Patents by Inventor Ramanuja Vedantham

Ramanuja Vedantham has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10396852
    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.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: August 27, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATION
    Inventors: Kumaran Vijayasankar, Ramanuja Vedantham, Tarkesh Pande
  • Publication number: 20190245844
    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.
    Type: Application
    Filed: January 18, 2019
    Publication date: August 8, 2019
    Inventors: Kumaran Vijayasankar, Oliver Shih, Arvind K. Raghu, Ramanuja Vedantham, Xiaolin Lu
  • Patent number: 10334087
    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.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: June 25, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Gang Xu, Ramanuja Vedantham, Kumaran Vijayasankar, Anand G Dabak, Tarkesh Pande, Il Han Kim, Xiaolin Lu
  • Patent number: 10291520
    Abstract: A BLE-Mesh device includes a controller, an RF driver for driving the transceiver adapted to be coupled to an antenna, and a counter. The controller implements an applications layer including BLE and Mesh Applications, and a BLE stack and a mesh stack. A redundant traffic suppression relaying algorithm is for waiting for a random time within a selected time window from W1 to a later W2 before attempting to transmit a first packet that contains a unique source (SRC) address and a packet sequence (SEQ) number of a device that is the source of the first packet. If during the random time a packet with both the source device's SRC address and the SEQ number is received, the counter is incremented from an initial count to a current count. After the random time elapses, the current count is compared to a Cthreshold value, and the first packet is transmitted only if the current count<the Cthreshold value.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: May 14, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Arvind Kandhalu Raghu, Kaichien Tsai, Ramanuja Vedantham
  • Publication number: 20190132244
    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.
    Type: Application
    Filed: October 1, 2018
    Publication date: May 2, 2019
    Inventors: Ramanuja Vedantham, Jiun-Ren Lin, Xiaolin Lu
  • Publication number: 20190069315
    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.
    Type: Application
    Filed: October 30, 2018
    Publication date: February 28, 2019
    Inventors: Arvind K. Raghu, Ariton E. Xhafa, Ramanuja Vedantham, Xiaolin Lu
  • Publication number: 20190053259
    Abstract: A method for concurrent execution of multiple protocols using a single radio of a wireless communication device is provided that includes receiving, in a radio command scheduler, a first radio command from a first protocol stack of a plurality of protocol states executing on the wireless communication device, determining a scheduling policy for the first radio command based on a current state of each protocol stack of the plurality of protocol stacks, and scheduling the first radio command in a radio command queue for the radio based on the scheduling policy, wherein the radio command scheduler uses the radio command queue to schedule radio commands received from the plurality of protocol stacks.
    Type: Application
    Filed: August 10, 2018
    Publication date: February 14, 2019
    Inventors: Arvind Kandhalu Raghu, Antony James Cave, Ramanuja Vedantham, Xiaoxi Bruce Zhang
  • Publication number: 20190052716
    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.
    Type: Application
    Filed: October 12, 2018
    Publication date: February 14, 2019
    Inventors: Xiaolin Lu, Robert Liang, Mehul Soman, Kumaran Vijayasankar, Ramanuja Vedantham
  • Patent number: 10187376
    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.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: January 22, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Kumaran Vijayasankar, Oliver Shih, Arvind K. Raghu, Ramanuja Vedantham, Xiaolin Lu
  • Patent number: 10135492
    Abstract: In a method for communicating with a plurality of devices using different communication protocols, a signal is received at a transceiver device from a neighbor device via a physical layer of a communication media. At a first time the signal contains a header frame from a first device conforming to a first communication protocol and at another time the signal contains a header frame from a second device conforming to a second communication protocol. The transceiver determines which of the different communication protocols is being used by each of the plurality of devices. The transceiver may then process inbound payload data using the indentified protocol type. Data frames are transmitted to the first device using the first communication protocol and data frames are transmitted to the second device using the second communication protocol.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: November 20, 2018
    Assignee: Texas Instruments Incorporated
    Inventors: Kumaran Vijayasankar, Ramanuja Vedantham, Anuj Batra, Tarkesh Pande, Il Han Kim
  • Patent number: 10117267
    Abstract: A network includes a parent node and at least one child node that is 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.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: October 30, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Arvind K. Raghu, Ariton E. Xhafa, Ramanuja Vedantham, Xiaolin Lu
  • Patent number: 10116575
    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.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: October 30, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Kumaran Vijayasankar, Ramanuja Vedantham, Anand G. Dabak, Tarkesh Pande, Il Han Kim
  • Patent number: 10104192
    Abstract: A communication system and method includes receiving payload data of first and second media access control (MAC) frames. A MAC-level protocol is identified in response to the indication of the selected network for each of the first and second MAC frames. The payload data of the first and second MAC frames is transmitted and/or received across respective networks transmitted using, for example, power line communications signals over a common communications medium. The common communications medium is operable for carrying signals of a plurality of networks.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: October 16, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Xiaolin Lu, Robert Liang, Mehul Soman, Kumaran Vijayasankar, Ramanuja Vedantham
  • Publication number: 20180294840
    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.
    Type: Application
    Filed: April 5, 2018
    Publication date: October 11, 2018
    Inventors: Kumaran VIJAYASANKAR, Ramanuja VEDANTHAM, Tarkesh PANDE
  • Patent number: 10091101
    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.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: October 2, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Ramanuja Vedantham, Jiun-Ren Lin, Xiaolin Lu
  • Publication number: 20180255457
    Abstract: A method for network authentication of wireless devices at a gateway is provided that includes scanning a wireless network by the gateway to discover unjoined wireless devices, joining a discovered wireless device to the gateway using a non-internet protocol implemented by the wireless device, wherein the joining results in an encrypted connection between the gateway and the wireless device, and authenticating the discovered wireless device to the gateway via the encrypted connection, wherein authentication is performed according to an authentication protocol of a network protocol management layer of the gateway.
    Type: Application
    Filed: March 3, 2017
    Publication date: September 6, 2018
    Inventors: Ramanuja Vedantham, Alejandro Martin Lampropulos, Arvind Kandhalu Raghu
  • Publication number: 20180241432
    Abstract: Systems and methods for efficiently allocating beacon slot among multiple nodes on multiple levels within a power line communication network are described. In various implementations, these systems and methods may be applicable to Power Line Communications (PLC). For example, a method may include performing, by a communications device, assigning beacon transmission times to nodes within the communication device's network. The assigned beacon transmission times comprise a beacon slot and frame pattern. The beacon slot and frame pattern ensure that each node does not transmit a beacon in a beacon slot that is adjacent to a beacon slot assigned to a parent or child node. A beacon transmission slot is reserved for a base node in every frame. The frames may be organized into thirty-two-frame superframes, wherein each frame comprises a base node beacon slot and four switch node beacon slots.
    Type: Application
    Filed: February 19, 2018
    Publication date: August 23, 2018
    Inventors: Ramanuja VEDANTHAM, Kumaran VIJAYASANKAR, Ramachandran ANANTHAKRISHNAN, Susan YIM
  • Publication number: 20180234526
    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.
    Type: Application
    Filed: February 12, 2018
    Publication date: August 16, 2018
    Inventors: Gang Xu, Ramanuja Vedantham, Kumaran Vijayasankar, Anand G Dabak, Tarkesh Pande, Il Han Kim, Xiaolin Lu
  • Patent number: 9941929
    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.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: April 10, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Kumaran Vijayasankar, Ramanuja Vedantham, Tarkesh Pande
  • Patent number: 9894512
    Abstract: A BLE-Mesh device includes a controller coupled to a memory and to a transceiver adapted to be coupled to an antenna, wherein the controller implements an applications layer including BLE and Mesh applications, and a BLE stack and a mesh stack. The BLE-Mesh device has a switchable high-speed and low-speed mode and a speed switching algorithm for implementing a method of communications in BLE-mesh network. A broadcast ping is sent to neighborhood devices with a time to live (TTL)=1. A manufacturer's ID is analyzed to identify in a manufacturer's ID field in pongs received to determine a higher-speed capable device or a lower-speed device. A higher-speed data rate is utilized for mesh communications if a percentage of higher-speed capable devices is?a threshold percentage or a lower-speed data rate is utilized for the mesh communications if the percentage of higher-speed capable devices is<the threshold percentage.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: February 13, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Arvind Kandhalu Raghu, Kaichien Tsai, Ramanuja Vedantham