Identification of Partitions in a Homogeneous Activity Group Using Mobile Devices

Algorithm 4

Probability-based clustering algorithm.

Input: test set of time series on mobile devices under activity , selected sensing modalities in each set of time series,

   probability threshold

Output: device groups in each group identification time window

(1) Each mobile device uses its local time series to compute the PDFs for each selected sensing modality according to its window

  size;

(2) The server or sink node collects the PDFs from all the mobile devices once in each group identification time window and run

  the following process:

(3) Initialize group affiliation matrix ;

(4) for each device pair   do

(5)  ;

(6)  for    do

(7)   Compute ;

(8)   if    then

(9)    ;

(10)   end if

(11)  end for

(12)  Compute ;

(13)  if    then

(14)   ;

(15)  else

(16)   ;

(17)  end if

(18) end for

(19) Apply DJ-Cluster algorithm on matrix ;