Temporarly Order Routing Algorism

Zagazig University Faculty of Engineering Computer & System Dept. Fourth Year

By Sara Mohammed Mohammed Mohammed Ouf BN. 7

Under supervision of Dr. Nesreen Zeidan

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Temporally ordered routing algorithm
TORA

In Wireless put away Networks or Mobile ad-hoc networks the devices (representing bosss ) is movable so its routing table changes eer Due to invitees instability this needs a special routing algorithm Algorithms should be simple and distributed Self-stabilizing (or self-healing) in the face of failures TORA have these features so it is efficient for these applications.

This algorithm is of the family of link retrogression routing algorithms

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These algorithms deals with order acyclic represent (DAG) ie: any two nodes are related with directed think but the graph shouldnt terminate with the same node it began with. If the link is directed towards the node so it is an upstream ( incoming) link. distributively node in the graph has a height . This sentiment is similar to fluid break away All the fluid is to flow from the source to the destination.



The source is at the highest level, the destination is at the terminal level and the fluid flows from the highest level to the lowest level. Thus, if an intermediate node has all inbound links, it is a local minimum and it is contingent that all the the fluid flows to this node rather than the destination. Now, the node has to subjoin its level If the link is directed out of the node so it is an downstream (outbound) link. There are two types of link reversal routing algorithms. ?Full Reversal if any anode (except the destination) only have inbound links it reverses all its links ?Partial Reversal if a link between two nodes i , j has turn cased that node j has only inbound links it reverses the other links only.

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