This blog is intended to extend the LBS topic discussed in class.
The technologies behind LBS are progressing steadily. There are a few variants with one goal, that being to be able to locate a user with pin point accuracy.
The technologies can reside in the telecommunication networks or the mobile handsets or in some cases both. For instance, lets discuss A-GPS, also referred to as Assisted GPS.In this case the handset exchanges messages with the cellular towers to compute the location of a user. This technology is fairly inexpensive in comparison to a network only technology. A network only technology, such as U-TDOA piggy backs on existing cellular networks to listen to the user call signals to compute the location.
The latest in this world of LB technology is to utilize ignals from TV towers to location users. TV towers are very prevalent and if used in tandem with cellular towers can compute very accurate locations. Calculating the latitude and longitude has been mastered. The next frontier is to be able to compute the Z-axis, which is altitude.
The technologies behind LBS are progressing steadily. There are a few variants with one goal, that being to be able to locate a user with pin point accuracy.
The technologies can reside in the telecommunication networks or the mobile handsets or in some cases both. For instance, lets discuss A-GPS, also referred to as Assisted GPS.In this case the handset exchanges messages with the cellular towers to compute the location of a user. This technology is fairly inexpensive in comparison to a network only technology. A network only technology, such as U-TDOA piggy backs on existing cellular networks to listen to the user call signals to compute the location.
The latest in this world of LB technology is to utilize ignals from TV towers to location users. TV towers are very prevalent and if used in tandem with cellular towers can compute very accurate locations. Calculating the latitude and longitude has been mastered. The next frontier is to be able to compute the Z-axis, which is altitude.
No comments:
Post a Comment