10 Sa1 Features

10.1 Enhancements for Voice Group Call Service (vgcs) Applications (eva) uid_7042

Resources: S1,C1,C4,G2

References

Document	Title/Contents
WID(s)
SP-070904	S1 WID on Enhancements for Voice Group Call Service (VGCS) Applications (EVA)
SP-070653	S1 WID on VGCS/VBS and GPRS Interactions
CP-060260	C1 WID on Enhancements for VGCS Applications
GP-071855	G2 WID on Enhancements for VGCS Applications
Impacted Specifications
TS 42.068	Voice Group Call Service (VGCS); Stage 1 - SA1
TS 42.069	Voice Broadcast Service (VBS); Stage 1 - SA1
TS 43.068	Voice Group Call Service (VGCS); Stage 2 - CT1
TS 44.068	Group Call Control (GCC) protocol - CT1
TS 29.002	Mobile Application Part (MAP) specification - CT4
TS 48.008	Stage 3 enhancements for the transfer of application specific data - G2
TS 44.018	Stage 3 enhancements for the transfer of application specific data - G2
New Dedicated Specifications/Reports
-	-

Supporting Individual Members: Nortel Networks, Nokia Siemens Networks, Huawei, Vodafone.

UID	Name	Resource	Hyperlink	TS_TR
7042	Enhancements for Voice Group Call Service (VGCS) Applications (EVA)	-	SP-070904
320021	SA1 aspects of EVA	S1	SP-070904	42.068
370019	VGCS/VBS and GPRS Interactions	S1	SP-070653	42.068, 42.069
320019	CT1 aspects of EVA	C1	CP-060260	43.068, 44.068
320020	CT4 aspects of EVA	C4	CP-060260	29.002
52148	GERAN2 aspects of EVA	G2	GP-071855	44.018, 48.008

Enhancements for VGCS Applications (EVA) Stage 1:

SA1 work under WID SP-070904 provides additional optional Voice Group Call Service (VGCS) functions to allow for the support of VGCS applications in railway and public networks, including:

• Transfer of railways application-specific control information, requiring short round trip delay. Railways requirement is for the transfer of shunting commands from the chief shunter to group members, to be acknowledged by the train cab driver.

• A means to request dispatchers to rejoin a group call. Railways requirement is for a simple solution (e.g. pressing a single button, and without the requestor having to leave the group call). Use of a point-to-point call for contacting the dispatcher is not acceptable because too many MMI actions would be needed.

• Listener identity information – useful for public authority application (e.g. a police chief wants to know who is listening in order to assign tasks to group members) and railway networks (e.g. for dispatchers to identify if members are listening). - not fulfilled by G2 - see GP-071855

This service provides the ability to:

• Send and receive a small amount of data between group members, including dispatchers;

• Send an indication/ small amount of data from service subscribers to the network;

• Transfer critical data within a short time period (500ms) without impacting voice quality of the group call;

• Gather information on the identities of current listeners, which should not be older than a specified time interval, and to inform dispatchers on the identities of current listeners. Also, this information may be provided to service subscribers. - not fulfilled by G2 - see GP-071855

GERAN2 added in existing TS 48.008 and TS 44.018 additional optional VGCS functions meeting the above purposes. The intent was to have a future-proof solution that can be used to meet potential future application needs.