公开(公告)号：US20230397254A1

公开(公告)日：2023-12-07

申请号：US18452282

申请日：2023-08-18

Applicant: CANON KABUSHIKI KAISHA

Inventor： PASCAL VIGER ,  ROMAIN GUIGNARD

IPC: H04W74/08 ,  H04W74/02 ,  H04W72/0453 ,  H04W74/04 ,  H04W72/0446

CPC classification number: H04W74/0816 ,  H04W74/02 ,  H04W72/0446 ,  H04W74/04 ,  H04W74/0808 ,  H04W72/0453

Abstract: The invention relates to a method and system for simultaneous transmission of data from two or more wireless communication device during a transmission opportunity otherwise reserved for a single communication device. The invention proposes collaboration among the group of communication devices to reserve a transmission opportunity on a composite channel comprising of a plurality of sub-channels for the entire group and to efficiently manage allocation of the sub-channels for simultaneous data transmission from two or more devices. In the main aspect of the invention, the collaboration takes the form of grouping the sub-channels in the reserved composite channel so as to allow two or more stations to transmit data simultaneously over a contiguous frequency band. The collaboration among the group of communication devices may be in a managed or an ad hoc mode. The invention is particularly relevant to the IEEE 802.11 ac communication standard.

公开(公告)号：US20160066208A1

公开(公告)日：2016-03-03

申请号：US14837126

申请日：2015-08-27

Applicant: CANON KABUSHIKI KAISHA

Inventor： STÉPHANE BARON ,  ROMAIN GUIGNARD ,  PASCAL VIGER

IPC: H04W28/02

CPC classification number: H04W74/085

Abstract: The invention relates to a communication device and a method of sending data over a communication network. The communication device includes a controller for accessing the network using contention type access mechanism based on computation of back-off values, and includes a plurality of traffic queues for serving data traffic at different priorities. The controller includes a plurality of back-off engines, each associated with one traffic queue and configured to compute a back-off value in accordance with the priority of the associated traffic queue. One or more back-off engine may be adjusted to prevent the back-off value of such back-off engine to reach zero. When an access to the network is obtained for the device. a traffic queue may be selected based on its associated back-off value, and data may be transmitted from the selected traffic queue.

Abstract translation: 本发明涉及通信设备和通过通信网络发送数据的方法。 该通信装置包括：控制器，用于基于退避值的计算使用争用型访问机制访问网络，并且包括用于以不同优先级提供数据流量的多个业务队列。 控制器包括多个退避引擎，每个引擎引擎与一个流量队列相关联，并被配置为根据关联的流量队列的优先级来计算退避值。 可以调节一个或多个后退发动机以防止这种退避发动机的回退值达到零。 当为设备获取对网络的访问时。 可以基于其关联的退避值来选择业务队列，并且可以从所选择的业务队列中发送数据。

公开(公告)号：US20150010069A1

公开(公告)日：2015-01-08

申请号：US14320262

申请日：2014-06-30

Applicant: CANON KABUSHIKI KAISHA

Inventor： ROMAIN GUIGNARD ,  STÉPHANE BARON

IPC: H04N19/593

CPC classification number: H04N19/65 ,  H04N19/105 ,  H04N19/119 ,  H04N19/166 ,  H04N19/176

Abstract: A method of processing data for video encoding, comprising the following steps: obtaining a current coding entity of a current video frame to encode, said current frame to encode being segmented according to a plurality of coding entities, each coding entity comprising a plurality of coding units, and for a current coding unit of the current coding entity obtained: determining whether there are neighbouring pixels outside the current coding entity that can be used for generating an outside coding unit predictor for predicting said current coding unit, enabling, based on a result of said determining step, use of neighbouring pixels outside the current coding entity, for generating at least one outside coding unit predictor for predicting the current coding unit, and selecting, using at least one weighting criterion applied to the at least one outside coding unit predictor, a coding unit predictor among a default coding unit and the at least one outside coding unit predictor. Embodiments of the invention provide a good trade-off between reducing error propagation and keeping good compression efficiency.

Abstract translation: 一种处理视频编码数据的方法，包括以下步骤：获取当前视频帧的当前编码实体进行编码，根据多个编码实体对所述当前帧进行编码，每个编码实体包括多个编码 获得的当前编码实体的当前编码单元;确定当前编码实体之外是否存在可用于生成用于预测所述当前编码单元的外部编码单元预测器的相邻像素，基于结果 所述确定步骤的使用，用于当前编码实体之外的相邻像素的使用，用于生成用于预测当前编码单元的至少一个外部编码单元预测器，以及使用应用于至少一个外部编码单元预测器的至少一个加权标准 ，默认编码单元和至少一个外部编码单元预测器中的编码单元预测器。 本发明的实施例提供了减少误差传播和保持良好压缩效率之间的良好折衷。

公开(公告)号：US20140003367A1

公开(公告)日：2014-01-02

申请号：US13904860

申请日：2013-05-29

Applicant: Canon Kabushiki Kaisha

Inventor： PASCAL VIGER ,  PATRICE NEZOU ,  ROMAIN GUIGNARD

IPC: H04W74/08

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: 本发明包括对退避定时器的调整，以提供一组协作节点中的定时一致性。 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。

公开(公告)号：US20220239891A1

公开(公告)日：2022-07-28

申请号：US17580420

申请日：2022-01-20

Applicant: CANON KABUSHIKI KAISHA

Inventor： YACINE EL KOLLI ,  ROMAIN GUIGNARD ,  TRISTAN HALNA DU FRETAY ,  LIONEL TOCZE

IPC: H04N13/296 ,  H04J3/06

Abstract: The present invention relates to a method for generating control signals for an image capture device, the method being performed in a communication device comprising a first slave time generator and a second slave time generator, the communication device being connected to a first remote time server and a second remote time server, the method comprising: synchronizing the first slave time generator with the first remote time server; synchronizing the second slave time generator with the second remote time server; generating a first control signal based on the first clock, and sending the first control signal to the image capture device; and upon detecting a loss of synchronization between the first slave time generator and the first remote time server, generating a second control signal based on the second clock, and sending the second control signal to the image capture device.

公开(公告)号：US20180049242A1

公开(公告)日：2018-02-15

申请号：US15558140

申请日：2016-03-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： PASCAL VIGER ,  ROMAIN GUIGNARD

IPC: H04W74/08 ,  H04W72/04

CPC classification number: H04W74/0816 ,  H04W72/0446 ,  H04W72/0453 ,  H04W74/02

Abstract: The invention relates to a method and system for simultaneous transmission of data from two or more wireless communication device during a transmission opportunity otherwise reserved for a single communication device. The invention proposes collaboration among the group of communication devices to reserve a transmission opportunity on a composite channel comprising of a plurality of sub-channels for the entire group and to efficiently manage allocation of the sub-channels for simultaneous data transmission from two or more devices. In the main aspect of the invention, the collaboration takes the form of grouping the sub-channels in the reserved composite channel so as to allow two or more stations to transmit data simultaneously over a contiguous frequency band. The collaboration among the group of communication devices may be in a managed or an ad hoc mode. The invention is particularly relevant to the IEEE 802.11 ac communication standard.

公开(公告)号：US20150146648A1

公开(公告)日：2015-05-28

申请号：US14550780

申请日：2014-11-21

Applicant: CANON KABUSHIKI KAISHA

Inventor： PASCAL VIGER ,  ROMAIN GUIGNARD ,  STÉPHANE BARON

IPC: H04L5/00 ,  H04W72/04

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.

Abstract translation: 本发明一般涉及通信网络，更具体地涉及通过通信网络进行数据通信的方法和设备。 根据本发明的方法包括：在发送节点处：获得包括与需要确认的确认策略相关联的第一类型帧的多个帧和与不需要确认的确认策略相关联的第二类型帧; 将所获得的多个帧的帧聚合成包括至少一个第二类型的前导帧和其后的帧的聚合帧，其顺序取决于它们相关联的确认策略; 将聚合帧发送到接收节点; 以及向所述接收节点发送确认请求帧以请求其确认仅对所述聚合帧的后续帧的接收。 与已知方案相比，这种数据通信方案易于减少带宽浪费和线路阻塞，从而减少延迟。