26-03-2011, 10:37 AM
Presented by:
Bandari Prashanthi
WiSeNet.ppt (Size: 568.5 KB / Downloads: 184)
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
Scalability
The number of sensor nodes may be in the order of hundreds or thousands
The node density depends on the application in which the sensor nodes are deployed
Production costs
Since the sensor networks consist of a large number of sensor nodes, the cost of a single node is very important
The cost of a sensor node should be much less than 1$
Sensor network topology
Sheer numbers of inaccessible and unattended sensor nodes make topology maintenance a challenge
Topology maintenance:
Pre-deployment
Post-deployment
Mobility
Energy depletion or destruction
Networking
Multi-Hop Routing
Limited Transmission Range
Routing Issues:
Irregular Topologies
Data Transport Aware
Power Aware
Fault Tolerant
Bandari Prashanthi
WiSeNet.ppt (Size: 568.5 KB / Downloads: 184)
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
Scalability
The number of sensor nodes may be in the order of hundreds or thousands
The node density depends on the application in which the sensor nodes are deployed
Production costs
Since the sensor networks consist of a large number of sensor nodes, the cost of a single node is very important
The cost of a sensor node should be much less than 1$
Sensor network topology
Sheer numbers of inaccessible and unattended sensor nodes make topology maintenance a challenge
Topology maintenance:
Pre-deployment
Post-deployment
Mobility
Energy depletion or destruction
Networking
Multi-Hop Routing
Limited Transmission Range
Routing Issues:
Irregular Topologies
Data Transport Aware
Power Aware
Fault Tolerant