Figure 10.5.7-1 shows the procedure for floor control on an interworking group defined in the LMR system where local filtering is not performed by the MCPTT server. Simultaneous floor requests are included to show various aspects of interworking floor control.
Pre-conditions:
The interworking group is defined in the LMR system.
The MCPTT system is configured to send competing floor control requests to the LMR system (represented by the IWF) for floor control arbitration.
MCPTT client 1, MCPTT client 2, and LMR users are affiliated to that group.
An interworking group call is ongoing involving MCPTT users and LMR users. The floor is currently idle.
Since the group is defined in the LMR system the MCPTT floor control server forwards these floor requests to the IWF for final floor control determination. The IWF performs floor arbitration in conjunction with the LMR system (not shown). The IWF determines that the floor can be granted to MCPTT client 1.
The IWF sends an IWF floor granted message for MCPTT client 1, an IWF floor rejected message for MCPTT client 2, and an IWF floor taken message for MCPTT client 2 to the MCPTT floor control server.
Figure 10.5.8-1 shows the procedure for floor control on an interworking group defined in the MCPTT system where local filtering is not performed by the LMR system. Simultaneous floor requests are included to show various aspects of interworking floor control.
Pre-conditions:
The interworking group is defined in the MCPTT system.
MCPTT client 1, MCPTT client 2, and LMR users are affiliated to that group.
The LMR system (represented by the IWF) is configured to send all competing floor control requests to the MCPTT system for floor control arbitration.
The IWF is not affiliating on behalf of LMR users. All LMR group affiliations are passed through the IWF to the MCPTT server.
An interworking group call is ongoing involving MCPTT users and LMR users. The floor is currently idle.
The user of MCPTT client 1 wants to send voice media over the session. At the same time multiple users in the LMR system (represented by the IWF) want to also send voice media over the session.
The IWF sends floor request messages to the MCPTT floor control server for each LMR user requesting the floor. In this case two LMR users are requesting the floor. These floor requests contain the MCPTT ID of the LMR user (converted by the IWF).
Since the group is defined in the MCPTT system the MCPTT floor control server performs final floor control determination. In this case the MCPTT floor control server determines to accept the floor request from MCPTT client 1 based on local policy and arbitration results (e.g., according to priority of the request versus the competing requests from the IWF).
The IWF is notified that its floor requests were rejected. The MCPTT floor control server sends an IWF floor rejected message to the IWF for each floor request.
The MCPTT floor control server sends floor taken messages to MCPTT client 2 and the IWF to inform them of who is granted the floor. In this case a floor taken message is sent to the IWF corresponding to each affiliated LMR user.
Figure 10.5.9-1 shows a procedure for a private call with floor control where the LMR system controls the floor. A request for transmission by the MCPTT user while the LMR user has the floor is rejected by the IWF, to show various aspects of interworking floor control.
Pre-conditions:
A private call has been set up between an LMR user and MCPTT client 1.
The LMR system is controlling the floor, via the IWF.
Figure 10.5.10-1 shows a procedure for a private call with floor control where the MCPTT system controls the floor. A request for transmission by the LMR user while the MCPTT user has the floor is accepted by the MCPTT server, to show various aspects of interworking floor control.
Pre-conditions:
A private call has been set up between the LMR user and MCPTT client 1.