Mobile communications system, base station, and mobile terminal for distributing emergency messages

摘要

A mobile communications system including a mobile terminal 1 and a base station 2 which relays communications between a network and the mobile terminal 1, in which the base station 2 can deliver information to the mobile terminal 1 by using an MBMS, in which the base station 2 sets a flag indicating presence or absence of emergency information to a control channel used for the MBMS, and notifies the presence or absence of the emergency information to the mobile terminal 1 by using the description of the flag set to the control channel for the MBMS.

主权项

1. A mobile communications system
comprising: a plurality of mobile terminals; and a base station configured to transmit emergency information to the plurality of mobile terminals, wherein the base station transmits an emergency information indicator showing presence of the emergency information to a plurality of mobile terminals including a mobile terminal in an idle state and a mobile terminal receiving individual data by using first and second paging messages, and wherein the emergency information indicator is at least one bit of a multimedia broadcast multicast service indicator channel, the base station transmits required information that is required for the plurality of mobile terminals to receive the emergency information, the required information including an emergency information channel number, the emergency information channel number corresponding to a channel through which the plurality of mobile terminals are to receive the emergency information, and the base station transmits the emergency information to the plurality of mobile terminals according to the required information that is required for the plurality of mobile terminals to receive the emergency information; wherein the mobile terminal in the idle state receives the emergency information indicator showing presence of the emergency information, transmitted from the base station in the first paging message, the mobile terminal in the idle state receives the required information that is required for the plurality of mobile terminals to receive the emergency information transmitted from the base station, and the mobile terminal in the idle state starts receiving the emergency information transmitted from the base station according to the required information that is required for the plurality of mobile terminals to receive the emergency information after receiving the emergency information indicator; and wherein the mobile terminal receiving individual data receives the emergency information indicator showing presence of the emergency information, transmitted from the base station in the second paging message, the mobile terminal receiving individual data receives the required information that is required for the plurality of mobile terminals to receive the emergency information transmitted from the base station, the mobile terminal receiving individual data starts receiving the emergency information transmitted from the base station according to the required information that is required for the plurality of mobile terminals to receive the emergency information after receiving the emergency information indicator, and a channel through which the emergency information indicator is transmitted is different from a channel through which the required information that is required for the plurality of mobile terminals to receive the emergency information is transmitted, and the emergency information is transmitted through a multimedia broadcast multicast service.