Tareq Alhmiedat

A ZigBee-based mobile tracking system through wireless sensor networks

Wireless sensor networks have been deployed widely. Sensor networks involve sensor nodes which are very small in size, low in cost and have a short battery-life. One of the critical wireless sensor network applications is localisation and tracking mobile sensor nodes. ZigBee is a new emerging technology for low rate, low power and low range communication networks, which aims to provide long battery life for network devices. In this paper, we discuss various localisation and tracking techniques and categorise these techniques based on the communication between nodes in centralised and decentralised localisation systems. We propose a decentralised ZigBee-based tracking system to detect and track the location of mobile nodes indoors based on the received signal strength (RSS). The proposed tracking system is a range-free system, which does not require additional hardware, depends on a new weight function, and can be deployed wherever the node density is low. The tracking system is implemented by ZigBee sensor devices, and experiments are done to evaluate the proposed tracking system based on accuracy and communication cost.

A Study on Threads Detection and Tracking Systems for Military Applications using WSNs

In Wireless Sensor Network (WSN) applications it is critical to accurately determine the location of the distributed sensor nodes in order to report the data that is geographically meaningful. Since localization and tracking algorithms have been attracting research and development attention recently, a wide range of existing approaches regarding this topic have emerged. Tracking and localization algorithms have been proposed for different WSN applications including civilian, industrial and safety applications. A few research studies focused on tracking Threats through military applications, such as detecting and tracking Threats through border security area. Therefore this paper studies and investigates the existing WSN based tracking and localization algorithms and summarizes the potential requirements for localizing and tracking Threats through military applications. The existing systems are categorized and discussed. A critical analysis is found in this paper, in order to guide the developer to design and implement a WSN-based tracking system for military applications.

Tracking multiple mobile targets based on the ZigBee standard

Target localization and tracking problems in Wireless Sensor Networks (WSNs) have received considerable attention recently, driven by the necessity to achieve a higher localization accuracy, a lower cost, and a smallest form factor. Despite the interest on target tracking and localization issues, there are few systems deployed using ZigBee network standard, and there is no tracking system that has used the full roles for ZigBee network standard. Tracking through the ZigBee network standard is a challenging task when the density of router and end-device nodes is low, due to the limited communication capabilities of end-device nodes. This paper addresses the research challenges in localization and tracking of multiple mobile targets through the implementation of a ZigBee based real-time surveillance applications. The proposed system is a power-efficient system that does not require any additional hardware devices, and can be deployed where the density of beacon nodes is low. This proposed tracking system can be applied in various indoor applications, such as military, civil, and health applications.

An imporved decentralized approach for tracking multiple mobile targets through ZigBee WSNs.

Target localization and tracking problems in WSNs have received considerable attention recently, driven by the requirement to achieve high localization accuracy, with the minimum cost possible. In WSN based tracking applications, it is critical to know the current location of any sensor node with the minimum energy consumed. This paper focuses on the energy consumption issue in terms of communication between nodes whenever the localization information is transmitted to a sink node. Tracking through WSNs can be categorized into centralized and decentralized systems. Decentralized systems offer low power consumption when deployed to track a small number of mobile targets compared to the centralized tracking systems. However, in several applications, it is essential to position a large number of mobile targets. In such applications, decentralized systems offer high power consumption, since the location of each mobile target is required to be transmitted to a sink node, and this increases the power consumption for the whole WSN. In this paper, we propose a power efficient decentralized approach for tracking a large number of mobile targets while offering reasonable localization accuracy through ZigBee network.

An adaptive indoor positioning algorithm for ZigBee WSN

The areas of positioning and tracking through Wireless Sensor Network (WSN) have received considerable attention recently driven by the requirement to obtain high positioning accuracy with minimum cost possible. A wide range of proposed approaches regarding the positioning area have emerged, however most of them suffer from either requiring an extra sensor, high power consumption, inaccessible indoors, or offer high positioning error. This paper presents a research and development of an adaptive positioning system for ZigBee WSN based on the Received Signal Strength (RSS) system. The proposed system is an efficient positioning system in both indoors and outdoors, where it offers reasonable positioning accuracy (0.1 - 0.6) meters, and achieves low power consumption. The proposed system has been validated through a number of real experiments using XBee modules.

A hybrid tracking system for ZigBee WSNs

Target localization and tracking problems in Wireless Sensor Networks (WSNs) have received considerable attention recently, driven by the need to achieve high localization accuracy, with the minimum cost possible. A wide range of proposed approaches regarding the localization area have emerged, however most of them suffer from either requiring an extra sensor, high power consumption, inaccessible indoors, or offer high localization error. This paper presents a research and development of a hybrid WSN tracking system using the Received Signal Strength Indicator (RSSI) and the inertial system. The proposed system is an efficient indoors, where it offers reasonable localization accuracy (0.1 - 0.7) meters, and achieves low power consumption. A number of real experiments have been conducted to test the efficiency of the proposed system using XBee modules.

An adaptive energy-efficient data collection system for ZigBee wireless sensor networks

Wireless sensor networks (WSNs) are deployed in large areas to monitor a number of events in an area of interest. Monitoring environmental events by distributed sensor networks faces the challenge of high power consumption requirement over time, due to the large number of packets required for multihop data collection. To overcome the scalability issue of large scale WSNs, a proof-of-concept implementation demonstrates that integrating a mobile robot (MR) system with a clustering system for ZigBee WSNs will significantly increase the lifetime of the system, by conserving energy that the sensor nodes otherwise would use for communication. In this paper, two energy-efficient systems have been proposed: clustering and MR systems. The former divides the ZigBee WSN into smaller regions, allocates a cluster-head for each region, and aggregates the collected data, whereas the latter collects the sensed data from cluster-heads. The effectiveness of the proposed system has been demonstrated via simulation and experimental studies and verified that, using a single robot for data collection, the lifetime of the network can be extended by 2.3 times in average.

Fulfilling needs of newly enrolled students: A cultural study of a mobilized guidance system

Mobile technology is becoming more popular around the world. The importance of such technology relates to its capability of allowing the user of performing many different Tasks simultaneously on daily basis. Nowadays, travelling from one place to another became easier than before. This is due to the availability of Electronic maps and guidance systems for different users. Despite the progress adding to the mobile application field, there are still some boundaries and limitations in using such devices. Some of the difficulties are connected directly to culture. Other difficulties are related to the lack of experience in using such technology and how far would a user trust such technology. In this research, light will be spotted on the idea of providing a guidance mobile application for the newly enrolled students to Zarqa University. Additionally, main restrictions and obstacles which limit the use of the mobile handset as a guide system will be taken into considerations. The research aim extends to studying the effect of cultural issues on the proposed system. Index terms Culture, HCI, Usability, Trust