Adjustment of parameters based upon battery status

• US 7,933,635 B2
• Filed: 12/11/2006
• Issued: 04/26/2011
• Est. Priority Date: 03/09/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Oh, Jang Geun, Lee, Jin Suk
• Primary Examiner(s): Hu; Jinsong
• Assistant Examiner(s): Shen; Qun
• Application Number:
  US11/609,157
• Publication Number:
  US 20070213101A1
• Time in Patent Office: 1,597 Days
• Field of Search: 370/311, 455573-574, 4553431-3436
• US Class Current: 455/574
• CPC Class Codes: H04W 28/14 using intermediate storage
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 52/0277 according to available power supply, e.g. switching off when a low battery condition is detected
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

In a wireless local area network, a battery status of a mobile device is determined, battery status data based upon the battery status is generated, and a listen interval between a mobile device and an access point is adjusted based upon the battery status. Listen interval data is generated based upon the listen interval, an association request frame is wirelessly transmitted from the mobile device to the access point during the listen interval. The association request frame includes the battery status data and/or the listen interval data.

Claims

1. A method comprising:

determining a remaining battery power of a mobile device;

generating battery status data based upon the determined remaining battery power;

adjusting a listen interval between the mobile device and an access point of a wireless network based upon the remaining battery power;

generating listen interval data based upon the adjusted listen interval;

wirelessly transmitting an association request frame from the mobile device to the access point, the association request frame including the battery status data or the listen interval data;

receiving the association request frame at the access point;

adjusting, at the access point, a size of a buffer memory associated with the mobile device, wherein the size of the buffer memory is always increased when the battery status data is less than a first threshold or the listen interval data is greater than a second threshold, and the size of the buffer memory is maintained when the battery status data is greater than the first threshold or the listen interval data is less than the second threshold; and

wirelessly transmitting an association response frame from the access point to the mobile device.

2. The method of claim 1, wherein when the remaining battery power is above 70% of maximum battery power the size of the buffer memory is expressed as size S, when the remaining battery power is at 40% to 70% of maximum battery power the size of the buffer memory is expressed as size 2S, and when the remaining battery power is under 40% of maximum battery power the size of the buffer memory is expressed as size 3S.

3. The method of claim 1, wherein the association request frame further comprises capability data, service set identification (“

SSID”

) data, or supported rate data.

4. The method of claim 1, wherein the battery status data is a generated as a binary number.

5. The method of claim 1, wherein the association response frame further comprises capability data, status code data, an association identification (“

AID”

), supported rate data, or an indication of a size of a buffer memory at the access point.

6. The method of claim 1, further comprising:

storing data intended for the mobile device in the adjusted buffer memory; and

wirelessly transmitting the data stored in the adjusted buffer memory to the mobile device.

7. The method of claim 1, wherein when the remaining battery power is above a predetermined battery power the size of the buffer memory is deceased, and wherein when the remaining battery power is under a predetermined battery power the size of the buffer memory is increased.

8. A system comprising:

a mobile device, further comprising;

a battery,

a controller configured to determine a remaining battery power of the battery, to generate battery status data based upon the determined remaining battery power, to adjust a listen interval based upon the remaining battery power, and to generate listen interval data based upon the adjusted listen interval, and

a transceiver configured to wirelessly transmit an association request frame, the association request frame including the battery status data or the listen interval data, and to wirelessly receive an association response frame, the association response frame further comprising data, the size of the data based upon the battery status data and/or the listen interval data; and

an access point device, further comprising;

a transceiver configured to wirelessly receive the association request frame from a mobile device, and to wirelessly transmit the association response frame to the mobile device, the association response frame further comprising data stored in a buffer memory,

a controller configured to adjust, at the access point, a size of the buffer memory, wherein the size of the buffer memory is always increased when the battery status data is less than a first threshold or the listen interval data is greater than a second threshold, and the size of the buffer memory is maintained when the battery status data is greater than the first threshold or the listen interval data is less than the second threshold, and

a memory medium configured to store the data in the buffer memory.

9. The method of claim 8, wherein when the remaining battery power is above a predetermined battery power the size of the buffer memory is deceased, and wherein when the remaining battery power is under a predetermined battery power the size of the buffer memory is increased.

10. A system comprising:

one or more computers; and

a memory medium coupled to the one or more computers having instructions stored thereon which, when executed by the one or more computers, cause the one or more computers to perform operations comprising;

determining a remaining battery power of a mobile device,

generating battery status data based upon the determined remaining battery power,

adjusting a listen interval between the mobile device and an access point of a wireless network based upon the remaining battery power,

generating listen interval data based upon the adjusted listen interval,

wirelessly transmitting an association request frame from the mobile device to the access point, the association request frame including the battery status data or the listen interval data,

receiving the association request frame at the access point,

adjusting, at the access point, a size of a buffer memory associated with the mobile device, wherein the size of the buffer memory is always increased when the battery status data is less than a first threshold or the listen interval data is greater than a second threshold, and the size of the buffer memory is maintained when the battery status data is greater than the first threshold or the listen interval data is less than the second threshold, and

wirelessly transmitting an association response frame from the access point to the mobile device.

11. The system of claim 10, wherein when the remaining battery power is above 70% of maximum battery power the size of the buffer memory is expressed as size S, when the remaining battery power is at 40% to 70% of maximum battery power the size of the buffer memory is expressed as size 2S, and when the remaining battery power is under 40% of maximum battery power the size of the buffer memory is expressed as size 3S.

12. The method of claim 10, wherein the association response frame further comprises capability data, status code data, an association identification (“

AID”

), supported rate data, or an indication of a size of a buffer memory at the access point.

13. The method of claim 10, wherein when the remaining battery power is above a predetermined battery power the size of the buffer memory is deceased, and wherein when the remaining battery power is under a predetermined battery power the size of the buffer memory is increased.