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Emerging multicore processors are increasingly power constrained and plagued by design uncertainty due to process variations. This paper proposes a novel framework that enables runtime core selection, thread-to-core mapping, and extended range dynamic voltage frequency scaling (DVFS) operating under near-threshold computing (NTC), nominal, and turbo-boost (TB) conditions. Our framework leverages the...
The emerging Dark Silicon limitation has led the application designers to carefully consider the available Thermal Design Power (TDP) budgets, hardware resources, and software characteristics. In this paper, we propose a hierarchical scheme for distributing the resources and TDP budget among concurrently executing applications with multi-threaded workloads under throughput constraints. Afterwards,...
Phase-change memory (PCM) has gained much attention recently since it offers several advantages over DRAM, such as high cell density and low leakage power. PCM has similar read power and latency as DRAM; however, its write power and latency are significantly higher than DRAM. Therefore, one challenge with PCM is how to increase write throughput under write power budget constraints. To increase write...
Reduction of energy consumption is becoming a crucial aspect of wireless communications, due to the need of lowering CO2 emissions and enhancing mobile network operators OPEX. In this work we consider a heterogeneous mobile network topology with coexisting macrocellular and microcellular Base Stations (BSs). By employing two energy optimization heuristics we determine operational profiles for the...
Wearable devices enable the unobtrusive sensing of a wide range of human activities and the development of innovative applications. Wireless communication capabilities are one of the crucial features of networked wearable devices, since they set data exchange specifications and heavily affect the power consumption of the devices. In this paper, we investigate the use of the Bluetooth Low Energy (BLE)...
In this paper, we study Two-Way Relaying (TWR) networks well-known for its throughput merits. In particular, we study the fundamental throughput delay trade-off in TWR networks using opportunistic network coding (ONC). We characterize the optimal ONC policy that maximizes the aggregate network throughput subject to an average packet delay constraint. Towards this objective, first, we consider a pair...
Long term evolution (LTE)-advanced aims the peak data rates in excess of 3 Gbps for the next generation wireless communication systems. Turbo codes, the specified channel coding scheme in LTE, suffers from a low-decoding throughput due to its iterative decoding algorithm. One efficient approach to achieve a promising throughput is to use multiple Maximum a Posteriori (MAP) cores in parallel, resulting...
Measuring multiple physical quantities are increasingly being demanded in commercial, biomedical and generally in ubiquitous applications. Although the recent emergence of passive sensor enabled RFID tags (sensor tags) provide new opportunities for these types of applications mainly due to the extended operational life and the small form factor, the energy harvesting nature of sensor tags hinders...
In this paper we discuss different methods to design digital filters with low power consumption. One efficient method is based on power supply voltage scaling where the excess speed that may be obtained using maximally fast recursive filter structures or non-recursive structures are exploited. We also discuss several techniques to increase and obtain the maximal sample rate for recursive structures...
Deep packet inspection or DPI is now a fast growing application technology in the field of network security, which requires the network security platform has a higher speed to handle a large number of session connections, and track the status of these connections quickly. This paper proposed the MP-DPI, a many-core based network processing platform, which uses the ATCA standard modular design, makes...
The 128-bit SM4[1] cipher is the first commercial cipher algorithm published by China in 2012, which is mainly used in WLAN. Comparing with conventional approaches, additive masking is adopted to resist the DPA (Differential Power Analysis) attack, and PPRM circuit structure is adopted to reduce the power consumption for SM4 S-box. Simulation results show that the design has a 50% reduction in power...
The amount of data moved over the Internet per year has already exceeded the Exabyte scale and soon will hit the Zettabyte range. To support this massive amount of data movement across the globe, the networking infrastructure as well as the source and destination nodes consume immense amount of electric power, with an estimated cost measured in billions of dollars. Although considerable amount of...
Due to the ever increased energy consumption, large research effort has devoted to the energy efficiency area. In this paper, a frequency scalable publish-subscribe filter forwarding node has been proposed and implemented for addressing this challenge. The frequency scaling filter can operate on three different frequencies, which adapts its capacity and power on different network throughput. Our work...
A green-energy-powered, self-sustainable cellular network is studied in this paper. To address the problem of the energy variability in the green sources, a joint energy-traffic management mechanism is proposed based on game theory. The interaction between the cellular network and a microgrid power controller is modeled as a two-level Stackelberg game. On the network level, an iterative combinatorial...
In the next few years, small cells (SCs) are expected to be densely deployed to achieve sustainable capacity enhancement. Due to the high SC density, some SCs will not have a direct connection to the core network, and thus will forward their traffic to their neighboring SCs through a multi-hop backhaul (BH). In such multi-hop architectures, the user association problem becomes challenging with BH...
In ultra-wideband (UWB) communications for power electronic systems, large power consumption and logic resource are occupied by multi-parallel sliding-block Viterbi decoders. A novel add-select-delay-compare architecture for Viterbi decoder is proposed to minimize these consumptions. In this architecture, a nested iteration of add-select and compare-select with balanced settling path is utilized to...
Multipliers are considered to be an important component in DSP applications like filters. Designing high-speed multipliers with low power have substantial research interest. Modified Booth Multiprecision Multiplier (MBMP) reduces the power consumption by selecting the small precision multipliers in accordance with the selection of input operands selector. The large area overhead can be reduced by...
Small cell enhancement is a key technology to meet future network capacity demands. Dual connectivity has been introduced in LTE Release 12 to enhance the LTE operation in heterogeneous deployments and improve the overall system performance. However, in the scenarios of dual connectivity, due to distributed scheduling in two eNodeBs (eNBs) connected with non-ideal backhaul, the total required transmit...
This paper proposes a redefined multiple access control (MAC) protocol of IEEE 802.15.4 standard, incorporating an adaptive synchronization algorithm with optimal sleep period. The modified standard, namely AS 802.15.4 provides better power consumption, reliability and synchronization among the sensors than the existing protocol. AS 802.15.4 MAC protocol is modelled using a four dimensional Markov...
With each nanometer technology, transistor size is shrinking and computation speed is increasing. Computation speed is bounded by the power consumption of cores and connecting network. So peak network power can not go beyond a certain limit since it starts aging due to thermal effect. Therefore, power optimization and fault handling become an important issue of on chip networks. In this paper we have...
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