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).
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Publication number: 20180062874Abstract: 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: August 22, 2017Publication date: March 1, 2018Inventors: Changming Liu, Yong Kang, Jianlin Zeng, Sreekanth Reddy
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Patent number: 9900251Abstract: 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: July 12, 2010Date of Patent: February 20, 2018Assignee: AEROHIVE NETWORKS, INC.Inventors: Huizhao Wang, Changming Liu, Peter Wu
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Publication number: 20180048077Abstract: 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: October 23, 2017Publication date: February 15, 2018Applicant: Aerohive Networks, Inc.Inventors: Liangfu Zhang, George Gang Chen, Changming Liu, Zhenye Cao
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Publication number: 20180048999Abstract: 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: ApplicationFiled: October 24, 2017Publication date: February 15, 2018Applicant: Aerohive Networks, Inc.Inventors: Changming Liu, Chris Scheers, Jingsong Fu, Haofeng Kou, Arun K. Goel, Matthew Gast, Joseph Fraher
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Patent number: 9867167Abstract: 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: August 22, 2016Date of Patent: January 9, 2018Assignee: Aerohive Networks, Inc.Inventors: Peter Wu, Sreekanth Reddy, Jianlin Zeng, Changming Liu
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Patent number: 9826591Abstract: A button backlight processing method and apparatus and a terminal device. The button backlight processing method includes receiving an instruction for turning on button backlight; obtaining a button backlight parameter according to the instruction, where the button backlight parameter is corresponding to a current theme interface of a terminal device; and turning on the button backlight according to the button backlight parameter. The embodiments of the present disclosure achieve a color diversity of button backlight, and meet individualized requirements of users.Type: GrantFiled: December 28, 2015Date of Patent: November 21, 2017Assignee: HUAWEI DEVICE (DONGGUAN) CO., LTD.Inventors: Zhihua Li, Changming Liu, Tao Yan
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Patent number: 9820316Abstract: Various implementations described herein relate to routing network data traffic using network tunnels. In some implementations, one or more tunnels are established between a remote gateway device and a central gateway system. The central gateway system receives data traffic-to-tunnel information from the remote gateway device, and the central gateway system incorporates the data traffic-to-tunnel information in a data traffic-to-tunnel mapping. The data traffic-to-tunnel information comprises n-tuple of network flow information, network flow tags, application-to-tunnel binding information, or the like. The central gateway system receives first data traffic from the remote gateway and forwards the first data traffic to a server. Subsequently, the central gateway system receives second data traffic and forwards the first data traffic to the remote gateway device over one or more select tunnels selected from the established tunnels.Type: GrantFiled: March 17, 2014Date of Patent: November 14, 2017Assignee: Aerohive Networks, Inc.Inventors: Jun Tie, Changming Liu
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Patent number: 9814055Abstract: 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: March 19, 2015Date of Patent: November 7, 2017Assignee: Aerohive Networks, Inc.Inventors: Huizhao Wang, Chris Scheers, Changming Liu
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Patent number: 9812791Abstract: 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: March 10, 2016Date of Patent: November 7, 2017Assignee: Aerohive Networks, Inc.Inventors: Liangfu Zhang, George Gang Chen, Changming Liu, Zhenye Cao
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Patent number: 9813862Abstract: 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: May 18, 2015Date of Patent: November 7, 2017Assignee: Aerohive Networks, Inc.Inventors: Changming Liu, Chris Scheers, Jingsong Fu, Haofeng Kou, Arun K. Goel, Matthew Stuart Gast, Joseph R. Fraher
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Publication number: 20170302007Abstract: 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: June 13, 2017Publication date: October 19, 2017Applicant: Aerohive Networks, Inc.Inventors: Liangfu Zhang, George Gang Chen, Changming Liu, Zhenye Cao
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Patent number: 9794169Abstract: Various implementations described herein relate to routing network data traffic using network tunnels. In some implementations, one or more tunnels are established between a remote gateway device and a central gateway device central gateway system. The remote gateway device can receive data traffic from one or more client devices and analyzed the data traffic. Based at least in part on the resulting analysis, the remote gateway device identified an application or an application type associated with the data traffic. The remote gateway device can select one or more select tunnels, from the one or more tunnels, based at least in part on the identification of the application or the application type associated with the data traffic. Eventually, the remote gateway device can route the data traffic to the central gateway system using the one or more select tunnels.Type: GrantFiled: March 17, 2014Date of Patent: October 17, 2017Assignee: Aerohive Networks, Inc.Inventors: Jun Tie, Changming Liu
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Publication number: 20170295586Abstract: 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: June 27, 2017Publication date: October 12, 2017Applicant: Aerohive Networks, Inc.Inventors: Huizhao Wang, Chris Scheers, Changming Liu
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Patent number: 9787500Abstract: 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: GrantFiled: March 14, 2016Date of Patent: October 10, 2017Assignee: Aerohive Networks, Inc.Inventors: Changming Liu, Yong Kang, Jianlin Zeng, Sreekanth Reddy
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Publication number: 20170230824Abstract: Preshared keys are assigned to client devices, users, or user groups. The set of valid preshared keys or keys derived therefrom is distributed to network devices such as wireless access points. A client device attempts to establish a secure network connection with a network device using its assigned preshared key. A network device identifies the client device's preshared key by selecting a candidate key from its set of valid preshared keys. The network device determines a validation cryptographic checksum based on the selected candidate key. If the validation cryptographic checksum matches the client's cryptographic checksum, the network device establishes a secure network connection with the client device using this candidate key. If the validation cryptographic checksum does not match the cryptographic checksum provided by the client device, the network device repeats this comparison using different candidate keys selected from its set of valid preshared keys until a match is found.Type: ApplicationFiled: April 25, 2017Publication date: August 10, 2017Applicant: Aerohive Networks, Inc.Inventors: Mingliang Li, Changming Liu
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Patent number: 9705207Abstract: 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: September 3, 2015Date of Patent: July 11, 2017Assignee: Aerohive Networks, Inc.Inventors: Liangfu Zhang, George Gang Chen, Changming Liu, Zhenye Cao
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Patent number: 9674892Abstract: Preshared keys are assigned to client devices, users, or user groups. The set of valid preshared keys or keys derived therefrom is distributed to network devices such as wireless access points. A client device attempts to establish a secure network connection with a network device using its assigned preshared key. A network device identifies the client device's preshared key by selecting a candidate key from its set of valid preshared keys. The network device determines a validation cryptographic checksum based on the selected candidate key. If the validation cryptographic checksum matches the client's cryptographic checksum, the network device establishes a secure network connection with the client device using this candidate key. If the validation cryptographic checksum does not match the cryptographic checksum provided by the client device, the network device repeats this comparison using different candidate keys selected from its set of valid preshared keys until a match is found.Type: GrantFiled: June 16, 2009Date of Patent: June 6, 2017Assignee: Aerohive Networks, Inc.Inventors: Mingliang Li, Changming Liu
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Publication number: 20170134991Abstract: 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: ApplicationFiled: January 23, 2017Publication date: May 11, 2017Applicant: Aerohive Networks, Inc.Inventors: Changming Liu, Yong Kang, Jianlin Zeng, Sreekanth Reddy
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Patent number: 9590822Abstract: 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: GrantFiled: April 14, 2015Date of Patent: March 7, 2017Assignee: Aerohive Networks, Inc.Inventors: Changming Liu, Yong Kang, Jianlin Zeng, Sreekanth Reddy
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Patent number: 9572135Abstract: 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: April 10, 2014Date of Patent: February 14, 2017Assignee: Aerohive Networks, Inc.Inventors: Peter Wu, Sreekanth Reddy, Jianlin Zeng, Changming Liu