To, że dane o ruchu abonentów GSM mogą być i są wykorzystywane do wsparcia procesów zarządzania ruchem i planowania tras, jest faktem chyba bezspornym. Takie rozwiązania funkcjonują w rzeczywistości.
Dla przykładu:
"Monitoring by FCD-GSM
The movement of people who have a GSM handset can be tracked by monitoring the signalling between GSM handsets and GSM base stations. The signalling data contains information on the location of the handset in GSM cells with known location and configuration and the handover moment of handsets to new cells if the handset user is moving. By smart filtering of the large volumes of data, ARS T&TT is able to extract the movement of handset users in vehicles. The vehicle position data is then map matched to the road network and in combination with the timing data will result in traffic flow and travel time measurements. Though individual FCD-GSM measurements are not accurate, the large volume of data allows statistical processing and yields valuable traffic information, provided that proper filtering has been applied. This method is best applicable for semi-static configurations in regional or national road networks."
(FCD: Floating Car Data -
przypisek mój)
http://www.ars.nl/china/traff_monitor.htm"The company explains that MTS is based on data drawn anonymously from the GSM network. Smart use of the GSM network provides insight into the movement of mobile telephones on the entire road network, and passive monitoring of the mobile network provides anonymous information without involving individual mobile telephones. The monitored data is processed by the software and servers in the Dutch Vodafone GSM network. MTS solution uses software from Applied Generics and ERTICO Partner PTV."
(MTS: Mobile Traffic Services -
przypisek mój)
http://www.ertico.com/en/news_and_events/ertico_newsroom/logicacmgs_mobile_traffic_services_to_serve_south_holland.htm"Location data could be collected using our patented ( US patent 6,577,946 ) method of obtaining and continuously updating real-time mobile location information, the information used as an input for the traffic jam guidance application. Position information records of vehicle based phone coordinates, timing, etc, are collected from the cellular networks, updated and stored in a database. Those records together with digital maps are fed into mathematical models and algorithms to construct lists of vehicles traveling on various road sections, traffic loads at particular road sections, real time travel times along all road sections resulting from traffic congestion in particular areas, turning loads for signal intersections, for proper functioning of Real-Time Traffic Jam guidance application. The system is equally compatible with the GSM, CDMA or any other mobile phone systems, since it does not depend on system specific features. The data from moving vehicles is collected and fed into the system continuously. The system filters and cleans the data by applying intelligent heuristic algorithms and produces information on traffic situations in real time that can be supplied to automated traffic controllers. This eliminates the need for developing a dedicated mobile wireless information gathering fleet or other high cost devices requiring a large amount of personnel and long reaction times for traffic events such as accidents and traffic congestion."
http://www.live-traffic.com/ProductsAndTechnology.cfmTo tylko kilka przykładów z wielu.
Jaka jest praktyczna przydatność i powszechność tego rodzaju rozwiązań? - nie mam pojęcia. Jaka jest precyzja tych danych? Nie wiem. Nie mam wiedzy ani o technicznych detalach i możliwościach sieci GSM, ani nawet o naturze tej technologii.
W swoich zbiorach mam taki artykuł (plik PDF), co do którego ciekaw jestem komentarza ludzi związanych z branżą:
Deriving origin destination data from a GSM network
http://www.esi2.us.es/GT/wideberg/DERIVING%20TRAFFIC%20DATA%20FROM%20A%20CELLULAR%20NETWORK.pdfMnie, jako laikowi, wydał się ciekawy i obiecujący we wnioskach.
Cieszę się, że dyskusja się rozwija. Wszyscy pewnie dowiemy się czegoś interesującego.
Choć odpowiedź na pytanie "kiedy?" nie pada. Trudno, proponuję jednak brnąć dalej w offtopic...
