Hetrogenous wireless sensor network
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Transcript of Hetrogenous wireless sensor network
HETEROGENEOUS WIRELESS SENSOR NETWORK
GANDHI INSTITUTE FOR TECHNOLOGY
Guided by:Prof.Subhransu sekhar panda
Chinmoy kanta jena Chinmaya singh Krushna chandra sahoo Jyotiprakash mishra Kamalakanta behera
Team members
OBJECTIVE
To analyze the efficiency of heterogeneous wireless sensor network over homogenous wireless sensor network.
To analyze the stability, life time ,through put.
WIRELESS SENSOR NETWORK
A Wireless Sensor Network (WSN) consists of distributed autonomous wireless sensors nodes to monitor physical or environmental conditions, such as temperature, humidity, light intensity, sound, vibration, pressure, motion etc.
Each node having sensing area of few meters and radio range approximately 10 to 15 meters.
BLOCK DIAGRAM
WIRELESS SENSOR NETWORK …cntd. WSN is a self organized or spontaneous network.
Each node can sense, compute and communicate each other. They can either receive message or transmit message and can transmit messages to the sink (or Base Station).
The sink can use many ways to communicate with remote network, such as Internet, satellite and mobile communication network.
Finally, the Task Manager (User) collects this transmitted data.
BLOCK DIAGRAM OF A SENSOR NODE
Transceiver
Sensor 1
Power Source
Micro-controller
MemorySensor 2
ADC
Few Sensing inputs:1. Temperature
2. Humidity3. Light Intensity4. Sound5. Vibration6. Pressure
7. Motion .
ROUTING
CLUSTERING ALGORITHM
Construction phase1. Each node tests whether to become CH
or not.2. If node becomes CH then it sends
cluster advertisement and waits for response3. If node decides not to be CH then
listens for CH advertisements and responses to the
closest CH
CLUSTERING ALGORITHM (Cont…)
Maintenance phase1. When cluster is established, CH
sends/transmits data in schedule.2. After certain time the cluster is
disrupted and new construction phase takes place (rotation of CH) where new CH are elected
SELECTING CLUSTER-HEADS IN LEACH Node i chooses random number s between 0
and 1 If s < T(i), node i becomes a cluster head in
current round where: T(i)= where: P = desired percentage of cluster heads r=no. of round
CH SELECTION CRITERIA
Cluster head are selected according to Initial Energy Residual Energy Energy Consumption Rate Average Energy of the Network:
CLUSTER NODE MAINTENANCE
Sensing field
LEACH ASSUMPTION
Synchronized network Base station is fixed and located far
from the sensors All nodes are homogeneous and energy
constrained All nodes can reach base station
LEACH PROPERTIES
Distributed Only local information CH role Data aggregation from node Forwards aggregated data to BS Inter-cluster communication via CH Simple
IN A HOMOGENEOUS ENVIRONMENT…
When all nodes start with the same energy level nodes “randomly” die and within a short period
The result of initial setting or evolution of the sensor network’s operation :“advanced” node has a “α” times more energy than “normal” nodeThe energy of each advanced node is E0(1+α) .
BUT IN A HETEROGENEOUS ENVIRONMENT…
A. Military fields.B. Medical monitoring and Health
care.C. Industrial Control.D. Ocean and wildlife monitoring.E. Building safety.F. Earthquake Early Warning and
Monitoring.G. Environmental applications.H. Intelligent green aircrafts.I. Smart Roads.
APPLICATION DOMAINS OF WSNS
PERFORMANCE MEASURES Stability Period: Time until death of the first
node Network lifetime: Time until death of the last
alive node Number of cluster-heads per round: Nodes
which will directly send aggregated information to the sink
Throughput: Rate of data reporting to cluster-heads and to sink
Thank you