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SAE J2735-Draft-Rev18 [issued: 06-26-07]
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This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
Used by: This entry is used directly by one other data structure in this standard, a MSG called
MSG_SPAT (SIGNAL PHASE AND TIMING MESSAGE) <ASN> <XML>. In addition, this item
may be used by data structures in other ITS standards.
6.19 Data Element: DF_NodeConfig
Use: A data structure which provides further details on how the offset are applied to the reference point in
map fragments. This structure controls a "zoom" setting allowing the offset range to be extended as a price
in resolution. How vertical offset information is to be treated is also handled here (TBD).
ASN.1 Representation:
NodeConfig ::= INTEGER (0..65535) -- This will prob be a bitstring
-- of some sort with named bits when
-- we are done
XML Representation:
<xs:simpleType name="NodeConfig" >
<xs:annotation>
<xs:documentation>
This will prob be a bitstring
of some sort with named bits when
we are done
</xs:documentation>
</xs:annotation>
<xs:restriction base="xs:unsignedShort"/>
</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
DF
In addition, this item may be used by data structures in other ITS standards.
Remarks: The original proposal suggested a zoom that did not provide 2x powers of growth. Such a zoom
scale is useful to keep all data items aligned on the same grid and never have round-off errors in translation.
6.20 Data Frame: DF_NodeList
Use: The NodeList data structure provides the sequence of signed offset values for determining the Xs and
Ys (and, possibly Zs when present) using the then current ReferencePoint and NodeConfih objects to build
a path for the enclosing ReferenceLane relating to a lane in the current intersection.
ASN.1 Representation:
NodeList ::= SEQUENCE (SIZE(1..64)) OF Offsets
-- RefPointID was removed because in practice,
-- you do not seem to need it and sending another ref point
XML Representation:
<xs:complexType name="NodeList" >
<xs:sequence minOccurs="1" maxOccurs="64">
<xs:element name="node" type="Offsets" />
</xs:sequence>
</xs:complexType>
Used by: This entry is used directly by one other data structure in this standard, a DF called
DF_ReferenceLane <ASN> <XML>. In addition, this item may be used by data structures in other
ITS standards.
Remarks: The first node is the one closest to the intersection for the lane. Typically, this is located on the