Articles in the LBS Category

Sep 2010 | No Comment

Niki Regina, Matteo Zanzi

In this paper three different solutions are proposed for the problem of location-based selective broadcasting of traffic messages

Although at present its implementation within the full operational capability is under discussion and called into doubt due to recent changed circumstances in the overall system management, one of the initially planned features of GALILEO …

Apr 2010 | No Comment

The Netherlands are a small country in the North West part of Europe with a high density of population. The area of only 41.000 km² is used by 16 Mio. Inhabitants, resulting into 400 inhabitants per km². There is an excellent infrastructure with 2.300 km of motorways and 137.000 km of roads in total complemented by a network of railways and bicycle tracks. The roads are used by 8 Mio. cars and 140.000 heavy goods vehicles. Although…

Jun 2009 | Comments Off on Intelligent transport system
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Transport of people and goods is one of the pilars of civilisation. The
exchange of goods, services and ideas is in foundation of modern economy, as well as it was in the past. However, growing population generates new challenges for traffic control that leaves no space for classic solution but calls for the innovative and multidsciplinary approach based on the latest scientific and technology achievements…

Sep 2008 | No Comment
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The patented TIDGET® (“tracking widget”) sensor operates by taking brief snapshots of GPS data when activated [1]. These snapshots are stored in the flash memory and forwarded to the LocatorNet Server through the data link for processing [2]. The TIDGET is built using the RF front-end of a commercial GPS chip (see Figure 2). The device is designed to operate with a variety of different types of data links providing a low-power location solution…

Sep 2008 | No Comment
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The LBS market has been segmented into 3 main categories: • B2C: Business to Consumer • B2B2C: Business to Business to Consumer • B2B: Business to Business Details of this segmentation are provided in Figure 2. This segmentation highlights the diversity of services that can be offered by an operator. This diversity of services is also a diversity of business model. The LBS market has been especially Figure 1…

Aug 2008 | No Comment
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Mobile tools for wayfinding combined with Location Based Services (LBS) can provide pedestrians with practical information concerning optimal routes and useful facilities in their vicinity. However, what is considered as “optimal” and “useful” largely varies between different kinds of individuals. Inappropriate information may hinder effective information extraction for a person seeking specific navigational and environmental information…

May 2008 | No Comment
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Alternative location methods for absolute positioning in areas where no GNSS position determination is possible due to obstruction of the satellite signals are needed in mobile positioning. Active RFID (Radio Frequency Identification) can be used also for position determination, although the system was not only developed for positioning and tracking but mainly for identification of objects. Using RFID in positioning, different approaches can be distinguished, i.e., cell-based positioning if the RFID tags are installed at active landmarks (i.e., known locations) in the surroundings, trilateration if ranges to the RFID tags are deducted from received signal strength (RSS in RFID terms) values and location fingerprinting where the measured signal power levels are used directly to obtain a position fix. Using Cell of Origin (CoO) the achievable positioning accuracy depends on the size of the cell and is therefore usually several metres up to 10’s of metres using long range RFID equipment. Higher positioning accuracies can be obtained using trilateration and fingerprinting. In this paper the use of trilateration is investigated.

May 2008 | Comments Off on Cell-based positioning for improving LBS
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Most of today’s Location Based Services (LBS) provide information based solely on a users’ location, not taking into account context knowledge about the user’s current situation and needs. This often results in low-quality and inappropriate information to the user. Hence, in order to provide user-oriented services, an improvement of the response-quality of information requests is required. Knowledge about the coordinates of places where the user regularly stays in her life combined with semantics about such places can provide valuable knowledge for LBS. Zhou et al.

Dec 2007 | Comments Off on Using Assisted-GNSS to locate handsets in wireless networks
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There are many different types of technologies employed in calculating the location of handsets in wireless networks with various levels of success and accuracy. Assisted-GPS (A-GPS) is a positioning technology that is presently used for locating handsets in wireless networks and is gaining traction in the market. An A-GPS server provides assistance data to the handset in order for it to have a low Time to First Fix (TTFF), weak signal acquisition and optimize handset battery use. A-GPS is used as a location technology in isolation or hybridized with other positioning technologies that provide range-like measurements.

Dec 2007 | No Comment

They went up a hill to fetch a pail of water. Jack fell down and broke his bone and Jill came tumbling after… And now they need medical attention and must locate a medical center soon. How far is the nearest hospital? How do they get there from the accursed hill? What is their current location? They need location-based services (LBS). “What is LBS?” asks Jill….