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.
The present paper studies fair sharing possibilities of stored renewable energy (RE) in densely populated areas among multiple mobile network operators (MNOs). The main objective is to enable MNOs, who already share their infrastructure in terms of a green network operation, to further reduce their power consumption by fairly sharing (i) the solar power harvested during daylight and (ii) the harvested...
In this paper, the spectrum sharing in both licensed and unlicensed bands under heterogeneous networks (HetNets) is investigated. A frame architecture of licensed-assisted access (LAA) in unlicensed bands is introduced by analyzing its statistical behavior of channel access opportunity. A multi-objective optimization problem is then designed for small cell to enhance energy efficiency by jointly maximizing...
Cloud radio access network (CRAN) has been proposed as a potential energy saving architecture and a scalable solution to increase the capacity and performance of radio networks. The original CRAN decouples the digital unit (DU) from radio unit (RU) and centralizes the DUs. However, stringent delay and bandwidth constraints are incurred by fronthaul in CRAN, i.e. the network segment connecting RUs...
As more organizations rapidly adopt cloud services, energy consumption in data centers (DCs) is increasing such that today Information and Communication Technology (ICT) has become a major consumer of energy. A large portion of ICT energy consumption is used to power servers running in DCs and the network they use to communicate. In this study, we consider that, often, energy cost at a particular...
Heterogeneous cellular network (HCN), which generally consists of small cell base stations (SBSs) and macro base stations (MBSs), is proposed as a promising scheme to improve the capacity of the cellular network. However, huge energy consumption by the densely deployed SBSs arises as a challenging problem that should be addressed properly to fulfill the potential of HCNs. In this paper, we aim to...
In this paper we present D.A.V.I.D.E. (Development for an Added Value Infrastructure Designed in Europe), an innovative and energy efficient High Performance Computing cluster designed by E4 Computer Engineering for PRACE (Partnership for Advanced Computing in Europe). D.A.V.I.D.E. is built using best-in-class components (IBM’s POWER8-NVLink CPUs, NVIDIA TESLA P100 GPUs, Mellanox InfiniBand EDR 100...
Mobile devices can now support a wide range of applications, many of which demand high computational power. Backed by the virtually unbounded resources of cloud computing, today's mobile-cloud (MC) computing can meet the demands of even the most computationally and resource intensive applications. However, many existing MC hybrid applications are inefficient in terms of achieving objectives like minimizing...
Cloud radio access network (C-RAN) is introduced as a promising network architecture to meet the ever-increasing mobile data traffic. Baseband processing is decoupled from the remote radio head (RRH) and centralized in a common resource pool in C-RAN architecture, which enables efficient resource allocation. In this paper, we study the user association problem in order to better utilize wireless resources...
This work explores the design space (bandwidthand port configuration) for an FPGA-based top-of-rack switchand, use our implementation, to provide an insight on which ofthese options is the best. We also propose an architecture fora rack-scale computer built on a printed circuit board (PCB) exploiting the FPGA-based switch.
In this paper a low power amplifier for bio-signal acquisition is described. The design takes benefit of UTBB-FDSOI 28nm technology and exploits bulk under the buried oxide as a second gate of FET device. This amplifier exhibits low supply current of 25nA, while keeping input noise at 24 µV in bio-signal frequency band. The gain of the amplifier is 71dB.
This work reports on the possibility to use gyroscopes based on piezoresistive NEMS gauges in vestibular implants. The specifications for this application are critically discussed, and used to derive parameters required at the sensor level and integrated circuit level. An algorithm to transform the acquired signals from the gyroscope reference system into the firing rate of vestibular nerves is also...
Although Network-on-Chips (NoCs) are fast becoming pervasive as the interconnect fabric for multicore architectures and systems-on-chips, they still suffer from excessive static and dynamic power consumption. High dynamic power consumption results from switching and storing data within routers/links while excess static power is consumed when routers and links are not utilized for communication and...
Energy efficient routers (EERs) are promising devices to achieve green communications for ISP to save energy and cost. However, deploying this kind of routers may introduce severe accumulated packet delay, especially for high-end optical routers. In this paper, we present three contributions to solve the above issue with dynamically balancing QoS and the energy consumption, while preserve the real...
Energy efficient router is one of the most important and promising devices in the roadmap towards green communication and networking. In recent years, automatical power scaling adapting with real-time network traffic in a router has been proved to be practical on real hardware, which is an implementation under the traffic aware philosophy. In this paper, we further explore this direction, and present...
This paper mainly focuses on low power based amplifier (LNA) design. These types of amplifier design are suitable for low power wireless applications. Here different types of low noise amplifier designs are considered for designing a front end receiver. LNA is used for impedance matching, amplify weak signal and eliminate the unwanted noise signal. Selecting proper circuit element, this delivers better...
Conventional Active-RC filters require large GB/ωο ratio to operate properly. This means a lot of power and band-width are wasted. We explore two alternative implementation types which are more GB/ωο efficient. Thus, a comparison between Active-R and Gm-C low pass filters is presented. For this purpose, a first order and a biquad low pass structure was implemented using both techniques; analysis an...
As the amount of digital data the world generates explodes, data centers and HPC systems that process this big data will require high bandwidth and high capacity main memory. Unfortunately, conventional memory technologies either provide high memory capacity (e.g., DDRx memory) or high bandwidth (GDDRx memory), but not both. Memory networks, which provide both high bandwidth and high capacity memory...
Owing to increasing demand of faster and larger DRAM system, the DRAM system accounts for a large portion of the total power consumption of computing systems. As memory traffic and DRAM bandwidth grow, the row activation and I/O power consumptions are becoming major contributors to total DRAM power consumption. Thus, reducing row activation and I/O power consumptions has big potential for improving...
The concept of heterogeneous networks and small cells is likely to be a key addition to the fifth generation (5G) wireless communication standard, the prospect of which has motivated 5G researchers to investigate the coverage and integration of various small cells. Heterogeneous networks with small cells offer key benefits such as high frequency reuse, huge data rates and low power consumption for...
Optical Network-on-Chip (NoC), offering the advantages of low energy consumption, high bandwidth, and low latency, is a promising solution for on-chip communications of multi-core systems. However, on-chip lasers, a key element in optical NoCs, are a dominant source of power consumption. In this paper, we propose dynamic laser power scaling (DLPS), a finegrained control strategy for minimizing laser...
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.