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Power is quickly becoming a first class resource management concern in HPC. Upcoming HPC systems will likely be hardware over-provisioned, which will require enhanced power management subsystems to prevent service interruption. To advance the state of the art in HPC power management research, we are implementing SLURM plugins to explore a range of power-aware scheduling strategies. Our goal is to...
In this paper, we propose a new energy efficient strategy for 802.11ac networks. 802.11ac uses multi-user MIMO (MU-MIMO) technique for throughput enhancement. When multiplexing spatial streams of different lengths, 802.11ac pads additional bits for shorter streams to equalize the sizes of all streams. The padding method incurs redundant energy consumption for a receiver while listening useless data...
Network-on-Chip (NoC) has been proposed as the communication paradigm for the Ultra Large-Scale Integration System-on-Chips. One of the key factors that determine the performance and the implementation cost of a NoC is the switching scheme. In this paper, we propose and implement a hybrid switching router based on the combination of wormhole and virtual cut-through switching schemes. The router is...
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...
All the cores of a many-core chip cannot be active at the same time, due to reasons like low CPU utilization in server systems and limited power budget in dark silicon era. These free cores (referred to as bubbles) can be placed near active cores for heat dissipation so that the active cores can run at a higher frequency level, boosting the performance of active cores and applications. Budgeting inactive...
Early estimation of the peak power consumption of a system under development is crucial in assessing the design's reliability and thermal profile, and for benchmarking various architectural options and chip-level power management features. In this paper, we present a versatile power-virus generation technique for Networks-on-Chip (NoC), which allows the designer to quantify the realistically attainable...
In this paper, we investigate the energy-efficient power control for device-to-device (D2D) communications underlaying cellular networks with max-min fairness, where uplink resource blocks allocated to one cellular user equipment are reused by multiple D2D pairs to improve the frequency reuse factor, and the minimum individual energy efficiency (EE) is maximized. This is a generalized fractional programming...
Throughput, area and power optimized designs for the advanced encryption standard algorithm are proposed in this paper. The presented designs are suitable for the encrypt-only AES-128 algorithm. Both designs integrate pipelining and iterative architectures in one design. This is achieved through applying the concept of partial loop unrolling where iterations and multistage pipelining are used to optimize...
One of the most important topics of today is a packet processing in data centers with respect to the power consumption and efficient utilization of computational resources. The ARM architecture has proved to be an energy efficient computational system. Together with an integrated FPGA on a single die, it offers potentially a high performance with respect to the power consumption. DPDK - a set of libraries...
This paper proposes a capacity improving and energy saving scheduling scheme in push-based Converged Wireless Broadcasting and Cellular Network (CWBCN). We maximize the network capacity and alleviate request congestion through broadcasting/multi-casting the most popular services, and locally caching for further request on the user side. In the proposed scheme, we firstly introduce a UE (User Equipment)-based...
This study proposes a novel intelligent transmit power control and receive antenna selection (ITPCRAS) scheme to minimize the uplink power and co-channel interference in high-mobility communication environments with UL MIMO-SC-FDMA transceivers. In the proposed method, an ANFIS-based power controller (APC) is used to adjust the transmit power adaptively so as to minimize the user equipment (UE) transmit...
Ternary Content Addressable Memory (TCAM) provides superior table-lookup performance to the conventional search algorithms. However, as word length increases, large-sized TCAM suffers from high power consumption and throughput degradation. This paper presents filter-based dual voltage architecture for long-word TCAM. Without sacrificing throughput and noise immunity, the proposed filter-based dual...
WiFi activity is a major source of power consumption in today's smartphones. Consequently, accurately WiFi power consumption models are extremely useful for researchers and app developers. Among a large number of models proposed recently, a model introduced by Serrano et al. was the first to add a new component - a per-frame energy toll incurred as a frame traverses the protocol stack - to the power...
Spectrum scarcity together with high capacity demands make the use of millimeter wave (mmWave) frequencies an interesting alternative for next generation, i.e., fifth generation (5G), networks. Although mmWave is expected to play a key role for both access network and backhaul (BH), its initial use in the BH network seems more straight-forward. This stems from the fact that, in the BH case, its deployment...
Introduced by long-term evolution-advanced (LTE-A) cellular systems, coordinated multi-point (CoMP) transmission has shown remarkable aptitude for improving network performance. This paper proposes a novel CoMP technique for the downlink of two-tier heterogeneous LTE-A cellular networks. Thorough investigation is carried out to evaluate its performance in terms of total throughput, energy efficiency...
This work explores the benefits in terms of energy efficiency that can be provided by device-to- device (D2D) communications in cellular systems. Analyzing a large cellular network using stochastic geometry, considering Nakagami fading and realistic system parameters, we explore the reduction that can be achieved in network power consumption, and the impact this reduction has on the performance of...
Energy efficiency (EE) is an important issue at 60 GHz due to high power consumption of devices working at such high frequency. In this paper, we investigate EE optimization for full-duplex (FD) decode-of-forward (DF) relay-assisted 60 GHz multiuser indoor networks. In contrast to the existing spectral efficiency (SE) optimization, our scheme maximizes system EE for FD relaying system under cross-layer...
Dynamic spectrum access via active spectrum sharing has been considered as a promising approach to improve the spectrum utilization for future wireless systems. In this paper, based on our recent study on the optimal transmit-power allocation for an active spectrum sharing system comprised of single primary-user (PU) and multiple secondary-users (SUs) [7], we move a further step to investigate a more...
Since traffic diversity and volume increase with growing popularity of mobile applications, there is the strong need to manage the traffic carried by networks. Software defined networking can manage network while enabling new services by employing traffic management whose goal is to maximize the utility objective while satisfying given requirements. In this paper, we propose an efficient routing to...
A new-generation digital set-top-box (STB), as a core device of smart home, will provide mobile devices various multimedia services. In this study, we propose a more accurate power consumption model for mobile devices that are receiving video streaming services under the MPEG-DASH framework. The proposed model considers the influence of the encoding parameters specified by the encoder and the CPU...
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