Indoor Navigation using I-Beacon- Accuracy is chan

问题:

I am doing an indoor navigation application using I-Beacon. For that i am using the accuracy given by the beacon. But it is changing rapidly. Since the value is changing, the X and Y coordinates of the user location, which has to be calculated is also varying even when i am static. So please help me to make the accuracy a constant when I m not moving.

Thanks in advance

回答1:

I suggest you to read the following article about the experience with two positioning algorithms Trilateration and NonLinear Regression: R/GA Tech Blog

You will find the complete iOS App that implements both algorithms from these guys on GitHub

The App is very helpful to understand the difficulties of the requirement of the indoor navigation and experiment with it.

Also please note: Apple did announce the indoor positioning on WWDC 2014 with the Core Location Framework in iOS8, but after some couple of month they stopped the program. There were a lot of rush about the new feature. Apple decided than to offer the program only for big companies. You can register for it here.

It is important to understand the Apple strategy: The iBeacons technology is for proximity and advertising in contrast to Core Location Framework indoor positioning features in iOS8. The first one is just an addition to the second one, not replacement.

There is also an interesting article on the Estimote Blog about the physics of beacon tech.. The useful part for you begins with the sentence "When we started building it, we were experimenting with a method called trilateration."

回答2:

Indoor positioning using beacons is extremely hard, precisely due to the fluctuations in the distance (accuracy) estimates. You could try some averaging and smoothing out algorithms, but that's just the beginning to implementing reliable, beacon-based indoor positioning.

Estimote is working on ready-made library for indoor location with beacons: https://github.com/Estimote/iOS-Indoor-SDK, you might want to give it a try. It only works with Estimote beacons though.