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SAE J2735-Draft-Rev28 [issued: 11-10-08]
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174 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
7.110 Data Element: DE_RTCM_ID
Use: The RTCM-MsgType provides the 12 bit value defined in the RTCM standards for each message. In
this standard this is rounded to 16 bits (2 bytes) and the upper four bits are defined as zero when one of the
RTCM messages are used. Any bit being set to one in this range would indicate a locally defined (non
national standard) meaning. Note that the RTCM message standard itself defines some private proprietary
message types (in the range 4001 to 4095 in the 12 bit system) and these are also supported. Refer to the
the RTCM for the latest list of these assignments and uses.
ASN.1 Representation:
RTCM-ID ::= INTEGER (0..65535)
XML Representation:
<xs:restriction base="xs:unsignedShort"/>
</xs:simpleType>
Used By: This entry is used directly by one other data structure in this standard, a MSG called
MSG_RTCM_Corrections <ASN> <XML>. In addition, this item may be used by data structures in
other ITS standards.
7.111 Data Element: DE_RTCM_Payload (REMOVE)
Use: The RTCM_Payload element contains the stream so of bytes in the actual RTCM message that is
being sent.
ASN.1 Representation:
RTCM-Payload ::= OCTET STRING (SIZE(1..1023))
XML Representation:
<xs:simpleContent>
<xs:extension base="RTCM-Payload-string" >
<xs:attribute name="EncodingType" use="required">
<xs:simpleType>
<xs:restriction base="xs:NMTOKEN">
<xs:enumeration value="base64Binary"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
<xs:simpleType name="RTCM-Payload-string">
<xs:restriction base="xs:base64Binary">
<xs:minLength value="2"/>
<xs:maxLength value="1364"/>
</xs:restriction>
</xs:simpleType >
Used By: This entry is used directly by one other data structure in this standard, a MSG called
MSG_RTCM_Corrections <ASN> <XML>. In addition, this item may be used by data structures in
other ITS standards.
7.112 Data Element: DE_RTCM_Revision (REMOVE)
Use: The specific revision of the RTCM standard which is being used. This is needed to know precisely
the mapping of the messages types to their definitions, as well as some minor transport layer ordering
details when received in the mobile unit.
ASN.1 Representation:
RTCM-Revision ::= ENUMERATED {
unknown (0),