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SAE J2735-Draft-Rev15 [issued: 01-30-07]
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93 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
7.51 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
MSG
In addition, this item may be used by data structures in other ITS standards.
7.52 Data Element: DE_ThrottleConfidence
Use: This DE is used to provide to listeners the confidence interval of the 95% confidence level for the currently
reported value of DE_Throttle, taking into account the current calibration and precision of the sensor(s) used to
measure and/or calculate the value. This data element is only to provide the listener with information on the
limitations of the sensing system; not to support any type of automatic error correction or to imply a guaranteed
maximum error. This data element should not be used for fault detection or diagnosis, but if a vehicle is able to
detect a fault, the confidence interval should be increased accordingly.
ASN.1 Representation:
ThrottleConfidence ::= ENUMERATED {
notEquipped (0), -- B'00 Not Equipped
prec10percent (1), -- B'01 10 percent
prec1percent (2), -- B'10 1 percent
prec0-5percent (3) -- B'11 0.5 percent
}