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).
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Patent number: 10862518Abstract: Technologies directed to a wireless device with a Radio Frequency (RF) Decibel-Scaled Wireless Interference Detector that provides accurate energy readings of a channel through decibel-scaled output voltage are described. One method of the wireless device includes receiving a first RF signal via an antenna and converting the first RF signal to a multiple samples using a sampling rate, each sample including a digital value of a decibel-scaled output voltage. The method converts each of the samples to an energy value using a voltage-to-energy lookup table and determines a congestion level of a channel using the energy values.Type: GrantFiled: December 6, 2019Date of Patent: December 8, 2020Assignee: Amazon Technologies, Inc.Inventors: Nathan Labadie, Kun Ting Tsai, Cheol Su Kim, Kwok Shing Lee, Haritha Tamvada
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Patent number: 10855351Abstract: A wireless device includes a radio, a first directional antenna, a second directional antenna, an omnidirectional antenna, and a switch selectively coupled between the radio and the first directional antenna, the second directional antenna, and the omnidirectional antenna. A processor is coupled to the switch and to, for a frame: determine, based on an arbitration table, a destination medium access control address of a client wireless device and identifiers of antennas for transmitting the frame and receiving acknowledgement data; cause the switch to couple the radio to the first directional antenna; transmit the frame to the client wireless device via the first directional antenna, wherein the first client wireless device is located along a first direction with respect to the wireless device; cause the switch to couple the radio to the omnidirectional antenna; and receive an acknowledgment, corresponding to the frame, from the client wireless device via the omnidirectional antenna.Type: GrantFiled: December 10, 2018Date of Patent: December 1, 2020Assignee: Amazon Technologies, Inc.Inventors: Kun Ting Tsai, Kiran Kumar Edara, Sarang Wagholikar, Omar Fawazhashim Zakaria, Ashish Kumar Shukla, Tzung-I Lee, Ali Mirkamali
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Patent number: 10645694Abstract: Over the air signaling of dynamic frequency selection operating parameters to client devices is disclosed. In an embodiment, a multi-channel master device determines a maximum range value of a radar detection umbrella associated with the multi-channel master device based on a first range representing a range at which the multi-channel master device detects a first radar transmission transmitted by a radar device at a defined transmission power; determines a compliance range value based on a second range representing a range at which the multi-channel master device detects a second radar transmission transmitted by the radar device at a dynamic frequency selection (DFS) compliance threshold transmission power; and determines a margin range value based on a third range representing a range at which the multi-channel master device detects a third radar transmission transmitted by the radar device at a transmission power that is lower than the dynamic frequency selection compliance threshold transmission power.Type: GrantFiled: July 12, 2017Date of Patent: May 5, 2020Assignee: Network Performance Research Group LLCInventors: Seung Baek Yi, Kun Ting Tsai, Paul V. Yee, Terry F. K. Ngo, Erick Kurniawan
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Patent number: 10574316Abstract: A device includes a first radio controller, a second radio controller, and a processor. The processor is configured to execute instructions for determining that a first signal strength of a signal received from a remote device by a first antenna electrically connected to the first radio controller is less than a minimum signal strength threshold for communications using the first antenna, identifying a network process configured to communicate with a remote device using the first radio controller or the second radio controller, and determining that the processor is not executing the network process. The processor is further configured to execute instructions for, determining a second signal strength of a second signal received from the remote device by a second antenna, determining the second signal strength is greater than the first signal strength, and causing the first radio controller to communicate using the second antenna.Type: GrantFiled: May 23, 2018Date of Patent: February 25, 2020Assignee: AMAZON TECHNOLOGIES, INC.Inventors: Ravi Ichapurapu, Shao-Cheng Wang, Vipul Jain, Kun Ting Tsai, Milos Jorgovanovic, Chirag Saurabh Bhavsar, Vinay Gotnakodlu Hegde
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Patent number: 10477585Abstract: Microwave interference mitigation techniques and systems are disclosed herein. In some embodiments, microwave interference mitigation involves coordinating wireless traffic in accordance with a magnetron's on-and-off cycle so that data is not sent during the magnetron's on period, and is exclusively sent during the magnetron's off period. Wireless traffic can be coordinated using a voltage monitoring and zero-crossing point detection technique coupled with a Clear To Send (CTS) packet. For non-microwave devices, wireless traffic coordination can be achieved using a pattern matching algorithm coupled with a Clear Channel Assessment (CCA) threshold adjustment during the magnetron's on-and-off cycles. Additional, or alternative, microwave interference mitigation techniques involve decreasing a maximum packet size for data packets that are to be transmitted wirelessly in the environment, which guarantees successful transmission of data packets during the magnetron's off periods.Type: GrantFiled: July 30, 2018Date of Patent: November 12, 2019Assignee: Amazon Technologies, Inc.Inventors: Kun Ting Tsai, Chirag Bhavsar, Huanchun Ye, Varadarajan Gopalakrishnan, QingYun Wei, Morris Hsu, James Edwin Christy
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Patent number: 10448424Abstract: The present invention relates to wireless networks and more specifically to systems and methods for selecting available channels free of radar signals from a plurality of 5 GHz radio frequency channels. In one embodiment, the present invention provides a standalone multi-channel DFS master that includes a switch and embedded processor that are programmed to switch a 5 GHz radio transceiver to a first channel of the plurality of 5 GHz radio channels, cause a beacon generator to generate a beacon in the first channel of the plurality of 5 GHz radio channels, cause a radar detector to scan for the radar signal in the first channel of the plurality of 5 GHz radio channel, and then repeat these steps for each of the other channels of the plurality of 5 GHz radio channels during a single beacon transmission duty cycle.Type: GrantFiled: October 11, 2017Date of Patent: October 15, 2019Assignee: NETWORK PERFORMANCE RESEARCH GROUP LLCInventors: Terry F K Ngo, Seung Baek Yi, Erick Kurniawan, Kun Ting Tsai
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Systems, methods and computer-readable storage media facilitating mobile device guest network access
Patent number: 10447685Abstract: Mobile device access to a guest network is facilitated. A method comprises: detecting a home network having an associated access point based on the device being within a first defined proximity of the associated access point; and transmitting information indicative of a request to establish a guest network via the associated access point of the home network and providing authentication information for an entity associated with the device. The method also comprises establishing the guest network according to one or more assigned resources based on receipt of an acknowledgement message received from a cloud device, wherein receipt of the acknowledgment message from the cloud device is based on cloud device determination that the entity associated with the device is authenticated and based on receipt of an authorization by an entity associated with the home network.Type: GrantFiled: April 21, 2017Date of Patent: October 15, 2019Assignee: NETWORK PERFORMANCE RESEARCH GROUP LLCInventors: Terry F K Ngo, Seung Baek Yi, Erick Kurniawan, Kun Ting Tsai -
Patent number: 10368247Abstract: This application relates to wireless networks and more specifically to systems and methods for determining the location of distributed radar detectors and selecting available channels free of radar signals from a plurality of radio frequency channels. One embodiment includes a cloud DFS super master and a radar detector communicatively coupled to the cloud DFS super master. The cloud DFS super master is programmed to receive the results of the scan for a radar signal from the radar detector and to generate integrated client device geolocation information. The cloud DFS super master is also programmed to determine a location for the radar detector based at least on the integrated client device geolocation information, and determine a radio channel free of the radar signal based at least on the location for the radar detector and the results of the scan for the radar signal.Type: GrantFiled: December 2, 2016Date of Patent: July 30, 2019Assignee: NETWORK PERFORMANCE RESEARCH GROUP LLCInventors: Terry F K Ngo, Seung Baek Yi, Erick Kurniawan, Kun Ting Tsai
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Patent number: 10349290Abstract: The present invention relates to wireless networks and more specifically to systems and methods for selecting and implementing communication parameters used in a wireless network to optimize communication between access points and client devices while accounting for effects of adjacent networks. In one embodiment, the present invention includes a Wi-Fi coordinator device that receives packet information from devices within wireless range of the Wi-Fi coordinator. The Wi-Fi coordinator sends the packet information to a cloud intelligence engine which then time shifts the packet information and combines the packet information with other packet information. Using this integrated packet information, the cloud intelligence devices determines the access point settings to improve the operation of the network.Type: GrantFiled: September 21, 2017Date of Patent: July 9, 2019Assignee: NETWORK PERFORMANCE RESEARCH GROUP LLCInventors: Terry F K Ngo, Seung Baek Yi, Erick Kurniawan, Kun Ting Tsai
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Method and apparatus for directed adaptive control of dynamic channel selection in wireless networks
Patent number: 10257832Abstract: The present invention relates to wireless networks and more specifically to systems and methods for selecting available channels free of radar signals from a plurality of radio frequency channels. In one embodiment, the present invention provides a standalone multi-channel DFS master device and a cloud intelligence device. The standalone multi-channel DFS master device generates spectral information associated with a plurality of communication channels for a device in communication with the standalone multi-channel DFS master device. The cloud intelligence device receives the spectral information via a network device, integrates the spectral information with other spectral information to generate integrated spectral information, and determines a communication channel for the device that is selected from the plurality of communication channels based at least on the integrated spectral information.Type: GrantFiled: April 11, 2018Date of Patent: April 9, 2019Assignee: NETWORK PERFORMANCE RESEARCH GROUP LLCInventors: Terry F K Ngo, Seung Baek Yi, Erick Kurniawan, Kun Ting Tsai -
Publication number: 20190090242Abstract: The present invention relates to wireless networks and more specifically to a method and apparatus for providing dynamic frequency selection (DFS) spectrum access in peer-to-peer wireless networks. Embodiments of the present invention include a standalone DFS master coupled to a client device and configured to collect and/or generate spectral information associated with a plurality of 5 GHz DFS communication channels and a cloud intelligence engine that is also coupled to the client device and configured to receive the spectral information via the client device. The cloud intelligence engine is configured to determine a list of one or more communication channels for the standalone multi-channel DFS master from the plurality of 5 GHz DFS communication channels.Type: ApplicationFiled: September 13, 2018Publication date: March 21, 2019Inventors: Terry F K Ngo, Seung Baek Yi, Erick Kurniawan, Kun Ting Tsai
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Patent number: 10104665Abstract: The present invention relates to wireless networks and more specifically to a method and apparatus for providing dynamic frequency selection (DFS) spectrum access in peer-to-peer wireless networks. Embodiments of the present invention include a standalone DFS master coupled to a client device and configured to collect and/or generate spectral information associated with a plurality of 5 GHz DFS communication channels and a cloud intelligence engine that is also coupled to the client device and configured to receive the spectral information via the client device. The cloud intelligence engine is configured to determine a list of one or more communication channels for the standalone multi-channel DFS master from the plurality of 5 GHz DFS communication channels.Type: GrantFiled: September 8, 2016Date of Patent: October 16, 2018Assignee: NETWORK PERFORMANCE RESEARCH GROUP LLCInventors: Terry F K Ngo, Seung Baek Yi, Erick Kurniawan, Kun Ting Tsai
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METHOD AND APPARATUS FOR DIRECTED ADAPTIVE CONTROL OF DYNAMIC CHANNEL SELECTION IN WIRELESS NETWORKS
Publication number: 20180234974Abstract: The present invention relates to wireless networks and more specifically to systems and methods for selecting available channels free of radar signals from a plurality of radio frequency channels. In one embodiment, the present invention provides a standalone multi-channel DFS master device and a cloud intelligence device. The standalone multi-channel DFS master device generates spectral information associated with a plurality of communication channels for a device in communication with the standalone multi-channel DFS master device. The cloud intelligence device receives the spectral information via a network device, integrates the spectral information with other spectral information to generate integrated spectral information, and determines a communication channel for the device that is selected from the plurality of communication channels based at least on the integrated spectral information.Type: ApplicationFiled: April 11, 2018Publication date: August 16, 2018Inventors: Terry F K Ngo, Seung Baek Yi, Erick Kurniawan, Kun Ting Tsai -
Publication number: 20180192422Abstract: Over the air signaling of dynamic frequency selection operating parameters to client devices is disclosed. In an embodiment, a multi-channel master device determines a maximum range value of a radar detection umbrella associated with the multi-channel master device based on a first range representing a range at which the multi-channel master device detects a first radar transmission transmitted by a radar device at a defined transmission power; determines a compliance range value based on a second range representing a range at which the multi-channel master device detects a second radar transmission transmitted by the radar device at a dynamic frequency selection (DFS) compliance threshold transmission power; and determines a margin range value based on a third range representing a range at which the multi-channel master device detects a third radar transmission transmitted by the radar device at a transmission power that is lower than the dynamic frequency selection compliance threshold transmission power.Type: ApplicationFiled: July 12, 2017Publication date: July 5, 2018Inventors: Seung Baek Yi, Kun Ting Tsai, Paul V. Yee, Terry F.K. Ngo, Erick Kurniawan
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Patent number: 9998923Abstract: Access point (AP) management via secure association between APs and mobile devices is facilitated. A method comprises: associating the device with an AP that is locked, wherein the associating is performed via a proximity-based network facilitating communication based on the device and the AP being within a defined distance of one another; unlocking the AP employing a key associated with the device, wherein the unlocking the AP comprises facilitating access to one or more configuration settings of the AP via the device; and enabling a service of the AP and a corresponding service of the device to facilitate change of at least one of the one or more configuration settings via the device. In one embodiment, the associating the device with the AP comprises performing exchange of information between the device and the AP for secure pairing between the device and the AP.Type: GrantFiled: September 15, 2016Date of Patent: June 12, 2018Assignee: NETWORK PERFORMANCE RESEARCH GROUP LLCInventors: Terry Ngo, Erick Kurniawan, Kun Ting Tsai, Seung Baek Yi
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Method and apparatus for directed adaptive control of dynamic channel selection in wireless networks
Patent number: 9999055Abstract: The present invention relates to wireless networks and more specifically to systems and methods for selecting available channels free of radar signals from a plurality of radio frequency channels. In one embodiment, the present invention provides a standalone multi-channel DFS master device and a cloud intelligence device. The standalone multi-channel DFS master device generates spectral information associated with a plurality of communication channels for a device in communication with the standalone multi-channel DFS master device. The cloud intelligence device receives the spectral information via a network device, integrates the spectral information with other spectral information to generate integrated spectral information, and determines a communication channel for the device that is selected from the plurality of communication channels based at least on the integrated spectral information.Type: GrantFiled: August 2, 2016Date of Patent: June 12, 2018Assignee: NETWORK PERFORMANCE RESEARCH GROUP LLCInventors: Terry F K Ngo, Seung Baek Yi, Erick Kurniawan, Kun Ting Tsai -
SYSTEMS, METHODS AND COMPUTER-READABLE STORAGE MEDIA FACILITATING MOBILE DEVICE GUEST NETWORK ACCESS
Publication number: 20180091494Abstract: Mobile device access to a guest network is facilitated. A method comprises: detecting a home network having an associated access point based on the device being within a first defined proximity of the associated access point; and transmitting information indicative of a request to establish a guest network via the associated access point of the home network and providing authentication information for an entity associated with the device. The method also comprises establishing the guest network according to one or more assigned resources based on receipt of an acknowledgement message received from a cloud device, wherein receipt of the acknowledgment message from the cloud device is based on cloud device determination that the entity associated with the device is authenticated and based on receipt of an authorization by an entity associated with the home network.Type: ApplicationFiled: April 21, 2017Publication date: March 29, 2018Inventors: Terry F K Ngo, Seung Baek Yi, Erick Kurniawan, Kun Ting Tsai -
Patent number: 9930670Abstract: The present invention relates to wireless networks and more specifically directed to device location confirmation based on a geolocation proxy. One embodiment includes an exemplary device location confirmation component configured to implement a device location confirmation algorithm using a cloud database configured to comprise device information including location information from the geolocation proxy. Another embodiment includes a device configured to operate in a reduced functionality radio frequency mode until a location can be confirmed through a trusted cloud service.Type: GrantFiled: May 5, 2017Date of Patent: March 27, 2018Assignee: NETWORK PERFORMANCE RESEARCH GROUP LLCInventors: Seung Baek Yi, Terry Ngo, Kun Ting Tsai
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Patent number: 9924518Abstract: The present invention relates to wireless networks and more specifically to systems and methods for selecting available channels free of radar signals from a plurality of radio frequency channels. In one embodiment, the present invention provides for a dynamic frequency selection (“DFS”) master device that can facilitate DFS capabilities for one or more legacy access points that do not have DFS capabilities on their own. The DFS master device can be a device communicably coupled to the access point via a universal serial bus (USB) connection or over Ethernet. In some embodiments, the DFS master device can provide DFS capabilities for a plurality of access points on a network. In other embodiments, the DFS master device can be a separate device that is embeddable on the legacy access point device.Type: GrantFiled: April 10, 2017Date of Patent: March 20, 2018Assignee: NETWORK PERFORMANCE RESEARCH GROUP LLCInventors: Seung Baek Yi, Kun Ting Tsai, Yung-Jui Chen
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Publication number: 20180077576Abstract: Access point (AP) management via secure association between APs and mobile devices is facilitated. A method comprises: associating the device with an AP that is locked, wherein the associating is performed via a proximity-based network facilitating communication based on the device and the AP being within a defined distance of one another; unlocking the AP employing a key associated with the device, wherein the unlocking the AP comprises facilitating access to one or more configuration settings of the AP via the device; and enabling a service of the AP and a corresponding service of the device to facilitate change of at least one of the one or more configuration settings via the device. In one embodiment, the associating the device with the AP comprises performing exchange of information between the device and the AP for secure pairing between the device and the AP.Type: ApplicationFiled: September 15, 2016Publication date: March 15, 2018Inventors: Terry Ngo, Erick Kurniawan, Kun Ting Tsai, Seung Baek Yi