WifiConfiguration.Status : Possible status of a network configuration.
WifiInfo : Describes the state of any Wifi connection that is active or is in the process of being set up.
WifiManager : This class provides the primary API for managing all aspects of Wi-Fi connectivity.
WifiManager.WifiLock : Allows an application to keep the Wi-Fi radio awake.
Network support by Android
Provides APIs for utilizing GSM-specific telephony features, such as text/data/PDU SMS messages. more...
GsmCellLocation : Represents the cell location on a GSM phone.
SmsManager : Manages SMS operations such as sending data, text, and pdu SMS messages.
SmsMessage : A Short Message Service message.
Wireless Sensor Networks
What is a Wireless Sensor Network?
Wireless Sensor Node = Sensor + Actuator + ADC + Microprocessor + Powering Unit + Communication Unit (RF Transceiver)
An ad hoc network of self-powered and self-configuring sensor nodes for collectively sensing environmental data and performing data aggregation and actuation functions reliably, efficiently, and accurately .
GPS Sensor Node
Limitations of Wireless Sensors
Wireless sensor nodes have many limitations :
Modest processing power – 8 MHz
Very little storage – a few hundred kilobits
Short communication range – consumes a lot of power
To provide a dependable, non-intrusive, secure, real-time automated health monitoring.
Should be scalable and flexible enough to be used in diverse scenarios from home based monitoring to disaster relief, with minimal customization.
Vision * Sanskrit for long life
To provide a realistic environment (test-bed) for testing communication
protocols and systems for medical applications.
K. Venkatasubramanian, G. Deng, T. Mukherjee, J. Quintero, V Annamalai and S. K. S. Gupta, "Ayushman: A Wireless Sensor Network Based Health Monitoring Infrastructure and Testbed ", In Proc. of IEEE DCOSS June 2005 Environmental Sensors (Temperature etc) Medical Sensors (EKG, BP) controlled By Mica2 motes Body Based Intelligence Home/Ward Based Intelligence External Gateway Central Server Medical Facility Based Intelligence Medical Professional Internet Stargate Gateway
Ayus hman : Current Setup Internet Environmental Data (accelerometer, Temperature, humidity, Light) Blood Pressure Oximeter ZigBee 802.11 Remote Clients Central Server Base Station Body Area Network RS232
Hardware and software based architecture
Real-time, continuous data collection
Query support (past, current data)
Remote monitoring capability through the Internet
Simple alarm generation
Enabling Technologies Commercially available sensor boards Open source OS with support for ad hoc networking + TOS v.1.x-2.0 Ad-hoc Networking Mica2 TelosB Imote2 Mica2Dot Iris MicaZ
Phone to WSN Interface
To minimize the changes to the existing WSN architecture (required to maintain backward compatibility with previous apps.)
To leverage COTS hardware and existing software solutions (to minimize the development time) .