Distributed cache updating for the dynamic source routing protocol ppt No cridet free asian sex cam
When using source routing, each packet to be routed carries in its header the complete, ordered list of nodes through which the packet must pass. A key advantage of source routing is that intermediate hops do not need to maintain routing information in order to route the packets they receive, since the packets themselves already contain all of the necessary routing information. When it goes out of range of one base station, it connects with new base station and starts communicating through it. All nodes of these networks behave as routers and take part in discovery and maintenance of routes to other nodes in the network.Ad hoc networks are very useful in emergency search-and-rescue operations, meetings or conventions in which persons wish to quickly share information, and data acquisition operations in inhospitable terrain [Royer99].In conventional approach only the nodes involved in the routing path knows about the route error and those node only update their cache.But in U-DSR, by following distributed cache replacement algorithm, source node broadcasts the route error information of size 60 bytes to all its neighbours.
This protocol is truly based on source routing whereby all the routing information is maintained (continually updated) at mobile nodes.It has only two major phases, which are Route Discovery and Route Maintenance.Route Reply would only be generated if the message has reached the intended destination node (route record which is initially contained in Route Request would be inserted into the Route Reply).Wireless networks can be classified in two types:- infrastructured network and infrastructureless (ad hoc) networks.Infrastructured network consists of a network with fixed and wired gateways.