- Kanizo Y.
- Rottenstreich O.
- Segall I.
- Yallouz J.
Enabling functionality in modern network is achieved through the use of middleboxes. Middleboxes suffer from temporal unavailability due to various reasons, such as hardware faults. We design a backup scheme that takes advantage of Network Function Virtualization (NFV), an emerging paradigm of implementing network functions in software, deployed on commodity ...
- Caggiani Luizelli M.
- Raz D.
- Saar Y.
Network Function Virtualization (NFV) is a novel paradigm that enables flexible and scalable implementation of network services on cloud infrastructure. One of the key factors in the success of NFV is the ability to dynamically allocate physical resources according to the actual demand. Yet, orchestrating service chains that require high ...
- Navratil D.
- Prasad A.
- Saily M.
- Uusitalo M.
In the recent past, with the ubiquitous adoption of smartphones and tablets, there has been an exponential increase in data rate demands which has increasingly challenging for network operators to support. This trend is expected to continue in future, with the advent of high-performance gaming and increasing appetite for immersive ...
Although QoE evaluation methodologies for human communication services in mobile networks â" such as voice and video streaming â" are a widely researched topic, several challenges remain yet unresolved including industry-agreed definitions of end-to-end performance indicators. With 5G, a wide variety of new use cases and diverse services shall be ...
Energy consumption in mobile networks rises with increase in cell density. This trend will only continue in the future multi-layer 5G-related Ultra-Dense Networks (UDN) that are characterized by high number and density of cells in multiple radio technologies each in one or more layers. Several Energy Saving Management (ESM) solutions ...
Non-orthogonal multiple access (NOMA) is an effective means to improve the spectral efficiency of a wireless communication system. When applied to cellular networks, cell edge users may suffer from low bit rate, or the associated base stations may need to use excessively high power to serve those users. In order ...
We study the performance of time-of-arrival (ToA) localization for an indoor office environment. We transmit 10MHz and 100MHz waveforms over the 5.8GHz ISM band and measure complex I-Q samples using precisely calibrated and synchronized channel sounding equipment in line-of-sight (LOS) and non- line-of-sight (NLOS) channels. The ToA is estimated using ...
Future wireless networks envision ultra-reliable, ultra-low latency communication with efficient use of the limited wireless channel resources. Closed-loop retransmission protocols, such as automatic repeat request (ARQ), where retransmission of a packet is enabled using a feedback channel has been adopted since early days of wireless telecommunication to achieve the required ...
In this paper, a wireless cellular network based indoor localization approach is presented. During the training stage, the mobile device initializes a positioning request. The surrounding Base Stations (BSs), which are typically equipped with massive antenna array elements, can measure the Angle of Arrival (AoA) of the positioning request signal. ...
End-to-end packet latency is a defining component of the Quality of Experience (QoE) delivered to end users by interactive network applications. The tight latency requirements of those applications may be violated when they share packet buffers with elastic applications that use greedy TCP sources for end-to-end transport. The accumulation of ...
Future indoor networks need to provide broadband services either by increasing bandwidth, higher order modulations and high spatial reuse. To this end, ultra-dense Wi-Fi networks need to be deployed. This work discuss design principles of ultra-dense gigabit Wi-Fi networks through proper bandwidth selection, adaptive CCAs. We present power control management ...
Real world home blood pressure variability in over 56,000 individuals with nearly 17 million measurements
- Kim K.
- Nikzad N.
- Normand A.
- Quer G.
- Schmidt N.
- Steinhubl S.
- Topol E.
- Vegreville M.
- Wineinger N.
© American Journal of Hypertension, Ltd 2017. All rights reserved. BACKGROUND: Using the data from 56,365 individuals, from 185 countries, and a Nokia Health Wireless blood pressure (BP) monitor, we investigated real-world characteristics of BP variability (BPV). METHODS: All included individuals self-measured and uploaded their BP using Bluetooth at least ...
An Enhanced Selected Mapping Technique for Joint PAPR Reduction and Impulsive Noise Suppression in Multi-Carrier Powerline Communications Systems
- Gacanin H.
- O. Muta
- T. Kageyama
In power line communication (PLC) systems using multi-carrier modulation such as orthogonal frequency division multiplexing (OFDM), reduction of peak-to-average power ratio (PAPR) of OFDM signal and mitigation of the influence of impulsive noise are challenging problems. To deal with these problems in PLC-OFDM systems, this paper proposes an enhanced selected ...
Ultra-reliable low-latency communications (URLLC) have the potential to enable a new range of applications and services: from wireless control and automation in industrial environments, to self-driving vehicles. The fifth generation (5G) wireless systems are faced by different challenges for supporting URLLC. Some of the challenges, particularly in downlink direction, are ...
- Hamidouche L.
- Iskounen S.
- Mathieu F.
- Monnet S.
- Nguyen T.
Mobile cloud is changing the way to enroll teaching activities in university campus. Lectures and lab sessions can be carried out directly from tablets in a class room by accessing a server in the cloud. In this paper, we address the problem of high density cloud access with wireless devices ...
- Gong Y.
- Liu X.
- Lu W.
- Peng H.
- Wu J.
Smart city is able to make the city source and infrastructure more efficiently utilized, which improves the quality of life for citizens. In this framework, wireless sensor networks (WSNs) play an important role to collect, process, and analyze the corresponding information. However, the massive deployment of WSNs consumes a significant ...
- Ai B.
- Chen X.
- Guan H.
- Ma G.
- Wang F.
- Zhao Z.
- Zhong Z.
Future IoT applications provoke the connectivity and reliability requirements of machine-type communications, which yield mMTC and URLLC, respectively. In mMTC, grant-free NOMA is adopted to serve massive machine-type devices with low signaling overhead. The challenge of grantfree NOMA for mMTC is the collision induced by non-orthogonal resource allocation. Various grantfree ...
Channel estimation and throughput evaluation for 5G wireless communication systems in various scenarios on high speed railways
- He R.
- Wang G.
- Wang X.
- Zhao Y.
- Zhao Z.
- Zou Y.
The fifth generation (5G) wireless communication is currently a hot research topic and wireless communication systems on high speed railways (HSR) are important applications of 5G technologies. Existing studies about 5G wireless systems on high speed railways (HSR) often utilize ideal channel parameters and are usually based on simple scenarios. ...
Synchronous networks-on-chip (NoC) require tailored schedulers achieving low latency, high throughput, and fairness while avoiding packet collisions. Efficient schedulers exist for rearrangeable non-blocking NoC. However, NoCs fabricated in integrated photonics typically suffer a blocking behavior due to the limitations of the switching capabilities in the space and wavelength domains. This ...
In massive multiple input multiple output (MIMO) systems operating in time division duplex (TDD), users connected to different base stations (BSs) transmit uplink (UL) pilot sequences to allow channel estimation for both UL and downlink (DL) directions. The ongoing standardization activity around the fifth generation (5G) of communication systems is ...