This document summarizes the implementation of LEACH (Low Energy Adaptive Clustering Hierarchy), a routing protocol for wireless sensor networks, in the NetSim network simulator. LEACH is a cross-layer protocol that uses dynamic clustering to select cluster heads in order to minimize energy consumption and extend network lifetime. Sensor nodes transmit data to their cluster heads, which then pass the data to the sink node. The document describes how NetSim implements LEACH using static routes between cluster heads and the sink node, and how network-in and network-out events are handled to route packets to their destinations.

1. LEACH
NetSim Implementation
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2. LEACH
 Stands for Low Energy Adaptive Clustering
Hierarchy.
 Simple Routing Protocol in WSN(Wireless Sensor
Network)
 MAC Protocol Integrated with Clustering
# LEACH is a cross layer protocol.

3. LEACH (CONTD)
 Goal:
Low Energy Consumption required to create and
maintain clusters in order to improve lifetime

4. LEACH (SCENARIO)

5. SINK NODE
 Primary Controller in WSN
 Initiate, terminate and route communication around
the network

6. CLUSTER HEAD
 Cluster Head:
From each Cluster, one sensor is elected as Cluster
Head, which
- Collects Data from surrounding
sensors in that cluster.
-Passes that data to the Base Station or
the next Cluster Head.
 LEACH uses Dynamic Clustering Method i.e job of
Cluster Head changes after some time.

9. IMPLEMENTATION IN NETSIM
 Node  Cluster Head  Sink Node
 Static Routes have been defined
CH1  CH3
SINK NODE
CH2  CH4

11. IMPLEMENTATION IN NETSIM(CONTD)
 If Network-out Event
 Device ID == Source ID -the Next hop=CH of cluster
 Device ID != Source ID -Next hop = Static route mentioned
 If Network-In Event
 Device ID == Destination ID -accept the packet for higher layer
 Device ID != Destination ID -Generates Network-out event
and perform above steps

12. THANK YOU