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Network Science research within the ITA and NS-CTA explores the challenges and emerging directions for networked armed forces. This paper presents the justification, methodology and supporting tools built by the alliance to promote deeper collaboration among its members in order to accelerate the pace of research and further connect basic research with Army relevance. Our approach leverages virtualization,...
The physical random access channel (PRACH) of a mobile hotspot network (MHN) is based on a single carrier frequency division multiple access (SC-FDMA). In this paper, we introduce a practical filter design of interpolation-based SC-FDMA transmitter for random access preamble generation. A multistage interpolation filter is used to increase the preamble sampling rate of 12.96 MHz to the system sampling...
Wireless Emergency Alerts (WEA) is a public safety system that uses broadcast from cell towers to send geographically-targeted alerts and warnings to cell phones. It is one of the dissemination channels for the Integrated Public Alert and Warnings System (IPAWS). WEA typically broadcasts an alert in the cells with at least some portion affected by the emergency event. When the affected area includes...
Dense small cell (SC) deployments are expected to help handling the explosive growth of mobile data usage. However, the backhaul of these deployments will face several challenges where point-to-point (PTP) and point-to-multipoint (PMP) wireless technologies will be combined forming multipoint-to-multipoint (MP2MP) wireless mesh backhauls. In this context, routing and load balancing solutions will...
Although the amount of Linked Data published on the web is steady increasing, its consumption is still mainly limited to technical users and domain experts. Thus, it is necessary to foster intuitive visualizations of Linked Data, in order to support users without a technical background. We present DBpedia Mobile Explorer, a visualization framework to enable non-experts to visualize Linked Data on...
The tremendous rate of growth in the mobile app market over the past few years has attracted many developers to build mobile apps. However, while there is no shortage of stories of how lone developers have made great fortunes from their apps, the majority of developers are struggling to break even. For those struggling developers, knowing the “DNA” (i.e., characteristics) of high-rated apps is the...
Modern cellular networks utilizing the long-term evolution (LTE) set of standards face an ever-increasing demand for mobile data from connected devices and header compression is employed to minimize the overhead for IP-based cellular network traffic. In this paper, we evaluate the three implementations of header compressions used by these networks with respect to their potential throughput increase...
Commercial advertisement dissemination is one of the most promising applications in self-organizing mobile social networks (SMSN). Lightweight incentives are essential to encourage the participation of mobile users, given that only a few users are voluntary due to limited resources in mobiles. However, existing incentives overlook dishonest behaviors of relays in overstating their costs for higher...
As mobile data traffic is continuously increasing and the average revenues per user are getting lower due to flat-rate changing, operators are in need of means to cope with higher-than-expected data volumes introducing minimal additional capital expenditures. This paper investigates network decentralization in conjunction with the selective IP traffic offload approaches to handle such increased data...
In this paper, we present framing and multiple-physical layer pipe (PLP) structures for layered division multiplexing (LDM)-based next generation terrestrial broadcasting systems. As a framing structure, single-layer frames and multi-layer frames can be simultaneously transmitted by a time division multiplexing (TDM) approach. In addition to a conventional multiple-PLP strategy, which is basically...
Nowadays, cloud-based storage services are rapidly growing and becoming an emerging trend in data storage field. There are many problems when designing an efficient storage engine for cloud-based systems with some requirements such as big-file processing, lightweight meta-data, low latency, parallel I/O, deduplication, distributed, high scalability. Key-value stores played an important role and showed...
Crowd sensing is an effective zero-cost method to map physical spatial fields by exploiting sensors already embedded in smartphones. The potentially huge amount of generated data and random measurement positions represent serious challenges to be addressed. In this paper we propose a combined Gaussian process (GP)-State space method for crowd mapping whose complexity and memory requirements for field...
According to the advancement of mobile devices and wireless network technology, these portable devices became the potential devices that can be used for different types of payments. Recently, most of the people would rather to do their activities by their cellphones. On the other hand, there are some issues that hamper the widespread acceptance of mobile payment among people. The traditional ways...
We study the dynamic service migration problem in mobile edge-clouds that host cloud-based services at the network edge. This offers the benefits of reduction in network overhead and latency but requires service migrations as user locations change over time. It is challenging to make these decisions in an optimal manner because of the uncertainty in node mobility as well as possible non-linearity...
This paper discusses how the combination of model-driven development approaches and business process management (BPM) techniques and tools can be fruitfully applied to personal and social task management, in a consumer scenario where people are provided with user-friendly mobile applications that hide the complexity of modeling behind extremely simple interfaces and interaction paradigms. The main...
The quality of a mobile application is a major concern for developers, users and application stores. Even though several mobile-specific techniques have been proposed to evaluate the quality of a mobile software product, there is little evidence about their applicability as an efficient way to forecast a potential success of a mobile software product in a real app store. In this paper, we investigated...
We propose Fides, a computation offloading mechanism for mobile devices based on trust between them. Fides provides functionalities to the application developers in terms of (i) application splitting and (ii) metric proposal, according to which the offloading decisions will be made. A collective intelligence mechanism is learning the parameters of the ambient environment and selects the proper nearby...
Image scaling is an important processing step in any digital imaging chain containing a camera sensor and a display. Although resolutions of the mobile displays have increased to the level that is usable for imaging, images often have larger resolution than the mobile displays. In this paper we propose a software based fast and good quality image scaling procedure, which is suitable for mobile implementations...
Heterogeneous wireless networks (HetNets) provide a means to increase network capacity by introducing small cells and adopting a layered architecture. HetNets can allocate resources flexibly through time sharing, on-off scheduling and cell range expansion/contraction. As shown in [1] such networks are constrained to a capacity limit in terms of the maximum number of downloads per second which can...
With the rapid progress of mobile Internet and the growing popularity of smartphones, location-aware publish/subscribe systems have recently attracted significant attention. Different from traditional content-based publish/subscribe, subscriptions registered by subscribers and messages published by publishers include both spatial information and textual descriptions, and messages should be delivered...
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