
136 Time-Triggered Communication
With respect to startup, FlexRay differentiates between two types of nodes, cold-
start nodes and non-coldstart nodes [274]. The coldstart nodes may actively partici-
pate in the startup process while non-coldstart nodes may integrate themselves only
in a running cluster (i.e., after there are at least two synchronized coldstart nodes). A
leading coldstart node is the first node that sends a startup frame during the startup
process.
S S S S S
S S S S S
Cycle 0 Cycle 1 Cycle 2 Cycle 3 Cycle 4 .....
Leading
Coldstarter
Channel
Following
Coldstarter
CAS
S
S
Clock Start
Node 1
Clock Start
Node 2
listening time
FIGURE 6.11
FlexRay Startup ...