27-08-2013, 03:06 PM
WIRELESS INTEGRATED NETWORK SENSORS
WIRELESS INTEGRATED.pptx (Size: 996.02 KB / Downloads: 36)
PHYSICAL PRINCIPLES
PROPAGATION LAWS FOR SENSING
(Free space & other media)
DETECTION & ESTIMATION:
(Camer- Rao theory)
USE OF PRACTICAL ALGOS:
Deconvolution
Target separation
COMMUNICATION CONSTRAINTS:
Spatial separation
Multipath path propagation
WINS Network Architecture
Characteristics
Support large numbers of sensor
Low average bit rate communication ( < 1-100 Kbps )
Dense sensor distributions
Exploit the short-distance separation multihop communication
Time-division protocol
Exchange small messages: performance information, synchronization,
bandwidth reservation requests
Abundant bandwidth few conflicts, simple mechanisms
At least one low-power protocol suite has been developed feasible to achieve distributed low-power operation in a flat multihop network
Why WINS ?
Low power consumption ( 100 μW average )
Separation of real-time from higher level functions
Hierarchical signal-processing architecture
Application specific
Communication facility ( WINS gateways )
Remote user
Scalable
Reduce amount of data to be send scalability to thousands of nodes per gateway