The ad hoc Group CBMS (Convergence of Broadcast and Mobile Services) was formed in March 2001 (under the name UMTS) to draw up technical specifications and guidelines for applications and services that utilise 'co-operation' between broadcast and mobile telecommunications platforms.

In 2003 the group produced early specifications of the interface to the terminal in order to enable early trial deployments. In 2004, a set of detailed technical requirements were generated for an "IPDC in DVB-H" system. These requirements are the basis of the fundamental specification work for IPDC systems. The system specifications intend to focus on functionality, enabling delivery of IP-based services to small, personal, mobile handheld and portable terminals like cellular phones and PDA.

For all information regarding the DVB-H specification, and the related set of specifications for IP Datacast, please visit www.dvb-h.org.