Patent ID: 7711782

Claim:
An event notification method in a wireless communications system, the method comprising: sending from a client to a server an event notification request message including period information set by a user about an event notification message of a corresponding specific event; and sending the event notification message from the server to notify the client of the generation of the corresponding specific event when the server determines that the corresponding specific event was generated at a point of time that satisfies the period information, wherein the server determining that the corresponding specific event was generated comprises determining whether an effective time period during which the corresponding specific event can be generated expires and terminating every operation with respect to the corresponding specific event when the effective time period expires, wherein the period information is arbitrarily set by the user of the client, is a minimum time interval or a permitted time range within which the client receives the event notification message, and corresponds to a period of time between successive event notification messages, wherein the server notifies the client at the end of the period of time when the corresponding specific event has been generated since a previously sent event notification message, wherein the server allows one event notification message to be sent to the client when a plurality of corresponding specific events has been generated since the previously sent event notification message, wherein the server holds the event notification message until the period information is satisfied before sending the held event notification message to the client, and wherein the server monitors whether an existing event notification message is being held at the server when the specific event has not been generated.