The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
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,...
Recently, bulk-data or burst transmission has been the focus of research in wireless sensor networks. The aim is to benefit applications which require high throughput but small scale deployment. Healthcare applications and applications which are intended to support independent living for the elderly are typical examples. The main idea is to exclusively provide the channel for one transmitter only...
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...
A WSN consists of large number of small power units called nodes that perform the operation of sensing, data collection, computation, compression, transmission. Recently there has been much stress on improvements in WSNs by designing new techniques and approaches for achieving energy efficiency and improved lifetime. Since the network is constrained in terms of capabilities of power, energy, computation...
In this work, we mainly consider the synchronization problem of hybrid transmit-only nodes for slight modified IEEE 802.15.4 wireless sensor networks, which is called TRO 802.15.4. However, we should let the IEEE 802.15.4 networks to fit transmission cycle of transmit-only nodes in order to achieve the synchronization. The adaptive beacon interval shifting and resizing (ABISR) algorithm is then proposed...
Interference between concurrent transmissions causes severe performance degradation in a wireless network. This paper addresses interference cancellation to enable simultaneous packet receptions at a node with a single radio in Wireless Sensor Networks (WSN). Interference cancellation is particularly important for WSN as most of its applications rely on convergecast where all the traffic in the network...
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...
In the non-time-slotted cognitive radio networks (CRNs), the synchronization between PUs and secondary users (SUs) cannot be guaranteed, resulting in two challenging problems: the reactivation-failure of PUs and the frequently unexpected hand-offs among SUs. The reactivation-failure of PUs is the incident that the SUs cannot detect the PUs' reactivation when the SUs are occupying the channels to transmit...
The proliferation of loT applications drives the need of ubiquitous connections among heterogeneous wireless devices. Cross-Technology Communication (CTC) is a significant technique to directly exchange information among heterogeneous devices that follow different standards. By exploiting a side-channel like frequency, amplitude or temporal modulation, the existing works enable CTC but have limited...
When different technologies use the same frequency bands in close proximity, the resulting interference typically results in performance degradation. Coexistence methods exist, but these are often technology specific and require technology specific interference detection methods. To remove the root cause of the performance degradation, devices should be able to negotiate medium access even when using...
Energy harvesting is a promising approach to enable autonomous long-life wireless sensor networks. As typical energy sources present time-varying behavior, each node embeds an energy manager, which dynamically adapts the power consumption of the node to maximize the quality of service, while preventing power failure. In this work, RLMan, a novel energy management scheme based on reinforcement learning...
In this paper, we investigate the delay and delay-constrained throughput performance of a point-to-point wireless-powered communication system, where one node, e.g. a user equipment (UE), is powered by the wireless energy transferred from the other node, e.g. an access point (AP), and uses the harvested wireless energy to send data to the other node. Our focus is on the delay performance of sending...
Intravehicular wireless systems are attracting a lot of research interest during the last years. A future scenario where intravehicular wired systems will be replaced by wireless systems will allow to reduce cabling weight and increase the flexibility. But one of the main requirements of wireless systems is to maintain the same reliability level as the wired ones. A system based on LDM (Layered Division...
The underwater wireless remote sensors convey messages in a range, where there is no possible human intervention. It is difficult to replace the battery in order to sustain energy in an acoustic environment. Moreover, considering the environment, solar energy cannot be used to recharge for batteries. These sensors are required to be awake for an extended period, taking in consideration that they have...
Lately Video Sensor Networks (VSN) are increasingly being used in the context of smart cities, smart homes, for environment monitoring, surveillance, etc. In such systems, due to limitations in the video sensor node resources, the most important factor is energy efficiency. Sensing, processing and transmitting are the main contributors to energy consumption in a video sensor node. Among these, wireless...
With an advancement towards the paradigm of Internet of Things (IoT), in which every device will be interconnected and communicating with each other, the field of wireless sensor networks has helped to resolve an ever-growing demand in meeting deadlines and reducing power consumption. Among several standards that provide support for IoT, the recently published IEEE 802.15.4e protocol is specifically...
Wireless sensor network is an application tools which play a important role in monitoring remote environment and tracking of target. It consisting Sensor node which are smallers cheaper and intelligent, which consume small amounts of battery or power. By using this data is transferred. There is lots of routing technique that provides significant benefits to wireless sensor networks concerning both...
The performance of existing coded caching schemes is sensitive to the worst channel quality, when applied to wireless channels. In this paper, we address this limitation in the following manner: in short-term, we allow transmissions to subsets of users with good channel quality, avoiding users with fades, while in long-term we ensure fairness across the different users. Our online delivery scheme...
The Raspberry Pi has become one of the most popular devices used in the internet of things studies because of its flexibility and affordability for prototyping purposes. It has found its niche in wireless sensor networks as it can function both as sensor node and router node just by adding wireless adapter. Studies have employed the Raspberry Pi as WSN mesh node and sensor node. These studies looked...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.