Voice group call service


The voice group call service is a mobile communication service for GSM, that allows subscribers to communicate to multiple other subscribers at the same time. For this special mobiles are required that support this function. A first deployment was seen with European Railways. This service is a feature of ASCI in GSM.

Description

This service allows speech conversation of a predefined group of service subscribers in half duplex mode on the radio link taking into account multiple mobile service subscribers involved in the VGCS call per cell.
The VGCS is applicable to all mobile stations in a certain network and area which have the technical capability and the corresponding subscription, respectively, to participate in a VGCS call.

Background

The first commercial use was for Railways. For GSM-Railway this is one of the most important features. VGCS is important to compete with TETRA for Professional Mobile Radio. This service is location dependent and therefore different from the Push to talk service.

Specification

This service is specified in the 3rd Generation Partnership Project since release 00 and in EIRENE.
3GPP TS 42.069
3GPP TS 43.069
3GPP TS 44.069
EIRENE Functional Requirements Specification

EIRENE System Requirements Specification