 |
 |
 |
 |
|
 |
 |
SAE J2735-Draft-Rev26 [issued: 09-18-08]
-
46 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
6.4 Data Frame: DF_Application Context Mark (REMOVE)
Use: The Application Context Mark (ACM) provides a unique means of identifying each element of each
specific application. A priority is assigned to each ACM, allowing a single application to utilize different
priorities for different elements.
ASN.1 Representation:
AppContextMark ::= SEQUENCE {
said INTEGER(0..4294967295),
-- SpecificApplicationIdentification, the SAID
context INTEGER(0..255),
-- Context, see appropriate Appendix
priority INTEGER(0..7),
-- Priority, in accordance with IEEE P1609
...
}
XML Representation:
<xs:complexType name="AppContextMark" >
<xs:sequence>
<xs:element name="said" >
<xs:simpleType>
<xs:restriction base="xs:unsignedInt"/>
</xs:simpleType>
</xs:element>
<!-- SpecificApplicationIdentification, the SAID -->
<xs:element name="context" >
<xs:simpleType>
<xs:restriction base="xs:unsignedByte"/>
</xs:simpleType>
</xs:element>
<!-- Context, see appropriate Appendix -->
<xs:element name="priority" >
<xs:simpleType>
<xs:restriction base="xs:unsignedByte">
<xs:maxInclusive value="7"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<!-- Priority, in accordance with IEEE P1609 -->
</xs:sequence>
</xs:complexType>
In addition, this item may be used by data structures in other ITS standards.
6.5 Data Frame: DF_Approach
Use: The Approach data structure is used to bundle related motor vehicle lanes (both reference lanes and
computed lanes are described) within the intersection for an Approach or Egress description which is part
of an intersection. It also allows expressing information about any barriers found between lanes
(medians), other types of lanes (such as a train crossings), and information about pedestrian and bicycle
lanes or walkways, all of which may cross the described motor vehicle lanes (at arbitrary angles).
ASN.1 Representation:
Approach ::= SEQUENCE {
name DescriptiveName OPTIONAL,
id ApproachNumber,
drivingLanes SEQUENCE (SIZE(1..32)) OF
computedLanes SEQUENCE (SIZE(0..32)) OF
VehicleComputedLane OPTIONAL,
trainsAndBuses SEQUENCE (SIZE(0..32)) OF
SpecialLane OPTIONAL,
barriers SEQUENCE (SIZE(0..32)) OF
BarrierLane OPTIONAL,
crosswalks SEQUENCE (SIZE(0..32)) OF
 |