SINGLE NODE ARCHITECTURE Hardware components of a sensor node.pptx
- 2. Embedded controllers are small, specialized computers that are integrated into sensor nodes. They collect data from sensors, processing the data, and communicate with other nodes in the network. These controllers are designed to be very efficient to save energy.
- 5. These scenarios vary widely based on the requirements of the application, the characteristics of the environment, and the objectives of the sensor network deployment. ◦ Types of sources and sinks ◦ Single-hop and multi-hop networks ◦ Multiple sinks and sources ◦ Three types of mobility
- 6. Several typical interaction patterns found in WSNs – event detection, periodic measurements, function approximation and edge detection, or tracking. Sources: Any node that provides data / measurements or the actual nodes that sense data. Nodes where information is generated. Sinks: Nodes where information is required. These sinks sometimes are part of the sensor network itself. Sometimes outside the network (Ex: The firefighter’s PDA communicating with a WSN) Is part of an external network (Ex: Internet), somehow connected to the WSN The sink is not interested in the detection of parameters like source node; In sink data itself is much more important.
- 8. The inherent power limitation of radio communication follows a limitation on the feasible distance between a sender and a receiver. Because of this limited distance, the direct communication between source and sink is not always possible, specifically in WSNs, which are intended to cover a lot of area / ground (Ex: In environmental or agriculture applications) or that operate in difficult radio environments with strong attenuation (Ex: In buildings). To overcome limited communication distances in Wireless Sensor Networks (WSNs), relay stations can be used
- 9. In many cases, there are multiple sources and/or multiple sinks present. In the most challenging case, multiple sources should send information to multiple sinks, where either all or some of the information has to reach all or some of the sinks.
- 11. Node mobility Sink mobility Event mobility