Power saving in wireless network entities

• US 8,923,180 B2
• Filed: 01/23/2013
• Issued: 12/30/2014
• Est. Priority Date: 01/23/2013
• Status: Active Grant

• Current Assignee: Taiwan Semiconductor Manufacturing Company Limited
• Original Assignee: Conversant Intellectual Property Management Inc (MOSAID Technologies Inc. (f/k/a Conversant Intellectual Property Management))
• Inventors: Ahmadvand, Nima, Lu, Xuejun, Hu, Hanwu, Sylla, Mouhamadou Lamine
• Primary Examiner(s): Qureshi, Afsar M
• Application Number:
  US13/747,802
• Publication Number:
  US 20140204814A1
• Time in Patent Office: 706 Days
• Field of Search: 370311-478
• US Class Current: 370/311
• CPC Class Codes: H04W 52/02 Power saving arrangements in wired systems H04L12/12; signaling of mobile application services, e.g. low battery notifications H04W4/20
• CPC Class Codes: H04W 52/0206 in access points, e.g. base stations access point devices per se H04W88/08
• CPC Class Codes: H04W 52/0219 where the power saving management affects multiple terminals
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Power saving in wireless networks is disclosed. A wireless network entity that includes a module to enable a reduction in power consumption in that wireless network entity is also disclosed. The module is configured to determine that a selected wireless station of one or more wireless stations associated with the wireless network entity in a same wireless network will transmit system control information (including synchronization information and service identification information) that is normally transmitted by the wireless network entity.

Claims

1. A method carried out by a wireless access point, the method comprising:

notifying a plurality of wireless stations in a basic service set of the wireless access point that a selected one of the plurality of wireless stations will become a delegate for transmitting beacons normally transmitted by the wireless access point;

notifying the selected one of the plurality of wireless stations that the selected one of the plurality of wireless stations is to begin transmitting the beacons normally transmitted by the wireless access point; and

discontinuing, after the notifying of the plurality of wireless station and the notifying of the selected one of the plurality of wireless stations, normal beacon transmission.

2. The method as claimed in claim 1 wherein the notifying of the plurality of wireless stations includes wirelessly transmitting a leave notice that includes information identifying the selected one of the plurality of network stations.

3. The method as claimed in claim 2 wherein the leave notice includes start time information and duration of absence information of the wireless access point to be absent from a network that includes the basic service set.

4. The method as claimed in claim 1 wherein the notifying of the plurality of wireless stations includes wirelessly transmitting a leave notice.

5. The method as claimed in claim 4 wherein the notifying of the selected one of the plurality of wireless stations includes wirelessly transmitting information identifying the selected one of the plurality of wireless stations as a delegated beacon transmitting station, the transmitting of the information carried out at a different time than the transmitting of the leave notice.

6. The method as claimed in claim 4 wherein the leave notice includes start time information and duration of absence information of the wireless access point to be absent from a network that includes the basic service set.

7. The method as claimed in claim 1 wherein the wireless access point is a IEEE802.11 standard compliant router.

8. The method as claimed in claim 1 wherein the beacons comprise beacon frames.

9. The method as claimed in claim 1 wherein the normal beacon transmission is a periodic beacon transmission.

10. The method as claimed in claim 1 further comprising carrying out maintenance, fault recovery, re-configuration or software upgrading within the wireless access point, the carrying out occurring after the discontinuing of the normal beacon transmission.

11. The method as claimed in claim 1 wherein a selection of the selected one of the plurality of wireless stations is based on transmit power information received by the wireless access point from each of the plurality of wireless stations.

12. The method as claimed in claim 1 wherein a selection of the selected one of the plurality of wireless stations is based on a plurality of measurement reports that include Receive Power Indication histogram reports, each of the plurality of measurement reports received from a respective one of the wireless stations.

13. A method carried out by a wireless network entity, the method comprising:

determining that a selected wireless station of one or more wireless stations in a same wireless network as the wireless network entity will transmit system control information that is normally transmitted by the wireless network entity, including synchronization information and system information necessary for wireless stations to initiate access to the wireless network;

notifying the one or more wireless stations in the wireless network that the wireless network entity will be absent from the wireless network for a defined period of time; and

discontinuing, after the determining and the notifying, system control information transmission by the wireless network entity.

14. The method as claimed in claim 13 wherein the notifying includes wirelessly transmitting a leaving notice.

15. The method as claimed in claim 14 wherein the leaving notice includes start time information and duration of absence information of the wireless network entity to be absent from the wireless network.

16. The method as claimed in claim 15 wherein the leaving notice further includes information indicating duration remaining for absence of the wireless network entity.

17. The method as claimed in claim 14 wherein the leaving notice includes information identifying the selected wireless station.

18. The method as claimed in claim 13 wherein the determining includes notifying the selected wireless station that the selected wireless station is to begin transmitting the system control information normally transmitted by the wireless network entity.

19. The method as claimed in claim 18 wherein the determining further includes selecting the selected wireless station that is to begin transmitting the system control information normally transmitted by the wireless network entity.

20. The method as claimed in claim 18 wherein the selecting the selected wireless station includes selecting the selected wireless station:

i) on a random basis;

ii) according to some predetermined criteria, such as power level;

or iii) according to default configurations.

21. The method as claimed in claim 13 wherein the wireless network entity is a wireless access point in a wireless LAN network.

22. The method as claimed in claim 21 wherein the wireless access point is an IEEE 802.11 standard complaint router.

23. The method as claimed in claim 13 wherein the wireless network entity is a base station in a mobile network.

24. The method as claimed in claim 13 wherein the one or more wireless stations are stations in a wireless LAN network.

25. The method as claimed in claim 24 wherein the stations in the wireless LAN network are IEEE 802.11 standard complaint stations.

26. The method as claimed in claim 13 wherein the one or more wireless stations are mobile stations in a mobile network.

27. A wireless network entity comprising:

an antenna to receive and conduct wireless signals;

a Radio Frequency (RF) module communicatively coupled to the antenna, the RF module configured to enable communication of the wireless signals within a wireless network to which the wireless network entity belongs;

a processor communicatively coupled to the RF module; and

a module associated with the processor, the module configured to;

i) determine that a selected wireless station of one or more wireless stations associated with the wireless network entity in the wireless network will transmit system control information that is normally transmitted by the wireless network entity, including synchronization information and service identification information;

ii) generate a notification to be communicated to the one or more wireless stations in the wireless network that the wireless network entity will be absent from the wireless network for a defined period of time; and

iii) cause a discontinuation, subsequent to the notification, of system control information transmission by the wireless network entity.

28. The wireless network entity as claimed in claim 27 wherein the RF module is further configured to wirelessly transmit the notification.

29. The wireless network entity as claimed in claim 27 wherein the notification includes start time information and duration of absence information of the wireless network entity to be absent from the wireless network.

30. The wireless network entity as claimed in claim 27 wherein the notification includes information identifying the selected wireless station.

31. The wireless network entity as claimed in claim 27 wherein the module is further configured to select the selected wireless station that is to begin transmitting the system control information normally transmitted by the wireless network entity.

32. A wireless network comprising:

a plurality of wireless stations that includes at least a first wireless station and a second wireless station, the first wireless station configured to transmit system control information, including synchronization information and service identification information, to at least the second wireless station, during a defined period of time;

a wireless network entity including;

an antenna to receive and conduct wireless signals;

a Radio Frequency (RF) module communicatively coupled to the antenna, the RF module configured to enable communication of the wireless signals within the wireless network;

a processor communicatively coupled to the RF module; and

a module associated with the processor, the module configured to;

i) determine that the first wireless station in the wireless network will transmit the system control information that is normally transmitted by the wireless network entity;

ii) generate a notification to be communicated to at least the first and second wireless stations that the wireless network entity will be absent from the wireless network for the defined period of time; and

iii) cause a discontinuation, subsequent to the notification, of system control information transmission by the wireless network entity.