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Associated based
routing [ABR]:
ABR is an efficient on-demand or source initiated routing protocol. In ABR, the
destination node decides the best route, using node associativity. ABR is
suitable for small networks, as it provides fast route discovery and creates
shortest paths through associativity. Each node keeps track of associativity
information by sending messages periodically.
If the associativity value is
more means nodes mobility is less.
If the associativity value is
less means nodes mobility is
In ABR the source which wants to
send the packet to the destination will create a query packet and broadcast in
the network. Query packet generation is required for discovering the route.
The broadcast continues as long
as destination is reached once the destination is reached it creates the reply
packet and sends back to the source.
The query packet will have the
following information.
1. Source id
2. Destination id
3. All intermediate node id
4. Sequence number
5. CRC and
6. Time to live [TTL]
A node sends an update packet to
the neighbors and waits for the reply if update is received back, then
associative tick will be incremented high then it means mobile device is still
a part of the network otherwise it might not be.
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