port assignment eliminates the need for runtime port randomization and simplifies carrier-side processing while maintaining security

Inventive Principle:

Principle #10Preliminary action

3Ease of operation

If data communications are made without dedicated ports, then ease of operation is improved, but measurement precision deteriorates due to inability to distinguish data traffic from different services

Engineering Contradiction:

Improvecommunication simplicityVSAvoiddata traffic distinguishability

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The patent segments data traffic using dedicated source ports for different functions and service providers. This segmentation allows the communication carrier to easily distinguish between different data streams without complex processing, maintaining operational simplicity while achieving precise traffic differentiation

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the network parameter (source port number) to distinguish between different services and service providers. By using dedicated port numbers instead of randomization or packet-level identifiers, the system achieves clear data traffic distinguishability while maintaining ease of operation at the carrier level

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11825145B2On-vehicle communication device and communication management method

Publication Date: 2023.11.21 MAZDA MOTOR CORP

AI summary

A communication management method includes: flag transmission of transmitting, to an on-vehicle communication device, identification flag information for identifying a function to be enabled among a plurality of functions of a vehicle, using a management server; port assignment of assigning different dedicated source ports for respective functions to be enabled based on the identification flag information, using the on-vehicle communication device, upon receipt of the identification flag information; and data communications for the respective functions assigned to the dedicated source ports in the port assignment via the dedicated source ports to allow a communication carrier to accumulate data traffic for the respective functions, using the on-vehicle communication device.