Request trigger frame and TXOP sharing launched by non-AP STA

Patent metadata

Field	Value
Publication number	US-12414156-B2
Application number	US-202117228214-A
Country	US
Kind code	B2
Filing date	Apr 12, 2021
Priority date	Aug 17, 2020
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

A wireless communication apparatus, system or method for operation on a network utilizing CSMA/CA, in which non-AP stations can share their TXOP. After obtaining a TXOP, a non-AP station informs the AP to share the TXOP within its BSS. The AP collects buffer status and the QoS requirements of the buffer from the stations and arranges transmissions during the shared TXOP to satisfy the QoS requirement of the buffer reported by the STAs. The non-AP station can also share its TXOP through the AP using trigger frames or other mechanisms. The AP station may be part of a multi-link device and the AP can arrange transmissions on multiple links of an MLD.

First claim

What is claimed is:

1. An apparatus for wireless communication in a network as a station, comprising:
(a) wherein the station is configured for wirelessly communicating with other stations on a network using Carrier-Sense Multiple-Access Collision Avoidance (CSMA/CA);
(b) a processor within said station; and
(c) a non-transitory memory storing instructions executable by the processor;
(d) wherein said instructions, when executed by the processor, perform a communications protocol, in which the station is operating as either an Access Point (AP) of a basic-service-set (BSS), or a first non-AP station within non-AP stations operating on the BSS, and wherein a transmit opportunity (TXOP) obtained by the first non-AP station is shared with one or more non-AP stations on the network through using the AP, by performing steps comprising:
(i) receiving messaging at the AP from the first non-AP station that has obtained the TXOP, with said messaging informing the AP on sharing the TXOP within the BSS; wherein said messaging is prefixed with content carrying duplicate information about sharing the TXOP, toward eliminating communication errors, when the AP processes the information on TXOP sharing;
(ii) receiving a buffer status report (BSR) including Quality-of-Service (QoS) requirements from non-AP stations operating on the BSS indicating the requirements of its respective buffer; and
(iii) wherein the station operating as the AP performs as TXOP holder instead of the first non-AP station that has obtained the TXOP during the shared TXOP, to satisfy the QoS requirements of the respective buffer as reported by non-AP stations operating on the BSS.

2. The apparatus of claim 1 , wherein the preamble of the messaging from the first non-AP station on sharing its TXOP contains information for indicating TXOP sharing and payload carrying buffer status; wherein this information has been prefixed by a previous negotiation containing identical information on TXOP sharing and payload carrying buffer status as transmitted through a random resource unit (RU).

3. The apparatus of claim 1 , wherein the first non-AP station prior to sharing its TXOP sends a frame to the AP, whose receiver address is prefixed and negotiated, to indicate TXOP sharing and thus allowing the AP to determine which station is to obtain and share the TXOP within the BSS.

4. The apparatus of claim 1 , wherein the first non-AP station sharing its TXOP sends a buffer status report (BSR) frame to the AP to indicate TXOP sharing and allowing the AP to become the TXOP holder by sending a Clear-to-Send (CTS) frame to the AP to indicate TXOP sharing and allowing the AP station to become the TXOP holder.

5. The apparatus of claim 1 , wherein the AP in collecting buffer status from non-AP stations operating on the BSS, sends a buffer status report poll (BSRP) trigger frame to request buffer status and QoS requirements from each of the one or more non-AP stations operating on the BSS, regarding its respective buffer.

6. The apparatus of claim 1 , wherein buffer status being reported to the AP uses different types of buffer status report (BSR) frames, which are either for peer-to-peer transmissions or real time application transmissions, to report its buffer status and the QoS requirements.

7. The apparatus of claim 6 , wherein buffer status being reported for the real time application transmissions to the AP contains an expiration time of buffered traffic.

8. The apparatus of claim 6 , wherein buffer status being reported for peer-to-peer transmission to the AP contains information on the buffer used for peer-to-peer transmissions.

9. The apparatus of claim 1 , wherein the AP is configured for arranging the transmissions during the shared TXOP by allocating a portion of the channel time for peer-to-peer transmissions.

10. The apparatus of claim 1 , wherein the AP is configured for arranging the transmissions by taking over the TXOP and acting as TXOP holder during the shared TXOP and then for arranging a multi-user transmission including downlink transmissions and any peer-to-peer transmissions.

11. The apparatus of claim 1 , wherein the AP is configured for arranging the transmissions by taking over the TXOP and acting as TXOP holder during the shared TXOP and then for arranging a multi-user transmission including uplink transmissions and any peer-to-peer transmissions.

12. The apparatus of claim 1 , wherein said apparatus supports latency requirements of real time application (RTA) traffic, which is packetized as RTA packets when transmitted, within the network in which RTA packets and non-RTA packets coexist.

13. The apparatus of claim 1 , wherein to support the QoS requirements of the respective buffer, the AP, which is performing as the TXOP holder, arranges transmissions thus ordering and scheduling transmissions during the shared TXOP.

14. The apparatus of claim 13 , wherein said transmissions being arranged comprise transmissions between non-AP stations, as peer-to-peer (P2P) transmissions, performed during the shared TXOP, and wherein a BSR for ordering P2P transmissions reports the buffer for P2P traffic which includes a P2P receiver identification.

15. The apparatus of claim 13 :
wherein said transmissions being arranged comprises a transmission that has latency requirements of real time application (RTA) traffic which is packetized as RTA packets when transmitted, within the network in which RTA packets and non-RTA packets coexist, and in which an RTA identification (RTA ID) is used to identify the RTA traffic;
wherein said BSR for RTA traffic comprises an RTA ID to which each QoS requirement of RTA traffic under the same traffic specification is linked, and parameters for the RTA traffic including expiration time; and
wherein said TXOP sharing considers time-validity of RTA traffic and minimizes RTA packet latency in a wireless network where RTA and non-RTA traffic coexist.

16. An apparatus for wireless communication in a network as a station, comprising:
(a) wherein the station is configured for wirelessly communicating with other stations on a network using Carrier-Sense Multiple-Access Collision Avoidance (CSMA/CA);
(b) a processor within said station; and
(c) a non-transitory memory storing instructions executable by the processor;
(d) wherein said instructions, when executed by the processor, perform a communications protocol, in which the station is operating as either an Access Point (AP) of a basic-service-set (BSS) or a first non-AP station within non-AP stations operating on the BSS, and wherein a transmit opportunity (TXOP) obtained by the first non-AP station is shared with one or more of the non-AP stations on the network through using the AP, by performing steps comprising:
(i) receiving messaging at the AP from the first non-AP station that has obtained the TXOP, with said messaging informing the AP on sharing the TXOP within the BSS;
(ii) wherein the first non-AP station prior to sharing its TXOP sends a frame to the AP, whose receiver address is prefixed and negotiated, to indicate TXOP sharing and thus allowing the AP to determine which station is to obtain and share the TXOP within the BSS;
(iii) receiving a buffer status report (BSR) including Quality-of-Service (QoS) requirements from non-AP stations operating on the BSS indicating the requirements of its respective buffer, by the station operating as an Access Point (AP) station; and
(iv) wherein the AP performs as TXOP holder instead of the first non-AP station that has obtained the TXOP during the shared TXOP, to satisfy the QoS requirements of the respective buff

Assignees

• Sony Group Corp

Inventors

• Xin Liangxiao
• Abouelseoud Mohamed

Classifications

• H04W28/0268 Primary

  using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] (negotiating SLA or negotiating QoS H04W28/24) · CPC title

• H04W28/0278

  using buffer status reports (dynamic wireless traffic scheduling definition H04W72/12) · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04L1/0008

  by supplementing frame payload, e.g. with padding bits · CPC title

• H04W28/24

  Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service] · CPC title