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SAE J2735-Draft-Rev15 [issued: 01-30-07]
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29 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
Remarks: Need to sync this up with a similar message already present in the IEEE 1512 work so they match.
5.8 Message: MSG_ProbeVehicleData
Use: The probe vehicle message frame is defined below. The probe vehicle message is used to exchange status
about a vehicle with other (typically RSU) DSRC readers to allow the collection of information about typically
vehicle traveling behaviors along a segment of road. The exchanges of this message as well as the event which
caused the collection of various elements defined in the messages are defined in Annex B of this standard. In
typical use the reporting vehicle has collected one or more snapshots which it will send to a receiving RSU along
with information (the vector) about the point in time and space when the snapshot event occurred. Because any
sequence of snapshots are related within a limit range of time and space, some data compression may be used in
the message to reduce redundant information.
ASN.1 Representation:
ProbeVehicleData ::= SEQUENCE {
msgID DSRCmsgID, -- App ID value, 1 byte
startVector FullPositionVector, -- the space and time of
-- transmission to the RSU
vehicleType VehicleType, -- type of vehicle, 1 byte
cntSnapshoots INTEGER (1..32), -- a count of how many snaphots
-- type entires will follow
snapshots SEQUENCE (SIZE(1..32)) OF Snapshot,
-- a seq of name-value pairs
-- along with the space and time
-- of the first measurement set
... -- # LOCAL_CONTENT
} -- Est size about 64 bytes plus snapshot sizes (about 12 per)
XML Representation:
<xs:element name="probeVehicleData" type="ProbeVehicleData"/>
<xs:complexType name="ProbeVehicleData" >
<xs:annotation>
<xs:documentation>
Est size about 64 bytes plus snapshot sizes (about 12 per)
</xs:documentation>
</xs:annotation>
<xs:sequence>
<xs:element name="msgID" type="DSRCmsgID" />
<!-- App ID value, 1 byte -->
<xs:element name="startVector" type="FullPositionVector" />
<!-- the space and time of
transmission to the RSU -->
<xs:element name="vehicleType" type="VehicleType" />
<!-- type of vehicle, 1 byte -->
<xs:element name="cntSnapshoots" >
<xs:simpleType>
<xs:restriction base="xs:unsignedByte">
<xs:minInclusive value="1"/>
<xs:maxInclusive value="32"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<!-- a count of how many snaphots
type entires will follow -->
<xs:element name="snapshots" >
<xs:complexType>
<xs:sequence minOccurs="1" maxOccurs="32">
<xs:element name="snapshot" type="Snapshot" />
<!-- a seq of name-value pairs along with the space and time of the first
measurement set -->