METHOD FOR MANAGING THE POWER IN THE WIRELESS NETWORK

• US 20110051638A1
• Filed: 10/11/2007
• Published: 03/03/2011
• Est. Priority Date: 10/13/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Taek Soo, Cho, Hyeon Cheol, Jeon, Beom Jin
• Granted Patent: US 7,969,912 B2
• Time in Patent Office: Days
• US Class Current: 370/311
• CPC Class Codes: H04L 12/12 Arrangements for remote connection or disconnection of substations or of equipment thereof
• CPC Class Codes: H04L 12/403 with centralised control, e.g. polling
• CPC Class Codes: H04L 12/417 with deterministic access, e.g. token passing
• CPC Class Codes: H04L 2012/2841 Wireless
• CPC Class Codes: H04L 2012/2849 Audio/video appliances
• CPC Class Codes: H04W 52/0235 where the received signal is a power saving command
• CPC Class Codes: H04W 68/02 Arrangements for increasing efficiency of notification or paging channel
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Disclosed are methods for managing a power in a wireless network communication. One of the methods provides checking whether information on a request for a mode change is received for a prescribed channel time in a manner that a device configuring a network enters a power save mode in the course of not performing data transmission/reception and that a modem enters an awake state from a sleep state for the prescribed channel time. And, the prescribed channel time is determined to correspond to a time for transmitting a beacon. According to a preferred embodiment, a 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 does not exist, a sleep state is reentered. If the power management mode change (PMMC) information is received, a power is managed by performing data transmission/reception in a manner of switching to a normal mode.

Claims

1. A method for managing a power in a wireless network including a coordinator and at least one device, the method comprising:

receiving a first beacon including power management mode change information from the coordinator in a first device in a power save mode; and

changing a power management mode in accordance with the power management mode change information.

2. The method of claim 1, wherein the power management mode change information instructs the power management mode to be changed into a normal mode and,

wherein in the step of changing the power management mode, the power management mode is changed from the power save mode to the normal mode possible for data transmission and reception.

3. The method of claim 1, further comprising:

receiving a second beacon from the coordinator wherein the second beacon includes information indicating that the power management mode of the first device has been changed.

4. The method of claim 1, wherein the power management mode includes a normal mode and the power save mode.

5. The method of claim 4, wherein the power save mode includes an awake state and a sleep state and wherein a data transmission/reception is activated in the awake state and inactivated in the sleep state.

6. The method of claim 1, wherein the first device in the power save mode is in an awake state for every beacon at least.

7. The method of claim 1, further comprising:

sending a power management mode change request message from the first device to the coordinator; and

receiving a power management mode change response message in the first device in response to the power management mode change request message.

8. A method for managing a power in a second device attempting to perform communication with a first device in a power save mode in a wireless network including a coordinator and at least one device, the method comprising:

sending a power management mode change request message associated with the first device from the second device to the coordinator; and

receiving a first beacon including power management mode change information for the first device from the coordinator.

9. The method of claim 8, further comprising:

receiving a second beacon from the coordinator wherein the second beacon includes information indicating that the power management mode of the first device has been changed according to the power management mode change information.

10. The method of claim 8, after receiving the first beacon, the method further comprising:

sending a power management mode change request message from the first device to the coordinator; and

receiving a power management mode change response message in the first device in response to the power management mode change request message.

11. A method for managing a power by a coordinator in a wireless network including the coordinator and at least one device, the method comprising:

receiving a power management mode change request message associated with a first device; and

broadcasting a beacon including power management mode change information for the first device.

12. The method of claim 11, wherein the power management mode change request message associated with the first device is received from at least one of the first device and a second device.

13. The method of claim 11, wherein the power management mode includes a normal mode and a power save mode.

14. The method of claim 13, wherein the power save mode includes an awake state and a sleep state and wherein a data transmission/reception is activated in the awake state and inactivated in the sleep state.

15. The method of claim 14, wherein the first device in the power save mode is in an awake state for every beacon at least.

16. The method of claim 13, wherein the power save mode of the first device is changed from the power save mode to the normal mode after receiving the beacon including the power management mode change information in the first device.