01-12-2012, 05:38 PM
Wireless Sensor Network
[attachment=42149]
Why Talk About Wireless?
Wireless communication is not a new technology but cell phones have brought revolution in wireless communication
Wireless Technology has changed the way
Organizations & individuals work & live today
In less than 10 years
World has moved from fixed to wireless networks
Allowing people, mobile devices & computers talk to each other, connect without a cable
Only available option for field data acquisition
Interconnectivity with multiple devices
Using radio-waves, sometimes light
Frees user from many constrains of traditional computer & phone system
Ubiquitous Computing
Future State of Computing Technology?
Mobile, many computers
Small Processors
Low Power Consumption
Relatively Low Cost
Growth in Wireless Systems
Rapid growth in cellular voice services
Cell phones everywhere!
Several wireless technology options have been available for the last ~10-20 yrs
mini cell stations using existing standards like CDMA or GSM
wireless PABX using PCS standards such as DECT or PHS/PACS
satellite and microwave backhaul
Above solutions OK for voice & low-speed data, but do not meet emerging needs for broadband access and mobile data
Mobile Computing
Identify/develop mobile computing solutions and effector systems integrated with existing wireless infrastructure
Improve health care via enhanced training and more effective decision making
To maximize the amount of medical data available for health surveillance
Mobile Healthcare Technologies
Mobile Healthcare can be regarded as the integration of technologies of medical sensors, mobile computing, and wireless communications into a system of medical assistance.
Potential Benefits
Increasing the physician productivity and efficiency.
Wireless sensors enable the patients’ freedom of movements and therefore promote new ways of monitoring the patient.
Providing clinicians remote access to patient’s information eliminates the need to manually locate and search through patient’s data.
Enabling telemonitoring in emergency scenarios and making remote diagnosis possible.
Typical Demo System
The patient is provided with a wearable wireless sensor. The signal from the sensor is captured in a Node situated in a mobile phone.
The system allows ubiquitous access to patient’s data and medical information in real-time via the mobile phone.
The medical data is stored & processed in a server, and can be used for establishing diagnostics and treatments.
Wireless Technology
Emerging mainstream wireless technologies provide powerful building blocks for next-generation applications
WLAN (IEEE 802.11 “WiFi”) hot-spots for broadband access, Bluetooth
PDAs and laptops with integrated WLANs
Broadband Wireless access technology- MAN (Alternative to DSL)
IEEE 802.16 10-30 Km 40 Mbps WiMax
Wide area wireless data also growing
SMS, GPRS, Edge, CDMA2000 1xEV-DO (2.4 Mbps data optimized)
Variety of interesting devices (e.g. Treo, Sidekick)
Networking of embedded devices
Smart spaces, sensor networks (IEEE 802.15.4a- ZigBee)
Context-aware mobile data services and web caching for information services
Wireless sensor nets for monitoring and control
VOIP for integrated voice services over wireless data networks
Security
Challenges in ad hoc network security
The nodes are constantly mobile
The protocols implemented are co-operative in nature
There is a lack of a fixed infrastructure to collect audit data
No clear distinction between normalcy and anomaly in ad hoc networks
Secure the Routing Mechanism
A mechanism that satisfies security attributes like authentication, confidentiality, non-repudiation and integrity
Secure the Key Management Scheme
Robust key certification and key distribution mechanism
[attachment=42149]
Why Talk About Wireless?
Wireless communication is not a new technology but cell phones have brought revolution in wireless communication
Wireless Technology has changed the way
Organizations & individuals work & live today
In less than 10 years
World has moved from fixed to wireless networks
Allowing people, mobile devices & computers talk to each other, connect without a cable
Only available option for field data acquisition
Interconnectivity with multiple devices
Using radio-waves, sometimes light
Frees user from many constrains of traditional computer & phone system
Ubiquitous Computing
Future State of Computing Technology?
Mobile, many computers
Small Processors
Low Power Consumption
Relatively Low Cost
Growth in Wireless Systems
Rapid growth in cellular voice services
Cell phones everywhere!
Several wireless technology options have been available for the last ~10-20 yrs
mini cell stations using existing standards like CDMA or GSM
wireless PABX using PCS standards such as DECT or PHS/PACS
satellite and microwave backhaul
Above solutions OK for voice & low-speed data, but do not meet emerging needs for broadband access and mobile data
Mobile Computing
Identify/develop mobile computing solutions and effector systems integrated with existing wireless infrastructure
Improve health care via enhanced training and more effective decision making
To maximize the amount of medical data available for health surveillance
Mobile Healthcare Technologies
Mobile Healthcare can be regarded as the integration of technologies of medical sensors, mobile computing, and wireless communications into a system of medical assistance.
Potential Benefits
Increasing the physician productivity and efficiency.
Wireless sensors enable the patients’ freedom of movements and therefore promote new ways of monitoring the patient.
Providing clinicians remote access to patient’s information eliminates the need to manually locate and search through patient’s data.
Enabling telemonitoring in emergency scenarios and making remote diagnosis possible.
Typical Demo System
The patient is provided with a wearable wireless sensor. The signal from the sensor is captured in a Node situated in a mobile phone.
The system allows ubiquitous access to patient’s data and medical information in real-time via the mobile phone.
The medical data is stored & processed in a server, and can be used for establishing diagnostics and treatments.
Wireless Technology
Emerging mainstream wireless technologies provide powerful building blocks for next-generation applications
WLAN (IEEE 802.11 “WiFi”) hot-spots for broadband access, Bluetooth
PDAs and laptops with integrated WLANs
Broadband Wireless access technology- MAN (Alternative to DSL)
IEEE 802.16 10-30 Km 40 Mbps WiMax
Wide area wireless data also growing
SMS, GPRS, Edge, CDMA2000 1xEV-DO (2.4 Mbps data optimized)
Variety of interesting devices (e.g. Treo, Sidekick)
Networking of embedded devices
Smart spaces, sensor networks (IEEE 802.15.4a- ZigBee)
Context-aware mobile data services and web caching for information services
Wireless sensor nets for monitoring and control
VOIP for integrated voice services over wireless data networks
Security
Challenges in ad hoc network security
The nodes are constantly mobile
The protocols implemented are co-operative in nature
There is a lack of a fixed infrastructure to collect audit data
No clear distinction between normalcy and anomaly in ad hoc networks
Secure the Routing Mechanism
A mechanism that satisfies security attributes like authentication, confidentiality, non-repudiation and integrity
Secure the Key Management Scheme
Robust key certification and key distribution mechanism