I am working on a project to create an indoor positioning system.

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I need to create an indoor positioning system which should also have navigation. I do not know how to go about it.
I want to use c# to create it, but so far, i can't even find a place that shows me how to calculate the RSSI value. Most articles just have complex formulas with little explanations.

Any help would do, websites i could go on, or anything, because i am running out of time.

What I have tried:

I have read quite a number of articles, checked online, but i keep running into dead ends. I have seen that you can use C++, but yet no clear solution on how. And also 1 or 2 articles have spoken about using MATHLAB, and I have no idea on how to use it

Posted 11-Dec-17 23:10pm

Stephen Dauda

Updated 11-Dec-17 23:42pm

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Richard MacCutchan 12-Dec-17 5:40am

What does "indoor positioning system" actually mean? And when you say you are running out of time, do you mean that this is a college project or similar?

Stephen Dauda 12-Dec-17 9:06am

An Indoor Positioning System is basically a technology that tracks the position of devices indoors (within a building). The well known GPS is incapable of doing this accurately due to the signals not being able to pass through walls. So the indoor positioning system does the tracking indoors, with the use of certain methods and hardware devices as its satellites, so to say. It can be used for various purposes like, in hospitals to locate doctors or patients, can also be used in large buildings like stadiums, shopping malls, museums, and so on, to guide people round and aid them find places easier and faster, it can also be used in advertising too. It is an interesting technology that is gaining ground in the world of today.

And yes it is a college project

Richard MacCutchan 12-Dec-17 11:31am

Sounds rather ambitious.

Stephen Dauda 12-Dec-17 14:28pm

yeah, it kinda is. But a good area to focus in. Not too many people currently crowding it, so you could end up making something good

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Jochen Arndt · Accepted Answer · 2017-12-11T23:42:00

Solution 1

That requires some kind of specific hardware to track the position (Indoor positioning system - Wikipedia[^]).

So you have to

Select the positioning method (sensor types)
Select sensors according to the requirements like accuracy, comparison of sensors from multiple vendors, and SDK support for the programming language to be used
Get the sensors and implement the communication using the sensor SDKs
Implement the positioning algorithm(s) using the sensor data
Implement the navigation
Put it all together (GUI)

Posted 11-Dec-17 23:42pm

Jochen Arndt

Comments

Stephen Dauda 12-Dec-17 9:00am

Thank you for the steps, makes the whole thing much clearer. I plan on using Wi-Fi access points. So i am going to use RSSI data and also use the fingerprinting method. But i am stuck on getting the RSSI values.
Also what do you mean by sensors?
And i also plan on using Xamarin SDK (C# programming language).

Jochen Arndt 12-Dec-17 9:29am

If you use access points, those and your WiFi device are your "sensors" and the RSSI values are the sensor data.

How to get the RSSI values depends on the device. You have to read the documentation of your APs and/or your device to know how to read the RSSI values.

But note that RSSI values will probably not provide accurate positions. That applies especially if there are moving objects like people between AP and device.

Stephen Dauda 12-Dec-17 10:05am

So there is no general formula or method for getting RSSI values between APs and Android OS mobile devices??
Because I have no knowledge on the APs used in the building that I plan to implement the system in

Jochen Arndt 12-Dec-17 10:34am

At first you have to decide which RSSI values should be used: From the AP the client device or both. That depends mainly on which device your application is running. To use both sides, you need additional communication.

I assume that the application should run on the client device. Then the RSSI is usually provided by the driver of the WiFi interface. But a better method would be using an operating system API. As a first step you might look for applications that show available APs because those show usually also the signal strength.

Stephen Dauda 12-Dec-17 11:34am

Ok, do you know any APIs that i could check out or applications you can recommend that will show the signal strength so that I can extract the values?

Jochen Arndt 12-Dec-17 11:45am

For Windows just search the web for something like "c# wifi scanner".

Stephen Dauda 12-Dec-17 14:14pm

Thank you very much. This is a really good start, will work on it from here and see how far i can go, will get back to you soon on my progress. Thanks for the help