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US-20260129682-A1 - COLLISION DETECTION AND MANAGEMENT IN P-EDCA

US20260129682A1US 20260129682 A1US20260129682 A1US 20260129682A1US-20260129682-A1

Abstract

An access point (AP) includes a transceiver, and a processor operably coupled to the transceiver. The processor is configured to detect, when starting a prioritized enhanced distributed channel access (P-EDCA), collision of one or more defer signal (DS) transmissions from a plurality stations (STAs), or detect, during a P-EDCA contention period, collision of frames initiating transmissions from the plurality of STAs. The processor is also configured to, in response to detection of collision of the one or more DS transmission, or collision of the frames initiating the transmission from the plurality of STAs, cause the transceiver to transmit, within the P-EDCA contention period, an additional DS for the AP to manage contention of multiple frame transmissions among the plurality of STAs. The format of the DS and its operating bandwidth are revealed.

Inventors

  • Yue Qi
  • Rubayet Shafin
  • Peshal Nayak
  • Vishnu Vardhan Ratnam
  • Boon Loong Ng
  • Bilal Sadiq

Assignees

  • SAMSUNG ELECTRONICS CO., LTD.

Dates

Publication Date
20260507
Application Date
20251015

Claims (20)

  1. 1 . An access point (AP) comprising: a transceiver; and a processor operably coupled to the transceiver, the processor configured to: detect, when starting a prioritized enhanced distributed channel access (P-EDCA), collision of one or more defer signal (DS) transmissions from a plurality of stations (STAs), or detect, during a P-EDCA contention period, collision of frames initiating transmissions from the plurality of STAs; and in response to detection of collision of the one or more DS transmissions, or collision of the frames initiating the transmissions from the plurality of STAs, cause the transceiver to transmit, within the P-EDCA contention period, an additional DS for the AP to manage contention of multiple frame transmissions among the plurality of STAs.
  2. 2 . The AP of claim 1 , wherein each of the DS transmissions from the plurality of STAs and the additional DS has a non-high throughput (non-HT) duplicate physical layer protocol data unit (PPDU) format.
  3. 3 . The AP of claim 1 , wherein the frames initiating transmissions from the plurality of STAs during the P-EDCA by are control frames.
  4. 4 . The AP of claim 1 , wherein each of the DS transmissions or the frames initiating the transmissions from the plurality of STAs and the additional DS is transmitted on a same channel of a basic service set (BSS).
  5. 5 . The AP of claim 4 , wherein the channel of the BSS is a primary channel of the BSS.
  6. 6 . The AP of claim 4 , wherein: the channel of the BSS is one of an off-channel or a base-channel; and the transceiver is configured to, prior to transmission of the DS transmissions and the frames initiating the transmissions from the plurality of STAs, transmit at least one of a beacon or probe response frame indicating the off-channel and the base-channel.
  7. 7 . The AP of claim 1 , wherein the additional DS includes a Receiver Address (RA) field set to one of clear to send (CTS)-to self or a special value.
  8. 8 . The AP of claim 1 , wherein: each of the DS transmissions from the plurality of STAs includes an attempt counter; and the AP is configured to detect a number of potential collisions of the DS transmissions or the frames initiating the transmissions from the plurality of STAs.
  9. 9 . The AP of claim 1 , wherein: each of the DS transmissions from the plurality of STAs includes an intermediate frame check sequence field (iFCS) field; and the AP is configured to detect collision of the DS transmissions or the frames initiating the transmissions from the plurality of STAs when multiple DSs among the DS transmissions from the plurality of STAs have matching fields and mismatched iFCS values.
  10. 10 . The AP of claim 1 , wherein during transmission of the additional DS, the AP contends with another AP to manage the contention of DS transmissions among the plurality of STAs.
  11. 11 . The AP of claim 1 , wherein the transceiver is configured to, prior to transmission of the DS transmissions by the plurality of STAs, transmit a reference timing to align transmission of the DS transmissions from the plurality of STAs.
  12. 12 . A station (STA) comprising: a processor; and a transceiver operably coupled to the processor, the transceiver configured to: transmit, during a start of a prioritized enhanced distributed channel access (P-EDCA), a first defer signal (DS), or transmit, during a P-EDCA contention period, a frame initiating transmissions from the STA; and receive from an access point (AP), within the P-EDCA contention period, a second DS for the AP to manage contention of frame transmissions including the DS or the frame initiating the transmissions by the STA.
  13. 13 . The STA of claim 12 , wherein the first and the second DS have a non-high throughput (non-HT) duplicate physical layer protocol data unit (PPDU) format.
  14. 14 . The STA of claim 12 , wherein the frame initiating transmissions from the STA during the P-EDCA is a control frame.
  15. 15 . The STA of claim 12 , wherein the first and the second DS are transmitted on a same channel of a basic service set (BSS).
  16. 16 . The STA of claim 15 , wherein the channel of the BSS is a primary channel of the BSS.
  17. 17 . The STA of claim 15 , wherein: the channel of the BSS is one of an off-channel or a base-channel; and the transceiver is configured to, prior to transmission of the first DS and the frame initiating the transmissions from the STA, receive at least one of a beacon or probe response frame indicating the off-channel and the base-channel.
  18. 18 . The STA of claim 12 , wherein the second DS includes a Receiver Address (RA) field set to one of clear to send (CTS)-to self or a special value.
  19. 19 . The STA of claim 12 , wherein the first DS includes at least one of an attempt counter and an intermediate frame check sequence field (iFCS) field.
  20. 20 . The STA of claim 12 , wherein the transceiver is configured to, prior to transmission of the first DS, receive a reference timing to align transmission of the first DS.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) AND CLAIM OF PRIORITY This application claims priority under 35 U.S.C. § 119 (e) to U.S. Provisional Patent Application No. 63/715,395 filed on Nov. 1, 2024, U.S. Provisional Patent Application No. 63/717,527 filed on Nov. 7, 2024, U.S. Provisional Patent Application No. 63/724,168 filed on Nov. 22, 2024, U.S. Provisional Patent Application No. 63/738,239 filed on Dec. 23, 2024, U.S. Provisional Patent Application No. 63/770,661 filed on Mar. 12, 2025, and U.S. Provisional Patent Application No. 63/800,848 filed on May 6, 2025. The above-identified provisional patent applications are hereby incorporated by reference in their entirety. TECHNICAL FIELD This disclosure relates generally to wireless networks. More specifically, this disclosure relates to enhanced distributed channel access (EDCA) enhancement in multi-basic service set (BSS). BACKGROUND Wireless Local Area Network (WLAN) technology allows devices to access the internet in the 2.4 GHz, 5 GHZ, 6 GHz or 60 GHz frequency bands. WLANs are based on the Institute of Electrical and Electronic Engineers (IEEE) 802.11 standards. The IEEE 802.11 family of standards aim to increase speed and reliability and to extend the operating range of wireless networks. The demand of wireless data traffic is rapidly increasing due to the growing popularity among consumers and businesses of smart phones and other mobile data devices, such as tablets, “note pad” computers, net books, eBook readers, and machine type of devices. In order to address the issue of increasing bandwidth requirements that are demanded for wireless communications systems, different schemes are being developed to allow multiple user terminals to communicate with a single access point by sharing the channel resources while achieving high data throughputs. Multiple Input Multiple Output (MIMO) technology represents one such approach that has emerged as a popular technique. MIMO has been adopted in several wireless communications standards such 802.11ac, 802.11ax etc. SUMMARY This disclosure provides apparatuses and methods for EDCA enhancement in multi-BSS. In one embodiment, an access point (AP) is provided. The AP includes a transceiver, and a processor operably coupled to the transceiver. The processor is configured to detect, when starting a prioritized enhanced distributed channel access (P-EDCA), collision of one or more defer signal (DS) transmissions from a plurality of stations (STAs), or detect, during a P-EDCA contention period, collision of frames initiating transmissions from the plurality of STAs. The processor is also configured to, in response to detection of collision of the one or more DS transmission, or collision of the frames initiating the transmission from the plurality of STAs, cause the transceiver to transmit, within the P-EDCA contention period, an additional DS for the AP to manage contention of multiple frame transmissions among the plurality of STAs. In another embodiment, a STA is provided. The STA includes a processor, and a transceiver operably coupled to the processor. The transceiver is configured to transmit, during a start of a P-EDCA, a first DS, or transmit, during a P-EDCA contention period, a frame initiating transmissions from the STA. The transceiver is also configured to receive, from an AP, within the P-EDCA contention period, a second DS for the AP to manage contention of frame transmissions including the DS or the frame initiating the transmissions by the STA. Other technical features may be readily apparent to one skilled in the art from the following figures, descriptions, and claims. Before undertaking the DETAILED DESCRIPTION below, it may be advantageous to set forth definitions of certain words and phrases used throughout this patent document. The term “couple” and its derivatives refer to any direct or indirect communication between two or more elements, whether or not those elements are in physical contact with one another. The terms “transmit,” “receive,” and “communicate,” as well as derivatives thereof, encompass both direct and indirect communication. The terms “include” and “comprise,” as well as derivatives thereof, mean inclusion without limitation. The term “or” is inclusive, meaning and/or. The phrase “associated with,” as well as derivatives thereof, means to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to or with, have, have a property of, have a relationship to or with, or the like. The term “controller” means any device, system or part thereof that controls at least one operation. Such a controller may be implemented in hardware or a combination of hardware and software and/or firmware. The functionality associated with any particular controller may be centralized or distributed, whether locally or remotely. The phrase “at least one of