Summary Information of Mr. Mohammad Yousef Darmani
Name
Mr. Mohammad Yousef Darmani
Affiliation
Khaje Nasir Toosi University of Technology, Tehran, Iran
Topics
Network Performance Studies Network Protocols and Standards
Biography
Nowadays Ad hoc networks are used extensively. In these kinds of networks all the nodes move continuously with no fixed access point and the network topology is variable, therefore one of the most important challenges in these networks is finding the best path from the data source to its destination. Many suggested routing algorithms use the usual link state and distant vector techniques and are divided into two main groups: proactive and on-demand methods.
In proactive methods, as most of the necessary routing information has been sent before main packets, there would be less retardation than the on-demand protocols. As a result these methods suffer from high overhead. ZHLS [1] ?DSDV and FSR are examples of this routines. In on-demand methods we find a path to a destination when there is the necessity for sending a packet to that destination, so there would be fewer overheads but more retardation. We can name DSR [2] and TORA [3] as the most important methods of this group. In General because of having high amount of transition and keeping the links information, topology based methods do not have enough ability to be used for widespread networks. In location based methods which are called geographical methods, there is no need to keep track of the network topology. Nodes can send data packets to the other nodes using their location information. LAR [4] protocol is one of the first methods of these kinds which uses the flooding algorithm by a minor change. The sender node defines a demand zone for sending. When a middle node receives this demand, it forwards the demand to all paths only if they belong to the demand zone. To increase the probability of sending a demand packet to a distance node it should have an expected domain. DSL[5] and SLS[6] use the same method
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