In the context of modern mobile and embedded communication systems, the increasing storage density of dynamic random access memory (DRAM) poses significant challenges in energy management, with DRAM refresh emerging as a major factor in energy ...

Different mobile-based web applications have become popular among mobile users due to the enormous evolution of mobile communication technologies and hardware technologies. Mobile users can access various web services using mobile ...

The aim of this paper is to propose a real-world deployment in building an Internet of Things (IoT) system for vending machines. We also introduce a new approach for mobile proximity payment for unattended point of sales. The basic idea is to have a ...

Mobility management is one major challenge for wireless network design. Advanced wireless technologies provide mobile nodes with multi-mode radio interfaces, so subscribers can benefit from disparate mobile communication systems. Meanwhile, researchers ...

Many peer-to-peer security protocols in mobile communications utilise shared secrets. Synchronous storage of shared secrets is imperative for the successful operation of security protocols, as asynchronous storage of shared secrets may lead to service ...

WiFi continues to be a prime source of energy consumption in mobile devices. This paper observes that, despite a rich body of research in WiFi energy management, there is room for improvement. Our key finding is that WiFi energy optimizations have ...

We investigate the communication range of the nodes necessary for network connectivity, which we call bidirectional connectivity, in a simple setting. Unlike in most of existing studies, however, the locations or mobilities of the nodes may be ...

The widespread of mobile ad hoc networking calls for a careful design of network functions in order to meet the application requirements and economize on the limited resources. In this paper we address the problem of distributing query messages among ...

Recently, several authentication techniques have been developed for the global mobility network (GLOMONET), which provides mobile users with global roaming services. Due to the hardware limitations, the mobile user cannot support the heavy encryption ...

The benefits of jointly managing the combined set of radio resources offered by heterogeneous networks consisting of several radio access technologies (RATs) have been profusely studied and assessed in recent years. This notion has been coined as common ...

Incorporation of measurement based techniques in Worldwide Interoperability for Microwave Access (WiMAX) are required to improve IEEE 802.16 engineering methodologies. Wireless planning methodologies are presented, supported by a planning tool which ...

An efficient and utmost utilization of currently scarce and underutilized radio spectrum resources has stimulated the introduction of what has been coined Cognitive Radio (CR) access methodologies and implementations. While the long-established approach ...

Employees are increasingly participating in business processes using mobile devices. Often, this is supported by a mobile web application, which accesses various web services in the back-end. The high latency of the mobile network (e.g., EDGE) is ...

Localization algorithm continues to be an important and challenging topic in today's wireless sensor networks (WSNs). In this paper, a novel range-free localization algorithm using expected hop progress (LAEP) to predict the location of any sensor in a ...

How to simultaneously achieve fairness and quality-of-service (QoS) guarantee in QoS-oriented wireless local area networks (LANs) is an important and challenging issue. Targeting at this goal and jointly taking priority setting, fairness, and cross-...

The performance in cooperative communication depends on careful resource allocation such as relay selection and power control, but the traditional centralized resource allocation requires precise measurements of channel state information (CSI). In this ...

We provide the first rigorous analytical results for the connectivity of dynamic random geometric graphs—a model for mobile wireless networks in which vertices move in random directions in the unit torus. The model presented here follows the one ...

Lee and Yeh recently presented a delegation-based authentication protocol for portable communication systems (PCSs), which is claimed to provide non-repudiation in on-line authentication. This investigation indicates that their protocol has a weakness ...

Recent works in empirical 802.11 wireless LAN performance evaluation have shown that cross-layer interactions in WLANs can be subtle, sometimes leading to unexpected results. Two such instances are: (i) significant throughput degradation resulting from ...

The paper focuses on a cooperative environment in wireless ad hoc networks, where mobile nodes share information in a peer-to-peer fashion. Nodes follow a pure peer-to-peer approach (i.e., without the intervention of servers), thus requiring an ...