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SAE J2735-Draft-Rev18 [issued: 06-26-07]
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124 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
In addition, this item may be used by data structures in other ITS standards.
Remarks: It is recommended that Automotive Manufacturers divide the range of their Sun Sensors into 8
resistance ranges corresponding to the above scale. For Example: a sensor that has a resistance range from
12K Ohms (No Light) to 250 Ohms (Max Light) will have the following resistance value ranges:
# 0= 10501 to 12000 Ohms
# 1=9250 to 10749 Ohms
# 2=7750 to 9249 Ohms
# 3=6250 to 7749 Ohms
# 4=4750 to 6249 Ohms
# 5=3250 to 4749 Ohms
# 6=1750 to 3249 Ohms
# 7=250 to 1749 Ohms
7.82 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(6)) -- a 6 byte string array
XML Representation:
<xs:complexType name="TemporaryID" >
<xs:simpleContent>
<xs:annotation>
<xs:documentation>
a 6 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="8"/>
</xs:restriction>
</xs:simpleType >
Used by: This entry is directly used by the following 2 other data structures in this standard (record type,
descriptive name, ASN.1, and XML name (if present) of each):
DF
<XML>, and
MSG
In addition, this item may be used by data structures in other ITS standards.