公开(公告)号：US10574295B2

公开(公告)日：2020-02-25

申请号：US15898923

申请日：2018-02-19

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Ramachandran Ananthakrishnan ,  Susan Yim

IPC: H04B3/54

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.

公开(公告)号：US20190052716A1

公开(公告)日：2019-02-14

申请号：US16159265

申请日：2018-10-12

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Xiaolin Lu ,  Robert Liang ,  Mehul Soman ,  Kumaran Vijayasankar ,  Ramanuja Vedantham

IPC: H04L29/08 ,  H04W80/02 ,  H04W4/20

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.

公开(公告)号：US10135492B2

公开(公告)日：2018-11-20

申请号：US14072765

申请日：2013-11-05

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Anuj Batra ,  Tarkesh Pande ,  Il Han Kim

IPC: H04B3/54 ,  H04L12/64

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.

公开(公告)号：US09941929B2

公开(公告)日：2018-04-10

申请号：US14824506

申请日：2015-08-12

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04B3/54

CPC classification number: H04B3/54 ,  H04B2203/5408 ,  H04B2203/5416 ,  H04B2203/5433 ,  H04B2203/5445

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.

公开(公告)号：US09871630B2

公开(公告)日：2018-01-16

申请号：US14557858

申请日：2014-12-02

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Anand G. Dabak ,  Badri N. Varadarajan ,  Il Han Kim ,  Xiaolin Lu

IPC: H04W72/04 ,  H04L5/00 ,  H04B3/54 ,  H04L25/02

CPC classification number: H04L5/0048 ,  H04B3/54 ,  H04B3/542 ,  H04B2203/5408 ,  H04B2203/5466 ,  H04B2203/5483 ,  H04B2203/5491 ,  H04L5/0044 ,  H04L5/0055 ,  H04L5/0078 ,  H04L5/0094 ,  H04L25/0272

Abstract: Systems and methods for designing, using, and/or implementing hybrid communication networks are described. In various embodiments, these systems and methods may be applicable to power line communications (PLC). For example, one or more of the techniques disclosed herein may include methods to coordinate medium-to-low voltage (MV-LV) and low-to-low voltage (LV-LV) PLC networks when the MV-LV network operates in a frequency subband mode and the LV-LV network operates in wideband mode (i.e., hybrid communications). In some cases, MV routers and LV routers may have different profiles. For instance, MV-LV communications may be performed using MAC superframe structures, and first-level LV to lower-level LV communications may take place using a beacon mode. Lower layer LV nodes may communicate using non-beacon modes. Also, initial scanning procedures may encourage first-to-second-level LV device communications rather than MV-to-first-level LV connections.

公开(公告)号：US09774421B2

公开(公告)日：2017-09-26

申请号：US14925030

申请日：2015-10-28

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Tarkesh Pande ,  Ramanuja Vedantham

IPC: H04L1/00 ,  H04L12/801 ,  H04L1/08 ,  H03M13/09 ,  H04B3/54 ,  G06F11/10 ,  H03M13/15 ,  H04L1/16

CPC classification number: H04L1/005 ,  G06F11/1004 ,  H03M13/09 ,  H03M13/1515 ,  H04B3/542 ,  H04B3/544 ,  H04B2203/5408 ,  H04L1/0057 ,  H04L1/0061 ,  H04L1/0071 ,  H04L1/08 ,  H04L1/1607 ,  H04L47/10

Abstract: Embodiments of methods and systems are presented for handling PHY frames with multiple Reed-Solomon encoded blocks in PLC networks. A PHY frame is receive from a PLC device, the PHY frame comprising two or more Reed-Solomon encoded blocks. A first Reed-Solomon encoded block comprises a media access control (MAC) header. The first Reed-Solomon encoded block is decoded. An error-detection check is performed on the first decoded Reed-Solomon encoded block.

公开(公告)号：US20170180004A1

公开(公告)日：2017-06-22

申请号：US15451534

申请日：2017-03-07

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Robert Liang

IPC: H04B3/54 ,  H04L29/08 ,  H04W48/10

CPC classification number: H04W48/10 ,  H04B3/542 ,  H04B2203/5408 ,  H04B2203/5416 ,  H04B2203/5433 ,  H04L41/0631 ,  H04L69/324 ,  H04W4/80 ,  H04W12/06 ,  H04W24/04 ,  H04W48/16 ,  H04W48/17

Abstract: In a disclosed embodiment, a power line communication (PLC) device sends an active channel scan request from a host layer to an adaptation layer. In response to the adaptation layer receiving the request, a MAC layer is instructed to broadcast a beacon request frame. The PLC device receives from each of one or more neighboring devices that respond to the beacon request frame a beacon frame including an address and a personal area network (PAN) identifier. A listing of PAN identifiers indicated by the beacon frames is provided to the host layer. The host layer selects a target network corresponding to a selected PAN identifier and selects one of the one or more neighboring devices associated with the selected PAN identifier as a target bootstrapping agent. The host layer instructs the adaptation layer to join the target network using the target bootstrapping agent.

公开(公告)号：US20170142237A1

公开(公告)日：2017-05-18

申请号：US15419045

申请日：2017-01-30

Applicant: Texas Instruments Incorporated

Inventor： Gang Xu ,  Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Anand G Dabak ,  Tarkesh Pande ,  Il Han Kim ,  Xiaolin Lu

IPC: H04L29/06 ,  H04B3/54

CPC classification number: H04L69/22 ,  H04B3/54 ,  H04B3/542 ,  H04B2203/5408

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.

公开(公告)号：US09584186B2

公开(公告)日：2017-02-28

申请号：US15072946

申请日：2016-03-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Anand G. Dabak

IPC: H04B3/54 ,  H04B3/30 ,  H04H20/42 ,  H04L5/00 ,  H04L25/02

CPC classification number: H04B3/544 ,  H04B3/30 ,  H04B3/54 ,  H04B3/542 ,  H04B2203/5408 ,  H04H20/42 ,  H04L5/005 ,  H04L25/024

Abstract: A communications device for Multi-Tone Mask (MTM) mode communications at a first router on a powerline communications (PLC) channel in a PLC network including a subnetwork including at least said first router associated with a plurality of nodes, comprising. A memory which stores a broadcast transmission MTM (BT-MTM) communications algorithm. A modem with processor is coupled to the memory. The processor is programmed to implement said BT-MTM communications algorithm, said BT-MTM communications algorithm.

Abstract translation: 包括在包括至少包括与多个节点相关联的所述第一路由器的子网络的PLC网络中的电力线通信（PLC）通道上的第一路由器处的多音调掩模（MTM）模式通信的通信设备。 存储广播传输MTM（BT-MTM）通信算法的存储器。 具有处理器的调制解调器耦合到存储器。 该处理器被编程为实现所述BT-MTM通信算法，所述BT-MTM通信算法。

公开(公告)号：US09379904B2

公开(公告)日：2016-06-28

申请号：US15001925

申请日：2016-01-20

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Anand G. Dabak

IPC: H04L12/413 ,  H04L29/06 ,  H04B3/54

CPC classification number: H04L12/413 ,  H04B3/54 ,  H04B3/542 ,  H04B2203/5408 ,  H04B2203/5433 ,  H04L69/02

Abstract: Power Line Communications (PLC) device for enhanced carrier sense multiple access (CSMA) protocols are described. The PLC device includes a modem, an AC interface and a PLC engine. The engine is configured for transmitting PLC packets over a plurality of electrical wires using a particular channel. Transmitting a normal priority packet may include attempting to access a communications channel to transmit a frame after a backoff time proportional to a randomly generated number within a contention window (CW), the CW having an initial value carried over from a previous transmission of a different frame. Additionally or alternatively, some of techniques described herein may facilitate the spreading of the time over which devices attempt to transmit packets, thereby reducing the probability of collisions using, for example, Additive Decrease Multiplicative Increase (ADMI) mechanisms.

Abstract translation: 描述了用于增强载波侦听多路访问（CSMA）协议的电力线通信（PLC）设备。 PLC设备包括调制解调器，AC接口和PLC引擎。 发动机被配置为使用特定通道在多个电线上传输PLC分组。 发送正常优先级分组可以包括尝试在与竞争窗口（CW）中的随机生成的数字成比例的退避时间之后访问通信信道以发送帧，所述CW具有从先前的不同的传输中携带的初始值 帧。 附加地或替代地，本文描述的技术中的一些技术可以有助于扩展这些设备尝试发送分组的时间，由此例如使用添加减少乘数增加（ADMI）机制来减少冲突的概率。