UL MU OFDMA trigger based peer-to-peer operation with UL MU MIMO

Patent metadata

Field	Value
Publication number	US-12425146-B2
Application number	US-202117557257-A
Country	US
Kind code	B2
Filing date	Dec 21, 2021
Priority date	Dec 21, 2021
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

An access point (AP) is configured for trigger-based peer-to-peer (TB P2P) operation with at least two peer stations (P2P1) and (P2P2) in which the AP (API) is operating as a coordinator. The AP may be configured to encode a trigger frame (AP TF) for transmission to reserve channel resources for two or more P2P transfers and identify times for each of the P2P transfers and may indicate an allocation of channel resources to a first of the peer stations (P2P1) for a first of the P2P transfers and to a second of the peer stations (P2P2) for a second of the P2P transfers. During the allocation for the first P2P transfer, the AP may decode a null data packet (NDP) frame for channel sounding received from the first peer station (P2P1). The AP may also encode a TB physical layer protocol data unit (PPDU) in accordance with a multi-user orthogonal frequency division multiple access (MU OFDMA) frame format a transmission to the first peer station (P2P1) in accordance with an uplink multi-user multiple-input multiple output (UL MU MIMO) technique.

First claim

What is claimed is:

1. An apparatus of an Extremely High Throughput (EHT) station (EHT STA), the apparatus comprising: processing circuitry; and memory,
wherein, when the EHT STA is operating as a first peer station for trigger-based peer-to-peer (P2P) operations with an EHT Access Point (EHT AP) and a second peer station, the processing circuitry is configured to:
decode a trigger frame received from the EHT AP, the trigger frame reserving channel resources for two or more P2P transfers,
the trigger frame indicating a time allocated to the first peer station for a first of the P2P transfers and a time allocated to the second peer station for a second of the P2P transfers, wherein the time allocated to the first peer station and the time allocated to the second peer station comprise time on a same channel;
wherein during the time allocated for the first of the P2P transfers, the processing circuitry is configured to:
encode a null data packet (NDP) frame for channel sounding for transmission;
encode a first trigger-based (TB) physical layer protocol data unit (PPDU) for transmission to the AP in accordance with a EHT multi-user (MU) PPDU format; and
encode a second TB PPDU for transmission to the second peer station in accordance with the EHT MU PPDU format,
wherein the first and second TB PPDUs comprise concurrent OFDMA-based transmissions in accordance with an uplink (UL) MU multiple-input multiple output (MIMO) technique,
wherein first channel state information reported by the EHT AP determined from the NDP frame is applied by the first peer station for transmission of the first TB PPDU to the EHT AP, and
wherein second channel state information reported by the second peer station determined from the NDP frame is applied by the first peer station for transmission of the second TB PPDU to the second peer station.

2. The apparatus of claim 1 , wherein during the time allocated for the second of the P2P transfers, the processing circuitry is configured to:
decode a second NDP frame for channel sounding received from the second peer station; and
decode a third TB PPDU received from the second peer station, the third TB PPDU configured in accordance with the EHT MU PPDU format.

3. The apparatus of claim 2 , wherein a fourth TB PPDU is transmitted during the time allocated for the second of the P2P transfers from the second peer station to the EHT AP concurrently with the third TB PPDU.

4. The apparatus of claim 3 , wherein the EHT STA is a non-AP STA, and
wherein the third TB PPDU and the fourth TB PPDU comprise concurrent OFDMA-based transmissions in accordance with the UL MU MIMO technique.

5. The apparatus of claim 4 , wherein during the time allocated for the first of the P2P transfers after transmission of the concurrent transmission of the first and second TB PPDUs, the processing circuitry is configured to encode scheduling feedback for transmission to the EHT AP, the scheduling feedback indicating whether the first peer station has additional data to send.

6. The apparatus of claim 5 , wherein during the time allocated for the second of the P2P transfers after reception of the third TB PPDU,
the second peer station is configured to transmit scheduling feedback to the AP indicating whether the second peer station has data to send.

7. The apparatus of claim 4 , wherein the trigger frame further indicates a time allocated to a third peer station for a third of the P2P transfers,
wherein during the time allocated for the third of the P2P transfers, the processing circuitry is configured to:
decode a third NDP frame for channel sounding received from the third peer station; and
decode a fifth TB PPDU received from the third peer station, the fifth TB PPDU configured in accordance with the EHT MU PPDU format.

8. The apparatus of claim 7 , wherein a fifth TB PPDU is transmitted during the time allocated for the third of the P2P transfers from the third peer station to the EHT AP concurrently with the fifth TB PPDU.

9. The apparatus of claim 1 , wherein the processing circuitry is configured to append an NDP extension (NE) to the NDP frame, the NE comprising additional symbols for channel sounding in a P-matrix format.

10. A non-transitory computer-readable storage medium that stores instructions for execution by processing circuitry of an Extremely High Throughput (EHT) station (EHT STA),
wherein, when the EHT STA is operating as a first peer station for trigger-based peer-to-peer (P2P) operations with an EHT Access Point (EHT AP) and a second peer station, the processing circuitry is configured to:
decode a trigger frame received from the EHT AP, the trigger frame reserving channel resources for two or more P2P transfers,
the trigger frame indicating a time allocated to the first peer station for a first of the P2P transfers and a time allocated to the second peer station for a second of the P2P transfers, wherein the time allocated to the first peer station and the time allocated to the second peer station comprise time on a same channel;
wherein during the time allocated for the first of the P2P transfers, the processing circuitry is configured to:
encode a null data packet (NDP) frame for channel sounding for transmission;
encode a first trigger-based (TB) physical layer protocol data unit (PPDU) for transmission to the AP in accordance with a EHT multi-user (MU) PPDU format; and
encode a second TB PPDU for transmission to the second peer station in accordance with the EHT MU PPDU format,
wherein the first and second TB PPDUs comprise concurrent OFDMA-based transmissions in accordance with an uplink (UL) MU multiple-input multiple output (MIMO) technique,
wherein first channel state information reported by the EHT AP determined from the NDP frame is applied by the first peer station for transmission of the first TB PPDU to the EHT AP, and
wherein second channel state information reported by the second peer station determined from the NDP frame is applied by the first peer station for transmission of the second TB PPDU to the second peer station.

11. The non-transitory computer-readable storage medium of claim 10 , wherein during the time allocated for the second of the P2P transfers, the processing circuitry is configured to:
decode a second NDP frame for channel sounding received from the second peer station; and
decode a third TB PPDU received from the second peer station, the third TB PPDU configured in accordance with the EHT MU PPDU format.

12. The non-transitory computer-readable storage medium of claim 11 , wherein a fourth TB PPDU is transmitted during the time allocated for the second of the P2P transfers from the second peer station to the EHT AP concurrently with the third TB PPDU.

13. The non-transitory computer-readable storage medium of claim 12 , wherein the EHT STA is a non-AP STA, and
wherein the third TB PPDU and the fourth TB PPDU comprise concurrent OFDMA-based transmissions in accordance with the UL MU MIMO technique.

14. The non-transitory computer-readable storage medium of claim 13 , wherein during the time allocated for the first of the P2P transfers after transmission of the concurrent transmission of the first and second TB PPDUs, the processing circuitry is configured to encode scheduling feedback for transmission to the EHT AP, the scheduling feedback indicating whether the first peer station has additional data to send.

15. The non-transitory computer-readable storage medium of claim 14 , wherein during the time allocated for the second of the P2P transfers after reception of the third TB PPDU,
the second peer station is configured to transmit sch

Assignees

• Intel Corp

Inventors

• Segev Yonathan
• Li Qinghua
• Chen Xiaogang
• Hareuveni Ofer
• Birnbaum David

Classifications

• H04W92/20

  between access points · CPC title

• H04B7/0452 Primary

  Multi-user MIMO systems · CPC title

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04B7/0626

  Channel coefficients, e.g. channel state information [CSI] · CPC title