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Wireless networks can be categorized into infrastructure and infrastructure-less based on the network formation and architecture. Mobile Ad-hoc Networks are infrastructure-less networks with self-configuring property having a dynamic topology where nodes are free to move in any direction, due to this topological changes there are increased chances of link breaks in the network giving rise to path...
Many of the models used to analyze the performance of wireless networks assume stationary traffic behaviors where the average state-changing event times are constant. Various analysis of real traffic traces have shown that such behaviors in mobile wireless networks vary periodically during the day and night. Other systems also exhibit a similar behavior. A better analysis of the network's performance...
Wireless Ad hoc Networks are rapidly growing in popularity because of their flexibility and wide range of applications (Indoor Communications, Intelligent Transportation, Emergency Operations, Public Safety, etc.). However, while it becomes easier to set up such networks, one of the main constraints is the heterogeneity of the nearby devices (or nodes). Moreover, it is still very difficult to make...
This paper proposes a next generation ubiquitous converged infrastructure to support Cloud and mobile Cloud computing services. The proposed infrastructure facilitates interconnection of fixed and mobile end users with IT resources through a heterogeneous network integrating optical metro and wireless access networks. To support the Infrastructure as a Service paradigm, the proposed architecture adopts...
With the ongoing growth of mobile Internet usage numbers and the continuous deployment of additional mobile network nodes, the power consumption in mobile networks is increasing at dramatic rates leading to a huge amount of carbon emissions. Therefore, improving energy efficiency in mobile radio networks is of increasing relevance. The reduction of energy consumption in mobile radio networks can be...
An efficient authenticating mobile user protocol for wireless communications was proposed in this paper. The most important feature of our proposed protocol has the property of authenticating mobile user. In this scheme, the mobile stations must be authenticated by visit network. We use the pre-computing, unbalanced technique in which mobile stations have far less computational and communication requirements...
Mobile business can only be used within the coverage area of the wireless networks at present. If there is some temporary utilization such as emergency business in disaster area and some conferences or link failure, the users cannot receive M-business services. Owing to the infrastructureless structure and self-organized feature of 4G system, this paper proposes 4G-based mobile business model supported...
The rapid spread of wireless mobile devices and the advances of wireless communication have fueled the interest about streaming 3D graphics on mobile devices to be used in augmented reality based classes of applications. In these types of applications, a real world is mapped into the virtual world and thin mobile devices are employed to navigate in the virtual simulated environment (VE). In evidence,...
With the development of wireless communications and mobile computing technology, information science and technology brings the great impact on all aspects of life. Nowadays with the rapid development of the electronic government (E-Government) and the widespread use of mobile technologies (M-Technologies), such as mobile phones, PDAs (Personal Digital Assistants) and laptops to connect to wireless...
Wireless networking is the preferred method for establishing new computer networks, more and more organizations and users are switching over to wireless communication because of its benefits such as flexibility and portability, increased productivity and low installation cost over wired networks. Therefore there are a growing number of regulatory requirements for the security of confidential data,...
Inter-vehicular communication is an important research area that is rapidly growing due to considerable advances in mobile and wireless communication technologies, as well as the growth of microprocessing capabilities inside today's cars, and other moving vehicles. A good amount of research has been done to exploit the different services that can be provided to enhance the safety and comfort of the...
Nowadays, users of mobile phones generate too many files that have to be frequently downloaded to an external storage repository, restricting the user mobility. This paper presents a File Transfer Service (FTS) for mobile phones with scare storage resources. It is a support that can be used through a set of functions (API) that facilitates file transfer between mobile applications and external storage...
With the advances of wireless communication and mobile computing, there is a growing interest among researchers about augmented reality and streaming 3D graphics on mobile devices for training first responders to be better prepared in a case of disaster scenarios. However, several challenges need to be resolved before this technology become a commodity. One of the major difficulties in 3D streaming...
Mobility of users carrying mobile devices with access to wireless networks creates the need to provide uniform and immediate access to information. In this scenario, a new educational model, called Ubiquitous Learning, has been studied. In this model, the educational processes are related to the learner's situation, i.e. they are context-aware. This allows the access to educational resources be adapted...
In wireless ad-hoc networks, there are several characteristics different with wired networks. The differences are changing of network topology, limited resources like bandwidth and energy and so on. In these days as the energy issue becomes more important, it is required to research about the efficient resource allocation methods optimized in wireless networks. In the paper, we improve LAR (Location-Aided...
In the near future, a pervasive computing environment can be expected to be based on the recent progresses and advances in computing and communication technologies. The Next generation (Next-Gen) of mobile communications will include both prestigious infrastructured wireless networks and novel infrastructureless Mobile Adhoc NETworks (MANETs). The special features of MANET bring great opportunities...
The following topics are dealt with: mobility; quality of service; measure based and classification mechanism; clusters, grids, and distributed systems; processors and input/output systems; data security; multimedia communications; protocols; wireless networks; computer applications; real time systems; and voice over IP.
Delay tolerant networking (DTN) is a new store-and-forward architecture and protocol suite for the networks which is intermittent connectivity. Depending on the nodes ability of store and forward, the messages are delivered to their destination with the proper choice of routing protocol by nodes' mobility. In order to successful delivery, many routing protocols use multiply copies methods. Although...
The mobile internet services are not as ??the Internet on your phone??, specific algorithms should been designed and implemented so that they adapt to the devices, mobile/wireless networks and mobile operators, and match the user profiles to the diversity of contents structures. Personalization appears to be the most appropriate solution to this need. It comes into aid by creating personalized portals...
In this paper, we consider the design of caching infrastructure to enhance the client-perceived performance of mobile wireless clients retrieving multimedia objects from the Internet. We consider three primary issues: location of the cache, size of the cache, and management policy for the cache. We consider both infrastructure-oriented caching at the Access Point (AP), as well as peer-assisted caching...
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