158 Time-Triggered Communication
synchronized to equivalent points in their respective tables and mechanisms are pro-
vided to quickly attain synchronization if it is ever lost. The tables also contain the
local address (in the IMM) of the data to be transmitted or received. The commands
in each BIU’s Table are organized into multiple frames. Each frame controls a repet-
itive sequence of windows, and each frame has a fixed total period.
According to a schedule stored in its Table Memory, each BIU checks its In-
termodule Memory for the buffer assigned to the next time window. If that buffer’s
BCW says the buffer is ready for transmission, the BIU begins pre-fetching the mes-
sage from the Intermodule Memory. An LRM broadcasts its messages on the