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
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 ...
Virtualizing Network Services & Cloud Reliability
In a communications network, several physical appliances are used to manage and operate the network. A few examples of these appliances are equipment used as load balancers, firewalls and intrusion detection systems. With the advance of virtualization and cloud computing, these physical appliances are being replaced by virtual servers, in ...
Large-scale Measurement and Analysis of Cloud Service Reliability
Given the growth and our increasing reliance on cloud services, it is crucial that we have a better understanding of the reliability of cloud services. Today, a cloud service is composed of a complex array of building blocks and any of the building blocks can fail. Prior empirical studies on ...
SDN Application Perils: Analytics-Enhanced Automated Verification for Reliability, Performance & Security
- Jagadeesan L.
- Mendiratta V.
Software-defined networking (SDN) enables networks to be programmed and dynamically modified through software-based network applications and services. Applications can be deployed into operational SDN networks, replacing middle-boxes, and have tremendous power to impact and potentially compromise network behaviors, significantly affecting network reliability, performance, and security. To protect SDN networks, it ...
Wireless Strategies Beyond WiFi for Fixed Network Service Providers
- Dhingra V.
- Glapa M.
- Krishnan Y.
- Patil G.
Fixed access network service providers are witnessing increasing competition in their TV and broadband businesses. In response, many MSOs have started offering residential, enterprise and WiFi hotspots as a value-added service and as an enabler for churn reduction. Some MSOs, such as Cablevision, are using their WiFi footprint to launch ...
A digital ecosystem for smart energy - Into a specification-driven data streaming world
- Roelands M.
These slides, to an invited panel talk at EPIA'17, introduce a horizontal streaming service platform approach based on Bell Labs World Wide Streams, extended with a service specification compiler and world model concept. As per the topic of the session where this is to be presented, the talk applies this ...
A 36.4dB SNDR @ 5GHz 1.25GS/s 7b 3.56mW SAR ADC Using Switch-Bootstrapping, Unit-Switch-Plus-Cap DAC and Triple-Tail Comparator in 28nm Bulk CMOS
- Ramkaj A.
- Steyaert M.
- Strackx M.
- Tavernier F.
A 1.25GS/s 7b single-channel SAR ADC is presented with an SNDR/SFDR of 41.4dB/51dB at low frequencies, while the SNDR/SFDR at Nyquist are 40.1dB/52dB and are still 36.4dB/50.1dB at 5GHz. The high input frequency linearity is enabled by a fast bootstrap circuit for the input switch, while the high sampling rate, ...
A 7b 1.25GS/s 3.8mW Single-Channel SAR ADC with a Triple-Tail Comparator, Improved T/H and Unit-Switch-Plus-Cap-DAC achieving 36.4dB SNDR at 5GHz Input Frequency
- Pelgrom Marcel
- Ramkaj A.
- Steyaert M.
- Strackx M.
- Tavernier F.
To support continuous bandwidth growth of next-generation high-speed serial links, moderate-resolution energy-efficient gigahertz-sampling-rate ADCs are highly demanded. SAR ADCs bare an excellent power-efficiency due to their highly digitized nature, allowing them to scale proficiently into deep-submicron nodes. Several techniques have been presented recently to increase SAR speed such as capacitive ...
IMS shared streaming video
- Gaglianello R.
- Liu D.
This paper describes the design, architecture and implementation of an IP Multimedia Subsystem (IMS) shared streaming video (SSV) application that executes within the framework of the Lucent Techologies' 3rd Generation Partnership Project (3GPP) IMS services architecture. IMS being only one of several standards for creating applications, we will use the ...
The development of the wireless intelligent network (WIN) and its relation to the international intelligent network standards
- Faynberg I.
- Gabuzda L.
- Jacobson T.
- Lu H.
This paper summarizes the current International Telecommunication Union â Telecommunication Standardization Sector (ITU-T) intelligent network (IN) standards in the context of the wireless intelligent network (WIN) and relevant parts of the ANSI-41 family of standards developed in the United States. In addition, this paper outlines the concepts on which the ...