MOBILE AD HOC NETWORKS

Interconnected collection of wireless nodes
•Nodes enter and leave over time
•Nodes also act as routers; forward packets
•No pre-established network infrastructure
•No centralized administration
•Communication using BlueTooth and WAP

Characteristics Of MANETs

• Dynamic Topologiesand node memberships
• Host movement frequent
• Topology change frequent
• Data must be routed via intermediate nodes
• Bandwidth constraints
• Many Transmission Errors
• Energy-constrained operation

Why Ad Hoc Networks?

•Setting up of fixed access points and backbone infrastructure is not always viable

–Infrastructure may not be present in a disaster area or war zone

–Infrastructure may not be practical for short-range radios; Bluetooth (range ~ 10m)

•Ad hoc networks:

–Do not need backbone infrastructure support

–Are easy to deploy

–Useful when infrastructure is absent, destroyed or impractical