Medium accessing mechanisms within multiple user, multiple access, and/or MIMO wireless communications

• US 8,441,975 B2
• Filed: 06/22/2010
• Issued: 05/14/2013
• Est. Priority Date: 06/05/2009
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Amini, Peiman, Fischer, Matthew James, Erceg, Vinko, Lauer, Joseph Paul, Kim, Joonsuk
• Primary Examiner(s): Oveissi, David
• Application Number:
  US12/821,094
• Publication Number:
  US 20100309872A1
• Time in Patent Office: 1,057 Days
• Field of Search: None
• US Class Current: 370/312
• CPC Class Codes: H04L 12/413 with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]
• CPC Class Codes: H04W 74/002 Transmission of channel access control information
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02

Abstract

Medium accessing mechanisms within multiple user, multiple access, and/or MIMO wireless communications. A multi-user super-frame (MU-SF), as controlled by a MU-SF owner, is used to govern the manner by which various wireless communication devices have access to the communication medium. When various wireless communication devices operate within a wireless communication system, communication medium access can be handled differently for wireless communication devices having different capabilities. Per the MU-SF, those having a first capability may get medium access in accordance with a first operational mode (e.g., carrier sense multiple access/collision avoidance (CSMA/CA)), while those having a second capability may get medium access in accordance with a second operational mode (e.g., scheduled access). The respective durations for each of the first operational mode and the second operational mode within various MU-SFs need not be the same; the respective durations thereof may be adaptively modified based on any number considerations.

Claims

1. A method for operating a wireless communication device, the method comprising:

generating a multi-user super-frame (MU-SF) announcement frame, wherein;

the MU-SF announcement frame indicating a plurality of MU-SFs during which a plurality of wireless communication devices perform medium access; and

each of the plurality of MU-SFs including a respective first period during which a first of the plurality of wireless communication devices accesses the medium in accordance with a first operational mode, corresponding to a carrier sense multiple access/collision avoidance (CSMA/CA) operational mode applied to at least one of a first plurality of clusters, and a respective second period during which a second of the plurality of wireless communication devices accesses the medium in accordance with a second operational mode using at least one of a second plurality of clusters, such that each of the first plurality of clusters and the second plurality of clusters being a respective mapping of orthogonal frequency division multiplexing (OFDM) tones within a corresponding at least one channel among a corresponding at least one frequency band;

operating a plurality of antennae for transmitting the MU-SF announcement frame to the plurality of wireless communication devices; and

based on the MU-SF announcement frame, supporting communication with the plurality of wireless communication devices or a subset of the plurality of wireless communication devices in accordance with each respective first period and each respective second period of the plurality of MU-SFs.

2. The method of claim 1, wherein:

the MU-SF announcement frame being a multi-user multiple input multiple output (MU-MIMO) frame or an orthogonal frequency division multiple access (OFDMA) frame.

3. The method of claim 1, wherein:

the second operational mode corresponding to a scheduled access operational mode.

4. The method of claim 3, further comprising:

when operating within the scheduled access operational mode, operating the plurality of antennae for transmitting a contention free end (CF end) signal to the plurality of wireless communication devices thereby directing at least one of the plurality of wireless communication devices to cease performing medium access in accordance with the scheduled access operational mode and to perform medium access in accordance with the CSMA/CA operational mode.

5. The method of claim 1, wherein:

the MU-SF announcement frame including cluster information indicating the second plurality of clusters for use, respectively, by the plurality of wireless communication devices for accessing the medium in accordance with the second operational mode.

6. The method of claim 1, wherein:

the first of the plurality of clusters being composed of a first plurality of channels among a first band and a second band; and

the second of the plurality of clusters being composed of a second plurality of channels among a third band and a fourth band.

7. The method of claim 1, wherein:

the second plurality of clusters is the first plurality of clusters.

8. The method of claim 1, wherein:

at least one of the first plurality of clusters and the second plurality of clusters being employed during each of the first operational mode and the second operational mode.

9. The method of claim 1, further comprising:

generating at least one additional MU-SF announcement frame, wherein;

the at least one additional MU-SF announcement frame indicating at least one additional plurality of MU-SFs during which the plurality of wireless communication devices or a subset of the plurality of wireless communication devices perform medium access; and

each of the at least one additional plurality of MU-SFs including a respective first period during which a third of the plurality of wireless communication devices accesses the medium in accordance with the first operational mode and a respective second period during which a fourth of the plurality of wireless communication devices accesses the medium in accordance with the second operational mode;

operating the plurality of antennae for transmitting the at least one additional MU-SF announcement frame to the plurality of wireless communication devices or the subset of the plurality of wireless communication devices perform medium access; and

wherein, at least one of;

one of the plurality of MU-SFs having a length that is different than one of the at least one additional plurality of MU-SFs;

one of the respective first periods within the plurality of MU-SFs having a length that is different than one of respective first periods within the at least one additional plurality of MU-SFs; and

one of the respective second periods within the plurality of MU-SFs having a length that is different than one of respective second periods within the at least one additional plurality of MU-SFs.

10. The method of claim 1, further comprising:

based on the MU-SF announcement frame, directing transmission from the wireless communication device to the plurality of wireless communication devices in accordance with multi-user multiple input multiple output (MU-MIMO); and

based on the MU-SF announcement frame, directing reception from the wireless communication device by the plurality of wireless communication devices in accordance with orthogonal frequency division multiple access (OFDMA).

11. The method of claim 1, further comprising:

based on the MU-SF announcement frame, directing transmission from the wireless communication device to the plurality of wireless communication devices in accordance with multi-user multiple input multiple output (MU-MIMO); and

based on the MU-SF announcement frame, directing reception from the wireless communication device by the plurality of wireless communication devices in accordance with orthogonal frequency division multiple (OFDM).

12. The method of claim 1, further comprising:

based on the MU-SF announcement frame, directing transmission from the wireless communication device to the plurality of wireless communication devices in accordance with multi-user multiple input multiple output (MU-MIMO); and

based on the MU-SF announcement frame, directing reception from the wireless communication device by the plurality of wireless communication devices in accordance with MU-MIMO.

13. The method of claim 1, further comprising:

based on the MU-SF announcement frame, indicating at least one of the first plurality of clusters and the second plurality of clusters for use by at least one of the plurality of wireless communication devices when transmitting an acknowledgment to the wireless communication device in response to a data transmission received from the wireless communication device.

14. The method of claim 1, further comprising:

based on the MU-SF announcement frame, permitting at least one of the plurality of wireless communication devices to aggregate a reverse data transmission with an acknowledgment when transmitting the acknowledgment to the wireless communication device in response to a forward data transmission received from the wireless communication device.

15. The method of claim 1, wherein:

the wireless communication device being an access point (AP); and

the plurality of wireless communication devices being a plurality of wireless stations (STAs).

16. A method for operating a wireless communication device, the method comprising:

generating a multi-user super-frame (MU-SF) announcement frame, wherein;

the MU-SF announcement frame indicating a plurality of MU-SFs during which a plurality of wireless communication devices perform medium access; and

each of the plurality of MU-SFs including a respective first period during which a first of the plurality of wireless communication devices accesses the medium in accordance with a carrier sense multiple access/collision avoidance (CSMA/CA) operational mode and a respective second period during which a second of the plurality of wireless communication devices accesses the medium in accordance with a scheduled access operational mode using at least one of a plurality of clusters, such that each of the plurality of clusters being a respective mapping of orthogonal frequency division multiplexing (OFDM) tones within a corresponding at least one channel among a corresponding at least one frequency band;

operating a plurality of antennae for transmitting the MU-SF announcement frame to the plurality of wireless communication devices; and

based on the MU-SF announcement frame, supporting communication with the plurality of wireless communication devices or a subset of the plurality of wireless communication devices in accordance with each respective first period and each respective second period of the plurality of MU-SFs; and

wherein;

the MU-SF announcement frame including cluster information indicating the plurality of clusters for use, respectively, by the plurality of wireless communication devices for accessing the medium in accordance with the scheduled access operational mode.

17. The method of claim 16, wherein:

the MU-SF announcement frame being a multi-user multiple input multiple output (MU-MIMO) frame or an orthogonal frequency division multiple access (OFDMA) frame.

18. The method of claim 16, wherein:

the CSMA/CA operational mode applied to the at least one of the plurality of clusters, at least one additional of the plurality of clusters, or at least one additional plurality of clusters.

19. The method of claim 16, further comprising:

when operating within the scheduled access operational mode, operating the plurality of antennae for transmitting a contention free end (CF end) signal to the plurality of wireless communication devices thereby directing at least one of the plurality of wireless communication devices to cease performing medium access in accordance with the scheduled access operational mode and to perform medium access in accordance with the CSMA/CA operational mode.

20. The method of claim 16, wherein:

a first of the plurality of clusters being composed of a first plurality of channels among a first band and a second band; and

a second of the plurality of clusters being composed of a second plurality of channels among a third band and a fourth band.

21. The method of claim 16, further comprising:

employing a first of the first plurality of clusters during a first time period of the CSMA/CA operational mode; and

employing a second of the first plurality of clusters during a second time period of the CSMA/CA operational mode.

22. The method of claim 16, wherein:

at least one of the plurality of clusters being employed during each of the CSMA/CA operational mode and the scheduled access operational mode.

23. The method of claim 16, wherein:

the wireless communication device being an access point (AP); and

the plurality of wireless communication devices being a plurality of wireless stations (STAs).

24. An apparatus, comprising:

a baseband processing module to generate a multi-user super-frame (MU-SF) announcement frame; and

a plurality of antennae to transmit the MU-SF announcement frame to a plurality of wireless communication devices; and

wherein;

the MU-SF announcement frame indicating a plurality of MU-SFs during which the plurality of wireless communication devices perform medium access;

each of the plurality of MU-SFs including a respective first period during which a first of the plurality of wireless communication devices accesses the medium in accordance with a first operational mode, corresponding to a carrier sense multiple access/collision avoidance (CSMA/CA) operational mode applied to at least one of a first plurality of clusters, and a respective second period during which a second of the plurality of wireless communication devices accesses the medium in accordance with a second operational mode using at least one of a second plurality of clusters, such that each of the first plurality of clusters and the second plurality of clusters being a respective mapping of orthogonal frequency division multiplexing (OFDM) tones within a corresponding at least one channel among a corresponding at least one frequency band; and

based on the MU-SF announcement frame, the apparatus to support communication with the plurality of wireless communication devices or a subset of the plurality of wireless communication devices in accordance with each respective first period and each respective second period of the plurality of MU-SFs.

25. The apparatus of claim 24, wherein:

the MU-SF announcement frame being a multi-user multiple input multiple output (MU-MIMO) frame or an orthogonal frequency division multiple access (OFDMA) frame.

26. The apparatus of claim 24, wherein:

the second operational mode corresponding to a scheduled access operational mode.

27. The apparatus of claim 26, wherein:

when operating within the scheduled access operational mode, the plurality of antennae to transmit a contention free end (CF end) signal to the plurality of wireless communication devices thereby directing at least one of the plurality of wireless communication devices to cease performing medium access in accordance with the scheduled access operational mode and to perform medium access in accordance with the CSMA/CA operational mode.

28. The apparatus of claim 24, wherein:

the MU-SF announcement frame including cluster information indicating the second plurality of clusters for use, respectively, by the plurality of wireless communication devices for accessing the medium in accordance with the second operational mode.

29. The apparatus of claim 24, wherein:

the first of the plurality of clusters being composed of a first plurality of channels among a first band and a second band; and

the second of the plurality of clusters being composed of a second plurality of channels among a third band and a fourth band.

30. The apparatus of claim 24, wherein:

the second plurality of clusters is the first plurality of clusters.

31. The apparatus of claim 24, wherein:

at least one of the first plurality of clusters and the second plurality of clusters being employed during each of the first operational mode and the second operational mode.

32. The apparatus of claim 24, wherein:

the baseband processing module to generate at least one additional MU-SF announcement frame;

the at least one additional MU-SF announcement frame indicating at least one additional plurality of MU-SFs during which the plurality of wireless communication devices or a subset of the plurality of wireless communication devices perform medium access;

each of the at least one additional plurality of MU-SFs including a respective first period during which a third of the plurality of wireless communication devices accesses the medium in accordance with the first operational mode and a respective second period during which a fourth of the plurality of wireless communication devices accesses the medium in accordance with the second operational mode;

the plurality of antennae to transmit the at least one additional MU-SF announcement frame to the plurality of wireless communication devices or the subset of the plurality of wireless communication devices perform medium access; and

at least one of;

one of the plurality of MU-SFs having a length that is different than one of the at least one additional plurality of MU-SFs;

one of the respective first periods within the plurality of MU-SFs having a length that is different than one of respective first periods within the at least one additional plurality of MU-SFs; and

one of the respective second periods within the plurality of MU-SFs having a length that is different than one of respective second periods within the at least one additional plurality of MU-SFs.

33. The apparatus of claim 24, wherein:

the MU-SF announcement frame indicating at least one of the first plurality of clusters and the second plurality of clusters for use by at least one of the plurality of wireless communication devices when transmitting an acknowledgment to the apparatus in response to a data transmission received from the apparatus.

34. The apparatus of claim 24, wherein:

the MU-SF announcement frame permitting at least one of the plurality of wireless communication devices to aggregate a reverse data transmission with an acknowledgment when transmitting the acknowledgment to the apparatus in response to a forward data transmission received from the apparatus.

35. The apparatus of claim 24, wherein:

the apparatus being an access point (AP); and

the plurality of wireless communication devices being a plurality of wireless stations (STAs).