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Data center energy consumption has become one of the top concerns in designing and operating large-scale data centers as cloud service providers such as Amazon, Google, IBM and Microsoft have begun to establish more data centers in response to growing requests in clouds. In recent years, extensive efforts have been put into the research of reducing the energy consumption of servers. With the improvement...
A Mobile Adhoc Network (MANET) is featured by multi hop wireless connectivity with topology change due to highly mobile stations with autonomous configuration ability. Therefore, it is very challenging to develop vibrant and resourceful routing Protocol for MANET which also performs excellent routig with security feasibility. This paper presents a detailed study and analysis of various routing issues...
Future applications running on many-core processors with tens to hundreds of cores on a chip will require an efficient inter-core communication strategy to achieve high performance. Photonic Networks-on-Chip (PNoCs) have emerged as a promising alternative to the conventional metal based networks-on-chip due to their advantages in bandwidth density, power efficiency and propagation speed. However,...
Exascale networks are expected to comprise a significant part of the total monetary cost and 10-20% of the power budget allocated to exascale systems. Yet, our understanding of current and emerging workloads on these networks is limited. Left ignored, this knowledge gap likely will translate into missed opportunities for (1) improved application performance and (2) decreased power and monetary costs...
Power will be a first-class operating constraint for Exascale computing. In order to manage power consumption of systems, measurement and control methods need to be developed. While several approaches have been developed by hardware manufacturers, they are vendor-specific and in some cases implementation-specific interfaces. Integrating all of the individual device level measurement and control functionality...
Mobile ad hoc network is wireless network that employ multi-hop radio relayed and are capable of achieving without the support of any fixed infrastructure. The cut of any central coordinator makes the routing more complex. All nodes of these networks behave as routers and take part in discovery and maintenance of routes to other nodes in the network. This characterstic presents a big challenge to...
Today's generation has perceived wireless networking prospective applications in tremendously erratic and vibrant surroundings. Businesses as well as individuals pick wireless medium as their choice as it facilitates flexibility of location. It's obvious due to its convenience in terms of mobility, portability or even ease of installation at any preferred location. Mobile network has an intrinsic...
in this paper, we have urbanized a fresh sink placement policy in Wireless Sensor Networks (WSNs). We studied the problems in previous sink placement strategies such as RSP, CNP, GOSP, SOSP, CLHM, ISP, and GSP. These previous sink placement strategies are not concerned about dynamicity of the network under consideration. The information about sensor nodes positions is not known beforehand in concerned...
CMOS scaling so far enabled simultaneous system throughput scaling by concurrent improvements in delay, power, and area with thanks to Moore's law. CMOS scaling becomes more difficult with the limits of interconnect and increasing wafer cost. It is empirical to consider the system-on-chip (SoC) context to choose the most critical process knobs since most of processing budget to scale a technology...
Ad-hoc networks allow nodes communication without an infrastructure, so they can be used in many environments. This lack of infrastructure introduces many security threats to the nodes in the network. Communication between nodes must be reliable, and protocols for MANETs need to make it possible. Due to the wireless channel and to the possible malicious behavior of nodes, it is necessary to introduce...
The energy in FPGA computations can be dominated by data communication energy, either in the form of memory references or data movement on interconnect (e.g., over 75% of energy for single processor Gaussian Mixture Modeling, Window Filtering, and FFT). In this paper, we explore how to use data placement and parallelism to reduce communication energy. We further introduce a new architecture for embedded...
Various constraints such as limited Residual Power, Bandwidth and Transmission Range of nodes are the factors that affect the performance of routing protocols in mobile ad hoc networks. This paper is dedicated to the study and simulation of effect of these constraints on the performance of MANET Routing Protocol in idealistic environment. For this purpose a simulator is designed using MATLAB-10, that...
Remaining energy is the energy of the nodes after transreceiving data in network. This energy of nodes is the main parameter to control the energy consumption of wireless mobile ad-hoc networks. An optimum remaining energy is required to maintain life of network. In this paper, transmission energy management is proposed to optimize energy consumption of nodes in network. Transmission energy consumption...
In wireless network, nodes are not connected by physical links. Routing is an important factor in wireless network. Ad-hoc On-demand Distance Vector (AODV) is one of the most widely used routing protocol in wireless sensor networks. AODV is a stateless protocol that establishes and maintains a single route between source and destination. If the path is disrupted, then another alternate path is determined...
In recent years, multiple Voltage Frequency Island (VFI)-based designs have increasingly made their way into both commercial and research multicore platforms. On the other hand, the wireless Network-on-Chip (WiNoC) architecture has emerged as an energy-efficient and high bandwidth communication backbone for massively integrated multicore platforms. It becomes therefore possible to exploit the small-world...
To solve the congestion of NoC caused by overload such as injection rate increase, this paper proposes a novel routing algorithm, that is Dynamic and Mixed Routing(MIXROUT) which is based on XY Routing(XY) and Multiple and Load-Balance Path Routing(MULTI). Although MULTI is an adaptive routing that can relieve traffic congestion state, it has a higher operating power and temperature than other routing...
Energy conservation is drawing increasing attention in data networking. As networks are designed for peak traffic, network elements typically operate at full speed and consume maximum power even when carrying low traffic. One school of thought believes that a dominant amount of power saving comes from turning off network elements. The difficulty is that transitioning between the active and sleeping...
In DTN, a small amount of selfish nodes occupy the storage of specific key nodes with stronger transfer capacity in hot spot region which greatly consumes the limited network storage resource. This causes congestion and reduces the successful delivery ratio of messages from other nodes. This paper adopts pigeonhole principle and power in combinatorics to define node's responsibility range of message...
This paper explores a variation of the Han-Carlson adder for large word sizes and compares the performance of the new design with the traditional design. This work introduces a second type of design with two Brent-Kung stages each at the beginning and at the end and with Kogge-Stone stages in the middle, henceforth referred to as the “Hybrid Han-Carlson design.” With the new design, the Hybrid Han-Carlson...
We investigate the routing of communications in chip multiprocessors (CMPs). The goal is to find a valid routing in the sense that the amount of data routed between two neighboring cores does not exceed the maximum link bandwidth while the power dissipated by communications is minimized. Our position is at the system level: we assume that several applications, described as task graphs, are executed...
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