Link adaptation control for extremely high throughput systems

Patent metadata

Field	Value
Publication number	US-11764836-B2
Application number	US-202117506050-A
Country	US
Kind code	B2
Filing date	Oct 20, 2021
Priority date	Oct 20, 2021
Publication date	Sep 19, 2023
Grant date	Sep 19, 2023

Abstract

The application relates to link adaptation for extremely high throughput (EHT) systems. Various approaches are provided to enable transmission of link adaptation parameters for single-user multiple input multiple output (SU-MIMO), and multi-user multiple input multiple output MU-MIMO. In some embodiments, two control IDs in the A-control subfield are used, one for SU-MIMO and one for MU-MIMO. These can both be reserved control IDs, or a combination of a reserved control ID and control ID 2 normally used for HE link adaptation. In some embodiments, a single control ID in the A-control subfield is used. This can be a reserved control ID or control ID 2 normally used for HE link adaptation.

First claim

The invention claimed is:

1. A method comprising:
communicating, by a wireless communication device, a medium access control (MAC) frame comprising a MAC header, frame body and frame check sequence;
the MAC header comprising:
a high throughput (HT) control sub-field, the HT control sub-field containing a control ID value and control information;
wherein when the control ID value is set to a first value, the control information is extremely high throughput (EHT) link adaptation parameters for EHT communication for single user-multiple input multiple output (SU-MIMO), the link adaptation parameters for EHT for SU-MIMO comprising a first parameter that indicates a recommended number of spatial streams for SU-MIMO and a second parameter that indicates a recommended modulation and coding scheme (MCS) for SU-MIMO;
wherein when the control ID value is set to a second value, the control information is EHT link adaptation parameters for EHT communication for multi-user-multiple input multiple output (MU-MIMO);
the link adaptation parameters for EHT for MU-MIMO comprising a first parameter that indicates a recommended number of spatial streams for MU-MIMO and a second parameter that indicates a recommended MCS for MU-MIMO.

2. The method of claim 1 wherein the first value is one of 9, 11, 12, 13, 14 and the second value is a different one of 9, 11, 12, 13, 14.

3. The method of claim 1 wherein the first value is 2 and the second value is one of 9, 11, 12, 13, 14, wherein when the first value is 2, the method further comprises communicating an indication at a physical layer that the MAC frame is a frame of the EHT protocol.

4. The method of claim 1 wherein communicating comprises transmitting by an access point (AP).

5. The method of claim 1 wherein communicating comprises receiving by an access point.

6. The method of claim 1 wherein communicating comprises transmitting by a non-access point (AP) station (STA).

7. The method of claim 1 wherein communicating comprises receiving by a non-AP station (STA).

8. The method of claim 1 wherein the HT control sub-field comprises a high efficiency (HE) variant HT control field, the HE variant HT control field including an A-control subfield, wherein the A-control subfield contains said control ID and said control information.

9. A method comprising:
communicating, by a wireless communication device, a medium access control (MAC) frame comprising a MAC header, frame body and frame check sequence;
the MAC header comprising:
a high throughput (HT) control sub-field, the HT control sub-field containing a control ID value and control information;
wherein when the control ID value is set to a first value, in a case where the MAC frame is a frame of an extremely high throughput (EHT) protocol, the control information contains EHT link adaptation parameters for EHT communication, and the control information contains a single user/multiple user-multiple input multiple output (SU/MU-MIMO) indication of whether the control information is for single user-multiple input multiple output (SU-MIMO) or for multiple user-multiple input multiple output (MU-MIMO);
wherein when the control ID value is set to the first value, in a case where the MAC frame is a frame of a high efficiency (HE) protocol, the control information contains HE link adaptation parameters for HE communication;
wherein the first value is 2.

10. The method of claim 9 wherein:
the control information includes a bandwidth sub-field indicating a recommended bandwidth, and an resource unit (RU) allocation/(partial RU allocation, SU/MU-MIMO indication) subfield defined as follows:
when the recommended physical layer protocol data unit (PPDU) bandwidth is larger than 20 MHz, an resource unit (RU) allocation/(partial RU allocation, SU/MU-MIMO indication) subfield containing only RU allocation;
when the recommended PPDU bandwidth equals 20 MHz, an resource unit (RU) allocation/(partial RU allocation, SU/MU-MIMO indication) subfield containing a partial RU allocation and the SU/MU-MIMO indication.

11. The method of claim 9 wherein:
the control information includes an unsolicited modulation and coding scheme feedback (MFB) sub-field, a bandwidth sub-field indicating a recommended physical layer protocol data unit (PPDU) bandwidth, and a modulation and coding scheme Request Sequence Identifier (MSI)/PPDU Format, Coding Type)/(PPDU Format, SU/MU-MIMO indication) subfield defined as follows:
when the unsolicited MFB sub-field is 0, MSI/(PPDU Format, Coding Type)/(PPDU Format, SU/MU-MIMO indication) containing MSI;
when the unsolicited MFB sub-field is 1 and the recommended PPDU bandwidth is 20 MHz, the MSI/(PPDU Format, Coding Type)/(PPDU Format, SU/MU-MIMO indication) containing PPDU format and coding type;
when the unsolicited MFB sub-field is 1 and the recommended PPDU bandwidth when the unsolicited MFB sub-field is 1 and the recommended PPDU bandwidth is >20 MHz, the MSI/(PPDU Format, Coding Type)/(PPDU Format, SU/MU-MIMO indication) containing PPDU format and the SU/MU-MIMO indication.

12. The method of claim 9 , the method further comprising in the case that the MAC frame is a frame of the HE protocol communicating an indication at a physical layer that the MAC frame is a frame of the HE protocol and in the case that the MAC frame is a frame of the EHT protocol communicating an indication at the physical layer that the MAC frame is a frame of the EHT protocol.

13. The method of claim 9 wherein communicating comprises receiving by a non-AP station (STA).

14. A method comprising:
communicating, by a wireless communication device, a medium access control (MAC) frame comprising a MAC header, frame body and frame check sequence;
the MAC header comprising:
a high throughput (HT) control sub-field, the HT control sub-field containing a control ID value and control information;
wherein when the control ID value is set to a first value, the control information contains EHT link adaptation parameters for EHT communication, and the control information contains a single user/multiple user-multiple input multiple output (SU/MU-MIMO) indication of whether the control information is for single user-multiple input multiple output (SU-MIMO) or for multiple user-multiple input multiple output (MU-MIMO);
wherein communicating comprises transmitting by an access point (AP).

15. A method comprising:
communicating, by a wireless communication device, a medium access control (MAC) frame comprising a MAC header, frame body and frame check sequence;
the MAC header comprising:
a high throughput (HT) control sub-field, the HT control sub-field containing a control ID value and control information;
wherein when the control ID value is set to a first value, the control information contains EHT link adaptation parameters for EHT communication, and the control information contains a single user/multiple user-multiple input multiple output (SU/MU-MIMO) indication of whether the control information is for single user-multiple input multiple output (SU-MIMO) or for multiple user-multiple input multiple output (MU-MIMO);
wherein communicating comprises receiving by an access point.

16. A method comprising:
communicating, by a wireless communication device, a medium access control (MAC) frame comprising a MAC header, frame body and frame check sequence;
the MAC header comprising:
a high throughput (HT) control sub-field, the HT control sub-field containing a control ID value and control information;
wherein when the control ID value is set to a first value, the control information contains EHT link adaptation par

Assignees

• Xin Yan
• Suh Jung Hoon
• Aboul Magd Osama
• Au Kwok Shum
• Huawei Tech Co Ltd

Inventors

• Xin Yan
• Suh Jung Hoon
• Aboul-Magd Osama
• Au Kwok Shum

Classifications

• H04L1/0023

  characterised by the signalling · CPC title

• H04W88/08

  Access point devices · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04L1/0003

  by switching between different modulation schemes · CPC title

• H04B7/0452 Primary

  Multi-user MIMO systems · CPC title