公开(公告)号：US12238776B2

公开(公告)日：2025-02-25

申请号：US18515011

申请日：2023-11-20

Applicant: CANON KABUSHIKI KAISHA

Inventor： Stéphane Baron ,  Romain Guignard ,  Pascal Viger ,  Patrice Nezou

IPC: H04W74/0816 ,  H04W72/566 ,  H04W84/12

Abstract: In 802.11ax networks with access points, a trigger frame offers scheduled and random resource units to nodes for data uplink communication to the access points. To make more effective the usage of the network, the access point may design the trigger frame to force the nodes to send some categories of data. Resource units may be defined in trigger frames to be dedicated to small packets or to some access category data. Adjusting the time length of the resource units helps restricting the type of data that can be conveyed by the resource units. Also, using various frequency widths for resource units in the same trigger frame helps reducing padding in the resource units when various traffic types coexist.

公开(公告)号：US12177908B2

公开(公告)日：2024-12-24

申请号：US17619191

申请日：2020-06-19

Applicant: CANON KABUSHIKI KAISHA

Inventor： Pascal Viger ,  Stéphane Baron ,  Patrice Nezou

IPC: H04W74/0833 ,  H04L5/00

Abstract: The invention provides a random access mechanism for short feedback procedure. An AP provides a random-access NFRP trigger frame defining a random access for the stations to a plurality of RU tone sets. A non-AP station randomly selects a responding RU tone set from the plurality of RU tone sets and send a NDP feedback report response on the selected responding RU tone set. A dedicated backoff counter may be used for the purposes of contention to the random RU tone sets. A subsequent UL MU transmission can then be scheduled by the AP for the NDP responding stations. No unused RU is expected, improving the random-access network efficiency. Also, the number of non-AP stations that can be targeted by the random-access NFRP trigger frame can be easily increased.

公开(公告)号：US12108451B2

公开(公告)日：2024-10-01

申请号：US17675896

申请日：2022-02-18

Applicant: CANON KABUSHIKI KAISHA

Inventor： Julien Sevin ,  Pascal Viger ,  Patrice Nezou ,  Stéphane Baron

IPC: H04W74/08 ,  H04L5/00 ,  H04W74/00 ,  H04W74/0816 ,  H04W84/12

CPC classification number: H04W74/0816 ,  H04L5/001 ,  H04L5/0037 ,  H04W74/006 ,  H04W84/12

Abstract: The invention provides multi-user communication in a MU Uplink transmission opportunity in case of a multi-BSS environment of a wireless network. Resource units with AID=0 or 2045 are available for stations to transmit data to addressee virtual access points (VAPs) other than the VAP having initiated the TXOP. The initiating VAP receiving frames from the resources forwards them to the appropriate addressee VAPs within the same physical AP. Responses may be provided by the addressee VAPs directly to the stations or via the initiating VAP or the representative VAP. This approach increases the opportunities for the stations to access the medium in case of multiple BSSs. Better usage of the MU Uplink OFDMA transmission is also made.

公开(公告)号：US12048001B2

公开(公告)日：2024-07-23

申请号：US17436967

申请日：2020-03-06

Applicant: CANON KABUSHIKI KAISHA

Inventor： Pascal Viger ,  Stéphane Baron ,  Patrice Nezou

IPC: H04W74/08 ,  H04L47/50 ,  H04L49/90

CPC classification number: H04W74/08 ,  H04L47/50 ,  H04L49/90

Abstract: A communication method in a communication device includes storing a first type of data and a second type of data belonging to a same access category defined by IEEE802.11 series, contending for access according to an enhanced distributed channel access, EDCA, using first EDCA parameters, to a communication channel in order to transmit the first type of data to another communication device; and contending for access according to the EDCA, using second EDCA parameters different from the first EDCA parameters, to the communication channel in order to transmit the second type of data to the other communication device.

公开(公告)号：US11844081B2

公开(公告)日：2023-12-12

申请号：US17384186

申请日：2021-07-23

Applicant: CANON KABUSHIKI KAISHA

Inventor： Patrice Nezou ,  Stéphane Baron ,  Pascal Viger

IPC: H04L5/00 ,  H04W72/21 ,  H04L1/1607 ,  H04W74/08

CPC classification number: H04W72/21 ,  H04L1/1685 ,  H04L5/0094 ,  H04W74/0833

Abstract: The present invention provides a new trigger frame dedicated to NDP feedback procedure. This NDP feedback trigger frame comprises a specific field allowing stations (non-AP nodes) receiving this trigger frame to identify it as being a dedicated NDP feedback trigger frame. Thanks to this specific field, a receiving station knows that a NDP feedback procedure has started and that a NDP feedback is expected by the access point. The present invention also provides for communication methods using this NDP feedback trigger frame, communication device station and access point configured to implement these methods, and also a wireless communication network comprising such devices.

公开(公告)号：US11665676B2

公开(公告)日：2023-05-30

申请号：US17816971

申请日：2022-08-02

Applicant: CANON KABUSHIKI KAISHA

Inventor： Patrice Nezou ,  Pascal Viger ,  Stéphane Baron ,  Julien Sevin

IPC: H04W72/04 ,  H04W72/12 ,  H04W74/08 ,  H04W84/12 ,  H04W72/0446 ,  H04W72/21 ,  H04W72/23 ,  H04W72/50

CPC classification number: H04W72/0446 ,  H04W72/21 ,  H04W72/23 ,  H04W72/535 ,  H04W74/0816 ,  H04W84/12

Abstract: The invention relates to improve use of resource units in MU transmissions of an 802.11ax network. An un-associated station may receive data frames over a downlink resource unit, RU, assigned to an AID, e.g. 2045, reserved for stations not associated with the AP, The AP may use a downlink RU sharing an allocation scheme feature of an uplink RU previously used by the un-associated station. The AP may also aggregated data frames addressed to several stations within the same downlink RU, for instance to acknowledge frames previously received from the stations. The aggregated data frames may signal which respective response RUs the addressee stations should use for a next multi-user uplink transmission to respond to the AP. These approaches particularly applies to the exchange of management frames for instance to speed up the association procedure of un-associated stations.

公开(公告)号：US11382134B2

公开(公告)日：2022-07-05

申请号：US16081399

申请日：2017-03-08

Applicant: CANON KABUSHIKI KAISHA

Inventor： Pascal Viger ,  Stéphane Baron ,  Patrice Nezou

IPC: H04W74/08 ,  H04W72/04 ,  H04W72/12

Abstract: A physical AP manages a plurality of BSSs through VAPs. The AP sends a trigger frame to reserve a TXOP including resource units the nodes access to transmit data during the reserved TXOP. To improve channel utilization, the trigger frame identifies a plurality of groups, nodes of which are allowed to access the resources units to transmit data during the reserved TXOP. Thus, the AP receives, during the reserved TXOP, data from one node of a first group identified in the trigger frame and data from one node (separate from the first one) of a second and separate group identified in the trigger frame. A single access by the AP to the medium is thus required, reducing the channel occupation due to control frames. In some embodiments, the number of trigger frames can be drastically reduce, while offering resource units to several BSSs.

公开(公告)号：US11039476B2

公开(公告)日：2021-06-15

申请号：US16847103

申请日：2020-04-13

Applicant: CANON KABUSHIKI KAISHA

Inventor： Patrice Nezou ,  Stéphane Baron ,  Romain Guignard ,  Pascal Viger

IPC: H04W74/08 ,  H04W74/00 ,  H04L5/00 ,  H04W84/12

Abstract: In an 802.11ax network with an access point, a trigger frame offers random resource units to nodes for data uplink communication to the access point. To dynamically adapt the contention mechanism used by the nodes to access the random resource units, the AP updates a correcting TBD parameter at each new TXOP and includes the updated adjusting parameter in the trigger frame for the next TXOP. The nodes use the TBD parameter to generate a local random RU backoff value from a contention window range, for contending for access to the random resource units. The TBD parameter may directly impact the contention window size CWO or boundaries values of a selection range from which CWO is selected.

公开(公告)号：US12160392B2

公开(公告)日：2024-12-03

申请号：US18053994

申请日：2022-11-09

Applicant: CANON KABUSHIKI KAISHA

Inventor： Julien Sevin ,  Patrice Nezou ,  Pascal Viger ,  Stéphane Baron

IPC: H04L12/26 ,  H04L5/00

Abstract: Aspects of the present disclosure generally relate to a wireless communication method in a wireless network comprising a plurality of access points (APs) sharing a communication channel, each AP is configured to manage stations of a basic service set (BSS), the method comprising at a coordinator AP: signaling to another AP, referred to as coordinated AP, that the coordinator AP has gained access to the communication channel; and sending to the coordinated AP a resource allocation allocating a chunk of the communication channel for stations managed by the coordinated AP.

公开(公告)号：US12081449B2

公开(公告)日：2024-09-03

申请号：US18154648

申请日：2023-01-13

Applicant: CANON KABUSHIKI KAISHA

Inventor： Stéphane Baron ,  Pascal Viger ,  Patrice Nezou

IPC: H04W84/12 ,  H04L47/62 ,  H04L47/625 ,  H04L47/6295 ,  H04W72/543 ,  H04W74/0808

CPC classification number: H04L47/6215 ,  H04L47/626 ,  H04L47/6295 ,  H04W72/543 ,  H04W74/0808 ,  H04W84/12

Abstract: A communication method in a communication network comprising a plurality of nodes, at least one node comprising a plurality of traffic queues for serving data traffic at different priorities, each traffic queue being associated with a respective queue backoff value computed from respective queue contention parameters having first and second values in, respectively, a first and a second contention modes, obtaining quality of service requirements of data stored in a traffic queue of the node; checking whether the quality of service requirements can be fulfilled when accessing the communication channel using the second contention mode; if the requirements cannot be fulfilled as the result of the checking, disabling access to resource units provided by the other node within one or more transmission opportunities granted to the other node on the communication channel; and transmitting data stored in the traffic queue using the first contention mode.