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SAE J2735-Draft-Rev28 [issued: 11-10-08]
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91 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
Remarks: Range settings must match the range allowed by the subject data item. Units are as defined by
the subject data item.
6.53 Data Frame: DF_VehicleStatus
Use: A data frame that is used to relate specific items of the vehicles status. This structure relates all the
different types of information that can be related about the vehicle inside a probe message of in a BSM part
II section. Typically these are used in data event snapshots which are gathered and periodically reported to
an RSU or as part of the BSM Part II content.
Observe that this data structure makes use of other defined data elements and data frames, enclosing them
in a sequence structure so that a number of such items can be sent within the VehicleStatus instance but that
this data follows the definition of each defined elsewhere.
ASN.1 Representation:
VehicleStatus ::= SEQUENCE {
-- data which follows must still fit within any message size limits
lights ExteriorLights OPTIONAL, -- Exterior Lights
lightBar LightbarInUse OPTIONAL, -- PS Lights
wipers SEQUENCE {
statusFront WiperStatusFront,
rateFront WiperRate,
statusRear WiperStatusRear OPTIONAL,
rateRear WiperRate OPTIONAL
} OPTIONAL, -- Wipers
brakeStatus BrakeSystemStatus OPTIONAL,
-- 2 bytes with the following in it:
-- wheelBrakes BrakeAppliedStatus,
-- -x- 4 bits
-- traction TractionControlState,
-- -x- 2 bits
-- abs AntiLockBrakeStatus,
-- -x- 2 bits
-- scs StablityControlStatus,
-- -x- 2 bits
-- brakeBoost BrakeBoostApplied,
-- -x- 2 bits
-- spareBits
-- -x- 4 bits
-- Note that is present in BSM Part I
-- Braking Data
brakePressure BrakeAppliedPressure OPTIONAL, -- Braking Pressure
roadFriction CoefficientOfFriction OPTIONAL, -- Roadway Friciton
sunData SunSensor OPTIONAL, -- Sun Sensor
rainData RainSensor OPTIONAL, -- Rain Sensor
airTemp AmbientAirTemperature OPTIONAL, -- Air Temperature
airPres AmbientAirPressure OPTIONAL, -- Air Pressure
steering SEQUENCE {
angle SteeringWheelAngle,
confidence SteeringWheelAngleConfidence OPTIONAL,
rate SteeringWheelAngleRateOfChange OPTIONAL,
wheels DrivingWheelAngle OPTIONAL
} OPTIONAL, -- steering data
accelSets SEQUENCE {
vertAccelThres VerticalAccelerationThreshold, -- Wheel Exceeded point
vertAccel VerticalAcceleration, -- Vertical g Force Value
-- we do not have a DE for
-- vert Confidence
hozAccelLong Acceleration, -- Longitudinal Acceleration