The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, we propose a modular wireless sensor platform that consists of sensor modules. Each sensor module is a part of sensor system and in charge of one job in the system, such as computation, communication, output or sensing. Users can stack multiple modules together to build a unique sensor platform. Since users are able to easily replace one module with others, the proposed platform is...
We propose a novel data detection algorithm and a corresponding VLSI design for large multi-user (MU) multiple-input multiple-output (MIMO) wireless receiver. Our algorithm, referred to as ADMIN, performs alternating direction method of multipliers (ADMM)-based infinity norm constrained equalization. ADMIN is an iterative algorithm that outperforms linear detectors if the number of users is small...
Joint channel estimation and data detection (JED) enables near-optimal error-rate performance in realistic wireless communication systems that suffer from channel estimation errors. In this paper, we propose a new JED algorithm and a corresponding FPGA design for large single-input multiple-output (SIMO) wireless systems that use constant-modulus constellations. Our algorithm, referred to as PrOX...
Low-Power Wide Area Networks (LP-WANs) are emerging as a promising solution for connecting Internet of Things and Machine Type Communication devices. If ultra-narrowband (UNB) networks, a subclass of LP-WANs, reach predicted deployment numbers and densities, they will face two challenges: inter-technology and intra-technology interference. This paper proposes the first experimental architecture designed...
Wireless network virtualization is an emerging paradigm to improve spectrum utilization by sharing wireless resources through slicing. In this paper, we investigate interactions between mobile virtual network operators (MVNOs) and users as a Stackelberg game. We leverage wireless virtualization while creating MVNOs that provide wireless coverage by subleasing the frequencies from owners of wireless...
When different technologies use the same frequency bands in close proximity, the resulting interference typically results in performance degradation. Coexistence methods exist, but these are often technology specific and requiring technology specific interference detection methods. To remove the root cause of the performance degradation, devices should be able to negotiate medium access even when...
We consider a scenario in which an operator installs (small cell) base stations on top of city buses to offer better quality of experience (QoE) to their passengers. In that case, providing a consistent backhaul rate (i.e., a constant rate at all times) to these base stations could help mitigate the effects of mobility on the QoE. Specifically, we perform the analysis to determine the maximum consistent...
This paper proposes the Cella Ecosystem (CelEc) concept for emerging 5G ultra dense Networks, to evolve and supplement the Mobile Radio Network by using the crowd's User Equipments (UEs), densely distributed in our physical world and environment, as an integral part of the Infrastructure. Towards this end, CelEc establishes a decentralized ecosystem (the CelEc Tier) of numerous, unbound and ubiquitous...
In this paper, optimal content caching strategy is proposed to jointly minimize the cell average outage probability and fronthaul usage in cloud radio access network (Cloud-RAN). Closed form expression of the outage probability conditioned on the user's location is presented, and the cell average outage probability is obtained through the composite Simpson's integration. The caching strategy for jointly...
In this paper, we propose OWCells, a class of optical wireless cellular data center network architectures in which fixed line of sight (LOS) optical wireless communication (OWC) links are used to connect racks of servers arranged in regular polygonal topologies. We present the OWCell DCN architecture, develop its theoretical underpinnings, and investigate routing protocol and OWC transceiver design...
In recent years, Vehicular Ad hoc Networks (VANETs) has been emerged an enabling technology to provide a wide range of applications for safety and convenience of drivers. However, traditional architecture of VANETs lack of flexibility, scalability, and easy deployment of services. In this context, Software-defined networking (SDN) has emerged as a rapid innovation in the area of networking for both...
Fog computing is seen as a promising approach to perform distributed, low-latency computation for supporting Internet of Things applications. However, due to the unpredictable arrival of available neighboring fog nodes, the dynamic formation of a fog network can be challenging. In essence, a given fog node must smartly select the set of neighboring fog nodes that can provide low-latency computations...
The paper presents implementation of the Ultra-Wideband (UWB) pulse generator suitable for wireless transmission of time-encoded pulse train. Application of the UWB pulse generator enables direct pulsed triggering from the output of Time Encoding Machine (TEM). The pulse generator circuit is designed in IHP 0.24 µm SG25H3 technology. The paper presents simulation results for the pulse power spectral...
In the paper the study of Intelligent Transportation systems implementation in the 5G wireless communication network is presented. Firstly, small-cell concept in Ultra Dense Heterogeneous network was analyzed. Secondly, the 5G network requirements were presented which are important from the point of view of transportation systems development. Next, the study on the 5G network architectures proposals...
With the wide adoption of Internet of Things (IoT) and specifically e-Health applications, the nature of mobile applications, the increased traffic and the increasing number of connected devices are changing the requirements of wireless mobile networking. Addressing such foreseen increase in number of connected mobile devices, our work proposes a new trend of on-demand mobile small-cells with caching...
Conventional mobile computation offloading relies on offline prefetching that fetches user-specific data to the cloud prior to computing. For computing depending on real-time inputs, the offline operation can result in fetching large volumes of redundant data over wireless channels and unnecessarily consumes mobile-transmission energy. To address this issue, we propose the novel technique of online...
This paper presents a wireless temperature sensor for the cancer cell culture on ITO glass substrate. In order to measure the multi-point temperatures in the biochip, the sensor chip is not only a wireless temperature transmitter but also wirelessly powered. This wireless temperature sensor uses a standard TSMC 0.18 µm 1P6M CMOS technology. The measured reference voltage of bandgap voltage reference...
In this paper, a method of interaction with Wireless Sensors Networks (WSN) through cloud, called Wireless Sensor Network over Cloud (WSN-C), is proposed. The physical sensors are not considered stand-alone sensors but they can be monitored, controlled and updated (programmed) via cloud services. The Cloud can communicate with the sensors through the WSN access point, or Sensor Gateway. Thus, every...
This work analyzes a mmWave single-cell network, which comprises a macro base station (BS) and an overlaid tier of small-cell BSs using a wireless backhaul for data traffic. We look for the optimal number of antennas at both BS and small-cell BSs that maximize the energy efficiency (EE) of the system when a hybrid transceiver architecture is employed. Closed-form expressions for the EE-optimal values...
As one of the most popular social media platforms today, Twitter provides people with an effective way to communicate and interact with each other. Through these interactions, influence among users gradually emerges and changes people's opinions. Although previous work has studied interpersonal influence as the probability of activating others during information diffusion, they ignore an important...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.