(a) LETED results. Nodes consume the same amount of energy with tx frequency 1 hour and 12 hours, since they send SYNC frame every 5 minutes in these cases
(b) B-MAC: as nodes send a long preamble in front of every data frame, they consume a huge amount of energy with high data rates (1 frame a minute)
Figure 33: Energy of data transmission and reception for various data rates (a frame sent every 1 minute, 1 hour, and 12 hours) when supporting 5-second end-to-end delays.