Mobile Gateway Wireless Sensor Network Energy Optimization

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional wireless sensor networks face inefficiencies and energy consumption issues due to frequent activation of sensor nodes by mobile data sinks, especially when the data collected does not change frequently, leading to unnecessary energy expenditure and potential data loss.

Innovation Solution

A method where a mobile gateway device maintains two tables - a depreciated node table and an appreciated node table - to track sensor nodes' data validity, activating only necessary nodes for data collection based on their validity timers, allowing other nodes to remain in a sleep mode to conserve energy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If a mobile data sink is used to geographically balance energy consumption, then energy distribution among sensor nodes is improved, but communication control overhead and topology transition delays increase

Engineering Contradiction:

Improveenergy consumption distributionVSAvoidcommunication control overhead

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The mobile sink performs preliminary actions by predicting future positions and proactively establishing data collection topologies in advance. The system calculates predicted positions based on mobility patterns and pre-configures routing paths, so when the mobile sink arrives at a position, data collection can immediately begin without waiting for reactive topology construction, thereby reducing control overhead and transition delays

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system dynamically adjusts the data collection topology based on the mobile sink's real-time position and predicted trajectory. Instead of using static topologies or rebuilding entire topologies at each position change, the system dynamically modifies existing routing paths and activates/deactivates sensor nodes based on current proximity to predicted positions, reducing the frequency and overhead of topology transitions

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If traditional data collection paradigm is adopted with mobile UE, then data collection flexibility is improved, but topology transitions cause time delay and data loss

Engineering Contradiction:

Improvedata collection flexibilityVSAvoiddata delivery continuity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The system performs preliminary actions by predicting future mobile sink positions and pre-establishing data collection topologies and routing paths before the mobile sink actually reaches those positions. This proactive approach ensures that when topology transitions are needed, they have already been prepared and can be executed with minimal disruption, maintaining data delivery continuity while preserving flexibility

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system maintains continuity of useful action by ensuring overlapping coverage between consecutive topologies. As the mobile sink moves from one predicted position to another, the system maintains active data collection from sensor nodes that are within range of either the current or predicted position, ensuring uninterrupted data flow during transitions and eliminating gaps that would cause data loss

Inventive Principle:

Principle #20Continuity of useful action

3Loss of information

If sensor nodes are frequently activated for data collection, then data freshness is improved, but energy consumption increases

Engineering Contradiction:

Improvedata freshnessVSAvoidsensor node energy consumption

Core Design Contradiction:

Loss of informationVSUse of energy by moving object

Solution Approach 1:

The system performs preliminary actions by predicting which sensor nodes will be within range of future mobile sink positions and pre-activating only those specific nodes. Instead of activating all nodes or using a large buffer zone, the system calculates exact predicted positions and identifies only the sensor nodes that will be necessary for data collection, activating them just in time before the mobile sink arrives, thereby maintaining data freshness while minimizing energy consumption

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system applies local quality by treating different sensor nodes differently based on their specific spatial relationship to predicted mobile sink positions. Rather than applying a uniform activation policy to all nodes, the system individually evaluates each node's proximity to predicted positions and activates only those locally relevant nodes, creating a non-uniform activation pattern that optimizes the balance between data freshness and energy consumption

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS9788228B2Mobile data collection in a wireless sensing network

Publication Date: 2017.10.10 AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE LTD

AI summary

A mobile gateway device collects identities of a first set of radio nodes which are within one hop of the mobile gateway; and checks at least the collected identities against a first table and a second table. The first table lists node identities and corresponding data validity timers. The second table lists node identities and no corresponding data validity timers. From the checking the device selects a group of radio nodes to activate for collecting and reporting data. The device determines parent child relations among the radio nodes, which are sensor nodes of a wireless sensing network in an embodiment, and uses the list to activate only those nodes for which it does not have valid data to sense new data and transmit their sensing results.