Master station and method for HEW communication with signal field configuration for HEW OFDMA MU-MIMO wideband channel operation

• US 9,961,678 B2
• Filed: 09/17/2014
• Issued: 05/01/2018
• 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, Kenney, Thomas J., Perahia, Eldad, Stacey, Robert J.
• Primary Examiner(s): Patel, Chandrahas B
• Application Number:
  US15/023,262
• Publication Number:
  US 20160242173A1
• Time in Patent Office: 1,322 Days
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• 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 72/29 between an access point and the access point controlling device
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Embodiments of master station and method for high-efficiency WLAN (HEW) communication are generally described herein. In some embodiments, the master station is configured for HEW communication in accordance with an IEEE 802.11ax technique. The master station may transmit an indication to one or more of a plurality of HEW stations to indicate which one of a plurality of 20 MHz channels to monitor for a HEW signal field. The master station may configure the HEW signal field to indicate which of a plurality of subchannels of the indicated 20 MHz channel is allocated to the HEW stations for communication. The master station may transmit the configured HEW signal field in the indicated one of the 20 MHz channels and may communicate with the HEW stations on the indicated subchannels in accordance with an orthogonal-frequency divisional multiple access (OFDMA) technique.

Claims

1. An apparatus of a master station configured for high-efficiency (HE) wireless local area network (WLAN) communication, the apparatus comprising:

memory; and

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

configure the master station to transmit an indication to one or more of a plurality of HE stations to indicate which one of a plurality of 20 MHz channels to monitor for a HE signal field;

configure the HE signal field to indicate which of a plurality of subchannels of the indicated 20 MHz channel is allocated to the HE stations for communication;

configure the master station to transmit the configured HE signal field in the indicated one of the 20 MHz channels; and

communicate with the HE stations on the indicated subchannels in accordance with an orthogonal-frequency divisional multiple access (OFDMA) technique.

2. The apparatus of the master station of claim 1 wherein, the indication is a station (STA) OFDMA grouping information element (IE) which is configurable to include a list of association identifiers (AIDS) for each 20 MHz channel of the plurality of 20 MHz channels;

each AID corresponding to one of the HE stations.

3. The apparatus of the master station of claim 2 wherein, the list of AIDs for a particular 20 MHz channel comprises a multi-user (MU) multiple-input multiple-output (MIMO) (MU-MIMO) group of the HE stations, and

wherein the master station is configured to communicate with the HEW stations on the indicated subchannels using a MU-MIMO OFDMA technique.

4. The apparatus of the master station of claim 3 wherein, the STA OFDMA grouping IE includes an information element (IE) header field followed by a variable-length AID list field, the variable-length AID list field configurable to include a AID list subfield for each of the 20 MHz channels, wherein each AID list subfield includes the list of AIDs for an associated one of the 20 MHz channels.

5. The apparatus of the master station of claim 4 wherein, the IE header field includes an element identifier (ID) field to identify the information element as the STA OFDMA grouping IE and a length field to indicate a length of the STA OFDMA grouping IE.

6. The apparatus of the master station of claim 4 wherein, each AID list subfield indicates a number of AIDs in the list followed by the AIDs in the list.

7. The apparatus of the master station of claim 2 wherein, the STA OFDMA grouping IE is transmitted in one of a broadcast frame, a multicast frame or a beacon and comprises a transmission in one of the 20 MHz channels.

8. The apparatus of the master station of claim 1 wherein, the indication that is transmitted to indicate which one of a plurality of 20 MHz channels to monitor for the HE signal field is a station (STA) OFDMA pre-configuration frame configured for unicast transmission and comprises a channel monitoring bitmap that indicates one of a plurality of the 20 MHz channels.

9. The apparatus of the master station of claim 8 wherein, the channel monitoring bitmap indicates to an HE station to switch to another 20 MHz channel for determining OFDMA configuration information from an HE signal field that is to be subsequently transmitted on the other 20 MHz channel.

10. The apparatus of the master station of claim 9, wherein the channel monitoring bitmap comprises a bit for each of the 20 MHz channels, wherein the master station is configured to set one or more of the bits to indicate which of the 20 MHz channels the indicated HE station is to monitor for the HE signal field,

wherein the STA OFDMA pre-configuration frame comprises a transmission within one of the subchannels, and

wherein the subchannels comprise OFDMA subchannels.

11. The apparatus of the master station of claim 10, the apparatus further comprising transceiver circuitry coupled to the memory;

and, one or more antennas coupled to the transceiver circuitry.

12. The master station of claim 1 wherein, the subchannels have predefined bandwidths of one or more of 1 MHz, 2.5 MHz, 5 MHz and 10 MHz,

wherein during a HE control period, the master station is configured to:

receive uplink OFDMA transmissions from the HE stations in accordance with an uplink multiplexing technique on the indicated subchannels, and/or

transmit downlink transmissions to the HE stations in accordance with a downlink multiplexing technique on the indicated subchannels.

13. A method performed by an apparatus of a master station configured for high-efficiency (HE) wireless local area network (WLAN) WLAN (HEW) communication, the method comprising:

transmitting an indication to one or more of a plurality of HE stations to indicate which one of a plurality of 20 MHz channels to monitor for a HE signal field;

configuring the HE signal field to indicate which of a plurality of subchannels of the indicated 20 MHz channel is allocated to the HE stations for communication;

transmitting the configured HE signal field in the indicated one of the 20 MHz channels; and

communicating with the HE stations on the indicated subchannels in accordance with an orthogonal-frequency divisional multiple access (OFDMA) technique.

14. The method of claim 13 wherein, the indication is a station (STA) OFDMA grouping information element (IE) which is configurable to include a list of association identifiers (AIDS) for each 20 MHz channel of the plurality of 20 MHz channels, each AID corresponding to one of the HE stations,

wherein the list of MIN for a particular 20 MHz channel comprises a multi-user (MU) multiple-input multiple-output (MIMO) (MU-MIMO) group of stations, and

wherein the method further comprises communicating with the HE stations on the indicated subchannels using a MU-MIMO OFDMA technique.

15. The method of claim 14 wherein the indication that is transmitted to indicate which one of a plurality of 20 MHz channels to monitor for a HE signal field is a STA OFDMA pre-configuration frame configured for unicast transmission and comprises a channel monitoring bitmap that indicates one of a plurality of the 20 MHz channels.

16. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of a master station to perform operations, the operations to configure the one or more processors for:

transmitting an indication to one or more of a plurality of HE stations to indicate which one of a plurality of 20 MHz channels to monitor for a HEW signal field;

configuring the HEW signal field to indicate which of a plurality of subchannels of the indicated 20 MHz channel is allocated to the HEW stations for communication;

transmitting the configured HEW signal field in the indicated one of the 20 MHz channels; and

communicating with the HEW stations on the indicated subchannels in accordance with an orthogonal-frequency divisional multiple access (OFDMA) technique.

17. The non-transitory computer-readable storage medium of claim 16 wherein the indication is a station (STA) OFDMA grouping information element (IE) which is configurable to include a list of association identifiers (AIDs) for each 20 MHz channel of the plurality of 20 MHz channels, each AID corresponding to one of the HE stations,

wherein the list of AIDs for a particular 20 MHz channel comprises a multi-user (MU) multiple-input multiple-output (MIMO) (MU-MIMO) group of stations, and

wherein the operations further comprise communicating with the HE stations on the indicated subchannels using a MU-MIMO OFDMA technique.

18. The non-transitory computer-readable storage medium of claim 17 wherein the indication that is transmitted to indicate which one of a plurality of 20 MHz channels to monitor for a HE signal field is a STA OFDMA pre-configuration frame configured for unicast transmission and comprises a channel monitoring bitmap that indicates one of a plurality of the 20 MHz channels.

19. A high-efficiency (HE) wireless local area network (WLAN) station comprising physical layer and medium access control layer circuitry configured to:

receive a STA OFDMA grouping information element (IE) from a master station that indicates which one of a plurality of 20 MHz channels to monitor for a HE signal field;

monitor the indicated 20 MHz channel for the HE signal field;

determine from the HE signal field which of a plurality of subchannels of the indicated 20 MHz channel is allocated for communication;

communicate with the master station on the indicated one or more subchannels in accordance with an orthogonal-frequency divisional multiple access (OFDMA) technique based on configuration information received in the HE signal field.

20. The HE station of claim 19 wherein the station (STA) OFDMA grouping ID includes a list of association identifiers (AIDs) for each 20 MHz channel of the plurality of 20 MHz channels, each AID corresponding to one of a plurality of HE stations,

wherein the list of AIDs for a particular 20 MHz channel comprises a multi-user (MU) multiple-input multiple-output (MIMO) (MU-MIMO) group of stations, and

wherein the HE station is configured to communicate with the master station on the indicated subchannel in accordance with a MU-MIMO OFDMA technique.

21. The HE station of claim 20 further configured to receive a STA OFDMA pre-configuration frame on the indicated subchannel, the STA OFDMA pre-configuration frame comprising a channel monitoring bitmap that indicates one of a plurality of the 20 MHz channels, the channel monitoring bitmap indicating to the HE station to switch to another channel for determining OFDMA configuration information from an HE signal field that is to be subsequently transmitted on the other channel.

22. The HE station of claim 21 comprising one or more radios and memory.

23. The HE station of claim 22 further comprising one or more antennas coupled to the one or more radios.