Sensor Networks Field Servers and MeBroker

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Sensor Networks(Field Servers and MeBroker)

• Takuji Kiura
• Masayuki Hirafuji
• Aatsushi Yamakawa
• Seishi Ninomiya
• National Agricultural Research Center

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• Field Server

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Sensor Network Nodes
UC Berkley, Smart Dust http//robotics.eecs.berkel
ey.edu/pister/SmartDust/
TIN-AMEDES http//www.tini.org/
MICA2DOTwww.xbow.com
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Sensor Network Nodes
Intel
NASA
Mitsubishi
Hitachi
NEC
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Field Server II (NARC)

• Case Acryl resin
• Core Field Server-Engine or PICNIC
• Sensors Temperature, Humidity, PPFD Soil
  moisture, Leaf-wetness UV, IR CO2
  Camera, Microscope
• Data-collection and AI Fieldserver-Agent
• Networking Wi-Fi AP, Fieldserver-Gateway
• GRID MetBroker

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Multi-functional Airflow in Field Server

• Cooling
• Accurate Measurement Assmann's aspiration
  psychrometer
• Air-temperature
• Humidity
• Sampling
• Gas (CO2, NOx, SOx)
• Insects
• Microbes
• Virus
• Dusts

Filter or Sampler
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Accuracy
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WDS Wi-Fi Hotspot

Cable
Solar-energy Driven Field Servers(Client
connection, Intermittent work)
Hotspot
Repeating by WDS (Wireless Distributed System)
Conventional Field Servers (Access-point,
Continuously work)
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Full-Wireless Field ServersIntermittent Drive
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(No Transcript)
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Trial Sites of Field Servers
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Field Server Model (by NECTEC)

• 8 channels
• Store to Compact Flash (up to 1GB)
• Time interval from 10 sec. to 24 hr.
• Easy , Cheap
• Battery backup

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Field server-Agentfor Data-Collection and Control
XML rule-base
Rule-base editor on Web
Open DB Web
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VPNField Server Gateway
Firewall
Firewall
Private network of Field servers
Global IP
Field server-Agent (Web crawler controller)
FSG
Cellar
Private IP
FSG
Cable
Global IP
Web Server
VPN router
ADSL
PC-Cluster
The Internet
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Options for Field Servers
Insect counter
Multi stack small solar Panel
Large Solar Panel
Thermal Camera
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• Field Servers and MetBroker

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Applications for MetBroker
Rice growth model
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MetBlastamRice Blast Prediction Model Using
MetBroker


Infective condition
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Field Servers linked to MetBroker
Client APP
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Weather DB
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DB
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DB
Client APP
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DB
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DB
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DB
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DB
Weather DB
MetBroker
MetBroker
MetBroker
MetBroker
MetBroker
Client APP
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Weather DB
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DB
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DB
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DB
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DB
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DB
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DB
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DB
Weather Data XML
FieldServerDB
FieldServerDB
FieldServerDB
Field Server DB
Field Server Data Archive
Station Conf. XML
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Demo for Spacial Access of MetBroker
Field Servers
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Field Server Data

• Different Type of Sensors, Time Resolution
• Described in XML files (w/o standard)
• Semantic Problems
• Sensors are added or removed
• Time resolution may be changed.
• Small data size (1KB10MB) for each.

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MetBroker

• Adding new databases
• writing new DB wrappers
• Restarting MetBroker
• Adding new observation Items
• Data Modeling for each item
• Writing new data object for each item

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System Overview (New MetBroker)
Metadata database
Decision-Making Support Services Operational
Products Simulation Models Detailed
Digital Forecast
Item Definition OWL
Station metadata RDF
2. Request
3. Request metadata
1. Register
Meteorological databases
DB Wrapper
Inference Engine
Broker
DB Wrapper
DB Wrapper
4. Request data
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Roles of the RDF/OWL files
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New MetBroker

• Adding new databases
• writing Item Definition Station Metadata
• Adding new observation Items
• Adding new basic vocabraly

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Field Servers linked to New MetBroker

• New MetBroker can integrate Field Server data
  with other weather database.
• New MetBroker can integrate other point data
  (data from other passive sensor networks).
• RDF/OWL technologies are useful for data
  integration in a specific and small problem
  domain i.e. meteorological data integration.

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Agricultural Sensor GridData Grid Sensor Net
Active Database
Metadata Service
Ontology registry

• ToDo
• Rule-base xml to RDF, OWL converter
• Separation Metadata service, Ontology registry,
  and MetBroker
• OGSA compliant
• Support XML-DB
• Data cashing
• Rule-based data pushing
• Rule-based data file creation and execution of
  existing programs
• etc.

GRID File System (Gfarm?)
MetBroker
Storage/Application Web Server (Native XML-DB)
Local network of Field servers
Agent Server Rule-base Editor Meta-rule Agent
Field server-Agents Web crawler Remote Controller
The Internet
Local Agent, Storage and MetBroker
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Earth Observation Data Fusion Project (Japan,
2005-2007)

• Data Service
• Huge Database, Active Database
• Ontology Registry
• Seamless access to an application related data
• Data Collection
• Application

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Field Servers at Tsukuba Style Festahttp//model.
job.affrc.go.jp/FieldServer/TsukubaStyleFesta.html
Field Server
WDS connection
Wi-Fi HotSpot
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Field Servers at Tsukuba Style Festa
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Field Servers at Tsukuba Style Festaby Tsukuba
University
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Field Servers at Tsukuba Style Festaby Panasonic