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Interactive and delay-sensitive applications constitute an important and growing part of the Internet. Today, low delays can only be achieved if there are no congested links along the path. At a bottleneck, the commonly used congestion control mechanisms induce high queuing delay and packet loss. Specialized congestion control mechanisms achieving a low queuing delay in an otherwise congested network...
Quality of Service (QoS) control is an important concept in computer networking, as it is related to end-user experience. While providing QoS guarantees over the Internet has long been deemed too complicated, the emergence of Software Defined Networking (SDN), and OpenFlow as its most popular standard, may facilitate QoS control. In this paper, we consider how to enable bandwidth guarantees with OpenFlow...
Multipath forwarding consists of using multiple paths simultaneously to transport data over the network. While most such techniques require endpoint modifications, we investigate how multipath forwarding can be done inside the network, transparently to endpoint hosts. With such a network-centric approach, packet reordering becomes a critical issue as it may cause critical performance degradation....
Software Defined Networking (SDN) has recently emerged as a new networking technology offering an unprecedented programmability that allows network operators to dynamically configure and manage their infrastructures. The main idea of SDN is to move the control plane into a central controller that is in charge of taking all routing decisions in the network. However, despite all the advantages offered...
This paper introduces a simple and effective model order reduction approach based on singular value decomposition (SVD) and aimed to electromagnetic transient (EMT) analysis. The proposed approach initially adopts a rational approximation obtained by the vector fitting (VF) software tool for an arbitrary frequency range. Then, it applies SVD-based truncation separately to low-frequency range and to...
The paper describes a management model where a service provider (SP) maintains multiple protocol modules to exercise the infrastructure resources (e.g., bandwidth, storage, servers) under various environment conditions. Each protocol depicts a distinctive work-flow among the networked entities (i.e., message exchanges and task coordination), incurring a certain amount of resource use. Different levels...
The proliferation of the wireless market has driven the demand for RF systems to dramatically increase functionality, frequency coverage, bandwidth, and efficiency; while simultaneously reducing power consumption and die size to save power and cost. For example, the highly complex RF systems in handset technology have seen a dramatic increase in frequency, operating bands, and complexity of signals...
With cloud tenants making greater use of cloud networking infrastructure in a shared manner, there is an increased desire for more efficient bandwidth reservation guarantees. In this paper, we catalog the varied attempts at solving this problem, and propose a novel proposal Bandwidth as a Service.
SpaceFibre [1][2][3] is the next generation of SpaceWire [4] on-board data-handling network technology for spaceflight operations, which runs over both electrical and fibre optic media. SpaceFibre has many benefits compared to SpaceWire, including much higher data-rates, integrated quality of service, fault recovery capabilities, multi-laning with graceful degradation and hot and cold redundancy,...
A proof-of-concept bandwidth and notch frequency tunable 3.25 Gs/s 4-Tap analog FIR filter is presented. A 6-b Split-capacitor DAC is introduced as a reconfigurable coefficient multiplier for frequency response adjustment. The proposed AFIR filter has been implemented in a 32nm SOI CMOS. The filter achieves capability of 240 ∼ 710 MHz low pass band tuning range and 0.54 ∼ 1.625 GHz notch frequency...
Network function virtualization (NFV) has drawn much attention in recent years, where some network functions that used to be deployed on specific hardware have become virtualized instances on general servers to achieve more scalability and flexibility. In a data center, service function chaining (SFC) makes a workflow traverse different network functions in a specific order to provide different levels...
Content Delivery Network (CDN) is an effective solution to offer reliable and efficient content provisioning across the Internet. In order to ensure the service experience, it is critical to adopt efficient routing and server selection techniques in CDN. However, traditional CDN is unable to possess global knowledge of whole network and therefore lacks the ability to dynamically control routing and...
Nowadays many IPTV services are deployed based on P2P structure for the sake of saving the cost of server equipment and bandwidth requirement. Since peers may join and leave the P2P system arbitrarily, it may cause the service quality unstable. In this paper, we compare IP addresses to find partner peers in proximity, and use specific packet pairs to probe partner peers that have larger bandwidth,...
A single-element of phased-array receiver front-end has been developed in 0.13µm CMOS for 26–29GHz application. This design uses the All-RF architecture with LNA and phase shifter blocks to achieve lowest NF, rms gain error and rms phase error. The 26–29GHz single-element achieves a post-simulation result NF of 6.5dB, rms gain error of 1.9dB, rms phase error of 7.5 degree at 27.5 GHz. The whole circuit...
Software Defined Networking (SDN) is a new networking paradigm that separates the network control plane from the packet forwarding plane. It provides the applications with an abstracted and centralized view of the distributed network state. This paper utilizes SDN for congestion awareness and traffic scheduling for the switch congestion control. For such a purpose, a traffic assignment optimization...
This paper presents a new encoding and corresponding decoding scheme to reduce crosstalk on a high-speed parallel bus. The scheme is based on a modified Fibonacci sequence and is introduced along with potential benefits in some upcoming memory interfaces. The scheme provides appreciable eye opening for interfaces dominated by crosstalk such as existing memory interfaces.
A modeling method to consider simulation switching noise of HBM and its impact on HBM timing is described. This method combines partial element equivalent circuit model for power delivery network and S-parameters based HBM channel model together in HBM studies.
The DARPA Arrays at Commercial Timescales (ACT) program seeks to lower the nonrecurring engineering costs and timeframe of designing and upgrading phased arrays through the use of a common hardware module that can be reused across many phased array missions and array sizes. The ACT program seeks to utilize elemental level digital beamforming to remove many of the fixed choices, e.g. array size, number...
The time-triggered principle establishes and maintains a system-wide synchronized time-base by the local clocks of the device. The proposed concept of Time-Triggered Ethernet (TTE) guarantees the determinacy of time-critical message for avionics and safety-critical systems. This paper presents an algorithm based on path-hop of tasks to generate a rational scheduling timetable to ensure is free of...
A stability-improved single operational amplifier third-order ΣΔ modulator by using a fully-passive noise shaping SAR ADC as a quantizer is presented in this paper. One operational amplifier is shared to realize 2nd order noise shaping and an additional 1st order noise shaping is realized by a fully-passive technique in the quantizer. An additional switch and capacitor path is introduced to the operational...
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