Study on the Idle Mode Capability with LoS and NLoS Transmissions

  • Guoqiang Mao
  • Lopez-Perez D.
  • Ming Ding
  • Zihuai Lin

In this paper, we study the impact of the base station (BS) idle mode capability (IMC) on the network performance in dense small cell networks (SCNs). Different from existing works, we consider a sophisticated path loss model incorporating both line-of-sight (LoS) and non-line-of-sight (NLoS) transmissions. Analytical results are obtained for ...

Advanced Split-TCP with End-to-End Protocol Semantics over Wireless Networks

  • Calin D.
  • Kim B.
  • Lee I.

The worldwide mobile traffic is growing rapidly and more than 90% of the internet traffic relies on the Transmission Control Protocol (TCP) protocol, which is known to have a poor performance over unreliable wireless networks. One of the promising TCP enhancement mechanisms that are being considered by the wireless network ...

28 GHz and 3.5 GHz Wireless Channels: Fading, Delay and Angular Dispersion

  • Calin D.
  • Kaya A.
  • Viswanathan H.

We employ a ray tracing framework to extract the three dimensional (3D) channel parameters characterizing outdoor small cell deployments providing services to indoor users close to the exterior wall and windows at 28 GHz and 3.5 GHz. The wireless channel is highly dependent on 3D antenna patterns, the environment specific ...

On the Hyperbolicity of Large-Scale Networks

  • Kennedy W.
  • Narayan O.
  • Saniee I.

Through detailed analysis of scores of publicly available data sets corresponding to a wide range of large-scale networks, from communication and road networks to various forms of social networks, we explore a little-studied geometric characteristic of real-life networks, namely their hyperbolicity. In smooth geometry, hyperbolicity captures the notion of negative ...

LAPRA: Location-aware Proactive Resource Allocation

  • Muppirisetty S.
  • Wymeersch H.
  • Yiu S.

Today's indoor wireless networks employ reactive resource allocation methods to provide fair and efficient usage of the communication system. However, their reactive nature limits the quality of service (QoS) that can be offered to the user locations within the environment. In large crowded places (airports, conferences), networks can get congested ...

Lattice Partition Multiple Access: A New Method of Downlink Non-Orthogonal Multiuser Transmissions

  • Claussen H.
  • Ding Z.
  • Fang D.
  • Geraci G.
  • Huang Y.
  • Shieh S.

In this paper, we propose a new downlink non-orthogonal multiuser superposition transmission scheme for future 5G cellular networks, which we refer to as the lattice partition multiple access (LPMA). In this proposed design, the base station transmits multilevel lattice codes for multiple users. Each user's code level corresponds to a ...

Reconciling Resource Abstraction, Allocation and Routing Optimization

  • Colle D.
  • Demeester P.
  • Papadimitriou D.

Resource abstraction aims at enabling flexible allocation of capacity to serve demands by aggregating physical resources taken out of distributed resource pools accessible via dedicated gateways. This paradigm sits at the heart of many networking models including resource virtualization and other cloud computing. In this paper, we show this generic ...

Coordinated Hybrid Beamforming for Millimeter Wave Multi-User Massive MIMO Systems

  • Song N.
  • Sun H.
  • Yang T.

Massive Millimeter Wave (mmWave) Multiple Input Multiple Output (MIMO) systems utilize hybrid beamforming techniques to alleviate the implementation complexity of combining a large number of antennas. To solve the optimization problem in the hybrid design supporting multiple users and multiple data streams per user, we first propose a coordinated Radio ...

ColdSel: A Selection Algorithm to Mitigate Congestion Situations over Nanosatellite Networks

  • Cello M.
  • Marchese M.
  • Patrone F.

Nanosatellites offer a solution to provide Internet access in areas where there is no ICT infrastructure, such as rural and remote areas, keeping low construction and maintenance costs. A nanosatellite constellation is composed of a certain number of nanosatellites distributed in one or more orbital planes. In most cases, this ...

Fiber Nonlinearity Mitigation of WDM-PDM QPSK/16-QAM Signals using Fiber-Optic Parametric Amplifiers based Multiple Optical Phase Conjugations

  • Gnauck A.
  • Hu H.
  • Jopson R.
  • Randel S.
  • Sethumadhavan C.

We demonstrate fiber nonlinearity mitigation by using multiple optical phase conjugations (OPCs) in the WDM transmission systems of both 8 × 32-Gbaud PDM-QPSK channels and 8 × 32-Gbaud PDM-16-QAM channels, showing improved performance over a single mid-span OPC and no OPC in term of a nonlinear threshold and a best ...

Challenges in Time Transfer using the Network Time Protocol (NTP)

  • Sommars S.

Successful time transfer between a network time protocol (NTP) server and client relies on symmetric network delays and accurate, well-behaved NTP servers. NTP network delays and stratum 1 server performance were monitored for several years from multiple clients located in the U.S. Several patterns of asymmetric delay and loss were ...

Higher-Order Modulation Formats - Concepts and Enabling Devices

  • Buchali F.
  • Idler W.

The book chapter reviews the current status of concepts and enabling devices for higher order modulation formats in optical transmission, comprised in current and future coherent transceivers: DP-MQAM formats are generated with transmitter DSP, DACs and I/Q modulators and received with a coherent receiver frontend followed by ADCs and DSP

Optimal Path Encoding for Software-Defined Networks

  • Hari A.
  • Niesen U.
  • Wilfong G.

All packet networks need to maintain state in the form of a expensive, high speed packet forwarding table at each switch. The cost of maintaining and updating this table increases as networks grow and as the table becomes more granular in order to support ever more sophisticated per flow routing, ...

On Energy Efficiency in Bi-directional Powerline Communication Systems

  • Adebisi B.
  • Gacanin H.
  • Ligata A.

Powerline communication (PLC) systems have been used to enable broadband home applications such as high definition television (HDTV). However, the massive deployment of these devices has triggered the discussion on high energy consumption. Thus, a ”green” PLC systems are attractive solution to reduce the energy consumption especially in large deployments. ...

Energy Efficiency of Multiuser Multiantenna Random Cellular Networks With Minimum Distance Constraints

  • Du B.
  • Ge X.
  • Li Q.
  • Michalopoulos D.

Compared with conventional regular hexagonal cellular models, random cellular network models resemble real cellular networks much more closely. However, most studies of random cellular networks are based on the Poisson point process (PPP) and do not take into account the fact that adjacent base stations (BSs) should be separated with ...

Statistical prioritization for software product line testing: an experience report

  • Cordy M.
  • Devroey X.
  • Heymans P.
  • Legay A.
  • Perrouin G.
  • Samih H.
  • Schobbens P.

Software product lines (SPLs) are families of software systems sharing common assets and exhibiting variabilities specific to each product member of the family. Commonalities and variabilities are often represented as features organized in a feature model. Due to combinatorial explosion of the number of products induced by possible features combinations, ...

Mask effect in nano-selective-area-growth by MOCVD on thickness enhancement, indium incorporation, and emission of InGaN nanostructures on AlN-buffered Si(111) substrates

  • Bonanno P.
  • Decobert J.
  • El Gmili Y.
  • Li X.
  • Ougazzaden A.
  • Patriarche G.
  • Pradalier C.
  • Puybaret R.
  • Salvestrini J.
  • Sundaram S.
  • Voss P.

In this paper, we studied the effect of temperature and mask margin size on optical emission and growth rate enhancement (GRE) of InGaN grown by metal organic chemical vapor deposition (MOCVD) and nano-selective-area growth (NSAG) on AlN-buffered Si(111). For all mask geometries and temperatures, NSAG produced 90% single-crystal InGaN nanopyramids ...

Wide-Area Wirelss Communication Challenges for the Internet of Things

  • Dhillon H.
  • Huang H.
  • Viswanathan H.

The deployment of Internet of Things (loT) devices and services is accelerating, aided by ubiquitous wireless connectivity, declining communication costs, and the emergence of cloud platforms. Most major mobile network operators view machine-to-machine (M2M) communication networks for supporting loT as a significant source of new revenue. In this article, we ...

Coding for Caching in 5G Networks

  • Barone D.
  • Fadlallah Y.
  • Gorce J.
  • Llorca J.
  • Tulino A.
  • Vettigli G.

One of the major goals of the 5G technology roadrnap is to create disruptive innovation for the efficient use of the radio spectrum to enable rapid access to bandwidth-intensive multimedia services over wireless networks. The biggest challenge toward this goal lies in the difficulty in exploiting the multicast nature of ...

Graphene-based mid-infrared room-temperature pyroelectric bolometers with ultrahigh temperature coefficient of resistance

  • Borini S.
  • Bruna M.
  • Colli A.
  • De Fazio D.
  • Ferrari A.
  • Koppens F.
  • Lidorikis E.
  • Nanot S.
  • Parret R.
  • Sassi U.
  • Zhao Z.

There is a growing number of applications demanding highly sensitive photodetectors in the mid-infrared. Thermal photodetectors, such as bolometers, have emerged as the technology of choice, because they do not need cooling. The performance of a bolometer is linked to its temperature coefficient of resistance (TCR, similar to 2-4% K-1 ...