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The recent spread of mobile networks has paved the way for building a pervasive social networking (PSN) environment, which enables people to access social networking services (SNS) anytime and from anywhere. There have been extensive studies on MANETs (Mobile Ad-hoc NETworks), which use mobile terminals for relaying information. While the feasibility of using them as emergency networks in the aftermath...
Currently deployed wireless and cellular positioning techniques are optimized for outdoor operation and cannot provide highly accurate location information in indoor environments. Meanwhile, new applications and services for mobile devices, including the recent Enhanced 911 (E911), require accurate indoor location information up to the room/suite level. In this work, a new system for improving indoor...
In this paper, we propose a novel m-th best average biased received power (ABRP) user association (UA) scheme for K-tier heterogeneous networks (HetNets), where a user is associated with the base station (BS) having the m-th strongest ABRP. For this novel scheme, by using stochastic geometry and modeling the positions of network elements in each tier as a homogeneous Poisson point process (PPP), we...
In current wireless cellular networks, generally a mobile station is able to acquire its position through diverse positioning techniques. Incorporating position and communication will improve the wireless system performance. In this paper, we propose position based power control and mode handover methods for hybrid wireless cellular and D2D (Device-to-Device) communications. Each mobile station passes...
Location-based queries have brought challenging privacy issues for mobile users. Having access to data, anytime from anywhere, raises many security concerns. One of these concerns is user's location privacy, where a user must reveal her location to get the desired result. The question is how to benefit from such queries without endangering user's location privacy. This paper presents a new method...
Within the necessary security requirements, access control measures are essential to provide adequate means to protect data from unauthorized accesses. However, current and traditional solutions are commonly based on predefined access policies and roles and are therefore inflexible by assuming uniform access control decisions through people's different type of devices, environments and situational...
Considering efficiency, labor costs and the risk of injury existing in maintenance methods for power substation equipment, this paper designs a live maintenance mobile robot system for power substation equipment, whose mechanical structure mainly includes mobile platform system based on Mecanum wheels and maintenance arm system. In addition, a kinematic model of the live maintenance mobile robot is...
This paper presents an application that will be used in shopping malls. It is an indoor positioning system (IPS) based mobile application. The main idea is providing a win win situation between the customers and stores. It will be utilized in the store or in front of the store with a check in at the store. Thus, the customer will easily reach many offers, product explanations of the considered store...
This paper is concerned with the exponential stabilization problem for a class of distributed parameter systems (DPSs) described by a parabolic partial differential equation (PDE) with mobile actuators and sensors. Initially, the mobile guidance for each actuator/sensor pair is proposed based on the system performance requirement and the well-posed analysis of the DPS is given via the operator semigroup...
Chirp slope keying (CSK) modulation based on linear frequency modulation signal (LFM) and hyperbolic frequency modulation signal (HFM) combined with passive time reversal (PTR) for mobile underwater acoustic communication is proposed in this paper. For CSK modulation, the carriers are LFM and HFM signals, and the bit information is represented by different signals. A PTR processor is designed at the...
Mobile phone front-end and baseband modules are hard to obtain on the market for end customers. Thus, software defined radios are widely used in research and development, enabling many opportunities for digital signal processing. In this publication a novel option to receive GSM signals is suggested by using an ultra-low power Sub-GHz transceiver in a legacy mode. The device outputs raw demodulated...
A Matlab program to simulate the Line Following Robot was developed as a didactic tool to learn the theory of fuzzy control. The Simulink environment is used to model the dynamics of mobile and the fuzzy controller, and a Script is used to model the line form and the deviation of the mobile from the line. The Simulator allows evaluating the performance of Proportional-Derivative (PD) Fuzzy Control...
QoS of applications in an edge node of mobile edge computing (MEC) could degrade due to congestion of wireless access or short of mobile edge computing resource. In order to improve QoS such as TCP throughput, we propose a VM migration method, which takes a VM from congested node to another node in a mobile edge. Users can choose a far but less-congested node, instead of a near but congested node...
This paper presents the application of the Monte Carlo method for non-detected failure analysis on the mobile seat platform across the dynamic system testing on the commercial vehicle. This method has been applied in automotive embedded software of OEM components to reduce project development time, provide standardization and to predict software errors and look towards quality improvement. With growing...
In this paper, active disturbance rejection control is designed for position/force control of a holonomic constrained mobile manipulator in presence of uncertainties and disturbances. A dynamic model of the mobile manipulator is derived, based on the Lagrange formulation. The basic idea of the proposed control design is to estimate the unknown internal dynamics of the mobile manipulator and external...
First, the received signal strength indications (RSSIs) of the three tags on a triangular apparatus surrounding a target human (TH) are read by two perpendicular antennas with one reader. These 6 RSSIs and their corresponding pose and the azimuth angle of the TH with respect to the autonomous guided vehicle (AGV) or antenna are attained. Since the relations of these pairs of input and output are nonlinear,...
This paper presents an adaptive nonsingular terminal sliding mode formation control by means of output recurrent fuzzy wavelet neural networks for a group of networked heterogeneous Mecanum-wheeled omnidirectional robots with uncertainties. The dynamic behavior of each uncertain heterogeneous omnidirectional robot is modelled by a reduced three-input-three-output second-order state equation with uncertainties...
This paper presents results of a survey that explored the challenges low-income mobile users of Dhaka, Bangladesh (N = 131) face in mobile text entry. Results revealed that all users use the Bengali language at some capacity to compose text, yet many (are forced to) write with the Roman alphabet. Both feature phone and smartphone users feel that the existing text entry techniques are difficult to...
This paper presents a conceptual framework for co-design (by multidisciplinary team) Location-based Mobile Learning Applications. Four stages are identified related with this kind of applications: conceptual design, development cycle, put into practice and evaluation. This paper is focus on the first stage, the conceptual design. For this stage, relevant features are described. In particular, good...
While smartphone« and mobile apps have been an integral part of our life, modern mobile apps tend to contain a lot of rarely used functionalities. For example, applications contain advertisements and offer extra features such as recommended news stories in weather apps. While these functionalities are not essential to an app, they nonetheless consume power, CPU cycles and bandwidth. In this paper,...
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