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This paper presents initial results for a novel 128-antenna massive Multiple-Input, Multiple- Output (MIMO) testbed developed through Bristol Is Open in collaboration with National Instruments and Lund University. We believe that the results presented here validate the adoption of massive MIMO as a key enabling technology for 5G and pave the way for further pragmatic research by the massive MIMO community...
Modern datacenters involve a rich mix of workloads, each of which puts forward different service-level objective, including high throughput, low latency, etc. Currently, most datacenters introduce statistical multiplexing technology and oversubscription to the network design for lowering the total cost, which can easily lead to the occurrence of network congestion (loss), especially when the network...
This paper presents a hardware architecture for the QR decomposition (QRD) of a complex-valued matrix based on Modified Gram-Schmidt (MGS) algorithm. A high throughput iterative-pipelined design is implemented, which achieves similar performance of a fully parallel-pipelined design, with a significant reduction in hardware usage. For a fixed-point Field Programmable Gate Array (FPGA) implementation...
To meet the performance and energy efficiency demands of emerging complex and variable workloads, heterogeneous manycore architectures are increasingly being deployed, necessitating operating systems support for adaptive task allocation to efficiently exploit this heterogeneity in the face of unpredictable workloads. We present SPARTA, a throughput-aware runtime task allocation approach for Heterogeneous...
To address the challenge of unprecedented growth in mobile data traffic, ultra-dense network deployment is a cost efficient solution to offload the traffic over some small cells. The overlapped coverage areas of small cells create more than one candidate access points for one mobile station. Signal strength based user association in IEEE 802.11 results in a significantly unbalanced load distribution...
Reliable and secure wireless communications is fundamental to connectivity between smarter gadgets and people. This is much more true in defence applications with its unique requirements and challenges. Broadly the data link requirements in defence applications are seen under two categories. One, robust fool-proof zero downtime data links for telemetry, command and control. Second, broad band data...
Motivated by the need for robust and high throughput communication with airborne platforms, a variable rate MIMO scheme that combines the D-BLAST architecture with per antenna spreading was proposed. This paper is focused on the experimental study of this approach. We developed a software defined radio implementation of the variable rate MIMO system based on GNU Radio. Over the air transmission and...
This paper proposes a novel architecture for last mile connectivity for rural India. This proposed architecture provides a low cost GSM connectivity using distributed Radio Access Network (RAN) architecture principle of Base Band Unit (BBU) and Remote Radio Unit (RRU), leveraging the existing National Optical Fibre Network (NOFN) infrastructure and deploying a WiFi based front-haul. The paper also...
Application performance on these processor array platforms is highly sensitive to how functionality is physically placed on the device, as this choice crucially determines communication latencies and congestion patterns of the on-chip inter-core communication. The problem of identifying the best, or just a good enough, partitioning and placement does not, in general, admit to an analytic solution,...
In this paper we propose an efficient hardware architecture for computation of matrix inversion of positive definite matrices. The algorithm chosen is LDL decomposition followed directly by equation system solving using back substitution. The architecture combines a high throughput with an efficient utilization of its hardware units. We also report FPGA implementation results that show that the architecture...
Research on network slicing for multi-tenant heterogeneous cloud radio access networks (H-CRANs) is still in its infancy. In this paper, we redefine network slicing and propose a new network slicing framework for multi-tenant H-CRANs. In particular, the network slicing process is formulated as a weighted throughput maximization problem that involves sharing of computational resources, fronthaul capacity,...
LDPC block codes (LDPC-BCs) have attracted great interests in recent years by highly parallel computation and good bit-error-rate performance, and one of the decoder implementation issues is high routing complexity. LDPC convolutional codes (LDPC-CCs) not only release routing complexity but also are natural to dynamic length of data frame. Thus, the codes are very suitable for video stream and pre-5G...
Energy consumption's increasing importance in scientific computing has driven an interest in developing energy efficient high performance systems. Energy constraints of mobile computing has motivated the design and evolution of low-power computing systems capable of supporting a variety of compute-intensive user interfaces and applications. Others have observed the evolution of mobile devices to also...
With the significant attention to information security, mobile terminals such as smartphone always be demand for integrating cryptographic processor. In this paper, a high-efficiency reconfigurable cryptographic processor is presented. Integrating small amounts of computing units designed by reconfigurable technology and developing instruction level parallelism of different operations in a block and...
Latency is key in today cellular networks. The latest 3GPP Release 14 includes a future work item to shorten the Transmission Time Interval of LTE networks from 1ms to 0.5ms in order to lower the overall system latency. Towards achieving such goal, this paper proposes a mechanism to reduce the latency of mobile cellular systems, while improving the throughput, by leveraging the benefits of the two...
The development of network services makes their requirements for bandwidth become higher and more various, which leads to difficulty in Quality of Service (QoS) guarantee. In this paper, an OpenFlow switch featuring Weighted Fair Queuing (WFQ) algorithm is proposed. The system is implemented into NetFPGA 1G board which utilizes Xilinx Virtex II Pro 50 technology. The results have shown that our circuit...
Micron's Automata Processor (AP) efficiently emulates non-deterministic finite automata and has been shown to provide large speedups over traditional von Neumann execution for massively parallel, rule-based, data-mining and pattern matching applications. We demonstrate the AP's ability to generate high-quality and energy efficient pseudo-random behavior for use in pseudo-random number generation or...
To satisfy more and more complicated requirements on information recording, processing, exchange etc. in newly developed intelligent satellites, a distributed storage system is designed based on SpaceWire network in satellite platform. In this distributed storage system, a SpaceWire router unit serving as the core device of star network connects several nodes, including onboard computers, namely,...
Nowadays, Software-Defined Networking (SDN) is a powerful architectural model, decoupling control and forwarding planes through the abstraction of network elements and functionalities. As known, in SDN networks the controller is the key element since the intelligence of the network is centralized. Hence, the deployment of network services, such as QoS, traffic engineering and traffic recovery, requires...
This paper quantifies the difference in resource demand between modern and classic NoC workloads. In the paper, we show that modern workloads are able to better utilize higher numbers of VCs and smaller C factors in order to attain performance and energy efficiency. This is because of the high throughput and possible local congestions in their traffic pattern. As a result, such workloads are more...
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