A relative positioning system for co-located mobile devices (original) (raw)

A Relative Positioning System for Spatial Awareness of Co-located Mobile Devices and Users

2000

If a mobile computer knows how it is positioned and oriented in relation to other mobile devices nearby, then it can provide en- hanced support for multi-device and multi-user interactions. Exist- ing systems that provide position information to mobile computers are reliant on externally deployed infrastructure, such as beacons or sensors in the environment. We introduce a novel system, Re-

Ubiquitous Positioning and Mobile Location-Based Services in Smart Phones

2012

Ubiquitous positioning and mobile location-based services in smart phones / Ruizhi Chen, editor. p. cm. Includes bibliographical references and index. Summary: "This book explores new research in smart phones with an emphasis on positioning solutions in smart phones, smart phone-based navigation applications, mobile geographical information systems, and related standards"-Provided by publisher.

A hybrid positioning system for technology-independent location-aware computing

Software: Practice and Experience, 2009

Location-aware computing is a form of context-aware mobile computing, that refers to the ability of providing users with services that depend on their position. Locating the user terminal, often said positioning, is essential in this form of computing. To this aim, several technologies exist, ranging from personal area networking, to indoor, outdoor and up to geographic area systems. Developers of location-aware software applications have to face with a number of design choices, that typically depend on the chosen technology.

User positioning system for mobile devices

2013 Federated Conference on Computer Science and Information Systems, 2013

In the recent years, the Global Positioning System (GPS) has become a standard for the location and navigation for a huge number of people all over the world. This system is unquestionably one of the most significant developments of the twentieth century. GPS employs a great variety of applications from car navigation and cellular phone emergency positioning even to aeronautic positioning. Despite the fact that it plays an essential role in today's world, GPS has some limitations. The main disadvantage is the inability to operate inside the buildings because of the loss of signal from the satellites. During the last decade, the interest in location based services has significantly increased. It is related to the existence of ubiquitous computers and context awareness of mobile devices. Information about the position plays the great role in the field of security, logistics and convenience nowadays. Thus, it is necessary to fill the gap at the point where Global Positioning System does not perform satisfactorily.

Positioning support in pervasive environments

…, 2006

In order to implement reactive and proactive functionalities in a pervasive environment, contextual data must be processed. One of the most important features of the context is the position of the users and the devices. In this paper, we describe a method to determine the position of a WiFi enabled device. The prediction is based on the signal strength of the available access points. The prediction model is built from a database containing the signal strength measured in some known locations. The result is the name of the room/office where the device is localised. We also present a usage scenario, in which the user/device position is used to start proactive actions in our pervasive service environment called PerSE.

The Cricket location-support system

2000

This paper presents the design, implementation, and evaluation of Cricket, a location-support system for in-building, mobile, locationdependent applications. It allows applications running on mobile and static nodes to learn their physical location by using listeners that hear and analyze information from beacons spread throughout the building. Cricket is the result of several design goals, including user privacy, decentralized administration, network heterogeneity, and low cost. Rather than explicitly tracking user location, Cricket helps devices learn where they are and lets them decide whom to advertise this information to; it does not rely on any centralized management or control and there is no explicit coordination between beacons; it provides information to devices regardless of their type of network connectivity; and each Cricket device is made from off-the-shelf components and costs less than U.S. $10. We describe the randomized algorithm used by beacons to transmit information, the use of concurrent radio and ultrasonic signals to infer distance, the listener inference algorithms to overcome multipath and interference, and practical beacon configuration and positioning techniques that improve accuracy. Our experience with Cricket shows that several location-dependent applications such as in-building active maps and device control can be developed with little effort or manual configuration.

An open source approach to wireless positioning techniques

2007

There are several problems encountered when trying to determine the location of a mobile phone, including whether you are in an urban or rural environment. Also, it is well known that some positioning technologies work better than others depending on the environment they are in. For example, GPS works well in rural areas but not as well in urban areas, GSM positioning accuracy can be acceptable in urban areas with the right triangulation technology, but is less accurate in rural areas. Positioning with other technologies such as WiFi, Bluetooth, and Semacode all have their own advantages and disadvantages as well, depending on the overall environment in which they are used. One research task of the ICiNG project is to address these issues and introduce the next logical step for freely available mobile positioning, advancing the pioneering work done by Place Lab at Intel. The EU-FP6 ICiNG project component that initiates this advance is called the ILC (ICiNG Location Client). The ILC integrates all the above location finding technologies into one positioning module. This paper outlines the technique we developed to combine these technologies and the architecture used to deploy them on a mobile phone. With all these technologies finally available on one device, it is now possible to employ a personal positioning system that can work effectively in any environment. Another important advantage of the ILC is its ability to do this without any direct communication with outside sources, so users need not worry about "big brother" tracking their every movement. The ILC only "listens" for, and makes use of, radio signals that are freely available in the current environment, and does not actively connect to any external network or other services to triangulate its position.

Survey of position location techniques in mobile systems

Proceedings of the 7th international conference …, 2005

The growth of mobile technology has made recording of user's location possible. The systems that intent to use location in order to register user's movement and to use the generated data for extracting useful knowledge define a new area of research that has technological as well as theoretical underpinnings. Many location based systems have been developed until now and some first directions and experiences have emerged. In this paper we focus on how some representative examples of these systems collect location information, what parameters use for tracking location and motion, how they model location, and thus tendencies appear on locating persons and objects.

A survey on location systems for ubiquitous computing

2007

Emerging ubiquitous computing applications must know where things are physically located. To meet this must, many different location systems and technologies have been developed. In this thesis, we discuss the basic techniques used for location detection, describe ...

Location awareness for everyday smart computing

2009 International Conference on Telecommunications, 2009

Rapid advances in the area of digital systems is an enabler for ubiquitous computing making devices smaller and smarter and paving the way for an interconnected digital world. The most influential digital technology that has changed the lives of so many people and made the interconnected world a possibility is undoubtedly the development of wireless cellular communications. In the early stages of cellular wireless telephony development there was only one idea in mind: communication between people without the need for wires. The hexagonal cellular principles laid out by Ring and Young at AT&T Bell Labs in 1947 were the initial steps towards realizing the goal of ubiquitous communication. Global cellular networks, now serving more than 4 billion people around the world is a true testimony to the visions of many computer pioneers such as Mark Weiser, past CTO of Xerox PARC, who first coined the term, ubiquitous. Thus internetworking of "things" gains particular importance with the wide availability of smart devices capable of performing tasks well beyond voice communication. One key component of ubiquitous computing is "location awareness" and is a field of intensive research for various applications requiring varying levels of accuracy. This paper briefly discusses the basics of common location technologies and focuses on cellular based positioning and its practicality for location awareness for everyday smart gadgets.