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In the context of connected industries mobility and flexibility are becoming increasingly important. Accordingly, the use of cascaded communication networks consisting of wired and wireless subnetworks is of interest to support these features. However, by cascading different subnetworks, additional occurring latencies negatively influence the real-time behavior of the overall communication. These...
Designing wireless industrial communication for factory automation is a serious task because novel radio systems have to compete with well established wired fieldbus solutions. The requirements to achieve equivalent reliability and latencies impose challenging demands on design and implementation. In this paper, we propose a hardware accelerator for highly adaptive and parallel medium access allowing...
With the rapid growth of smart devices such as smartphones, tablets, and laptops, traffic demands in IEEE 802.11 wireless local area networks (WLANs) has been increased exponentially. To meet the demand, in recent years, numerous access points (APs) have been deployed in many places such as residential areas, shopping malls, airports, office and campus buildings. As the density of 802.11 WLAN increases,...
In this paper, a high-reliability and ultra-low-latency wireless MAC protocol for industry automation applications is introduced. The proposed MAC protocol supports the flexibility, mobility and scalability of the wireless industrial LAN, approaching the data throughput and latency performance of the recent wired industrial LAN. We demonstrate the MAC performance as function of several network parameters...
In this work, information security of a cooperative wireless communication system over three-phase amplify-and-forward (AF) two-way relaying channels is investigated. A relay power allocation scheme is proposed to improve secrecy capacity of the system. We first derive the secrecy rate expression for the basic scenario which consists of one source, one destination, one single relay, and an eavesdropper...
This paper investigates the ergodic capacity of a multi-input multi-output (MIMO) wireless powered communication system with partial channel state information at the power beacon (PB). Employing time splitting protocol, the PB first transmit energy-bearing signals to the energy constrained source S through beamforming, and then S uses this energy to transmit information to the destination. Unlike...
To satisfy various quality-of-service (QoS) requirements of different services in future fifth generation wireless networks, wireless virtualized network (WVN) architectures have been proposed to concurrently fulfill diversified service demands via network slicing technologies. Considering the dynamic characteristics of wireless channels and user traffic, the resource allocation problem in a WVN with...
The performance of fingerprint based indoor localization techniques is significantly degraded by environmental dynamics especially when devices such as Wi-Fi access points (APs), which are used to build fingerprint database, are densely deployed. The primary reason is that the plug-and-play feature of these devices would render the fingerprints in the database invalid. Worsestill, the time-varying...
Accessing the Internet through Wi-Fi networks offers an inexpensive alternative for offloading data from mobile broadband connections. Businesses such as fast food restaurants, coffee shops, hotels, and airports, provide complimentary Internet access to their customers through Wi-Fi networks. Clients can connect to the Wi-Fi hotspot using different wireless devices. However, network administrators...
The emerging market of the Internet of Things (IoT) requires new energy-efficient and low-complexity Multiple-Input-Multiple-Output (MIMO-) aided radio access technologies. This trend will have a profound impact on both the theory and practice of future communication networks, which will not be purely optimized for approaching the attainable capacity anymore, but will explicitly include the energy...
The concept of mesh networks brings many challenges to the research community when designing such system. In this paper, we propose a new routing model to account for the link utilization between nodes, as well as the remaining energy left in each node. The framework, called Distributed Split-path, is implemented on top of the Optimized Link-State Routing (OLSR) protocol. We demonstrate the improvement...
Fog Radio Access Network(F-RAN) is a promising technique for the fifth generation mobile communication system to provide high spectral and energy efficiency. In comparison with Cloud Radio Access Network, the Radio Units in F-RAN are equipped with local caches, which store popular content. In this paper, we investigate joint cooperative beamforming and radio units (RUs) operation in F-RAN system to...
Tire Pressure Monitoring Systems (TPMS) offer real-time diagnostics of the status of a vehicle's tires via a wireless communications link back to the vehicle. These links, which provide data, mandated by the NHTSA, generally possess low security/low privacy, leading to a demonstrated potential for spoofing attacks or tracking a person/vehicle through the unencrypted emission of the tire's unique identifier...
Physical layer security is becoming a promising technology to face the security challenges of diversified and rapidly-growing wireless applications. In this paper, we propose a three-hop secure Orthogonal Frequency Division Multiplexing (OFDM) transmission protocol for the wireless networks with untrusted relays. In the proposed protocol, instead of exploiting the degree of freedom over spatial domain...
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...
We propose a full-duplex dynamic indoor optical-wireless system using photonic integrated circuits with multicasting capability of 10 Gb/s on-off-keying data, backed up by a 60-GHz radio fallback system, with data capacity of >40 Gb/s to realize reconfigurable and reliable high-capacity links to wireless users equipped with localization and tracking functionalities.
Design one-dimensional antenna array of eight-elements using composite materials for wireless imaging transmission system is proposed in this paper. Firstly, the single element is designed to resonate at Zeroth-order using a pair of Double positive (DPS) and Epsilon negative (ENG) materials meta-structured transmission line (MTL). Secondly, using seven of 1:2 T-Junction power dividers based on microstrip...
Radio-on-Fiber has been widely used for solve blind area problem in cellular system. However, it requires optical fiber installation beforehand. Thus cost becomes high, and if optical fiber received damage because of disaster and so on, it requires long time to recover them. We have been proposed cascaded Radio over Fiber and wireless digitalized Radio on Radio entrance link for small cell mobile...
A discrete cosine transform (DCT)-spread fast orthogonal frequency division multiplexing (FOFDM) signal with low PAPR is experimentally demonstrated in a W-band Radioover-fiber (RoF) system. Experimental results indicate, compared to conventional FOFDM, the DCT-spread-FOFDM can obtain a significant bit error rate (BER) improvement as well as relatively flat signal to noise ratio (SNR) for different...
A 5G millimeter-wave radio over fibre optical fronthaul system based on optical heterodyning, utilising an externally injected gain switched distributed feedback laser, is successfully demonstrated. Five bands of UF-OFDM are transmitted over 25 km of fibre and a 28 GHz Vivaldi Antenna wireless link. Transmission performance below the 7% FEC limit is achieved with an aggregate total data rate of 4...
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