公开(公告)号：US11116020B2

公开(公告)日：2021-09-07

申请号：US16897107

申请日：2020-06-09

Applicant: Texas Instruments Incorporated

Inventor： Leonardo William Estevez ,  Ariton Xhafa ,  Ramanuja Vedantham ,  Yanjun Sun

IPC: H04W76/12 ,  H04W76/14 ,  H04W88/08 ,  H04W84/12

Abstract: An emulated wireless access point (AP) at a first PMC device (PMC1) establishes a first tunneled direct link setup (TDLS) session between a first station module (STA1) incorporated into the PMC1 and a second station module (STA2) incorporated into a second PMC device (PMC2). Following establishment of the TDLS session, the wireless AP is allowed to sleep; and most infrastructure management duties are handled by the STA1 during the session. PMC device battery charge may be conserved as a result. The emulated wireless AP may also establish a second TDLS link to a third station module (STA3) incorporated into a third PMC device (PMC3). The STA1 may then bridge data traffic flow between the STA2 and the STA3. Such bridging operation may enable communication between two PMC devices otherwise unable to decode data received from the other.

公开(公告)号：US11096208B2

公开(公告)日：2021-08-17

申请号：US16175490

申请日：2018-10-30

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.

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.

公开(公告)号：US10687309B2

公开(公告)日：2020-06-16

申请号：US15009279

申请日：2016-01-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham

IPC: H04W72/00 ,  H04W84/18

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.

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.

公开(公告)号：US20190069315A1

公开(公告)日：2019-02-28

申请号：US16175490

申请日：2018-10-30

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.

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.

公开(公告)号：US20180255457A1

公开(公告)日：2018-09-06

申请号：US15449858

申请日：2017-03-03

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Alejandro Martin Lampropulos ,  Arvind Kandhalu Raghu

IPC: H04W12/06 ,  H04L9/32 ,  H04L29/06 ,  H04W12/04 ,  H04L9/14

CPC classification number: H04W12/06 ,  H04L9/3247 ,  H04L9/3271 ,  H04L63/0428 ,  H04L63/06 ,  H04L63/083 ,  H04L2209/80 ,  H04W4/70 ,  H04W4/80 ,  H04W12/02 ,  H04W12/04 ,  H04W84/20 ,  H04W88/16

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.

公开(公告)号：US09820294B2

公开(公告)日：2017-11-14

申请号：US14813175

申请日：2015-07-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ariton E. Xhafa ,  Yanjun Sun ,  Ramanuja Vedantham

IPC: H04W4/00 ,  H04W72/12 ,  H04W16/14 ,  H04W88/06 ,  H04W84/12

CPC classification number: H04W72/1215 ,  H04W4/80 ,  H04W16/14 ,  H04W84/12 ,  H04W88/06

Abstract: Embodiments provide a communication device. A device comprises at least two dissimilar network technology subsystems, at least one subsystem of which is lower priority than at least another of the dissimilar subsystems. In some embodiments, a device is able to transmit a silencing frame during a transmission window within a lower priority technology network interval. A transceiver is able to calculate a transmission window to end by at least a duration of time to complete transmission of the silencing frame prior to the beginning of next immediate string of at least one higher priority network technology subsystem interval, and transmit a silencing frame during a lower priority technology network interval during the transmission window.

公开(公告)号：US20170317713A1

公开(公告)日：2017-11-02

申请号：US15424692

申请日：2017-02-03

Applicant: Texas Instruments Incorporated

Inventor： Kaichien Tsai ,  Arvind Kandhalu Raghu ,  Ramanuja Vedantham

IPC: H04B1/713 ,  H04B17/318 ,  H04L12/26 ,  H04L1/00 ,  H04W4/00 ,  H04L12/933

CPC classification number: H04B1/713 ,  H04B17/26 ,  H04B17/318 ,  H04B2001/7154 ,  H04L1/0002 ,  H04L1/0061 ,  H04L1/203 ,  H04L43/0847 ,  H04L43/16 ,  H04L49/1584 ,  H04Q2213/13215 ,  H04W4/80 ,  H04W40/22 ,  H04W84/18

Abstract: A method for pseudo channel hopping in a node of a wireless mesh network is provided that includes scanning each channel of a plurality of channels used for packet transmission by the node, wherein each channel is scanned for a scan dwell time associated with the channel, updating statistics for each channel based on packets received by the node during the scanning of the channel, and changing scan dwell times of the plurality of channels periodically based on the statistics.