Over-The-air tests of high-speed moving LTE users in a reverberation chamber

© 1967-2012 IEEE. High-speed trains are nowadays a reality in most of the countries. Internet services and connectivity are required by the passengers on board using smartphones and laptops. Nevertheless, the higher the speed, the bigger the issues that operators have to face to implement mobility and to reduce the ...

Balancing the migration of virtual network functions with replications in data centers

  • Carpio F.
  • Jukan A.
  • Pries R.

The Network Function Virtualization (NFV) paradigm is enabling flexibility, programmability and implementation of traditional network functions into generic hardware, in form of the so-called Virtual Network Functions (VNFs). Today, cloud service providers use Virtual Machines (VMs) for the instantiation of VNFs in the data center (DC) networks. To instantiate multiple ...

On the development of IoT systems

A typical IoT system consists of four distinct architectural elements: devices, gateways, cloud and apps. All these elements require special skills in their development. In order to write safe, secure IoT systems, developers must be trained and experienced in four different areas of software development: embedded, cloud, web and mobile. ...

Avoidance of Improper Configuration Based on Self-Operation

  • Kylliainen J.
  • Raisanen V.
  • Stenberg K.
  • Tang H.

Self-operation has been proposed to reduce operational expenditure and complexity; one technique that may be applied concerns automation based on lessons from past experiences. This paper provides a solution for self-operation to learn the experiences of improper configurations and their associated network contexts. When receiving a new configuration request, self-operation ...

Equal-volume quantization of mobile network data using bounding spheres and boxes

  • Ali-Tolppa J.
  • Carle G.
  • Kajo M.
  • Schultz B.

Mobile network management systems often utilize quantization algorithms for abstraction and simplification of information, to be later processed by human operators or automated functions. In use cases such as visualization of high dimensional data or processing of anomalous observations, the off- the-shelf algorithms might produce misleading results, without the user ...

Balancing the migration of virtual network functions with replications in data centers

The Network Function Virtualization (NFV) paradigm is enabling flexibility, programmability and implementation of traditional network functions into generic hardware, in form of the so-called Virtual Network Functions (VNFs). Today, cloud service providers use Virtual Machines (VMs) for the instantiation of VNFs in the data center (DC) networks. To instantiate multiple ...

Ride: A Resilient IoT Data Exchange Middleware Leveraging SDN and Edge Cloud Resources

  • Benson K.
  • Kim Y.
  • Venkatasubramanian N.
  • Wang G.

Internet of Things (IoT) deployments rely on data exchange middleware to manage communications between constrained devices and cloud resources that provide analytics, data storage, and serve user applications. In this paper, we propose the Resilient IoT Data Exchange (Ride) middleware that enables resilient operation of IoT applications despite prevalent network ...

iNEMI project on process development of BiSn-based low temperature solder pastes: Part III: Mechanical shock tests on POP BGA assemblies

  • Aspandiar R.
  • Byrd K.
  • Chen J.
  • Chen Q.
  • Cheng S.
  • Coyle R.
  • Feng S.
  • Fu H.
  • Krmpotich M.
  • Mokler S.
  • Radhakrishnan J.
  • Ribas M.
  • Sandy-Smith B.
  • Tang K.
  • Wu G.
  • Zhang A.
  • Zhen W.

Lowering peak reflow temperature from the current 240°C+ level for SnAgCu (SAC) solder paste during the assembly of electronic board products has economic, environmental and technical benefits. The Bi-Sn solder system is one low melting metallurgical system of interest, but the inherent brittleness of bismuth is its major drawback. Recently, ...

Optimizing Data Plans: Usage Dynamics in Mobile Data Networks

As the U.S. mobile data market matures, Internet service providers (ISPs) generally charge their users with some variation on a quota-based data plan with overage charges. Common variants include unlimited, prepaid, and usage-based data plans. However, despite a recent flurry of research on optimizing mobile data pricing, few works have ...

Designing Optimal Middlebox Recovery Schemes with Performance Guarantees

  • 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 ...

Distributed energy saving management in multi-layer 4G/5G ultra-dense networks

  • Ali-Tolppa J.
  • Mwanje S.

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 ...

Channel measurements and preliminary performance results for indoor time-of-arrival localization

  • Geng C.
  • Huang H.
  • Latinovic Z.

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 ...

Backwards Composite Feedback for Configurable Ultra-Reliability of Retransmission Protocols

  • Khosravirad S.
  • Viswanathan H.

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 ...

Dynamic Control of RLC Buffer Size for Latency Minimization in Mobile RAN

  • Francini A.
  • Rajeev Kumar
  • Sharma S.
  • Shivendra Panwar

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 ...

Design Principles for Ultra-dense Wi-Fi Deployments

  • Gacanin H.
  • Ho L.

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 ...

LEAP: A latency control protocol for multi-path data delivery with pre-defined QoS guarantees

  • Chiariotti F.
  • Claussen H.
  • Kucera S.
  • Zanella A.

Wireless Gigabit networks based on the 5G New Radio and WiGig standards are expected to enable new throughput-intensive applications such as Virtual/Augmented Reality, high-resolution video chats, and remote control of unmanned terrestrial and aerial vehicles. However, the interactive nature of such applications implies the need for reliable and timely delivery ...

Network slices for vertical industries

Network Slicing allows to simultaneously support the specific needs of vertical industries with a diverse range of networking and computing requirements. Network Functions Virtualization (NFV) has been defined to deploy multiple network services on a common infrastructure. We extend the NFV concept to vertical services, i.e. services implemented on top ...

Positioning of high-speed trains using 5G new radio synchronization signals

We study positioning of high-speed trains in 5G new radio (NR) networks by utilizing specific NR synchronization signals. The studies are based on simulations with 3GPP-specified radio channel models including path loss, shadowing and fast fading effects. The considered positioning approach exploits measurement of Time-Of-Arrival (TOA) and Angle-Of-Departure (AOD), which ...

Average downlink SINR model for 5G mmWave networks with analog beamforming

Millimeter-wave frequency bands enable the deployment of small-sized antenna arrays in the fifth generation of mobile networks, which provide high beamforming gain for both transmitter and receiver. In order to study user mobility, a computationally efficient simulator is needed that runs with a time step resolution that is higher than ...

Performance analysis of uplink massive MIMO networks with a finite user density

In this paper, we conduct performance analysis for uplink (UL) massive multiple input and multiple output (mMI-MO) networks using stochastic geometry. With the consideration of practical system assumptions, such as sophisticated path loss model incorporating both line-of-sight (LoS) and non-line-of-sight (NLoS) transmissions and a finite user equipment (UE) density, we ...