10.5.1 General

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

Floor control for interworking applies to both private call and group call.

Floor control involving a single MCPTT server is described in 3GPP TS 23.379 [7]. Floor control involving multiple MCPTT servers is also described in 3GPP TS 23.379 [7] in that a primary MCPTT server is interconnected to a partner MCPTT server. Subclause 10.5.2 describes information flows for floor control between an MCPTT server and an IWF, and are based on those defined interconnection in 3GPP TS 23.379 [7]. Subclause 10.5.3 describes aspects of floor control that apply to interworking groups and interworking private calls. Subclauses 10.5.4/10.5.6 and 10.5.5/10.5.7 describe general cases of floor control on an interworking group defined in the LMR system and in the MCPTT system respectively, where the partner system has been configured to apply/not apply local filtering of floor control requests before communicating with the primary system. Subclauses 10.5.9 and 10.5.10 describe general cases of floor control in a private call, where the controlling role is taken by the LMR system and the MCPTT system respectively.