GLUE Project: A Geo-cache based Mobile Sensor Network System Bin - - PowerPoint PPT Presentation

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GLUE Project: A Geo-cache based Mobile Sensor Network System Bin - - PowerPoint PPT Presentation

May 02, 2023 430 likes •629 views

GLUE Project: A Geo-cache based Mobile Sensor Network System Bin Zan,Tingting Sun, Marco Gruteser, Yanyong Zhang WINLAB, Rutgers University {zanb,tsun,gruteser,yyzhang} @winlab.rutgers.edu 1 Mobile Sensor Networks Technology trends

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GLUE Project: A Geo-cache based Mobile Sensor Network System

Bin Zan,Tingting Sun, Marco Gruteser, Yanyong Zhang WINLAB, Rutgers University {zanb,tsun,gruteser,yyzhang} @winlab.rutgers.edu

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Mobile Sensor Networks

Technology trends

Increasing integration of

sensors into mobile platforms

Accurate localization Large storage

Applications

accident analysis and

avoidance

dynamic noise pollution

mapping through cell phone

pothole detection

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Pothole Detection Example

Basic centralized approach: Transmit all data to external server

immediately

Pro: complete information available at the server Con: will soon saturate server capacity

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Pothole Detection Example

Basic distributed approach: Store locally and retrieved by

server later

Pro: no servers storage required Con: high retrieval overhead

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Challenge in Mobile Sensor Networks

  • How do we efficiently manage

mobile sensor data for applications that need to access information from multiple nodes?

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Key idea: tie data to the location

Car 1: Here might be a pothole Car 4: Here might be a pothole Car 8: Here might be a pothole … 1 8 4

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The Geo-Cache Concept Query

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The Geo-Cache entries and I-page

  • Geo-cache page is the

basic storage unit

  • Geo-cache page is

bound to “Anchor Location”

  • Each entry is a 4-

attribute tuple

  • I-page contains the latest

entries about a location and is kept around the location

  • Older entries can be

accessed through chaining

A

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Miss something?… Answer: the anchoring protocol How do the moving nodes hand off the Geo-Cache page among themselves?

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Anchoring Protocol: Relay

Relay Geo-cache Mode

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Anchoring Protocol: Boomerang

Boomerang Geo-cache Mode

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More about anchoring protocol

  • Switching
  • high geo-cache coverage (relay)
  • short geo-cache delay (relay)
  • low communication overhead (boomerang)
  • low node density (boomerang)
  • Reliability
  • Energy Efficiency

Achieve reliability in boomerang mode

…

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Preliminary Evaluation

  • ns2

NS-2 simulation, with a 70-km two-lane road Pothole in the middle of the road Each data point averaged over 1000 situations Average speed 30m/s, and radio range 100m

mean inter-car distance detection probability % mean message per car mean message per car Broadcast Relay Relay Boomerang

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Event Detection Module

Applications

Event Detection Module Event Detection Module Event Aggregation Module Event Aggregation Module Event Aggregation Module In-Car Sensor In-Car Sensor In-Car Sensor Camera Other Sensor Other Sensor Other Sensor GPS I-page Relay Mode Boomerang Mode Storage Radio

Glue Subsystem

Implementation

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Data Collection

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Summary

Propose a distributed sensing and monitoring system for highly mobile vehicular networks named GLUE

  • Geo-cache
  • Anchoring protocol

The system is relying on inter-vehicle communication to exchange sensed and aggregated information. The Geo-cache abstraction allows nodes to specify a geographic location to store information.

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Questions?