AODV: Improvement on DSDV
n AODV intends to improve on DSDV shortcomings
n basic idea: create routes only “on demand” to eliminate
overhead of periodic broadcasts
n problem: if purely “on demand”, could lead to long
latencies before first packet gets transmitted
n AODV assumes symmetric links between two nodes
n discover new nodes in neighborhood using local hello
messages
n primary objectives of AODV:
broadcast discovery packets only when necessary
distinguish between local connectivity changes and general
topological maintenance
disseminate information about local changes only to those
neighboring mobiles that are likely to need information