Method for managing the power in the wireless network
First Claim
1. 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.
1 Assignment
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Accused Products
Abstract
A method is provided for checking whether information on a request for a mode change is received for a prescribed channel time such that a device configuring a network enters a power save mode when not performing data transmission/reception and a modem enters an awake state from a sleep state for the prescribed channel time. The prescribed channel time is determined to correspond to a time for transmitting a beacon. The modem of a device in a power save mode enters an awake state for a channel time period for broadcasting a beacon and then checks whether information on a power management mode change is received. If the information is not received, a sleep state is reentered. If the power management mode change information is received, power is managed by performing data transmission/reception by switching to a normal mode.
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Citations
13 Claims
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1. A method for managing power in a first device in a wireless network, the method comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A device for use in a wireless network, comprising:
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a communication module configured for 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; a timer configured for being started to determine whether a first response to the first request message is received within a predetermined time period; wherein the communication module is further configured for; 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 such that the power management mode is changed 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 device needs to change the power management mode from the power save mode to the normal mode such that the power management mode is changed from the power saving 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 receiving a third beacon comprising information indicating that the device is in the normal mode. - View Dependent Claims (10, 11, 12, 13)
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Specification