Techniques for group-based spatial stream assignment signaling in 60 GHz wireless networks

• US 9,596,688 B2
• Filed: 03/28/2015
• Issued: 03/14/2017
• Est. Priority Date: 01/09/2015
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: Ghosh, Chittabrata, Cordeiro, Carlos
• Primary Examiner(s): O'Connor, Brian
• Application Number:
  US14/672,121
• Publication Number:
  US 20160205065A1
• Time in Patent Office: 717 Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0039 Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 72/046 the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• 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: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Techniques for group-based spatial stream assignment signaling in 60 GHz wireless networks are described. According to various such techniques, a 60 GHz-capable transmitting device may be configured to define one or more DL MU-MIMO groups, each of which may comprise one or more respective 60 GHz-capable receiving devices. In various embodiments, the 60 GHz-capable transmitting device may include a DL MU-MIMO group ID within DL control information in a PHY header of a PPDU in order to indicate that the PPDU is directed to a DL MU-MIMO group corresponding to that DL MU-MIMO group ID. In some embodiments, DL MU-MIMO control information may comprise information specifying spatial stream assignments for the 60 GHz-capable receiving devices of that DL MU-MIMO group. Other embodiments are described and claimed.

Claims

1. An apparatus, comprising:

logic, at least a portion of which is in hardware, the logic to determine a group identifier (ID) for a downlink multi-user multiple-input multiple output (DL MU-MIMO) group comprising a station (STA) based on DL MU-MIMO group management information comprised in a received management frame, determine whether a physical layer convergence procedure (PLCP) protocol data unit (PPDU) is addressed to the DL MU-MIMO group comprising the STA based whether a physical layer (PHY) header of the PPDU comprises the group ID for the DL MU-MIMO group comprising the STA, and in response to a determination that the PPDU is addressed to the DL MU-MIMO group comprising the STA, identify one or more spatial streams assigned to the STA based on the PHY header.

2. The apparatus of claim 1, the logic to locate an association identifier (AID) for the STA among an ordered set of AIDs comprised in the DL MU-MIMO group management information, the DL MU-MIMO group management information to indicate a correspondence between the ordered set of AIDs and a DL MU-MIMO group ID, the logic to identify the DL MU-MIMO group ID as the group ID for the DL MU-MIMO group comprising the STA.

3. The apparatus of claim 2, the logic to locate the AID for the STA among one of a plurality of ordered sets of AIDs comprised in the DL MU-MIMO group management information, the DL MU-MIMO group management information to indicate a corresponding DL MU-MIMO group ID for each of the plurality of ordered sets of AIDs.

4. The apparatus of claim 2, the logic to identify a PHY header subfield corresponding to the STA based on a relative position of the AID for the STA among the ordered set of AIDs and identify the one or more spatial streams assigned to the STA based on spatial stream information comprised in the identified PHY header subfield.

5. The apparatus of claim 4, the identified PHY header subfield to comprise a value indicating a number of spatial streams assigned to the STA.

6. The apparatus of claim 5, the logic to identify the one or more spatial streams assigned to the STA based on the number of spatial streams assigned to the STA and on a defined reference order for spatial stream assignment.

7. The apparatus of claim 4, the identified PHY header subfield to comprise a spatial stream bitmap for the STA.

8. The apparatus of claim 1, the logic to receive one or more medium access control (MAC) protocol data units (MPDUs) via the one or more spatial streams.

9. The apparatus of claim 1, comprising a radio interface to receive the management frame over one or more wireless channels of a 60 GHz wireless local area network (WLAN).

10. The apparatus of claim 1, comprising:

at least one radio frequency (RF) transceiver;

at least one RF antenna; and

a touchscreen display.

11. An apparatus, comprising:

logic, at least a portion of which is in hardware, the logic to define a downlink multi-user multiple-input multiple output (DL MU-MIMO) group comprising a plurality of stations (STAs), send a management frame identifying a group identifier (ID) for the DL MU-MIMO group and a respective association identifier (AID) for each of the plurality of STAs, and address a physical layer convergence procedure (PLCP) protocol data unit (PPDU) to the plurality of STAs by including the group ID in a physical layer (PHY) header of the PPDU; and

a radio interface to transmit the PPDU via a plurality of spatial streams, the PHY header to identify a respective assignment of one or more of the plurality of spatial streams to each of the plurality of STAs.

12. The apparatus of claim 11, the PHY header to comprise a plurality of spatial stream information subfields, each spatial stream information subfield to correspond to a respective one of the plurality of STAs, the plurality of spatial stream information subfields positioned according to an order in which the AIDs for their respective corresponding STAs appear in the management frame.

13. The apparatus of claim 12, each spatial stream information subfield to indicate a number of spatial streams assigned to its corresponding STA.

14. The apparatus of claim 12, each spatial stream information subfield to comprise a spatial stream bitmap for its corresponding STA.

15. The apparatus of claim 11, the PPDU to encapsulate a plurality of medium access control (MAC) protocol data units (MPDUs), the plurality of MPDUs to include, for each of the plurality of STAs, at least one MPDU comprising data for that STA.

16. The apparatus of claim 11, the radio interface to transmit the PPDU over one or more wireless channels of a 60 GHz wireless local area network (WLAN).

17. An access point (AP) comprising the apparatus of claim 16, the AP to comprise a personal basic service set (PBSS) control point/access point (PCP/AP) for the 60 GHz WLAN.

18. At least one non-transitory computer-readable storage medium, comprising a set of instructions that, in response to being executed by circuitry of a station (STA), cause the STA to:

determine a group identifier (ID) for a downlink multi-user multiple-input multiple output (DL MU-MIMO) group comprising the STA based on DL MU-MIMO group management information comprised in a received management frame;

determine whether a physical layer convergence procedure (PLCP) protocol data unit (PPDU) is addressed to the DL MU-MIMO group comprising the STA based whether a physical layer (PHY) header of the PPDU comprises the group ID for the DL MU-MIMO group comprising the STA; and

in response to a determination that the PPDU is addressed to the DL MU-MIMO group comprising the STA, identify one or more spatial streams assigned to the STA based on the PHY header.

19. The at least one non-transitory computer-readable storage medium of claim 18, comprising instructions that, in response to being executed by the circuitry of the STA, cause the STA to:

locate an association identifier (AID) for the STA among an ordered set of AIDs comprised in the DL MU-MIMO group management information, the DL MU-MIMO group management information to indicate a correspondence between the ordered set of AIDs and a DL MU-MIMO group ID; and

identify the DL MU-MIMO group ID as the group ID for the DL MU-MIMO group comprising the STA.

20. The at least one non-transitory computer-readable storage medium of claim 19, comprising instructions that, in response to being executed by the circuitry of the STA, cause the STA to locate the AID for the STA among one of a plurality of ordered sets of AIDs comprised in the DL MU-MIMO group management information, the DL MU-MIMO group management information to indicate a corresponding DL MU-MIMO group ID for each of the plurality of ordered sets of AIDs.

21. The at least one non-transitory computer-readable storage medium of claim 19, comprising instructions that, in response to being executed by the circuitry of the STA, cause the STA to:

identify a PHY header subfield corresponding to the STA based on a relative position of the AID for the STA among the ordered set of AIDs; and

identify the one or more spatial streams assigned to the STA based on spatial stream information comprised in the identified PHY header subfield.

22. The at least one non-transitory computer-readable storage medium of claim 21, comprising instructions that, in response to being executed by the circuitry of the STA, cause the STA to identify the one or more spatial streams assigned to the STA based on a number of spatial streams assigned to the STA and on a defined reference order for spatial stream assignment, the identified PHY header subfield to comprise a value indicating the number of spatial streams assigned to the STA.

23. The at least one non-transitory computer-readable storage medium of claim 21, the identified PHY header subfield to comprise a spatial stream bitmap for the STA.

24. The at least one non-transitory computer-readable storage medium of claim 18, comprising instructions that, in response to being executed by the circuitry of the STA, cause the STA to receive one or more medium access control (MAC) protocol data units (MPDUs) via the one or more spatial streams.

25. The at least one non-transitory computer-readable storage medium of claim 18, comprising instructions that, in response to being executed by the circuitry of the STA, cause the STA to receive the management frame over one or more wireless channels of a 60 GHz wireless local area network (WLAN).