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: 10181962
    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: Grant
    Filed: August 22, 2017
    Date of Patent: January 15, 2019
    Assignee: Aerohive Networks, Inc.
    Inventors: Changming Liu, Yong Kang, Jianlin Zeng, Sreekanth Reddy
  • Publication number: 20180351264
    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 20, 2018
    Publication date: December 6, 2018
    Applicant: Aerohive Networks, Inc.
    Inventors: Changming Liu, George Gang Chen, Hai Lin, Liangfu Zhang
  • Publication number: 20180343145
    Abstract: A network device of a subnet determines predictive roaming information for a wireless client. Predictive roaming information can identify the wireless client and a home network subnet of the wireless client. The network device provides predictive roaming information associated with a wireless client to neighboring subnets. Neighboring subnets store received predictive roaming information, and use the predictive roaming information if the wireless client roams to them.
    Type: Application
    Filed: August 6, 2018
    Publication date: November 29, 2018
    Applicant: Aerohive Networks, Inc.
    Inventors: Changming Liu, Yong Kang, Jianlin Zeng, Sreekanth Reddy
  • Patent number: 10123168
    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: May 10, 2018
    Date of Patent: November 6, 2018
    Assignee: Aerohive Networks, Inc.
    Inventors: Changming Liu, William Hoppin, Chris Scheers
  • Patent number: 10117085
    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: Grant
    Filed: May 19, 2014
    Date of Patent: October 30, 2018
    Assignee: Aerohive Networks, Inc.
    Inventors: Changming Liu, Chris Scheers, Jingsong Fu, Haofeng Kou, Arun K. Goel, Matthew Stuart Gast
  • Publication number: 20180309482
    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: Application
    Filed: June 26, 2018
    Publication date: October 25, 2018
    Applicant: Aerohive Networks, Inc.
    Inventors: Changming Liu, George Gang Chen, Hai Lin, Liangfu Zhang
  • Publication number: 20180287267
    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: June 6, 2018
    Publication date: October 4, 2018
    Applicant: Aerohive Networks, Inc.
    Inventors: Liangfu Zhang, George Gang Chen, Changming Liu, Zhenye Cao
  • Publication number: 20180262872
    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: May 10, 2018
    Publication date: September 13, 2018
    Applicant: Aerohive Networks, Inc.
    Inventors: Changming Liu, William Hoppin, Chris Scheers
  • Publication number: 20180249393
    Abstract: A method and system for selecting a route in a wireless network for the transmission of a data packet between wireless nodes in the network using a modified link-state routing algorithm. A subset of nodes called portal nodes within the network are elected to do the broadcasting for the entire network. A wireless node identifies a unicast route back to its root portal node, and sends a link-state register message to this portal node. These link-state register messages received by each portal node are aggregated by them and are broadcast to each of the wireless nodes for storage. When a data packet is thereafter received by a wireless node from a neighboring node, it detects if the data packet satisfies one of a plurality of predetermined conditions and rebroadcasts the data packet to neighboring wireless nodes if none of the conditions is satisfied.
    Type: Application
    Filed: May 2, 2018
    Publication date: August 30, 2018
    Applicant: Aerohive Networks, Inc.
    Inventors: Yong Kang, Changming Liu
  • Patent number: 10064105
    Abstract: A network device of a subnet determines predictive roaming information for a wireless client. Predictive roaming information can identify the wireless client and a home network subnet of the wireless client. The network device provides predictive roaming information associated with a wireless client to neighboring subnets. Neighboring subnets store received predictive roaming information, and use the predictive roaming information if the wireless client roams to them.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: August 28, 2018
    Assignee: Aerohive Networks, Inc.
    Inventors: Changming Liu, Yong Kang, Jianlin Zeng, Sreekanth Reddy
  • Publication number: 20180227199
    Abstract: Device analytics at a local infrastructure network using fog networking techniques is disclosed. A specific implementation includes a fog networking-based Internet of Things (“IoT”) device analytics subsystem and multi-protocol infrastructure network devices. An example of operation includes analyzing IoT device data through fog networking at a local infrastructure network device and performing load balancing across network devices for analyzing IoT device data through fog networking.
    Type: Application
    Filed: February 8, 2017
    Publication date: August 9, 2018
    Applicant: Aerohive Networks, Inc.
    Inventors: Changming Liu, Junjie Ma, Yufeng Wu, Chris Scheers
  • Patent number: 10033112
    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: February 7, 2014
    Date of Patent: July 24, 2018
    Assignee: Aerohive Networks, Inc.
    Inventors: Changming Liu, George Gang Chen, Hai Lin, Liangfu Zhang
  • Patent number: 10014915
    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: November 12, 2013
    Date of Patent: July 3, 2018
    Assignee: Aerohive Networks, Inc.
    Inventors: Changming Liu, George Gang Chen, Hai Lin, Liangfu Zhang
  • Patent number: 10003134
    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 13, 2017
    Date of Patent: June 19, 2018
    Assignee: Aerohive Networks, Inc.
    Inventors: Liangfu Zhang, George Gang Chen, Changming Liu, Zhenye Cao
  • Patent number: 9992619
    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: August 21, 2014
    Date of Patent: June 5, 2018
    Assignee: Aerohive Networks, Inc.
    Inventors: Changming Liu, William Hoppin, Chris Scheers
  • Publication number: 20180152934
    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: January 8, 2018
    Publication date: May 31, 2018
    Applicant: Aerohive Networks, Inc.
    Inventors: Peter Wu, Sreekanth Reddy, Jianlin Zeng, Changming Liu
  • Publication number: 20180152380
    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: Application
    Filed: January 23, 2018
    Publication date: May 31, 2018
    Applicant: Aerohive Networks, Inc.
    Inventors: Huizhao Wang, Changming Liu, Peter Wu
  • Publication number: 20180092151
    Abstract: Techniques for managing IoT devices through multi-protocol infrastructure network devices are disclosed. A system utilizing such techniques can include a multi-protocol infrastructure network device and a WAN based IoT device management system and various network device based engines. A method utilizing such techniques can include management according to WAN based IoT device policies and LAN based IoT device policies.
    Type: Application
    Filed: September 27, 2016
    Publication date: March 29, 2018
    Applicant: Aerohive Networks, Inc.
    Inventors: Changming Liu, Junjie Ma, Yufeng Wu, Chris Scheers
  • Patent number: D823284
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: July 17, 2018
    Assignees: Aerohive Networks, Inc., Wistron NeWeb Corporation
    Inventors: Liangfu Zhang, George Gang Chen, Changming Liu, Zhenye Cao, Shang-Sian You, Yu Tao, Chi-Kang Su
  • Patent number: D823837
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: July 24, 2018
    Assignees: Aerohive Networks, Inc., Wistron NeWeb Corporation
    Inventors: Liangfu Zhang, George Gang Chen, Changming Liu, Zhenye Cao, Shang-Sian You, Yu Tao, Chi-Kang Su