3-body area networks (ban)
DESCRIPTION
Body Area Networks (BAN)TRANSCRIPT
doc.: IEEE 802.15-06-0331
Submission
Slide 1
BAN (Body area networks)
DefinitionUsage scenarios
By. P. Victer Paul
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doc.: IEEE 802.15-06-0331
Submission
What is BAN ?
A Body Area Network is formally defined by IEEE 802.15 as, "a communication standard optimized for low power devices and operation on, in or around the human body to serve a variety of applications including medical, consumer electronics / personal entertainment
Slide 3
doc.: IEEE 802.15-06-0331
Submission
A WBAN consists of multiple sensor nodes
Each capable of sampling, processing, and communicating one or more vital signs (heart rate, blood pressure, oxygen saturation, activity) or environmental parameters (location, temperature, humidity,light).
Typically, these sensors are placed strategically on the human body or hidden in users’ clothes allowing ubiquitous health monitoring
Slide 4
doc.: IEEE 802.15-06-0331
Submission
Slide 5
Body Area Networks –Target PositionAverage power consumption, sustained data rate
1000 mW500 mW100 mW 50 mW 10 mW
1 Gbit/s
100 kbit/s
1 Mbit/s
10 Mbit/s
100 Mbit/s
1 kbit/s
10 kbit/s
Wireless USB
IEEE 802.11 a/b/g
Bluetooth
ZigBee
200 mW 20 mW
Body Are
a Netw
ork
5 mW 2 mW
doc.: IEEE 802.15-06-0331
Submission
Usage Scenarios
• Body senor network• Fitness monitoring• Wearable audio• Mobile device centric• Video stream• Remote control & I/O devices
Slide 6
doc.: IEEE 802.15-06-0331
Submission
Slide 7
Body Sensor Network
• Medical application– Vital patient data– Wireless sensors– Link with bedside monitor– Count on 10 – 20 sensors
• Five similar networks in range• Minimum setup interaction• Potentially wide application• Total traffic / patient < 10 kbps
doc.: IEEE 802.15-06-0331
Submission
Body sensor networks
Wireless sensor technology for health monitoring applications called Body Sensor Network.
BSN is a rich interdisciplinary area which revolutionizes the health care system by allowing inexpensive, continuous health monitoring with real-time updates of medical records via Internet
Slide 8
doc.: IEEE 802.15-06-0331
Submission
Slide 9
Fitness Monitoring
• Central device is MP3 player• Wireless headset included• Expand functionality
– Speed, distance– Heart rate, respiration monitor– Temperature sensor– Pacing information– Location information– Wristwatch display unit– Etc.
• Total system load < 500 kbps• Synchronization may go faster
doc.: IEEE 802.15-06-0331
Submission
Slide 10
Wearable Audio
• Central device is headset• Stereo audio, microphone• Connected devices
– Cellular phone– MP3 player, PDA– CD audio player– AP at home– Handsfree car– Remote control– Others
• Requires priority mechanism• Network load < 500 kbps
doc.: IEEE 802.15-06-0331
Submission
Slide 11
Mobile Device Centric
• Mobile terminal is central point• Covers broad set of data
– Sensors – vital, other– Headset– Peripheral devices– Handsfree / car
• Provide gateway to outside– Offload sensor data, other
• Requires priority mechanism• Network load < 500 kbps
doc.: IEEE 802.15-06-0331
Submission
July 2006
Stefan Drude, PhilipsSlide 13
Remote Control & I/O Devices
• Remote control device• Increase consumer convenience• Makes headset control practical• Stand-alone vs shared function• Combine with wristwatch display ?
• Printers• Identification, storage• Wireless pen
• Complement BAN functionality
doc.: IEEE 802.15-06-0331
Submission
July 2006
Stefan Drude, PhilipsSlide 14
Technical Requirements
• There is no specific standard for BANs– Current standards come close for specific use
cases, not broad enough– Issues: power consumption, discovery, QoS– Support for very low power devices, sensors
• Target less than 10% power consumption for communications compared to total device
• Have single standard with broad range of supported data rate - scalability
doc.: IEEE 802.15-06-0331
Submission
July 2006
Stefan Drude, PhilipsSlide 15
BAN Requirements - Draft
• Distance 2 m std, 5 m special• Piconet density 2 - 4 nets / m2 • Devices per network max. 100• Net network throughput 100 Mbit/s max.• Power consumption ~ 1mW / Mbps
(@ 1 m distance)
• Startup time < 100 us, or< 10% of TX slot
• Latency (end to end) 10 ms • Network setup time < 1 sec
(after initial setup, per device)
doc.: IEEE 802.15-06-0331
Submission
July 2006
Stefan Drude, PhilipsSlide 16
BAN Requirements - Draft
• Implementation module cost• Should be comparable to Bluetooth module
• Effective sleep mode(s)
• Concept for effective, remote wake-up
• Operates in global, license-exempt band
doc.: IEEE 802.15-06-0331
Submission
July 2006
Stefan Drude, PhilipsSlide 17
BAN Requirements - Draft
• Privacy, security• Peer to peer communication, point to multi-
point• Omni-directional antennas: small, flexible• Future proof [for 5 years?]
– Upgradeable, scaleable, backwards compatibility
• Support for several power management / consumption schemes [classes]
doc.: IEEE 802.15-06-0331
Submission
July 2006
Stefan Drude, PhilipsSlide 18
BAN Requirements - Draft
• Quality of service, guaranteed bandwidth– Specific definitions, depends on application
• Graceful degradation of services– Depends on application, not always desireable
• Concurrent availability of asynchronous and isochronous channels
• Low duty cycle and high duty cycle modes• Very low duty cycle applications (sensors)
doc.: IEEE 802.15-06-0331
Submission
July 2006
Stefan Drude, PhilipsSlide 19
Interest Group on BAN in 802.15 (2)Conclusions on low data rate applications
• Support different classes of QoS for high reliability, asymmetric traffic, power constrained
• Needs optimized, low complexity MAC and Networking layer
• High number of simultaneously operating piconets required
• Application specific, security/privacy required• Small form factor for the whole radio, antenna, power
supply system• Locating radios (” find me”) mode