Performance Impact of LOS and NLOS Transmissions in Dense Cellular Networks under Rician Fading
In this paper, we analyse the performance of dense small cell network (SCNs). We derive analytical expressions for both their coverage probability and their area spectral efficiency (ASE) using a path loss model that considers both line-of-sight (LOS) and non-LOS (NLOS) components. Due to the close proximity of small cell ...
A Simple Framework for Cross-Layer Network Enhancements in Linux
The viability of cross-layer enhancements in computer networks has been discussed for many years. The case for cross-layer solutions usually lacks experimental validation in realistic deployments. Most researchers use simulation to validate their proposed solutions. We demonstrate a technique that we have been using to experiment with cross-layer solutions in ...
Joint Channel Access Mechanism and Scheduling Design and for Licensed Assisted Access System
We consider an Uplink License Assisted Access (LAA) system in which LTE systems compete transmission resources with WiFi systems. Before sending any signals, a listen-before-talk (LBT) process is mandated for LAA system: users are required to sense the environment and can only transmit if the channel is considered idle. To ...
Dymo: Dynamic Monitoring of Large Scale LTE-Multicast Systems - Research Report
- Abdelmalek Y.
- Bejerano Y.
- Gupta V.
- Gutterman C.
- Infante H.
- Raman C.
- Young T.
- Yu C.
- Zussman G.
LTE evolved Multimedia Broadcast/Multicast Service (eMBMS) is an attractive solution for video delivery to very large groups in crowded venues. However, deployment and management of eMBMS systems is challenging, due to the lack of realtime feedback from the User Equipment (UEs). Therefore, we present the Dynamic Monitoring (DyMo) system for ...
QoS-Aware Protection in Flexgrid Optical Networks
We propose a protection scenario for flexgrid networks whereby premium traffic survives fiber cuts with just-enough bandwidth. We demonstrate a proof-of-concept with a novel two-wavelength baud-rate-switchable optical terminal, which reconfigures in <1.9ms. We compute typical improved capacity usage of 250%.
Stokes Vector Communications Using Silicon Photonic Integrated Circuits
Multi-dimensional direct detection (DD) can increase the channel rate without the use of coherent detection, compared with traditional one-dimensional intensity modulation with DD. Recently, there is increasing interest in utilizing Stokes vector (SV) receiver, which is a DD technique with the capability to track the polarization changes in fibers and ...
A Case Study on Capturing and Visualising Face-to-Face Interactions in the Workplace
Face-to-face interactions have proven to accelerate team and larger organisation success. Many past research has explored the benefits of quantifying face-to-face interactions for informed workplace management, with little attention being paid to how this information is perceived by the employees. In this paper, we offer a reflection on the automated ...
Resolving Content Names in DNS: Does it scale?
Today, the replication of content or services over several strategically placed locations is a common method used by many service providers to improve performance and scalability. The user is redirected to the nearest server location, and this approach helps to reduce network impact on the response time of the user ...
Bigdata application overview
The paper describe the Big data development background briefly, introduce the basic big data platform architecture and primary principle, and then it give the big data development trend in the future.
Enabling ICN in IP networks via DNS Extensions: A Measurement Study
ICN promises benefits to users and service providers along several dimensions, including lower response time, nearest-replica routing, intrinsic content integrity without external network-level indicators, location-independent naming and improved support for mobility. However, these benefits come at non-trivial cost as many ICN proposals call for adding significant complexity to the network. ...
HiFi: A Hierarchical Filtering Algorithm for Caching of Online Video
Online video presents new challenges to traditional caching with over a thousand fold increase in number of assets, rapidly changing popularity of assets and much higher throughput requirements. We propose a new hierarchical filtering algorithm for caching online video: HiFi. Our algorithm is designed to optimize hit-rate, replacement rate and ...
Silicon Photonic Integrated Circuits for Coherent Communications in Metro Networks
We review silicon photonic integrated circuits for coherent communications in metro networks. These circuits include highly integrated dual-polarization in-phase/quadrature modulators, single-chip polarization-diversity receivers, and microring modulators for advanced modulation formats. The high-degree integration of silicon photonics leads to low-cost and compact coherent optical modules.
128-Gb/s 100-km Transmission with Direct Detection using Silicon Photonic Stokes Vector Receiver and I/Q modulator
We report a highly compact and monolithically integrated silicon photonic Stokes vector receiver. Paired with a silicon I/Q modulator with a power-tunable carrier in the orthogonal polarization, a transmission at 128-Gb/s over 100 km of fiber is achieved with direct detection.
QoE Inference for Video Services in Home Wi-Fi Networks
The operators strive to enhance home networks by focusing on customer experience. To this end, a notion of the customers quality-of-experience (QoE) is vital which was most of the time neglected in favor of quality-of-service (QoS). In this paper, we aim to close a significant gap between QoS and QoE ...
Cellular Engineering for the Remote-Controlled Delivery of Therapeutics
Stem cells have a number of useful properties, including their ability to proliferate, migrate and differentiate. For this reason, numerous clinical studies have utilized stem cell-based therapies for the treatment of various human diseases and disorders. An emerging area of interest lies in engineering cells to further enhance their innate ...
Hybrid Nano-Scaffolds for Neuroengineering
The mammalian brain is a phenomenal piece of organic machinery. While remarkable advances have been made to better understand how the brain works and how to overcome neural deficiencies, its inherent complexity makes it difficult to fully comprehend, repair and manipulate. This is partly due to the lack of adequate ...
Dynamic Path Selection in 5G Multi-RAT Wireless Networks
- Borst S.
- Calin D.
- Kaya A.
- Viswanathan H.
Emerging 5G networks will not only offer higher link rates, but also integrate a variety of Radio Access Technologies (RATs) in order to provide ultra-reliable broadband access to a wide range of applications with high throughput and low latency requirements. SDN enabled dynamic path selection is of critical importance in ...
UNO: Unifying Host and Smart NIC Offload for Flexible Packet Processing
Increasingly, Smart Network Interface Cards (sNICs) are used in data centers to partially offload networking functions from host processors thereby making these processors available for running tenant applications.Modern sNICs have fullyprogrammable, energy-efficient multi-core processors on which many packet processing functions including a full-blown software switch (e.g., Open vSwitch) can run. ...
Delay versus Stickiness Violation Trade-offs for Load Balancing in Large-Scale Data Centers
Load balancing provides a key mechanism for achieving efficient resource allocation in data centers, ensuring high levels of server utilization and robust application performance. The load balancing techniques implemented in current data centers tend to rely on mapping packets to a server IP address through a hash value calculated from ...
Improving End to End Energy Efficiency in Network Function Virtualization
Network Function Virtualization (NFV) is a new paradigm of virtualizing the services provided by the telecom and cloud operators. NFV is one of the hottest research areas in the field of computer networking. Given one or more service deployed on the virtual machines, the goal is to find a solution ...