Distributed cache updating for dynamic source routing protocol Local sex hookups no cc
When it has data packets to be sent to that destination, it initiates a Route Request packet.This Route Request is flooded throughout the network.Dynamic Source Routing (DSR) is a routing protocol for wireless mesh networks.It is similar to AODV in that it forms a route on-demand when a transmitting node requests one.The major difference between this and the other on-demand routing protocols is that it is beacon-less and hence does not require periodic hello packet (beacon) transmissions, which are used by a node to inform its neighbors of its presence.The basic approach of this protocol (and all other on-demand routing protocols) during the route construction phase is to establish a route by flooding Route Request packets in the network.Each node, upon receiving a Route Request packet, rebroadcasts the packet to its neighbors if it has not forwarded it already, provided that the node is not the destination node and that the packet’s time to live (TTL) counter has not been exceeded.
The intermediate nodes also utilize the route cache information efficiently to reduce the control overhead.
The accumulated path information is cached by nodes processing the route discovery packets. To accomplish source routing, the routed packets contain the address of each device the packet will traverse.
This may result in high overhead for long paths or large addresses, like IPv6.
This route cache is also used during the route construction phase.
This protocol uses a reactive approach which eliminates the need to periodically flood the network with table update messages which are required in a table-driven approach.A destination node, after receiving the first Route Request packet, replies to the source node through the reverse path the Route Request packet had traversed.