Hariswaroop Gangwar | University of Pune (original) (raw)

Papers by Hariswaroop Gangwar

Mobile Ad Hoc Networks (MANETs) is a wireless network with high of mobility, no fixed infrastru... more Mobile Ad Hoc Networks (MANETs) is a wireless
network with high of mobility, no fixed
infrastructure and no central administration. So it
make MANET more vulnerable to attack. These
MANETs are deployed in different situations such
as emergency search and rescue operations,
military, etc. So in ad hoc, all nodes act as router
and behave independently, hence cooperation
within nodes is must. In order to enforce the
cooperations between the nodes in the system,
many trust scheme have been proposed. To build
trust relationship depends on some factor- context,
behaviour and experiences. And it is more
challenging to calculate accurately. So optimization
can be accomplished by considering those context-
aware metrics which measure MANET
performance. Context-aware metrics could include
mobility awareness, energy awareness, power
awareness, availability, contention awareness, and
congestion awareness. Including such metrics in the
invented protocols should help to improve MANET
performance.

In this paper, we have used Dempster-Shafer theory
to reach our goal of attaining trust by considering
context - packet delivery ratio and energy loss in
transmission Evaluation result shows that our
scheme perform well to find malicious node and
isolate from the MANETs.

The internet has created the foundation for a networked economy-an extended business community in... more The internet has created the foundation for a
networked economy-an extended business community in
which vendors, partners, and customer interact and
collaborate. Web Services are self–contained, self –describing,
modular applications that can be published, located, and
invoked across the web. One of the most important and
promising advantages of Web service technology is the
possibility of combining and linking existing services to create
new web processes according to the given requirement. We
shall present the motivation for web services Composition.
Web Service is a software component invoked over the Web
via an XML message that follows the Simple object Access
Protocol (SOAP), which is a simple XML based protocol to let
applications exchange information over HTTP and to
transport the messages using open protocols standard. Web
Services are based on distributed technology and provide
standard means of interoperating between different software
applications across and within organizational boundaries with
the use of XML. Web services are provided with different
Quality of Service (QOS) so they should be selected
dynamically on composition. Optimized selection is achieved
by minimizing a certain objective function. According to study
of objective function, it should always be based on user
requirements. We will introduce four types of objective
function styles. Sometimes a single service given alone does
not meet user’s needs. In this case, it is necessary to compose
several services in order to achieve the user’s goal. This
proposal discusses the Quality of Service (QOS) aware
composition of web services. The work is based on the
assumption that for each task in a workflow a set of
alternative Web services with similar functionality is available
and these web services have different QOS parameters and
costs. This leads to the general optimization problem of how to
select web services for each task so that the overall QOS and
cost requirements of each composition are satisfied. Serviceoriented architecture (SOA) provides a scalable and flexible
framework for service composition. Service composition
algorithms play an important role in selecting services from
different providers to reach desirable QOS levels according to
the performance requirements of composite services, and
improve customer satisfaction.

The internet has created the foundation for a networked economy-an extended business community in... more The internet has created the foundation for a networked economy-an extended business community in which vendors, partners, and customer interact and collaborate. Web Services are self-contained, self -describing, modular applications that can be published, located, and invoked across the web. One of the most important and promising advantages of Web service technology is the possibility of combining and linking existing services to create new web processes according to the given requirement. We shall present the motivation for web services Composition. Web Service is a software component invoked over the Web via an XML message that follows the Simple object Access Protocol (SOAP), which is a simple XML based protocol to let applications exchange information over HTTP and to transport the messages using open protocols standard. Web Services are based on distributed technology and provide standard means of interoperating between different software applications across and within organizational boundaries with the use of XML. Web services are provided with different Quality of Service (QOS) so they should be selected dynamically on composition. Optimized selection is achieved by minimizing a certain objective function. According to study of objective function, it should always be based on user requirements. We will introduce four types of objective function styles. Sometimes a single service given alone does not meet user's needs. In this case, it is necessary to compose several services in order to achieve the user's goal. This proposal discusses the Quality of Service (QOS) aware composition of web services. The work is based on the assumption that for each task in a workflow a set of alternative Web services with similar functionality is available and these web services have different QOS parameters and costs. This leads to the general optimization problem of how to select web services for each task so that the overall QOS and cost requirements of each composition are satisfied. Serviceoriented architecture (SOA) provides a scalable and flexible framework for service composition. Service composition algorithms play an important role in selecting services from different providers to reach desirable QoS levels according to the performance requirements of composite services, and improve customer satisfaction.