A method for implementing the application for speaking right of a Long Term Evolution (LTE)-based broadband trunking system, a Mobility Management Entity (MME), a network subsystem, a broadband wireless access subsystem and the LTE-based broadband trunking system are disclosed. The method includes: the broadband wireless access subsystem sending a trunking speaking right update request to the network subsystem, receiving the trunking speaking right update accept message returned by the network subsystem, and sending the trunking speaking right update accept message to a speaking right seizing terminal; and the broadband wireless access subsystem receiving the speaking right occupation prompt message sent by the network subsystem, and sending the trunking speaking right occupation prompt message and updated configuration information via a multicast control channel of an enhanced Multimedia Broadcast Multicast Service (eMBMS).