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SAE J2735-Draft-Rev28 [issued: 11-10-08]
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155 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
zero (it is 0x30), framing errors due to incorrectly clocking initial zero values can not occur. Note that the
MSB byte is always transmitted first, following the typical ASN bytes order. When a well formed DSRC
message (including its last two bytes holding the CRC value) is decoded and input to the CRC process, the
resulting CRC should always be the value zero.
ASN.1 Representation:
MsgCRC ::= OCTET STRING (SIZE(2)) -- created with the CRC-CCCITT polynomial
XML Representation:
<xs:complexType name="MsgCRC" >
<xs:simpleContent>
<xs:annotation>
<xs:documentation>
created with the CRC-CCCITT polynomial
</xs:documentation>
</xs:annotation>
<xs:extension base="MsgCRC-string" >
<xs:attribute name="EncodingType" use="required">
<xs:simpleType>
<xs:restriction base="xs:NMTOKEN">
<xs:enumeration value="base64Binary"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
<xs:simpleType name="MsgCRC-string">
<xs:restriction base="xs:base64Binary">
<xs:length value="3"/>
</xs:restriction>
</xs:simpleType >
Used By: This entry is directly used by the following 4 other data structures in this standard (record type,
descriptive name, ASN.1, and XML name (if present) of each):
MSG
<XML>, and
MSG
<XML>, and
MSG
<XML>, and
DF
In addition, this item may be used by data structures in other ITS standards.
7.89 Data Element: DE_MultiVehicleReponse
Use: A data element which is set if the vehicle transmitting believes that more than one vehicle (regardless
of the dispatch or command and control organization of those vehicles or their agency) are currently in-
route or involved in the response to the event. When received in a message by another vehicle OBU, this
data element indicates to other vehicles that addition response vehicles may be converging to the same
location and that addition caution is warranted.
Used to indicate that more that one vehicle is responding and traveling in a closely aligned fashion (one
after the other in a loose platoon formation). This DE is intended to be used with the DSRC public safety
vehicle operating in the area use case.
ASN.1 Representation:
MultiVehicleReponse ::= ENUMERATED {
notEquipped (0),
singleVehicle (1),
multiVehicle (2),
reserved (3) -- for future use
}