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SAE J2735-Draft-Rev29 [issued: 12-11-08]
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This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
3.89 transactions: Bi-directional data exchanges between devices (RSUs and OBUs).
3.90 value domain: A well known range of values, or terminology, or enumeration that many be
referenced as an abstract type the ITS data register but no longer used. There are very many value domains
used in ITS standards.
3.91 vehicle host: A device connecting to the WAVE system through the OBU vehicle host interface.
3.92 vehicle type: In the context of this standard the vehicle type is a data element used to define overall
gross size and mass of a vehicle, Observe that this definition differs from the (multiple other) vehicle types
defined elsewhere in other standards used in the ITS.
3.93 Walk Interval: An interval during which the WALKING PERSON (symbolizing WALK) signal
indication is displayed. When a verbal message is provided at an accessible pedestrian signal, the verbal
message is “walk sign.”
3.94 warning beacon: A beacon used only to supplement an appropriate warning or regulatory sign or
marker.
3.95 WAVE device: A device that contains a WAVE-conformant medium access control (MAC) and
physical layer (PHY) interface to the wireless medium. (See IEEE 802.11 and IEEE 1609.4)
3.96 WAVE management entity (WME): The set of management functions, as defined in IEEE Std 1609
documents, required to provide WAVE Networking Services.
3.97 WAVE service information element (WSIE): A collection of configuration data transmitted by
either OBU or RSU, which includes the Provider Service Table, and in the case of the RSU the WAVE
Routing Advertisement, as well as security credentials.
3.98 wireline: Connected via a traditional communications interface; not the wireless interface specified
here.
3.99 XML: A common method of exchanging messages made up of tags and values organized in a data
structure and typically transported over common Internet formats such as HTTP. XML has a growing
number of supporters due to its ability to be implemented in the types of heterogeneous systems often
found in ITS deployments. It is possible to express and exchange the DSRC message sets using this
method; XML schema definitions are provided in the latter clauses of the standard.
3.100 yellow change interval: The first interval following the green interval during which the yellow
signal indication is displayed. In the SPAT message the fixed duration of the yellow change interval is
(optionally) provided for each active lane being described.