District of Columbia ITS Architecture

Dedicated Short Range Communication at 915 MHz Standards Group

Overview

In commercial vehicle (CVO) applications, this standards group covers the interface between commercial vehicles and roadside equipment and includes the following standards:  
* ASTM E2158-01: Standard Specification for Dedicated Short Range Communication (DSRC) Physical Layer using Microwave in the 902-928 MHz Band  
* ASTM Draft Standard for Dedicated Short Range, Two-Way Vehicle to Roadside Communications Equipment, Draft 6, 23 February 1996, Layer 2 Data Link Layer 

In the CVO community, these two standards together with "IEEE Std 1455-1999: Standard for Message Sets for Vehicle/Roadside Communications" are commonly known as the "sandwich spec", and are the de facto standards for many current CVO programs, particularly CVO electronic screening. The physical layer is used in active mode and the data link layer in synchronous mode to facilitate national interoperability. Although the ASTM E2158-01 standard has been recently withdrawn by the standards development organization, ASTM, the “sandwich spec” is still widely deployed, and therefore will be retained as a standard for CVO programs. Alternative standards are currently under consideration for future deployments.  

For non-commercial vehicle (CVO) applications, the 915 MHz standards group includes the following Standards Activities: 
* ASTM E2158-01: Standard Specification for Dedicated Short Range Communication (DSRC) Physical Layer using Microwave in the 902-928 MHz Band

Includes