The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Rapid growing demand for mobile traffic and severe service bursts generated by various mobile applications are challenging the capacities and management of future cellular networks. The measurement data from real cellular networks indicate that the mobile Internet traffic expresses long-range dependence (LRD) characteristics, which differs from the traditional exponential assumption as well as 3GPP...
Skyline queries are useful in decision making applications. Skyline queries in highly mobile distributed environments have attracted many attentions recently due to the development of mobile internet device. The properties of distributed computing make skyline queries more complicated especially in any subspace. Conventional skyline algorithms do not support subspace skyline queries in distributed...
Smartphones have become more and more popular in the past few years. Motivated by the fact that location plays an extremely important role in mobile applications, this paper develops an efficient local message dissemination system PASA based on a new communication model called passive broadcast. It is based on the method of overloading device names described in MDSRoB [14] and Bluejacking [23]. In...
The evaluation and selection for disposition plans of ex-service equipment is a multipurpose process with abundant uncertain factors. The paper builds up the evaluating index system of disposition plans of ex-service equipment, taking a kind of ex-service mobile kitchen trailer as an example, uses analytic hierarchy process method to give weights to the index system, adopts fuzzy comprehensive evaluation...
Archiving of Internet traffic is essential for analyzing network events in the field of network security. Currently, bitmap indexing is used to accelerate the indexing and search queries for archival traffic data. However, the generation of bitmap index needs large storage space, which makes bitmap index compression is a must-have function. In this paper, we propose a new bitmap index encoding algorithm...
Traffic zoning which could simplify complex urban traffic network is a fundamental work in urban planning and transportation management. Traditional traffic zone division is mainly on census data which cost tremendous resources but could only cover part of people and areas in city. This paper develops a comprehensive approach of traffic zone division on mobile billing data which owns the advantages...
With mobile video data traffic increasing, enhancing video quality of experience (QoE) has become an important issue. HTTP Adaptive Streaming (HAS) is a solution to give the user better experience by providing different video rates in changeable bandwidth. To infer the HAS QoE in LTE network, HAS engine we designed can produce video rates reflecting the viewer's subjective feeling adequately. Using...
Cities typically face a wide gamut of management and maintenance problems. Existing automated sensor based solutions are prohibitively expensive to deploy. Furthermore, these solutions need to be complemented by incorporating human judgment for accurate, timely and cost-effective city-related event identification. To this end, this work proposes City Zen, which is a novel platform for event reporting...
In this paper, we propose a general smartphone user activity prediction framework utilizing the general concept of partial repetitive behavior (instead of the stronger periodicity condition) for similarity scoring and the landmark behaviors (representative behaviors to identify groups of similar behavior vectors). Prediction of the next-day(s) behavior is based on a weighted sum of the most similar...
Aperture tuned antennas are becoming more common in Smart Phone Handsets to address radiated efficiency issues caused by industrial design constraints and increased frequency requirements. This paper focuses on a real application example of a MEMS Digital Variable Capacitor (DVC) from Cavendish Kinetics in antenna aperture tuning. The OTA performance is bench-marked against using state-of-the-art...
Mid-range wireless power transfer can be achieved by considering suitable resonators coupled via their reactive magnetic field. Network theory can be used for their theoretical modeling, but full-wave CAD is required for accurate design. For the time being, optimization of wireless power transfer systems has been realized only experimentally. In this paper, we present an efficient way to implement...
The article deals with potential methodological approach for economical efficiency assessment of radio spectrum conversion for new mobile wireless technologies in the conditions of the limited released budgetary provisions. The task of choosing the conversion efficiency criterion was considered, the linear optimization model of conversion based on the procedural approach was proposed in the article...
Data access is an important and challenging issue in Mobile Social Networks (MSNs), and cooperative caching is an effective technique to improve the access performance. Most of current research efforts in data access of MSNs focus on improving the access performance while neglecting the fair treatment of users. Because fairness is considered as a major incentive for peer-to-peer service especially...
Cooperative content offloading is a promising technology to lessen heavy burden of wireless networks and improve the quality of downloading services. Since few users are voluntary in providing free assistance, auction-based incentive mechanisms are designed to encourage participation. In existing auction-based incentive mechanisms, each provider only acts as a service seller. However, a provider could...
This paper investigates QoS-aware relay selection and subcarrier assignment in cooperative OFDMA networks. In contrast to some existing works, which solve the sum-rate maximization problem directly, we first simplify it by exploiting the structure of the optimal solution, then we solve the simplified problem. To characterize the optimal network sum-rate performance, we solve the simplified problem...
The modern approach in wireless multimedia communications is toward the adaptation of transmission parameters subject to internal and external requirements and constraints, represented by, e.g., the user QoS, the propagation environment, the traffic behavior, the external interferences. One of the most challenging issues that arises during the parameters adaptation is the temporal behavior due to...
IEEE 802.11ah enables new use cases such as smart grid and smart metering for 802.11 with an increased transmission range that reaches up to 1 km at 150 kbps. However, such a large outdoor network creates more hidden nodes due to a much higher path loss between stations than between a station to an access point (AP). 802.11ah has adopted a slotted medium access scheme and an AP assisted medium access...
A common program view adapted by most contemporary compilers is Static Single Assignment (SSA) which can be realized as transitional form (TF). In SSA, each variable is modified by exactly one assignment. SSA is based on splitting variables of the original program into many versions. Power constraints of sequential programming led parallel programming to be the main programming style today for performance...
A design problem of positioning system for indoor mobile multi-robot platform is investigated in this paper. Based on knowledge of image features, color features and shape features are used to distinguish indoor targets and obtain the positions of mobile multi-targets. The image processing library OpenCV and Microsoft Foundation Classes multithreading technology are used to extract image features...
In a mobile environment, data broadcast paradigm has been recognised as an effective and scalable mechanism to disseminate frequently requested information to a large number of mobile users. This paper presents the design and implementation of a power preserving mobile broadcast system. The broadcast system is designed to serve transitive queries or queries that access related data items belonging...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.