Hew master station and method for communicating in accordance with a scheduled OFDMA technique on secondary channels

• US 10,348,469 B2
• Filed: 11/02/2017
• Issued: 07/09/2019
• Est. Priority Date: 11/19/2013
• Status: Active Grant

• Current Assignee: Ax Wireless LLC (SY Ventures)
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: Azizi, Shahrnaz, Kenney, Thomas J., Perahia, Eldad
• Primary Examiner(s): Smarth, Gerald A
• Application Number:
  US15/801,680
• Publication Number:
  US 20180109365A1
• Time in Patent Office: 614 Days
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/2615 using hybrid frequency-time division multiple access [FDMA-TDMA]
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• 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 27/261 Details of reference signals
• CPC Class Codes: H04L 27/3405 Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
• CPC Class Codes: H04L 27/3483 using a modulation of the constellation points
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 52/0206 in access points, e.g. base stations access point devices per se H04W88/08
• CPC Class Codes: H04W 52/244 Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/0473 : the resource being transmission power
• 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 72/27 : between access points
• CPC Class Codes: H04W 74/02 : Hybrid access
• CPC Class Codes: H04W 74/04 : Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 74/08 : Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: H04W 74/0808 : using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 84/12 : WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: H04W 88/10 : adapted for operation in multiple networks, e.g. multi-mode access points
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Embodiments of a high-efficiency WLAN (HEW) master station and method for communicating in accordance with a scheduled OFDMA technique on secondary channels are generally described herein. An access point is configured to operate as part of a basic-service set (BSS) that includes a plurality of high-efficiency WLAN (HEW) stations and a plurality of legacy stations. The BSS operates on a primary channel and one or more secondary channels. In accordance with some embodiments, the access point may communicate with one or more of the HEW stations on one or more of the secondary channels in accordance with a scheduled OFDMA communication technique when the primary channel is utilized for communication with one or more of the legacy devices.

Claims

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

processing circuitry; and

memory, the HE-AP configured for communication with a plurality of HE stations (HE-STAs) using a plurality of 20 MHz channels, the processing circuitry configured to;

encode an HE physical-layer protocol data unit (PPDU) (HE-PPDU), the HE-PPDU to include;

a plurality of signal fields including one or more non-HE signal fields and one or more HE signal fields, wherein the one or more HE signal fields include;

a first HE signal field comprising a first portion in accordance with a binary phase-shift keying (BPSK) constellation and a second portion in accordance with either a BPSK or a quaternary binary phase shift keying (QBPSK) constellation, the BPSK constellation being different than the QBPSK constellation, and

a second HE signal field, the second HE signal field to provide resource allocation information to the plurality of HE-STAs,

wherein the resource allocation information is configurable to indicate a plurality of resource units (RUs) within each of the plurality of 20 MHz channels, the RUs configurable to have bandwidths less than 20 MHz to allow multiple RUs within each 20 MHZ channel,

wherein the one or more non-HE signal fields are configured to follow a short training field (L-STF) and a long training field (L-LTF) of the HE-PPDU;

obtain a transmission opportunity (TXOP) for transmission of the HE-PPDU, the first HE signal field being duplicated for transmission on each 20 MHz channel, the second HE signal field being separately encoded for transmission on each 20 MHz channel; and

cause to transmit, during the TXOP, downlink data to the HE-STAs within the plurality of RUs in accordance with multi-user multiple input multiple output (MU-MIMO), or

cause to receive, during the TXOP, uplink data from the HE-STAs within the plurality of RUs in accordance with orthogonal frequency division multiple access (OFDMA).

2. The apparatus of claim 1 wherein the processing circuitry is configured to select the constellation of the second portion of the first HE signal field to signal whether the HE-PPDU is for multi-user operation.

3. The apparatus of claim 1, wherein, based on an indication in one of the HE signal fields, the processing circuitry is to configure the HE-AP to:

receive the uplink data from the HE-STAs in accordance with OFDMA, or transmit the downlink data to the HE-STAs in accordance with MU-MIMO.

4. The apparatus of claim 1 wherein the plurality of 20 MHz channels includes a primary 20 MHz channel and one or more secondary 20 MHz channels.

5. The apparatus of claim 1 wherein the processing circuitry is configured to encode the second HE signal field to comprise an indicator to indicate an arrangement of the RUs in frequency in a corresponding one of the 20 MHz channels of the plurality,

wherein the second HE signal field is to configure the HE STAs to receive a data portion of the HE-PPDU in the corresponding 20 MHz channel, and

wherein the second HE signal field is separately encoded for transmission on the corresponding 20 MHz channel of the HE PPDU.

6. The apparatus of claim 5 wherein the indicator further indicates a number of users allocated for MU-MIMO.

7. The apparatus of claim 1 wherein the processing circuitry is to encode the second HE signal field to comprise an indicator to indicate, for a 20 MHz channel, an RU arrangement of a plurality of RU arrangements in a frequency domain, the indicator to further indicate a number of MU-MIMO allocations, the RU arrangement comprising a mix of different RU sizes for the 20 MHz channel, wherein the HE signal field is to configure the HE stations to receive a data portion of the HE-PPDU, the data portion of the HE-PPDU configured in accordance with the RU arrangement.

8. The apparatus of claim 7 wherein the second HE signal field further comprises configuration parameters for each RU of the RU arrangement of the plurality of RU arrangements, and wherein the configuration parameters comprise one or more of the following fields:

an indication of a modulation and coding scheme (MCS), an indicator if a Low-density parity-check code is to be used, and an indication if beamforming is to be used.

9. The apparatus of claim 1 further comprising transceiver circuitry coupled to a plurality of antennas, the transceiver circuitry configurable to:

transmit, during the TXOP, the downlink data to the HE-STAs, within the plurality of RUs in accordance with MU-MIMO, and

receive, during the TXOP, uplink data from the HE-STAs.

10. The apparatus of claim 1 wherein the memory is configured to store the resource allocation information.

11. A method performed by a high-efficiency (HE) access point (HE-AP), the HE-AP configured for communication with a plurality of HE stations (HE-STAs) using a plurality of 20 MHz channels, the method comprising:

encoding an HE physical-layer protocol data unit (PPDU) (HE-PPDU), the HE-PPDU to include;

a plurality of signal fields including one or more non-HE signal fields and one or more HE signal fields, wherein the one or more HE signal fields include;

a first HE signal field comprising a first portion in accordance with a binary phase-shift keying (BPSK) constellation and a second portion in accordance with either a BPSK or a quaternary binary phase shift keying (QBPSK) constellation, the BPSK constellation being different than the QBPSK constellation,

a second HE signal field, the second HE signal field to provide resource allocation information to the plurality of HE-STAs,

wherein the resource allocation information is configurable to indicate a plurality of resource units (RUs) within each of the plurality of 20 MHz channels,

the RUs configurable to have bandwidths less than 20 MHz to allow multiple RUs within each 20 MHZ channel,

wherein the one or more non-HE signal fields are configured to follow a short training field (L-STF) and a long training field (L-LTF) of the HE-PPDU;

obtaining a transmission opportunity (TXOP) for transmission of the HE-PPDU, the first HE signal field being duplicated for transmission on each 20 MHz channel, the second HE signal field being separately encoded for transmission on each 20 MHZ channel; and

causing the HE-AP to transmit, during the TXOP, downlink data to the HE-STAs within the plurality of RUs in accordance with multi-user multiple input multiple output (MU-MIMO), or

causing the HE-AP to receive, during the TXOP, uplink data from the HE-STAs within the plurality of RUs in accordance with orthogonal frequency division multiple access (OFDMA).

12. The method of claim 11 further comprising selecting the constellation of the second portion of the first HE signal field to signal whether the HE-PPDU is for multi-user operation.

13. The method of claim 11, further comprising configuring, based on an indication in one of the HE signal fields, the HE-AP to:

receive the uplink data from the HE-STAs in accordance with OFDMA, or transmit the downlink data to the HE-STAs in accordance with MU-MIMO.

14. A non-transitory computer-readable storage medium that stores instructions for execution by processing circuitry of a high-efficiency (HE) access point (HE-AP) to configure the HE-AP to perform operations communication with a plurality of HE stations (HE-STAs) using a plurality of 20 MHz channels,

the processing circuitry configured to:

encode an HE physical-layer protocol data unit (PPDU) (HE-PPDU), the HE-PPDU to include;

a plurality of signal fields including one or more non-HE signal fields and one or more HE signal fields, wherein the one or more HE signal fields include;

a first HE signal field comprising a first portion in accordance with a binary phase-shift keying (BPSK) constellation and a second portion in accordance with either a BPSK or a quaternary binary phase shift keying (QBPSK) constellation, the BPSK constellation being different than the QBPSK constellation, and

a second HE signal field, the second HE signal field to provide resource allocation information to the plurality of HE-STAs,

wherein the resource allocation information is configurable to indicate a plurality of resource units (RUs) within each of the plurality of 20 MHz channels, the RUs configurable to have bandwidths less than 20 MHz to allow multiple RUs within each 20 MHZ channel,

wherein the one or more non-HE signal fields are configured to follow a short training field (L-STF) and a long training field (L-LTF) of the HE-PPDU;

obtain a transmission opportunity (TXOP) for transmission of the HE-PPDU, the first HE signal field being duplicated for transmission on each 20 MHz channel, the second HE signal field being separately encoded for transmission on each 20 MHz channel; and

cause to transmit, during the TXOP, downlink data to the HE-STAs within the plurality of RUs in accordance with multi-user multiple input multiple output (MU-MIMO), or

cause to receive, during the TXOP, uplink data from the HE-STAs within the plurality of RUs in accordance with orthogonal frequency division multiple access (OFDMA).

15. The non-transitory computer-readable storage medium of claim 14 wherein the processing circuitry is configured to select the constellation of the second portion of the first HE signal field to signal whether the HE-PPDU is for multi-user operation.

16. The non-transitory computer-readable storage medium of claim 14, wherein, based on an indication in one of the HE signal fields, the processing circuitry is to configure the HE-AP to:

receive the uplink data from the HE-STAs in accordance with OFDMA, or transmit the downlink data to the HE-STAs in accordance with MU-MIMO.

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

processing circuitry; and

memory, the HE-STA configured for communication with an HE access point (HE-A), the processing circuitry configured to;

decode an HE physical-layer protocol data unit (PPDU) (HE-PPDU) received within a transmission opportunity (TXOP), the HE-PPDU to include;

a plurality of signal fields including one or more non-HE signal fields and one or more HE signal fields, wherein the one or more HE signal fields include;

a first HE signal field comprising a first portion in accordance with a binary phase-shift keying (BPSK) constellation and a second portion in accordance with either a BPSK or a quaternary binary phase shift keying (QBPSK) constellation, the BPSK constellation being different than the QBPSK constellation, and

a second HE signal field, the second HE signal field to provide resource allocation information to each of a plurality of HE-STAs,

wherein the resource allocation information is configurable to indicate a plurality of resource units (RUs) within each of the plurality of 20 MHz channels, the RUs configurable to have bandwidths less than 20 MHz to allow multiple RUs within each 20 MHZ channel,

wherein the one or more non-HE signal fields are configured to follow a short training field (L-STF) and a long training field (L-LTF) of the HE-PPDU, wherein the first HE signal field is duplicated on each 20 MHz channel and the second HE signal field is separately encoded on each 20 MHz channel; and

decode, during the TXOP, downlink data for the HE-STA within the RUs indicated to the HE-STA, the downlink data received in accordance with multi-user multiple input multiple output (MU-MIMO), or

encode for transmission, during the TXOP, uplink data from the HE-STA within the RUs indicated to the HE-STA, the uplink data transmitted in accordance with orthogonal frequency division multiple access (OFDMA).

18. The apparatus of claim 17 wherein the processing circuitry is configured to determine whether the HE-PPDU is for multi-user operation based on the constellation of the second portion of the first HE signal field.

19. The apparatus of claim 17, wherein, based on an indication in one of the HE signal fields, the processing circuitry is to configure the HE-STA to:

transmit the uplink data in accordance with OFDMA, or receive the downlink data in accordance with MU-MIMO.

20. The apparatus of 17, wherein the memory is configured to store the resource allocation information indicated for the HE-STA.