Techniques to provide a new or suggested data transmission schedule in a wireless network

• US 20070097867A1
• Filed: 11/03/2005
• Published: 05/03/2007
• Est. Priority Date: 11/03/2005
• Status: Abandoned Application

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Kasslin, Mika, Kneckt, Jarkko, Jokela, Jari
• Application Number:
  US11/266,775
• Publication Number:
  US 20070097867A1
• Time in Patent Office: Days
• US Class Current: 370/236
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Various embodiments are disclosed relating to techniques to provide a new or suggested data transmission schedule in a wireless network. According to an example embodiment, an AP may provide a station with a new (or changed) data transmission schedule or a suggested data transmission schedule to relocate the data transmission or contention start times for stations to a more favorable time (e.g., where there may be a lower probability for collisions with other stations).

Claims

1. A method comprising:

receiving, at a first wireless station in a wireless network, a first data transmission schedule from a second wireless station;

attempting, by the first wireless station, to transmit data according to the first data transmission schedule;

transmitting a request for a data transmission schedule change to the second wireless station;

receiving, at the first wireless station and in response to the transmitting the request, a second data transmission schedule from the second wireless station.

2. The method of claim 1 wherein the first station is operating in either a non power-save delivery mode or an unscheduled power-save delivery mode, the receiving a second data transmission schedule comprises receiving at the first wireless station a second data transmission schedule from the second wireless station, the first and second data transmission schedules being suggested and optional data transmission schedules for the second station.

3. The method of claim 1 wherein the first wireless station is operating in a scheduled power-save delivery mode, the receiving a second data transmission schedule comprises receiving, at the first wireless station and in response to the transmitting the request, a second data transmission schedule from the second wireless station, the first wireless station transmitting and receiving data according to the received data transmission schedules.

4. The method of claim 1 and further comprising attempting, by the first wireless station, to transmit data according to the second data transmission schedule.

5. The method of claim 1 wherein the receiving a first data transmission schedule comprises:

transmitting an add traffic stream request to the second wireless station;

receiving, at the first wireless station, the first data transmission schedule via an add traffic stream response from the second wireless station.

6. The method of claim 1 wherein the transmitting a request for a data transmission schedule change comprises transmitting an add traffic stream request to the second wireless station, the add traffic stream request including a traffic specification element with a field set to indicate a request for a new or different data transmission schedule.

7. The method of claim 1 wherein the transmitting a request for a data transmission schedule change comprises transmitting an add traffic stream request to the second wireless station, the add traffic stream request including at least one of:

a requested service start time indicating a requested time when a first service period for data transmission would start; and

a requested service interval indicating a requested time or requested range of times between two successive service periods for data transmission.

8. The method of claim 1 wherein the attempting to transmit comprises attempting to obtain a transmission opportunity (TXOP) via a contention-based channel access mechanism during a time indicated by the first data transmission schedule.

9. The method of claim 1 wherein the transmitting a request for a data transmission schedule change comprises:

detecting a data collision or other transmission difficulty during the attempting to transmit data; and

transmitting a request for a new data transmission schedule to the second wireless station.

10. The method of claim 1 wherein the receiving a first data transmission schedule comprises receiving a first data transmission schedule from the second wireless station, and wherein receiving a second data transmission schedule comprises receiving, in response to the sending the request, a second data transmission schedule from the second wireless station, wherein each of the first data transmission schedule and the second data transmission schedule includes at least one of:

a service start time indicating an anticipated time when a first service period starts for data transmission; and

a service interval indicating a time between two successive service periods for data transmission.

11. The method of claim 1 wherein the transmitting a request for a data transmission schedule change comprises transmitting a request for a data transmission schedule change to the second wireless station via an intermediate station;

wherein said receiving a second data transmission schedule comprises receiving, at the first wireless station via the intermediate station and in response to the transmitting the request, a second data transmission schedule from the second wireless station.

12. A method comprising:

transmitting a request for a suggested data transmission schedule from a first wireless station in a wireless network to a second wireless station; and

receiving, at the first wireless station and in response to the transmitting the request, a suggested and optional data transmission schedule from the second wireless station.

13. The method of claim 12 wherein the transmitting comprises transmitting a request for a suggested data transmission schedule from a first wireless station in a wireless network to a second wireless station, the first wireless station operating in either a non power-save delivery mode or an unscheduled power-save delivery mode.

14. The method of claim 12 and further comprising the first station obtaining a transmission opportunity via a contention-based channel access mechanism according to the received data transmission schedule.

15. The method of claim 12 wherein the transmitting a request for a suggested data transmission schedule comprises transmitting an add traffic stream request to the second wireless station, the add traffic stream request including a field indicating a request for a schedule or schedule change.

16. The method of claim 12 and further comprising the first station providing an indication to the second station that interference was detected and the approximate time of the interference.

17. A method comprising:

receiving at a first station a measurement report including information relating to a performance or operation of a second wireless station;

transmitting a data transmission schedule to the second wireless station.

18. The method of claim 17 wherein the receiving comprises receiving, at a first station from the second station, a quality of service (QoS) related report including one or more measured QoS parameters for the second wireless station.

19. The method of claim 17 wherein the transmitting comprises at least one of:

transmitting a suggested and optional data transmission schedule to the second station, the second station operating in either a non power-save delivery mode or an unscheduled power-save delivery mode;

transmitting a new or changed data transmission schedule to the second wireless station, the second station operating in a power-save delivery mode and transmitting and receiving data according to the new data transmission schedule.

20. The method of claim 17 wherein the receiving comprises receiving a triggered quality of service (QoS) related report including one or more measured QoS parameters for the second station, the triggered QoS related report being transmitted from the second wireless station to the first wireless station when a QoS related threshold is met.

21. An apparatus provided in a station for wireless communication, the apparatus comprising:

a controller;

a memory coupled to the controller; and

a wireless transceiver coupled to the controller; and

the apparatus adapted to;

transmit a request for a suggested data transmission schedule to a first wireless station; and

receive, in response to the transmitting the request, a suggested and optional data transmission schedule from the first wireless station.

22. The apparatus of claim 21 wherein the apparatus comprises a wireless station operating in either a non power-save delivery mode or an unscheduled power-save delivery mode.

23. An apparatus comprising:

a computing device; and

instructions that when executed on the computing device cause the computing device to;

receive at a first station a measurement report including information relating to a performance or operation of a second wireless station; and

transmit a data transmission schedule to the second wireless station in response to receiving the measurement report.

24. The apparatus of claim 23 wherein said instructions, when executed on the computing device, cause the computing device to:

determine if the measurement report indicates the performance or operation of the second wireless station meets a criteria; and

transmit a data transmission schedule to the second wireless station if, based on the measurement report, the performance or operation of the second wireless station meets the criteria.

25. An article comprising:

a storage medium;

said storage medium including stored thereon instructions that, when executed by a processor, result in;

transmitting a request for a suggested or changed data transmission schedule from a first wireless station in a wireless network to a second wireless station; and

receiving, at the first wireless station and in response to the transmitting the request, the requested data transmission schedule from the second wireless station.

26. The article of claim 25 wherein the instructions resulting in receiving comprises receiving at the first wireless station a suggested and optional data transmission schedule for the second station, the first station operating in either a non power-save delivery mode or an unscheduled power-save delivery mode.

27. An article comprising:

a storage medium;

said storage medium including stored thereon instructions that, when executed by a processor, result in;

receiving a request for a suggested or changed data transmission schedule at a first wireless station from a second wireless station in a wireless network; and

transmitting, from the first wireless station and in response to the receiving the request, the requested data transmission schedule to the second wireless station.

28. The article of claim 27 wherein the instructions resulting in receiving comprises receiving at the first wireless station a request for a suggested and optional data transmission schedule for the second station, wherein second station is operating in either a non power-save delivery mode or an unscheduled power-save delivery mode.

29. An apparatus comprising:

a computing device; and

instructions that when executed on the computing device cause the computing device to;

receive a request for a suggested or changed data transmission schedule at a first wireless station from a second wireless station in a wireless network; and

transmit, from the first wireless station and in response to the receiving the request, the requested data transmission schedule to the second wireless station.

30. The apparatus of claim 29 wherein said instructions that cause the computing device to receive comprises:

instructions that cause the computing device to receive at the first wireless station a request for a suggested and optional data transmission schedule for the second station, wherein second station is operating in either a non power-save delivery mode or an unscheduled power-save delivery mode.