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Link Layer
- Ground Vehicle Standard
- J2366/2_200111
- Issued
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
This SAE Recommended Practice details the Link Layer of the Intelligent Transportation Systems (ITS) Data Bus, which is generally intended for in-vehicle use.
The ITS Data Bus (IDB) is a non-proprietary token passing bus, designed to allow disparate consumer, vehicle, and commercial electronic components to communicate and share information across a standard, open data bus. This first version of the IDB is called IDB-C.
This Recommended Practice describes the Link Layer of the IDB-C, as shown in Section 1. Below the Link Layer of the IDB-C is the CAN 2.0B Link Layer. The Physical Layer of the IDB-C incorporates the Physical Layer as specified by SAE J2366-1 and J2590.
The IDB-C Link Layer is logically divided into two functional sub-layers, viz., Logical Link Control (LLC) and Media Access Control (MAC). However, these are logical groupings that re-use some of the same bits within the CAN 2.0B frame for efficiency.
The MAC sub-layer handles all media access functions, such as virtual token handling, addressing, and notifications of IDB-C configuration changes to other MAC layers on the IDB-C.
The LLC sub-layer provides the mechanisms to send and receive point-to-point or broadcast frames to other LLC sub-layers on the IDB-C. In addition, the LLC provides an Alternate Transport Identifier (ATID) allowing more than one set of higher layer protocols to be used on a single Node.
Topic
Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| TABLE 1 | PHYSICAL NODE ID TRANSMISSION VALUES | |
| TABLE 2 | TOKEN HOLD TIME MAXIMUMS | |
| TABLE 3 | CAN ELEMENTS | |
| TABLE 4 | MAC FRAME IDS DEFINED |
Issuing Committee
Reference
| Number | Title |
|---|---|
| CAN Specification, Version 2.0B | This document is not part of the subscrption. |
| CANSpecificatio | This document is not part of the subscrption. |
| ISO7498:1990 | This document is not part of the subscrption. |
| J2355 | This document is not part of the subscrption. |
| J2366-1 | This document is not part of the subscrption. |
| J2366-4 | This document is not part of the subscrption. |
| J2366-7 | This document is not part of the subscrption. |
| J2366/1 | This document is not part of the subscrption. |
| J2366/4 | This document is not part of the subscrption. |
| J2366/7 | This document is not part of the subscrption. |
| J2590 | This document is not part of the subscrption. |
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