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公开(公告)号：US11909730B2
公开(公告)日：2024-02-20
申请号：US17963411
申请日：2022-10-11
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Kumaran Vijayasankar , Oliver Shih , Arvind K. Raghu , Ramanuja Vedantham , Xiaolin Lu
CPC classification number: H04L63/0823 , H04L9/3268 , H04L63/0428 , H04L63/0435 , H04L63/0442 , H04L63/062 , H04L63/0884
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.
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公开(公告)号：US11601904B2
公开(公告)日：2023-03-07
申请号：US17353872
申请日：2021-06-22
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Ariton E. Xhafa , Jianwei Zhou , Xiaolin Lu
Abstract: A network includes an intermediate node to communicate with a child node via a wireless network protocol. An intermediate node synchronizer in the intermediate node facilitates time synchronization with its parent node and with the child node. A child node synchronizer in the child node to facilitates time synchronization with the intermediate node. The intermediate node synchronizer exchanges synchronization data with the child node synchronizer to enable the child node to be time synchronized to the intermediate node before the intermediate node is synchronized to its parent node if the intermediate node has not synchronized to its parent node within a predetermined guard time period established for the child node.
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公开(公告)号：US20210274593A1
公开(公告)日：2021-09-02
申请号：US17322987
申请日：2021-05-18
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Xiaolin Lu , Robert Liang , Mehul Soman , Kumaran Vijayasankar , Ramanuja Vedantham
IPC: H04W80/02
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.
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公开(公告)号：US11076370B2
公开(公告)日：2021-07-27
申请号：US15591698
申请日：2017-05-10
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Ariton E. Xhafa , Jianwei Zhou , Xiaolin Lu
Abstract: A network includes an intermediate node to communicate with a child node via a wireless network protocol. An intermediate node synchronizer in the intermediate node facilitates time synchronization with its parent node and with the child node. A child node synchronizer in the child node to facilitates time synchronization with the intermediate node. The intermediate node synchronizer exchanges synchronization data with the child node synchronizer to enable the child node to be time synchronized to the intermediate node before the intermediate node is synchronized to its parent node if the intermediate node has not synchronized to its parent node within a predetermined guard time period established for the child node.
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公开(公告)号：US11013060B2
公开(公告)日：2021-05-18
申请号：US16159265
申请日：2018-10-12
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Xiaolin Lu , Robert Liang , Mehul Soman , Kumaran Vijayasankar , Ramanuja Vedantham
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.
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Patent Agency Ranking
公开(公告)号：US10938803B2
公开(公告)日：2021-03-02
申请号：US16252262
申请日：2019-01-18
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Kumaran Vijayasankar , Oliver Shih , Arvind K. Raghu , Ramanuja Vedantham , Xiaolin Lu
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.
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87.发明授权公开(公告)号：US10812135B2
公开(公告)日：2020-10-20
申请号：US15718745
申请日：2017-09-28
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Ariton E. Xhafa , Xiaolin Lu , Jianwei Zhou , Il Han Kim
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.
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公开(公告)号：US20200220574A1
公开(公告)日：2020-07-09
申请号：US16823927
申请日：2020-03-19
Applicant: Texas Instruments Incorporated
Inventor： Yanjun Sun , Gang Xu , Soon-Hyeok Choi , Bhadra Sandeep , Xiaolin Lu , Ariton E. Xhafa , Minghua Fu , Robert W. Liang , Susan Yim
Abstract: An electronic communication device comprises a first transceiver capable of a bi-directional communication session on a first communication medium; a second transceiver capable of a bi-directional communication session on a second communication medium; and a control logic coupled to the first transceiver and the second transceiver and capable of implementing a convergence layer, wherein the control logic is configured to receive, from the first transceiver, a first signal; and cause, in response to the first signal, data received and transmitted by the first transceiver on the first communication medium as part of a communication session to be received and transmitted instead by the second transceiver on the second communication medium.
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公开(公告)号：US10587476B2
公开(公告)日：2020-03-10
申请号：US15050163
申请日：2016-02-22
Applicant: Texas Instruments Incorporated
Inventor： Ramanuja Vedantham , Kumaran Vijayasankar , Xiaolin Lu
Abstract: An algorithm for the promotion of terminal nodes to switch nodes in a PLC network reduces overall network overhead and collisions, while ensuring the appropriate selection of a switch node and minimizing the number of levels in a PLC network. It also ensures that the terminal nodes with appropriate signal-to-noise ratios (SNRs) are promoted. It is desirable to have a network with fewer levels. The disclosed approach favors the nodes that are closer to the DC to promote them as switch nodes. This is achieved by waiting for a smaller number of PNPDUs for a node that is closer to the DC in comparison to a node that is farther away from the DC.
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公开(公告)号：US20190044751A1
公开(公告)日：2019-02-07
申请号：US16154626
申请日：2018-10-08
Applicant: Texas Instruments Incorporated
Inventor： Shu Du , Robert W. Liang , Xiaolin Lu
IPC: H04L12/413 , H04L5/00 , H04B3/54
CPC classification number: H04L12/413 , H04B3/544 , H04L5/0096
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. The method may further include incrementing a backoff parameter and repeating one or more carrier sense operations.
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