Patents by Inventor DUNFA CHEN

DUNFA CHEN 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: 20210385152
    Abstract: In a network (1) of communicatively interconnected (9) node devices (2-8), such as a Zigbee™ enabled mesh network, application data, such as data from or to sensors (12-17) operatively connected (17; 18) to the node devices (2-8), are periodically exchanged by attaching the application data to periodically exchanged operational messages that are to be transmitted by a node device (2-8) in the network (1), such as the link status command messages according to the Zigbee protocol.
    Type: Application
    Filed: July 30, 2019
    Publication date: December 9, 2021
    Inventors: Jun YAO, Gang WANG, Rong FAN, Zhizhong ZHANG, Dunfa CHEN
  • Publication number: 20210022208
    Abstract: A method of and network devices arranged for inquiring node device address information after commissioning of a network of communicatively interconnected node devices. A gateway device (2) broadcasts an inquiry message (MINQ) in the network, requesting each of the node devices (3, 4, 5) to transmit its node device address announce message (MANN), after a time delay (?t1; ?t.2) from receiving the inquiry message (MINQ). The gateway device (2) transmits an acknowledgement message (MACK) to the node device addressed in a received node device address announce message (MANN), indicating that the respective node device address announce message (MANN) is received by the gateway device (2). A node device (4) may retransmit its node device address announce message (MANN) until receipt of an acknowledgement message (MACK). Received address information is stored by the gateway device (2) for control and communication purposes of the nodes in the network.
    Type: Application
    Filed: March 11, 2019
    Publication date: January 21, 2021
    Inventors: Weibo QIAN, Dunfa CHEN, Hao QUE, Shouzhen LAN
  • Publication number: 20210011705
    Abstract: A method (50) of and a server (19) and network node or client devices (3, 5) communicatively interconnected in a network (1) and arranged for over-the-air, OTA, data upgrade or update of client devices. In the event of a timeout (54) at the server (19) waiting for a response or request message from a selected OTA client (5) during an on-going OTA data upgrade, the OTA server (19) checks whether a network address change (51) of the selected OTA client (5) caused the OTA sewer to timeout.
    Type: Application
    Filed: March 21, 2019
    Publication date: January 14, 2021
    Inventors: Xiaoqi LIU, Shouzhen LAN, Dunfa CHEN, Junxi WU
  • Patent number: 10798802
    Abstract: A lighting device (10) is disclosed comprising a light engine (12) comprising at least one solid state lighting element (11); a controller (100) for controlling a dimming level of the light engine; a wireless communication module (16) communicatively coupled to the controller for receiving a wireless dimming instruction from a wireless controller (20); and a further communication module (15) communicatively coupled to the controller for connecting to a wired communication channel and for receiving a further dimming instruction from a further controller (30) wired to the further communication module through the wired communication channel; wherein the controller is adapted to independently control the dimming level of the light engine in response to the wireless dimming instruction and the further dimming instruction.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: October 6, 2020
    Assignee: SIGNIFY HOLDINGS B.V.
    Inventors: Eric Yang, Allen Zhang, Jeremy Jiang, Dunfa Chen, Feng He, Hai Tao Liu, Zhigang Pei
  • Patent number: 10652803
    Abstract: A method of enabling at least some of plurality of nodes to join a wireless network, where each operates according to a wireless networking protocol and each is a component of a lighting system. An initiating unit wirelessly broadcasts a discovery request using a protocol of the network, according to which each other node only responds to the discovery request as broadcast from the initiating unit on condition of being within a predetermined range. Hence one or more in-range nodes each respond to the discovery request from the initiating unit and thereby join the network, while one or more out-of-range nodes do not respond. One or more of the in-range nodes also act as relaying nodes, to re-broadcast the discovery request for receipt by one or more of the out-of-range nodes. One or more of the out-of-range nodes respond to the re-broadcast discovery requests, thereby joining the wireless network.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: May 12, 2020
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Gang Wang, Dunfa Chen
  • Patent number: 10575159
    Abstract: A standardized protocol defines that, when an initiator node is not already joined to a wireless network, and initiates a linking operation between the initiator node a second node, then this will create a new wireless network. According to the disclosure, a field of one of the standardized messages is adapted, and the adapted message is sent from the initiator node to the second node, in order to indicate that the adapted message is in fact a request for the initiator node to join an existing wireless network, to which the second node is already joined. The field in question is a field which the standardized protocol allows to be varied for application specific purposes. In response to the adapted message, the initiator receives back an invitation message inviting the initiator node to join the existing network; and in response to the invitation message, the initiator joins the existing network.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: February 25, 2020
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Gang Wang, Dunfa Chen
  • Publication number: 20190281682
    Abstract: A lighting device (10) is disclosed comprising a light engine (12) comprising at least one solid state lighting element (11); a controller (100) for controlling a dimming level of the light engine; a wireless communication module (16) communicatively coupled to the controller for receiving a wireless dimming instruction from a wireless controller (20); and a further communication module (15) communicatively coupled to the controller for connecting to a wired communication channel and for receiving a further dimming instruction from a further controller (30) wired to the further communication module through the wired communication channel; wherein the controller is adapted to independently control the dimming level of the light engine in response to the wireless dimming instruction and the further dimming instruction.
    Type: Application
    Filed: October 26, 2017
    Publication date: September 12, 2019
    Inventors: Eric YANG, Allen ZHANG, Mingjian JIANG, Dunfa CHEN, Feng HE, Hai LIU, Zhigang PEI
  • Patent number: 10243689
    Abstract: This invention generally relates to interference mitigation, and more specifically to interference mitigation in wireless communications networks. The proposed solution takes advantage of the clear channel assessment (CCA) function used by WLAN networks. Hence, by jamming the interfering WLAN channel during a predetermined time period, the interfering WLAN network is forced to withhold transmissions on the WLAN interfering channel during a backoff period of time. The solution of the subject application makes use of this backoff period to enable a WPAN network to transmit critical information such as, but not limited to, a request for changing the current working frequency.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: March 26, 2019
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Zhizhong Zhang, Koen Johanna Guillaume Holtman, Peilang Dong, Jun Yao, Hai Tao Liu, Gang Wang, Dunfa Chen
  • Publication number: 20180302775
    Abstract: A standardized protocol defines that, when an initiator node is not already joined to a wireless network, and initiates a linking operation between the initiator node a second node, then this will create a new wireless network. According to the disclosure, a field of one of the standardized messages is adapted, and the adapted message is sent from the initiator node to the second node, in order to indicate that the adapted message is in fact a request for the initiator node to join an existing wireless network, to which the second node is already joined. The field in question is a field which the standardized protocol allows to be varied for application specific purposes. In response to the adapted message, the initiator receives back an invitation message inviting the initiator node to join the existing network; and in response to the invitation message, the initiator joins the existing network.
    Type: Application
    Filed: September 28, 2016
    Publication date: October 18, 2018
    Applicant: PHILIPS LIGHTING HOLDING B.V.
    Inventors: GANG WANG, DUNFA CHEN
  • Publication number: 20180255506
    Abstract: A method of enabling at least some of plurality of nodes to join a wireless network, where each operates according to a wireless networking protocol and each is a component of a lighting system. An initiating unit wirelessly broadcasts a discovery request using a protocol of the network, according to which each other node only responds to the discovery request as broadcast from the initiating unit on condition of being within a predetermined range. Hence one or more in-range nodes each respond to the discovery request from the initiating unit and thereby join the network, while one or more out-of-range nodes do not respond. One or more of the in-range nodes also act as relaying nodes, to re-broadcast the discovery request for receipt by one or more of the out-of-range nodes. One or more of the out-of-range nodes respond to the re-broadcast discovery requests, thereby joining the wireless network.
    Type: Application
    Filed: September 6, 2016
    Publication date: September 6, 2018
    Inventors: Gang WANG, Dunfa CHEN
  • Publication number: 20170207877
    Abstract: This invention generally relates to interference mitigation, and more specifically to interference mitigation in wireless communications networks. The proposed solution takes advantage of the clear channel assessment (CCA) function used by WLAN networks. Hence, by jamming the interfering WLAN channel during a predetermined time period, the interfering WLAN network is forced to withhold transmissions on the WLAN interfering channel during a backoff period of time. The solution of the subject application makes use of this backoff period to enable a WPAN network to transmit critical information such as, but not limited to, a request for changing the current working frequency.
    Type: Application
    Filed: May 22, 2015
    Publication date: July 20, 2017
    Inventors: ZHIZHONG ZHANG, KOEN JOHANNA GUILLAUME HOLTMAN, PEILANG DONG, JUN YAO, HAI TAO LIU, GANG WANG, DUNFA CHEN