Evaluation of Table Driven Protocols-DSDV & OLSR in MANET

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IJSRD - International Journal for Scientific Research & Development| Vol. 2, Issue 07, 2014 | ISSN (online): 2321-0613

Evaluation of Table Driven Protocols-DSDV & OLSR in MANET Sanju Verma1 Professor Sandeep Jaglan2 1 M.Tech Student 2Associate professor 1,2 Department of Computer engineering 1,2 NCCE, Israna, Panipat Abstract— Ad-hoc networks are wireless networks where nodes communicate with each other using multi-hop links. There is no stationary infrastructure or base station for communication. In the infrastructure network base stations are fixed. A MANET is a type of Ad-hoc network that can change locations and configure itself on the fly. Routing in Ad-hoc-networks has been a challenging task ever since the wireless networks came into existence. A number of protocols have been developed for accomplish this task. The objective of the proposed work is to study the Table driven(Proactive) Protocols- DSDV and OLSR protocol performance on the basis of Cumulative sum of no. of all generated packets, Throughput of dropping packets, Packet Size Vs. Average throughput of sending packets, Packet Size Vs. Average throughput of receiving packets, Throughput of receiving bits Vs. Maximal Simulation processing time. Output results are compared using network simulator-2(NS2) between DSDV and OLSR. Keywords: Proactive, DSDV, OLSR, MPR, Throughput, Maximal Simulation Time

selected nodes, called MPRs, to retransmit control messages. This technique significantly reduces the number of retransmissions required to flood a message to all nodes in the network. Secondly, OLSR requires only partial link state to be flooded in order to provide shortest path routes. The minimal set of link state information required is, that all nodes, selected as MPRs, must declare the links to their MPR selectors. II. SIMULATED INFORMATION

I. INTRODUCTION DSDV protocol is proactive protocol and enhanced version of Bellman ford algorithm and DSDV keeps the simplicity of Bellman Ford algorithm, avoid looping problem and remain compatible in cases where a base station is available. And idea behind the DSDV is to modify the Bellman ford algorithm. DSDV adds two things to distance-vector routing.  Sequence number; avoid loops  Damping; hold advertisements for changes of short duration. The tables are updated either using a "full dump" or an incremental update. A full dump send the full routing table to the neighbors and could span many packets whereas in an incremental update only those entries from the routing table are sent that has a metric change since the last update and it must fit in a packet. The route information broadcast by each node contain  Its new Sequence Number  Each route  The Destination’s address  The number of hops required to reach the destination  The Destination Sequence Number.

Fig. 1: Simulated Information of DSDV Protocol

Each row of the update send is of the following form: 

<Destination IP address, Destination sequence number, Hop count> In OLSR, only nodes, selected as such MPRs, are responsible for forwarding control traffic, intended for diffusion into the entire network. MPRs provide an efficient mechanism for flooding control traffic by reducing the number of transmissions required. OLSR minimizes the overhead from flooding of control traffic by using only

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