This new document, at a minimum a recommended practice, will use as a basis the existing SAE J2945/1 to a version that uses LTE V2X (Long Term Evolution Vehicle to X) as specified in 3GPP (3rd Generation Partnership Project) R-14 as the radio access technology and on-board vehicle-to-vehicle (V2V) safety communications system for light vehicles. This new document addresses the on-board system needs for ensuring that the exchange of BSMs (Basic Safety Messages) in V2V safety communications provides the desired interoperability and data integrity to support the performance of the envisioned safety applications. Specifically, this new document will include standards profiles, functional requirements, and performance requirements. Specifically, this document will be written to enable LTE V2X to transmit and receive the Society of Automotive Engineers (SAE) J2735-defined BSM over a LTE V2X wireless communications link and will define specific portions of underling standards in 3GPP and in the Institute of Electrical and Electronics Engineers (IEEE) 1609 suite. The purpose of the work will be to adapt the existing text of SAE J2945/1 to the air interface defined by 3GPP.
The C-V2X radio access technology has a number of unique features that differentiate it from the IEEE 802.11p PHY/MAC layers as assumed in the SAE J2945/1 document. There are several sections in the J2945/1 document that specifically assume the 802.11p PHY/MAC and need to be re-written to properly take advantage of the C-V2X radio access layers. By making these changes to the J2945/1 document to create a new document, the 5G Cellular Evolution Technical Committee can use the features developed in C-V2X by 3GPP to their greatest advantage while reusing as much as possible of the extensive work done in SAE to enable V2X communication.