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公开(公告)号：US20230421452A1
公开(公告)日：2023-12-28
申请号：US18465219
申请日：2023-09-12
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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122.发明公开公开(公告)号：US20230370985A1
公开(公告)日：2023-11-16
申请号：US18195254
申请日：2023-05-09
Applicant: Texas Instruments Incorporated
Inventor： Seth Ryan Rickard , Kumaran Vijayasankar , Suyash Jain , Alexander Anthony D′Abreu
CPC classification number: H04W56/0015 , H04W24/10
Abstract: An example apparatus includes interface circuitry, memory configured to store machine-readable instructions, and processing circuitry configured to at least one of instantiate or execute the machine-readable instructions. The example processing circuitry is configured to at least one of instantiate or execute the machine-readable instructions to determine a connectivity metric for a first device synchronized with a second device and cause, via the interface circuitry, transmission of the connectivity metric to a third device with which the first device is not synchronized. Additionally, the example processing circuitry is configured to at least one of instantiate or execute the machine-readable instructions to, based on a first communication from the third device, cause transmission of a second communication to the first device to cause the first device to synchronize with the third device.
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公开(公告)号：US11696364B2
公开(公告)日：2023-07-04
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
CPC classification number: 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：US20230085257A1
公开(公告)日：2023-03-16
申请号：US18053403
申请日：2022-11-08
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.
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公开(公告)号：US11589333B2
公开(公告)日：2023-02-21
申请号：US17508787
申请日：2021-10-22
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Kumaran Vijayasankar , Ramanuja Vedantham
Abstract: A method of operating a mesh network is disclosed. The method includes joining a network as a child of a parent node and receiving a downlink broadcast channel from the parent node. The method further includes setting the downlink broadcast channel as an uplink broadcast channel in response to the step of receiving.
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Patent Agency Ranking
公开(公告)号：US20220321171A1
公开(公告)日：2022-10-06
申请号：US17844118
申请日：2022-06-20
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Kumaran Vijayasankar , Ramanuja Vedantham , Badri N. Varadarajan , Anand G. Dabak
Abstract: Systems and methods for designing, using, and/or implementing beacon-enabled communications for variable payload transfers are described. In various embodiments, these systems and methods may be applicable to power line communications (PLC). For example, a method may include implementing a superframe having a plurality of beacon slots, a plurality of intermediate slots following the beacon slots, and a poll-based Contention Free Period (CFP) slot following the intermediate slots. Each of the beacon slots and each of the intermediate slots may correspond to a respective one of a plurality of frequency subbands, and the poll-based CFP slot may correspond to a combination of the plurality of frequency subbands. The method may also include receiving a poll request over a first of the plurality of frequency subbands during the poll-based CFP slot, and then transmitting a data packet over a second of the plurality of frequency subbands during the poll-based CFP slot.
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127.发明授权公开(公告)号：US10396852B2
公开(公告)日：2019-08-27
申请号：US15946041
申请日：2018-04-05
Applicant: Texas Instruments Incorporated
Inventor： Kumaran Vijayasankar , Ramanuja Vedantham , Tarkesh Pande
IPC: H04B3/54
Abstract: Embodiments of methods and systems for supporting coexistence of multiple technologies in a Power Line Communication (PLC) network are disclosed. A long coexistence preamble sequence may be transmitted by a device that has been forced to back off the PLC channel multiple times. The long coexistence sequence provides a way for the device to request channel access from devices on the channel using other technology. The device may transmit a data packet after transmitting the long coexistence preamble sequence. A network duty cycle time may also be defined as a maximum allowed duration for nodes of the same network to access the channel. When the network duty cycle time occurs, all nodes will back off the channel for a duty cycle extended inter frame space before transmitting again. The long coexistence preamble sequence and the network duty cycle time may be used together.
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公开(公告)号：US20190245844A1
公开(公告)日：2019-08-08
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
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：US10334087B2
公开(公告)日：2019-06-25
申请号：US15894250
申请日：2018-02-12
Applicant: Texas Instruments Incorporated
Inventor： Gang Xu , Ramanuja Vedantham , Kumaran Vijayasankar , Anand G Dabak , Tarkesh Pande , Il Han Kim , Xiaolin Lu
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.
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公开(公告)号：US10187376B2
公开(公告)日：2019-01-22
申请号：US15222524
申请日：2016-07-28
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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