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Wireless sensor network consists of spatially distributed autonomous devices using sensors to monitor various conditions. There are many issues concerned with wireless sensor networks, namely routing to save energy, fault tolerance, production cost, scalability, data aggregation, security and quality of service. Since the network life time depends on power consumption, energy is considered as an important...
Wireless Sensor Network(WSN) consists of tiny sensor nodes that are capable of sensing the environment and transmit the gathered information to the monitoring site. Conventional WSN architecture has limitations in bandwidth, power and storage. In case of multimedia applications data to be handled by the network is too large, which can be reduced with help of a technique known as Compressed Sensing(CS)...
Controlling the surrounding world by just the power of our thoughts has always seemed to be just a fictional dream. With recent advancements in technology and research, this dream has become a reality for some through the use of a Brain Computer/Machine Interface (BCI/BMI). One of the most important goals of BCI is to enable handicap people to control artificial limbs. Some research proposed wireless...
Heterogeneous networks allow mobile nodes to take advantage of best radio facilities for their coexisting connections. Vertical handover (VHO) between them is required to perform Always Best Connected (ABC). VHO is one of the most challenging research issues for wireless networks. The traditional decision making schemes cannot meet the VHO requirements of mobile networks, and the performance may degrade...
Heterogeneous networks allow mobile nodes to take advantage of best radio facilities for their coexisting connections. Vertical handover (VHO) between them is required to perform Always Best Connected (ABC). VHO is one of the most challenging research issues for wireless networks. The traditional decision making schemes cannot meet the VHO requirements of mobile networks, and the performance may degrade...
In this paper a summary is given of the ongoing research work at Vikram Sarabhai Space Centre, Trivandrum on Wireless Instrumentation System (WIS) for Satellite Launch Vehicle applications. WIS is based on the physical layer (PHY) of IEEE802.15.4, Low Rate Wireless Personal Area Networks Standard (WPAN). However the researchers have pointed out the unsuitability of available 802.15.4 standard in terms...
Underwater Acoustic Sensor Network (UASN) has become increasingly important, with numerous applications emerging from various areas such as commercial, environmental-research and defense. This paper provides a comprehensive view of current state-of-the-art in UASN by analyzing the research done by various communities. It briefly states the basics of underwater acoustic communication and cites advances...
In this paper, we propose a time division method to solve the congestion control problem for an event-driven sensor network. In this method, a node adjusts time (therefore bandwidth) assigned to each upstream node by a dynamic TDMA approach to efficiently use resources available to the system and avoid the situation in which a node cannot send event information to the BS on time through the insufficiently...
Wireless standardization activities such as the Bluetooth V4.x (Bluetooth smart) have led to an explosive growth in innovative short-range wireless devices capable of providing various services to assist everyday life. Allowing Machine-to-Machine (M2M) communication between these M2M devices also enable new commercial service opportunities. The M2M service providers including telecom carriers may...
A WSN enabled Home Energy Management System (HEMS) can achieve user behaviour change by providing real-time feedback of domestic energy consumption. However, features in collecting nodes within HEMS Systems need to change to allow new working patterns to be established which adapt to ad-hoc demands for energy data retrieval, e.g. different acquisition frequencies, and light-weight quality control...
The recent advancements in wireless sensor hardware ensures sensing multiple sensor data such as temperature, pressure, humidity, etc. using a single hardware unit, thus defining it as multi-sensor data communication in wireless sensor networks (WSNs). The in-processing technique of data aggregation is crucial in energy-efficient WSNs; however, with the requirement of end-to-end data confidentiality...
Big data are found in numerous underwater applications, such as Seismic Monitoring, Detection and tracking of marine objects applications, underwater multimedia systems, 3D maps of underwater sites, and many other applications. Such information is large in size and often generated continuously at fast rate. Current techniques used to collect data from underwater nodes relay on different approaches...
Mobile Ad hoc Networks (MANETs) are the networks of mobile nodes which do not require any access points to communicate with each other within the radio range. Due to their applications in situations such as emergencies, crisis management, military and healthcare, message security is of paramount importance in mobile ad-hoc networks. The paper proceeds with a brief introduction of MANETs followed by...
Wireless sensor networks possess significant limitations in storage, bandwidth, and power. This has led to the development of several compression algorithms designed for sensor networks. Many of these methods exploit the correlation often present between the data on different sensors in the network. Most of these algorithms require collecting a great deal of data before compressing which introduces...
Recently, there is a massive growth in the amount of wireless video traffics. To increase the network efficiency and cater to the needs of Quality of Experience (QoE), researchers propose hybrid MAC schemes, with multiple MAC protocols anchored in a single MAC layer. Different MAC protocols are selected for diverse users' requirements. However, the existing hybrid MAC mainly combines various MAC protocols...
Wireless sensor network is a deployment of sensors and the Base station. If base station is not reachable directly for the sensors, an intermediate sink node also deployed as relay node. A sensor senses the environment and forwards the sensed raw data in digital format to the sink hop by hop. Bandwidth allocation is a phenomenon to equally distribute the probability of transmission from sensors to...
Machine-to-machine (M2M) communications in cellular networks enables Internet of Things in the macro geographical regions and is a promising technique in next-generation wireless networks. In this paper, we study energy-efficient clustering design in cellular networks to maximize the overall network battery life time. We propose a new clustering design which finds the optimal number of clusters in...
The Underwater Acoustic Sensor Networks (UWASN) consists of sensors that are deployed underwater for gathering information for the unexplored parts of oceans or rivers. UWASN consists of variable number of floating and anchored sensors, sink and vehicles that are deployed over an area to be explored. The characteristics of UWASN are mainly node mobility for floating, capacity for data collection and...
We consider a wireless sensor network (WSN) where each sensor node samples a random signal, places the digitized data in a buffer, and transmits the data to an access point (AP) through a wireless packet erasure communication link. The AP communicates the data to a processing center (PC) located in the cloud. Our objective is to maximize the delivery of raw data to the cloud for post- processing given...
We propose an optimization framework to perform resource allocation in virtual sensor networks. Sensor network virtualization is a promising paradigm to improve flexibility of wireless sensor networks which allows to dynamically assign physical resources to multiple stakeholder applications. The proposed optimization framework aims at maximizing the total number of applications which can share a common...
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