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A low-power biomedical signal acquisition SoC is proposed for continuous health monitoring system. The SoC fully integrates a low-noise analog front-end (AFE), a current-steering low-pass filter (CSLPF), and an output buffer. A DC-rejection loop and a chopping function are added to enhance the noise performance. For processing various bio-signals, the bandwidth can be adjusted to extract the signals...
Traditional healthcare solutions oblige patients to stay in hospital; bio-signal monitoring and treatment dosing require the presence of specialized personnel. In turn, this scenario implies high-cost, especially for chronic diseases or fragile people surveillance. Wearable sensor-based healthcare solutions may be an effective approach for lowering costs, since they offer good performance and can...
NETCONF is emerging as Software Defined Networking (SDN) protocol for the control and management of optical networks. It enables data plane device configuration and access to monitoring information. NETCONF may exploit YANG data model to describe network elements to be controlled/managed. YANG and NETCONF are of interest for operators since they provide a standard way to control and manage network...
For years, Virtual Network Operators (VNOs) are a major player in the satellite communication market landscape. Typically, they repackage services leased from Satellite Network Operators (SNOs) to provide their customers with added-value end-to-end services that mostly go beyond the satellite network and cover terrestrial networks. However, the level of control and visibility that VNOs have on their...
Software defined networking (SDN) provides a centralized control framework with real-time control of network components, residential customer routers in particular, that allows automated per-user bandwidth allocation. However, employing dynamic traffic shaping for efficient bandwidth utilization among residential users is a challenging task. In this context, understanding application usage requirements...
New data intensive applications, which are continuously emerging in daily routines of mobile devices, significantly increase the demand for data, and pose a challenge for current wireless networks due to scarce resources. Although bandwidth is traditionally considered as the primary scarce resource in wireless networks, the developments in communication theory shifts the focus from bandwidth to other...
As one possible continuation of development of Masat-1, the first Hungarian satellite, in 2015, a group of student, from Faculty of Electrical Engineering and Informatics and Mechanical Engineering, decided to realize a PocketQube-class satellite, called Smog-1. Smog-1 is a 5 cm cubesat as PocketQube with less than 180 g mass. The aim of Smog-1 is to measure the radio frequency (RF) smog caused by...
Internet traffic reports show that YouTube is one of the major sources of data traffic world-wide. Furthermore, the data traffic shifts from mostly fixed landlines to cellular data connections where bandwidth is sparse and expensive. Previous studies revealed that YouTube uses a user-friendly HTTP Adaptive Streaming (HAS) strategy which sacrifices bandwidth efficiency to increase the average playback...
We propose a novel technique for the accommodation of mobile base stations (BSs) and a secondary system with a time division duplex (TDD) frame monitor. By increasing the number of BSs accommodated in a passive optical network (PON), the cost of mobile fronthaul (MFH) can be reduced. To realize even further cost reduction, a secondary system is accommodated in the PON with the MFH while the mobile...
In an attempt to face the anticipated spectrum crunch and inspired by the possibility of extending LTE-A to the unlicensed spectrum (LTE-U), in this paper we devise an adaptive channel assignment scheme for video streaming over LTE-U small cells. The proposed scheme adaptively assigns video frames to a subset of monitored channels with the objective of reducing possible starvation instants at user...
With most Universities and Colleges adopting the use of e-learning to provide daily activities for learning, google search and other search engines for research, Internet is then referred to be a critical component of success by the researchers, lecturers and students. Analyzing network traffic is usually a challenging task for network administrators due to the types and complexity of traffic. The...
The use of mobile devices for work and for entertainment is growing. However, some applications may consume too much battery or be too CPU intensive for those devices. One alternative is to dynamically offload parts of the computation of those applications to the Cloud, reducing the battery usage of the devices and improve the responsiveness of the applications. One of the biggest challenges in offloading...
Wireless sensor networks (WSNs) are susceptible to most security attacks. There are some limitations such as reliability, energy efficiency, and scalability, which affect sensor nodes. These limitations mostly affect the security of wireless networks. Also, limited capacity of sensor nodes accounts for the security attacks on WSNs. Applications such as military surveillance, traffic surveillance,...
The Amazon Rainforest degradation is a worldwide concern. The rainforest has been endangered by the illegal wood extraction without control even in the preservation areas. Due to the large geography extension prevent these crimes with an unmanned aerial vehicle (UAV) is not always possible. The Wireless Acoustics Sensor Network (WASNs) technology can alleviate this problem. Here, we present an acoustical...
Cloud data centers today use visualization technologies to facilitate allocation of physical resources to multiple applications. As cloud data centers continue to grow in scale and complexity, effectively monitoring and identifying system anomalies is becoming a critical problem. Furthermore, due to complex dependencies between system components in a virtualized data center, a single cause of anomaly...
Live video streaming over internet is becoming popular more and more. Current commercial live video streaming systems are based either on a typical client-server (cloud) or on a peer-to-peer (P2P) architecture. The former is preferred for stability and QoS, provided that the system is not stretched beyond the server's bandwidth capacity, while the latter is scalable with small bandwidth and management...
We establish a framework that can be used by Origin Servers (content-generating organizations) for claiming Content Delivery Network (CDN) resources in a fine-grained way. The basis of our work lies in the use of Stocks as well as a Secondary Market for the stock trading, tools and products commonly used in modern capital markets. Network and disk resources are being monitored through well-established...
With the rising growth trend of data size in the Internet era, storage, analysis, and processing of big data arebecomingamong the strongtopics in academia and industry. Typical big data processing platforms adopt the MapReduce programming model to perform application processing. For example, the deployment and calculation method of Hadoop are as follows: Hadoop first collects data and stores them...
Principal component analysis (PCA) is not only a fundamental dimension reduction method, but is also a widely used network anomaly detection technique. Traditionally, PCA is performed in a centralized manner, which has poor scalability for large distributed systems, on account of the large network bandwidth cost required to gather the distributed state at a fusion center. Consequently, several recent...
This paper introduces the control of a photovoltaic (PV) interface converter ready to offer auxiliary service - reactive power control - that also has Phasor Measurement Unit capability. A prototype of the controller is implemented using a National Instruments Compact RIO and tested using Hardware In the Loop techniques. Experimental results demonstrate the converter functionalities.
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