Patents by Inventor Changming Liu

Changming Liu 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: 10694319
    Abstract: A proximity beacon signal transmitted by a network device-coupled proximity beacon transmitter is received at a network device. A RSSI reporting message is generated at the network device based on the proximity beacon signal. A position of the network device-coupled proximity beacon transmitter with respect to the network device is determined using the RSSI reporting message. A location of the network device within a region is determined using the RSSI reporting message and network device map data for the region. The location of the network device-coupled proximity beacon transmitter in the region is determined based on the position of the network device-coupled proximity beacon transmitter with respect to the network device and the location of the network device within the region.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: June 23, 2020
    Assignee: Extreme Networks, Inc.
    Inventors: Changming Liu, William Hoppin, Chris Scheers
  • Patent number: 10693243
    Abstract: A network device comprising, a first radio module configured to transmit and receive first radio signals in a first frequency band, a first antenna array configured to transmit and receive the first radio signals for the first radio module in the first frequency band, a second radio module configured to transmit and receive second radio signals in the first frequency band, a second antenna array configured to transmit and receive the second radio signals for the second radio module in the first frequency band, wherein, in operation, the first radio module and the second radio modules function concurrently using the first frequency band while at least 40 dB of antenna isolation is maintained between the first antenna array and the second antenna array.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: June 23, 2020
    Assignee: Extreme Networks, Inc.
    Inventors: Liangfu Zhang, George Gang Chen, Changming Liu, Zhenye Cao
  • Publication number: 20200045713
    Abstract: Wireless networking devices scan for available channels and gather data about the channels and the RF environment. Using this information, each wireless networking device determines a cost value for each available channel and a quality value for its overall RF neighborhood. Each wireless networking device select the channel with the best cost value as a candidate channel for use. The wireless networking devices may submit channel requests to the arbiter for approval. If two or more wireless networking devices are requesting the same channel, the arbiter assigns the channel to the wireless networking device with the worst RF neighborhood quality. The arbiter informs the wireless networking devices if their channel requests are approved. If a wireless networking device's channel request is not approved, the wireless networking device will rescan the remaining available channels to select a different candidate channel to be approved.
    Type: Application
    Filed: August 20, 2019
    Publication date: February 6, 2020
    Inventors: Huizhao Wang, Chris Scheers, Changming Liu
  • Publication number: 20200044981
    Abstract: Techniques and systems for establishing and maintaining networks. The technique includes assigning a network device to an interregional redirector system and load balancer systems. The network device can be assigned based upon the regions or subregions of the network device. The technique includes the load balancer systems assigning the network device to network device management engines. The status of the network device management engines can be monitored to determine if one of the network device management engines has failed. In the event that a network device management engine has failed, the network device can be assigned to a different network device management engine.
    Type: Application
    Filed: August 20, 2019
    Publication date: February 6, 2020
    Applicant: Aerohive Networks, Inc.
    Inventors: Dalun Bao, Changming Liu
  • Patent number: 10536803
    Abstract: Management of a proximity beacon transmitter using a network device. Operational characteristics are generated for a proximity beacon transmitter coupled to a network device. The proximity beacon is configured through the network device. It is determined if the proximity beacon transmitter is operating according to the operational characteristics generated for the proximity beacon transmitter. The proximity beacon transmitter is reconfigured to operate according to the operational characteristics if it is determined that the proximity beacon transmitter is operating in nonconformity with the operational characteristics.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: January 14, 2020
    Assignee: Aerohive Networks, Inc.
    Inventors: Changming Liu, Chris Scheers, Jingsong Fu, Haofeng Kou, Arun K. Goel, Matthew Gast, Joseph Fraher
  • Publication number: 20190357003
    Abstract: A proximity beacon signal transmitted by a network device-coupled proximity beacon transmitter is received at a network device. A RSSI reporting message is generated at the network device based on the proximity beacon signal. A position of the network device-coupled proximity beacon transmitter with respect to the network device is determined using the RSSI reporting message. A location of the network device within a region is determined using the RSSI reporting message and network device map data for the region. The location of the network device-coupled proximity beacon transmitter in the region is determined based on the position of the network device-coupled proximity beacon transmitter with respect to the network device and the location of the network device within the region.
    Type: Application
    Filed: November 6, 2018
    Publication date: November 21, 2019
    Applicant: Aerohive Networks, Inc.
    Inventors: Changming Liu, William Hoppin, Chris Scheers
  • Publication number: 20190334586
    Abstract: A technique for improving wireless communication characteristics involving matching transmitter antenna patterns to receiver antenna patterns. In a specific implementation, the transmitter antenna pattern adapts to changing parameters, such as when a smartphone is initially held in a first orientation and is later held in a second orientation. Because the transmitter antenna patterns match the receiver antenna patterns, signal quality between stations improves. In some implementations, antennas are organized and mounted to maximize spatial diversity to cause peak gains in different directions.
    Type: Application
    Filed: July 5, 2019
    Publication date: October 31, 2019
    Applicant: Aerohive Networks, Inc.
    Inventors: Changming Liu, George Gang Chen, Hai Lin, Liangfu Zhang
  • Publication number: 20190281079
    Abstract: A non-transitory computer-readable medium having a program stored thereon that, when executed by one or more processors, directs a computing system to secure a communication network. The program comprises a traffic inspection engine, a domain generation algorithm (DGA) inspection engine, and a message bus communicationally coupling the traffic inspection engine and the DGA inspection engine. The traffic inspection engine is configured to identify if a traffic session containing a domain name system (DNS) request and/or response in a communication network includes a DGA generated domain and send information about the identified DGA generated domain to the DGA inspection engine via the message bus. The DGA inspection engine is configured to verify if the identified DGA generated domain is registered, and send information about the registered DGA domain to the traffic inspection engine via the message bus.
    Type: Application
    Filed: March 11, 2019
    Publication date: September 12, 2019
    Inventors: Zhang Xu, Changming Liu
  • Patent number: 10412006
    Abstract: Minimum guaranteed wireless network bandwidth is provided to client network devices by monitoring the performance of network connections to identify client network devices experiencing network congestion. Congested network connections are then analyzed to determine the source of the network congestion. Depending upon the source of the network congestion, an embodiment of the invention may undertake steps to either improve the quality of the network connection or to mitigate the impact of this network connection on other network connections. High quality network connections may be allocated additional bandwidth, airtime, or other resources to reduce the network congestion. Low quality network connections are not allocated additional bandwidth, airtime, or other resources. Instead, the impact of this network connection on the other network connections is mitigated.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: September 10, 2019
    Assignee: Aerohive Networks, Inc.
    Inventors: Huizhao Wang, Changming Liu, Peter Wu
  • Publication number: 20190261339
    Abstract: Airtime usage may be used as a factor in controlling network traffic flow to and from client devices via a wireless network interface. Received packets or other data are assigned to a quality of service profile. Additionally, a cost value for communicating the received data is determined at least in part based on an actual or estimated airtime usage for the received packet. The cost value is used to allocate wireless network airtime to data. The allocation of wireless network airtime may be varied dynamically based on operating conditions. The cost value may be based on factors including the airtime used to communicate data; whether the data is a retransmission; and wireless network overhead. The cost value of data may also be different depending on whether the data is being sent from a client device or to a client device.
    Type: Application
    Filed: February 26, 2019
    Publication date: August 22, 2019
    Applicant: Aerohive Networks, Inc.
    Inventors: Peter Wu, Sreekanth Reddy, Jianlin Zeng, Changming Liu
  • Patent number: 10389650
    Abstract: Techniques and systems for establishing and maintaining networks. The technique includes assigning a network device to an interregional redirector system and load balancer systems. The network device can be assigned based upon the regions or subregions of the network device. The technique includes the load balancer systems assigning the network device to network device management engines. The status of the network device management engines can be monitored to determine if one of the network device management engines has failed. In the event that a network device management engine has failed, the network device can be assigned to a different network device management engine.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: August 20, 2019
    Assignee: Aerohive Networks, Inc.
    Inventors: Dalun Bao, Changming Liu
  • Patent number: 10390353
    Abstract: Wireless networking devices scan for available channels and gather data about the channels and the RF environment. Using this information, each wireless networking device determines a cost value for each available channel and a quality value for its overall RF neighborhood. Each wireless networking device select the channel with the best cost value as a candidate channel for use. The wireless networking devices may submit channel requests to the arbiter for approval. If two or more wireless networking devices are requesting the same channel, the arbiter assigns the channel to the wireless networking device with the worst RF neighborhood quality. The arbiter informs the wireless networking devices if their channel requests are approved. If a wireless networking device's channel request is not approved, the wireless networking device will rescan the remaining available channels to select a different candidate channel to be approved.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: August 20, 2019
    Assignee: Aerohive Networks, Inc.
    Inventors: Huizhao Wang, Chris Scheers, Changming Liu
  • Patent number: 10348372
    Abstract: A technique for improving wireless communication characteristics involving matching transmitter antenna patterns to receiver antenna patterns. In a specific implementation, the transmitter antenna pattern adapts to changing parameters, such as when a smartphone is initially held in a first orientation and is later held in a second orientation. Because the transmitter antenna patterns match the receiver antenna patterns, signal quality between stations improves. In some implementations, antennas are organized and mounted to maximize spatial diversity to cause peak gains in different directions.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: July 9, 2019
    Assignee: Aerohive Networks, Inc.
    Inventors: Changming Liu, George Gang Chen, Hai Lin, Liangfu Zhang
  • Patent number: 10326707
    Abstract: Techniques and systems for establishing and maintaining networks. The technique includes assigning a network device to an interregional redirector system and load balancer systems. The network device can be assigned based upon the regions or subregions of the network device. The technique includes the load balancer systems assigning the network device to network device management engines. The status of the network device management engines can be monitored to determine if one of the network device management engines has failed. In the event that a network device management engine has failed, the network device can be assigned to a different network device management engine.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: June 18, 2019
    Assignee: Aerohive Networks, Inc.
    Inventors: Dalun Bao, Changming Liu
  • Publication number: 20190165969
    Abstract: Wireless access points detect neighboring wireless access points in different subnets. Upon connecting with a wireless client, a wireless access point determines predictive roaming information for the wireless client. Predictive roaming information identifies the wireless client; its home network subnet; and includes connection information associated with the wireless client. The wireless access point forwards the predictive roaming information associated with a wireless client to neighboring wireless access points while the wireless client is still connected with the wireless access point. Neighboring wireless access points store received predictive roaming information. Upon connecting with a wireless client, a neighboring wireless access point determines if the wireless client matches the stored predictive roaming information.
    Type: Application
    Filed: January 15, 2019
    Publication date: May 30, 2019
    Applicant: Aerohive Networks, Inc.
    Inventors: Changming Liu, Yong Kang, Jianlin Zeng, Sreekanth Reddy
  • Publication number: 20190157774
    Abstract: A network device comprising, a first radio module configured to transmit and receive first radio signals in a first frequency band, a first antenna array configured to transmit and receive the first radio signals for the first radio module in the first frequency band, a second radio module configured to transmit and receive second radio signals in the first frequency band, a second antenna array configured to transmit and receive the second radio signals for the second radio module in the first frequency band, wherein, in operation, the first radio module and the second radio modules function concurrently using the first frequency band while at least 40 dB of antenna isolation is maintained between the first antenna array and the second antenna array.
    Type: Application
    Filed: January 28, 2019
    Publication date: May 23, 2019
    Applicant: Aerohive Networks, Inc.
    Inventors: Liangfu Zhang, George Gang Chen, Changming Liu, Zhenye Cao
  • Patent number: 10298296
    Abstract: A technique for improving wireless communication characteristics involving matching transmitter antenna patterns to receiver antenna patterns. In a specific implementation, the transmitter antenna pattern adapts to changing parameters, such as when a smartphone is initially held in a first orientation and is later held in a second orientation. Because the transmitter antenna pattern matches receiver antenna patterns, signal quality between stations improves. In some implementations, antennas are organized and mounted to maximize spatial diversity to cause peak gains in different directions.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: May 21, 2019
    Assignee: Aerohive Networks, Inc.
    Inventors: Changming Liu, George Gang Chen, Hai Lin, Liangfu Zhang
  • Publication number: 20190069158
    Abstract: A technique for deploying proximity beacons involves coupling proximity beacon transmitters and/or hubs to an enterprise network device. The coupling can be by way of physically connecting communication interfaces of the network device and the proximity beacon transmitter or hub. In some implementations, the communication interface can be implemented as a USB interface. In some implementations, the communication interface can be embedded within the network device, such that the communication interface can provide the physical connection in the form of an embedded or internal connection.
    Type: Application
    Filed: October 29, 2018
    Publication date: February 28, 2019
    Applicant: Aerohive Networks, Inc.
    Inventors: Changming Liu, Chris Scheers, Jingsong FU, Haofeng Kou, Arun K. Goel, Matthew Stuart Gast
  • Patent number: 10219254
    Abstract: Airtime usage may be used as a factor in controlling network traffic flow to and from client devices via a wireless network interface. Received packets or other data are assigned to a quality of service profile. Additionally, a cost value for communicating the received data is determined at least in part based on an actual or estimated airtime usage for the received packet. The cost value is used to allocate wireless network airtime to data. The allocation of wireless network airtime may be varied dynamically based on operating conditions. The cost value may be based on factors including the airtime used to communicate data; whether the data is a retransmission; and wireless network overhead. The cost value of data may also be different depending on whether the data is being sent from a client device or to a client device.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: February 26, 2019
    Assignee: Aerohive Networks, Inc.
    Inventors: Peter Wu, Sreekanth Reddy, Jianlin Zeng, Changming Liu
  • Patent number: 10193239
    Abstract: A network device comprising, a first radio module configured to transmit and receive first radio signals in a first frequency band, a first antenna array configured to transmit and receive the first radio signals for the first radio module in the first frequency band, a second radio module configured to transmit and receive second radio signals in the first frequency band, a second antenna array configured to transmit and receive the second radio signals for the second radio module in the first frequency band, wherein, in operation, the first radio module and the second radio modules function concurrently using the first frequency band while at least 40 dB of antenna isolation is maintained between the first antenna array and the second antenna array.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: January 29, 2019
    Assignee: Aerohive Networks, Inc.
    Inventors: Liangfu Zhang, George Gang Chen, Changming Liu, Zhenye Cao