OppNets Routing Protocols (Contd.)

Spray and wait [12]:
This protocol[12] is an extension to the epidemic routing protocol.
It aims to reduce the overhead of flooding which often causes network congestions and indiscriminate usage of the network resources.
One way of doing so is to only forward a copy with some probability.
The probability is the utility of every node based on the timer indicating the time elapsed since the two nodes last encountered the node maintaining the record. These are indirectly the relative node locations
There are two phases in the forwarding process –
Spray phase – Every message generated is spread randomly to L relay nodes i.e. L copies of message are created.
Wait phase – If the destination is not found in spray phase, the nodes then wait for direct transmission.