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Wireless sensor networks (WSNs) include a large number of distributed sensor nodes that consist of sensor, microcontroller and transceiver block. As the main source of energy sensor nodes usually use non-rechargeable batteries, so that the stored energy is a very important resource of a WSN. The main goal of this paper is estimating the battery lifetime of a sensor node in respect to the usage pattern...
In this paper, we present a new beacon recognition method for wireless sensor devices to access beacon-enabled WSN with low-power consumption. At first, we explain necessity of the low-power beacon recognition in the beacon-enabled wireless sensor networks. By realigning network resources, we catch that beacons are in the same position in each BI (beacon interval). Then, we propose how to switch operation...
This paper presents a regenerative sampling oscillator for the simultaneous regeneration of phase and amplitude, which enables highly efficient QAM schemes in the mm-wave range to reach multi-Gb/s data rates. A nonlinear model is derived to study the phase regeneration and the startup behavior of the oscillator and is simulated in CADENCE. A cross-coupled circuit is fabricated in a 0.13-μm SiGe BiCMOS...
We implemented a controller in a form of a dollhouse and toy household appliances. Small children can operate actual household appliances in their environment with the controller. When children touch a NFC tag attached to a toy house appliance in a dollhouse, the corresponding actual household appliance is operated via Wi-Fi router. The dollhouse is nested in the smart house and it provides feedback...
The Xhaul architecture presented in this article has a goal of developing a 5G integrated backhaul and fronthaul transport network enabling flexible and software-defined reconfiguration of all networking elements in a multi-tenant and service-oriented unified management environment. The Xhaul transport network is required to have the capability of carrying multiple traffic, such as CPRI and Ethernet,...
Recent development of wireless communication systems and standards is characterized by constant increase of allocated spectrum resources. Since lower frequency ranges cannot provide sufficient amount of bandwidth, new bands are allocated at higher frequencies, for which operators might resort for deploying more base stations to ensure the same coverage. Connecting increased number of base stations...
Multichip systems with memory stacks and various processing chips are at the heart of platform based designs such as servers and embedded systems. Full utilization of the benefits of these integrated multichip systems need a seamless, and scalable in-package interconnection framework. However, state-of-the-art inter-chip communication requires long wireline channels which increases energy consumption...
Today, Internet of Things technology is preferred compared to manual systems. With the rapid increases in the number of users of Internet over the past decade, this situation has made Internet a part and way of life. Internet of Things, IoT is the latest and emerging internet technology. Internet of Things is known as a growing network of everyday activities from industrial machine to consumer's goods...
In recent wireless networks, end-nodes are capable of detecting the existence of multiple wireless standards. In this context, it becomes very interesting to design an on-line reconfigurable communication system controlled by a Vertical Handover Algorithm (VHA) that allows selecting the best available wireless standard. In this demo, we propose implementing the Partial Reconfiguration (PR) technique...
This paper investigates a high power factor switch-based wireless power transfer front-end circuit for heterogeneous systems. This circuit uses an integrated switching rectifier, implemented in 0.18um 1.8V/5V CMOS process. An integrated pair of phase synchronizers is used to align the waveshape of a wirelessly-coupled sinusoidal voltage source in the receiving coil to the corresponding conducting...
In this paper, we call for a paradigm shift away from the wireless-access focused research efforts on 5G networked systems. We believe that the architectural limitations should share equal blame on issues of performance, reliability, and security. We thus identify architectural weakness on both sides of the mobile clients and the 4G network infrastructure. Our recent findings show that, contrary to...
The Link Fabrication Attack (LFA) in Software-Defined Networking (SDN) involves an attacker forging a new link in the network, providing them with control over traffic which traverses the new malicious link. One method to perform this attack is through the relaying of topology discovery traffic, for which no comprehensive defense exists. This paper proposes to detect this attack using statistical...
Dedicated Short Range Communications (DSRC) is a wireless communication standard intended for high speed secure communication between vehicles and the infrastructure. In order to overcome the limitations that vehicular environment imposes such as high mobility, IEEE published the 802.11p amendment widely known as Wireless Access in Vehicular Environment (WAVE). To the best of our knowledge, most of...
As a promising complement to the increasingly congested wireless fidelity (WiFi) system, light fidelity (LiFi) has recently drawn massive attention due to the wide and unregulated visible light spectrum. Also, the light waves cannot penetrate walls which enables interference avoidance between compartments. Meanwhile, LiFi access points (APs) have a much shorter range, relative to WiFi APs. A hybrid...
The energy consumption of the base station(BS) accounts for great proportion of the total energy consumption of the wireless access network(WAN). It would save a large amount of energy that operators switch off a part of spare BSs during the time of less network request. It is difficult to deploy a BS energy saving strategy in the current network architecture because of the tightly coupled network...
Due to the limited coverage range of access points (APs) and the mobility of stations (STAs), handoff occurs frequently in IEEE 802.11 wireless local area network (WLAN). However, traditional handoff mechanisms employed at STAs have inherent defects which make it hard to realize seamless handoff, it is a challenging issue for supporting seamless handoff service in WLAN. Extensions to Software Defined...
In this paper, we consider optimal transceiver design and relay selection for simultaneous transfer of data and energy in a cooperative network consisting of amplify-and-forward (AF) relays. In this context, we address two different problems and propose optimal relay selection and transceiver processing. Furthermore, the problems are formulated for both time switching (TS) and power splitting (PS)...
The emerging 5G networks are intended to enable new feedback control applications, run over multiple wireless interfaces. 5G wireless technologies then need to match the state-of-the- art wired network performance, experienced by present commercial feedback control systems. Fibre-optic circuit switched communication is characterized by constant and very low loop delays, uniform and very high sampling...
In this paper, we investigate wireless information and power transfer in full-duplex (FD) two-way massive MIMO amplify-and-forward (AF) relaying network. In the considered network, the relay is an energy demander and applies time switching scheme to harvest energy from the users for amplifying and forwarding the users'' signals. Different from prior studies, MIMO users and antenna correlation are...
This paper proposes a wireless ultra-wide area backhaul network consisting of fixed/mobile access points and a wireless backhaul switch with large scale array antenna for 5G mobile communication. We also consider a hybrid beamforming scheme for wireless ultra-wide area backhaul network. We designed an analog beamformer using the genetic algorithm for sum rate maximization, and conducted channel modeling...
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