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SAE J2735-Draft-Rev29 [issued: 12-11-08]
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8
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This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
Annex C-7 Lane Change Warning...............................................................................246
Application Description.................................................................................................246
Concept of Operations...................................................................................................247
Sensors and Other System Needs...................................................................................247
Annex D: Traveler Information Message Use and Operation......................................248
Traveler Information Introduction................................................................................248
Traveler Information Packet Structure
.........................................................................248
Packet Format Diagram
................................................................................................250
Traveler Advisory Example...........................................................................................250
Road Sign Example
.......................................................................................................252
Application and Use with DSRC....................................................................................252
Handling Repeated Packets
...........................................................................................................................253
Handling Newly Received Data Frames.....................................................................................................254
Replacement Policy for Locally-Stored Messages
...................................................................................255
Pruning Messages by In-vehicle Housekeeping........................................................................................
255
Updated Messages from Network
...............................................................................................................
256
Deleting Messages as Directed by Network User.....................................................................................
256
Vehicle Power-Up Events.............................................................................................................................
256
Presentation of Signs & Advisories in Vehicle
...............................................................256
Valid Time
.........................................................................................................................................................256
Valid Region.....................................................................................................................................................258
Circular Region.................................................................................................................................................258
Polygon Region..................................................................................................................................................259
Shape Point Set Region
...................................................................................................................................260
Extremely Large Regions
...............................................................................................................................261
Annex E Traffic Probe Message Use and Operation
....................................................262
Probe Data Introduction................................................................................................262
Probe Message Structure...............................................................................................262
Application and Use with DSRC....................................................................................264
Probe Snapshot Generation...........................................................................................264
Periodic Snapshots.........................................................................................................265
Event Triggered Snapshots............................................................................................267
Starts and Stops Snapshots............................................................................................267
Message Transmission Order
........................................................................................267
Probe Data Message Sets Received By an RSU..............................................................271
Vehicle Anonymity
........................................................................................................271
Probe Data Security.......................................................................................................271
Probe Data Message Management.................................................................................271
Probe Message Management: Time or Distance Periodic Snapshot Generation
...........272
Probe Message Management: Interval between Probe Message Broadcasts
.................273
Probe Message Management: Termination...................................................................273
Probe Message Management: Vehicle Status Element Triggers....................................273
Probe Message Management: Vehicle Sampling...........................................................273
Probe Message Management: Managed Vehicle Heading.............................................274
Probe Message Management: Start and Stop Threshold Settings
.................................274