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One of key attributes of WBAN is to extend the network lifetime, which can be achieved by adjusting the wakeup and sleep modes of the sensor nodes. Traditional low-power methods such as channel polling and periodic duty cycling are unable to satisfy WBANs requirements due to idle listening, collision, and control packet overhead problems. In this paper, we propose an RFID-enabled MAC protocol (RMAC)...
Certain Wireless Sensor Network (WSN) applications such as patient monitoring, smart grid, and equipment condition monitoring require accurate estimation of specific WSN parameters such as end-to-end delay, reliability and power consumption. The estimation of these parameters calls for an accurate and lightweight WSN model that is suitable for the low processing capabilities of sensor nodes. In this...
Homomorphic encryption allows arithmetic operations to be performed on ciphertext and gives the same result as if the same arithmetic operation is done on the plaintext. Homomorphic encryption has been touted as one of the promising methods to be employed in Smart Grid (SG) to provide data privacy which is one of the main security concerns in SG. In addition to data privacy, real-time data flow is...
In this paper, PAFusion, a power-aware framework for distributed data fusion applications in wireless sensor networks is proposed. It is designed for mapping distributed data fusion application into networks. We have evaluated the performances of PAFusion compared to DFuse and optimal solution through simulation. The simulation results show PAFusion has better performances than DFuse and PAFusion...
Coexistence of multiple wireless body area networks (WBAN) is a very challenging problem because piconets move frequently and each piconet can have hundreds of sensors. The IEEE 802.15.6 task group is developing a standard based on superframe-level frequency-hopping scheme, which is a good solution to the piconet coexistence problem without requiring coordination between piconets. However, its spectrum...
Over the last decade, significant progress has been made in the development of wearable sensor systems for continuous health monitoring in the home and community settings. One of the main areas of application for these wearable sensor systems is in detecting emergency events such as falls. Wearable sensors like accelerometers are increasingly being used to monitor daily activities of individuals at...
Medium access control (MAC) protocol plays a crucial role in energy-efficiency, latency reduction and throughput for sensor networks. However, it is nontrivial to achieve good performance in different facets of metrics at the same time. In this paper, we present the performance of an Adaptive Scheduling MAC (AS-MAC) protocol with different Adaptive Scheduling period (AS-period) in multi-hop networks...
Distributed data fusion application in Wireless Sensor Networks is very promising, because the change from centralized model to distributed model will average the computation of data fusion algorithm consequently average power consumption in sink node and more importantly placement data fusion functions in networks will decrease data transmission cost and sink node can easily and efficiently re-task...
Recently, wireless sensor network is widely used. The deployment of WSN in the field, however, is still restricted due to limited energy supply, limited computing power, limited buffer size, and packet delay. In this paper we present a new cluster model and polling protocol integrating the schedule polling and low power listening scheme. The new clustering approach allows short routing between the...
In recent years various types of implantable medical devices have been proposed for monitoring various physiological parameters of human body. Long term maintenance-free operation of these devices requires extreme low-power operation to avoid periodic replacement of batteries. For real-time monitoring of health condition, the implantable medical devices also need to transmit the vital information...
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...
Advances in sensor technology, wireless mesh networking and embedded processors are pushing development of new technologies in Wireless Sensor Networks (WSN). The wide variety of potential applications and platforms makes hard to port and develop new applications to different platforms keeping smart and efficient behavior of the nodes of WSN. For this reason nowadays middlewares are emerging as a...
IEEE 802.15.4 can optionally use the superframe structure for data transmission. However, the duty cycle of the superframe structure cannot be dynamically adjusted according to the situation of the entire network. Thus, when the traffic load of the network is high, the insufficient active periods will decrease the transmission opportunities of devices and increase the collision probability. In order...
We propose a new MAC which promises deterministic packet transmission delay and highly reliable communication in a convergecast network. Our MAC provides a higher communication success ratio in both line of sight and non line of sight environment. We compared the performance of our MAC to contention based MAC using CSMA/CA.
Wireless sensor networks may support heterogeneous applications ranging from classical environmental monitoring, to more demanding integrated surveillance systems based on multimedia traffic. To this extent, we argue that the specific MAC layer solutions must be flexible enough to provide differentiated services based on the context of the specific WSN. In this work, we leverage the SPARE MAC protocol...
Wireless distributed computing has several unique problems compared with currently well investigated wireless sensor networks. These problems include the impact of channel variation on power allocation, different traffic pattern with higher utilization, and more restricted delay constraints. This paper investigates the impact of communication channel condition on the average execution time of the...
Due to the limited battery in wireless sensor networks (WSNs), energy efficiency is an important factor when designing a MAC protocol. To minimize energy consumption, most of MAC protocols in WSNs exploit low duty cycling. Among those, RMAC allows a node to transmit a data packet for multiple hops in a single duty cycle, which is made possible by exploiting a control frame named Pioneer (PION) for...
In wireless sensor networks (WSN), energy efficiency is crucial to achieving satisfactory network lifetime. The most commonly used and may be the only efficient method to reduce the energy consumption significantly is to turn off the radios most of the time, except when it has to participate in data communication. The key challenge is to operate the radio at a low duty cycle but still ensure the delay...
When wireless sensor network (WSN) based on ad hoc network is deployed to car parking guide system without parking helper at area or building with large scale of parking lots, the optimum number of cluster heads was derived for getting the minimum power consumption as well as time delay. Through the theoretical analysis of power consumption and time delay with the number of cluster heads in wireless...
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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