28-02-2011, 03:08 PM
presented by:
Deepika Agrawal
Animesh Kar
WiSeNet.ppt (Size: 794 KB / Downloads: 110)
Wireless Sensor Network (WiSeNet)
Introduction
A large number of low cost, low power, multifunctional, and small sensor nodes.
Sensor nodes consist of sensing, data processing and communicating components
Collaborative effort of a large number of nodes.
Primarily focus on power consumption.
The difference between sensor network and ad hoc network
Sensor nodes:
Number of sensor nodes is larger
Densely deployed, prone to failures
The topology of a sensor network changes very frequently
Mainly use broadcast
Limited in power
No global identification
Sensor network communication architecture
Data Aggregation - A technique used to solve the implosion and overlap problems in data-centric routing
Data coming from multiple sensor nodes with the same attribute of phenomenon are aggregated
The sensor nodes are usually scattered in a sensor field
Sensor nodes can collect data and route data back to sink
The sink may communicate with the task manager node via Internet or Satellite
Factors influencing sensor network design
Hardware constraints
Scalability
Production costs
Fault tolerance
Sensor network topology
Environment
Transmission media
Power consumption
Hardware constraint
Four basic hardware components:
Sensing unit
Processing unit
Transceiver unit
Power unit
Fault Tolerance
Fault tolerance is the ability to sustain sensor network functionalities without any interruption due to sensor node failures
The protocols may be designed to address the level of fault tolerance
Deepika Agrawal
Animesh Kar
WiSeNet.ppt (Size: 794 KB / Downloads: 110)
Wireless Sensor Network (WiSeNet)
Introduction
A large number of low cost, low power, multifunctional, and small sensor nodes.
Sensor nodes consist of sensing, data processing and communicating components
Collaborative effort of a large number of nodes.
Primarily focus on power consumption.
The difference between sensor network and ad hoc network
Sensor nodes:
Number of sensor nodes is larger
Densely deployed, prone to failures
The topology of a sensor network changes very frequently
Mainly use broadcast
Limited in power
No global identification
Sensor network communication architecture
Data Aggregation - A technique used to solve the implosion and overlap problems in data-centric routing
Data coming from multiple sensor nodes with the same attribute of phenomenon are aggregated
The sensor nodes are usually scattered in a sensor field
Sensor nodes can collect data and route data back to sink
The sink may communicate with the task manager node via Internet or Satellite
Factors influencing sensor network design
Hardware constraints
Scalability
Production costs
Fault tolerance
Sensor network topology
Environment
Transmission media
Power consumption
Hardware constraint
Four basic hardware components:
Sensing unit
Processing unit
Transceiver unit
Power unit
Fault Tolerance
Fault tolerance is the ability to sustain sensor network functionalities without any interruption due to sensor node failures
The protocols may be designed to address the level of fault tolerance