Group Call number

M

E.164 number required to route the call from the anchor MSC to the relay MSC

Group Call number

M

E.164 number required to route the call from the anchor MSC to the relay MSC

TMSI

M

TMSI of the service subscriber for whom the request is sent

Group ID

M

see clause 9.

Teleservice

M

The teleservice Voice Group Call indicates that the request is for VGCS

IMSI

M

IMSI of the service subscriber for whom the request is sent

Additional info

C

Must be present if VGCS additional info is supported and additional info is assigned to the subscriber.

Additional subscriptions

C

Must be present if privilegedUplinkRequest , emergencyUplinkRequest or emergencyReset is subscribed by the service subscriber for whom the message is sent

Teleservice

M

The teleservice Voice Group Call indicates that a VGCS call has to be prepared

Group call reference

M

see clause 9

Cipher Algorithm, Group Key and Number

M

Information on the cipher algorithm and group key to be used

Priority

C

The default priority level must be present if eMLPP applies

Codec Info

M

Information on the codecs allowed for the VGCS call

Talker channel parameter

O

Indicates whether the network shall always establish and maintain a dedicated channel for the talking service subscriber

Uplink Reply Indicator

O

Indicates that the uplink reply procedure is applicable for the voice group call. Must be present if the GCR provides the corresponding information.

Group Call number

M

E.164 number required to route the call from the anchor MSC to the relay MSC

IMSI

C

The IMSI of the service subscriber who has initiated the call. Must be present if the call was initiated by a service subscriber in the relay MSC area

Talker priority

C

Must be present if the call was set up by a service subscriber in the relay MSC area with a talker priority higher than "normal subscriber"

Additional info

C

Must be present if VGCS additional info is supported and additional info is assigned to the currently talking service subscriber in the relay MSC area.

IMSI

C

IMSI of the service subscriber who has initiated the call. Must be present if the message is used to transfer the IMSI to the relay MSC

Uplink Request Acknowledgement flag

C

Must be present if the message is used as positive acknowledgement of an uplink request

Uplink Release Indication flag

C

Must be present if the message is used to indicate to the relay MSC that the uplink is no longer busy

Uplink Reject Command flag

C

Must be present if the message is used as negative acknowledgement of an uplink request

Uplink Seized Command flag

C

Must be present if the message is used to indicate to the relay MSC that the uplink has become busy

Uplink Release Command flag

C

Must be present if the message is used to indicate to the relay MSC that the uplink which is currently under control of the relay MSC has to be released

State Attributes

C

Must be present if the message is used to indicate to the relay MSC that the downlink for a talker served by the relay MSC has to be muted or unmuted.

Talker priority

C

Must be present in the same message as the Uplink Request Acknowledgement flag or Uplink Seized Command flag and is set to the talker priority of the new talking service subscriber, if this talker priority is higher than "normal subscriber".

Must be present in the same message as the Uplink Reject Command flag and is set to the talker priority of the currently talking service subscriber, if this talker priority is higher than "normal subscriber".

Additional info

C

Must be present if VGCS additional info is supported and the message is used to transfer additional info assigned to the currently talking service subscriber to the relay MSC.

Must be present in the same message as the Uplink Request Acknowledgement flag, Uplink Reject Command flag, or Uplink Seized Command flag, if a talker priority is included in the same message.

Emergency Mode Reset Command flag

C

Must be present if the message is used to indicate to the relay MSC that the emergency mode indication shall no longer be signalled

SM TPDU

C

The short message transfer protocol data unit received from the Service Centre. Must be present if the message is used to transfer the short message TPDU received from the SC.

Notification Data

C

Must be present if the message is used to indicate to the relay MSC that application-specific data shall be distributed in its area

Uplink Request flag

C

Must be present if the message is used to request uplink control from the anchor MSC

Uplink Release Indication flag

C

Must be present if the message is used to indicate to the anchor MSC that the uplink has become free

Talker priority

C

Must be present in the same message as the Uplink Request flag or Uplink Release Indication flag and is set to the talker priority of the service subscriber requesting or releasing the uplink, if this talker priority is higher than "normal subscriber"

Additional info

C

Must be present if VGCS additional info is supported and the message is used to transfer additional info assigned to the currently talking service subscriber to the anchor MSC.

Must be present in the same message as the Uplink Request flag, if the flag applies to a subscriber with a talker priority higher than "normal subscriber"

Emergency Mode Reset Command flag

C

Must be present if the message is used to indicate to the anchor MSC that the emergency mode indication shall no longer be signalled

Release Group Call flag

C

Must be present if the message is used to indicate to the anchor MSC that the VGCS call shall be released

Notification Data

C

Must be present if the message is used to indicate to the anchor MSC that application-specific data shall be distributed

Group call reference

M

see clause 9

SM Originating Address

M

The originating address used by the short message service relay sub-layer protocol.

SM TPDU

M

The short message transfer protocol data unit received from the Service Centre.

Status of the voice group call

M

Indicating whether the voice group call is established or not.

Dispatcher List

O

A list of dispatcher identities received from the GCR.

Teleservice

M

The teleservice Voice Group Call indicates that the request is for VGCS

Requested Info

M

Indicates whether

a) IMSI, Additional Info, and Additional Subscriptions or

b)Anchor MSC Address and Group CallReference

are requested

TMSI

C

TMSI of the service subscriber for whom the request is sent.

Shall be present if IMSI, Additional Info and Additional Subscriptions are requested.

Group ID

M

see clause 9.

Cell Id

C

Identification of the cell where the group call initiating service subscriber is located.

Shall be present if Anchor MSC Address and Group Call Reference are requested

IMSI

C

IMSI of the service subscriber for whom the request is sent.

Shall be present if Anchor MSC Address and Group Call Reference are requested

Additional info

C

Shall be present if subscribed and if Anchor MSC Address and Group Call Reference are requested

Talker priority

C

Shall be present if Anchor MSC Address and Group Call Reference are requested and the talker priority is higher than "normal subscriber"

IMSI

C

IMSI of the service subscriber for whom the request is sent.

Shall be present if it was requested.

Additional info

C

Shall be present if requested and VGCS additional info is supported and additional info is assigned to the subscriber.

Additional subscriptions

C

Shall be present if requested and privilegedUplinkRequest , emergencyUplinkRequest or emergencyReset is subscribed by the service subscriber for whom the message is sent

Anchor MSC Address

C

E.164 number required to route the call from the VMSC to the anchor MSC. Shall be present if requested

Group call reference

C

see clause 9. Shall be present if requested.

Group call reference

C

see clause 9. Must be present if the VGCS call was initiated by a dispatcher or by a service subscriber in the relay MSC area and the receiving GCR is associated to the anchor MSC, or if the receiving GCR is associated to a relay MSC and the GCR interrogation was triggered by a Prepare Group Call message received from the anchor MSC.

Group ID

C

see clause 9. Must be present if one of the following conditions is fulfilled:

1) the MSC is the visited MSC of the service subscriber initiating the VGCS call, except if the MSC is a relay MSC and the GCR interrogation was triggered by a Prepare Group Call message received from the anchor MSC;

2) the GCR interrogation was triggered by a Send Group Call Info message received from the VMSC.

Originating Cell ID

C

see clause 9. Must be present if one of the following conditions is fulfilled:

1) the MSC is the visited MSC of the service subscriber initiating the VGCS call, except if the MSC is a relay MSC and the GCR interrogation was triggered by a Prepare Group Call message received from the anchor MSC;

2) the GCR interrogation was triggered by a Send Group Call Info message received from the VMSC.

CLI

C

Calling Line Identity of the initiating dispatcher, or VGCS prefix plus group call reference in case of service subscriber originated VGCS call in the relay MSC, . Must be present if the MSC is not the visited MSC of the service subscriber initiating the VGCS call.

Relay MSC indicator

M

A flag indicating whether the GCR interrogation was triggered from a Prepare Group Call message received from the anchor MSC

Group Call Serving MSC indicator

C

A flag indicating whether the GCR interrogation was triggered from a Send Group Call Info message received from the VMSC. May be set to "yes" in a RANflex configuration (with or without group call redundancy) only.

IMSI

C

IMSI of the service subscriber who has initiated the VGCS call. Must be present if the MSC is the visited MSC of the service subscriber initiating the VGCS call, or the GCR interrogation was triggered by a Send Group Call Info message received from the VMSC

Talker priority

C

Talker priority of the service subscriber who has initiated the VGCS call. Must be present if the MSC is the visited MSC of the service subscriber initiating the VGCS call, or the GCR interrogation was triggered by a Send Group Call Info message containing a talker priority received from the VMSC

Additional info

C

Additional info of the service subscriber who has initiated the VGCS call. Must be present if the MSC is the visited MSC of the service subscriber initiating the VGCS call, or the GCR interrogation was triggered by a Send Group Call Info message containing additional info received from the VMSC

Uplink Reply Indicator

O

Indicates that the uplink reply procedure is applicable for the voice group call. Must be present if the MSC is the anchor MSC and the related flag exists and is set in the GCR

Ongoing Call Override Indication

C

Indicates that the GCR shall delete any ongoing call information before processing the request.

May be set to "yes" in a RANflex configuration with group call redundancy only.

Group call reference

C

Must be present if the GCR receives an interrogation request containing a Group ID and an Originating Cell ID.

Cell List

C

A list of cells inside the MSC area into which the call is to be sent. Must be present if a) no anchor MSC address is present in the group call reference record and the GCR interrogation was not triggered by a Send Group Call Info message, or b) the relay MSC indicator was set in the GCR Interrogation message

Anchor MSC Address

C

E.164 number required to route the call from the relay MSC and in a RANflex configuration (with or without group call redundancy) from the VMSC to the anchor MSC. Must be present if the anchor MSC Address is present in the group call reference record

Relay MSC List

C

A list of relay MSCs into which the call is to be sent. Must be present if a relay MSC list is present in the group call reference record and the GCR interrogation was not triggered by a Send Group Call Info message

Group Key and Number

C

Information on the cipher algorithm and the group key to be used. Must be present if Group Key and Number is present in the group call reference record and the GCR interrogation was not triggered by a Send Group Call Info message

Codec Information

C

Information on the codecs allowed for the voice broadcast call. Must be present if Codec Info is present in the group call reference record and the GCR interrogation was not triggered by a Send Group Call Info message

Establish to Dispatcher List

C

A list of identities of dispatchers to which a dedicated link is to be established. Must be present if included in the group call reference record. Note that the CLI possibly received with the GCR interrogation message must not be included

Release from Dispatcher List

C

A list of identities of dispatchers which are allowed to terminate the voice group call. Must be present if included in the group call reference record and the GCR interrogation was not triggered by a Send Group Call Info message

Priority

C

The default priority level related to the voice group call if eMLPP applies. Must be present if included in the group call reference record and the GCR interrogation was not triggered by a Send Group Call Info message

IMSI

C

IMSI of the service subscriber who has initiated the VGCS call. Must be present if the Relay MSC Indicator was set in the GCR interrogation message and the IMSI is present in the group call reference record

No Activity Time

C

The length of the time over which no activity is detected before the voice group call is automatically terminated

Talker priority

C

Talker priority of the service subscriber who has initiated the VGCS call. Must be present if talker priority is present in the group call reference record

Additional info

C

Additional Info of the service subscriber who has initiated the VGCS call. Must be present if additional info is present in the group call reference record

Originating Cell ID

C

Must be present if originating cell id is present in the group call reference record

Talker channel parameter

O

Indicates whether the network shall always establish and maintain a dedicated channel for the talking service subscriber

Group call reference

M

see clause 9

Group call reference

M

see clause 9

Status of the voice group call

M

Indicating whether the voice group call is established or not.

MSC Address

C

In a RANflex configuration with group call redundancy: Address of the MSC within the redundancy pool at which the group call is ongoing.

Dispatcher List

O

A list of identities of dispatchers connected to an established voice group call.

Teleservice

M

The teleservice Voice Group Call indicates that a VGCS call has to be prepared

Group call reference

M

see clause 9

Initial Talker Information

C

see subclause 8.1.3.2

on-going indication

C

indicates by its present that the group call is ongoing

MSC Address

C

Address of the sending GCR’s associated MSC, at which the group call is ongoing.

call released indication

C

indicates by its presence that the group call is no longer ongoing.

override indication

C

indicates by its presence that the receiving GCR shall replace the stored MSC-Address with the received value.

request indication

C

indicated by its presence that the sending GCR requests ongoing information and MSC Address from the receiving GCR

Status of the voice group call

C

Indicating whether the voice group call is established or not.

MSC Address

C

Address of the MSC, at which the group call is ongoing.

Initial Talker Information

C

see subclause 8.1.3.2