Patents by Inventor Xiaolin Lu

Xiaolin Lu 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).

  • Publication number: 20190245844
    Abstract: Authentication of a networked device with limited computational resources for secure communications over a network. Authentication of the device begins with the supplicant node transmitting a signed digital certificate with its authentication credentials to a proxy node. Upon verifying the certificate, the proxy node then authenticates the supplicant's credentials with an authentication server accessible over the network, acting as a proxy for the supplicant node. Typically, this verification includes decryption according to a public/private key scheme. Upon successful authentication, the authentication server creates a session key for the supplicant node and communicates it to the proxy node. The proxy node encrypts the session key with a symmetric key, and transmits the encrypted session key to the supplicant node which, after decryption, uses the session key for secure communications. In some embodiments, the authentication server encrypts the session key with the symmetric key.
    Type: Application
    Filed: January 18, 2019
    Publication date: August 8, 2019
    Inventors: Kumaran Vijayasankar, Oliver Shih, Arvind K. Raghu, Ramanuja Vedantham, Xiaolin Lu
  • Patent number: 10334087
    Abstract: In a disclosed embodiment, a method for communication in a network includes receiving, at a first device registered to the network, a physical layer (PHY) frame that includes a PHY header and a MAC header. The PHY frame may further include a MAC payload. The PHY header includes a destination address field. The method further includes comparing a network address of the first device to the destination address field to determine whether the destination address field stores a value having the same number of bits as the network address. When the comparison indicates that the value stored by the destination address field does not have the same number of bits as the network address, the method skips decoding the MAC header and the MAC payload.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: June 25, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Gang Xu, Ramanuja Vedantham, Kumaran Vijayasankar, Anand G Dabak, Tarkesh Pande, Il Han Kim, Xiaolin Lu
  • Publication number: 20190185502
    Abstract: There are provided compounds of Formula (A) and pharmaceutically acceptable salts and esters thereof, and pharmaceutical compositions thereof, used for the prevention or treatment in a mammal of joint and bone disorders such as arthritis and osteoporosis.
    Type: Application
    Filed: December 17, 2018
    Publication date: June 20, 2019
    Inventors: Jiasheng LU, Jiamin GU, Xiang JI, Daiqiang HU, Xiuchun ZHANG, Xinyong LV, Jinchao AI, Dongdong WU, Xianqi KONG, Lin WANG, Dongqing ZHU, Xiaolin HE
  • Publication number: 20190132244
    Abstract: A method and apparatus for dynamic medium switching in a hybrid network. A method for packet transmission by a combo device includes maintaining a wireless network confidence rating value that is indicative of packet transfer reliability of a wireless network accessed by the device. A wired network confidence rating value that is indicative of packet transfer reliability of a wired network accessed by the device is also maintained. One of the wireless network and the wired network to be used for initial transmission of the data packet is selected based on which of the wireless confidence rating value and the wired confidence rating value is indicative of a higher likelihood of the packet being successfully transmitted. The packet is routed to be transmitted via the selected network.
    Type: Application
    Filed: October 1, 2018
    Publication date: May 2, 2019
    Inventors: Ramanuja Vedantham, Jiun-Ren Lin, Xiaolin Lu
  • Patent number: 10270492
    Abstract: In accordance with disclosed embodiments, a first power line communication (PLC) device connected to a PLC network includes channel control logic that assigns a first channel of the PLC network for transmission on a power line of PLC data packets between the first PLC device and a second PLC device connected to the PLC network and assigns a second channel of the PLC network for transmission on the power line of PLC data packets between the first PLC device and the third PLC device connected to the PLC network. The PLC device includes a transceiver that receives and transmits PLC data packets on the PLC network and which operates as a bridge device that communicates on both the first and second channels to pass PLC data packets between the second PLC device and the third PLC device.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: April 23, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Yanjun Sun, Minghua Fu, Xiaolin Lu
  • Publication number: 20190097679
    Abstract: A method of generating a channel hopping sequence for a link in a wireless sensor network is provided that includes receiving performance quality data for respective frequency channels of a plurality of frequency channels in the link in a monitoring system, determining a channel quality indicator (CQI) by the monitoring system for each frequency channel based on the respective performance quality data, and determining a repetition factor by the monitoring system for each frequency channel based on the respective CQI, wherein a repetition factor for a frequency channel indicates a number of times the frequency channel is repeated in the channel hopping sequence.
    Type: Application
    Filed: September 20, 2018
    Publication date: March 28, 2019
    Inventors: Jyotirmoy Banik, Il Han Kim, Jianwei Zhou, Xiaolin Lu
  • Publication number: 20190069315
    Abstract: A network includes a parent node and at least one child node configured to communicate with the parent node via a wireless network protocol. The parent node includes a broadcast coordinator to transmit a broadcast message from the parent node to the child node at predetermined time intervals according to the wireless network protocol. A scheduler generates a scheduling packet that is communicated in the broadcast message. The scheduling packet includes a data field to instruct each child node to activate and receive data communicated from the parent node in a prescribed time slot following the broadcast message that is defined by the scheduling packet.
    Type: Application
    Filed: October 30, 2018
    Publication date: February 28, 2019
    Inventors: Arvind K. Raghu, Ariton E. Xhafa, Ramanuja Vedantham, Xiaolin Lu
  • Publication number: 20190052716
    Abstract: Disclosed embodiments include a network device having a split network stack that includes a physical (PHY) layer associated with first and second media access control (MAC) protocol sublayers, a processing device, and memory storing instructions that, when executed by the processing device, cause the processing device to select a route through the split network stack that includes one of the first and second MAC protocol sublayers but not the other one of the first and second MAC protocol sublayers.
    Type: Application
    Filed: October 12, 2018
    Publication date: February 14, 2019
    Inventors: Xiaolin Lu, Robert Liang, Mehul Soman, Kumaran Vijayasankar, Ramanuja Vedantham
  • Publication number: 20190044751
    Abstract: Systems and methods for carrier sense multiple access (CSMA) protocols for power line communications (PLC) are described. In some embodiments, a method may include performing a virtual carrier sensing operation and, in response to the virtual carrier sensing operation indicating that a communication channel is idle, calculating a contention window. The method may also include performing a physical carrier sensing operation subsequent to the virtual carrier sensing operation, the physical carrier sensing operation based, at least in part, upon the contention window. In response to the physical carrier sensing operation indicating that the communication channel is idle, the method may then include transmitting data over the channel. In other embodiments, another method may include determining that a data transmission is a unicast transmission and that an acknowledgement message has not been received.
    Type: Application
    Filed: October 8, 2018
    Publication date: February 7, 2019
    Inventors: Shu Du, Robert W. Liang, Xiaolin Lu
  • Patent number: 10187376
    Abstract: Authentication of a networked device with limited computational resources for secure communications over a network. Authentication of the device begins with the supplicant node transmitting a signed digital certificate with its authentication credentials to a proxy node. Upon verifying the certificate, the proxy node then authenticates the supplicant's credentials with an authentication server accessible over the network, acting as a proxy for the supplicant node. Typically, this verification includes decryption according to a public/private key scheme. Upon successful authentication, the authentication server creates a session key for the supplicant node and communicates it to the proxy node. The proxy node encrypts the session key with a symmetric key, and transmits the encrypted session key to the supplicant node which, after decryption, uses the session key for secure communications. In some embodiments, the authentication server encrypts the session key with the symmetric key.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: January 22, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Kumaran Vijayasankar, Oliver Shih, Arvind K. Raghu, Ramanuja Vedantham, Xiaolin Lu
  • Patent number: 10117267
    Abstract: A network includes a parent node and at least one child node that is configured to communicate with the parent node via a wireless network protocol. The parent node includes a broadcast coordinator to transmit a broadcast message from the parent node to the child node at predetermined time intervals according to the wireless network protocol. A scheduler generates a scheduling packet that is communicated in the broadcast message. The scheduling packet includes a data field to instruct each child node to activate and receive data communicated from the parent node in a prescribed time slot following the broadcast message that is defined by the scheduling packet.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: October 30, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Arvind K. Raghu, Ariton E. Xhafa, Ramanuja Vedantham, Xiaolin Lu
  • Patent number: 10104192
    Abstract: A communication system and method includes receiving payload data of first and second media access control (MAC) frames. A MAC-level protocol is identified in response to the indication of the selected network for each of the first and second MAC frames. The payload data of the first and second MAC frames is transmitted and/or received across respective networks transmitted using, for example, power line communications signals over a common communications medium. The common communications medium is operable for carrying signals of a plurality of networks.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: October 16, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Xiaolin Lu, Robert Liang, Mehul Soman, Kumaran Vijayasankar, Ramanuja Vedantham
  • Publication number: 20180294842
    Abstract: In accordance with disclosed embodiments, a first power line communication (PLC) device connected to a PLC network includes channel control logic that assigns a first channel of the PLC network for transmission on a power line of PLC data packets between the first PLC device and a second PLC device connected to the PLC network and assigns a second channel of the PLC network for transmission on the power line of PLC data packets between the first PLC device and the third PLC device connected to the PLC network. The PLC device includes a transceiver that receives and transmits PLC data packets on the PLC network and which operates as a bridge device that communicates on both the first and second channels to pass PLC data packets between the second PLC device and the third PLC device.
    Type: Application
    Filed: June 11, 2018
    Publication date: October 11, 2018
    Inventors: Yanjun Sun, Minghua Fu, Xiaolin Lu
  • Patent number: 10097371
    Abstract: Systems and methods for carrier sense multiple access (CSMA) protocols for power line communications (PLC) are described. In some embodiments, a method may include performing a virtual carrier sensing operation and, in response to the virtual carrier sensing operation indicating that a communication channel is idle, calculating a contention window. The method may also include performing a physical carrier sensing operation subsequent to the virtual carrier sensing operation, the physical carrier sensing operation based, at least in part, upon the contention window. In response to the physical carrier sensing operation indicating that the communication channel is idle, the method may then include transmitting data over the channel. In other embodiments, another method may include determining that a data transmission is a unicast transmission and that an acknowledgement message has not been received.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: October 9, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Shu Du, Robert W. Liang, Xiaolin Lu
  • Patent number: 10091101
    Abstract: A method and apparatus for dynamic medium switching in a hybrid network. A method for packet transmission by a combo device includes maintaining a wireless network confidence rating value that is indicative of packet transfer reliability of a wireless network accessed by the device. A wired network confidence rating value that is indicative of packet transfer reliability of a wired network accessed by the device is also maintained. One of the wireless network and the wired network to be used for initial transmission of the data packet is selected based on which of the wireless confidence rating value and the wired confidence rating value is indicative of a higher likelihood of the packet being successfully transmitted. The packet is routed to be transmitted via the selected network.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: October 2, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Ramanuja Vedantham, Jiun-Ren Lin, Xiaolin Lu
  • Publication number: 20180248860
    Abstract: A network includes a first wireless node that communicates over a wireless network connection. The first wireless node includes a first encryption engine that processes a first initialization data set and a current transmit sequence associated with a current communication to generate a next transmit sequence that is employed to communicate with a second wireless node that derives a next received sequence that corresponds to the next transmit sequence to process a subsequent communication.
    Type: Application
    Filed: September 28, 2017
    Publication date: August 30, 2018
    Inventors: ARITON E. XHAFA, XIAOLIN LU, JIANWEI ZHOU, IL HAN KIM
  • Publication number: 20180242266
    Abstract: A network includes a plurality of parent nodes to communicate in a wireless network via a wireless network protocol. A network node establishes a network connection to one of the parent nodes of the plurality of parent nodes in response to received beacons from the parent nodes. A signal analyzer in the network node processes a received signal strength of the beacons and the number of beacons received over a given time period from each of the parent nodes. The signal analyzer selects the parent node by analyzing the received signal strength for a number of beacons received from each parent node with respect to a number of expected beacons transmitted from each parent node of the plurality of parent nodes over the given time period.
    Type: Application
    Filed: September 13, 2017
    Publication date: August 23, 2018
    Inventors: ARITON E. XHAFA, JIANWEI ZHOU, IL HAN KIM, KAICHIEN TSAI, XIAOLIN LU
  • Publication number: 20180234893
    Abstract: A network includes a mobile network node (MNN) that includes a mobile node communications manager (MNCM) to facilitate wireless communications to a plurality of stationary network nodes (SNNs) in a wireless network via a wireless network protocol. The MNCM utilizes a multicast address received over the wireless network. The multicast address is assigned to a predetermined network time slot to communicate uplink data from the MNN to the SNNs. The MNN receives downlink data via a separate predetermined network address and time slot assigned to a given SNN.
    Type: Application
    Filed: September 13, 2017
    Publication date: August 16, 2018
    Inventors: ARITON XHAFA, JIANWEI ZHOU, XIAOLIN LU, IL HAN KIM, KAICHIEN TSAI
  • Publication number: 20180234526
    Abstract: In a disclosed embodiment, a method for communication in a network includes receiving, at a first device registered to the network, a physical layer (PHY) frame that includes a PHY header and a MAC header. The PHY frame may further include a MAC payload. The PHY header includes a destination address field. The method further includes comparing a network address of the first device to the destination address field to determine whether the destination address field stores a value having the same number of bits as the network address. When the comparison indicates that the value stored by the destination address field does not have the same number of bits as the network address, the method skips decoding the MAC header and the MAC payload.
    Type: Application
    Filed: February 12, 2018
    Publication date: August 16, 2018
    Inventors: Gang Xu, Ramanuja Vedantham, Kumaran Vijayasankar, Anand G Dabak, Tarkesh Pande, Il Han Kim, Xiaolin Lu
  • Patent number: 9998175
    Abstract: In accordance with disclosed embodiments, a first power line communication (PLC) device connected to a PLC network includes channel control logic that assigns a first channel of the PLC network for transmission on a power line of PLC data packets between the first PLC device and a second PLC device connected to the PLC network and assigns a second channel of the PLC network for transmission on the power line of PLC data packets between the first PLC device and the third PLC device connected to the PLC network. The PLC device includes a transceiver that receives and transmits PLC data packets on the PLC network and which operates as a bridge device that communicates on both the first and second channels to pass PLC data packets between the second PLC device and the third PLC device.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: June 12, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Yanjun Sun, Minghua Fu, Xiaolin Lu