Study of RFID Middleware Framework for Ubiquitous Computing Environment ETRI

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Study of RFID Middleware Framework for Ubiquitous
Computing Environment - ETRI -

• Son Byung-kook

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Content

• Introduction
• Technical Trends of RFID
• Functional Requirements of RFID Middleware
• The RFID Middleware Framework
• Conclusions and Future Work

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Introduction

• Ubiquitous Computing Environment
• Various forms of technologies are needed
• Networking, telematics, industry automation
• Using RFID
• Requirement
• Tag, Reader, Middleware
• Goal
• Introduce RFID middleware framework for
  Ubiquitous Computing Environment
• For develop various RFID business applications

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Technical Trends of RFID(1)

• Standard
• International standard
• ISO/IEC, JTC1, SC31, WG4
• Interface readers and tags
• Interface readers and host
• Industry-driven standard
• EPCglobal
• EPC Network
• Ubiquitous ID Center
• Japan
• Ucode

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Technical Trends of RFID(2)

• SC31
• Made by ISO/IEC and JTC1
• Automatic recognition and data acquisition of
  bar-code, RFID
• Standard
• Data Syntax(SG1), Unique ID(SG2), Air
  Interface(SG3), Application Requirements(SG4)

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Technical Trends of RFID(3)

• Reader System Architecture of ISO/IEC

RF TAG
INTERROGATOR
APPLICATION
Decoder
Air Interface
Encoder
Tag Driver And Mapping Rules
Local Memory Map
antenna
Command Response Unit
RESPONSE
Logical Memory
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Technical Trends of RFID(4)

• EPC Network Architecture of Auto-ID

ONS
Enterprise Application(s)
- Local copy of frequently used ONS data -
Registration for static and dynamic ONS -
Collaboration on asset tracking
ONS(cache)

• Track and trace serial items
• Referencing business transactions
• Object type data
• Instance level EPC data
• Find grained access control policy implementation

EPC Information Service (EPC Database)
Internal Databases
Additional data

• Report data
• Manage readers
• Higher level filters

Savant
Update data

• Capture events data (tag and sensors)
• Simple filters

Reader

• Transmit EPC data using radio
• frequency
• - Transmit sensor data

Tag
Tag
Sensor
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Functional Requirement of RFID Middleware

• Integration Protocol for various readers
• Why?
• Use many kind of reader by needs
• Barcode reader, many kind of RFID readers
• How?
• Support various protocol of readers
• Guarantee independent between readers and
  applications

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Functional Requirement of RFID Middleware

• Data Filtering
• Why?
• RFID based system scan its area periodically
  (unlike barcode based system)
• About 100ms (10 100 event per second)
• Warehouse management system
• 10 events per sec -gt 1000 event while 10 sec
• Too much over-head for application
• How?
• Must put the middleware between the readers and
  Application system

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Functional Requirement of RFID Middleware

• Application Interface
• Why?
• Need to control heterogeneous readers at a same
  time
• Must offer the function that passes data to
  higher level safely
• How?
• Need to send command and receive result by
  application in convenience manner

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Functional Requirement of RFID Middleware

• Information Services of Tagged Objects
• Instance level information
• Date of manufacture, expiry data
• Class level information
• Product catalog information
• EPC Network
• ONS and PML
• Ubiquitous ID Center
• UIRS (Ubiquitous) and UISC (Ubiquitous
  Information Service Center)

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The RFID Middleware Framework

• Architecture of RFID Middleware Framework

Legacy Applicatioin
ERP
CRM
ETC
Etc
Etc
Object Name Service
Object Information Service
Static ONS
Dynamic ONS
Service Engine
Object Repository
Event Manger
Application Interface
Flow Designer
Flow Processor
Monitor
Service Listener
Filter
Queue
Logger
Message Processor
Reader Interface
Protocol Processor
Event Generator
Command Processor
Monitor
Various Reader
Alien Reader
Metrix Reader
Barcode reader
Etc
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The RFID Middleware Framework

• Architecture of RFID Middleware Framework
• Feature
• Integrated reader management
• Data filtering
• Stable communication with the application
• Offer real-time information for the tagged object

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The RFID Middleware Framework

• Reader Interface
• Protocol processor
• Access to the RFID reader via various network
  communication options
• RS232, TCP/IP
• Enable reader from many different manufacture
• One channel, two channel

command
Middle ware
Reader
Middle ware
Reader
Polling
response
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The RFID Middleware Framework

• Reader Interface
• Event Generator

SoftRead
unknown
FirmRead
Expired
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The RFID Middleware Framework

• Reader Interface
• Event Generator
• Generate the events
• Passes the events to Event Manager
• Generate the virtual tag event data
• Monitor
• Monitor RFID Reader performance
• Manage reader deployed to the middleware

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The RFID Middleware Framework

• Event Manger
• Functionality
• Filtering, aggregation, routing the RFID events
• Notify interested external system of the data
• Basic filter
• Eliminate the redundant tag read events
• ID-based Filtering
• Filtering based on reader identity
• Multi readers
• Reader coordination algorithm

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The RFID Middleware Framework

• Event Manger
• Flow Designer
• How the event data can be filtered, buffered,
  logged
• Flow Processor
• Instantiates and executes the process modules
• Module is designed by Flow Designer

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The RFID Middleware Framework

• Application Interface
• Functionality
• Offers interface so that application could
  control readers
• Service Listener
• Received the order of the application
• Offer the communication function
• XML-RPC, SOAP-RPC, Web-service

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The RFID Middleware Framework

• Application Interface
• Message Processor
• Analyzes the delivered order
• Passes order it Command Processor
• Receives a response from the Command Processor
• Return received response to the application

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The RFID Middleware Framework

• Application Interface

Application System

Object Information Service
Reader Interface
App
Flow Designer
Order (XML-RPC, SOAP-RPC,
Web-Service)
App
Flow Processor
Command Processor
Analysis
App
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The RFID Middleware Framework

• Object Information Services
• Functionality
• Share the information that it maintains with
  other systems
• Enable the data exchange among system
• Object Repository
• Store information related to tagged objects
• Available for later query
• Service Engine
• Interface for providing information managed by
  Object Repository

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The RFID Middleware Framework

• Object Naming Services
• A directory service
• Matches the unique code and networks location
  address (URL)
• Static ONS
• Provides URLs for information about an object
• Dynamic ONS
• Serves a sequence of Object Information Service
  URLs
• Serves relations as an Object moves through
  supply chain

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Conclusions and Future Work

• Conclusions
• Survey general technology trend related RFID
• Present functions provided to design RFID based
  middleware
• Proposed to the RFID middleware
• Future work
• Apply to industry field
• Storage management
• Control of goods on stock
• Physical distribution management
• Verifies the effectiveness