Routing protocols in ad hoc networks are categorized in two groups: Proactive (Table Driven) and Reactive (On-Demand) routing.

Proactive (Table Driven) Routing Protocol

These routing protocols are similar to and come as a natural extension of those for the wired networks. In proactive routing, each node has one or more tables that contain the latest information of the routes to any node in the network. Each row has the next hop for reaching a node/subnet and the cost of this route.

Various table-driven protocols differ in the way the information about a change in topology is propagated through all nodes in the network.

Reactive (On Demand) Routing Protocol

Reactive routing is also known as on-demand routing. These protocols take a lazy approach to routing. They do not maintain or constantly update their route tables with the latest route topology.

Examples of reactive routing protocols are the dynamic source routing ad hoc on-demand distance vector routing (AODV) and temporally ordered routing algorithm.

Our power-aware source routing algorithm belongs to this category of routing algorithms. Since our approach is an enhancement over DSR, a brief description of DSR is warranted. DSR is one of the more generally accepted reactive routing protocols. In DSR, when a node wishes to establish a route, it issues a route request (RREQ) to all of its neighbours. Each neighbour broadcasts this RREQ, adding its own address in the header of the packet.

Representative APR 391%

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