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 the Wireless Multimedia Sensor Networks (WM-SNs) field, real-time multimedia flow increases the probability of collision and congestion in sensor network which degrade the performance of Quality of Service (QoS). How to meet the high QoS requirement of WMSNs applications under the condition of energy constraint is a crucial issue. In this paper, we propose a predicted available bandwidth estimation...
While using Wireless Sensor Network for monitoring the remote patient's health situations, data related to that patient is stored in the sensors and the huge amount of data results in buffer and link overflow. The buffer and link overflow causes the problem of congestion which results in loss of packet and transmission delay. Congestion is a situation in which buffer overloaded with excessive data,...
With the growing demand for wireless applications, there is an incalculable rise in bandwidth consumption that in turn leads to the spectrum scarcity. The conflict between spectrum underutilization and spectrum scarcity is solved by a well-known technology called Cognitive Radio (CR). The main aim of CR is to exploit unutilized spectrum of licensed users/Primary Users (PUs) and enable opportunistic...
Wireless sensor networks (WSN) nowadays are used in variety of applications having various quality of service (QoS) requirements. Hence they are required to provide different levels of Quality of Services based on the type of applications. As these Wireless Sensor Networks are constrained by the processing speed, memory capacity, energy more concentration is given in these area ignoring other parameters...
Ultrawideband (UWB) is a promising technology for getting high data rate communications. UWB communications refer to the utilization of signals with a frequency range (3.1 to 10.6 GHz) on the condition of having a fractional bandwidth of 20% or absolute bandwidth of 500 MHz or higher. The limited power spectral density of − 41.3 dBm/MHz allows UWB communications to be safely deployed with existing...
Greatly unexplored vastness of the ocean attracts human beings to discover knowledge in deep water. Underwater environment is a big challenge for human beings because of changeable and unknown conditions. A highly precise, real time and continuous monitoring system is extremely important for underwater aquatic surveillance, river and sea pollution discovery, oceanographic data compilation and commercial...
In wireless distributed storage systems, storage nodes are connected by wireless channels, which are broadcast in nature. This paper exploits this unique feature to design an efficient repair mechanism, called broadcast repair, for wireless distributed storage systems with multiple-node failures. Since wireless channels are typically bandwidth limited, we advocate a new measure on repair performance...
The analysis of energy efficiency of non-cooperative (single hop, and multi hop), cooperative, and hybrid transmission in multi relay based wireless sensor networks (WSNs), is done in this paper. This analysis is progressed under the influenced of target-outage probability (OP) and end-to-end throughput constraint. We have used rayleigh fading distribution in our system model. Furthermore rather than...
In this paper we consider the problem of sensor scheduling for distributed estimation with power constraint. To satisfy the requirement of energy consumption, we assume that each sensor sends data to its adjacent sensors with a given probability, where the state of the system is estimated by means of distributed estimators. First, we design optimal estimator gain to minimize the estimation error covariance...
Congestion is a significant problem that faces streaming media applications in Wireless Sensor Networks (WSN). This problem occurs when the sensor receives traffic that exceeds its maximum forwarding rate causing more packet loss, more delay and overall quality degradation. The Datagram Congestion Control Protocol (DCCP) is a congestion control protocol that works on the transport layer and is suitable...
To ensure the security of the data forwarding and requirement of QoS(Quality of Services) in wireless sensor networks, we propose an ant colony optimization-based trustful routing algorithm. The objective function includes the key factors, such as the time delay, the bandwidth and the energy consumption of the link from the source to the destination. Also, in order to optimize the path selection,...
In this paper, a novel fusion center controlled media access control (MAC) protocol for physical wireless parameter conversion sensor networks (PHY-C SN) is proposed. In PHY-C SN, the sensing information is converted to correspond subcarrier numbers of orthogonal frequency division multiplexing (OFDM) signals and sensor nodes can send sensing information simultaneously. Conventionally, each sensor...
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...
In a typical Wireless Sensor Network (WSN) application, sensor nodes gather data from the environment and convey the collected data towards the base station. It is possible to perform certain signal processing operations on raw data on each sensor node before transmission so that the amount of transmitted data bits is reduced. The amount of transmitted data usually depends on how much processing is...
The use of wireless sensor networks is very broad, and its application can be extended to a number of areas. In general, after the wireless sensor networks have been set up, there is no maintenance needed. The life cycle of the network will be limited only by the battery power supply of the sensors. Once the entire network energy consumption causes loss of balance in the system, the energy hole problem...
The Internet of Things (IoT) has inspired a myriad of real-time applications, such as robotics and human-machine interaction. Many IoT applications have significant computational requirements, while at the same time they demand very low latencies. The cloud can provide the needed resources ondemand, however often fails to meet these timing requirements. Low response time can only be realized by having...
IPv6 addressing schemes for networks consisting of power constrained wireless sensor nodes require special consideration to reduce the time and traffic required for a node to join the network. Here we explore several existing models of IPv6 address allocation schemes for this use case. We offer a novel approach to reduce the chance of address duplication via a hierarchical manipulation of the host...
A system based on Wireless Sensor Network, Mobile Robot and satellite technology has been proposed to overcome some problems in Indonesian volcano monitoring system. Fixed-mode of this mobile monitoring system for Indonesian volcano (MONICA) has been defined and shown efficiency both in power consumption and bandwidth utilization. In this research, we investigated the application of our system for...
A new combination between Wireless Sensor Network (WSN), mobile robot and satellite technology for Indonesian volcano monitoring system, Mobile Monitoring System for Indonesian Volcano (MONICA) has been developed. This system divided into two modes: fixed-mode and mobile mode. The first mode has shown a good performance. For a small event of volcano activity, the system only uses power 1 million times...
In this paper opportunities for wireless devices to harvest out-of-band RF energy are explored. Emerging multi-standard wireless communications devices such as mobile handsets currently include multiple antennas and multiple transceiver systems. Typical device usage leverages a subset of available antenna and transceiver systems at any given time. Additionally, receiver chains in use typically filter...
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.