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SAE J2735-Draft-Rev28 [issued: 11-10-08]
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152 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
loc qual bt5m (1) -- quality better than 5 meters
loc qual bt12m (2) -- quality better than 12.5 meters
loc qual bt50m (3) -- quality better than 50 meters
loc qual bt125m (4) -- quality better than 125 meters
loc qual bt500m (5) -- quality better than 500 meters
loc qual bt1250m (6) -- quality better than 1250 meters
loc qual unknown (7) -- quality value unknown
</xs:appinfo>
<xs:documentation>
3 bits, appends with loc-tech to make one octet (0..7)
</xs:documentation>
</xs:annotation>
<xs:union>
<xs:simpleType>
<xs:restriction base="xs:unsignedInt">
<xs:minInclusive value="0"/>
<xs:maxInclusive value="7"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="loc qual bt1m"/>
<xs:enumeration value="loc qual bt5m"/>
<xs:enumeration value="loc qual bt12m"/>
<xs:enumeration value="loc qual bt50m"/>
<xs:enumeration value="loc qual bt125m"/>
<xs:enumeration value="loc qual bt500m"/>
<xs:enumeration value="loc qual bt1250m"/>
<xs:enumeration value="loc qual unknown"/>
</xs:restriction>
</xs:simpleType >
</xs:union>
</xs:simpleType>
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.
7.84 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