公开(公告)号：US08966337B2

公开(公告)日：2015-02-24

申请号：US13528191

申请日：2012-06-20

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

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

IPC: H03M13/00 ,  G06F11/10 ,  H03M13/09

CPC classification number: G06F11/1004 ,  H03M13/09

Abstract: A method of powerline communications including a first node and at least a second node on a powerline communications (PLC) channel in a PLC network. The first node sends a physical layer (PHY) data frame on the PLC channel including a preamble, a PHY header, a MAC header and a MAC payload. The MAC header includes a Cyclic Redundancy Check (CRC) field (MH-CRC field). The second node receives the data frame, parses the MAC header to reach the MH-CRC field, and performs CRC verification using the MH-CRC field to verify the MAC header. If the CRC verification is successful, (i) the second node parses another portion of the MAC header to identify a destination address of the data frame and (ii) to determine whether the data frame is intended for the second node from the destination address.

Abstract translation: 一种包括PLC网络中电力线通信（PLC）通道上的第一节点和至少第二节点的电力线通信的方法。 第一节点在PLC信道上发送物理层（PHY）数据帧，包括前同步码，PHY报头，MAC报头和MAC有效载荷。 MAC报头包括循环冗余校验（CRC）字段（MH-CRC字段）。 第二节点接收数据帧，解析MAC报头到达MH-CRC字段，并使用MH-CRC字段进行CRC校验，以验证MAC报头。 如果CRC验证成功，则（i）第二节点解析MAC报头的另一部分以识别数据帧的目的地址，以及（ii）从目的地地址确定数据帧是否用于第二节点。

公开(公告)号：US08964786B2

公开(公告)日：2015-02-24

申请号：US13435862

申请日：2012-03-30

Applicant: Kumaran Vijayasankar ,  Shu Du ,  Anand Dabak ,  Badri Varadarajan ,  Il Han Kim ,  Xiaolin Lu

Inventor： Kumaran Vijayasankar ,  Shu Du ,  Anand Dabak ,  Badri Varadarajan ,  Il Han Kim ,  Xiaolin Lu

IPC: H04J4/00 ,  H04B3/54 ,  H04L5/00

CPC classification number: H04B3/542 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/0073

Abstract: Systems and methods for designing, using, and/or implementing communications in beacon-enabled networks are described. In various implementations, these systems and methods may be applicable to power line communications (PLC). For example, a method may include identifying one of a plurality of orthogonal superframes. The identified superframe may include beacon slots and contention access period (CAP) slots. The beacon slots may follow a sequence of two or more frequency subbands, and the CAP slots may follow the same sequence of two or more frequency subbands. Also, the sequence of two or more frequency subbands may be distinct from other sequences of two or more frequency subbands followed by other beacon slots and CAP slots within others of the plurality of available superframes. The method may then include communicating with another device using the identified superframe.

Abstract translation: 描述了在启用信标的网络中设计，使用和/或实现通信的系统和方法。 在各种实现中，这些系统和方法可以应用于电力线通信（PLC）。 例如，方法可以包括识别多个正交超帧中的一个。 所识别的超帧可以包括信标时隙和竞争接入时隙（CAP）时隙。 信标时隙可以遵循两个或更多个频率子带的序列，并且CAP时隙可以遵循两个或更多个频率子带的相同序列。 而且，两个或多个频率子带的序列可以与两个或多个频率子带的其他序列不同，后面是多个可用超帧中的其他信标时隙和CAP时隙。 该方法然后可以包括使用所识别的超帧与另一设备进行通信。

公开(公告)号：US20140079142A1

公开(公告)日：2014-03-20

申请号：US13620829

申请日：2012-09-15

Applicant: Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Xiaolin Lu

Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Xiaolin Lu

IPC: H04L25/00

CPC classification number: H04L41/12 ,  H04B3/00 ,  H04B3/46 ,  H04B3/544

Abstract: 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.

Abstract translation: 用于促进终端节点切换PLC网络中的节点的算法可减少整体网络开销和冲突，同时确保适当选择交换节点并最小化PLC网络中的级别数量。 它还确保提供具有适当信噪比（SNR）的终端节点。 希望具有较少级别的网络。 所公开的方法有利于更接近DC的节点将其推广为交换节点。 这是通过等待与离DC更远的节点相比更靠近DC的节点的较少数量的PNPDU来实现的。

公开(公告)号：US20130194965A1

公开(公告)日：2013-08-01

申请号：US13473359

申请日：2012-05-16

Applicant: RAMANUJA VEDANTHAM ,  KUMARAN VIJAYASANKAR ,  RAM KRISHNAN

Inventor： RAMANUJA VEDANTHAM ,  KUMARAN VIJAYASANKAR ,  RAM KRISHNAN

IPC: H04L12/28 ,  H04W84/18

CPC classification number: H04W76/25 ,  H04W84/18

Abstract: A method of communications in a network having plurality of nodes including a base node (BN) and a plurality of levels (i) each including at least one service node (SN). The number (Ni(t)) of SNs registered in each of a plurality of i are determined. The current Keep Alive timer out (KA_TO) value for a KA timer at the BN is dynamically adjusted to an updated KA_TO value based on Ni(t) and i. Dynamically adjusting KA_TO values reduces the KA message overhead the network compared to known KA_TO value implementations.

Abstract translation: 一种具有多个节点的网络中的通信方法，所述多个节点包括基本节点（BN）和多个级别（i），每个级别包括至少一个服务节点（SN）。 确定登记在多个i中的每一个中的SN的数量（Ni（t））。 基于Ni（t）和i，动态调整BN处的KA定时器的当前Keep Alive定时器输出（KA_TO）值为更新的KA_TO值。 与已知的KA_TO值实现相比，动态调整KA_TO值可以降低网络的KA消息开销。

公开(公告)号：US20120281717A1

公开(公告)日：2012-11-08

申请号：US13457638

申请日：2012-04-27

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

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

IPC: H04B3/54 ,  H04J4/00 ,  H04J3/00

CPC classification number: H04B3/544 ,  H04B3/542 ,  H04B2203/5408 ,  H04B2203/5466 ,  H04B2203/5483 ,  H04B2203/5491 ,  H04L5/0044 ,  H04L5/0094 ,  H04L12/6418 ,  H04L25/0272

Abstract: Systems and methods for designing, using, and/or implementing superframe coordination in beacon-enabled networks are described. In various implementations, these systems and methods may be applicable to Power Line Communications (PLC). For example, a method may include implementing a Media Access Control (MAC) superframe using a communication device. The MAC superframe may include a plurality of beacon slots, a plurality of Contention Access Period (CAP) slots following the plurality of beacon slots, a Contention Free Period (CFP) poll access slot following the plurality of CAP slots, a CFP slot following the CFP poll access slot, an inactivity period following the CFP slot, a beacon region following the inactivity period, and a communication slot following the beacon region. The method may also include communicating with another communication device using the MAC superframe.

Abstract translation: 描述了在启用信标的网络中设计，使用和/或实现超帧协调的系统和方法。 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，一种方法可以包括使用通信设备实现媒体访问控制（MAC）超帧。 MAC超帧可以包括多个信标时隙，在多个信标时隙之后的多个争用接入周期（CAP）时隙，跟随在多个CAP时隙之后的无竞争周期（CFP）轮询接入时隙，后面的CFP时隙 CFP轮询接入时隙，CFP时隙之后的不活动时段，跟随非活动时段的信标区域以及信标区域之后的通信时隙。 该方法还可以包括使用MAC超帧与另一通信设备进行通信。

公开(公告)号：US20120263189A1

公开(公告)日：2012-10-18

申请号：US13443123

申请日：2012-04-10

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

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

IPC: H04B3/54

CPC classification number: H04B3/544 ,  H04L5/0007 ,  H04L5/0053 ,  H04L25/0272

Abstract: Systems and methods for designing, using, and/or implementing beacon-enabled communications for variable payload transfers are described. In various embodiments, these systems and methods may be applicable to power line communications (PLC). For example, a method may include implementing a superframe having a plurality of beacon slots, a plurality of intermediate slots following the beacon slots, and a poll-based Contention Free Period (CFP) slot following the intermediate slots. Each of the beacon slots and each of the intermediate slots may correspond to a respective one of a plurality of frequency subbands, and the poll-based CFP slot may correspond to a combination of the plurality of frequency subbands. The method may also include receiving a poll request over a first of the plurality of frequency subbands during the poll-based CFP slot, and then transmitting a data packet over a second of the plurality of frequency subbands during the poll-based CFP slot.

Abstract translation: 描述了用于设计，使用和/或实施用于可变有效载荷传输的信标启用通信的系统和方法。 在各种实施例中，这些系统和方法可以适用于电力线通信（PLC）。 例如，一种方法可以包括实现具有多个信标时隙的多帧，在信标时隙之后的多个中间时隙，以及在中间时隙之后的基于轮询的无竞争周期（CFP）时隙。 每个信标时隙和每个中间时隙可以对应于多个频率子带中的相应一个，并且基于轮询的CFP时隙可以对应于多个频率子带的组合。 该方法还可以包括在基于轮询的CFP时隙期间在多个频率子带中的第一个频带上接收轮询请求，然后在基于轮询的CFP时隙期间在多个频率子带中的第二个频带上发送数据分组。

公开(公告)号：US09030932B2

公开(公告)日：2015-05-12

申请号：US13593428

申请日：2012-08-23

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

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

IPC: H04L12/413 ,  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：US20130051446A1

公开(公告)日：2013-02-28

申请号：US13593159

申请日：2012-08-23

Applicant: Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande ,  Il Han Kim

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

IPC: H04L12/26 ,  H04B3/54

CPC classification number: H04B3/54 ,  H04B2203/5408 ,  H04B2203/5416 ,  H04B2203/542 ,  H04B2203/5466

Abstract: Phase detection between service nodes in a as “PRIME” (“PoweRline Intelligent Metering Evolution”) communications network, in which the service nodes are connected to one phase of a three-phase power distribution network. A service node joining a sub-network receives packet data units from other service nodes in the sub-network, including those that can potentially serve as a switch node to which the joining service node can register. The joining service node measures an elapsed time between a zero crossing of the AC power waveform at its phase and the start of a frame in the received packet data units. This elapsed time is compared with a similar zero crossing gap communicated by other service nodes in the packet data units, to identify the relative phases to which the two service nodes are connected.

Abstract translation: 作为PRIME（PoweRline智能计量演进）通信网络中的服务节点之间的相位检测，其中服务节点连接到三相配电网络的一相。 加入子网络的服务节点从子网络中的其他服务节点接收分组数据单元，包括可能充当加入服务节点可以注册的交换节点的那些节点。 加入服务节点测量在其相位处的AC功率波形的过零点与接收的分组数据单元中的帧的开始之间的经过时间。 将经过的时间与由分组数据单元中的其他服务节点通信的类似的零交叉间隔进行比较，以识别两个服务节点所连接的相对阶段。

公开(公告)号：US20130034110A1

公开(公告)日：2013-02-07

申请号：US13564440

申请日：2012-08-01

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

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

IPC: H04B3/54

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

Abstract: A method of Multi-Tone Mask (MTM) mode communications in a PLC network including a first router associated with a plurality of nodes. A super-frame spanning a time period is received within the subnetwork. The super-frame includes beacon frames in beacon slots within a beacon period, with each beacon frame in one of N TMs, a contention access period (CAP) including a plurality of CAP slots provided for each TM, and a poll-based contention-free period (CFP). The beacon frames provide time assignments within the super-frame including time assignments for the CAP slots and for the CFP, and TM assignments for the TMs in the CAP slots. One of nodes, another router in the subnetwork, or a router in another subnetwork transmits a broadcast frame on the PLC channel. The first router forwards the broadcast frame on the PLC channel in each of the N TMs within the time period.

Abstract translation: 一种在PLC网络中的多音调掩模（MTM）模式通信的方法，包括与多个节点相关联的第一路由器。 在子网内接收跨越时间段的超帧。 超帧包括在信标周期内的信标时隙中的信标帧，每个信标帧在N个TM之一中，竞争接入周期（CAP）包括为每个TM提供的多个CAP时隙，以及基于轮询的争用 - 免费期（CFP）。 信标帧提供超帧内的时间分配，包括CAP时隙的指定时间，以及CAP时隙中的CFP和TM分配。 节点之一，子网中的另一路由器或另一子网中的路由器在PLC信道上发送广播帧。 第一台路由器在该时间段内在每个N TM中的PLC信道上转发广播帧。

公开(公告)号：US20120320996A1

公开(公告)日：2012-12-20

申请号：US13526227

申请日：2012-06-18

Applicant: ANAND G. DABAK ,  TARKESH PANDE ,  IL HAN KIM ,  RAMANUJA VEDANTHAM ,  KUMARAN VIJAYASANKAR ,  GANG XU

Inventor： ANAND G. DABAK ,  TARKESH PANDE ,  IL HAN KIM ,  RAMANUJA VEDANTHAM ,  KUMARAN VIJAYASANKAR ,  GANG XU

IPC: H04B3/00

CPC classification number: H04B3/54 ,  H04B2203/5416 ,  H04B2203/5425 ,  H04B2203/5495

Abstract: A method of powerline communications between a plurality of nodes on a powerline communications (PLC) channel including a first node and a second node. At least one communication quality measure is determined for the PLC channel. Based on the communication quality measure, a preamble of a data frame is dynamically switched between a reference preamble having a reference symbol length including a reference number of syncP symbols and a reference number of syncM symbols and at least a first extended preamble having an extended symbol length that is greater than (>) the reference symbol length. The data frame is then transmitted on the PLC channel.

Abstract translation: 一种在包括第一节点和第二节点的电力线通信（PLC）信道上的多个节点之间的电力线通信的方法。 为PLC通道确定至少一个通信质量度量。 基于通信质量测量，在具有包括参考数量的syncP符号的参考符号长度和参考数量的syncM符号的参考前同步码和至少具有扩展符号的第一扩展前同步码之间动态地切换数据帧的前导码 长度大于（>）参考符号长度。 然后在PLC通道上传输数据帧。