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SAE J2735-Draft-Rev26 [issued: 09-18-08]
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96 -
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 DF called
DF_SpaceVector <ASN> <XML>. In addition, this item may be used by data structures in other ITS
standards.
Remarks: This element was originally defined in J2313. From Section 8.35 "Location-Quality." This
element is used by the IEEE IM effort relating to the accuracy of location information.
7.4 Data Element: DE_MAYDAY_Location_tech_code
Use: The technology used to determine the position of the vehicle. This element is used to convey what
type of technology was used to determine the position (other elements it is used with in messages). The
nav-system flag in the sender flag word shall be set to reflect the device technologies available.
ASN.1 Representation:
Location-tech ::= ENUMERATED {
loc-tech-unknown (0), -- technology type unknown
loc-tech-GPS (1), -- GPS technology only
loc-tech-DGPS (2), -- differential GPS (DGPS) technology
loc-tech-drGPS (3), -- dead reckoning system w/GPS
loc-tech-drDGPS (4), -- dead reckoning system w/DGPS
loc-tech-dr (5), -- dead reckoning only
loc-tech-nav (6), -- autonomous navigation system on-board
...,
loc-tech-fault (31) -- feature is not working
} -- (0..31) 5 bits, appends with loc-quality to make one octet
XML Representation:
<xs:annotation>
<xs:appinfo>
loc tech unknown (0) -- technology type unknown
loc tech GPS (1) -- GPS technology only
loc tech DGPS (2) -- differential GPS (DGPS) technology
loc tech drGPS (3) -- dead reckoning system w/GPS
loc tech drDGPS (4) -- dead reckoning system w/DGPS
loc tech dr (5) -- dead reckoning only
loc tech nav (6) -- autonomous navigation system on-board
loc tech fault (31) -- feature is not working
</xs:appinfo>
<xs:documentation>
(0..31) 5 bits, appends with loc-quality to make one octet
</xs:documentation>
</xs:annotation>
<xs:union>
<xs:simpleType>
<xs:restriction base="xs:unsignedInt">
<xs:minInclusive value="0"/>
<xs:maxInclusive value="31"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="loc tech unknown"/>
<xs:enumeration value="loc tech GPS"/>
<xs:enumeration value="loc tech DGPS"/>
<xs:enumeration value="loc tech drGPS"/>
<xs:enumeration value="loc tech drDGPS"/>
<xs:enumeration value="loc tech dr"/>
<xs:enumeration value="loc tech nav"/>
<xs:enumeration value="loc tech fault"/>
</xs:restriction>
</xs:simpleType >
</xs:union>
</xs:simpleType>
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