Patents by Inventor Kun-Ting TSAI

Kun-Ting TSAI 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).

  • Patent number: 11916313
    Abstract: An appressed antenna includes an antenna housing and a metal shell. The antenna housing comprising a housing and a planar antenna, where the planar antenna is bent with one part folded onto the inner surface of the housing and other part pressed onto the outer surface of the housing. The antenna housing is sleeve fitted to the metal shell with a gap between for the planar antenna to radiate. In this all-metal environment, the position of the antenna is close to the gap opening will increase radiation efficiency. By having at least a branch at the tail end of the appressed antenna, the appressed antenna can have a good return loss and antenna gain.
    Type: Grant
    Filed: March 29, 2022
    Date of Patent: February 27, 2024
    Assignee: QuantumZ Inc.
    Inventors: Kun-Yen Tu, Meng-Hua Tsai, Wei-Ting Lee, Sin-Siang Wang
  • Patent number: 11658634
    Abstract: Technologies directed to a wireless device with RF port impedance detection using concurrent radios are described. One wireless device includes an impedance detection circuit with a bi-directional RF coupler and switching circuitry. A processing device at least two radios, at least two RF ports, and an impedance detection circuit. The impedance detection circuit is configured to measure a first receive signal strength indicator (RSSI) value of a first reflected signal. The first reflected signal corresponding to a first signal sent by one of the at least two radios. The impedance detection circuit determines that the first RSSI value exceeds a threshold. The threshold represents an impedance mismatch condition at or beyond at least one of the two RF ports. The processing device sends a first indicative of the impedance mismatch condition to a second device.
    Type: Grant
    Filed: August 12, 2021
    Date of Patent: May 23, 2023
    Assignee: Amazon Technologies, Inc.
    Inventors: Nathan Labadie, Kun Ting Tsai, Cheol Su Kim, Kalyan Teja Posani, Omar Fawazhashim Zakaria
  • Patent number: 11659588
    Abstract: Technologies directed to prioritized channel coordination in a multi-tier wireless network are described. One method includes identifying a first group of wireless devices located in a first geographical area using physical proximity information. The method includes, for a first wireless device having a highest priority among the wireless device in the first geographical area, determining a penalty value for each channel of a plurality of available channels and selecting a first channel having a lowest penalty value. The method includes, for a second wireless device having a second-highest priority, determining a penalty value for each of the remaining channels in the plurality of available channels and selecting a second channel, from the remaining channels, having a lowest penalty value. The method includes sending to the first wireless device information about the first channel and sending to the second wireless device information about the second channel.
    Type: Grant
    Filed: January 27, 2021
    Date of Patent: May 23, 2023
    Assignee: Amazon Technologies, Inc.
    Inventors: Kun Ting Tsai, Nathan Labadie, Cheol Su Kim, King Shaw, Sarang Wagholikar, Omar Fawazhashim Zakaria
  • Patent number: 11606791
    Abstract: Technologies directed to multi-tier coordinated dynamic frequency selection (DFS) service in a multi-tier wireless network are described. One method includes receiving, by a first wireless device, first data associated with a first set of DFS channels. The first wireless device performs a CAC on each DFS channel of the first set of DFS channels in a specified order. The first wireless device identifies a second set of DFS channels in which no radar event is found during the respective CAC and generates second data associated with the second set of DFS channels. The first wireless device receives a first request for the second data from a second wireless device.
    Type: Grant
    Filed: May 11, 2021
    Date of Patent: March 14, 2023
    Assignee: Amazon Technologies, Inc.
    Inventors: Kun Ting Tsai, Nathan Labadie, Cheol Su Kim, Sarang Wagholikar, Omar Fawazhashim Zakaria
  • Patent number: 11539610
    Abstract: Techniques for presence detection are described. In an example, system receives, from a first device connected with a computer network that is associated with a location, a first value of a first parameter associated with a link between the first device and a second device. The system determines, using a first prediction model and the first value, a first likelihood of presence at the location. The first prediction model is configured based at least in part on outputs of a second prediction model that uses a second parameter associated with the computer network. The system determines whether the presence is detected at the location based at least in part on the first likelihood.
    Type: Grant
    Filed: October 16, 2020
    Date of Patent: December 27, 2022
    Assignee: Amazon Technologies, Inc.
    Inventors: Durga Laxmi Narayana Swamy Inti, Kun Ting Tsai, Ravi Ichapurapu
  • Patent number: 11483046
    Abstract: Techniques for transmitting channel state information (CSI) are described. In an example, a device determines a condition associated with a link parameter of a link between the device and another device. Based at least in part on the condition, the device determines a CSI packet period. The device transmits, to the other device and based at least in part on the CSI packet period, a CSI packet over the link. Accordingly, when the conditions change, the CSI packet period can be adapted to the changes, thereby improving the CSI transmissions over the link given the most current conditions.
    Type: Grant
    Filed: August 25, 2020
    Date of Patent: October 25, 2022
    Assignee: Amazon Technologies, Inc.
    Inventors: Kun Ting Tsai, Ravi Ichapurapu, Durga Laxmi Narayana Swamy Inti, Haritha Tamvada, Kiran Kumar Edara
  • Patent number: 11483844
    Abstract: A wireless mesh network includes a first wireless access point (WAP) device designated as a primary device, where the first WAP device provides network connectivity to a plurality of client devices over a first dynamic frequency selection (DFS) channel. A second WAP device is designated as a secondary device to the first WAP device on the first DFS channel. In response to detection of a radar event by the first WAP device: the first WAP device transitions to being the secondary device on the first DFS channel; the second WAP device transitions to being the primary device on the first DFS channel; and the second WAP device performs a channel availability check (CAC) on a second DFS channel and communicates availability of the second DFS channel to the first WAP device.
    Type: Grant
    Filed: November 19, 2020
    Date of Patent: October 25, 2022
    Assignee: Amazon Technologies, Inc.
    Inventors: Kun Ting Tsai, Kiran Kumar Edara, Sarang Wagholikar, Omar Fawazhashim Zakaria, Ashish Kumar Shukla, Cheol Su Kim
  • Patent number: 11469804
    Abstract: Technologies directed to sectorized analog beam searching are described. One method includes a first wireless device receiving a first destination address of a second wireless device, a first angle value corresponding to a first direction, and a second angle value corresponding to a second direction. The first wireless device generates a first signal beam transmitted in the first direction and spanning a first geographic region and receives an RSSI value corresponding to the first signal beam. The first wireless generates a second signal beam transmitted in the second direction and spanning a second geographic region and receives a second RSSI value corresponding to the second signal beam. The first wireless device determines that the first RSSI value is greater than the second RSSI value. The first wireless device determines, using a third signal beam a third angle value corresponding to a third direction located within the first geographic region.
    Type: Grant
    Filed: September 1, 2021
    Date of Patent: October 11, 2022
    Assignee: Amazon Technologies, Inc.
    Inventors: Kun Ting Tsai, Manvendra Sharma, Tzung-I Lee, Cheol Su Kim, Sarang Wagholikar, Omar Fawazhashim Zakaria, Nathan Labadie
  • Patent number: 11399282
    Abstract: Technologies directed to a secured peer-to-peer cloud-assisted authentication exchange protocol are described. A first wireless device receives a first request including information identifying a second wireless device. The first wireless device determines that the information matches second information. The first wireless device activates a virtual access point (VAP) with a modified service set identifier (SSID) having a group identifier appended to a first SSID. The first wireless device authenticates the second wireless device to the VAP. The first wireless device sends credentials and a second SSID to the second wireless device. The second SSID corresponds to a second access point (AP). The first wireless device receives a second request from the second wireless device to connect to the second AP. The first wireless device authenticates the second wireless device with the second AP. The first wireless device deactivates the VAP after expiration of an amount of time.
    Type: Grant
    Filed: June 22, 2020
    Date of Patent: July 26, 2022
    Assignee: Amazon Technologies, Inc.
    Inventors: Kun Ting Tsai, Haritha Tamvada, Kiran Kumar Edara, Sarang Wagholikar, Nishant Suneel Sarmukadam, Ramesh Radhakrishnan
  • Patent number: 11375395
    Abstract: Network hardware devices organized in a wireless network. A controller device receives device information about each of a multiple network devices, network congestion at each device, scan data, and a station list from each of the devices. The controller device assigns a channel to each radio of the multiple network devices using the device information, the network congestion data, the scan data, and the station list and outputs a first subset of channel assignments to a first group of the network devices, a second subset of channel assignments to a second group of the network devices, and a third subset of channel assignments to a third group of the network devices.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: June 28, 2022
    Assignee: Amazon Technologies, Inc.
    Inventors: Chiu Ngok Eric Wong, Kun Ting Tsai, Xueheng Hu, Jian Lu, Armando J. Lucrecio
  • Patent number: 11283475
    Abstract: A wireless access point device includes a radio to establish a communication link on a first primary channel using a wireless local area network (WLAN) protocol. The communication link has an operating channel bandwidth and a communication link bandwidth that is adjustable to be identical to or lower than the operating channel bandwidth. The operating channel bandwidth includes the first primary channel and a plurality of secondary channels. The WAP device is to determine that received data, which contains in-phase and quadrature (I/Q) values, does not include a valid WLAN frame; determine that a first secondary channel of the plurality of secondary channels has an interference signal signature via application of frequency domain analysis on the I/Q sample values; and modify the communication link bandwidth from a first frequency range to a second width frequency range, which does not include the first secondary channel.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: March 22, 2022
    Assignee: Amazon Technologies, Inc.
    Inventors: Kun Ting Tsai, Ashish Kumar Shukla
  • Patent number: 11218203
    Abstract: Technologies directed to coordinated dynamic analog beamforming are described. One method includes receiving, by a digital controller of a first wireless device, a data packet, the data packet comprising a destination address of a second wireless device. The method further includes retrieving, from memory, beamformer configuration data associated with the destination address, the beamformer configuration data comprising a phase shifter angle value for a radiation pattern. The method sends, to a beamformer circuit, the phase shifter angle value, the beamformer circuit comprises a power splitter and a set of phase shifters (e.g., at least four). The method causes the set of phase shifters to steer the radiation pattern of electromagnetic energy, radiated by an antenna array of elements, at the phase shifter angle value and sends the data packet to the second wireless device via the antenna array.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: January 4, 2022
    Assignee: Amazon Technologies, Inc.
    Inventors: Tzung-I Lee, Kun Ting Tsai, Haritha Tamvada, Kwok Shing Lee, Cheol Su Kim, Omar Fawazhashim Zakaria, In Chul Hyun, Ali Mirkamali, Dan Richard Brukwinski
  • Patent number: 11197263
    Abstract: Network hardware devices organized in a wireless mesh network (WMN). The mesh network device receives, from a first device that is not part of the WMN, a first request to receive information about radar events in an area. The first request includes an identifier of a Dynamic Frequency (DFS) channel and first proximity data for at least one mesh network device in the vicinity of the first device. The mesh network device determines that i) the first device is located within the area; and ii) the first device is communicatively coupled with the at least one mesh network device and sends authorization to receive information about the radar events and coverage map data that identifies the area. The mesh network device sends, to the first device, first data about a first radar event in response to the radar event.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: December 7, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Kun Ting Tsai, Kiran Kumar Edara
  • Patent number: 11153181
    Abstract: Technologies directed to determining a role of a network device, configuring the network device according to the role, and provisioning the network device to a network are described. In one method, the hardware configuration information and external connection information are stored by the network device. The network device determines a role using the hardware configuration information and the external connection information without any manual intervention or manual configuration. The role can be any one of a Router Node, a Storage Node, a Base Station Node, a Relay Node, a Gateway Node, or a Customer Premises Equipment (CPE) Node. After recognizing the role, the network device can be configured and provisioned to the network without any manual intervention or manual configuration.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: October 19, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Kun Ting Tsai, Haritha Tamvada, Kiran Kumar Edara, Andrew Price, Omar Fawazhashim Zakaria
  • Patent number: 11121693
    Abstract: Technologies directed to a wireless device with RF port impedance detection using concurrent radios are described. One wireless device includes an impedance detection circuit with a bi-directional RF coupler and switching circuitry. A processing device controls the switching circuitry to i) couple the bi-directional RF coupler between a first radio and a first RF port and a second radio and a second RF port. The processing device causes a first radio to send a first signal and a second radio to measure a first receive signal strength indicator (RSSI) value of a first reflected signal. The processing device determines that the first RSSI value exceeds a threshold, the threshold representing an impedance mismatch condition at or beyond the first RF port. The processing device sends a message indicative of the impedance mismatch condition to a second device.
    Type: Grant
    Filed: January 16, 2020
    Date of Patent: September 14, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Nathan Labadie, Kun Ting Tsai, Cheol Su Kim, Kalyan Teja Posani, Omar Fawazhashim Zakaria
  • Patent number: 10979885
    Abstract: Network hardware devices organized in a wireless mesh network (WMN). A first mesh network device performs a three-stage discovery protocol; in a first stage, a discovery scan uses a first radio to find a set of neighbor devices in proximity; in a second stage, a discovery locate probe process is performed on a secondary discovery channel that is from a same frequency band group as a first DFS channel; in a third stage, a CAC is performed via the first DFS channel and, after the CAC, a neighbor peering request is sent and a neighbor peering response is received from a second mesh network device via a second radio. The neighbor peering response confirms establishment of a first communication channel between the second radio of the first mesh network device and a radio of the second mesh network device over the first DFS channel.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: April 13, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Ashish Kumar Shukla, Kun Ting Tsai, Karim Abulmakarem Mohamed Khalil, Burak Varan, Lori Yoshida, Kiran Kumar Edara
  • Patent number: 10924343
    Abstract: Technology for event propagation and action coordination in a mesh network is described. In one embodiment, a master mesh node for a first communication channel in a mesh network receives a first event notification message from a first dependent mesh node associated with the master mesh node. The first event notification message pertains to a first event detected by the first dependent mesh node. In response, the master mesh node generates a first action message specifying a first action associated with the first event and sends the first action message to the first dependent mesh node and to a second dependent mesh node associated with the master mesh node. The master mesh node, the first dependent mesh node, and the second dependent mesh node all exchange communications with each other using the first communication channel in the mesh network.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: February 16, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Ashish Kumar Shukla, Kiran Kumar Edara, Kun Ting Tsai, Sarang Wagholikar
  • Patent number: 10887026
    Abstract: Technologies directed to antenna disconnection detection of distributed radio frequency (RF) ports in a wireless network are described. One method receives data from the wireless devices and generates an RSSI matrix including multiple elements, each storing a receive signal strength indicator (RSSI) value indicative of a signal strength of a wireless link between a transmitter-receiver pair. The method identifies a characteristic pattern in the RSSI matrix. The characteristic pattern includes i) two or more RSSI values in a same row being less than the threshold value and ii) two or more RSSI values in a same column being less than the threshold value. The method stores an indication that an antenna is disconnected from an RF port and sends a command to the second wireless device that causes the second wireless device to disable a radio that is coupled to the RF port.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: January 5, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Kun Ting Tsai, Nathan Labadie, Cheol Su Kim, Haritha Tamvada, Omar Fawazhashim Zakaria
  • Patent number: 10880903
    Abstract: A method includes determining, by a cloud computing system, a number of radar events detected by wireless access point (WAP) devices of a wireless mesh network and by channels associated with respective ones of the WAP devices. The method includes determining a first WAP device has detected a fewest number of radar events and that a first DFS channel, of the first WAP device, has detected a fewest number of radar events as compared with a number of radar events detected via each of the other DFS channels of the first WAP device. The method includes assigning the first WAP device to be a master on the first DFS channel and transmitting, to the first WAP device, a message containing first assignment information regarding the first WAP device being assigned as the master on the first DFS channel.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: December 29, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Kun Ting Tsai, Kiran Kumar Edara, Sarang Wagholikar, Omar Fawazhashim Zakaria, Ashish Kumar Shukla, Cheol Su Kim
  • Publication number: 20200389808
    Abstract: Network hardware devices organized in a wireless network. A controller device receives device information about each of a multiple network devices, network congestion at each device, scan data, and a station list from each of the devices. The controller device assigns a channel to each radio of the multiple network devices using the device information, the network congestion data, the scan data, and the station list and outputs a first subset of channel assignments to a first group of the network devices, a second subset of channel assignments to a second group of the network devices, and a third subset of channel assignments to a third group of the network devices.
    Type: Application
    Filed: June 10, 2019
    Publication date: December 10, 2020
    Inventors: Chiu Ngok Eric Wong, Kun Ting Tsai, Xueheng Hu, Jian Lu, Armando J. Lucrecio