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This study deals with a strategy to save energy in an Internet protocol (IP) network allowing different subsets of IP links to be put in the sleep mode during different traffic periods. The proposed solution involves a three-phase algorithm. In the first phase, time-varying critical traffic matrices from a large collection of real traffic matrices are obtained. In the second phase, a local search...
Reducing energy consumption in the Internet has become an increasingly important goal recently. Previous work on reducing energy consumption has primarily looked at either changing link rates or putting interfaces to sleep. Due to the unpredictable nature of traffic, the energy savings achieved have been modest, do not scale, and incur losses and delay. This article proposes a different approach to...
Energy consumption is not well balanced for all sensor nodes in most of the energy efficient routing protocols for wireless sensor networks (WSNs). In this paper, we optimize each individual distance so that all sensor nodes consume their energy at similar rate. After the theoretically analysis of hotspot based on certain energy and traffic models, we propose our Distance-based Energy Aware Routing...
Clustering is an effective approach to hierarchically organizing network topology and to prolong the lifetime of a wireless sensor network. Current clustering protocols usually utilize two techniques: selecting cluster heads with more residual energy and rotating cluster heads periodically to distribute the energy consumption among nodes in each cluster. Most of the researches in this field has focused...
It has been proved radio sleep can significantly prolong the lifetime of wireless sensor networks; however, sleep causes more multi-hop latency and fewer throughputs under heavy load. This paper proposes a dynamic sleep MAC protocol LD3-MAC for wireless sensor networks, which uses global schedule, stagger sleep and periodic synchronization to achieve sleep coordination. The dynamic listening scheme...
In this paper, we present a new MAC protocol satisfying with both high energy efficiency and low transmission latency at the same time over wireless sensor network, named as medium reservation preamble based MAC (MRPM). The proposed MRPM is a synchronized duty cycle MAC protocol. MRPM has three main features. The first feature is that MRPM does not have separate time frames for Sync and data traffics...
Current wireless sensor network applications face challenging power constraints that demand low duty cycles. In this paper, we propose an energy-efficient, flow-specific medium access scheme that is capable of achieving low duty cycles while taking advantage of the performance improvements available through a flow-specific medium access approach. The scheme is based on an adaptive sleep and wake cycle...
Multipath routing can reduce the need for route updates, balance the traffic load and increase the data transfer rate in a wireless sensor network, improving the utilization of the limited energy of sensor nodes. However, previous multiple path routing methods use flooding for route discovery and transmit data with maximum power regardless of need, which results in waste of energy. Moreover, often...
Home gateway (HG) is a device that connects multiple home network devices to an access network. The HG is to be always in operating state for providing any requested digital home services without suspension and user's waiting because these services can be started at any time, by any device and from any network. Furthermore, most home network devices are also required to be ready to operate at any...
This paper explores the power saving technique for multi-hop ad-hoc wireless networks that reduces energy consumption without significantly diminishing the capacity or connectivity of the network. EEN (Energy Efficient Network) builds on the corrective observation of Power saving network when a region of multi shared-channel wireless network has a sufficient density of nodes, only a small number of...
The adaptive modulation and coding (AMC) schemes has long been adopted at physical layer to combat time-varying properties of the wireless channel. However, transmitting packet over deep fading channel can render extra energy expenditure, due to the incorporation of more error protection or usage of lower modulation mode, which is unaffordable for energy-limited wireless sensor device. To avoid such...
In this paper, we present a new contention access method for scalable wireless sensor networks. In these networks, the traffic levels are often variants, particularly in monitoring applications. Sensors do not regularly have much data to send. However, when an event occurs, every sensor in a given area will send its alert to the access point simultaneously. Hence, this network suffers a huge number...
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