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1. 发明申请

US20220070064A1 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
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Ramanuja Vedantham , Kumaran Vijayasankar , Xiaolin Lu
IPC分类号： H04L12/24 , H04B3/54 , H04B3/00 , H04B3/46
摘要： 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.

2. 发明申请

US20200322002A1 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
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Kumaran Vijayasankar , Ramanuja Vedantham , Tarkesh Pande
IPC分类号： H04B3/54 , H04L12/413
摘要： 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.

3. 发明授权

US10687309B2 Enhanced broadcast transmission in unslotted channel hopping medium access control 有权
公开(公告)号：US10687309B2
公开(公告)日：2020-06-16
申请号：US15009279
申请日：2016-01-28
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Kumaran Vijayasankar , Ramanuja Vedantham
IPC分类号： H04W72/00 , H04W84/18
摘要： 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.

4. 发明申请

US20200099613A1 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
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Ramanuja Vedantham , Kumaran Vijayasankar , Arvind K. Raghu , Ariton E. Xhafa
IPC分类号： H04L12/753 , H04L29/12 , H04L12/751
摘要： 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.

5. 发明授权

US10116575B2 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
申请人： Texas Instruments Incorporated
发明人： Kumaran Vijayasankar , Ramanuja Vedantham , Anand G. Dabak , Tarkesh Pande , Il Han Kim
IPC分类号： H04L12/825 , H04L12/801 , H04B3/54 , H04L12/835 , H04L12/823
摘要： 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.

6. 发明授权

US10064218B2 Channel hopping aware channel access and re-transmission 有权
公开(公告)号：US10064218B2
公开(公告)日：2018-08-28
申请号：US15450644
申请日：2017-03-06
申请人： Texas Instruments Incorporated
发明人： Kumaran Vijayasankar , Jyothsna Kunduru
IPC分类号： H04L12/413 , H04W74/08 , H04W4/80 , H04B1/713 , H04L5/00
CPC分类号： H04W74/0808 , H04B1/713 , H04B2001/7154 , H04L5/0012 , H04L5/0055 , H04W4/80 , H04W74/085
摘要： A method of channel access for a radio device in an asynchronous channel hopping wireless network. A backoff time is set from an Interference Avoidance Delay plus a random backoff time for transmissions from the radio device. For initial frame transmissions, an initial value for a number of backoffs (nb) and initial number of preamble detection backoffs (npdb) is set. After waiting for expiring of the initial backoff time and provided a current npdb_value

7. 发明申请

US20170317987A1 Enhanced Network Security Using Packet Fragments 审中-公开
公开(公告)号：US20170317987A1
公开(公告)日：2017-11-02
申请号：US15143460
申请日：2016-04-29
申请人： Texas Instruments Incorporated
发明人： Kumaran Vijayasankar , Mehul Soman , Arvind Kandhalu Raghu , Il Han Kim
IPC分类号： H04L29/06 , H04L12/24 , H04L29/08
CPC分类号： H04L63/0428 , H04L63/0435 , H04L63/061 , H04L67/141 , H04W4/70 , H04W12/02 , H04W12/04 , H04W12/06
摘要： A network system comprising a first network element and a second network element. The first network element is programmed to provide the step of first, communicating to the second network element a plurality of configuration parameter sets. Each configuration parameter set corresponds to a respective frame fragment and comprises a parameter value that differs in value from the parameter value in another configuration parameter set in the plurality of configuration parameter sets. The first network element also is programmed to provide the step of second, communicating a frame, to the second network element, in a plurality of frame fragments, wherein each frame fragment in the plurality of frame fragments is communicated according to a respective parameter value in the plurality of configuration parameter sets.

8. 发明授权

US09602394B2 Routing frame propagation in power line networks 有权
公开(公告)号：US09602394B2
公开(公告)日：2017-03-21
申请号：US14663415
申请日：2015-03-19
申请人： Texas Instruments Incorporated
发明人： Kumaran Vijayasankar , Muhammad Owais Khan
IPC分类号： H04W4/00 , H04L12/721 , H04B3/54 , H04L12/707
CPC分类号： H04L45/26 , H04B3/542 , H04L45/124 , H04L45/22
摘要： Determination of a transmission through a network having a plurality of nodes using carrier sense multiple access collision avoidance (CSMA/CA) may be performed by broadcasting a route request (RREQ) packet from a source node that is targeted towards a destination node within the network, such that the RREQ is received by a first set of nodes in proximity to the source node. After first receiving a RREQ, each of the plurality of nodes rebroadcasts the RREQ after waiting a randomized amount of wait time. During each randomized wait time, the node suppresses all but one RREQ received by the node during the wait time.

9. 发明申请

US20170063572A1 Efficient Fairness Allocation in Powerline CSMA/CA Protocols 审中-公开
标题翻译：电力线CSMA / CA协议中的高效公平分配
公开(公告)号：US20170063572A1
公开(公告)日：2017-03-02
申请号：US15353223
申请日：2016-11-16
申请人： Texas Instruments Incorporated
发明人： Ramanuja Vedantham , Kumaran Vijayasankar
IPC分类号： H04L12/413 , H04L1/00 , H04L5/00 , H04B3/54
CPC分类号： H04L12/413 , H04B3/54 , H04B2203/5408 , H04B2203/5425 , H04L1/0002 , H04L5/0007 , H04W74/0816
摘要： Transmission over a communication channel using carrier sense multiple access collision avoidance (CSMA/CA) may be performed by determining for each frame if the communication channel is busy after a backoff time proportional to a randomly generated number within a contention window (CW). When the channel is not busy, a frame of data may be transmitted. When the channel is busy, the device may periodically determine if the communication channel is busy after subsequent backoff times. The value of CW is adjusted for each subsequent backoff time using a fairness protocol, in which the value of CW is increased until the value of CW reaches a maximum CW value; and then the value of CW is held until a fairness number of backoff repetitions reaches a fairness threshold; then the value of CW is reduced incrementally until the value of CW reaches a minimum CW value.
摘要翻译：如果通信信道在竞争窗口（CW）中与随机生成的数字成比例的退避时间之后通信信道为忙，则可以通过确定每个帧来执行使用载波侦听多址冲突避免（CSMA / CA）的通信信道上的传输。当信道不忙时，可以发送一帧数据。当信道繁忙时，设备可以在后续的退避时间周期性地确定通信信道是否正在占线。使用公平协议对每个后续退避时间调整CW的值，其中CW的值增加，直到CW的值达到最大CW值; 然后持续CW的值，直到公平的退避次数达到公平阈值; 那么CW的值逐渐减小，直到CW的值达到最小CW值。

10. 发明申请

US20160330213A1 Power Line Communication (PLC) Network Nodes Using Cipher Then Segment Security 审中-公开
公开(公告)号：US20160330213A1
公开(公告)日：2016-11-10
申请号：US15216291
申请日：2016-07-21
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Kumaran Vijayasankar , Ramanuja Vedantham , Tarkesh Pande
IPC分类号： H04L29/06
CPC分类号： H04L63/123 , G06F15/177 , H04B3/54 , H04B3/542 , H04B2203/5408 , H04L9/0819 , H04L9/30 , H04L9/3242 , H04L63/0428 , H04L63/061 , H04L63/0876 , H04L2209/24
摘要： Embodiments of the invention provide systems and methods for a cipher then segment approach in a Power Line Communication (PLC). A node or device generates frames to be transmitted to a destination node in the PLC network. A processor in the node is configured to generate a data payload comprising data to be sent to the destination node. The processor divides the data payload into two or more payload segments and encrypts the payload segments. The processor creates a frame for each of the encrypted payload segments, wherein each frame comprises a message integrity code. The processor creates a segment identifier for each frame using the message integrity code and an authentication key that is shared with the destination PLC node. The segment identifier is added to each frame.

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