Content for TS 43.068 Word version: 18.0.0
1 Scope p. 7
The present document specifies the stage two description of the Voice Group Call Service (VGCS) which allows speech conversation of a predefined group of service subscribers in half duplex mode on the radio link taking into account multiple subscribers involved in the group call per cell.
2 References p. 7
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1] Void.
[1a]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
TS 42.068: "Voice Group Call Service (VGCS); Stage 1".
[3]
TS 43.022: "Functions related to Mobile Station (MS) in idle mode".
[4]
TS 23.067: "enhanced Multi-Level Precedence and Pre-emption service (eMLPP); Stage 2".
[5]
TS 44.018: "Mobile radio interface layer 3 specification; Radio Resource Control Protocol".
[6]
TS 45.008: "Radio subsystem link control".
[7]
TS 24.008: "Mobile radio interface Layer 3 specification; Core network protocols; Stage 3".
[8]
ITU-T Recommendation E.164: "The international public telecommunication numbering plan".
[9]
TS 42.009: (Rel-4): "Security aspects".
[10]
TS 43.020: "Security related network functions".
[11]
TS 44.068: "Group Call Control (GCC) protocol".
[12]
TS 22.083: "Call Waiting (CW) and Call Hold (HOLD) supplementary services; Stage 1".
[13]
TS 29.002: "Mobile Application Part (MAP) specification".
[14]
TS 23.040: "Technical realization of the Short Message Service (SMS)".
[15]
TS 24.011: "Point-to-Point (PP) Short Message Service (SMS) support on mobile radio interface".
[16]
TS 28.062: "Inband Tandem Free Operation (TFO) of Speech Codecs; Service Description; Stage 3".
[17]
TS 23.236: "Intra-domain connection of Radio Access Network (RAN) nodes to multiple Core Network (CN) nodes".
[18]
TS 23.018: "Basic call handling; Technical realization".
[19]
ETSI TS 103 389: "Usage of Session Initiation Protocol (SIP) on the Network Switching Subsystem (NSS) to Fixed Terminal Subsystem (FTS) interface for GSM Operation on Railways".
3 Definitions and abbreviations p. 8
3.1 Definitions p. 8
For the purposes of the present document, the terms and definitions given in TS 42.068 and the following apply:
group call anchor MSC:
the MSC responsible for managing and maintaining a particular voice group call. The group call anchor MSC is determined as the one controlling the cells of the group call area (see also group call relay MSC). For a voice group call where the group call area exceeds one MSC area, the group call anchor MSC is predefined in the network. In a RANflex configuration with group call redundancy, the group call anchor MSC redundancy pool (instead of a group call anchor MSC) is predefined in a network for a given voice group call.
Group Call Attributes (GCA):
group call area, dispatcher identities, and the non-activity time which results in the release of the voice group call by the network
group call relay MSC:
the MSC controlling cells of a group call area which are not under control of the group call anchor MSC for those voice group call services where the group call area exceeds one MSC area. For a voice group call where the group area exceeds one MSC area, the address of the group call relay MSC is pre-configured in the anchor MSC's GCR. In a RANflex configuration with group call redundancy this preconfigured address identifies a group call relay MSC redundancy pool (instead of a group call relay MSC).
Group Call Register (GCR):
functionality in the network containing the group call attributes
group call serving MSC:
In a RANflex configuration the group call serving MSC of a location area is a group call anchor MSC or a group call relay MSC that controls the group call signalling for this location area. A location area within the pool area has a unique group call serving MSC, or - in a RANflex configuration with group call redundancy - a unique group call serving MSC redundancy pool. For a given group call at any location, the group call serving MSC is either the anchor MSC or one of the relay MSCs controlling the group call. For a service subscriber located in this location area the visited MSC may be different from the location area's group call serving MSC.
In a RANflex configuration all location areas within a BSC service area are assigned to the same group call serving MSC.
In a RANflex configuration with group call redundancy all location areas within a BSC service area are assigned to the same group call serving MSC redundancy pool.
group call serving MSC redundancy pool:
A pool of group call serving MSCs each of which can take the same role for a given group call (anchor /relay) and serve the same location areas within a RANflex pool area with group call services. For a given voice group call a location area's group call serving MSC redundancy pool is either the group call anchor MSC redundancy pool or one of the group call relay MSC redundancy pools.
group call anchor MSC redundancy pool:
A group call serving MSC redundancy pool. Each MSC within the group call anchor MSC redundancy pool can take the role of the group call anchor MSC for a given group call. For a given instance of a voice group call one group call anchor MSC is selected from the group call anchor MSC redundancy pool.
group call relay MSC redundancy pool:
A group call serving MSC redundancy pool. Each MSC within the group call relay MSC redundancy pool can take the role of the group call relay MSC for a given group call. For a given instance of a voice group call one group call relay MSC is selected from every relevant group call relay MSC redundancy pool.
group members:
service subscribers entitled to belong to a particular group classified by a certain group identification (group ID)
group mode dedicated channel:
In this mode, a mobile station participating in an ongoing voice group call is allocated at least two dedicated channels, only one of them being a SACCH
notification:
notifications are given on common control channels or dedicated channels in order to inform group members which are either in idle mode or in dedicated mode or participating in a voice group call or voice broadcast call on the existence of voice group calls
Notification CHannel (NCH):
common control channel on which the notifications are sent by the network (equivalent to a paging channel)
originator-to-dispatcher information:
information sent by the service subscriber originating a voice group call to the network during call setup for distribution to the dispatchers to be attached to the group call during call setup
RANflex configuration:
A network configuration that allows a location area to be served by multiple MSCs in parallel. For details see TS 23.236. In a RANflex configuration a given location area is associated with a single group call serving MSC. There is no support of group call redundancy.
RANflex configuration with group call redundancy:
A RANflex configuration where a given location area is associated with a group call serving MSC redundancy pool (instead of with a single group call serving MSC). For a given voice group call a location area's group call serving MSC redundancy pool may be a group call anchor MSC redundancy pool or a group call relay MSC redundancy pool.
voice group call channel:
combined uplink/downlink to be allocated in a cell of the group call area for a particular voice group call.The uplink can be used by the presently talking service subscriber only. All mobile stations of the listening service subscribers in one cell shall listen to the common downlink.
voice group call member:
any group member or dispatcher participating in an on going voice group call
point-to-point short message:
information that may be transferred between a mobile station and a Service Center
time-critical application-specific data:
application-specific data which shall be transferred within the time limitation specified in TS 42.068.
For the purposes of the present document, the following terms and definitions given in TS 24.008 apply.
dedicated mode
group receive mode
group transmit mode
3.2 Abbreviations p. 9
For the purpose of the present document, the abbreviations given in TR 21.905 and the following apply:
AMR
Adaptive Multi-Rate
AoIP
A over IP, using IP as the bearer of the user plane of A interface.
CC
Country Code
D-ATT
Downlink Attach
DA
Downlink Attach
DRX
Discontinuous reception
DTMF
Dual Tone Multi Frequency
EFR
Enhanced Full Rate
eMLPP
enhanced Multi-Level Precedence and Pre-emption
GCA
Group Call Attributes
GCR
Group Call Register
NCH
Notification Channel
NDC
National Destination Code
SN
Subscriber Number
UA
Uplink Attach
VBS
Voice Broadcast Service
VGCS
Voice Group Call Service
