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Low-Rate Wireless Sensor Networks (LR-WSNs) has become an active area of research in recent decades. ZigBee is a wireless standard based on IEEE 802.15.4 for LR-WSNs. Since in Zigbee networks energy is one of the most vital issues, the routing protocols must be energy efficient. By default, ZigBee uses an Ad hoc On-Demand Distance Vector (AODV) routing protocol. In AODV, broadcasting is the backbone...
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,...
To achieve a reliable and robust system for environmental monitoring, there is an available technology that can be used to resolve this problem and moreover provide for better living. Wireless sensor networks (WSN) have been successfully applied in many environmental monitoring. An ad-hoc wireless sensor network consists of a number of small and self-power sensing devices (nodes) connected using effective...
Cross-technology communication (CTC) techniques are introduced in recent literatures to explore the opportunities of collaboration between heterogeneous wireless technologies, such as WiFi and ZigBee. Their applications include context-aware services and global channel coordination. However, state-of-the-art CTC schemes either suffer from channel inefficiency, low throughput, or disruption to existing...
Recent research on CTC (cross-technology communication) demonstrates the viability of direct coordination among heterogeneous devices (e.g., WiFi and ZigBee) with incompatible physical layers. Although encouraging, current solutions suffer from either severe inefficiency in channel utilization or low throughput using limited beacons. To address these limitations, this paper presents C-Morse, which...
Railway signaling systems are used to efficiently control railway traffic to maximize the throughput of rolling stock on the railway network without compromising security and safety, allowing railway transportation operators to allocate a greater number of trains on the same track. Current U.K. signaling systems rely on a physical interconnection grid for power supplying and data transferring. Hence,...
The paper presents cooperative communication based wireless sensor network for monitoring Green house related parameters such as Temperature, humidity and Carbon-di-oxide. The system is demonstrated by using network simulator NS2 with increased network capacity to suit large geo graphical areas. The comparison results show that cooperative transmission provides better performance than non-cooperative...
The interconnection of distributed sensor nodes that is used to measure the sensor data in remote locations is called as Wireless Sensor Network (WSN). Each of the sensors is interfaced with a microcontroller to form wireless sensor node. Different types of devices like PDA'S, laptops, television etc., are used in consumer electronics that use different software and protocols. There is no common communication...
Indoor Air Quality (IAQ) is an urgent topic nowadays. It is concluded that 90% of human's life is spent indoor. However, it is commonly known that materials used in construction or furniture is often detected to release Volatile organic compounds (VOC) which affect IAQ significantly and lead to dizziness, respiratory irritation, fatigue, asthma and allergic airway disease and even cancer. As a result,...
Frame fragmentation into small blocks with dedicated error detection codes per block can reduce the unnecessary retransmission of the correctly received blocks. However, the optimal block size varies based on the wireless channel conditions. Further, blocks within a single frame may have different optimal sizes based on variations in interference patterns. This paper proposes a hybrid interference-resilient...
Wireless Sensor Network (WSN) is an emerging field in the broader area of wireless networking; with application ranges from surveillance to health care. One of the major quality of service (QoS) degradation factor is last hop bottle neck in WSN, which results in low throughput and valuable energy depletion of the nodes; resulting in degradation of overall network lifetime and latency. This paper provides...
With the popularity of winter tourism, the winter recreation activities have been increased day by day in alpine environments. However, large numbers of people and rescuers are injured and lost in this environment due to the avalanche accidents every year. Drone-based rescue systems are envisioned as a viable solution for saving lives in this hostile environment. To this aim, a European project named...
Constant monitoring of patient's health is essential to provide appropriate healthcare. With advances in electronic circuit miniaturization and micro-electromechanical systems (MEMS), wearable sensor nodes can be used to acquire physiological signals from patient's body and transmit them to a remote location which can be accessed by the doctors. Wireless Sensor Networks (WSNs) are becoming an integral...
Wireless Sensor Networks (WSNs) are used to monitor different ambient conditions. These networks can be used for constant environment and habitat monitoring applications such as sensing of humidity, temperature, soil moisture and fire. All these applications have certain desired network performance and lifetime requirements. In this paper, we present our findings about variation in network performance...
Wireless Sensor Networks (WSNs) have emerged as a new class of large scale networks of embedded systems with limited communication, computation and energy resources. Recently IEEE 802.15.4 standards are accepted as Low-Rate Wireless Personal Area Network (LR-WPAN) which are most extensively used communication platform for WSNs. Traditional routing in IEEE 802.15.4 networks is based on Ad hoc On-demand...
Although the proliferation of wireless medical devices is mounting??partially due to benefits of wireless technology??associated risks must be evaluated. The Food and Drug Administration (FDA) is asking medical device manufacturers to quantify these by testing their wireless medical devices for coexistence. This can be a tedious and complicated chore. To streamline the process and to disseminate information...
ZigBee, a unique communication standard designed for low-rate wireless personal area networks, has extremely low complexity, cost, and power consumption for wireless connectivity in inexpensive, portable, and mobile devices. Among the well-known ZigBee topologies, ZigBee cluster-tree is especially suitable for low-power and low-cost wireless sensor networks because it supports power saving operations...
In this paper, we propose a new multichannel allocation protocol for ZigBee/IEEE 802.15.4 networks. The main goal is to improve the global throughput which is basically insufficient to satisfy high bandwidth requirements for applications like monitoring or traffic control. The solution is based on the availability of multiple channels on current low-cost, low-energy radio transceivers, such as TI/Chipcon...
The recent emergence of the sensor networks technology is significantly impacting the capabilities for automated distributed monitoring of environments. The low manufacturing cost of sensors, increased coverage and accuracy in distributed sensing due to their large deployments and their ability to operate in inhospitable terrains has made them an amenable technology for various surveillance and monitoring...
A framework for the joint design of wireless network and controllers is proposed. Multiple control systems are considered where the sensor measurements are transmitted to the controller over the IEEE 802.15.4 protocol. The essential issues of wireless networked control systems (NCSs) are investigated to provide an abstraction of the wireless network for a co-design approach. We first present an analytical...
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