公开(公告)号：US12200774B2

公开(公告)日：2025-01-14

申请号：US18464117

申请日：2023-09-08

Applicant: CANON KABUSHIKI KAISHA

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

IPC: H04W74/0833 ,  H04W40/24 ,  H04W72/121 ,  H04W74/00 ,  H04W74/0808

Abstract: The present invention relates to a wireless communication method in a wireless network comprising an access point and stations. The method comprises, at a station: receiving a trigger frame from the access point, the trigger frame reserving a transmission opportunity on at least one communication channel of the wireless network, the transmission opportunity including a random resource unit that the stations may access using a contention scheme; receiving parameters of the contention scheme in management frames from the access point, the parameters comprising a contention window range; contending access to the random resource unit of the transmission opportunity reserved by the received trigger frame, using a contention window value; and updating the contention window value based on the success or failure of the access to the random resource unit. The updated contention window value remains within the contention window range obtained from the most recently received contention scheme parameters.

公开(公告)号：US12021769B2

公开(公告)日：2024-06-25

申请号：US17623850

申请日：2020-06-29

Applicant: CANON KABUSHIKI KAISHA

Inventor： Stéphane Baron ,  Patrice Nezou ,  Pascal Viger

IPC: H04L5/00 ,  H04L1/1867 ,  H04L27/26 ,  H04W72/20 ,  H04W74/00 ,  H04W74/0816

CPC classification number: H04L5/0044 ,  H04L1/1896 ,  H04L5/0048 ,  H04L5/0094 ,  H04L27/2602 ,  H04W72/20 ,  H04W74/006 ,  H04W74/0816

Abstract: A flexible NFRP procedure is proposed where the AP can adjust the granularity of the possible answers to a given question. The NFRP trigger frame includes a tone set configuration indication representative of a number of tone groups per RU tone set. The number of possible FEEDBACK_STATUS values consequently also varies, making it possible for the AP to poll the stations for more detailed feedback reports. A station determines which FEEDBACK_STATUS values are available, calculates its FEEDBACK_STATUS value and retrieves the corresponding subset of tone groups on which energy must be sent. Due to the multiples existing tone set configurations, the station also determines the tones forming the subset to be activated, based on the tone set configuration indication. The station can then properly send its feedback report response by activating (emitting energy on) the appropriate tunes and therefore the appropriate tone groups.

公开(公告)号：US11792860B2

公开(公告)日：2023-10-17

申请号：US17854552

申请日：2022-06-30

Applicant: CANON KABUSHIKI KAISHA

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

IPC: H04W74/08 ,  H04W40/24 ,  H04W72/121 ,  H04W74/00

CPC classification number: H04W74/0833 ,  H04W40/244 ,  H04W72/121 ,  H04W74/006 ,  H04W74/0808

Abstract: The present invention relates to a wireless communication method in a wireless network comprising an access point and stations. The method comprises, at a station: receiving a trigger frame from the access point, the trigger frame reserving a transmission opportunity on at least one communication channel of the wireless network, the transmission opportunity including a random resource unit that the stations may access using a contention scheme; receiving parameters of the contention scheme in management frames from the access point, the parameters comprising a contention window range; contending access to the random resource unit of the transmission opportunity reserved by the received trigger frame, using a contention window value; and updating the contention window value based on the success or failure of the access to the random resource unit. The updated contention window value remains within the contention window range obtained from the most recently received contention scheme parameters.

公开(公告)号：US11729824B2

公开(公告)日：2023-08-15

申请号：US16497740

申请日：2018-04-27

Applicant: CANON KABUSHIKI KAISHA

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

IPC: H04W74/08 ,  H04W76/11 ,  H04L1/00 ,  H04W72/0446

CPC classification number: H04W74/0808 ,  H04L1/0003 ,  H04L1/0061 ,  H04W72/0446 ,  H04W76/11

Abstract: The present invention provides according to one of its aspects a method of communication in a wireless network comprising an access point and a plurality of stations, the method comprising, at one of the stations:



receiving a trigger frame from the access point, the trigger frame reserving a transmission opportunity on at least one communication channel of the wireless network, the transmission opportunity including random resource units that the stations may access using a contention scheme, wherein the trigger frame includes a first indicator specifying a traffic type of data allowed to be sent on at least one of the random resource units;
determining, based on the first indicator, eligible resource units, among the resource units in the reserved transmission opportunity, for the station to contend for access for transmitting data; and
transmitting data on a determined eligible resource unit using a contention scheme.

公开(公告)号：US11595996B2

公开(公告)日：2023-02-28

申请号：US17084479

申请日：2020-10-29

Applicant: CANON KABUSHIKI KAISHA

Inventor： Stéphane Baron ,  Patrice Nezou ,  Pascal Viger

IPC: H04W74/08 ,  H04W74/00 ,  H04L65/80 ,  H04W28/02 ,  H04W72/04 ,  H04W72/12 ,  H04W84/12 ,  H04W72/0453 ,  H04W72/121

Abstract: To avoid blocking node AC queues in the degraded MU EDCA mode due to regular OFDMA transmission of data from another AC queue in resource units provided by an AP, the present invention proposes to use a dedicated HEMUEDCATimer for each AC queue, in order for them to be able to exit the degraded MU EDCA mode independently of the other AC queues. In this respect, upon successfully transmitting data stored in two or more traffic queues, in each of one or more accessed resource units provided by the AP within one or more transmission opportunities, the node sets each traffic queue transmitting in the accessed resource unit in the degraded MU EDCA mode for a predetermined degrading duration counted down by a respective timer associated with the transmitting traffic queue. Next, upon expiry of any timer, the node switches back the associated traffic queue to the conventional EDCA mode.

公开(公告)号：US11553525B2

公开(公告)日：2023-01-10

申请号：US17196828

申请日：2021-03-09

Applicant: CANON KABUSHIKI KAISHA

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

IPC: H04W74/08 ,  H04W72/12 ,  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：US11516739B2

公开(公告)日：2022-11-29

申请号：US17051111

申请日：2019-04-24

Applicant: CANON KABUSHIKI KAISHA

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

IPC: H04W52/02 ,  H04W84/12

Abstract: The present invention provides a communication method in a wireless communication network comprising at least one network cell (BSS), each cell comprising at least one station (non-AP) managed by an access point (AP), the method comprising, at the access point: transmitting a Wake-Up radio (WUR) frame to at least one station of the network cell of the access point; transmitting a primary channel radio (PCR) frame including update information, the PCR frame being transmitted to said at least one station of the network cell of the access point.

公开(公告)号：US10660129B2

公开(公告)日：2020-05-19

申请号：US15741216

申请日：2016-07-08

Applicant: CANON KABUSHIKI KAISHA

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

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

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：US09749091B2

公开(公告)日：2017-08-29

申请号：US14550780

申请日：2014-11-21

Applicant: CANON KABUSHIKI KAISHA

Inventor： Pascal Viger ,  Romain Guignard ,  Stéphane Baron

IPC: H04L1/16 ,  H04W84/12

CPC classification number: H04L1/1685 ,  H04L1/1614 ,  H04L1/1621 ,  H04W84/12

Abstract: The present invention relates generally to communication networks and more specifically to methods and devices for data communication over a communication network. A method according to the invention comprises, at a transmitting node: obtaining a plurality of frames including first-type frames associated with an acknowledgment policy requiring acknowledgment and second-type frames associated with an acknowledgment policy requiring no acknowledgment; aggregating the frames of the obtained plurality of frames into an aggregated frame including at least one leading frame of second type and frames subsequent thereto, in an order depending on their associated acknowledgment policies; sending the aggregated frame to a receiving node; and sending an acknowledgment request frame to the receiving node to request it to acknowledge receipt of only subsequent frames of the aggregated frame. Such data communication scheme is liable to reduce bandwidth waste and head-of-line blocking and thus latency, compared to known scheme.

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.