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Ubiquitous Computing
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Ubiquitous computing
Recent advances in embedded systems and mobile technologies are paving the way for the next revolution in computing, Ubiquitous Computing, the future towards which all the current technological developments are heading. The technology trends across the globe are pointing in this direction to make intelligent devices, all pervasive, and effectively invisible to the user. Ubiquitous computing has potential applications in several sectors such as healthcare, business processes disaster mitigation and management, farm land irrigation, and empowering the common man to improve the quality of life. With the increasing penetration of mobile communication and Internet, India does offer a great market for ubiquitous computing and its proliferation.
As the field of communication networks continues to evolve, a very interesting and challenging area of Wireless Sensor Networks (WSN) is rapidly coming of age. Wireless sensor networks are attractive means to monitor environmental conditions and to bridge the gap between the physical and the digital world. Wireless Sensor Networks are highly distributed networks of small, lightweight wireless nodes deployed in large numbers in-situ to monitor the environment or a system. The nodes cooperate and collaborate on their data, which leads to accurate sensing of events in the environment.

We are developing wireless sensor networks based on zigbee as part of this project. Zigbee is low data rate, low power protocol communication protocol based on IEEE 802.15.4 MAC and PHY standards. The maximum supported by zigbee based sensors are up to 100 meters. Range can be extended using multiple nodes using multi hop routing.

The major deliverables of the project are

  • Design and Development of wireless sensor node
  • Design of hardware IP core for IEEE 802.15.4 MAC
  • Design and development of Zigbee IP core
  • Design of hardware IP core for UWB based on ECMA standard 368
  • Design of SOC IP core with ARM processor and MAC IP cores developed as part of the project.

The specifications of the sensor nodes developed are as follows

C-DAC wireless sensor node


  • IEEE 802.15.4 PAN compatible
  • Uses industry standard TI CC2430 SOC based device
  • In built temperature and humidity sensor
  • Sensor Interface through three expansion connectors
  • USB interface for node configuration, management and application development
  • Single PCB with integrated RF and Power supply section
  • External SMA antenna for better range
  • PAN Coordinator and router capability
  • 250 kbps data rate
  • Industry compliant Zigbee stack with TI’s native APIs.
  • Supports Mesh routing
  • Location engine for location identification with respect to a fixed node
  • Multi year battery life, 2 x AAA battery
  • Node dimensions: 80 mm x 45mm


  • Industrial and home automation
  • Large scale sensor networks
  • Acoustic, vibration and other high speed sensor data

For more details Email: ubicom@cdacb.ernet.in

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