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    Authentication of networked devices having low computational capacity
    1.
    发明授权
    Authentication of networked devices having low computational capacity 有权

    公开(公告)号：US12261835B2

    公开(公告)日：2025-03-25

    申请号：US18408969

    申请日：2024-01-10

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Kumaran Vijayasankar ,  Oliver Shih ,  Arvind K. Raghu ,  Ramanuja Vedantham ,  Xiaolin Lu

    IPC: H04L9/40 ,  H04L9/32

    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.

    ADVANCED SWITCH NODE SELECTION FOR POWER LINE COMMUNICATIONS NETWORK
    4.
    发明申请
    ADVANCED SWITCH NODE SELECTION FOR POWER LINE COMMUNICATIONS NETWORK 有权

    公开(公告)号：US20220070064A1

    公开(公告)日：2022-03-03

    申请号：US17521968

    申请日：2021-11-09

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Xiaolin Lu

    IPC: H04L12/24 ,  H04B3/54 ,  H04B3/00 ,  H04B3/46

    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.

    COEXISTENCE PRIMITIVES IN POWER LINE COMMUNICATION NETWORKS
    5.
    发明申请
    COEXISTENCE PRIMITIVES IN POWER LINE COMMUNICATION NETWORKS 审中-公开

    公开(公告)号：US20200322002A1

    公开(公告)日：2020-10-08

    申请号：US16852700

    申请日：2020-04-20

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

    IPC: H04B3/54 ,  H04L12/413

    Abstract: Systems and methods for setting a carrier-sensing mechanism in a PLC node are disclosed. In a PLC standard, coexistence is achieved by having the nodes detect a common preamble and backing off by a Coexistence InterFrame Space (cEIFS) time period to help the node to avoid interfering with the other technologies. In one embodiment, a PHY primitive is sent from the PHY to the MAC know that there has been a preamble detection. A two-level indication may be used—one indication after receiving the preamble and other indication after decoding the entire frame. The MAC sets the carrier-sensing mechanism based on the preamble detection.

    NETWORK ADDRESS ASSIGNMENT AND RECLAMATION FOR HIERARCHICAL BASED RPL NETWORKS
    7.
    发明申请
    NETWORK ADDRESS ASSIGNMENT AND RECLAMATION FOR HIERARCHICAL BASED RPL NETWORKS 审中-公开

    公开(公告)号：US20200099613A1

    公开(公告)日：2020-03-26

    申请号：US16696150

    申请日：2019-11-26

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Arvind K. Raghu ,  Ariton E. Xhafa

    IPC: H04L12/753 ,  H04L29/12 ,  H04L12/751

    Abstract: Disclosed embodiments relate to a Hierarchical Do-Dag based RPL (H-DOC) network configuration where the network address of each node corresponds to its location within the hierarchical network. Network addresses are initialized hierarchically. Candidate patent nodes signal availability. Candidate child nodes respond to a selected candidate parent node with a temporary address. The selected candidate parent node acknowledges selection and communicates a hierarchical address for the child node in a transmission to the temporary address. The child node changes its address to the hierarchical address from the parent node. When a node switches parent nodes, it signals the old parent node to deallocate it as a child node, and then signals a selected candidate parent node with a temporary address.

    Flow control for powerline communications
    8.
    发明授权
    Flow control for powerline communications 有权

    公开(公告)号：US10116575B2

    公开(公告)日：2018-10-30

    申请号：US14540111

    申请日：2014-11-13

    Applicant: Texas Instruments Incorporated

    Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Anand G. Dabak ,  Tarkesh Pande ,  Il Han Kim

    IPC: H04L12/825 ,  H04L12/801 ,  H04B3/54 ,  H04L12/835 ,  H04L12/823

    Abstract: A method of powerline communications in a powerline communications (PLC) network including a first PLC device and at least a second PLC device. The first PLC device transmits a data frame to the second node over a PLC channel. The second PLC device has a data buffer for storing received information. The second PLC device runs a flow control algorithm which determines a current congestion condition or a projected congestion condition of the data buffer based on at least one congestion parameter. The current congestion condition and projected congestion condition include nearly congested and fully congested. When the current or projected congestion condition is either nearly congested or fully congested, the second PLC device transmits a BUSY including frame over the PLC channel to at least the first PLC device. The first PLC device defers transmitting of any frames to the second PLC device for a congestion clearing wait time.

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