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Conversational agents are often used to perform tasks on smartphones, but existing conversational agents are limited in capabilities and lack of customizability. My work explores using the programming-by-demonstration approach to enable end users to program new tasks for conversational agents by demonstrating using the familiar graphical user interfaces of third-party apps. I propose to use a multi-modal...
LTE is a globally deployed standard. CSFB (Circuit Switched Fallback) is one of the major voice solutions in LTE network. We found one vulnerability in CSFB where the authentication step is missing. This allows an attacker to impersonate a victim. We named this attack as ‘Ghost Telephonist’. The consequence of this attack include: (1) The attacker can impersonate the callee and obtain the content...
Channel estimation is one of the most important parts in current mobile communication systems. Among the huge contributions in channel estimation studies, the discrete Fourier transform (DFT)-based channel estimation has attracted lots of interests since it can not only be easily implemented but also have acceptable performance in practical systems. In this paper, we propose an improved DFT-based...
The advancements of Information and Communications Technologies (ICT) have contributed to an explosive growth of high-volume, high-velocity and high-variety information assets, and the era of Big Data has emerged. The infrastructure-based networks are becoming increasingly overloaded, while the cost of maintaining and expanding the infrastructure to accommodate the Big Data communications remains...
The growth of Mobile cloud computing (MCC) is challenged by the need to adapt to the resources and environment available for mobile clients while working with the dynamic changes of network bandwidth. In this paper, we propose a model of computation partitioning for stateful data in the dynamic environment that will improve performance. First, we constructed a model of stateful data streaming and...
In this paper, a novel distributed caching strategy in mobile social networks based on device-to-device communications is proposed. The proposed approach combines the characters of social networks to handle some practical issues, e.g., the selfishness of users. In order to maximize the throughput of the whole system, a fast convergence learning automaton, called the discrete generalized pursuit algorithm...
This paper aims at providing a green battery solution for practical wireless communication systems. First, we discuss the demands and latest developments of wireless energy transfer (WET) in relevant industries. Second, we propose a user- centric energy-efficient approach in wireless powered communication networks (WPCNs), where mobile users first harvest energy from a dedicated power station and...
A novel weighted damping coefficient based manipulability maximizing (WDCMM) scheme is proposed and investigated in this paper for the motion planning of wheeled mobile redundant manipulators. Such a scheme treats the mobile platform and the redundant manipulator as a whole system, and is thus called a coordinated control scheme. In order to improve the manipulability during the end-effector task...
Grasping individual objects from an unordered pile in a box has been investigated in static scenarios so far. In this paper, we demonstrate bin picking with an anthropomorphic mobile robot. To this end, we extend global navigation techniques by precise local alignment with a transport box. Objects are detected in range images using a shape primitive-based approach. Our approach learns object models...
In this paper, the author should analyze the mobile learning from five dimensions of adaptive systems framework??Cand introduces the implementation technology of adaptability mobile learning from the user information collection, mobile smart client and WML, in order to meet different needs of customers. Meanwhile to make the learning content and user more suitable for learners to study anytime and...
This paper studies the problem of determining the optimum degree distribution for distributed LDPC codes in two-way relay channels. Based on the framework of multi-edge type (MET) LDPC codes, we propose a methodology to asymptotically optimize the code's ensemble when different segments within the distributed codeword have been transmitted through different channels and experience different SNRs....
In this work we investigate the use of location information in the context of emerging 4G wireless communication systems, in which cooperative communication among mobile nodes is utilized. We first determine the optimal throughput achievable in such systems under the assumption of perfect knowledge on the locations of the mobile nodes. We then investigate how the system throughput is significantly...
Self-deployment is one of the main research issues in wireless mobile sensor networks. It determines quality of service of networks, such as coverage and connectivity. In this paper, we present a distributed self-deployment algorithm by distance and orientation control (DOC). Distance control tries to keep the distance among sensor nodes equal to the ideal distance in equilateral triangle grid deployment,...
In this paper, we present and analyze the results of MING-T project, sponsored by EU with partners from several countries in Europe and China. The results include both the field trials and the indoor experiments covering four key technologies developed in the project: reliable data services in broadcast networks, interactive services in broadcast networks, handover between DVB-H and DTMB, scalable...
This research aims to develop a new sensor-based localization technique which is exclusively used for forest fire detecting systems. Our algorithm addresses three key criteria of forest fire detecting systems deployed in nature, which are: low complexity, high efficiency and low power consumption, by the 2 features: estimating a grid-based output and adopting an event-triggering mechanism. The algorithm's...
This paper presents an adaptive capability control technology to reduce training data in channel equalization, and designs a new space-time equalizer based on structure risk minimum criterion (SRM-STE). Simulation is carried out and the results are compared with a typical recursive least squares space-time equalizer (RLS-STE). It is concluded that SRM-STE has better tracking performance with much...
Recent advances in design of transmit/receive (T/R) switches in complementary metal oxide semiconductor (CMOS) technology for radio transceivers are reviewed in this paper. First, the evolution of wireless communication systems and CMOS technology are introduced for the purpose of design of T/R switches. Then, typical T/R switch topologies, key performance parameters, and device circuit models are...
In a mobile ad-hoc network (MANET), node mobility has a significant impact on the performance of routing protocols. Most of the previous research has been focused on entity mobility models, i.e., movements of the mobile nodes are independent of each other. In this paper, we investigate the impact of swarming behavior of mobile nodes, as observed in many mobile networks, on the performance of MANET...
Based on the analysis of the background and applications of mobile government (MG), this paper studied the influences of MG on government managements and made some propositions on the development of MG, including perfecting MG relevant laws, regulations and standards, establishing information security system of MG, reengineering and optimizing the administrative business processes, and strengthening...
The mobile shopping assistant (MSA) is a mobile application platform to deliver real-time, in-store, and personalized services, such as personalized product offerings and in-store customer advisory support, to improve the shopping experiences of in-store customers. The service delivery network that powers the MSA involves retail stores and their business partners such as manufacturers. This paper...
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