Neighborhood Localization Method for Locating Construction Resources Based on RFID and BIM

Construction sites are changing every day, which brings some difficulties for different contractors to do their tasks properly. One of the key points for all entities who work on the same site is the location of resources including materials, tools, and equipment. Therefore, the lack of an integrated localization system leads to increase the time wasted on searching for resources. In this research, a localization method which does not need infrastructure is proposed to overcome this problem. Radio Frequency Identification (RFID) as a localization technology is integrated with Building Information Modeling (BIM) as a method of creating, sharing, exchanging and managing the building information throughout the lifecycle among all stakeholders. In the first stage, a requirements’ gathering and conceptual design are performed to add new entities, data types, and properties to the BIM, and relationships between RFID tags and building assets are identified. Secondly, it is proposed to distribute fixed tags with known positions as reference tags for the RFID localization approach. Then, a clustering method chooses the appropriate reference tags to provide them to an Artificial Neural Network (ANN) for further computations. Additionally, Virtual Reference Tags (VRTs) are added to the system to increase the resolution of localization while limiting the cost of the system deployment. Finally, different case studies and simulations are implemented and tested to explore the technical feasibility of the proposed approach

Mobile user positioning in public land mobile networks by using methods based on support vector machines.

Tokom prethodnih godina, potreba za podrškom sve većeg broja LBS (Location Based Services) servisa dovela je do intezivnog razvoja tehnika za pozicioniranje mobilnih korisnika (objekata) u radio sistemima. Pri tom, zahtevi koje sistemi za pozicioniranje treba da ispune, prvenstveno po pitanju tačnosti, ali i po pitanju kašnjenja, dostupnosti servisa, kompleksnosti i cene implementacije, postaju sve strožiji...Over the last years, the necessity of providing the support for various Location Based Services (LBS) has led to the intensive development of the techniques for mobile user (objects) positioning in radio systems. At the same time, the requirements that need to be fulfilled by the positioning technique in terms of accuracy, latency, availability, complexity and implementation costs, are getting higher..