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The paper presents a high-speed serial interface between external tester and Embedded Deterministic Test (EDT) compression logic hosted by SoC designs. With only a single bidirectional link, the system is capable of feeding distributed heterogeneous cores with hundreds of test channels. Moreover, it synergistically supports EDT bandwidth management to improve the overall test performance. A detailed...
In high bandwidth and low latency data center networks, when multiple data senders simultaneously communicate with a single receiver, namely in many-to-one communication pattern, it is frequently occurred that the burst data overload the receiver's switch buffers, which leads to TCP throughput collapse. This phenomenon is termed to TCP Incast problem, which has become a new hot research topic in recent...
Key-Value Stores (KVStore) are being widely used as the storage system for large-scale Internet services and cloud storage systems. However, they are rarely used in HPC systems, where parallel file systems (PFS) are the dominant storage systems. In this study, we carefully examine the architecture difference and performance characteristics of PFS and KVStore. We propose that it is valuable to utilize...
We propose a cross-layer sensor network architecture to convert measurements acquired by a population of sampling devices, into synchronous sensor array measurements, using a network synchronization protocol that is inspired by the dynamics of pulse coupled oscillators (PCO). We study the specific application of these sensors in the distribution section of the Smart Grid as low cost Phasor Measurement...
In expanding the vision of an all-digital SATCOM terminal, the CERDEC Space & Terrestrial Communications Directorate (S&TCD) sponsored a digital-IF working group focused on creating a core digital IF architecture for strategic SATCOM terminals and defining a series of modular open standard digital interfaces (OSDI). This paper describes that Future Advanced SATCOM Technology (FAST)...
Nowadays, mobile applications/devices have become the trends, especially, when they were gradually shifted from basic communication services to supporting more sophisticated service provisioning. Mobile applications are usually very light, are nowadays likely to be often connected to the Internet, and can be used quite easily. However, these applications exhibit some challenges related to limited...
A photo-electron detection system with 32 PIN photodiodes in 1D array has been designed and implemented within 16cm width. There are mainly two parts in this system: the photodiode frontend with weak signal modulation and sampling, the signal processing backend with parallel signal processing and data transfer. The weak current signal of 32 PIN photodiodes' output is first amplified for about 104...
This paper demonstrates the use of open source hardware and software to implement the digital back end of a network of radars. i.e. RHINO platform - a highly capable reconfigurable platform serving both digitisation / synthesis and packetisation functions for a dual X and L band radar. The system is capable of arbitrary waveform generation for transmit, and can be configured at runtime and reprogrammed...
Evolved Multimedia Broadcast Multicast Service (eMBMS) is used for efficient content delivery to multiple users in Long Term Evolution (LTE) networks. In most cases eMBMS allows to use radio resources more efficiently comparing to unicast content delivery. It will be shown in this paper how many users should receive the same content to activate broadcasting instead of unicast delivery.
TCP Cubic is designed to better utilize high bandwidth-delay product paths in IP networks. It is currently the default TCP version in the Linux kernel. Our objective in this work is to better understand the performance of TCP Cubic in scenarios with a large number of competing long-lived TCP flows, as can be observed, e.g., in cloud environments. In such situations, Cubic connections tend to synchronize...
Over the last few years, the importance of cloud services for file synchronization has been increasing. With the release of network enabled cameras like Google Glass the trend of synchronizing new photos with the cloud has emerged as an important new use case for mobile networks. Multiple stakeholder are interested in optimizing this synchronization process according to different orthogonal metrics...
Synchronization with the grid voltage is critical in the control of grid-connected converters Under unbalanced grid condition, the conventional synchronous reference frame PLL (SRF-PLL) does not work well due to the effect of the fundamental negative sequence component. This paper proposes a new synchronization method, which incorporates a sinusoidal amplitude integrator (SAI) into the conventional...
A single loop low tracking jitter pixel clock generator is demonstrated in 28nm CMOS process. The proposed architecture only consists of a conventional single loop wide bandwidth fractional-N PLL and two synchronization skills which suppress the tracking jitter and bring out the delay control function like a DLL. When a 250MHz pixel clock is generated and synchronized with a 10kHz HSYNC, the measured...
Validation is highly important in parallel application simulations with a large number of parameters, a process that can vary depending on the structure of the simulator and the granularity of the models used. Common practice involves calculating the percentage error between the projected and the real execution time of a benchmark program. However, this coarse-grained approach often suffers from a...
Adoption of virtualization technology has been limited in industrial automation due to unavailability of mature solutions, and strict timing requirements of control systems. However, current advancement in Virtual Monitoring Machine, multicore technology, virtualization extension and network virtualization has led to increased interest of virtualization in industrial automation. So far, many related...
Adaptive video delivery approaches perform video rate selection based on the streaming client's throughput estimate. In practice, the accuracy of the estimated throughput is limited due to feedback delay and the unawareness of the dynamics of the underlying HTTP/TCP transport layer. As a result, streaming applications employ large playback delays in the order of tens of seconds so as to maintain continuous...
In this paper we propose a flexible and scalable distributed storage framework called flex Store that can adapt to variations in available or consumable power and demonstrate its performance in the context of reduplicated virtual machine disks. We propose and investigate smart control techniques in order to cope with the power constraints either introduced as a result of increasing node density in...
With the increasingly widespread application of cloud computing, multiple cloud storage platforms have emerged, such as Dropbox, GoogleDrive, OneDrive, etc. These synchronization technology tools are based on specific platform and vary in time synchronization, bandwidth, file types and working offline synchronization capabilities. Most of them are facing time delay, bandwidth overhead problems. Based...
Large bandwidth is indispensable for future high-speed wireless transmission. However, implementation of traditional receiver demands ultra-high-speed ADC to receive large-bandwidth signals, which is challenging for current manufacturing. Motivated to defeat this challenge, we propose STTGR, which is literally extracted from stitching-together receiving. STTGR is a bandwidth extension receiving scheme...
The past few years have witnessed debate on how to improve link utilization of high-speed tiny-size buffer routers. Widely argued proposals for TCP traffic to realize acceptable link capacities mandate: (i) over-provisioned core link bandwidth; and (ii) non-bursty flows; and (iii) tens of thousands of asynchronous flows. However, in high speed access networks where flows are bursty, sparse and synchronous,...
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