Patents by Inventor Stephane Baron

Stephane Baron has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210051728
    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.
    Type: Application
    Filed: February 20, 2019
    Publication date: February 18, 2021
    Inventors: Pascal VIGER, Stéphane BARON, Julien SEVIN, Patrice NEZOU
  • Publication number: 20210051721
    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.
    Type: Application
    Filed: October 29, 2020
    Publication date: February 18, 2021
    Inventors: Stéphane BARON, Patrice NEZOU, Pascal VIGER
  • Patent number: 10893539
    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.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: January 12, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Stéphane Baron, Patrice Nezou, Pascal Viger
  • Patent number: 10856212
    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.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: December 1, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Pascal Viger, Stéphane Baron, Patrice Nezou
  • Publication number: 20200374907
    Abstract: A method of communication in a wireless network comprising an access point and stations, the method comprising by at least one emitting station having data to be directly transmitted to at least one destination station different from the access point: generating a status report to be transmitted to the access point, said status report indicating an amount of data of at least an emission buffer of the emitting station, said data been directed to one of the said at least one destination station; and transmitting said status report to the access point-; wherein said status report contains an identification element allowing the access point to reserve a wireless resource for the direct transmission between the emitting station and the destination station. Accordingly, scheduled traffic by a station is made with an accurate amount of data for the direct link.
    Type: Application
    Filed: January 15, 2019
    Publication date: November 26, 2020
    Inventors: Pascal VIGER, Julien SEVIN, Stéphane BARON, Patrice NEZOU
  • Publication number: 20200361421
    Abstract: A system for distributing a fluid in a vehicle, comprising: a plurality n of independent fluid ejection devices; a plurality n?1 of distributors, each having an inlet, a first outlet and a second outlet and being configured to establish a fluid connection either between the inlet and the first outlet or between the inlet and the second outlet; the inlet of a first distributor being connected to a pump connected to a fluid reservoir; each independent ejection device being connected to an outlet of a distributor; at least one outlet of a distributor being connected to the inlet of a subsequent distributor.
    Type: Application
    Filed: May 15, 2020
    Publication date: November 19, 2020
    Inventors: Urs Grether, Stéphane Baron
  • Publication number: 20200362981
    Abstract: A fluid distributor comprising: a fluid inlet, a first outlet connected to the inlet by a first fluid communication channel, a second outlet connected to the inlet by a second fluid communication channel, an actuator comprising a movable piston capable of moving between an initial position and a switched position; a first deformable diaphragm, in contact with the first end of the piston, and configured to close the first channel when the piston is in its switched position; a second deformable diaphragm, in contact with the second end of the piston, and configured to close the second channel when the piston is in its initial position.
    Type: Application
    Filed: May 15, 2020
    Publication date: November 19, 2020
    Inventors: Urs Grether, Stéphane Baron
  • Publication number: 20200287838
    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.
    Type: Application
    Filed: May 22, 2020
    Publication date: September 10, 2020
    Inventors: Stéphane BARON, Pascal VIGER, Patrice NEZOU
  • Publication number: 20200275486
    Abstract: In an 802.11ax network with an access point, a trigger frame offers scheduled and random resource units to nodes for data uplink communication to the access point. To avoid the overall energy level seen by legacy nodes for a communication channel to drop below a detection threshold, the invention provides two tools. First, the scheduled and random resource units may be interleaved over communication channels. Second, unused resource units may be detected, and a node or the access point may send a padding signal on them to increase the overall energy level. The latter may be evaluated during a monitoring period before deciding to emit the signal. As the overall energy level seen by legacy nodes is increased, the risk that such legacy nodes do not detect activity on a 20 MHz channel having only a subpart of its RUs used is reduced. And risks of collisions are consequently reduced.
    Type: Application
    Filed: May 12, 2020
    Publication date: August 27, 2020
    Inventors: Pascal VIGER, Patrice NEZOU, Stéphane BARON, Romain GUIGNARD
  • Publication number: 20200245359
    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.
    Type: Application
    Filed: April 13, 2020
    Publication date: July 30, 2020
    Inventors: Patrice NEZOU, Stéphane BARON, Romain GUIGNARD, Pascal VIGER
  • Patent number: 10700989
    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.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: June 30, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Stéphane Baron, Pascal Viger, Patrice Nezou
  • Patent number: 10681731
    Abstract: In an 802.11ax network with an access point, a trigger frame offers scheduled and random resource units to nodes for data uplink communication to the access point. To avoid the overall energy level seen by legacy nodes for a communication channel to drop below a detection threshold, the invention provides two tools. First, the scheduled and random resource units may be interleaved over communication channels. Second, unused resource units may be detected, and a node or the access point may send a padding signal on them to increase the overall energy level. The latter may be evaluated during a monitoring period before deciding to emit the signal. As the overall energy level seen by legacy nodes is increased, the risk that such legacy nodes do not detect activity on a 20 MHz channel having only a subpart of its RUs used is reduced. And risks of collisions are consequently reduced.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: June 9, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Pascal Viger, Patrice Nezou, Stéphane Baron, Romain Guignard
  • Patent number: 10660129
    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.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: May 19, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Patrice Nezou, Stéphane Baron, Romain Guignard, Pascal Viger
  • Publication number: 20200120711
    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.
    Type: Application
    Filed: April 27, 2018
    Publication date: April 16, 2020
    Inventors: Julien SEVIN, Pascal VIGER, Patrice NEZOU, Stéphane BARON
  • Publication number: 20200107363
    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.
    Type: Application
    Filed: April 27, 2018
    Publication date: April 2, 2020
    Inventors: Patrice NEZOU, Stéphane BARON, Pascal VIGER, Julien SEVIN
  • Publication number: 20200092881
    Abstract: The invention relates to improve use of resource units in MU transmissions of an 802.1 1ax 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.
    Type: Application
    Filed: April 20, 2018
    Publication date: March 19, 2020
    Inventors: Patrice NEZOU, Pascal VIGER, Stéphane BARON, Julien SEVIN
  • Publication number: 20200029324
    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.
    Type: Application
    Filed: January 5, 2018
    Publication date: January 23, 2020
    Inventors: Patrice NEZOU, Stéphane BARON, Pascal VIGER
  • Publication number: 20200008200
    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.
    Type: Application
    Filed: September 9, 2019
    Publication date: January 2, 2020
    Inventors: Pascal VIGER, Stéphane BARON, Romain GUIGNARD, Patrice NEZOU
  • Patent number: 10492231
    Abstract: The invention relates to a method and device for sending data over a channel of a communication medium comprising a plurality of channels and which can be accessed by a plurality of nodes. Each node using a medium access mechanism with collision avoidance based on a computation of backoff values corresponding to a number of time-slots a node waits before accessing the communication medium. The method comprising the following steps performed by a first node of the plurality of nodes upon the reception of a trigger frame: obtaining a backoff counter value computed by the first node; selecting a channel among the plurality of channels based on the obtained backoff counter; and sending data on the selected channel by the first node.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: November 26, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Pascal Viger, Patrice Nezou, Romain Guignard, Stéphane Baron
  • Patent number: 10448398
    Abstract: 802.11ac 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.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: October 15, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Pascal Viger, Stéphane Baron, Romain Guignard, Patrice Nezou