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Friday, 2 February 2018

Route Reservation in Ad Hoc Wireless Networks

Route Reservation in Ad Hoc Wireless Networks



INTRODUCTION
The two principal switching techniques used in wired networks are circuit switching and packet switching. One of the main differences between them is the way resources are shared. Circuit switching provides exclusive access to the resources by means of reservation. In packet switching, on the other hand, resources are shared on demand, without prior reservation. While it is obvious that packet switching is suitable for a wired data network such as the Internet, it is not clear whether this is true in the case of ad hoc wireless networks.
To the best of our knowledge, a direct study and comparison between these two switching schemes for wireless ad hoc and sensor networks has not been reported in the literature so far. In this paper, we investigate the performance of two switching paradigms: reservation-based (RB) and non-reservation-based (NRB) switching. The concepts of reservation and non-reservation are analogous to those of circuit switching and packet switching in wired networks, respectively.
System Analysis
Existing System:
In an NRB (Non Reservation Based) scheme, an intermediate node can simultaneously serve as relay for more than one source. Hence, the resources (in terms of relaying nodes) are shared in an on-demand fashion. This is typical for most of the routing protocols for wireless ad hoc networks proposed in the literature
Proposed System:
In an RB (Reservation Based) scheme, a source first reserves a multi-hop route to its destination, i.e., it reserves intermediate nodes before the actual transmission begins. The reserved intermediate nodes are required to relay only the message generated by the specific source. This gives the source an exclusive access to the path to the destination.
In addition to posing the interesting question of whether and when RB switching makes sense in wireless ad hoc networks, in this paper, we develop novel analytical models (queuing models) for analyzing the network performance (in terms of throughput, delay, goodput, and maximum tolerable speed) under the RB and NRB switching schemes. Although some simplifying assumptions are made to keep the analysis tractable, the results presented in this paper still provide significant insights and may stimulate further research in this area.
One of the important contributions of this work is to identify under which conditions (in terms of route discovery, MAC protocol, pipelining, etc.) the delay performance of the RB scheme can be superior to the NRB scheme. While the conventional wisdom in current wireless ad hoc networking research favors NRB switching, in this paper, we show, for the first time, when and under which conditions RB switching might be preferable. Our results show that, even under these somewhat strict and futuristic conditions, while RB switching provides a better delay performance, NRB switching can generally achieve higher network goodput and throughput. It is important to understand that if these conditions are not satisfied, then NRB switching will probably be preferable.
MODULES
  • Non Reservation Based Routing
  • Reservation Based Routing
  • Comparison Chart
Non Reservation Based Routing
In this module, here we transferring the file from source to destination through intermediate node, after transmission we are going to find route path for corresponding destination and the transfer the file to the destination, then calculate the delay
Reservation Based Routing
In this module, we are going to transfer the same file from source to destination through intermediate node, before transmission we going give route request to all the node and find the corresponding route path for all the node and store it into database, then transfer the file from source to destination through the corresponding route path present in a table and calculate the delay
Comparison Chart
In this module, going to show performance chart for two different types of routing and this will prove reservation based is better performance than non-reservation based routing
Hardware Interface
·         Hard disk                               :                                   40 GB
·         RAM                                        :                                   512 MB
·         Processor Speed                :                                   3.00GHz
·         Processor                              :                                   Pentium IV Processor
Software Interface
·         JDK 1.5
·         Swing Builder
·         MS-SQL Server

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