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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 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 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...
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...
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,...
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...
We propose a new style user interface for browsing and interacting with real-time maps representing a large number of moving objects on mobile devices. The real-time maps show present locations of moving objects such as trains, cars and people on the conventional static maps composed of static geospatial objects such as roads, buildings and rivers. The emergence of the real-time maps can change the...
The paper presents an innovative mobile learning platform QFK (quest for knowledge) which follows the game-based learning paradigm. QFK allows for creation of educational games using multimedia content and playing of the games inside and outside classrooms. Students access educational games using PCs and/or mobile phones in order to complete missions and tasks. Teachers can supervise the game flow...
This paper describes middleware that establishes a MANET environment with mobile devices and exchanges contents in the devices. The middleware also provides a sharing function as a common service among mobile devices.
Mobile search is becoming increasingly important for mobile users as mobile devices are more widely used. Mobile search differs from standard PC-based Web search in a number of ways: (1) the user interfaces and I/O are limited by screen real estate and tiny key pads are tiny, (2) limited bandwidth and costly connection time, (3) increased local search due to mobility. These limitations result in more...
Web services have become extremely important when offering services through the Internet. However, current Web Services are very inflexible as regards their invocation from different types of device, especially when taking into account their adaptation when being invoked from a mobile device. In this paper, we propose several alternatives for the creation of flexible Web services which can be invoked...
NFC is one of the latest wireless communication technologies, making possible variety of business opportunities. StoLPaN, a pan-European consortium of companies, universities and user groups aims to define open commercial and technical frameworks for the remote management of NFC-enabled services on mobile devices. These frameworks will facilitate the deployment of NFC-enabled mobile applications regardless...
In this paper we introduce a novel scenario for environmental sensing based on the combination of simple and cheap RFID-based sensors and mobile devices like mobile phones with integrated RFID readers. We envision a system that exploits the availability of these devices to cooperatively read sensors installed in the environment, and transmit the data to a server infrastructure. To achieve quality...
This article describes several technical aspects of mobile devices, sensor networks and context sensitive services in information systems developed at the authorpsilas university. It examines key features of the technology and the systems, shows multiple methods of accessing mobile content as well as future research potentials.
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