A mobile station (MS) operating in sleep or idle mode of a wireless access system conventionally acts to confirm that sleep or idle mode may be maintained by continually receiving broadcast messages from a base station (BS), such as a traffic indicating message and a paging advertising message, and decoding the received messages to confirm MS status.
Since the traffic indicating message and the paging advertising message include information related to all nearby mobile stations in sleep or idle mode, the messages may be very long. Thus, the mobile station may consume much power to decode the messages.
For most mobile stations, the time required for transmission/reception of data may be shorter than a standby time for receiving data. Therefore, a mobile station in sleep mode typically receives a traffic indicating message to continue the sleep mode (e.g., Negative Indication). Furthermore, a mobile station in the idle mode typically receives a paging advertising message to continue idle mode (e.g., No Action Required). The sleep mode and idle mode control the mobile station via broadcasting, e.g., the traffic indicating message and the paging advertising message, respectively.
However, when the mobile station in sleep or idle mode unnecessarily decodes a message, power is unnecessarily consumed by the mobile station.