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Wireless communications play a significant role in the spread of the Internet Of Things (loT). While all machines try to connect to the IoT and exchange data, wireless communications offer freedom of movement and demand of minimum infrastructure. The main obstacles that wireless communications face are the limited source of power and the short range of coverage. This paper highlights all the available...
In this paper, we have discussed the application of Zigbee technology. We have shown that a single remote controlled device can control different devices with different application. The experiment performed by us shows the simulation of zigbee within the range of upto 75 meters. The remote controller uses zigbee to control devices like air-conditioner, lights, automatic curtains, garage-shutters,...
Reliability optimization in Wireless Sensor Network (WSN) is obviously an important problem. The basic function of a WSN is to provide an adequate and quality data transmission as economically as possible with a reasonable level of reliability with minimum power consumption. To make the system more reliable, solar energy has been considered as energy harvesting strategy. In this paper, an algorithm...
This study presents the effect of residual energy of nodes in Wireless Sensor Networks (WSNs). There are many issues and challenges that still need to be solved in this area especially for energy contrain. This factor considered during clustering and routing approached to maximize network lifetime. To prolong network lifetime, there is a need for efficient power control mechanisms to reduce power...
Opportunistic spectrum access is a key technology for the development of novel applications with stringent QoS requirements on top of wireless sensor networks. However, the many challenges posed by opportunistic spectrum access itself are further exacerbated by the power constrained nature of wireless sensors and the QoS requirements of the applications to be supported. In this work we consider the...
This paper presents a power-efficient modular wireless platform which has been designed for prototyping and pre-clinical evaluations of neural recording implants. This Kit for Designing Implants (KDI) is separated in function specific modules of 34×34mm which can be assembled as needed. Five modules have been designed and optimized for ultra-low power consumption and a protective casing has been designed...
In this paper, we aim at the optimal use of the scarce energy collected by a node powered by human energy harvesting in order to improve the provided Quality of Service (QoS). To achieve this goal, we have developed a Power-QoS control scheme, called PEH-QoS. PEH-QoS is composed of three sub-modules that interact with each other in order to make optimal use of energy and get the best possible QoS...
With the wide use of smart phones, the performance and power-saving issue is also increasing. Since the battery capacity is limited, the energy-saving technology is very important to mobile devices. In this study, we proposed an approach to observe energy consumption of smart devices, especially while smart devices are connect to a wireless hotspot with UDP protocol.
An ever increasing variety of applications are being addressed by wireless sensor networks, resulting in a continuous proliferation of their deployments, which are in many cases co-located. This development is mostly hindered by the operational complexity involved with management and maintenance of large numbers of small, battery powered wireless sensor devices. The paradigm of energy aware self-growing...
Given the growing concern over energy consumption and associated global warming, green communication is becoming more and more important. Lots of efforts have been put into investigating energy efficiency based design in wireless systems. Unfortunately, the maximum energy efficiency of a point-to-point link is normally achieved when the transmit power approaches zero, which, however, is not desirable...
For energy constrained wireless sensor networks, lifetime is a critical issue. Several medium access control protocols have been proposed to address this issue, often at the cost of poor network capacity. To address both capacity and energy issues, we propose a novel medium sharing protocol for Wireless Sensor Networks named Cascading Tournament (CT-MAC). CT-MAC is a synchronous, localized, dynamic,...
Rapid advances in wireless communication technology recently have led to the development of sensor nodes to form wireless sensor network (WSN). However, these nodes have limited battery power and due to the nature of this technology which enables communication between nodes which can be deployed anywhere including hard-accessed area, thus it is not feasible to recharge or replace the batteries. Therefore...
A three-dimensional discrete-time Markov Chain model is applied to analyse the performance of the IEEE 802.15.4 MAC protocol under burst channel errors. Real world wireless sensor network conditions including unsaturated traffic, frame retransmission and acknowledgement (ACK) frame transmission are considered for the analysis. The system performance is evaluated in terms of aggregate network throughput,...
In this paper, we apply a discrete-time Markov Chain model to analyse the performance of IEEE 802.15.4 MAC Protocol with acknowledgement (ACK) frame transmission under unsaturated traffic conditions. We evaluate the system performance in terms of aggregate throughput and average power consumption of a node. Analytical results are substantiated through ns2 simulations. The effects of frame arriving...
In order to sustain a longer lifetime, an important research in the Wireless Sensor Network (WSN) is to improve power efficiency. Review of many technologies in the involvement, the essential idea is to remove power redundancy. The GAF algorithm is able to get a WSN with longer lifetime by reducing the node redundancy in transmitting data, On the other hand, the CODE, based on the GAF algorithm, is...
Reduction of power consumption and network's autonomy prolongation are crucial for a WSN. This is typically performed with low duty cycle of sensor nodes. A special challenge in WSNs is transmission of a large amount of data, like images and video, that is becoming more and more required in various applications. This paper presents a study of fragmented image transmission with IEEE 802.15.4/ZigBee...
Achieving Quality of Service (QoS) objective in Wireless Sensor Network (WSN) handling the multimedia information has significantly gained the importance lately besides energy efficient hardware designing. Transport layer of the WSN communication protocol stack plays a significant role in meeting the QoS objective of WSN. This paper presents a light weight transport protocol for WSN that can handle...
In this paper we study the effectiveness of two power gating methods - transistor switches and MEMS switches - in reducing the power consumption of a design with a certain target throughput. Transistor switches are simple, but have fundamental limitations in their effectiveness. MEMS switches, with zero leakage in the off state, have achieved much focus over the past decade in the RF field, but have...
Wireless body-area sensor networks (WBSN) are a key component of e-Health solutions. Many different physiological parameters can be monitored and collected continuously by wearable wireless sensors with high accuracy, low power consumption and limited cost. In this work we focus on WBSN for real-time biofeedback applications. In this domain the real-time nature of I/O data streams is of critical importance...
IEEE 802.15.4 is a current major technology for low-rate low-power wireless networks. To study the applicability of IEEE 802.15.4 over a wireless body area network (WBAN), in this paper we evaluate its three different access schemes' performance through several metrics. Considering the coexistence of contention access period (CAP) and contention-free period (CFP), we also study the mutual influences...
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