QOS SCEDULING METHODS FOR WLANS WITH HETEROGENOUS APPLICATIONS

• US 20100039973A1
• Filed: 12/04/2007
• Published: 02/18/2010
• Est. Priority Date: 12/18/2006
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Cavalcanti, Dave, Schmitt, Ruediger
• Granted Patent: US 8,169,941 B2
• Time in Patent Office: Days
• US Class Current: 370/311
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A wireless system (100) includes at least one power-save wireless station (PS STA)(102). A method of wireless includes allocating deterministic time intervals (206,207) to the PS-STAs.

Claims

8-1. A wireless system as claimed in claim 2, wherein the AP maintains a list of each of the at least one PS STAs in the system.

9-2. A wireless system as claimed in claim 2, wherein the AP maintains a list of STAs, which are not PS STAs in the system.

10. A method of wireless communication, the method comprising:

scheduling a power save transmission opportunity (PS-TXOP) in a power save (PS) period after a termination of a beacon transmission period (BT) and before other transmission opportunities (TXOPs).

11. A method as claimed in claim 10, further comprising transmitting data from a PS STA to another STA during an assigned PS-TXOP, wherein, after the transmitting, the PS-STA enters a sleep mode.

12. A method as claimed in claim 10, further comprising transmitting data from a PS-STA to another STA during an assigned PS-TXOP, wherein, after the transmitting, but before an end of the PS-TXOP, allocating a remaining portion of the PS-TXOP to another STA.

13. A method as claimed in claim 12, wherein the STA is an access point (AP) and the another STA is not a PS STA.

14. A method as claimed in claim 12, wherein the another STA is not a PS STA.

15. A method as claimed in claim 12, wherein the another STA is a real time multimedia (RT) STA.

16. A method as claimed in claim 10, further comprising, before the scheduling, maintaining a list of a power save (PS) STA.

17. A method as claimed in claim 10, further comprising, before the scheduling, maintaining a list of a STAs, which are not (PS) STAs.

18. A method as claimed in claim 10, further comprising:

scheduling consecutive PS-TXOPs for a PS STA at deterministic start times.

19. A method as claimed in claim 10, wherein the consecutive PS-TXOPs are granted to the same PS STA at deterministic start times in consecutive power save (PS) communication periods.

20. A method as claimed in claim 10, further comprising transmitting data from the AP or other STA to the PS STA within the PS-TXOP, and after receiving an acknowledgement (ACK) from the PS STA, the AP or other STA allocates a remaining portion of the PS-TXOP to another STA.