Mobile e-Health with HL7 CAS 757 Modern Software Technology for eHealth Term 2, Winter 2010 Dr. Kamran Sartipi Jianhui (Jeffrey) Lei Yao (Aaron) Song
Agenda • Wireless Concepts and Technologies • Mobile e-Health Service • Mobile e-Health Technology and HL7 for Medical Information Management • Mobile e-Health System • Mobile e-Health with MacSeie
Wireless Concepts and Technologies
Wireless Technology Development • Wireless technology is already an integral part of everyday life. • Consumer demand is driving the development and evolution for wireless technology. • This phenomenon is similar to the evolution of PCs throughout the 1980s.
Wireless Devices • Cell Phone • Personal Digital Assistant (PDA) • Laptop • Radio-Frequency Identification (RFID) • Any other specific devices without wire, i.e. medical sensors
OSI Reference Model
Communication of Networked Computers through OSI Model
Important Standards at Various OSI Layers
Issues To Be Considered • How far can a signal travel? • At what speed can information be transferred? • What are the known obstacles? • Potential security issues
Wireless Technology in Medical Environment • Wireless devices are widely used in health providers and patients. • WLAN (Wireless Local Area Network) deployment in medical environment is a cheap and effective way to provide high- speed, reliable connectivity.
Wireless Technology in Medical Environment What wireless technology can bring for medical service? • Remote access and update Electronic Medical Record (EMR) system at the point of care, allow the health providers and patients to view, query and edit all information in real time. • Utilization of voice-over-WLAN that provide immediate voice communications.
Wireless Standards Change Fast • Meet customers’ desires • Remain consistent with newer technology designed to be compatible with prior generations. • Compatibility means less disadvantage of discovering a new technology’s shortcomings.
Two Wireless Communication Standards • IEEE (Institute of Electrical and Electronics Engineers) 802.11 family, also known by the brand name Wi-Fi for wireless computer networking • Global System for Mobile Communications (GSM) and 3rd Generation (3G) for cellular communications standard
Wi-Fi • A registered trademark, controlled and published by the Wi-Fi Alliance. • Permitted only on equipment which has passed testing. • The purpose of certification testing covers compatibility, security, quality of service, power save aspects.
Wireless Computer Local Area Network
Comparison of 802.11 a/b/g
Bluetooth • Bluetooth is a proprietary open wireless protocol for exchanging data over short distances (using short length radio waves) from fixed and mobile devices, creating Personal Area Networks (PANs). • Range: 1m – 100m • Data Rate: 1 Mbit/s (Version 1.2 ); 3 Mbit/s (Version 2.0 )
RFID • Radio-Frequency Identification (RFID) is a generic term for technologies that use radio waves to automatically identify objects. • Two components: a tag and a reader. • RFID bracelet, payment by mobile phones.
Cellular Network
TDMA • Time Division Multiple Access (TDMA) is the standard of Global System for Mobile Communications (GSM), Which is known as 2G. • TDMA is a channel access method for shared medium networks. It allows several users to share the same frequency channel by dividing the signal into different time slots.
CDMA • Code Division Multiple Access is the standard of 3rd Generation (3G). • CDMA allows several users to share a bandwidth of different frequencies. • CDMA employs spread-spectrum technology and a special coding scheme (where each transmitter is assigned a code) to allow multiple users to be multiplexed over the same physical channel.
FDMA • Frequency Division Multiple Access (FDMA) is a channel access method used in multiple-access protocols as a channelization protocol. • FDMA gives users an individual allocation of one or several frequency bands, or channels.
OFDMA • Orthogonal Frequency-Division Multiple Access (OFDMA) is a multi-user version of the popular orthogonal frequency division multiplexing digital modulation scheme. • Used in 802.16 standard, commonly referred to as Worldwide Interoperability for Microwave Access (WiMAX). • Higher sensitivity to frequency offsets and phase noise.
Overview of 3G Standards
Voice-over-WLAN
Review of Cellular and Computer Networks Cellular Computer Network Network Mobile Communications operator GSM: TDMA Standard: 802.11 Family 3G: CDMA 802.11a/b/g (802.11e/h, 802.1x, MAC, • Mapping between phone number and IP address WEP, WPA are sub- • Transforming message format protocols providing some • Protocol: SIP specific features for 802.11a/b/g)
Mobile e-Health Service
Mobile e-Health Service • Apply software programming and computer network technologies to provide Electronic Healthcare Service e-Health service • Apply mobile communication technologies to provide Mobile e-Health Service m-Health service
Mobile e-Health Technology and HL7 for Medical Information Management
Mobile e-Health Technology and HL7 for Medical Information Management Background and Motivation • Fragmentation of patient information increases over a period of time • Managing medical information becomes more complicated • The need to access patient information grows with the need to consolidate the patient information across healthcare systems
Mobile e-Health Technology and HL7 for Medical Information Management • Modern Medical Information Management • Ontology-based Multi-Agent System • Electronic Medical Agent System (eMAGS)
Mobile e-Health Technology and HL7 for Medical Information Management Modern Medical Information Management • Integrity • Consolidates patient information across various health management entities • Interoperability • Provides public sharing mechanisms over consolidated information across heterogeneous data sources
Mobile e-Health Technology and HL7 for Medical Information Management Goals • Integrity • Interoperability Solutions • Federated database approach • XML-based integration • CORBA • Ontology-based Multi-Agent System
Mobile e-Health Technology and HL7 for Medical Information Management Ontology • In computer science and information science, an ontology is a formal representation of the knowledge by a set of concepts within a domain and the relationships between those concepts. (Wikipedia)
Mobile e-Health Technology and HL7 for Medical Information Management Mobile Agent • In computer science, a mobile agent is a composition of computer software and data which is able to migrate (move) from one computer to another autonomously and continue its execution on the destination computer. (Wikipedia)
Mobile e-Health Technology and HL7 for Medical Information Management What could Ontology and Mobile Agent provide us? Ontology • To provide interoperability among heterogeneous data sources in medical information systems Mobile Agent • To access, decipher, learn and exploit medical information on various health systems
Mobile e-Health Technology and HL7 for Medical Information Management Ontology Ontology-based Multi-Agent System Mobile Agent
Mobile e-Health Technology and HL7 for Medical Information Management Ontology-based Multi-Agent System • Provides a framework for interactions in a distributed medical systems environment (Integrity) • Allows access to patient information across multiple databases (Interoperability) • Without the limitations of the traditional client-server approach
Mobile e-Health Technology and HL7 for Medical Information Management Ontology-based Multi-Agent System Database Client Results DB Query Agent Agent Served By Served By Agent Broker Client DB Query Database Workstation
Mobile e-Health Technology and HL7 for Medical Information Management Mobile Agent Ontology HL7 HL7 Ontology-based Multi-Agent System Electronic Medical Agent System (eMAGS)
Mobile e-Health Technology and HL7 for Medical Information Management Electronic Medical Agent System (eMAGS) • Multiple co-operating Mobile Agents • Ontology based on HL7 Reference Information Model (HL7-RIM) • Provides translations between local data and the HL7 format
Mobile e-Health Technology and HL7 for Medical Information Management
Mobile e-Health Technology and HL7 for Medical Information Management eMAGS – Architecture • Agent Server • Database Application • HL7 Message and HL7 Agent • Agent Broker • Ontology Server
Mobile e-Health Technology and HL7 for Medical Information Management eMAGS – Architecture (Cont’d) • Ontology Server • HL7 Message Template Library (HL7MLib) • Ontology based on HL7-RIM (HL7RIMLib) • Data Mapping Library (DMLib) • Query Agent (Ontology Server Query Agent – OSQA) • User Interface Agent (Ontology Process Manager Agent – OPMA)
Mobile e-Health Technology and HL7 for Medical Information Management
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