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 wireless sensor research a benchmarking environment where multiple platforms, network topologies, and commu nication protocols with changing parameters can be easily described, tested and evaluated under different circumstan ces in a controlled and reproducible way would be a swiss army knife in one's hand. Such an environment could reveal the effectiveness or the bottleneck of networks and proto...
The sensor network consist of multi-purpose of node in a scarred networks area. The modern motes that have multiple sensor board on a single radio board, which have different type of transmission rate, required bandwidth, packet loss, delay demands etc. In this paper we proposed Heterogeneous Congestion Control Protocol(HCCP), which controls the efficient rate for heterogeneous traffic. This protocol...
Wireless Networked Control Systems (WNCSs) require a special attention on communication protocols used to exchange time-constrained messages. The native IEEE 802.15.4 standard does not implement mechanisms capable to control the service offered by network. This paper proposes a solution enabling to prioritize the messages based on the blackburst mechanism. An analytic study on worst-case response...
The employment of device monitoring, diagnosis and condition-based maintenance is one of the potential approaches for enhancing operational efficiency and reducing energy consumption of industrial machines. Industrial wireless sensor networks (IWSNs) for device monitoring are appealing to industry due to their inherent advantages compared with traditional wired systems, such as low cost, convenience...
In this paper, a MAC architecture designed by our institute based on high performance FPGA has been introduced. We also propose a firmware design scheme of the mobile support mechanism. Compared with other designs, the proposed structure improves the system integrated level and is easy for future enhancements. The implementation scheme of the mobile support mechanism in this paper can also be adopted...
This paper provides a qualitative analysis of cross-layer approaches in wireless sensor networks. It begins by presenting two approaches in cross-layer design. The first one focuses on the existence of an auxiliary communication link between the layers - here the OSI layered-approach is being implied - in order to support the exchange of information which is useful for adaptation. The approach itself...
Wireless Sensor Networks are used in domains such as medical monitoring, homeland security, industrial automation and military applications, therefore it is very critical to protect the network against malicious attacks. This paper presents a new security protocol that provides conversation authentication, integrity, intrusion prevention and anti-replay protection. The protocol uses two methods in...
In recent years, data gathering has received significant attention as an application of Wireless Sensor Networks (WSNs). Staggered data tree based protocols have been shown to be successful in reducing energy consumption in data gathering scenarios. An important part of staggered protocols is the process of schedule construction. In order to minimize energy consumption, this process must be fast....
Due to their embedding into an unknown environment, wireless sensor networks are susceptible to adverse environmental conditions. A prime example is external interference, typically caused by 802.11, electric devices or co-located sensor networks, which can drastically influence communication. However, radios on sensor nodes provide multiple channels, which can help to alleviate interference problems...
An upstream congestion control (UCC) protocol based on cross-layer design is proposed to reduce packet losses and energy waste due to a large number of retransmissions and packet drops. The UCC protocol takes advantage of unoccupied buffer size and traffic rate at MAC layer as congestion level indication, and based on which, every upstream traffic rate is adjusted at network layer with its source...
In this paper, we propose an optimal data forwarding strategy to minimize sleep duration time for one-dimensional wireless sensor networks with energy harvesting sensor nodes. Based on the values of remaining energy and harvested energy of sensor nodes, the base station (data sink) determines the sleep duration time and the data forwarding strategy for the next data gathering round. According to the...
In wireless sensor network research, simulation is one of the most important approaches to evaluate system or protocol performance. The accuracy of estimated results depends on selected simulation parameters. In existing analysis on wireless sensor network, simple interference models are used in simulations, which only take interference signals from nodes in a particular range into account. Based...
Most sensor networks do not support QoS or heterogeneity. As a result, current sensor networks are not suited for next-generation applications, such as wireless building automation, process control or medical applications. In this paper, we present an alternative architecture wherein the system is responsible for packet creation and packet manipulation. To support QoS, energy-efficiency and heterogeneity,...
Power consumption, latency, and complexity are considered to be a benchmark for comparing Medium Access Control (MAC) protocols in Wireless Sensor Networks (WSN). However, the importance of these elements varies according to the application. In this paper, three MAC protocols are proposed for forest fire detection. Basically, two of these protocols are based on the Carrier Sense Multiple Access with...
In this paper, we propose a game theoretic framework for a new approach for MAC design with prioritized event reporting in sensor networks. The MAC priority classes are adaptively assigned based on accuracy of location information for individual sensor nodes, and on data correlation structure. We show that for the proposed MAC solution, the event reporting results in more accurate and faster localization...
In wireless sensor networks (WSN), individual sensor nodes are inherently unreliable and have very limited capabilities to ensure real-time properties. In fact, one of the most predominant limitations in wireless sensor networks is energy consumption, which hinders the capacity of the network to provide real-time guarantees (e.g. low duty-cycles, low transmission range). Many approaches have been...
In this paper, we provide a general framework of distributed medium access control (DMAC) and synchronization for ad-hoc sensor networks with omni-directional antennas. Compared to existing works that focus on minimizing the energy consumption, our design objectives aim to increase the throughput, to lower the latency, and to solve hidden and exposed nodes problem in a traffic-heavy and dynamic environment...
Multicast routing protocols typically rely on the a-priori creation of a multicast tree (or mesh), which requires the individual nodes to maintain state information. In sensor networks where traffic is bursty, with long periods of silence between the bursts of data, this multicast state maintenance adds a large amount of overhead for no benefit to the application. Thus, we have developed a stateless...
We consider transmission scheduling by medium access control (MAC) protocols for energy limited wireless sensor networks (WSN) in order to maximize the network lifetime. Time-varying opportunistic protocol (TOP) for maximizing the network lifetime is proposed. By executing TOP each sensor exploits local channel state information (CSI) and local residual energy information (REI). TOP implements opportunistic...
Media access control (MAC) protocols of wireless sensor networks (WSNs) must minimize the radio energy costs in sensor nodes. Latency and throughput are also important design features for MAC protocols in the current WSNs applications. But most of them cannot guarantee quality for real-time traffic. This paper studies the state of the art of current real-time MAC protocols, and then introduces a medium...
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.