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 order to meet the needs of wireless seismic data acquisition, three development researches namely wireless seismic data acquisition, wireless data transmission network, and seismic acquisition control center system are carried out in this paper. For the requirements of wireless transmission of seismic exploration data, the heterogeneous wireless transmission network based on regional clustering...
To build an experimental platform for wireless sensor networks based on 802.11 high rate data transmission protocol, AODV-UU and DSR-UU high rate routing protocols are implemented on the Smart210 development board with embedded Linux operating systems in this paper. In a real static environment, the average end to end delay, packet loss rate and throughput of the network system are tested and compared...
Using wireless sensor network to monitor agricultural environments can provide decision support for precision agriculture. In this paper, combined with the sensor networks, mobile networks and remote database technology, a farmland environmental monitoring platform was designed and built, which can simultaneously monitor eight environmental parameters, such as atmospheric temperature, atmospheric...
Greedy forwarding fails when a routing void is encountered in geographic routing. To solving the routing void problem, high control packet overhead and transmission delay are usually taken in wireless sensor networks. Inspired by the edge topology without routing void, an efficient bypassing void routing protocol based on virtual coordinate mapping is proposed in the paper. The basic idea of this...
In wireless sensor networks (WSNs), many applications require a high degree of reliability with low delay. Due to the lossy nature of wireless channels, achieving reliable communication can be very challenging. The most commonly adopted approach for achieving reliability is the acknowledgment based retransmission mechanism; however, this approach is inefficient in terms of end-to-end delay especially...
Mobile sink has been a significant means to prolong the lifetime of Wireless Multimedia Sensor Networks (WMSNs). However, the mobility of the sink makes the modeling of the WMSNs lifetime a more complex issue. Considering the new properties introduced by a mobile sink, this paper proposed a novel model to define the lifetime of WMSNs with a mobile sink based on energy by taking into account the heterogeneity,...
This paper reviews the existing lifetime models of Wireless Sensor Networks (WSNs) and Wireless Multimedia Sensor Networks (WMSNs) as well as the additional factors influencing the lifetime of WMSNs compared with conventional WSNs. Considering the relationship between individual sensors and the whole network, the importance of each sensor based on its position and the number of alive nodes is given...
We study the scaling law of lifetime of ordinary clustering time-hopping impulse radio ultra-wideband (TH-IR UWB) sensor networks which n sensor nodes are distributed according to a Poisson point process. In this paper, we study the random network of a general node density λ λ∈[1,n], rather than only study either random dense network (λ=n) or random extended network (λ=1). The results demonstrate...
An energy-aware data gathering protocol called EADGP that maximizes the network lifetime for wireless sensor networks is proposed in this paper. EADGP introduces a novel distributed hierarchical clustering method. In order to reduce energy consumption and realize load balance, a new cost metric and a metric-mapping function is presented during the cluster head selection phase. Unlike traditional energy-based...
Clustering provides an effective way for data gathering in wireless sensor networks. In practice applications, either the difference of energy consumed by sensor nodes or node redeployment leads to the energy heterogeneous networks. This paper proposes a new distributed Low-Energy node Protection Time-driven Clustering algorithm (LEPTC) for heterogeneous wireless sensor networks, in which nodes are...
It has been demonstrated that clustering is an effective technique to meet the energy constraint problem of wireless sensor networks. Low-energy adaptive clustering hierarchy (LEACH) is a well known cluster-based routing protocol. However, the number of cluster heads produced by LEACH in each round varies in a large range around the optimal value, which shortens the lifetime of the network. In this...
The lifetime is a critical parameter for wireless sensor networks, which is defined as the maximum time of delivering certain data to the sink node before sensor node runs out of energy under an initial energy is given. In this paper, we propose a distributed algorithm for data gathering in wireless sensor networks with the assistance of network coding, such that the network lifetime is maximized...
Considering three dimensional time hopping ultra wide band (TH-UWB) sensor networks with n sensor nodes uniformly and independently distributed in a cube of unit volume, the asymptotic lower bounds on the lifetime of non-cluster-based and cluster-based three dimensional TH-UWB sensor networks are derived irrespectively. For static three dimensional TH-UWB sensor networks, our finding is that the lower...
It is essential for UWB wireless sensor networks to have energy efficient medium access control (MAC) protocol due to sensor nodes with highly energy constrained. In this paper, a novel energy efficient MAC protocol for UWB cluster-based wireless sensor networks is proposed. Our proposed MAC protocol makes use of some parameters of physical layer of UWB, such as the number of pluses per data bit,...
The operational lifetime is a critical parameter for time hopping ultra wide band (TH-UWB) wireless sensor networks, which is defined as the maximum number of times the task of delivering certain data to the sink node can be repeated before some sensor node runs out of energy under an initial energy at each sensor node is given. With n identical randomly located sensor nodes on a disk of area S and...
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.