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Mobile devices with two network interfaces(WiFi and 3G) are already commercially available. Point-to-point communications such as Infrared and Bluetooth are also readily used. In the near future, mobile phones will have several interfaces including satellite and new technologies such as Ultra wideband. Hence we must assume that such devices will be multi-homed by default. For various reasons, including...
Study on human mobility is gaining increasing attention from the research community with its multiple applications to use in mobile networks, particularly for the purpose of message delivery in the Delay Tolerant Networks. To understand the potential of mobile nodes better as message relays, our study investigates the encounter pattern of mobile devices. Specifically, we examine the extensive network...
Multimedia streaming applications have disruptively occupied bandwidth in wire line Internet, yet today's fledging mobile media streaming still poses many challenges in efficient content distribution due to the form of mobile devices. At the same time, cloud computing is gaining power as a promising technology to transform IT industry and many eminent enterprises are developing their own cloud infrastructures...
This paper proposes a service-oriented second language learning framework for mobile users. The rapid development of Web 2.0 techniques and the progress of mobile communication networks have made it possible for mobile users to learn second languages at anywhere and anytime by exploiting online resources instead of traditional solitary learning environment. Based on this framework, mobile learners...
This paper presents Byte-Map, which is a novel mobile map format for mobile map service in mobile devices. Byte-Map is a kind of vector format with different blocks through different levels, and map data of Byte-Map is encapsulated in binary stream. The basic cell of Byte-Map is a block, which is fixed in size of 255 units*255 units according to different coordinates systems and thus the coordinates...
Nowadays service creation and consumption is an ordinary, everyday task. Although services are commonly associated to a server -in a fixed machine on the Web- at present services may also be offered from portable devices (i.e., PDAs, smartphones, etc.). Both service provider's and users' mobility requires a highly dynamic service usage, thus bringing about the necessity to develop and use services...
The rapid introduction of new mobile data services presents many challenges to wireless service providers. Unlike voice services, whose traffic characteristics are well understood, new data services are far more volatile and their demand on network resources is harder to predict. Data volumes are exploding and impacting not only the ability of the network to support such traffic but are also driving...
The wireless network evolution has allowed that the handset technology provides a broad and new set of applications to their users. Several of these applications require DBMS solutions that support their operations. Note, however, that these solutions must respect the limitations of the mobile platform, such as smaller memory capacity and lower processing power. This paper discusses our experience...
Mobile publishing promoted several industries development, which included cultural and creative industry, telecommunication industry, software vendors and hardware vendors. Mobile publishing completely depended on the mobile network. However, mobile network are based on an unreliable radio transmission, round-trip-delay and uneasily predictable costs for mobile usage. Consumers wanted to reduce costs...
The preservation of temporal dependencies at runtime among continuous media for mobile distributed systems (MDS) is a key issue for emerging mobile applications, such as medical signal monitoring and interactive multiuser games. The preservation of temporal dependencies among continuous media and simultaneous mobile distributed sources is an open research problem. This paper proposes a temporal synchronization...
The development in mobile devices and wireless technologies opens up unlimited choices of mobile services such as mobile commerce. These advances make access services available and convenient everywhere at any time. Since mobile users usually move, accessing services becomes unavailable especially in some locations that are not covered by their home networks. Therefore, it becomes necessary to roam...
Presence systems are widely used today to get information of user availability and their willingness to communicate. As presence and Unified Communications (UC) services are viewed as productivity enhancements within enterprises, the need to connect these services across enterprise WANs and MANs becomes more important. Adding to the availability to communicate is the growing use of mobile devices...
With the increasing safety requirements in automation management, an effective vehicle management system is becoming more and more necessary and urgent in all departments. Based on widely application of the advanced information technologies, a practicable system of vehicle dispatching and monitoring is designed for flight service in this paper. Firstly, the target of the system is presented; Secondly,...
In the wireless mobile grid, before the mobile devices move to a selected grid area, the optimal target selection critical to success transfer for mobile devices and meet the requirement of grid tasks to be run. This paper would introduced a Grey relational analysis in the Grey Theory into wireless mobile grid. A target selection algorithm is proposed to improve the transfer efficiency of mobile devices,...
To deal with the challenges posed by device capacity and capability, and also the nature of ad hoc networks, service discovery model is needed that can resolve security and privacy issues with simple solutions. The use of complex algorithms and powerful fixed infrastructure is infeasible due to the volatile nature of mobile ad hoc environment and mobile devices. This paper presents a Secure and Lightweight...
Multi-antenna wireless communication systems exploit channel diversity otherwise not available in Single Input Single Output (SISO) channels. Implementation of wireless Multiple-Input Multiple-Output (MIMO) systems is problematic due to the large sized operational wavelengths over the small dimensionality of the mobile devices. An Adaptive Virtual Relaying MIMO (AV-RMIMO) technique shown in this paper...
Wireless networks have contributed to the technological advance that popularized the use of mobile devices, and fostered the development of applications targeted to these devices. However, issues such as mobility and communication intermittency, as well as processing, storage and battery constraints demand changes in the traditional software testing process. This paper aims to present testing requirements...
A new face tracking algorithm, and a human-computer interaction technique based on this algorithm, are proposed for use on mobile devices. The face tracking algorithm considers the limitations of mobile use case - constrained computational resources and varying environmental conditions. The solution is based on color comparisons and works on images gathered from the front camera of a device. The face...
We evaluate the battery life of mobile devices that act as full-fledged peer nodes in a Kademlia DHT based P2P overlay network. The motivation is to find out how long a mobile peer is able to function in a UMTS or WLAN access network, and how the different parameter settings affect this battery life; this is interesting as mobile access to P2P networks is expected to become common in the near future...
This paper presents an evaluation of in-network caching strategies for efficient delivery of content to mobile devices that are intermittently connected to the network. Placement of content into in-network caches is formulated as an optimization problem that minimizes access latency under certain cost constraints. Several heuristic solutions (longest lifetime, split & longest lifetime and proportional...
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