Heterogeneous Network Message Fragmentation and Priority Control

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Solution Overview

Problem

Heterogeneous network protocols face challenges in message transmission/reception due to differences in maximum transmission length, requiring fragmentation and reassembly, which leads to increased latency and disrupted message sequences across networks like CAN and Ethernet.

Innovation Solution

A method and apparatus that fragment messages into packets with adjustable arbitration fields to prioritize and maintain transmission continuity, ensuring seamless transmission across heterogeneous networks by managing fragmented packets and adjusting priorities based on message importance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If messages are fragmented to accommodate different maximum transmission lengths in heterogeneous networks, then adaptability between networks is improved, but transmission latency increases and message sequence integrity deteriorates

Engineering Contradiction:

Improveadaptability between networksVSAvoidtransmission latency

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent segments messages into fragments that can be transmitted across heterogeneous networks with different maximum transmission lengths. Each fragment is processed independently through fragmentation and reassembly operations, enabling adaptability between networks while managing the complexity of message transmission across networks with varying capacity constraints

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies preliminary actions by pre-processing messages at the gateway before transmission to fragment them appropriately for the target network. This preliminary fragmentation ensures that messages are prepared in advance for efficient transmission, reducing latency during actual network communication by avoiding on-the-fly processing delays

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If fragmented messages are transmitted separately, then adaptability to network constraints is improved, but message sequence integrity and transmission continuity deteriorate

Engineering Contradiction:

Improveadaptability to network constraintsVSAvoidmessage sequence integrity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements feedback mechanisms where the gateway monitors transmission status of fragmented messages and adjusts reassembly operations accordingly. This feedback loop ensures that fragments are correctly reassembled in the original sequence, maintaining message sequence integrity while allowing flexible transmission across network constraints

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent merges fragmented messages back into complete original messages at the destination node through reassembly operations. This merging process combines multiple fragments while preserving their original sequence and content, ensuring that the final reconstructed message maintains integrity despite having been transmitted as separate fragments across heterogeneous networks

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If separate management of fragmented messages is implemented, then network protocol compliance is improved, but device complexity and processing overhead increase

Engineering Contradiction:

Improveprotocol complianceVSAvoidbuffer management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements self-service mechanisms where the fragmentation and reassembly operations are performed automatically by the gateway and destination nodes without requiring complex manual management. The system self-manages the fragmentation process by automatically dividing messages, tracking fragments, and reassembling them in the correct sequence, thereby reducing processing overhead while maintaining protocol compliance

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent creates a universal fragmentation and reassembly mechanism that works across multiple heterogeneous network types (CAN, Ethernet, MOST) through a single standardized approach. This multi-functional system handles different network protocols and message formats using the same fragmentation principles, reducing device complexity by avoiding protocol-specific management overhead while ensuring broad protocol compliance

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS10230656B2Method and apparatus for controlling message over heterogeneous network

Publication Date: 2019.03.12 KOREA ELECTRONICS TECH INST

AI summary

Disclosed is a method for controlling a message over a heterogeneous network. The method includes receiving a first message from a first network, generating a plurality of second messages (a “plurality of fragmented messages”) each header including an arbitration field by performing fragmentation on the first message, and increasing priority of at least one remaining fragmented message by controlling the arbitration field of the at least one remaining fragmented message if the transmission of a first fragmented message over a second network is successful. An apparatus for performing the method includes a reception message processing unit, a transmission message processing unit, a transmission network sensing unit, and a message transmission continuity management unit. Accordingly, a method and apparatus for controlling a message over a heterogeneous network can be simplified, message transmission latency can be prevented, and a message transmission sequence can be maintained.