Patent ID: 9693209
Date: 2017-06-27
CPC Classifications: H04W

Claim:
1. A warning system for earthquakes, tsunamis and commercial mobile alerts, comprising: a core network comprising a mobility management entity, a cell broadcast center and a cell broadcast service; at least one mobile station comprising a mobile station control unit and a mobile station wireless communication unit having a first frequency band and a second frequency band; and a base station, station comprising a base station control unit and a base station wireless communication unit having a segment division unit, the first frequency band and the second frequency band, and the base station communicates with the mobility management entity via an interface, wherein the base station wireless communication unit periodically transmits an alert to the at least one mobile station using the first frequency band, the alert including a flag requiring the at least one mobile station to request transmission of the alert via the second frequency band when decoding of the alert does not succeed in the at least one mobile station, the base station wireless communication unit receiving, from the mobile station, alert reception information, the base station wireless communication unit transmitting the alert to the at least one mobile station using the second frequency band; and the control unit of the base station instructs the base station wireless communication unit, in response to the alert reception information, to transmit the alert to the at least one mobile station using the second frequency band.