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: 10694319Abstract: 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: GrantFiled: November 6, 2018Date of Patent: June 23, 2020Assignee: Extreme Networks, Inc.Inventors: Changming Liu, William Hoppin, Chris Scheers
-
Patent number: 10693243Abstract: 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: GrantFiled: June 6, 2018Date of Patent: June 23, 2020Assignee: Extreme Networks, Inc.Inventors: Liangfu Zhang, George Gang Chen, Changming Liu, Zhenye Cao
-
Publication number: 20200045713Abstract: 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: ApplicationFiled: August 20, 2019Publication date: February 6, 2020Inventors: Huizhao Wang, Chris Scheers, Changming Liu
-
Publication number: 20200044981Abstract: 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: ApplicationFiled: August 20, 2019Publication date: February 6, 2020Applicant: Aerohive Networks, Inc.Inventors: Dalun Bao, Changming Liu
-
Patent number: 10536803Abstract: 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: GrantFiled: October 24, 2017Date of Patent: January 14, 2020Assignee: Aerohive Networks, Inc.Inventors: Changming Liu, Chris Scheers, Jingsong Fu, Haofeng Kou, Arun K. Goel, Matthew Gast, Joseph Fraher
-
Publication number: 20190357003Abstract: 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: ApplicationFiled: November 6, 2018Publication date: November 21, 2019Applicant: Aerohive Networks, Inc.Inventors: Changming Liu, William Hoppin, Chris Scheers
-
Publication number: 20190334586Abstract: 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: ApplicationFiled: July 5, 2019Publication date: October 31, 2019Applicant: Aerohive Networks, Inc.Inventors: Changming Liu, George Gang Chen, Hai Lin, Liangfu Zhang
-
Publication number: 20190281079Abstract: 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: ApplicationFiled: March 11, 2019Publication date: September 12, 2019Inventors: Zhang Xu, Changming Liu
-
Patent number: 10412006Abstract: 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: GrantFiled: January 23, 2018Date of Patent: September 10, 2019Assignee: Aerohive Networks, Inc.Inventors: Huizhao Wang, Changming Liu, Peter Wu
-
Publication number: 20190261339Abstract: 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: ApplicationFiled: February 26, 2019Publication date: August 22, 2019Applicant: Aerohive Networks, Inc.Inventors: Peter Wu, Sreekanth Reddy, Jianlin Zeng, Changming Liu
-
Patent number: 10389650Abstract: 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: GrantFiled: January 17, 2014Date of Patent: August 20, 2019Assignee: Aerohive Networks, Inc.Inventors: Dalun Bao, Changming Liu
-
Patent number: 10390353Abstract: 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: GrantFiled: June 27, 2017Date of Patent: August 20, 2019Assignee: Aerohive Networks, Inc.Inventors: Huizhao Wang, Chris Scheers, Changming Liu
-
Patent number: 10348372Abstract: 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: GrantFiled: July 20, 2018Date of Patent: July 9, 2019Assignee: Aerohive Networks, Inc.Inventors: Changming Liu, George Gang Chen, Hai Lin, Liangfu Zhang
-
Patent number: 10326707Abstract: 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: GrantFiled: January 17, 2014Date of Patent: June 18, 2019Assignee: Aerohive Networks, Inc.Inventors: Dalun Bao, Changming Liu
-
Publication number: 20190165969Abstract: 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: ApplicationFiled: January 15, 2019Publication date: May 30, 2019Applicant: Aerohive Networks, Inc.Inventors: Changming Liu, Yong Kang, Jianlin Zeng, Sreekanth Reddy
-
Publication number: 20190157774Abstract: 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: ApplicationFiled: January 28, 2019Publication date: May 23, 2019Applicant: Aerohive Networks, Inc.Inventors: Liangfu Zhang, George Gang Chen, Changming Liu, Zhenye Cao
-
Patent number: 10298296Abstract: 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: GrantFiled: June 26, 2018Date of Patent: May 21, 2019Assignee: Aerohive Networks, Inc.Inventors: Changming Liu, George Gang Chen, Hai Lin, Liangfu Zhang
-
Publication number: 20190069158Abstract: 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: ApplicationFiled: October 29, 2018Publication date: February 28, 2019Applicant: Aerohive Networks, Inc.Inventors: Changming Liu, Chris Scheers, Jingsong FU, Haofeng Kou, Arun K. Goel, Matthew Stuart Gast
-
Patent number: 10219254Abstract: 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: GrantFiled: January 8, 2018Date of Patent: February 26, 2019Assignee: Aerohive Networks, Inc.Inventors: Peter Wu, Sreekanth Reddy, Jianlin Zeng, Changming Liu
-
Patent number: 10193239Abstract: 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: GrantFiled: October 23, 2017Date of Patent: January 29, 2019Assignee: Aerohive Networks, Inc.Inventors: Liangfu Zhang, George Gang Chen, Changming Liu, Zhenye Cao