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    Coexistence primitives in power line communication networks
    1.
    发明授权
    Coexistence primitives in power line communication networks 有权

    公开(公告)号：US12301302B2

    公开(公告)日：2025-05-13

    申请号：US18493129

    申请日：2023-10-24

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

    IPC: H04L12/413 ,  H04B3/54

    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.

    Authentication of networked devices having low computational capacity
    2.
    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
    8.
    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.

    SCHEDULER FOR POWER-EFFICIENT TIME SLOTTED PROTOCOL
    9.
    发明申请
    SCHEDULER FOR POWER-EFFICIENT TIME SLOTTED PROTOCOL 有权

    公开(公告)号：US20210378002A1

    公开(公告)日：2021-12-02

    申请号：US17402688

    申请日：2021-08-16

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Arvind K. Raghu ,  Ariton E. Xhafa ,  Ramanuja Vedantham ,  Xiaolin Lu

    IPC: H04W72/12

    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.

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