Body Area Network: Introduction of Research on a New Generation Tele-health at NICT
2010/11/30 Kiyoshi Hamaguchi (hamaguti@nict.go.jp) Medical ICT Group New Generation Wireless Research Center
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T i Topics
?Background g of research ?Wireless Body Area Network (BAN) ?Activity of Medical ICT research at NICT ? Overview of UbiquitousHome project at NICT ?Concluding remarks
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Background of Research
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Social Problem: Population Aging
Percentage of total population aged 60 years or older (2002) European countries as well as Japan are facing aging problem
https://www.doczj.com/doc/645448873.html,/esa/population/publications/ageing/Graph.pdf
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Increasing Healthcare Cost in Japan
% of total population aged 60 years or older % of health care cost to GDP
1996 1998 2000 2002 2010
15.1 % 16.0 % 17.2 % 18.4 % 22.4 % (estimate)
7.37 % 7.88 %
Aging
8.02 % 8.58 % ???
Increasing
Source: Ministry of Health, Labor and Welfare in Japan
? If number of hospital visit is reduced to that of 40 %, around 1.6 million US dollars medical expense would be saved in Japan ? How reduce number of visit ? ? Well-known “Wireless sensor network” technology in ICT field ? One possibility: Medical/Healthcare system using Wireless Sensor Network
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A Solution: Telemedicine using Wireless Sensor Network on Human Body
Electrocardiogram Cellular, WiMAX, Satellite, etc Vital sensor Data transmission to healthcare centre Coordinator
Motion measurement
?To collect vital information wirelessly for use of health check and rehabilitation ?Over 24-hours all-day checking is available by wearing sensor NW anytime and anywhere ?When fatal alert is detected during vital monitoring, an ambulance, family and/or policeman could come to the patient automatically 6
Wireless Body Area Network (BAN)
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What are features of Wireless Body Area Network ?
BAN ?A wireless i l sensor networking t ki t h l technology optimized for low power devices and operation p on, in or around human body y
?Features: (a) Wireless coverage: around 2-3 meters, corresponds to body size (b) High reliability and secure communications, to protect personal information (c) Specific absorption rate (SAR) should be considered to lower thermal influence to body (d) Low power consumption, for long battery use Wireless, ,
Source: IEEE802.15.6
Networking, g, Low-power
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What can we know by using multiple sensors ?
- A new potential for health measurement -
Heart beat using electrocardiograph
Pulsation measurement for blood vessel τ Time difference (τ) between two peaks concerns vessel condition by principle of hydrodynamics y y e.g., harder vessel: smaller time difference Point: precise synchronization between BAN nodes
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BAN Applications
(II) Assistance to people with disabilities ? Blind person ? Speech disability ? Artificial hands, legs (III) Body interaction and entertainment ? Wireless headphone ? Wireless game
BAN Applications pp
(I) Health Care Service ? Medical check check-up ? Physical rehabilitation applications ? Physiological Ph siological monitoring
Ref. Doc.: IEEE802-15-06-0241-00-0ban
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A Vital Sensing Application
? Body temperature sensor ? Electroencephalogram (EEG) – Brain waves ? Electrocardiogram ec oc d og (ECG) ( CG) – electrical activity of heart ? Motion sensor – motion of b h and breath d body b d ? Blood pressure sensor （BP） ? Artery At pulse l sensor （CP） etc…
EEG
BP
ECG Aggregate FFD CP PAN/LAN
Ref. Doc.: IEEE802-15-06-0241-00-0ban, presented by NICT
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Other Application Examples
Remote control of medical devices Fitness monitoring
Insulin pump Pacing information etc.
Wearable audio and video
Collaborative function
Disability assistance
Muscle tension sensing and stimulation
Implantable sensor
https://www.doczj.com/doc/645448873.html,
Animal applications
Health monitor and infectious disease 12 control in early phase, e.g. bird flu
Activity of Medical ICT Group
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Medical ICT Project in NICT
? NICT established Medical ICT Project in 2006FY to promote R&D and standardization for Medical ICT ? Currently NICT is coordinating Medical ICT Consortium (15 C Companies, i 3U Universities i iti and d NICT) t to make k successful f l business models and to promote R&D by collaborating with industrial and academic partners
TSUMURA RESEARCH LAB
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Research Subject
Analysis of radio wave propagation around/in human body New wireless (PHY/MAC and FEC) scheme for high link quality, low power consumption, high interference immunity etc Current our main research Data processing (mining) scheme for vital data Optimization of total networking including BAN, other wireless and wired connections
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Experimental Study 1
?Development for wireless BAN to examine core technologies such as propagation modeling, g small antenna, new PHY/MAC and FEC etc.
Chirp-based PHY
ZigBee-based PHY
IR-UWB-based PHY
Development of a small antenna for BAN and propagation measurement using body-fantom
Experimental developments of BAN regarding several PHYs
?Surface-absorption-ratio (SAR) evaluation for human hazard and propagation modeling using FDTD method and actual human-body
IEEE802.15.4 MAC evaluation on a software tool “MIRAI-SF”
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Experimental Study 2
?Coexistence test between medical equipment i t and dd developed l d wireless i l system
?Electro-magnetic El t ti environmental i t l measurement at operating room
?Experiment using internet-satellite (WINDS) connecting to BAN for evaluation of future possible ubiquitous medical network
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Experimental Study 3
e b a f h d c
l g i j
1 Cl Classified ifi d i into t 7 poses 2 Distance and angle between any two positions 3 Estimation for link quality distribution using measured data
k
Static measurement
Dynamic measurement
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Pendant Type Wireless BAN Pendant-Type
4 Functions: electrocardiogram, motion (body pose) sensor, body temperature and emergency button
9Electrocardiogram and body temperature to check heart condition 9Motion sensor; detection of stumbling for elderly people 9Emergency button to call family family, doctor and/or ambulance 9Incorporated NICT’s low-computational complexity data-processing technology
LED Emergency button
USB Type USB-Type BAN coordinator Wireless BAN
Cellular p phone
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D Developed l d UWB-BAN UWB BAN f for Vi Vital lS Sensing i
Pendant-type electroペンダント型 cardiograph g p
Wrist 腕時計型 watch-type SpO2
West equipped ベルト装着型 motion sensor
固定型 Wireless weight measurement
?BAN using high-band UWB (7.25～10.25 GHz) ?Capability of large number of UWB equipment using high capacity of UWB ?Sleep mode at receiver for long battery life
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