I want to find the position of slave device with respect to master device by using bluetooth? consider a scenario in which on master device called laptop having bluetooth and another slave device cell phone also having bluetooth facility. I want to find the distance between these two devices along with the direction of slave with respect to the master i.e. laptop.can is it possible?
My dear @Shrikant, the following US patent Hybrid bluetooth/RFID based real time location tracking US 6717516 B2 may be the solution to your need!
http://www.google.com/patents/US6717516
Hi Kumbhar,
The distance measurement between BT devices could be based in received signal strength (RSS) or based on time of flight measurement. In fact, as it is proved, that time-based measurements is more accurate than RSS-based because of: strength of wireless signals has non-uniform shadowing when devices are indoors due to having obstacles (NLOS) and signal multipath issue. In other vain, time-based technique needs accurate clock synchronization. Therefore, just for your understanding I want to mention our published paper. Two months ago we published a paper in ION GNSS+ 2014, the paper focused on hybridizing GNSS and BT to locate Smartphone (i.e to measure the distances and then calculate location) when indoors. Please, have a look on this paper.
The link of the paper is: http://www.ion.org/publications/abstract.cfm?jp=p&articleID=12239.
Actually, we have got an idea to measure the distance (pseudo-range) between BT device (smartphone) via hop-time synchronization, i.e. the technique is based on time measurements....
So read the paper if you have any any more question let me know....!