 |
 |
 |
 |
|
 |
 |
SAE J2735-Draft-Rev18 [issued: 06-26-07]
-
209 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
value
= <DF_SpeedHeadingConfidence data (1 byte)>,
tag
= StdTagList.positionLong,
value
= <DF_PositionLong data (6 bytes)>,
tag
= StdTagList.positionConfidenceSet,
value
= <DF_PositionConfidenceSet data (1 byte)>,
tag
= StdTagList.positionShort,
value
= <DF_PositionShort data (6 bytes)>,
tag
= StdTagList.obstacleDirection,
value
= <DE_ObstacleDirection data (1 byte)>,
tag
= StdTagList.antiLockBrakeStatus,
value
= <DE_AntiLockBrakeStatus data (2 bits)>,
tag
= StdTagList.brakeAppliedPressure,
value
= <DE_BrakeAppliedPressure data (4 bits)>,
tag
= StdTagList.brakeAppliedStatus,
value
= <DE_BrakeAppliedStatus data (4 bits)>,
tag
= StdTagList.brakeBoostApplied,
value
= <DE_BrakeBoostApplied data (1 byte)>,
tag
= StdTagList.obstacleDistance,
value
= <DE_ObstacleDistance data (1 byte)>,
tag
= StdTagList.SteeringWheelAngleConfidence,
value
= <DE_SteeringWheelAngleConfidence data (2 bits)>,
tag
= StdTagList.steeringWheelAngleRateOfChange,
value
= <DE_SteeringWheelAngleRateOfChange data (1 byte)>,
tag
= StdTagList.steeringWheelAngle,
value
= <DE_SteeringWheelAngle data (1 byte)>
tag
= StdTagList.vehicleHeight,
value
= <DE_VehicleHight data (1 byte)>
tag
= StdTagList.vehicleLength,
value
= <DE_VehicleLength data (14 bits)>
tag
= StdTagList.vehicleMass,
value
= <DE_VehicleMass data (1 byte)>
tag
= StdTagList.vehicleType,
value
= <DE_VehicleType data (1 byte)>
tag
= StdTagList.vehicleWidth,
value
= <DE_VehicleWidth data (1 byte)>
},
-- Ad hoc data
valueCnt2
= 1,
item2 SEQUENCE(2) OF SEQUENCE {
tag
= <AH_CAWMap>,
data
= <AH_CAWMap data>
},
}
3.3
Message Send
This section illustrates a timeline for the MD. For this example, the following steps
would be representative of the MD behavior:
1.
The MD starts at time t by sending the Msg3Hz message.
2.
After 0.1 seconds, at time “t + 0.1”, the MD sends the Msg10Hz message.
3.
At time “t + 0.2”, the MD sends the Msg5Hz message. The Msg10Hz is not sent
since it is contained into Msg5Hz.
4.
At time “t + 0.3”, the MD sends the Msg10Hz message.
5.
At time “t + 0.4”, the MD sends the Msg3Hz message. The Msg5Hz and
Msg10Hz are not sent since they are both contained into Msg3Hz.
6.
At time “t + 0.5”, message Msg10Hz is sent.
7.
At time “t + 0.6”, message Msg5Hz is sent. At time “t + 0.7”, message Msg10Hz
is sent.
8.
At time “t + 0.8”, message Msg5Hz is sent.
9.
At time “t + 0.9”, message Msg3Hz is sent.