10.3.2 Information flows for group call over interworking group

23.2833GPPMission Critical Communication Interworking with Land Mobile Radio SystemsRelease 18TS

10.3.2.1 General

The following subclauses define information flows for group calls on the IWF-1 interface. Group call related information flows on reference points other than IWF-1 are defined in 3GPP TS 23.379 [7].

10.3.2.2 IWF group call request

Table 10.3.2.2-1 describes the information flow IWF group call request from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.2-1: IWF group call request information elements

Information Element

Status

Description

MCPTT ID

(see NOTE 1)

M

The MCPTT ID of the calling party

Functional alias

O

The functional alias of the calling party

MCPTT group ID

M

The MCPTT group ID of the interworking group on which the call is initiated

SDP offer

M

Media parameters of MCPTT server

Implicit floor request
(see NOTE 2)

O

Indicates that the originator requests the floor.

Broadcast indicator

O

Indicates that the group call request is for a broadcast group call

Location

O

Location of the calling party

NOTE 1: If the LMR system does not provide the calling party identity when the group call is originated from the LMR system, then this information element may be set to a MCPTT ID reserved for LMR user at the IWF.

NOTE 2: This element shall be included only when the originating client requests the floor.

10.3.2.3 IWF group call response (IWF – MCPTT server)

Table 10.3.2.3-1 describes the information flow IWF group call response from the MCPTT server to the IWF and from the IWF to MCPTT server.

Table 10.3.2.3-1: IWF group call response information elements

Information Element

Status

Description

MCPTT ID

M

The MCPTT ID of the target MCPTT group member

MCPTT group ID

M

The MCPTT group ID of the group on which the call is requested

SDP answer

M

Media parameters selected

10.3.2.4 IWF Group-broadcast group call setup request

Table 10.3.2.4-1 describes the information flow IWF group-broadcast group call setup request from the MCPTT server to the IWF and from the IWF to the MCPTT server.

Table 10.3.2.4-1: IWF Group-broadcast group call setup request information elements

Information Element

Status

Description

MCPTT ID

(see NOTE 1)

M

The MCPTT ID of the calling party

Functional alias

O

The functional alias of the calling party

MCPTT group ID

M

The MCPTT group ID of the group on which the call is requested

SDP offer

M

Media parameters of MCPTT clients

Implicit floor request

(see NOTE 2)

O

Indicates that the originating client requests the floor

Location

O

Location of the calling party

NOTE 1: If the LMR system does not provide the calling party identity when the group-broadcast group call setup request is originated from the LMR system, then this information element may be set to a MCPTT ID reserved for the LMR user at the IWF.

NOTE 2: This element shall be included only when the originating client requests the floor.

10.3.2.5 IWF Group-broadcast group call setup response

Table 10.3.2.5-1 describes the information flow IWF group-broadcast group call setup response from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.5-1: IWF Group-broadcast group call setup response information elements

Information Element

Status

Description

MCPTT ID

M

The MCPTT ID of the calling party

MCPTT group ID

M

The MCPTT group ID of the group on which the call is requested

SDP answer

M

Media parameters selected

10.3.2.6 IWF Group-broadcast group call release request

Table 10.3.2.6-1 describes the information flow IWF group-broadcast group call release request from the MCPTT server to the IWF and from the IWF to the MCPTT server.

Table 10.3.2.6-1: IWF Group-broadcast group call release request information elements

Information Element

Status

Description

MCPTT ID

M (see NOTE)

The MCPTT ID of the MCPTT group member

MCPTT group ID

M

The MCPTT group ID of the group on which the call is released

NOTE: If the LMR system does not provide the calling party identity when the group-broadcast group call release request is originated from the LMR system, then this information element may be set to a MCPTT ID reserved for the LMR user at the IWF.

10.3.2.7 IWF group-broadcast group call release response

Table 10.3.2.7-1 describes the information flow IWF group-broadcast group call release request from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.7-1: IWF Group-broadcast group call release response information elements

Information Element

Status

Description

MCPTT ID

M

The MCPTT ID of the target MCPTT group member

MCPTT group ID

M

The MCPTT group ID of the group on which the call is released

10.3.2.8 IWF group join request

Table 10.3.2.8-1 describes the information flow IWF group join request from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.8-1: IWF group join request information elements

Information Element

Status

Description

MCPTT ID

M

The MCPTT ID of the originator of the request.
(see NOTE 1)

Functional alias

O

The functional alias of the calling party

MCPTT group ID

M

The MCPTT group ID of the group to which the group communication is requested

SDP offer

M

Media parameters of originator

Implicit floor request
(see NOTE 2)

O

Indicates that the originating client requests the floor.

NOTE 1: The IWF is configured with an MCPTT ID for use when the IWF is affiliating itself to the group on behalf of the LMR system.

NOTE 2: This element is included only when the originating client requests the floor.

10.3.2.9 IWF group join response

Table 10.3.2.9-1 describes the information flow group join response from the MCPTT server to the IWF and from the IWF to the MCPTT server.

Table 10.3.2.9-1: IWF group join response information elements

Information Element

Status

Description

MCPTT ID

M

The MCPTT ID of the originator of the request.

(see NOTE)

MCPTT group ID

M

The MCPTT group ID of the group to which the group communication is requested

SDP answer

M

Media parameters selected

NOTE: The IWF is configured with an MCPTT ID for use when the IWF is affiliating itself to the group on behalf of the LMR system.

10.3.2.10 IWF group call leave request

Table 10.3.2.10-1 describes the information flow IWF group call leave request from the MCPTT server to the IWF and from the IWF to the MCPTT server.

Table 10.3.2.10-1: IWF group call leave request information elements

Information Element

Status

Description

MCPTT ID

M

The MCPTT ID of the MCPTT group member

MCPTT group ID

M

The MCPTT group ID of the group from which the user is leaving

10.3.2.11 IWF group call leave response

Table 10.3.2.11-1 describes the information flow IWF group call leave response from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.11-1: IWF group call leave response information elements

Information Element

Status

Description

MCPTT ID

M

The MCPTT ID of the MCPTT group member

MCPTT group ID

M

The MCPTT group ID of the group from which the user is leaving

10.3.2.12 IWF group call release request

Table 10.3.2.12-1 describes the information flow IWF group call release request from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.12-1: IWF group call release request information elements

Information element

Status

Description

MCPTT ID

(see NOTE)

O

The MCPTT ID of the initiating MCPTT group member

MCPTT group ID

M

The MCPTT group ID of the group on which the call is released

Release reason

O

The reason why the call is released

NOTE: This IE is not included if the group call release is initiated by the server (e.g. due to timeout)

10.3.2.13 IWF group call release response

Table 10.3.2.13-1 describes the information flow IWF group call release response from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.13-1: IWF group call release response information elements

Information Element

Status

Description

MCPTT ID

M

The MCPTT ID of the target MCPTT group member

MCPTT group ID

M

The MCPTT group ID of the group on which the call is released.

10.3.2.14 IWF pre-configured regroup request

Table 10.3.2.14-1 describes the information flow IWF pre-configured regroup request from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.14-1 IWF pre-configured regroup request information elements

Information Element

Status

Description

MCPTT ID

M

The MCPTT ID of the requester

MCPTT group ID

M

MCPTT group ID of the regroup group

MCPTT group ID

M

MCPTT group ID of the MCPTT group from which configuration is to be taken

MCPTT group ID list

O

(see NOTE)

List of MCPTT groups to be regrouped into the pre-configured regroup group

MCPTT ID list

O

(see NOTE)

List of MCPTT IDs to be regrouped into the pre-configured user regroup group

NOTE: One and only one of these shall be present.

10.3.2.15 IWF pre-configured regroup response

Table 10.3.2.15-1 describes the information flow IWF pre-configured regroup response from IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.15-1 IWF pre-configured regroup response information elements

Information Element

Status

Description

MCPTT ID

M

The MCPTT ID of the requester of the regrouping operation

MCPTT group ID

M

MCPTT group ID of the regroup group

Result

M

Result of the regrouping operation

10.3.2.16 IWF pre-configured regroup cancel request

Table 10.3.2.16-1 describes the information flow pre-configured regroup cancel request from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.16-1 IWF pre-configured regroup cancel request information elements

Information Element

Status

Description

MCPTT ID

M

The MCPTT ID of the requester

MCPTT group ID

M

MCPTT group ID of the regroup group

10.3.2.17 IWF pre-configured regroup cancel response

Table 10.3.2.17-1 describes the information flow IWF pre-configured regroup cancel response from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.17-1 IWF pre-configured regroup cancel response information elements

Information Element

Status

Description

MCPTT ID

M

The MCPTT ID of the requester of the regroup removal

MCPTT group ID

M

MCPTT group ID of the regroup group

Result

M

Result of the regroup removal operation

10.3.2.18 IWF pre-configured regroup reject (IWF – MCPTT server, MCPTT server – IWF)

Table 10.3.2.18-1 describes the information flow IWF pre-configured regroup reject from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.18-1 IWF pre-configured regroup reject information elements

Information Element

Status

Description

MCPTT group ID

M

MCPTT group ID of the regroup group

Reject reason

M

Reason for rejecting the regrouping operation