公开(公告)号：US11924814B2

公开(公告)日：2024-03-05

申请号：US18302688

申请日：2023-04-18

Applicant: CANON KABUSHIKI KAISHA

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

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

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：US11818765B2

公开(公告)日：2023-11-14

申请号：US17587951

申请日：2022-01-28

Applicant: CANON KABUSHIKI KAISHA

Inventor： Pascal Viger ,  Stéphane Baron ,  Patrice Nezou

IPC: H04W74/08 ,  H04W72/0446 ,  H04W72/121

CPC classification number: H04W74/0833 ,  H04W72/0446 ,  H04W72/121

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：US11533152B2

公开(公告)日：2022-12-20

申请号：US17121102

申请日：2020-12-14

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：US11438889B2

公开(公告)日：2022-09-06

申请号：US16606676

申请日：2018-04-20

Applicant: CANON KABUSHIKI KAISHA

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

IPC: H04W72/04 ,  H04W72/12 ,  H04W74/08 ,  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：US11166314B2

公开(公告)日：2021-11-02

申请号：US16316706

申请日：2017-07-12

Applicant: CANON KABUSHIKI KAISHA

Inventor： Stéphane Baron ,  Patrice Nezou ,  Pascal Viger

IPC: H04L12/00 ,  H04W74/08 ,  H04W56/00 ,  H04W72/04 ,  H04W74/00

Abstract: 802.11ax nodes benefit from additional medium accesses through multi-user uplink provided by an AP, compared to legacy node. To restore fairness in medium access, the invention proposes to update node's EDCA parameters, in particular EDCA backoffs, using penalty values each time the node successfully transmits data to the AP over OFDMA resource units. This is to reduce the probability for the node to access anew a communication channel through conventional EDCA contention. The penalty value is preferably provided by the AP which has an overview of the system and may be adjusted based on information local to the node, for instance the amount of data transmitted or its current contention window. For instance, the penalty value is added to the current value of the EDCA backoff counters upon successful OFDMA transmission by the node.

公开(公告)号：US11051303B2

公开(公告)日：2021-06-29

申请号：US16564219

申请日：2019-09-09

Applicant: CANON KABUSHIKI KAISHA

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

IPC: H04W72/04 ,  H04W74/08 ,  H04W84/12

Abstract: 802.11 ac networks define an operating band made of an ordered series of 20 MHz channels and authorize a restricted number of possible composite channel configurations to be used for data transmission. A method of transmitting data between a source and a receiver in such a wireless network may comprise, at the source: sending, to the receiver, RTS frames to request reservation of a composite channel, the RTS frames including a flag signalling the source supports transmission over un-authorized composite channels, for instance over sub-channels not contiguous within the operating band; receiving, from the receiver in response to the RTS frames, CTS frames acknowledging reservation of un-authorized composite channel configuration, for instance of non-contiguous sub-channels; and then transmitting, to the receiver, data frames on the reserved sub-channels of the un-authorized configuration, for instance on the reserved non-contiguous sub-channels within the operating band.

公开(公告)号：US10980060B2

公开(公告)日：2021-04-13

申请号：US15743226

申请日：2016-07-08

Applicant: CANON KABUSHIKI KAISHA

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

IPC: H04W74/08 ,  H04W72/12 ,  H04W84/12 ,  H04W74/06 ,  H04W28/26

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：US10856212B2

公开(公告)日：2020-12-01

申请号：US15859007

申请日：2017-12-29

Applicant: CANON KABUSHIKI KAISHA

Inventor： Pascal Viger ,  Stéphane Baron ,  Patrice Nezou

IPC: H04W74/08 ,  H04W48/12 ,  H04W92/20 ,  H04W72/12 ,  H04W74/00 ,  H04W84/12 ,  H04W88/08

Abstract: A physical Access Point (AP) manages a plurality of BSS groups through Virtual APs. The AP periodically sends beacon frames informing of the profile of each BSS of the plurality of BSSs. To improve channel utilization, the trigger frame identifies a plurality of BSS groups, stations of which are allowed to access the resources units to transmit data during the reserved TXOP. The AP receives, during the reserved TXOP, data from one station of a first group identified in the trigger frame and data from one station (separate from the first one) of a second and separate group identified in the trigger frame. First group and second group use the same joint set of random access parameters for the random access procedure, thus ensuring equivalent fairness in accessing the offered the resources units to transmit data during the reserved TXOP to several BSSs.

公开(公告)号：US09532380B2

公开(公告)日：2016-12-27

申请号：US14074064

申请日：2013-11-07

Applicant: CANON KABUSHIKI KAISHA

Inventor： Pascal Viger ,  Patrice Nezou

IPC: H04W74/08

CPC classification number: H04W74/0816

Abstract: The method improves data exchange on a wireless communication medium accessible by a plurality of nodes via a contention mechanism, the plurality of nodes comprising legacy nodes and a collaborative group of nodes, each node of the collaborative group being provided with a first and a second MAC address. The method comprises, upon successful contention at a first node of the group, at the first node: determining if a communication from a source node of the group to a legacy node is required, and in such a case, selecting the second MAC address of the source node as source address for issuing a request to access the medium (RTS), and, upon reception of a medium access authorization (CTS): transmitting first data to the legacy node using said second MAC address, and transmitting second data inside the group using said first MAC address.

Abstract translation: 该方法通过竞争机制改善由多个节点可访问的无线通信介质上的数据交换，所述多个节点包括传统节点和协作组节点，协作组的每个节点被提供有第一和第二MAC 地址。 所述方法包括：在所述组的第一节点处成功争用在所述第一节点处：确定是否需要从所述组的源节点到传统节点的通信，并且在这种情况下，选择所述组的第二MAC地址 所述源节点作为用于发出访问所述媒体（RTS）的请求的源地址，以及在接收到媒体访问授权（CTS）时：使用所述第二MAC地址向所述遗留节点发送第一数据，并且在所述源节点内发送第二数据 组使用所述第一MAC地址。

公开(公告)号：US09445436B2

公开(公告)日：2016-09-13

申请号：US13904860

申请日：2013-05-29

Applicant: CANON KABUSHIKI KAISHA

Inventor： Pascal Viger ,  Patrice Nezou ,  Romain Guignard

IPC: H04W74/08 ,  H04W56/00

CPC classification number: H04W74/0816 ,  H04W56/002 ,  H04W56/003 ,  H04W56/0045

Abstract: The invention comprises adjustment of back-off timers to provide consistency of timing in a group of collaborating nodes.The invention facilitates optimizing access to a wireless medium in a communication network accessible by a plurality of nodes, each node implementing a back-off counting based on carrier sense multiple access with collision avoidance, the plurality of nodes comprising a collaborative group of nodes further implementing a back-off allocation scheme based on each node maintaining a list of expected back-off values of the other nodes of the collaborative group, the group further comprising a receiving node and an emitting node, reception of information from the emitting node being utilized by the receiving node to maintain consistency of timing through adjustment of back-off values.

Abstract translation: 本发明有助于优化对由多个节点可访问的通信网络中的无线介质的访问，每个节点基于具有冲突避免的载波侦听多路访问实现退避计数，所述多个节点包括协同组的节点进一步实现 基于每个节点维护协作组的其他节点的预期后退值的列表的退避分配方案，所述组还包括接收节点和发布节点，从所述发布节点接收正在被所使用的信息 接收节点通过调整退避值来保持时序的一致性。