Study of Activity Tracking through Bluetooth Low Energy-Based Network

Algorithm 1

Proposed Localization Technique.

Input: corresponding to ( corresponds to number of RSS values recorded by )

Output: position of beacon at event k

(1) The RSSI value of beacon packet is sorted into set

(2) If of sets corresponding to any devices reach MAX_NUM, Go to step 8 for next .

  Else, go to step 1

(3) 

(4) 

(5) 

(6) If Diff_Time<Thresh_Time, then

  Else, = position of closest point of cluster of the FS with

(7) If , then continue to step 13. Else, and go to step 14

(8) Pass initial position estimate , estimated distances and known positions of the corresponding

  to L-BFGS optimizer the position of beacon is calculated

(9) If , then

  .

(10) of beacon is localized on the map.