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公开(公告)号：US20230032116A1
公开(公告)日：2023-02-02
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
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：US11470077B2
公开(公告)日：2022-10-11
申请号：US17159016
申请日：2021-01-26
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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公开(公告)号：US20200274771A1
公开(公告)日：2020-08-27
申请号：US16812670
申请日：2020-03-09
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：US10681610B2
公开(公告)日：2020-06-09
申请号：US15591867
申请日：2017-05-10
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Ariton E. Xhafa , Jianwei Zhou , Xiaolin Lu
IPC: H04W40/24 , H04L12/751 , H04W84/18 , H04B1/7156 , H04W84/20
Abstract: A network includes at least one node to communicate with at least one other node via a wireless network protocol. The node includes a network configuration module to periodically switch a current node function of the node between an intermediate node function and a leaf node function. The switch of the current node function enables automatic reconfiguration of the wireless network based on detected communications between the at least one node and at least one intermediate node or at least one leaf node via the wireless network protocol.
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公开(公告)号：US20200176992A1
公开(公告)日：2020-06-04
申请号：US16782290
申请日：2020-02-05
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Il Han Kim , Xiaolin Lu
Abstract: A photovoltaic system with an inverter, at least one solar panel for providing electrical power, and electrical wiring for coupling electrical power from the at least one solar panel to the inverter. Also included is a transmitter for transmitting a messaging protocol along the electrical wiring, where the protocol includes a multibit wireline signal. Also included is circuitry for selectively connecting the electrical power from the at least one solar panel along the electrical wiring to the inverter in response to the messaging protocol.
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Patent Agency Ranking
公开(公告)号：US10560909B2
公开(公告)日：2020-02-11
申请号：US15703700
申请日：2017-09-13
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Ariton E. Xhafa , Jianwei Zhou , Il Han Kim , Kaichien Tsai , Xiaolin Lu
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.
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公开(公告)号：US20190132244A1
公开(公告)日：2019-05-02
申请号：US16148175
申请日：2018-10-01
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Ramanuja Vedantham , Jiun-Ren Lin , Xiaolin Lu
IPC: H04L12/721 , H04W40/12
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.
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公开(公告)号：US10270492B2
公开(公告)日：2019-04-23
申请号：US16004928
申请日：2018-06-11
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Yanjun Sun , Minghua Fu , Xiaolin Lu
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.
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公开(公告)号：US20190052716A1
公开(公告)日：2019-02-14
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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公开(公告)号：US09871630B2
公开(公告)日：2018-01-16
申请号：US14557858
申请日：2014-12-02
Applicant: Texas Instruments Incorporated
Inventor： Kumaran Vijayasankar , Ramanuja Vedantham , Anand G. Dabak , Badri N. Varadarajan , Il Han Kim , Xiaolin Lu
CPC classification number: H04L5/0048 , H04B3/54 , H04B3/542 , H04B2203/5408 , H04B2203/5466 , H04B2203/5483 , H04B2203/5491 , H04L5/0044 , H04L5/0055 , H04L5/0078 , H04L5/0094 , H04L25/0272
Abstract: Systems and methods for designing, using, and/or implementing hybrid communication networks are described. In various embodiments, these systems and methods may be applicable to power line communications (PLC). For example, one or more of the techniques disclosed herein may include methods to coordinate medium-to-low voltage (MV-LV) and low-to-low voltage (LV-LV) PLC networks when the MV-LV network operates in a frequency subband mode and the LV-LV network operates in wideband mode (i.e., hybrid communications). In some cases, MV routers and LV routers may have different profiles. For instance, MV-LV communications may be performed using MAC superframe structures, and first-level LV to lower-level LV communications may take place using a beacon mode. Lower layer LV nodes may communicate using non-beacon modes. Also, initial scanning procedures may encourage first-to-second-level LV device communications rather than MV-to-first-level LV connections.
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