Patent ID: 7969912

Claim:
A method for managing power in a first device in a wireless network, the method comprising: transmitting a first request message to a coordinator to request a change of a power management mode from a normal mode to a power saving mode; starting a timer of the first device for determining whether a first response to the first request message is received within a predetermined time period; receiving the first response to the first request message indicating approval of the first request message; receiving a first beacon including power management mode change information after receiving the first response; changing the power management mode from the normal mode to the power saving mode in accordance with the power management mode change information; receiving a second beacon comprising information indicating that the first device needs to change the power management mode from the power save mode to the normal mode; transmitting a second request message to the coordinator to request a change of the power management mode from the power saving mode to the normal mode after receiving the second beacon; receiving a second response to the second request message indicating approval of the second request message; and changing the power management mode from the power saving mode to the normal mode; receiving a third beacon comprising information indicating that the first device is in the normal mode.