Figure 6
From: Wireless home automation networks for indoor surveillance: technologies and experiments
Device synchronization and timing error analysis. Top panel: device synchronization assuming two cases: wake-up before beacon reception (case 1) and wake-up after beacon reception (case 2). Case 2 requires re-synchronization using the subsequent beacon transmission. Bottom panel: probability density function of the time between the ED wake-up and the reception of beacon message (the average value of 50 ms equals to selected guard time Tg, maximum jitter is 4 ms).