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The resource sharing of wireless sensor networks (WSNs) under the Internet environment is one of the key issues to be solved for the application of WSNs. It proposed a Web Services based sensor network architecture, which can enlarge the application domain and increase the scalability and maintenance of current solutions. In the scheme, users can conveniently access WSNs via web browser at anytime...
Location information is very crucial for the sensing data in wireless sensor networks (WSN). But localization precision and cost are two challenging problems for practical localization applications. We proposed a novel algorithm to tackle these challenges. Our collaborative sparse-anchored scheme, CSA, utilizes multi-hop anchors collaboration to improve localization accuracy and ratio, especially...
The main property of wireless sensor networks is limited resource, especially energy. To solve this problem, RCHR (regional clustering hierarchical routing algorithm), a regional-centralized cluster formation algorithm for routing algorithm is proposed. The centralized algorithm will be used at the beginning to overcome the defect that the clusters distribute unevenly. After this round, a regional...
Give a new arithmetic of variable round mechanism to reduce the cluster-heads' death in a round. We analyze the classical hierarchical clustering protocol LEACH, and discuss the existed routing protocols based on LEACH and present their problems. Finally we introduce a new a variable round mechanism. A simulation comparison is made between the traditional constant round and the variable round mechanism...
In this paper.a wireless sensor network node hardware and software implementation is introduced based on the top grade 8-bit AVR micro-processor ATmegal28L and 2.4 GHz wireless communication chip CC2431. To avoid the shortage of TinyOS, an improved task schedule flow is introduced. Some sensors are used to provide necessary sensing ability. Proper protocols are adopted in MAC and network layers to...
This paper discusses placement of sensor nodes in wireless sensor networks. Since the large number sampling points in sensing range of the sensor, the traditional methods, such as greedy algorithm or linear programming model, do not work well. Thus, we create a new method, the grid-based algorithm. First we determine the number of the selected sensor nodes based on the probability theory. Then an...
This paper describes a dynamic distributed monitoring scheduling algorithm (SOMSA) for sensor networks based on artificial neural-networks self-organizing maps algorithm. During the training, the stable sensor nodes compete and cooperate with their neighbors to study the input patterns of the environment and update their internal prototype vectors using only local sensing and interactions. The adjustment...
Wireless sensor networks (WSN) have received a lot of attention recently due to their wide range of applications in military as well as civilian operations. It is a challenging work to design suitable cryptography for wireless sensor networks since the limitations of power, computation capability, and storage resources. Many schemes based on symmetric or public key cryptography have been investigated...
This paper discussion the designing of UWB (ultra wideband) wireless sensor network (WSN) location measure, traditional GPS position estimation is not suitable due to cost, so a improved TOA (time of arrival) estimation which based on Adaptive Noise Cancellation method is proposed in order to design a low-calculation and high precision estimation algorithm. Adaptive Noise Cancellation (ANC) system...
Wireless sensor network (WSN) consists of tiny nodes with sensing, actuating, computation, wireless communications capabilities. Because of node's limited energy, many routing, topology control, media access control (MAC) protocol have been specially designed. This paper discussed power management of topology control, media access control protocol and routing protocol in wireless sensor network. Based...
This article studys the reliability of communication of single hop link between neighboring nodes. To research the integrality of flooding routing, a mathematical model is built by means of Markov chain and possibility, then we provide an algorithm for reliability of a whole wireless sensor network via the theoretical deduction. It solves the problem of forecasting reliability of communications of...
This paper presents an application platform for heterogeneous wireless sensor networks (WSNs) and a management architecture to this network. The purpose of this platform is to provide both academia and industry a large-scale experimental environment to test and to verify their newly developed WSN systems in the future. In a first step two types of application scenario have been depicted. The next...
Because of the limited battery power of wireless sensor network node, energy conservation is a key issue. This paper improves LEACH algorithm. Through taking into account the energy state and one-hop neighbor nodes of nodes, the improvement algorithm optimizes cluster head selection, and effectively reduces the possibility that the low energy or poor location nodes are elected the cluster heads, further...
Based on Cheng-Liu-Wang identity-based signature scheme and Baek-Zheng pairing-based verifiable secret sharing scheme, a new secure monitoring scheme using identity-based threshold signcryption scheme for wireless sensor networks is proposed. The goal of this scheme is to provide a confidential and authenticated transmission channel for monitoring messages sent by nodes to BS over an insecure wireless...
Collaborative signal processing cluster-based for target tracking in wireless sensor network is proposed in this paper. Node clustering is a useful approach to reduce the communication overhead and develop data fuse in wireless sensor networks. Each sensor node, which has incomplete information about its dynamic and uncertain world, must respond to sensed events within time constraints. The aim of...
As a classic protocol based on the MAC protocol in wireless sensor networks, the S-MAC protocol has been arousing the people's widespread interests. From the view of energy efficiency and large simulation test, this paper analyses the relationship between traffic load and duty cycle in S-MAC and gets the relationship on known MAX energy efficiency. According to the relationship, this paper proposes...
Geographic routing has been considered as an efficient, simple, and scalable routing protocol for wireless sensor networks since it exploits pure local location information instead of global topology information to route data packets. Geographic routing requires the sources nodes to be aware of the location of sinks. Most existing geographic routing protocols merely assume that source nodes are aware...
In recent years, wireless sensor networks (WSNs) have been an interesting and important research area. Many routing protocols for WSNs have been designed for various objectives. In this paper, a novel energy-aware routing protocol in WSNs is proposed for achieving high energy-efficiency which prolongs the network lifetime and is one of the most important requirements for applications of WSNs. Additionally,...
In this paper, a novel cluster based adaptive MAC protocol for wireless sensor networks (WSN) is proposed, which is based on clustering network topology. In the proposed MAC protocol, sensor nodes can adjust the duty cycle freely according to traffic information collected by cluster head node. Meanwhile, by exploiting cross-layer routing information, sensor nodes can reduce the active period if no...
In recent years, wireless sensor networks have been an interesting and important research area. The time synchronization is an important problem for wireless sensor networks. In this paper, a novel time synchronization scheme based on spanning tree for wireless sensor networks is proposed. First, we create a spanning tree of all the nodes in the network by broadcasting children-find packets. Then,...
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