Method, apparatus, and computer readable medium for multi-user scheduling in wireless local-area networks

• US 10,368,368 B2
• Filed: 01/16/2018
• Issued: 07/30/2019
• Est. Priority Date: 11/19/2013
• Status: Active Grant

• Current Assignee: Ax Wireless LLC (SY Ventures)
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: Li, Guoqing C., Azizi, Shahrnaz, Stacey, Robert J.
• Primary Examiner(s): Cho, Hong S
• Application Number:
  US15/872,114
• Publication Number:
  US 20180199368A1
• Time in Patent Office: 560 Days
• Field of Search: None
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/2603 Signal structure ensuring backward compatibility with legacy system
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Methods, apparatuses, and computer readable media are shown for multi-user scheduling in wireless local-area networks (WLANs). A wireless communication device is shown including circuitry to determine a plurality of schedules for each of a plurality of channels for an orthogonal frequency division multiple access (OFDMA) communication in a wireless local-area network (WLAN). Each of the plurality of schedules may include a frequency allocation for one or more communication devices. The circuitry may be further configured to transmit the corresponding schedule of the one or more schedules on each of the one or more channels. Each of the plurality of schedules may include a schedule type and a user association identification (AID) list. A number of user AIDs in the user AID list may be based on the schedule type.

Claims

1. An apparatus of a high-efficiency (HE) access point (AP), the apparatus comprising:

memory; and

processing circuitry coupled to the memory, the processing circuitry configured to;

encode a HE physical layer convergence protocol (PLCP) protocol data unit (PPDU), the PPDU comprising a plurality of HE signal (HE-SIG) fields, wherein the plurality of HE-SIG fields are to be transmitted on separate 20 MHz sub-channels of a plurality of 20 MHz sub-channels,

wherein each HE-SIG field comprises a schedule type field and a station list field, wherein a value of the schedule type field indicates a list of sub-channel allocation assignments, and

wherein the station list field comprises multiple station fields, wherein each station field of the multiple station fields comprises an association identification (AID), wherein the list of sub-channel allocation assignments and a position of a station field in the multiple station fields together identify a frequency allocation for a HE station identified by the AID of the station field; and

generate signalling to cause the HE PPDU to be wirelessly transmitted by the HE AP within the plurality of 20 MHz sub-channels, wherein the plurality of HE SIG fields of the HE PPDU are concurrently transmitted on an associated one of the plurality of 20 MHz subchannels.

2. The apparatus of claim 1, wherein the processing circuitry is further configured to:

encode a data portion of the HE PPDU in accordance with the plurality of HE-SIG fields.

3. The apparatus of claim 1, wherein the value of the schedule type field further indicates a number of HE stations sharing the frequency allocation.

4. The apparatus of claim 1, wherein the HE-SIG field further indicates a number of spatial streams for each HE station identified by the AID of the station field in the multiple station fields.

5. The apparatus of claim 1, wherein the frequency allocation for the HE station is an orthogonal frequency division multiple access (OFDMA) frequency allocation.

6. The apparatus of claim 1, wherein the plurality of 20 MHz channels is one from the following group:

40 MHz, 80 MHz, and 160 MHz.

7. The apparatus of claim 1, wherein the HE PPDU being wirelessly transmitted begin a transmission opportunity (TXOP).

8. The apparatus of claim 1, wherein each station field of the multiple station fields further comprises a field to indicate a number of spatial streams allocated to the HE station identified by a corresponding AID.

9. The apparatus of claim 1, wherein each station field of the multiple station fields further comprises a modulation and coding scheme (MCS) field to indicate a MCS for a corresponding frequency allocation.

10. The apparatus of claim 1, wherein each station field comprises a different AID.

11. The apparatus of claim 1, wherein the processing circuitry is further configured to:

decode HE PPDUs in accordance with the plurality of HE-SIG fields.

12. The apparatus of claim 1, wherein the HE station and the HE AP are each one from the following group:

an institute of Electrical and Electronic Engineers (IEEE) 802.11ax access point, an IEEE 802.11ax station, an IEEE 802.11 station, and an IEEE 802.11 access point.

13. The apparatus of claim 1, further comprising:

transceiver circuitry coupled to the processing circuitry; and

one or more antennas coupled to the transceiver circuitry, and wherein the memory is configured to store the HE PPDU.

14. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of an apparatus of a high-efficiency (HE) access point (AP), the instructions to configure the one or more processors to:

encode a HE physical layer convergence protocol (PLCP) protocol data unit (PPDU), the PPDU comprising a plurality of HE signal (HE-SIG) fields, wherein the plurality of HE-SIG fields are to be transmitted on separate 20 MHz sub-channels of a plurality of 20 MHz sub-channels,

wherein each HE-SIG field comprises a schedule type field and a station list field, wherein a value of the schedule type field indicates a list of sub-channel allocation assignments, and

wherein the station list field comprises multiple station fields, wherein each station field of the multiple station fields comprises an association identification (AID), wherein the list of sub-channel allocation assignments and a position of a station field in the multiple station fields together identify a frequency allocation for a HE station identified by the AID of the station field; and

generate signalling to cause the HE PPDU to be wirelessly transmitted by the HE AP within the plurality of 20 MHz sub-channels, wherein the plurality of HE SIG fields of the HE PPDU are concurrently transmitted on an associated one of the plurality of 20 MHz subchannels.

15. The non-transitory computer-readable storage medium of claim 14, wherein the instructions further configure the one or more processors to:

encode a data portion of the HE PPDU in accordance with the plurality of HE-SIG fields.

16. The non-transitory computer-readable storage medium of claim 14, wherein the value of the schedule type field further indicates a number of HE stations sharing the frequency allocation for the HE station.

17. The non-transitory computer-readable storage medium of claim 14, wherein the HE-SIG field further indicates a number of spatial streams for each HE station identified by the AID of the station field in the multiple station fields.

18. A method performed by an apparatus of a high-efficiency (HE) access point (AP), the method comprising:

encoding a HE physical layer convergence protocol (PLCP) protocol data unit (PPDU), the PPDU comprising a plurality of HE signal (HE-SIG) fields, wherein the plurality of HE-SIG fields are to be transmitted on separate 20 MHz sub-channels of a plurality of 20 MHz sub-channels,

wherein each HE-SIG field comprises a schedule type field and a station list field, wherein a value of the schedule type field indicates a list of sub-channel allocation assignments, and

wherein the station list field comprises multiple station fields, wherein each station field of the multiple station fields comprises an association identification (AID), wherein the list of sub-channel allocation assignments and a position of a station field in the multiple station fields together identify a frequency allocation for a HE station identified by the AID of the station field; and

generating signalling to cause the HE PPDU to be wirelessly transmitted by the HE AP within the plurality of 20 MHz sub-channels, wherein the plurality of HE SIG fields of the HE PPDU are concurrently transmitted on an associated one of the plurality of 20 MHz subchannels.

19. The method of claim 18, the method further comprising:

encoding a data portion of the HE PPDU in accordance with the plurality of HE-SIG fields.

20. An apparatus of a first high-efficiency (HE) station, the apparatus comprising:

memory; and

processing circuitry coupled to the memory, the processing circuitry configured to;

decode a HE physical layer convergence protocol (PLCP) protocol data unit (PPDU), the PPDU comprising a plurality of HE signal (HE-SIG) fields, wherein the plurality of HE-SIG fields are transmitted on separate 20 MHz sub-channels of a plurality of 20 MHz sub-channels,

wherein each HE-SIG field comprises a schedule type field and a station list field, wherein a value of the schedule type field indicates a list of sub-channel allocation assignments, and

wherein the station list field comprises multiple station fields, wherein a station field of the multiple station fields comprises an association identification (AID) of the HE station, wherein the list of sub-channel allocation assignments and a position of the station field in the multiple station fields together identify a frequency allocation for the HE station; and

decode data in accordance with the frequency allocation.

21. The apparatus of claim 20, wherein the value of the schedule type field further indicates a number of HE stations sharing the frequency allocation with the HE station.

22. The apparatus of claim 20, wherein the HE-SIG field further indicates a number of spatial streams for the HE station.

23. The apparatus of claim 20, wherein the frequency allocation for the HE station is an orthogonal frequency division multiple access (OFDMA) frequency allocation.

24. The apparatus of claim 20, further comprising transceiver circuitry coupled to the processing circuitry;

and, one or more antennas coupled to the transceiver circuitry, wherein the memory is configured to store the HE PPDU.