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Network lifetime is of great importance in WBANs that significantly influences the network performance and user experience. Among all the solutions to extend the network lifetime, relay mechanism plays a crucial role. However, previous works only concentrate on energy efficiency of sensor nodes regardless of energy storage diversity among sensor nodes, which may severely limit the performance of enhancing...
The location of node is a research focus in wireless sensor networks (WSNs), and it is the foundation of the service based on the node location. In this paper, we propose a new localization method to improve the moving-baseline localization(MBL) performance by using second-order system. This method takes advantage of precise properties of MBL. We improve the localization accuracy by accurate fitting...
Geometry-based localization algorithms come to the forefront with its unique superiority. This paper proposes a Delaunay triangulation based localization scheme (DBLS), which takes use of received signal strength indicator(RSSI) from anchor nodes. Based on RSSI, the Delaunay area is generated. The unknown node determines which Delaunay area it belongs to and then record it down. After several iteration,...
In this paper, a new scheme to reduce the positioning error is investigated for wireless sensor networks (WSN). To be specific, conventional Distance Vector-Hop (Dv-Hop) algorithm fail to calculate the average distance per-hop with high precision that caused by the random distribution of the irregular network topology, greatly leading to the positioning error in the Dv-Hop algorithm. To enhance the...
With the rapid development of the internet of things, location information becomes increasingly important for various applications. However, the localization information of network devices are vulnerable to various attacks. In this paper, we propose SPIN, a scheme for location verification that allows the access point (AP) to verify credibility of a reported location from a network node. This is achieved...
Energy balance is a critical issue in wireless sensor networks. Several mixed data transmission (MDT) schemes have been proposed to achieve energy balance. However, most existing works are lack of theoretical study, especially understanding the relationship between network-wide energy balancing and lifetime optimization. In this paper, we conduct comprehensive theoretical analysis to the two-level...
In energy-harvesting wireless sensor networks, sensor nodes equipped with a harvesting device scavenge the valuable energy from ambient environments. In this paper, we consider the routing problem of jointly considering the distance, the remaining energy and energy-harvesting capability of sensor nodes with the objective to route the collected data toward the sink node by going through the high-density...
Wireless Sensor Networks (WSNs) are popular in smart homes to implement context-aware and intelligent services. Due to fixing bugs and adding new functions, the software on sensor nodes needs to be updated depending on efficient bulk data dissemination. Existing page transfer of data dissemination protocols employ pipelining technique to achieve spatial multiplexing. The conventional pipelining inefficiency,...
Over-the-air reprogramming is a key service in wireless sensor networks. The service can disseminate a new code image to every sensor node in the network. For security reasons, every code image must be authenticated to prevent an attacker from installing its code to the network. In this paper, an authentication method named Hierarchical Hash Tree (HHT) is proposed to reduce the overheads of Sreluge,...
Mixed data transmission strategies have been proposed to address the energy imbalance problem in wireless sensor networks. However, whether the energy of all nodes can be balanced by this approach, especially under the communication range constraints of sensor nodes, is lack of study. In this paper, we present a novel analytical model for the two-hop based mixed data transmission and derive its energy...
For mountain landslide, This paper proposes an intelligent early-warning system for landslides based on ZigBee network. It adopts Cortex-M3 architecture of the chip as the embedded core control processor to improve system integration, data processing capabilities, the ZigBee uses CC2530 as the hardware foundation to construct ZIGBEE wireless sensor network, and then uses GPRS as the technological...
Multi-hop over-the-air reprogramming is essential for the remote installation of software patches and upgrades in wireless sensor networks (WSNs). Recently, coding-based reprogramming protocols are proposed to address efficient code dissemination in environments with high packet loss rate. The problem of analyzing the performance of these protocols, however, has not been explored in the literature...
This paper presents an on-line pollution monitoring system to gather the real time information of the pollutant emission for the railway system which is complicated and extensively distributed. The developed system consists of monitoring nodes, sink nodes, a data center and the communication network. Interface for multiple kinds of detectors is included in the monitoring nodes. Both the separately...
Evaluation of System Effectiveness (SE) plays a significant role in network design, construction, optimization, etc. of Wireless Sensor Networks (WSNs). This paper develops a rational and comprehensive five-layer indicator model which incarnates SE or monomial efficiency of WSNs. Also, we propose a valid evaluation model HFCE with Analytic Hierarchy Process (AHP) and Fuzzy Comprehensive Evaluation...
The radar members are likely to interfere with each other if their waveforms and polarized states are not orthogonal in radar sensor network (RSN). In this paper, we propose the oblique projection polarization filtering (OPPF) based interference suppressions for RSN where each radar member is equipped with the orthogonally dual-polarized antenna (ODPA). In our discussed cooperative environment, under...
The CDS (connected dominating set) has been widely used in the topology control of wireless sensor networks. When topology changed due to the node failure or low power, most previous proposals recomputed the structure again as their initialization. This leads to an expensive energy cost which is also unnecessary. In this paper, we propose a localized MESH-CDS algorithm which maintains the structure...
Wireless multimedia sensor networks (WMSNs) are expected to find wide applicability in target tracking in the near future. This paper proposes a dynamic capacity multi-path routing protocol (DCM), based on improved Ford-Fulkerson algorithm, to solve the problem of data transmission from anchor nodes to base station (BS). By adjusting the parameter of flow capacity in max-flow model, a multi-path routing...
Recently, Wireless Sensor Networks (WSNs) begin to use the solar energy. But the energy from the environment is usually unstable, An efficient solar prediction algorithm should be studied. In this paper, a novel solar energy prediction algorithm, namely Weather-Conditioned Selective Moving Average (WCSMA), is proposed by using the trend similarity of energy harvesting and the classification of sunny...
A novel node management strategy is proposed in this paper to solve the target tracking problem for wireless image sensor networks. The node management server is responsible for forecasting the target position, selecting the node to collect image data, and broadcasting control messages to all nodes. After the node sensor receives the messages sent from the server, the node sensor will start the camera,...
In this work, we propose a collaborative image transmission based on shape matching over WMSN in field of monitoring. First, the SensEye's node model is utilized to lessen the transmission of background from the nodes. After the nodes detect a same target during shape matching, the transmission of the redundant data of the targets between nodes is eliminated. In order to reduce the delay produced...
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