Apparatus and method for providing QoS service schedule and bandwidth allocation to a wireless station

• US 7,519,032 B2
• Filed: 12/09/2002
• Issued: 04/14/2009
• Est. Priority Date: 09/04/2002
• 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: Challapali, Kiran, Soomro, Amjad, Del Prado Pavon, Javier, Nandagopalan, Saishankar
• Primary Examiner(s): Milord; Marceau
• Application Number:
  US10/314,576
• Publication Number:
  US 20040042435A1
• Time in Patent Office: 2,318 Days
• Field of Search: 370/338, 370/311, 370/329, 370/346, 370/349, 370/445, 370/447, 370/449, 370/465, 370/395.21, 370/332, 455/452.2
• US Class Current: 370/338
• 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 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

An apparatus and method is disclosed for providing a Quality of Service (QoS) service schedule and bandwidth allocation message to a wireless station in a wireless network. The apparatus of the invention comprises a hybrid coordinator that is capable of (1) creating a Quality of Service (QoS) service schedule and a bandwidth allocation message for a wireless station and (2) sending the QoS service schedule and the bandwidth allocation message to the wireless station. The wireless station is capable of using the scheduling information to perform power management by entering a power save mode during times when the hybrid coordinator has not scheduled any transmission opportunities.

Claims

1. A method for providing a Quality of Service (QoS) service schedule to a wireless station in a wireless network comprising acts of:

creating in a hybrid coordinator of said wireless network a Quality of Service (QoS) service schedule for said wireless station;

sending said QoS service schedule from said hybrid coordinator to said wireless station;

receiving said QoS service schedule in said wireless station;

determining from said QoS service schedule a scheduled time of a transmission opportunity for said wireless station;

placing said wireless station in a power save mode of operation until said scheduled time of said transmission opportunity;

removing said wireless station from said power save mode of operation before said scheduled time of said transmission opportunity; and

operating said wireless station to send or receive data during said transmission opportunity.

2. The method as claimed in claim 1 further comprising

an act of updating a previous QoS service schedule in said wireless station with said QoS service schedule from said hybrid coordinator.

3. The method as claimed in claim 2 further comprising acts of:

sending an acknowledgement from said wireless station to said hybrid coordinator that said wireless station has received said QoS service schedule from said hybrid coordinator;

receiving said acknowledgement in said hybrid coordinator; and

putting said QoS service schedule into effect in said hybrid coordinator.

4. The method as claimed in claim 1 wherein said QoS service schedule further comprises a bandwidth allocation message to said wireless station.

5. The method as claimed in claim 1 wherein said QoS service schedule comprises a schedule element comprising a value of one of:

Element ID, Length, Nominal TXOP Duration, Inter TXOP Interval, Inter TXOP Interval, Inter TXOP Jitter Bound, Maximum TXOP Duration, and Minimum TXOP Duration.

6. The method as claimed in claim 1 further comprising

an act of placing said wireless station back in said power save mode of operation until an occurrence of a next scheduled transmission opportunity.

7. The method as claimed in claim 1 further comprising

an act of sending said QoS service schedule from said hybrid coordinator to said wireless station one of:

periodically and aperiodically.

8. The method as claimed in claim 1 further comprising

an act of sending said QoS service schedule from said hybrid coordinator to said wireless station a selected number of times.

9. The method as claimed in claim 1 further comprising

an act of using information from said QoS service schedule to one of:

(1) perform power management in said wireless station and (2) schedule internally queued data in said wireless station.

10. A wireless network capable of providing a Quality of Service (QoS) service schedule to a wireless station in said wireless network, wherein said wireless network is capable of:

creating in a hybrid coordinator of said wireless network a Quality of Service (QoS) service schedule for said wireless station;

sending said QoS service schedule from said hybrid coordinator to said wireless station;

receiving said QoS service schedule in said wireless station;

determining from said QoS service schedule a scheduled time of a transmission opportunity for said wireless station;

placing said wireless station in a power save mode of operation until said scheduled time of said transmission opportunity;

removing said wireless station from said power save mode of operation before said scheduled time of said transmission opportunity; and

operating said wireless station to send or receive data during said transmission opportunity.

11. The wireless network as claimed in claim 10 wherein said wireless network is further capable of

updating a previous QoS service schedule in said wireless station with said QoS service schedule from said hybrid coordinator.

12. The wireless network as claimed in claim 11 wherein said wireless network is further capable of:

sending an acknowledgement from said wireless station to said hybrid coordinator that said wireless station has received said QoS service schedule from said hybrid coordinator; and

receiving said acknowledgement in said hybrid coordinator; and

putting said QoS service schedule into effect in said hybrid coordinator.

13. The wireless network as claimed in claim 10 wherein said QoS service schedule further comprises a bandwidth allocation message to said wireless station.

14. The wireless network as claimed in claim 10 wherein said QoS service schedule comprises a schedule element comprising a value of one of:

Element ID, Length, Nominal TXOP Duration, Inter TXOP Interval, Inter TXOP Interval, Inter TXOP Jitter Bound, Maximum TXOP Duration, and Minimum TXOP Duration.

15. The wireless network as claimed in claim 10 wherein said wireless network is further capable of

placing said wireless station back in said power save mode of operation until an occurrence of a next scheduled transmission opportunity.

16. Computer-executable instructions stored on a computer-readable storage medium for providing a Quality of Service (QoS) service schedule to a wireless station in a wireless network, said computer-executable instructions comprising acts of:

creating in a hybrid coordinator of said wireless network a Quality of Service (QoS) service schedule for said wireless station;

sending said QoS service schedule from said hybrid coordinator to said wireless station;

receiving said QoS service schedule in said wireless station;

determining from said QoS service schedule a scheduled time of a transmission opportunity for said wireless station;

placing said wireless station in a power save mode of operation until said scheduled time of said transmission opportunity;

removing said wireless station from said power save mode of operation before said scheduled time of said transmission opportunity; and

operating said wireless station to send or receive data during said transmission opportunity.

17. The computer-executable instructions stored on a computer-readable storage medium as claimed in claim 16 wherein said computer-executable instructions further comprise acts of:

updating a previous QoS service schedule in said wireless station with said QoS service schedule from said hybrid coordinator;

sending an acknowledgement from said wireless station to said hybrid coordinator that said wireless station has received said QoS service schedule from said hybrid coordinator;

receiving said acknowledgement in said hybrid coordinator; and

putting said QoS service schedule into effect in said hybrid coordinator.

18. The computer-executable instructions stored on a computer-readable storage medium as claimed in claim 16 wherein said QoS service schedule further comprises a bandwidth allocation message to said wireless station.

19. The computer-executable instructions stored on a computer-readable storage medium as claimed in claim 16 wherein said QoS service schedule comprises a schedule element comprising a value of one of:

Element ID, Length, Nominal TXOP Duration, Inter TXOP Interval, Inter TXOP Interval, Inter TXOP Jitter Bound, Maximum TXOP Duration, and Minimum TXOP Duration.

20. The computer-executable instructions stored on a computer-readable storage medium as claimed in claim 16 wherein said computer-executable instructions further comprise

an act of placing said wireless station back in said power save mode of operation until an occurrence of a next scheduled transmission opportunity.