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In recent years, the wireless sensor network (WSN) has become more and more popular, and the problem of WSN localization has attracted great attention. In non-line of sight (NLOS) propagation conditions, the localization is less accurate than in line of sight (LOS) propagation conditions because of the buildings between the mobile station and the base station obstruct the spread of waves. In order...
In emergency situations such as fires in homes and offices, it is often the case where members of a response team (eg. firefighters) are not able to locate each other due to fire and smoke. It is desirable to have a system which is able to locate all personnel such that a team leader can monitor their location and to enable the firefighters themselves to know their proximity to other firefighters...
This paper introduces joint neighbor discovery (ND) and coarse time-of-arrival (ToA) estimation in wireless sensor networks (WSNs) via orthogonal frequency-division multiple access. In the proposed technique, each sensor node exploits at least one orthogonal sub-carrier as its allocated signature, to respond the ND and ToA estimation requests transmitted by target nodes. The target node utilizes the...
Anchor plays a very important role in range-based localization algorithm. In order to solve disadvantages of traditional localization algorithm based on anchors, this paper proposes a new anchor-based localization algorithm for wireless sensor network. It optimizes anchors and creates an optimized anchors database. Anchors are chosen from the optimized anchors database to measure the distance between...
The received signal strength indication is usually used to measure the distance between two nodes. There are random errors and outliers in the received signal strength indication. In order to overcome the two ranging error on the positioning accuracy of localized nodes in wireless sensor network. In this paper, the characteristic of the analysis of two errors is proposed based on a weighted value...
RSSI is widely used to measure the distance in the location of wireless sensor network. There are random errors and outliers in the RSSI signal. Usual algorithms cannot be used to delete the influence of the mixed errors. A location method is proposed for which removal of RSSI ranging error mixed in this paper on the analysis of error. The proposed method can delete outliers and filter random errors,...
The demand for economical wireless sensor nodes have been increased due to advancement in processor, memory and wireless communication techniques. To give the on time and fast response for different actions, wireless sensor nodes work together in cooperation with each other. The most important requirement to maintain the co-ordination among different nodes during execution of an application is perfect...
Because of complex and harsh environments in the underground mine, the localization accuracy of wireless sensor network node in coal mine has been greatly affected. So a new weighted centroid localization algorithm in coal Mine wireless sensor networks based on RSSI algorithm was proposed. Based on the full study of the underground wireless signal transmission attenuation model, RSSI algorithm to...
The growing interest towards green and efficient use of electrical energy has recently pushed the industry of street light control systems. In the past, very simple on/off switching mechanism based on daylight sensing and cyclic preventive maintenance procedures were adopted. Nowadays, intelligent control systems offering remote supervision have strongly contributed to a change in perspective in maintenance...
Small-size, light-weight, flexible and programmable, yet low-cost sensor node is one of the keys to enable Wireless Sensor Network (WSN) research and a wide range of user applications. In this paper, the Bracelet computer is presented. The system is designed to be flexible and wearable that it supports a range of daughter boards of user's choice, and provides different ways for the boards to be connected...
In this paper, we provide a study of applying location aware wireless sensor network system for tracking movements and gathering sensor data from sports team players. A set of system design requirements are developed that cover the design of the sensor network system, the hardware design of the mobile nodes, the design of the position algorithm, the design of communication protocols, and the design...
Localization is one of the most challenging and important issues in wireless sensor networks (WSNs), especially if cost-effective approaches are demanded. Range estimation is essential in many sensor network localization algorithms. Although wireless sensor systems usually have available received signal strength indication (RSSI) reading, but RSSI is susceptible to external influences, performances...
The location technology in wireless sensor network (WSN) is always the focus of research scholars at home and abroad. Based on an improved simulated annealing algorithm, this paper presents a novel WSN node localization algorithm. And the basic principle and the implementing approaches of the algorithm are emphatically introduced. Simulation results demonstrate that good position performance is achieved...
Distance measurement based on RSSI, featuring low communication overhead and low complexity, is widely applied in the range-based localization of the wireless sensor networks. We first analyze the theory of distance measurement based on RSSI and the influence of environment on RSSI, and then we propose three experimental data processing methods. After using the ZigBee-based hardware platform to test...
Cross-layer adaptation offers the possibility to optimize resource utilization in wireless sensor networks with respect to application-specific performance metrics. In this paper, a transmission power allocation algorithm is presented that is adapted to distributed detection in wireless sensor networks with soft decision fusion. Specifically, the objective is to minimize the global probability of...
The intrusion detection system (IDS) of Wireless sensor networks (WSNs) can acquire information related to the attack techniques, helping in the development of prevention systems. In this work we propose an IDS that is based on Small-world networks and that also fits the demands and restrictions of WSNs.
As pervasive interconnection of autonomous sensor devices gave birth to a broad class of exiting new applications, security emerges as a central requirement. Wireless sensor networks are vulnerable to attacks as they are frequently deployed in open and unattended environments. In this paper, we describe the wormhole attack, a severe routing attack against sensor networks that is particularly challenging...
This paper presents the localization of a mobile robot while simultaneously mapping the position of the nodes of a Wireless Sensor Network using only range measurements. The robot can estimate the distance to nearby nodes of the Wireless Sensor Network by measuring the Received Signal Strength Indicator (RSSI) of the received radio messages. The RSSI measure is very noisy, especially in an indoor...
Wireless Sensor Networks (WSNs) provide an effective means to perform data acquisition in remote areas. However, limitations exist that prohibit their widespread use. In this paper, an object tracking algorithm based on Artificial Immune Systems (AIS) is proposed. Based on the immune network theory of AIS, the activities of wireless sensor nodes are stimulated by target in-coming objects but suppressed...
A wireless sensor network consist of spatially distributed autonomous sensor nodes for data acquisition. Accurate localization of sensor nodes is a strong requirement in a wide area of applications. This paper describes the localization of sensor nodes using range measurements and trilateration with the Extended Kalman Filter. The commercially available nanoLOC sensor network is utilized for range...
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