An event driven federate must merge events from other federates with local events so all events are processed in time stamp order
RTI delivers events to each federate in time stamp order (TSO)
RTI
federate
local
events
logical
time
current
time
next
local
event
remote
event?
Tlocal
federate must determine whether or not it can process its next local event
requires knowledge of the time stamp of events arriving in the future
LBTS
The RTI computes a quantity called LBTS that defines a lower bound on the time stamp of events that could be delivered to the federate in the future; local events with time stamp < LBTS can be “safely” processed