Patent ID: 8891454

Claim:
A method for sending messages, comprising: acquiring a destination region to which an outgoing message is to be sent; determining a first base station identifier corresponding to the destination region, and acquiring a first unique user identifier corresponding to the first base station identifier; sending the outgoing message to a mobile terminal of a first user, wherein the first user is a user identified by the first unique user identifier; receiving at least one second unique user identifier and at least one second base station identifier, wherein the second base station identifier is used to identify a base station currently providing services for a mobile terminal of a second user, wherein the second user is a user identified by the second unique user identifier; querying a locally stored mapping relationship between base station identifiers and unique user identifiers, and if there is a third base station identifier corresponding to the second unique user identifier, judging whether the second base station identifier is the same as the third base station identifier; if the same, ending the process; and if different, deleting a mapping relationship between the second unique user identifier and the third base station identifier, and establishing a mapping relationship between the second unique user identifier and the second base station identifier; if there is no base station identifier corresponding to the second unique user identifier, establishing and storing a mapping relationship between the second unique user identifier and the second base station identifier; and establishing and storing a second base station serving range corresponding to the second base station identifier.