Algorithm 1: WuPt transmission

1: procedure waking up nodes using multicast WuPt (SINK, FN, REL, DST) 2:    if Sink requests data from DST then 3:        SINK checks cluster table for addressing responsible FN sending REQ to FN 4:        if FN receives REQ then 5:           check cluster member table 6:           if DST is in direct range then 7:               send unicast WuPt 8:           else send multicast WuPt for DST and REL