PRESENTED BY:
Y.ABHILASH

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MOBILE AD HOC NETWORKS
VRCE
MANET means
. MOBILE
RANDOM AND PERHAPS CONSTANTLY CHANGING
. AD-HOC
NOT ENGINEERED
.NETWORKS
ELASTIC DATA APPLICATIONS WHICH USE NETWORKS TO COMMUNICATE
BASIC IDEA
. A MOBILE AD-HOC NETWORK IS A COLLECTION OF MOBILE DEVICES EQUIPPED WITH A TRANSMITTER AND RECEIVER CONNECT IN THE ABSENCE OF FIXED
INFRASTRUCTURE.
. IT IS A SELF CONFIGURING NETWORK OF MOBILE ROUTERS CONNECTED BY WIRELESS LINKS . HENCE IT IS A ARBITRARY TOPOLOGY.
. THIS NETWORK MAY OPERATE IN STAND ALONE FASHION OR MAY BE CONNECTED
TO LARGE INTERNET.
THE IMPORTANT ROLE THAT A MANET PLAYSIN FUTURE NETWORKS (4G)
LOW COST AND HIGHER EFFICIENCY
1. AS IT HAS NO FIXED INFRASTRUCTURE HENCE WE DON’T HAVE BUILD OUT
COST AND MAINTENANCE COST.
2. WE CAN ACESS HIGH SPEED APPLICATIONS EVEN WHEN THERE IS NO FIXED
INFRASTRUCTURE
PROVIDING NETWORK TO RURAL AREAS
MANET IS GAINING MOMENTUM BECAUSE THEY HELP REALIZING NETWORKS
NETWORK SERVICES FOR MOBILE USER IN AREA WITH NO PRE –EXISTING
INFRASTUCTURE.
. SPONTANEOUS NETWORKING
WHEN A GROUP OF PEOPLE COME TOGETHER FOR A COMPUTER BASED COLLABORATIVE WORK
CHARACTERISTICS
AUTONOMOUS AND INFRASTRUCTURE-LESS
MULTI HOP ROUTING
DYNAMICALLY CHANGING TOPOLOGIES
. VARIATION LINK AND NETWORK CAPABILITIES
APPLICATIONS
MILITARY APPLICATIONS
DISASTER RECOVERY ENVIROMMENTS
TRAFFIC NETWORKS
CHALLENGES FOR MANET
ENERGY CONSTRAINED OPERATION
FAULT DETECTION IS DIFFICULT
PACKET LOSS
HETEROGINITY
SECURITY
ROUTING
ROUTING
TABLE DRIVEN ROUTING PROTOCOL
ON DEMAND ROUTING PROTOCOL
HYBRID ROUTING PROTOCOL
Table Driven Routing Protocol
Proactive.
Each node maintains one or more tables
containing routing information to every other
node in the network.
Tables need to be consistent and up-to-date
view of the network.
Updates propagate through the network
On demand routing protocol
Reactive.
on-demand style: create routes only when it is desired by the source node
When a node requires a route to a destination,
it initiates a route discovery process
Route is maintained until destination becomes unreachable, or source no longer is interested
in destination.
Zone Routing Protocol
Hybrid of table-driven and on-demand!!
From each node, there is a concept of “zone”.
Within each zone, the routing is performed in a
table-driven manner (proactive).
However, a node does not try to keep global
routing information.
For inter-zone routing, on-demand routing is used.