EECS, Peking University

19.05.2009 1

Wireless ECG Healthcare Monitoring System

Bingli Jiao & Yuping Zhaojiaobl@pku.edu.cn

Yuping.zhao@pku.edu.cnWireless & Satellite Communication Lab

EECS, Peking University, China

EECS, Peking University

19.05.2009 2

Outline

BackgroundSystem descriptionsHardware implementationsPerformancesFurther works

EECS, Peking University

19.05.2009 3

Background

The population of orders has increasedDifficult to accommodate all senior citizens in hospitalsNursing homes is preferable healthcare mode for privacy and lower costs Using devices to act as nurses

EECS, Peking University

19.05.2009 4

Background

Technical possibilitydevelopment of wireless communication technologies impact on our life worldwide Wireless Healthcare Monitoring System is possibleTwo types wireless networks can be used

mobile networkwireless local area network (WLAN).

EECS, Peking University

19.05.2009 5

System descriptions

Wireless Healthcare Monitoring System—ECG(Electrocardiogram)

PKU has developed wireless ECG devices – for the heart remote monitoring Internet and software/hardware enable the network for real-time transmissionsTele-medical can be performed at low cost

User centric service with ubiquitous computingTechnology of wireless transmission for quality of medical servicesClassifying and grouping the medical information into the services

EECS, Peking University

19.05.2009 6

wireless monitoring system-Developed by Peking University (PKU)

EECS, Peking University

19.05.2009 7

Wireless transmission systemsWireless LAN (WiFi)Wireless Personal area network (WPAN) -Zigbee

EECS, Peking University

19.05.2009 8

Zigbee description

EECS, Peking University

19.05.2009 9

characteristics of Zigbee2.4GHz and 868/915 MHz dual PHY modesLow power consumption, with battery life ranging from months to yearsMaximum data rates are: 250 kbps (2.4 GHz), 40 kbps (915 MHz), and 20 kbps (868 MHz)High throughput and low latency for low duty-cycle applications (<0.1%)Addressing space of up to 64 bit IEEE address devices, 65,535 networks50m typical rangeDifferent topologies: star, peer-to-peer, mesh

EECS, Peking University

19.05.2009 10

Zigbee Topology

Full Function Device

Reduced Function Device

Communication Flow

PAN Coordinator

PAN Coordinator

Star Topology Peer-to-Peer Topology

EECS, Peking University

19.05.2009 11

data stream in the ECG system

Internet Medical Server

PersonalServer

Location(GPS)

Temperature& Humidity

SpO2

ECG

MotionSensors

MonitorGenerte warningsConfigure NetworkDescribe syptoms

EECS, Peking University

19.05.2009 12

network diagram of the ECG system

home

home

hospital

Home terminal

Home terminal

Hospital terminal

Hospital terminal

Hospital terminal

Access point

Nurse terminal

Server

Normal monitor

SMS Alarm

Data base

Doctor terminal

Data collecting

Data Processing

Monitering

EECS, Peking University

19.05.2009 13

Three generation patient terminalFirst

generation

Using WiFi for wireless data transmission

EECS, Peking University

19.05.2009 14

Three generation patient terminal

Second generation

Using WiFi for wireless data transmission

EECS, Peking University

19.05.2009 15

Three generation patient terminal

Third generation

Using WPAN 802.15.4 for wireless data transmission

EECS, Peking University

19.05.2009 16

System Performances

Working in the 2.4GHz Band200Hz sampling rate for each data packet of 17BytesThe raw ECG data rate for a single user is about 3.4Kbyte/s

EECS, Peking University

19.05.2009 17

System Performances

Both the sensor terminal and the hospital terminal are developed by PKUThe wireless transmission is connected: sensor – Internet - hospitalThe system testing is finished with very good performanceThe software and hardwire are ready for the real product

EECS, Peking University

19.05.2009 18

Interface of patient terminal

EECS, Peking University

19.05.2009 19

Interface of hospital terminal

EECS, Peking University

19.05.2009 20

Future WorksThe experimental results and analysis verified that the system has a friendly user interface and good stability, with great practical potential. The diversification of the system terminal also makes the system applicable to a variety of scenes.

EECS, Peking University

19.05.2009 21

Future WorksTechnical works:

Continue to improve the system in terminal miniaturizationFurther reduce the cost and sizeIncrease the mobility and make more convenience terminal device.Increase system reliability

Application related worksFind a suitable situation for the applicationsMake real testing during the projectFind some industry partners for product devolopment

EECS, Peking University

19.05.2009 22

Suggestions are welcomeTechnical suggestions

To increase the system performancesMedical suggestions

Suggestion from terminal usersSuggestions from hospitals: doctors and nurses

Application suggestionsPractical cases for utilizationsApplication and testing during this joint project

Commercial suggestionThe way of become real products

EECS, Peking University

19.05.2009 23