The IARP allows for local route optimization through the removal of redundant routes and the shortening of routes if a route with fewer hops has been detected, as well as bypassing link-failures through multiple local hops, thus leveraging global propagation.
WikiProject Telecommunications may be able to help recruit an expert. In order to further eliminate unnecessary broadcasting, the BRP may implement Selective Bordercasting.
Due to its pro-active nature, local route discovery is very efficient and routes to local destinations are immediately available. In single-channel networks, node E can listen to the traffic and come to the same conclusion using QD2.
Once a zone is confirmed as containing the destination node, the proactive protocol, or stored route-listing table, is used to deliver the packet.
While the idea of zones often seems to imply similarities with cellular phone services, it is important to point out that each node has its own zone, and does not rely on fixed nodes which would be impossible in MANETs. Therefore, it is important for the IARP to provide support for unidirectional links among the local nodes.
Given this knowledge, a node can further eliminate peripheral nodes from its list of bordercast recipients, if the outer peripheral nodes overlap. Thus ZRP reduces the control overhead for longer routes that would be necessary if using proactive routing protocols throughout the entire route, while eliminating the delays for routing within a zone that would be caused by the route-discovery processes of reactive routing protocols.
In ZRP a zone is defined around each node, called the node's k-neighborhood, which consists of all nodes within k hops of the node. In order to adopt a traditional pro-active link state protocol for use as the IARP in the ZRP, the scope of the protocol needs to be limited to the size of the zone.
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