Data Replication in Mobile Ad Hoc Networks
OVERVIEW Abstract Existing System Proposed System overview of proposed system Brief description of proposed
system Requirements
ABSTRACT
In a mobile ad hoc network, data replication drastically
improves data availability. However, since mobile hosts’ mobility
causes frequent network partitioning, consistency management
of data operations on replicas becomes a crucial issue. In such an
environment, the global consistency of data operations on
replicas is not desirable by many applications. Thus, new
consistency maintenance based on local conditions such as
location and time need to be investigated. This paper attempts to
classify different consistency levels according to requirements
from applications and provides protocols to realize them. We
report simulation results to investigate the characteristics of
these consistency protocols in a mobile ad hoc network.
EXISTING SYSTEM
In mobile ad hoc network (MANET) mobile hosts
move freely, due to the free moving disconnections often occur.
This causes data in to two separated networks, so data become
inaccessible to each other. Preventing the fall of data
availability at the point of network partitioning is a very
significant issue in MANETs. Replicas of a data item become
invalid after the host holding the original updates it and the
consistency of data operations on replicas is kept in the entire
network. To overcome the disadvantages of the existing system
we can develop the proposed system.
PROPOSED SYSTEM
To improve data availability, data replication is
the most promising solution. So we can develop different
consistency conditions of data operations on replicas in
MANETs and we can we propose protocols to achieve them
and also discuss the impact of replica allocation for the
system performance when the memory space of mobile
hosts is limited. We also report simulation results to
investigate the behavior of the proposed protocols. We can
also plot the graph by using the Execution time and Speed up
factor to analyze the performance of our proposed system
MODULES:
Determining the Device's Location. Location dependent data in
consideration of network partition. Finding the nearest server. Managing Data Replication. Traffic Analysis.
Determining the Device's Location: In this age of significant telecommunications
competition, mobile network operators continuously seek new and innovative ways to create differentiation and increase profits. One of the best ways to do accomplish this is through the delivery of highly personalized services. One of the most powerful ways to personalize mobile services is based on location.
One of the most obvious technologies behind device location is positioning, with the most widely recognized system being the Global Positioning System (GPS). These other technologies are network based positioning and typically rely on various means of triangulation of the signal from cell sites serving a mobile phone. In addition, the serving cell site can be used as a fix for location of the user
Location dependent data in consideration of network partition: Location dependent data services
are offered by some cell phone networks as a way to send custom advertising and other information to cell-phone subscribers based on their current location. The cell-phone service provider gets the location from a GPS chip built into the phone based on the signal-strength of the closest cell-phone towers.
Finding the nearest server: If the service provider is busy when
some requests are send by the user it cannot be able to handle the request of the sender. So there is some delay in the services. To avoid the delay in the service it finds the nearest service provider which with less services, and transfer the request to that service provider. By this process we can provide the service with in the expected time.
Managing Data Replication:
A mobile ad-hoc network (MANET) is a collection of wireless autonomous nodes without any fixed backbone infrastructure. All the nodes in MANET are mobile and power restricted so, disconnection and network partitioning occurs frequently. a data replication technique for real-time ad-hoc mobile databases (DREAM) is proposed that addresses all those issues.
It improves data accessibility while considering the issue of energy limitation by replicating hot data items at servers that have higher remaining power. It addresses disconnection and network partitioning by introducing new data and transaction types and by considering the stability of wireless link. It handles the real-time transaction issue by replicating data items that are accessed frequently by firm transactions before those accessed frequently by soft transactions.
Traffic Analysis: In this module we can take an analysis
about the traffic, and how the service providers handle the traffic in an efficient way. By using this analysis result we can plot a graph to investigate the behavior of the proposed system rather than the existing system. We plot the graph by using the Execution time and Speed up factor to analyze the performance of our proposed system.
Determining Device's Location
Location Dependent Data in Consideration of Network Partition
Finding the nearest server
Managing data replication
Traffic Analysis
Overview of proposed system
The main contributions of this paper are not only the
proposal of the consistency levels and protocols but
1) the classification of consistency levels according to the system and application requirements
2) the choices of the existing techniques and their extensions for design of the protocols of these consistency levels in MANETs, and
3) performance studies of these protocols.
Brief Description of the proposed system
SOFTWARE REQUIREMENTS
Operating System : Win NT.
Programming Package : JAVA SDK : JDK.1.5.0Database : MySQL
HARDWARE SPECIFICATION
Processor : Intel Dual Core 1.6 GHz.Ram : 512 MB DDR-2.HDD : 80 GBS.Monitor : View sonic 17” Tft.Network Card : On Board.Mother Board : Intel 945g Original.