Algorithm 1 Time-based synchronization for raw-sensory data acquisition.

Require: $buffe{r}_{src}[1,...,n]$: n is the total number of data sources

Ensure: $buffe{r}_{dst}$: queue for time-synchronized data packets

1: procedure Sync($buffe{r}_{dst}$)

2:   $msg\leftarrow create\_msg\left(NULL\right)$

3:  while $i\le No\_of\_datasources$ do

4:    $buffe{r}_{src}\left[i\right]\leftarrow Recv\left(data\right)$        ▹ Complete-sync execution

5:    $msg.add(create\_msg\left(buffe{r}_{src}\left[i\right]\right))$

6:   if $tim{e}_{sec}>time\_window$ then

7:    if $send\_only=TRUE$ then      ▹ Incomplete-sync: Eager execution

8:       $break$

9:    end if

10:    while $j\le No\_of\_datasources$ do    ▹ Incomplete-sync: Rendezvous execution

11:       $j\leftarrow i+1$

12:      if $buffe{r}_{src}\left[j\right].has\_contents$ then

13:         $msg.add(create\_msg\left(buffe{r}_{src}\left[j\right]\right)$

14:      end if

15:     end while

16:     $break$

17:   end if

18:  end while

19:   $msg.timestamp\leftarrow buffe{r}_{src}\left[i\right].timestamp$

20:   $buffe{r}_{dst}.enqueue\left(msg\right)$

21: end procedure