ISO TC 204 WG 16 CALM Update

Date: 30/5/2008

Source: http://www.calm.hu/

Communications, Air-interface, Long and Medium range (CALM), also known as Communications Access for Land Mobiles, is an initiative to define a set of wireless protocols and parameters for medium- and long-range, high-speed ITS communication across a variety of methods of transmission. The communication protocols form the foundations necessary for co-operative vehicles technology.

The CALM website states that “the service includes the following communication modes:

o        Vehicle-Infrastructure Multipoint communication parameters are automatically negotiated, and subsequent communication may be initiated by either roadside or vehicle;

o        Infrastructure-Infrastructure The communication system may also be used to link fixed points where traditional cabling is undesirable;

o        Vehicle-Vehicle A low latency peer-peer network with the capability to carry safety related data such as collision avoidance, and other vehicle-vehicle services such as ad-hoc networks linking multiple vehicles.”

Methods of transmission used by CALM include: infra-red; Global System for Mobile communications (GSM) and 5.9GHz Dedicated Short-Range Communications (DSRC).

CALM is hosted by ISO TC204 Working Group 16, Wide Area Communications / Protocols and Interfaces, which currently has three published standards:

o        ISO 15662:2006 Wide area comms., protocol management information

o        ISO 21214:2006 Infra-red systems

o        ISO 24101-1:2008 Application management, Part 1: General requirements

There are 18 other standards at various stages of development within the working group. The ITS Radar International Standards Spreadsheet contains further information on the status of each standard. The working group is split into seven sub-groups, which cover more specific areas.

The next meeting of Working Group 16 is due to be held in Paris between on 9th -13th June, 2008.

ITS Radar International will continue to monitor developments in CALM

Keywords: Communications, Cooperative vehicle systems, In-vehicle systems, Standard