Abstract: Methods and systems for determining the duration of a rapid on/off state include: when a micro-cell base station is a single sub frame-level on/off micro-cell base station, determining in real-time the on/off state of the micro-cell base station in order to determine the duration of the state of the micro-cell base station; and when the micro-cell base station is a multiple sub frame-level on/off micro-cell base station, by means or receiving a notification message sent by the micro-cell base station or a macro-cell base station, determining the duration of the state of the micro-cell base station.

Abstract: Provided is a communication system applied to a terminal, the communication system includes: a first communication module; a second communication module; a first determination unit configured to determine whether the terminal currently supports circuit switched fallback based on a real-time state of the terminal; and a processing unit configured to establish a connection between the first communication module and a first network in a case that the first determination unit determines that the terminal currently supports the circuit switched fallback, or establish a connection between the second communication module and a second network in a case that the first determination unit determines that the terminal does not currently support the circuit switched fallback. Accordingly, further provided are a terminal and a communication method.

Abstract: Provided is a quick transmission point handover method, including: a service base station detects whether a current transmission point in use needs to be closed; if the service base station detects that the current transmission point in use needs to be closed, transmitting a target transmission point directive command to a terminal to inform the terminal about information of a new target transmission point to be monitored soon and/or to inform the terminal that the current transmission point in use will be closed. Correspondingly, also provided is a quick transmission point handover device.