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SAE J2735-Draft-Rev26 [issued: 09-18-08]
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155 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
guidelines of NTCIP 1211 (Object Definitions for Signal Control and Prioritization (SCP)) except that the
range is extended to be 0..15 for each.
NTCIP Clause 3.1.1.1.4 defines Priority Request Vehicle Class Type as follows: This object is the 'PRG
requested' class type (relative priority of a request). The order of precedence is by class type with 1 highest
and 10 (15 for this system) lowest. A request with a higher class type will override a lower class type.
NTCIP Clause 3.1.1.1.5 defines Priority Request Vehicle Class Level as follows: This object is the 'PRG
requested' class level (relative priority of a request within each class of request). The order of precedence
is by class type and then class level.
1 is highest and 10 (15 for this system) lowest. A request with a higher class level does NOT override a
lower class level.
Note that the value zero is not in fact defined in the NTCIP system.
ASN.1 Representation:
NTCIPVehicleclass ::= OCTET STRING (SIZE(1))
-- With bits set as per NTCIP values
-- Priority Request Vehicle Class Type
-- in the upper nibble
-- Priority Request Vehicle Class Level
-- in the lower nibble
XML Representation:
<xs:complexType name="NTCIPVehicleclass" >
<xs:simpleContent>
<xs:annotation>
<xs:documentation>
With bits set as per NTCIP values
Priority Request Vehicle Class Type
in the upper nibble
Priority Request Vehicle Class Level
in the lower nibble
</xs:documentation>
</xs:annotation>
<xs:extension base="NTCIPVehicleclass-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="NTCIPVehicleclass-string">
<xs:restriction base="xs:base64Binary">
<xs:length value="2"/>
</xs:restriction>
</xs:simpleType >
Used By: This entry is used directly by one other data structure in this standard, a DF called
DF_SignalRequest <ASN> <XML>. In addition, this item may be used by data structures in other ITS
standards.
Remarks: Note that the integer value range of 1..10 has been extended to become 0..15 in a one byte octet
in the DSRC use of this item.
7.97 Data Element: DE_ObstacleDirection
Use: As a companion data element to Obstacle Distance, this data element draws from the output of a
forward sensing system to report the obstacle direction from the vehicle detecting and reporting the
obstacle. The data is expressed in degrees as azimuth relative to forward direction of vehicle.
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