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SAE J2735-Draft-Rev29 [issued: 12-11-08]
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185 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
7.126 Data Element: DE_TemporaryID
Use: This is the 6 byte random MAC/IP address, called the temporary ID, since the MAC address is
randomly generated at various times according to a timer, or vehicle start-up, or possibly other events. In
essence, the MAC value for a mobile OBU device (unlike a typical wireless or wired 802 device) will
periodically change to ensure the overall anonymity of the vehicle. Because this value is used as a means
to identify the local vehicles that are interacting during an encounter, it is used in the message set.
ASN.1 Representation:
TemporaryID ::= OCTET STRING (SIZE(4)) -- a 4 byte string array
XML Representation:
<xs:complexType name="TemporaryID" >
<xs:simpleContent>
<xs:annotation>
<xs:documentation>
a 4 byte string array
</xs:documentation>
</xs:annotation>
<xs:extension base="TemporaryID-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="TemporaryID-string">
<xs:restriction base="xs:base64Binary">
<xs:length value="6"/>
</xs:restriction>
</xs:simpleType >
Used By: This entry is directly used by the following 5 other data structures in this standard (record type,
descriptive name, ASN.1, and XML name (if present) of each):
DF
<XML>, and
MSG
<XML>, and
MSG
<XML>, and
MSG
<XML>, and
DF
In addition, this item may be used by data structures in other ITS standards.
Remarks: Note: Edited to become 4 bytes (from 6) by recent VSC-A proposal. Need to determine if this
really is treated as a "mac" and reword the description when this is decided.
7.127 Data Element: DE_TerminationDistance
Use: Provides a Distance-to-Live type of time-out. Allows users to provide the distance driven until the
probe management process ceases and the default condition is applied.
ASN.1 Representation:
TermDistance ::= INTEGER (1..30000) -- units in meters
XML Representation:
<xs:simpleType name="TermDistance" >
<xs:annotation>
<xs:documentation>