公开(公告)号：US20160119028A1

公开(公告)日：2016-04-28

申请号：US14985898

申请日：2015-12-31

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04B3/54 ,  H04L12/413

CPC classification number: H04B3/544 ,  H04B2203/5408 ,  H04B2203/5433 ,  H04B2203/5445 ,  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.

Abstract translation: 公开了一种用于在PLC节点中设置载波感测机构的系统和方法。 在PLC标准中，通过使节点检测到公共前同步码并通过共存帧间空间（cEIFS）时间段进行后退来实现共存，以帮助节点避免干扰其他技术。 在一个实施例中，PHY原语从PHY发送到MAC，知道已经有前导码检测。 可以使用两级指示 - 在解码整个帧之后接收到前导码和其他指示之后的一个指示。 MAC基于前导码检测设置载波侦听机制。

公开(公告)号：US09319238B2

公开(公告)日：2016-04-19

申请号：US14637262

申请日：2015-03-03

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04L12/413 ,  H04L12/927 ,  H04L12/40 ,  H04B3/54 ,  H04L12/28

CPC classification number: H04L12/413 ,  H04B3/542 ,  H04B2203/5433 ,  H04L12/283 ,  H04L12/40156 ,  H04L47/805 ,  H04L2012/2843

Abstract: Embodiments of a power line communication (PLC) transmitter device for overlapping priority contention windows are presented. A processor is configured to perform a physical channel sense operation to detect an idle channel on a PLC network. A transmitter transmits a normal priority data packet on the channel during a high priority contention window. In another embodiment, a Normal Priority Contention Window (NPCW) is allowed to overlap with a High Priority Contention Window (HPCW). The minimum contention window for the normal priority frames (i.e., NPCW) is equal to or longer than the contention window for high priority frames (i.e., HPCW). By making the NPCW longer than the HPCW, the high priority frames will have a better chance than normal priority frames to get access to the channel on transmission reattempts.

Abstract translation: 提出了用于重叠优先级争用窗口的电力线通信（PLC）发射机设备的实施例。 处理器被配置为执行物理信道检测操作以检测PLC网络上的空闲信道。 发射机在高优先权竞争窗口期间在信道上发送普通优先级数据分组。 在另一个实施例中，允许正常优先权竞争窗口（NPCW）与高优先权争用窗口（HPCW）重叠。 正常优先级帧（即NPCW）的最小竞争窗口等于或大于高优先级帧（即HPCW）的争用窗口。 通过使NPCW比HPCW长，高优先级帧将比正常优先级帧更有可能在传输重新尝试时访问该信道。

公开(公告)号：US09282504B2

公开(公告)日：2016-03-08

申请号：US14825245

申请日：2015-08-13

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Robert Liang

IPC: H04W48/10 ,  H04W4/00 ,  H04W24/04 ,  H04B3/54 ,  H04L12/24 ,  H04W48/00

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: Systems and methods for routing protocols for power line communications (PLC) are described. In some embodiments, a method performed by a PLC device, such as a PLC meter, may include active discovering and identifying at least one bootstrapping agent and a personal area network (PAN) identifier for one or more networks that are operating within a personal operating space of the PLC device. The device selects a target bootstrapping agent to use for the join process with a target network. The target bootstrapping agent may be selected from a list of bootstrapping agents associated with the target PAN identifier. If the attempt to join the target network fails, then the device further determines if other bootstrapping agents are associated with the target PAN identifier. The device selects an alternate target bootstrapping agent from the other bootstrapping agents that are associated with the target PAN identifier and reattempts the join process.

Abstract translation: 描述了用于电力线通信（PLC）的路由协议的系统和方法。 在一些实施例中，由诸如PLC计量器之类的PLC设备执行的方法可以包括主动发现和识别在个人操作中操作的一个或多个网络的至少一个自举代理和个人区域网络（PAN）标识符 PLC设备的空间。 设备选择目标引导代理用于与目标网络的连接进程。 可以从与目标PAN标识符相关联的引导代理的列表中选择目标引导代理。 如果加入目标网络的尝试失败，则设备进一步确定其他引导代理是否与目标PAN标识符相关联。 设备从与目标PAN标识符相关联的其他引导代理中选择备用目标引导代理，并重新尝试连接进程。

公开(公告)号：US09231658B2

公开(公告)日：2016-01-05

申请号：US13923097

申请日：2013-06-20

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04J3/02 ,  H04B3/54

CPC classification number: H04B3/544 ,  H04B2203/5408 ,  H04B2203/5433 ,  H04B2203/5445 ,  H04L12/413

Abstract: Systems and methods for setting a Network Allocation Vector (NAV) 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 NAV to EIFS if a native preamble is detected. The MAC sets NAV to cEIFS if only a coexistence preamble is detected or if a non-native preamble is detected.

Abstract translation: 公布了在PLC节点中设置网络分配向量（NAV）的系统和方法。 在PLC标准中，通过使节点检测到公共前同步码并通过共存帧间空间（cEIFS）时间段进行后退来实现共存，以帮助节点避免干扰其他技术。 在一个实施例中，PHY原语从PHY发送到MAC，知道已经有前导码检测。 可以使用两级指示 - 在解码整个帧之后接收到前导码和其他指示之后的一个指示。 如果检测到本机前导码，则MAC将NAV设置为EIFS。 如果仅检测到共存前导码或者是否检测到非本地前导码，则MAC将NAV设置为cEIFS。

公开(公告)号：US20150271062A1

公开(公告)日：2015-09-24

申请号：US14663415

申请日：2015-03-19

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Muhammad Owais Khan

IPC: H04L12/721 ,  H04L12/707 ,  H04B3/54

CPC classification number: H04L45/26 ,  H04B3/542 ,  H04L45/124 ,  H04L45/22

Abstract: 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.

Abstract translation: 通过使用载波侦听多址冲突避免（CSMA / CA）的具有多个节点的网络的传输的确定可以通过从目标为网络内的目的地节点的源节点广播路由请求（RREQ）分组来执行 ，使得RREQ由靠近源节点的第一组节点接收。 在首次接收到RREQ之后，多个节点中的每一个在等待随机的等待时间量之后重播RREQ。 在每个随机等待时间期间，节点在等待时间期间抑制节点收到的除了一个RREQ之外的所有节点。

公开(公告)号：US20150244541A1

公开(公告)日：2015-08-27

申请号：US14706118

申请日：2015-05-07

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: Systems and methods for enhanced carrier sense multiple access (CSMA) protocols are described. In various implementations, these systems and methods may be applicable to Power Line Communications (PLC). For example, a method 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）协议的系统和方法。 在各种实现中，这些系统和方法可以适用于电力线通信（PLC）。 例如，一种方法可以包括在与争用窗口（CW）中的随机生成的数字成比例的退避时间之后尝试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。

公开(公告)号：US09001844B2

公开(公告)日：2015-04-07

申请号：US13848056

申请日：2013-03-20

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04L12/413 ,  H04J3/02 ,  H04L12/927 ,  H04L12/40 ,  H04B3/54 ,  H04L12/28

CPC classification number: H04L12/413 ,  H04B3/542 ,  H04B2203/5433 ,  H04L12/283 ,  H04L12/40156 ,  H04L47/805 ,  H04L2012/2843

Abstract: Embodiments of methods and systems for overlapping priority contention windows in G3-PLC networks are presented. In one embodiment, a Normal Priority Contention Window (NPCW) is allowed to overlap with a High Priority Contention Window (HPCW). The minimum contention window for the normal priority frames (i.e., NPCW) is equal to or longer than the contention window for high priority frames (i.e., HPCW). By making the NPCW longer than the HPCW, the high priority frames will have a better chance than normal priority frames to get access to the channel on transmission reattempts.

Abstract translation: 介绍了在G3-PLC网络中重叠优先竞争窗口的方法和系统的实施例。 在一个实施例中，允许正常优先权竞争窗口（NPCW）与高优先权争用窗口（HPCW）重叠。 正常优先级帧（即NPCW）的最小竞争窗口等于或大于高优先级帧（即HPCW）的争用窗口。 通过使NPCW比HPCW长，高优先级帧将比正常优先级帧更有可能在传输重新尝试时访问该信道。

公开(公告)号：US20150063285A1

公开(公告)日：2015-03-05

申请号：US14538425

申请日：2014-11-11

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Anand G. Dabak ,  Badri N. Varadarajan

IPC: H04W72/04 ,  H04W72/12

CPC classification number: H04W72/0453 ,  H04B3/544 ,  H04L41/0833 ,  H04W72/1231 ,  Y04S40/162

Abstract: Systems and methods for designing, using, and/or implementing non-beacon network communications using frequency subbands are described. In various implementations, these systems and methods may be applicable to Power Line Communications (PLC). For example, a method may include transmitting a beacon request message over a given one of a plurality of frequency subbands, receiving a plurality of beacons in response to having transmitted the beacon request message, each of the plurality of beacons received over a respective one of the plurality of frequency subbands, and calculating a downlink quality report based, at least in part, upon the received beacons. The method may also include transmitting the downlink quality report over each of the plurality of frequency subbands and receiving a subband allocation command in response to having transmitted the downlink quality report, the subband allocation command indicating a downlink subband assignment and an uplink subband assignment.

Abstract translation: 描述了使用频率子带设计，使用和/或实现非信标网络通信的系统和方法。 在各种实现中，这些系统和方法可以适用于电力线通信（PLC）。 例如，一种方法可以包括在多个频率子带中的给定的一个频带上传送信标请求消息，响应于已经发送了信标请求消息来接收多个信标，多个信标中的每一个在 所述多个频率子带，并且至少部分地基于所接收的信标来计算下行链路质量报告。 该方法还可以包括：响应于已经发送下行链路质量报告，指示下行链路子带分配的子带分配命令和上行链路子带分配，在多个频率子带中的每一个上发送下行链路质量报告，并接收子带分配命令。

公开(公告)号：US20140301409A1

公开(公告)日：2014-10-09

申请号：US14246872

申请日：2014-04-07

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Ram Krishnan ,  Ramanuja Vedantham

IPC: H04L1/16 ,  H04L29/06

CPC classification number: H04L1/16 ,  H04L1/1671 ,  H04L69/324

Abstract: Method and apparatus for avoiding hidden node collisions in a communication network. A network communication device includes a packet transmitter. The packet transmitter is configured to subdivide a packet to be transmitted via a communication network into a plurality of segments based on the packet exceeding a predetermined maximum size, and to sequentially transmit the segments via the communication network. The packet transmitter is also configured to construct an acknowledgement packet responsive to reception of each segment of a packet received via the communication network. The acknowledgement packet includes a field indicating whether an additional segment of the packet is to be transmitted via the communication network. The packet transmitter is further configured to transmit the acknowledgement packet via the communication network.

Abstract translation: 用于避免通信网络中的隐藏节点冲突的方法和装置。 网络通信设备包括分组发射机。 分组发送器被配置为基于超过预定最大大小的分组将要经由通信网络发送的分组分割成多个分段，并且经由通信网络顺序发送分组。 分组发射机还被配置为响应于经由通信网络接收到的分组的每个分段的接收来构造确认分组。 确认分组包括指示是否要经由通信网络发送分组的附加分段的字段。 分组发射机还被配置为经由通信网络发送确认分组。

公开(公告)号：US20130301649A1

公开(公告)日：2013-11-14

申请号：US13889878

申请日：2013-05-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04L12/413

CPC classification number: H04L12/413 ,  H04B2203/5408 ,  H04B2203/5416 ,  H04B2203/5433 ,  H04B2203/5445

Abstract: Embodiments of methods and systems for Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) with a random backoff time on a Power Line Communication (PLC) network are disclosed. The CSMA/CA method is independent of the algorithm used to update a contention window, so any contention window algorithm is supported. The PLC node runs an energy detection process first and then uses preamble detection only after energy detection is positive, or the node may run both energy detection and preamble detection simultaneously. Upon detection of a possible transmission on a PLC line due to energy detection, the PLC node will freeze a backoff counter decrementing process and will then wait for preamble detection to complete. If no energy is detected on the line, or if no preamble is detected after energy is sensed on the line, then the node will transmit is allowed by the contention window value.

Abstract translation: 公开了在电力线通信（PLC）网络上具有随机退避时间的具有冲突避免的载波侦听多路访问（CSMA / CA）的方法和系统的实施例。 CSMA / CA方法独立于用于更新争用窗口的算法，因此支持任何争用窗口算法。 PLC节点首先运行能量检测过程，然后仅在能量检测为正时才使用前导码检测，或者节点可以同时运行能量检测和前导码检测。 在检测到由于能量检测在PLC线路上发生可能的传输时，PLC节点将冻结退避计数器递减处理，然后等待前导码检测完成。 如果在线路上没有检测到能量，或者如果在线路上感测到能量之后没有检测到前导码，则通过竞争窗口值允许节点发送。