 |
 |
 |
 |
|
 |
 |
SAE J2735-Draft-Rev15 [issued: 01-30-07]
-
32 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
6. DATA FRAMES
DSRC data frames for this volume shall consist of the following data frames. Each data frame shall be further
divided into specific entries and elements as defined in this clause. Typically, these entries are made up of
content internal to this document (made up of entries that are either atomic or complex) and content external to
this document (from other functional areas and companion volumes).
Definitions for these messages are presented in the following subclauses. The ASN is presented in a section
called "ASN.1 Representation," formerly called "Format." In a similar manner, the equivalent XML expression is
presented in a section called "XML Representation" which follows the translation rule set cited in Clause Two.
Regarding equivalent entries to be placed into a data registry. The mapping between data elements and analogous
meta data entries have been explained in other ITS stds. In addition, some meta information is constant in this
entire standard and need not be repeated with each entry here. These include the sponsor and steward of the
entries [SAE], the registration status [registered once the standard is adopted] and the revision date [the date of
the standards adoption]. The class name is always ITS.
The productions of ASN.1 which follow shall be considered normative in nature. While the majority of the normative
content is reflected in the actual syntax of the ASN.1 some entries also have additional statements in the ASN.1
comments which shall be considered to be normative as well. In addition, the commentary provided with each
entry may also provide additional normative restrictions on the proper use of the entry which shall be followed. The
XML productions follow directly from the ASN.1 specifications and the same rules shall be applied.
6.1 Data Frame: DF_AccelerationSet4Way
Use: A set of acceleration values in 3 orthogonal directions of the vehicle and with yaw rotation rate.
ASN.1 Representation:
AccelerationSet4Way ::= SEQUENCE {
long Acceleration, -- Along the Vehicle Longitudinal axis
lat Acceleration, -- Along the Vehicle Lateral axis
vert VerticalAcceleration, -- Along the Vehicle Vertical axis
yaw YawRate
}
XML Representation:
<xs:complexType name="AccelerationSet4Way" >
<xs:sequence>
<xs:element name="long" type="Acceleration" />
<!-- Along the Vehicle Longitudinal axis -->
<xs:element name="lat" type="Acceleration" />
<!-- Along the Vehicle Lateral axis -->
<xs:element name="vert" type="VerticalAcceleration" />
<!-- Along the Vehicle Vertical axis -->
<xs:element name="yaw" type="YawRate" />
</xs:sequence>
</xs:complexType>
Used by: This entry is directly used by the following 3 other data structures in this standard (record type, descriptive name,
ASN.1, and XML name (if present) of each):
DF
DF
MSG
In addition, this item may be used by data structures in other ITS standards.