One of the problems associated with the use of the GPS reception in our mobile devices is the fact of batteries of them consume significantly more quickly. That is coupled with the difficulty of receiving the signal in locations surrounded by tall buildings or tunnels.
A team from the Illinois Institute of Technology in Chicago have developed a program called SmartLoc which among other things improves the accuracy of the GPS system and also save on battery due to the use of the smartphones inertia sensors.
Although this sensor you need a GPS signal of departure, thereafter You can measure the acceleration indicating for example that we move forward or we turn left and right.
These data are combined with of the maps which shows where are the crosses, turns, and even traffic lights. Each map element has a “signature of inertia” feature the smartphone can be identified, making that system also serves to show our position at all times.
With a Galaxy S3 tests showed that the system works, and even in the streets of downtown Chicago where the signal is lost at various points the program retrieves the data. “Our extensive tests show that SmartLoc improves the accuracy of the location less than 20 m to more than 90% of the streets in downtown Chicago, compared with more than 50% using only GPS data,” explained one of the responsible for the project.
The idea is also interesting because this type of development could make that GPS could disable periodically so that the sensor of inertia of these smartphones only used, much more efficient at the level of battery consumption.