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Location awareness refers to devices that can determine their location. Navigational instruments provide location coordinates for vessels and vehicles. Surveying equipment identifies location with respect to a well-known location wireless communications device.
Location awareness without the active participation of the device is known as non-cooperative locating or detection.
History of terminology
The term originated for configurations settings of network systems, and addressed network entities. Network location awareness (NLA) services collect network configuration and location information, and notify applications when this information changes. With the advent of global navigation satellite systems (GNSS) and radio-equipped mobile devices, the term was redefined to include consumer-focused applications.
While location awareness began as a matter of static user location, the notion was extended to reflect movement. Context models have been proposed[1] to support context-aware applications which use location to tailor interfaces, refine application-relevant data, increase the precision of information retrieval, discover services, make user interaction implicit and build smart environments. For example, a location-aware mobile phone may confirm that it is currently in a building.[2]
Determining location
Description in logical terms uses a structured textual form. International standardisation offers a common method using ISO/TS 16952[3] as originated with German standards DIN EN 61346[4] and DIN EN 81346.[5]
Location in mathematical terms offers coordinates that refer to a nominated point of reference.
Location in network terms relates to locating network nodes. These include:
IEEE media access addressing according to MAC International standard ISO/IEC 10038[8] with ISO/IEC 11802[9] and ANSI/IEEE[10] edition.
ISO procedure call addressing according to URN/UUID International standards ISO/IEC 11578[11] and ISO/IEC 9834[12] and IETF RFC4122.[13]
Variants
"Crisp" locating offers precise coordinates, using wireless signals or optical sighting, possibly[attribution needed] with phase angle measurements. Coordinates are relative to either a standardized system of coordinates, e.g., WGS84, or a fixed object such as a building plan. Real-time locating adds timely delivery of results, especially for moving targets. Real time locating is defined with ISO/IEC 19762-5 and ISO/IEC 24730-1.[14]Fuzzy locating offers less precision, e.g., presence "near" a point of reference. Measuring wireless power levels can supply this degree of precision. Less sophisticated systems can use wireless distance measurements to estimate a point of reference in polar coordinates (distance and direction) from another site. Index locating indicates presence at a known location, as with fixed RFID reader's and RFID tags.[15]
Applications
Location-aware systems address the acquisition of coordinates in a grid (for example using distance metrics and lateration algorithms) or at least distances to reference points (for example discriminating presence at a certain choke point on a corridor or in a room of a building).[16]
Navigation
Navigation and reckoning are key concerns for seafarers, aviators and professional drivers. The task is to dynamically determine the current location and the time, distance and direction to destination. radar served for regional demand and NAVSTAR satellite systems for global demand. Global navigation satellite systems (GNSS) have become ubiquitous in long-haul transport operation and are becoming a standard automobile feature.[17]
Surveying
Surveying is the static complement to navigating. It is essential for delineating land ownership and for architects and civil engineers designing construction projects. Optical surveying technology preceded lasertriangulating aids.[18]
Business process
Currently location awareness is applied to design innovative process controls, and is integral to ubiquitous and wearable computing. On mobile devices, location aware search can prioritize results that are close to the device. Conversely, the device location can be disclosed to others, at some cost to the bearer's privacy.[19]
Warehouse and routing
RFID provides a time/location reference for an object, but does not indicate that the object remains at that location, which is sufficient for applications that limit access, such as tracking objects entering and leaving a warehouse, or for objects moving on a fixed route, such as charging tolls for crossing a bridge.[20][21]
Consumer
Location awareness enables new applications for ubiquitous computing systems and mobile phones. Such applications include the automatic reconfiguration of a computing device to suit the location in which it is currently being used (examples include ControlPlaneArchived 2017-11-07 at the Wayback Machine and Locamatic), or publishing a user's location to appropriate members of a social network, and allowing retailers to publish special offers to potential customers who are near to the retailers. Allegedly, individuals gain self confidence with confirmation of current whereabouts.[22]
Infrastructure
While governments have created global systems for computing locations, independent localized systems exist at scales ranging from one building to sub-national regions.
Local
Such solutions may apply concepts of real-time locating system (RTLS) and wireless personal area network (WPAN), wireless LAN or DECT, with results in proprietary terms of floor plans or room numbers. Local systems degrade as distance from the locality increases. Applications include the automatic reconfiguration of a computing device to suit the location in which it is currently being used.
Regional
This approach uses for example mobile phone systems, such as 3GPP, GSM or LTE, typically returning information in standardized coordinates as with WGS84 in standardized formats such as National Marine Electronics Association (NMEA) for outdoor usage or in symbolic coordinates referring to street addresses.
↑ Schmidt, A.; Aidoo, K.A.; Takaluoma, A.; Tuomela, U.; Van Laerhoven, K; Van de Velde W. (1999). "Advanced Interaction in Context"(PDF). 1st International Symposium on Handheld and Ubiquitous Computing (HUC99), Springer LNCS, Vol. 1707. pp.89–101.
↑ [ISO/IEC TR 11802-2:2005 Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Technical reports and guidelines—Part 2: Standard Group MAC Addresses]
↑ Blank, T. O. (1989). "Social psychology, contexts of aging, and a contextual world view". The International Journal of Aging & Human Development. 29 (3): 225–239. doi:10.2190/WUQU-VT01-021N-GX33. PMID2634031. S2CID20706751.
Location-based service (LBS) is a general term denoting software services which use geographic data and information to provide services or information to users. LBS can be used in a variety of contexts, such as health, indoor object search, entertainment, work, personal life, etc. Commonly used examples of location-based services include navigation software, social networking services, location-based advertising, and tracking systems. LBS can also include mobile commerce when taking the form of coupons or advertising directed at customers based on their current location. LBS also includes personalized weather services and even location-based games.
Context awareness refers, in information and communication technologies, to a capability to take into account the situation of entities, which may be users or devices, but are not limited to those. Location is only the most obvious element of this situation. Narrowly defined for mobile devices, context awareness does thus generalize location awareness. Whereas location may determine how certain processes around a contributing device operate, context may be applied more flexibly with mobile users, especially with users of smart phones. Context awareness originated as a term from ubiquitous computing or as so-called pervasive computing which sought to deal with linking changes in the environment with computer systems, which are otherwise static. The term has also been applied to business theory in relation to contextual application design and business process management issues.
Near-field communication (NFC) is a set of communication protocols that enables communication between two electronic devices over a distance of 4 centimetres (1.6 in) or less. NFC offers a low-speed connection through a simple setup that can be used for the bootstrapping of capable wireless connections. Like other proximity card technologies, NFC is based on inductive coupling between two electromagnetic coils present on a NFC-enabled device such as a smartphone. NFC communicating in one or both directions uses a frequency of 13.56 MHz in the globally available unlicensed radio frequency ISM band, compliant with the ISO/IEC 18000-3 air interface standard at data rates ranging from 106 to 848 kbit/s.
LonWorks or Local Operating Network is an open standard for networking platforms specifically created to address the needs of control applications. The platform is built on a protocol created by Echelon Corporation for networking devices over media such as twisted pair, power lines, fiber optics, and wireless. It is used for the automation of various functions within buildings such as lighting and HVAC; see building automation.
Sentient computing is a form of ubiquitous computing which uses sensors to perceive its environment and react accordingly. A common use of the sensors is to construct a world model which allows location-aware or context-aware applications to be constructed.
Telematics is an interdisciplinary field encompassing telecommunications, vehicular technologies, electrical engineering, and computer science. Telematics can involve any of the following:
Ambient intelligence (AmI) is a term used in computing to refer to electronic environments that are sensitive to the presence of people. The term is generally applied to consumer electronics, telecommunications, and computing.
Object hyperlinking is a term that refers to extending the Internet to objects and locations in the real world. Object hyperlinking aims to extend the Internet to the physical world by attaching tags with URLs to tangible objects or locations. These object tags can then be read by a wireless mobile device and information about objects and locations retrieved and displayed.
Locative media or location-based media (LBM) is a virtual medium of communication functionally bound to a location. The physical implementation of locative media, however, is not bound to the same location to which the content refers.
A tracking system, also known as a locating system, is used for the observing of persons or objects on the move and supplying a timely ordered sequence of location data for further processing.
Context-aware computing refers to a general class of mobile systems that can sense their physical environment, and adapt their behavior accordingly.
Global Navigation Satellite System (GNSS) receivers, using the GPS, GLONASS, Galileo or BeiDou system, are used in many applications. The first systems were developed in the 20th century, mainly to help military personnel find their way, but location awareness soon found many civilian applications.
An indoor positioning system (IPS) is a network of devices used to locate people or objects where GPS and other satellite technologies lack precision or fail entirely, such as inside multistory buildings, airports, alleys, parking garages, and underground locations.
Wi-Fi positioning system is a geolocation system that uses the characteristics of nearby Wi‑Fi access point to discover where a device is located.
A geofence is a virtual perimeter for a real-world geographic area. A geofence can be dynamically generated or match a predefined set of boundaries.
Real-time locating systems (RTLS), also known as real-time tracking systems, are used to automatically identify and track the location of objects or people in real time, usually within a building or other contained area. Wireless RTLS tags are attached to objects or worn by people, and in most RTLS, fixed reference points receive wireless signals from tags to determine their location. Examples of real-time locating systems include tracking automobiles through an assembly line, locating pallets of merchandise in a warehouse, or finding medical equipment in a hospital.
DASH7 Alliance Protocol (D7A) is an open-source wireless sensor and actuator network protocol, which operates in the 433 MHz, 868 MHz and 915 MHz unlicensed ISM band/SRD band. DASH7 provides multi-year battery life, range of up to 2 km, low latency for connecting with moving things, a very small open-source protocol stack, AES 128-bit shared-key encryption support, and data transfer of up to 167 kbit/s. The DASH7 Alliance Protocol is the name of the technology promoted by the non-profit consortium called the DASH7 Alliance.
Spatial contextual awareness consociates contextual information such as an individual's or sensor's location, activity, the time of day, and proximity to other people or objects and devices. It is also defined as the relationship between and synthesis of information garnered from the spatial environment, a cognitive agent, and a cartographic map. The spatial environment is the physical space in which the orientation or wayfinding task is to be conducted; the cognitive agent is the person or entity charged with completing a task; and the map is the representation of the environment which is used as a tool to complete the task.
Roy Want is a computer scientist born in London, United Kingdom in 1961. He received his PhD from Cambridge University (UK) in 1988 for his work on multimedia Distributed Systems; and is known for his work on indoor positioning, mobile and ubiquitous computing, automatic identification and the Internet of Things (IoT). He lives in Silicon Valley, California, and has authored or co-authored over 150 papers and articles on mobile systems, and holds 100+ patents. In 2011 he joined Google as a senior research scientist, and is in the Android group. Previous roles include senior principal engineer at Intel, and principal scientist at Xerox PARC...
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