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Failure in the network devices can be identified by detecting changes in the behaviour of the network. Such a network can be part of the communication infrastructure, which will play a significant role in the emergency managements. Network power consumption behaviour, namely its power profile, is a relatively robust profile such that from changes in that profile failure of the links or/and the nodes...
Demand side management (DSM) provisions have still large potentials in the residential sector. In the paper, a model of the residential customer's demand using a bottom-up approach, implemented in a load simulator, has been used in order to evaluate the impact of DSM actions on Italian average households' daily load shape. To this aim, some more diffuse demand management options have been simulated...
In Japan, it is expected to establish the smart grid as a power system into which a large amount of generation from renewable energy sources such as wind power generation and photovoltaic generation can be installed. A large penetration of these renewable energy sources causes some problems in power systems, e.g. distribution voltage rise and frequency fluctuation. Our research group has developed...
The last few years have seen a surge in the awareness of energy efficiency in many fields, including the networking community. As an answer towards such demands the IEEE has just released the 802.3az norm that provides a way for Ethernet physical interfaces to enter a low power mode when there is no traffic to send. At the same time there are starting to appear proposals for how to govern the physical...
We propose and investigate energy-saving algorithms for DOCSIS-3.0 networks. By proactively monitoring traffic load, the algorithms achieve network-wide energy saving by re-adjusting CM's bonding groups and shutting down under-utilized upstream/downstream ports on the CMTS. Numerical simulations indicate that by applying the CM side algorithm only, we can achieve a possible 17.6% energy saving for...
To enhance the energy efficiency of broadband wireless access devices based on battery power, a traffic-aware based adaptive sleep mode operation was proposed for IEEE 802.16e power saving mechanism. By analyzing the behaviors of a mobile station working in the sleep mode operation with a Markov chain model, we explore the relationship among traffic, energy consumption and delay. Based on the analytical...
To enhance power efficiency of battery powered wireless access devices, the behaviors of the mobile stations (MS) working in the sleep mode operation in IEEE 802.16e was researched with a method of the Markov chain model. By exploring the relationship among traffic load, power consumption and delay, we present a cross-layer design-based algorithm to tune the initial sleep window according to the randomization...
In this paper we present a distributed supervisory strategy for load/frequency control problems in networked multi-area power systems. Coordination between the control center and the areas is accomplished via data networks subject to communication latency which is modelled by time-varying time-delay. The aim here is at finding strategies able of reconfiguring, whenever necessary in response to unexpected...
In this paper, we propose a dynamic traffic load-aware sleep mode operation to improve the power efficiency of battery powered IEEE 802.16e devices. By analyzing the sleep mode operation with a Markov chain model, we explore the relationship among traffic load, power consumption and idle check time. Based on the analytical results, we propose a dynamic algorithm to tune the idle check time according...
Current mode (CM) scheme provides suitable alternative for the high speed on-chip interconnect signaling. This paper presents a energy-delay optimization methodology for the current-mode (CM) signaling scheme. Optimization for the CM circuits for on-chip interconnects requires a joint optimization of driver and receiver device sizes, as their parameters which affect the energy-delay performance depend...
This paper studies the impact of intra-die random variability on low-power digital circuit designs, specifically, circuit timing failures due to intra-die variability. We identify a new low-Vdd statistical failure mode that is strongly supply-voltage dependent and also introduce a simple yet novel method for quantifying the effects of process variability on digital timing - a delay overlapping stage...
This paper describes a design flow for the circuit-level optimization of a technology. The concurrent exploration of device characteristics and library design choices leads to a more application-optimal technology. We illustrate the design flow by: 1) analyzing the impact of buffer cell design, and 2) by optimizing a 130 nm technology for low operational power.
The design of a full integrated electronics readout for the next ILC ECAL presents many challenges. Low power dissipation is required, and it will be necessary to integrate together the very front-end stages with an analog to digital converter. We present here a 12 bit 30 MHz analog to digital converter using a pipelined architecture. It is composed by ten 1.5 bit sub-ADC with a final 2 bit flash...
The increasing ubiquity of mobile embedded systems has been matched by the evolution of a variety of wireless network standards and technologies. The major constraints of wireless embedded systems are limitations of communication bandwidth, processing capabilities, and battery power. Remote wireless embedded systems often act as sensors, which provide data to a certain community. The exchange of data...
In this paper, we address the issue of transmission power control (TPC) in wireless ad hoc networks. Power control plays an important role in energy saving and network performance enhancement. However, the existing TPC schemes either face the problem of hidden and exposed terminal or have additional hardware requirements. We propose a novel distributed power control protocol, called Receiver Initiated...
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