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SAE J2735-Draft-Rev29 [issued: 12-11-08]
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263 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
A (Provider Service Context (PSC) which is a field associated with a PSID containing
supplementary information related to the service
The simplified structure of a probe message and snapshots is illustrated below.
Header
Snapshot1
Snapshot2
Snapshot3
Snapshot4
Lat
Long
Time
PSID
PSC
Lat
Long
Time
Temp ID
Wipers
Brakes
…
Probe message standard Header
Probe message
Snapshot
Vehicle Data Elements
Snapshot Header
Figure 11 Probe Message and Snapshots
The current allowed vehicle data elements that are included in the probe snapshot are listed below. For
description, ranges, formats and units see the definition provided in Sections 7 and 8 earlier in the
standard. The message structure allows additional data elements as technology changes in vehicles and as
the standard is revised.
Data Concept
Formal Name
1.
Acceleration
2.
Acceleration Confidence
3.
Ambient Air Pressure
4.
Ambient Air Temperature
5.
Antilock Brake Status
6.
Brake Applied Pressure
7.
Brake Applied Status
8.
Brake Boost Applied
9.
Coefficient Of Friction
10.
Date
11.
Driving Wheel Angle
12.
Elevation
13.
Exterior Lights
14.
Heading
15.
Heading Confidence
16.
Latitude
17.
Longitude
18.
Obstacle Direction
19.
Obstacle Distance