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SAE J2735-Draft-Rev29 [issued: 12-11-08]
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270 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
… etc
...
New
snapshots
time
#
1
#
2
#
3
#
4
#
5
#
14
#
15
… etc
...
Deleted
snapshots
Figure 15 Snapshot Deletion Process
The figure below illustrates the one implementation of the snapshot writing process.
Buffer Full with Event
snapshots
?
Buffer Full of Events
and Start
/
Stop
snapshots
?
Buffer Full
?
Start
(
New
snapshot to be
added to buffer
)
Record snapshot
New snapshot is Event
?
End (
Do Not
record snapshot
)
Delete
oldest event
snapshot.
Record new
event
snapshot.
End
New snapshot is Event
or Start/
Stop snapshot
?
Delete oldest start/
stop snapshot.
Record new start
/
stop snapshot
End (
Do Not
record snapshot
)
End
End
Delete according
to periodic
snapshot deletion
scheme
–
see text
End
Y
Y
Y
Y
N
N
Y
N
N
N
Figure 16 Snapshot Writing Procedure