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SAE J2735-Draft-Rev15 [issued: 01-30-07]
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79 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
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-MsgType ::= INTEGER (0..65535)
Used by: This entry is used directly by one other data structure in this standard, a MSG called MSG_RTCM_Corrections
Remarks: DEBATE NOTE: We might want to make this a long enumerated list of possible message types to
make the XML instances more readable to others. On the other hand, I am not sure all the RTCM message have
formal defined proper names or that they do not conflict between the editions. DCK
7.37 Data Element: DE_RTCM_Payload
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))
Used by: This entry is used directly by one other data structure in this standard, a MSG called MSG_RTCM_Corrections
7.38 Data Element: DE_RTCM_Revision
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),
reserved (1),
rtcmCMR (2),
rtcmCMR-Plus (3),
rtcmSAPOS (4),
rtcmSAPOS-Adv (5),
rtcmRTCA (6),
rtcmRAW (7),
rtcmRINEX (8),
rtcmSP3 (9),
rtcmBINEX (10),
rtcmRev2-x (19), -- Used when specific rev is not known
rtcmRev2-0 (20),
rtcmRev2-1 (21),
rtcmRev2-3 (23), -- Std 10402.3
rtcmRev3-0 (30),
rtcmRev3-1 (31), -- Std 10403.1
... -- # LOCAL_CONTENT
}
-- values to 127 reserved for std use
-- values 128 to 255 reserved for local use
XML Representation:
<xs:annotation>
<xs:appinfo>
unknown (0)
reserved (1)