Decentralized Network Content Persistence via Node Exit Transfer

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Solution Overview

Problem

In decentralized computing networks, content published within sub-grids of interest may be lost when nodes exit, disrupting the network's functionality and integrity.

Innovation Solution

Implement a method where nodes transferring content to another node within the sub-grid or establishing a partial presence to ensure persistence, either by selecting a volunteer node from outside the sub-grid or maintaining a partial presence until another node joins, ensuring continuous content provision.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If nodes are allowed to freely enter and exit sub-grids, then node mobility and adaptability are improved, but content persistence and network reliability deteriorate

Engineering Contradiction:

Improvenode mobilityVSAvoidcontent persistence

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The system performs preliminary actions by selecting a successor node before the exiting node actually leaves. When a node indicates its intent to exit, the system proactively identifies and prepares a replacement node, transfers content, and establishes the successor's responsibility before the original node completely departs. This prevents content loss and maintains persistence without restricting node mobility.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If content is transferred to another node when a node exits, then content persistence is improved, but system complexity increases

Engineering Contradiction:

Improvecontent persistenceVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system implements self-service mechanisms where exiting nodes actively participate in the content transfer process. When a node indicates it will exit, other nodes in the sub-grid autonomously select a successor, initiate content transfer, and update their routing tables. This distributed self-organization reduces the need for complex centralized management while ensuring content persistence.

Inventive Principle:

Principle #25Self-service

3Reliability

If a node establishes partial presence to maintain content, then content persistence is improved, but resource consumption increases

Engineering Contradiction:

Improvecontent persistenceVSAvoidresource consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system implements dynamic node presence states, allowing nodes to transition between full participation, partial presence, and complete exit. A node in partial presence maintains minimal connectivity and content responsibility only temporarily until a successor is established. This dynamic state management ensures content persistence while minimizing resource consumption during the transition period.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS7440428B2Method and system for persisting content in decentralized network

Publication Date: 2008.10.21 SONY INTERACTIVE ENTERTAINMENT LLC

AI summary

Methods are provided to ensure that content defining a sub-grid of a decentralized network continues to be provided to the sub-grid upon departure of a node from the sub-grid that has been responsible for providing the content. A node intent on exiting a sub-grid ensures that content for which it has service responsibility is appropriately transferred to another node prior to exiting the sub-grid, wherein the other node is capable of serving the transferred content to the sub-grid.