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SAE J2735-Draft-Rev15 [issued: 01-30-07]
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This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
occur in an interoperable way. When a device receives a request for a data element it does not understand or
support, then that request is simply ignored.
ASN.1 Representation:
CommonSafetyRequest ::= SEQUENCE {
request2Cnt INTEGER (0..32), -- 1 byte
requests2 SEQUENCE (SIZE(0..32)) OF StdTagList,
-- Part II items
request3Cnt INTEGER (0..32), -- 1 byte
requests3 SEQUENCE (SIZE(0..32)) OF TwoByteTagList,
-- Part III items
... -- # LOCAL_CONTENT
}
XML Representation:
<xs:element name="commonSafetyRequest" type="CommonSafetyRequest"/>
<xs:complexType name="CommonSafetyRequest" >
<xs:sequence>
<xs:element name="msgID" type="DSRCmsgID" />
<!-- App ID value, 1 byte -->
<xs:element name="request2Cnt" >
<xs:simpleType>
<xs:restriction base="xs:unsignedByte">
<xs:maxInclusive value="32"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<!-- 1 byte -->
<xs:element name="requests2" >
<xs:complexType>
<xs:sequence minOccurs="0" maxOccurs="32">
<xs:element name="requests2-item" type="StdTagList" />
<!-- Part II items -->
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="request3Cnt" >
<xs:simpleType>
<xs:restriction base="xs:unsignedByte">
<xs:maxInclusive value="32"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<!-- 1 byte -->
<xs:element name="requests3" >
<xs:complexType>
<xs:sequence minOccurs="0" maxOccurs="32">
<xs:element name="requests3-item" type="TwoByteTagList" />
<!-- Part III items -->
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="localCommonSafetyRequest" type="local:CommonSafetyRequest"
minOccurs="0"/>
</xs:sequence>
</xs:complexType>
5.4 Message: MSG_EmergencyVehicleAlert
Use: The Emergency Vehicle Alert message is used to broadcast warning messages to surrounding vehicles that
an emergency vehicle (typically an incident responder of some type) is operating in the vicinity and that additional
caution is required. The message itself is built on the ATIS roadside alert message which in turn uses the