Method, Apparatus, and System for Floor Control on Multiple MCPTT Systems

A method for floor control on multiple mission critical push to talk (MCPTT) systems, the method comprising:

• receiving, by a first network element device, a floor request message from K user equipment (UEs), wherein K is an integer greater than or equal to 1, wherein the first network element device belongs to a first MCPTT system, wherein K MCPTT users are associated with the K UEs respectively, and wherein MCPTT groups to which the K MCPTT users belong respectively, belong to the first MCPTT system;
• sending, by the first network element device, a first message to a first floor control server according to the floor request message, wherein the first message is used to request floor from the first floor control server;
• receiving, by the first network element device, a second message from the first floor control server, wherein the second message is used to indicate that an MCPTT user in an MCPTT group belonging to the first MCPTT system occupies the floor;
• determining, by the first network element device according to the second message, that a first MCPTT user occupies the floor, wherein the first MCPTT user is a user in the K MCPTT users and is an associated user of first UE, and wherein the first UE is an UE in the K UEs;
• and
• sending, by the first network element device, a floor response message to the first UE, wherein the floor response message is used to indicate that the first MCPTT user occupies the floor.

An apparatus for floor control on multiple mission critical push to talk (MCPTT) systems, wherein the apparatus is a first floor control server, the apparatus comprising:

• a receiver configured to receive a first message sent by N network element devices, wherein the first message is used to request a floor from the first floor control server, wherein N is an integer greater than or equal to 1, and wherein the N network element devices respectively belong to N MCPTT systems;
• a processor configured to determine, according to the first message and a floor control policy, that an MCPTT user in an MCPTT group belonging to a first MCPTT system occupies the floor, wherein the first MCPTT system is an MCPTT system to which a first network element device belongs, and wherein the first network element device is a network element device in the N network element devices;
• and
• a transmitter configured to send a second message to the first network element device, wherein the second message is used to indicate that the MCPTT user in the MCPTT group belonging to the first MCPTT system occupies the floor.

An apparatus for floor control on multiple mission critical push to talk (MCPTT) systems, wherein the apparatus is a first network element device, the apparatus comprising:

• a receiver configured to receive a floor request message from K user equipment (UEs), wherein K is an integer greater than or equal to 1, wherein the first network element device belongs to a first MCPTT system, wherein K MCPTT users are respectively associated with the K UEs, and wherein MCPTT groups to which the K MCPTT users respectively belong, belong to the first MCPTT system;
• a transmitter configured to send a first message to a first floor control server according to the floor request message, wherein the first message is used to request floor from the first floor control server, wherein the receiver is configured to receive a second message from the first floor control server, wherein the second message is used to indicate that an MCPT user in an MCPTT group belonging to the first MCPTT system occupies the floor;
• and
• a processor configured to determine, according to the second message, that a first MCPTT user occupies the floor, wherein the first MCPTT user is a user in the K MCPTT users and is an associated user of first UE, and the first UE is UE in the K UEs,
• wherein the transmitter is configured to send a floor response message to the first UE, wherein the floor response message is used to indicate that the first MCPTT user occupies the floor.