公开(公告)号：US20120300700A1

公开(公告)日：2012-11-29

申请号：US13473323

申请日：2012-05-16

Applicant: KUMARAN VIJAYASANKAR ,  RAMANUJA VEDANTHAM ,  XIAOLIN LU

Inventor： KUMARAN VIJAYASANKAR ,  RAMANUJA VEDANTHAM ,  XIAOLIN LU

IPC: H04L12/56 ,  H04W40/00

CPC classification number: H02J13/0006 ,  H04L43/0811 ,  H04L43/10 ,  H04L47/28 ,  H04L67/12 ,  H04L69/28 ,  H04W84/18 ,  Y04S40/168

Abstract: A method of communicating in a network having a plurality of nodes including a base node (BN), and a plurality of service nodes (SNs) having at least one switch node (SW) and at least one terminal node (TN). The method includes at least one of a) a first SN from the plurality of SNs receiving (i) a data/ALV_B/ACK frame from the BN or (ii) a beacon from the BN or SW, and restarting a first KA timer at the first SN upon (i) or (ii), and b) restarting an ALV_S timer at the BN for the first SN upon receiving a data/ALV_S/ACK frame from the first SN.

Abstract translation: 一种在具有多个节点的网络中通信的方法，所述多个节点包括基本节点（BN）以及具有至少一个交换节点（SW）和至少一个终端节点（TN）的多个服务节点（SN）。 所述方法包括以下中的至少一个：a）来自所述多个SN的第一SN接收（i）来自所述BN的数据/ ALV_B / ACK帧，或者（ii）来自所述BN或SW的信标，以及重新启动第一KA定时器 （i）或（ii）中的第一SN，以及b）当从第一SN接收到数据/ ALV_S / ACK帧时，在BN处为第一SN重新启动ALV_S定时器。

公开(公告)号：US20120275326A1

公开(公告)日：2012-11-01

申请号：US13457590

申请日：2012-04-27

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

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

IPC: H04L12/26

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：US20120236876A1

公开(公告)日：2012-09-20

申请号：US13408521

申请日：2012-02-29

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

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

IPC: H04J3/16

CPC classification number: H04L12/413 ,  H04B3/54 ,  H04B3/56 ,  H04B2203/5416 ,  H04B2203/5466 ,  H04L12/2838 ,  H04L2012/2843

Abstract: Systems and methods for designing, using, and/or implementing media access control (MAC) protocols with subbanding are described. In some embodiments, a method may include receiving a beacon packet during one of a plurality of beacon slots of a superframe, each beacon slot corresponding to one of a plurality of different downlink subbands. The method may also include identifying, based on the received beacon packet, contention access periods following the beacon slots, each of the contention access periods corresponding to one of a plurality of different uplink subbands. The method may further include transmitting an information packet over each of the plurality of uplink subbands during the contention access periods. Then, the method may include receiving, during a guaranteed time slot following the contention access periods, an indication of a selected one of the plurality of uplink subbands to be used in a subsequent communications.

Abstract translation: 描述了用于设计，使用和/或实现具有子带的媒体访问控制（MAC）协议的系统和方法。 在一些实施例中，一种方法可以包括在超帧的多个信标时隙之一期间接收信标分组，每个信标时隙对应于多个不同的下行链路子带中的一个。 该方法还可以包括基于接收到的信标分组来识别在信标时隙之后的争用接入周期，每个竞争接入周期对应于多个不同的上行链路子带之一。 该方法还可以包括在竞争访问周期期间在多个上行链路子带中的每一个上传输信息分组。 然后，该方法可以包括在竞争访问周期之后的保证时隙期间接收要在后续通信中使用的多个上行链路子带中所选择的一个的指示。

公开(公告)号：US20120236875A1

公开(公告)日：2012-09-20

申请号：US13421593

申请日：2012-03-15

Applicant: Kumaran Vijayasankar ,  Shu Du ,  Anand G. Dabak ,  Badri N. Varadarajan

Inventor： Kumaran Vijayasankar ,  Shu Du ,  Anand G. Dabak ,  Badri N. Varadarajan

IPC: H04J3/00 ,  H04L12/56 ,  H04B3/54

CPC classification number: H04L12/2838 ,  H04B3/54 ,  H04B3/56 ,  H04B2203/5416 ,  H04B2203/5466 ,  H04L12/413 ,  H04L2012/2843

Abstract: Systems and methods for designing, using, and/or implementing slotted channel access techniques in network communications are described. In some embodiments, a method may include selecting one of a plurality of time slots within a contention access period (CAP), each of the plurality of time slots having a predetermined duration, and transmitting a packet during the selected time slot. For example, the time slot may be selected randomly or based on a round-robin algorithm. In some implementations, the duration of each of the plurality of time slots may correspond and/or be equal to: (a) a duration of a data packet of maximum size, (b) a sum of durations of a request-to-send packet, an interframe space, and a clear-to-send packet, and/or (c) a duration of a guaranteed time slot (GTS) or contention free period (CFP) request packet, as prescribed by a given communication protocol or standard.

Abstract translation: 描述了在网络通信中设计，使用和/或实现时隙信道接入技术的系统和方法。 在一些实施例中，一种方法可以包括选择争用访问周期（CAP）中的多个时隙中的一个，多个时隙中的每个时隙具有预定的持续时间，并且在所选择的时隙期间发送分组。 例如，可以随机地或基于循环算法选择时隙。 在一些实现中，多个时隙中的每一个的持续时间可以对应于和/或等于：（a）最大大小的数据分组的持续时间，（b）请求发送的持续时间之和 分组，帧间间隔和清除发送分组，和/或（c）由给定通信协议或标准规定的保证时隙（GTS）或无争用周期（CFP）请求分组的持续时间 。

公开(公告)号：US09379773B2

公开(公告)日：2016-06-28

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: H04B3/54 ,  H04L12/26

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: 在“PRIME”（“PoweRline Intelligent Metering Evolution”）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：US08995437B2

公开(公告)日：2015-03-31

申请号：US13415597

申请日：2012-03-08

Applicant: Kumaran Vijayasankar ,  Ramanuja Vedantham

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham

IPC: H04L12/40 ,  H04L12/413 ,  H04L1/16

CPC classification number: H04L12/413 ,  H04B3/542 ,  H04B3/544 ,  H04B2203/5408 ,  H04B2203/5454 ,  H04L1/0041 ,  H04L1/0065 ,  H04L1/0067 ,  H04L1/08 ,  H04L1/1671 ,  H04L1/18 ,  H04L5/0044 ,  H04L5/0094 ,  H04L27/2601 ,  H04L27/2646

Abstract: Segmented frames of data may be transmitted from a transmitting device using conflict free slots (CFS) within a carrier sense multiple access with collision avoidance (CSMA/CA) protocol on a noisy media. At a receiver, a segmented frame of data is received. The data is represented by a plurality of tones. If requested by the transmitter, a tone map response command is prepared that specifies a set of optimized tone map parameters by analyzing the received frame of data. Any previously determined tone map response commands to the transmitting device are deleted. A sequence of frame segments may be received in conflict free slots, but only one tone map response is transmitted to the transmitting device after receiving the entire sequence of frame segments.

Abstract translation: 数据帧可以在具有冲突避免（CSMA / CA）协议的载波侦听多路访问中使用无冲突时隙（CFS）从发送设备发送。 在接收机处，接收分段的数据帧。 数据由多个音调表示。 如果由发射机请求，则通过分析接收的数据帧来准备一个音调映射响应命令，该命令指定一组优化的音调映射参数。 任何先前确定的发送设备的音调映射响应命令被删除。 可以在无冲突时隙中接收帧序列，但是在接收到整个帧段序列之后，只有一个音调映射响应被发送到发送设备。

公开(公告)号：US08787195B2

公开(公告)日：2014-07-22

申请号：US13531324

申请日：2012-06-22

Applicant: Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Robert Liang ,  Susan Yim ,  Xiaolin Lu

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Robert Liang ,  Susan Yim ,  Xiaolin Lu

IPC: H04L12/26

CPC classification number: H04B3/542 ,  H04L5/0007 ,  H04L25/0264

Abstract: Systems and methods for beacon selection in communication networks are described. In various implementations, these systems and methods may be applicable to Power Line Communications (PLC). For example, a method may include performing, using a terminal device deployed in a communications network, receiving a beacon transmitted by a switch device within the communications network and, in response to the terminal device having had a previous connection with the switch device, determining a connection time of the previous connection. The method may also include performing at least one of: adding the switch device to a blacklist in response to the connection time being smaller than a first threshold value, or selecting the switch device for subsequent communication in response to the connection time being greater than a second threshold value.

Abstract translation: 描述了通信网络中信标选择的系统和方法。 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部署在通信网络中的终端设备来接收由通信网络内的交换设备发送的信标，并且响应于终端设备已经与交换设备之前的连接，确定 上一次连接的连接时间。 该方法还可以包括执行以下至少之一：响应于小于第一阈值的连接时间将交换设备添加到黑名单中，或者响应于连接时间大于第一阈值来选择交换设备进行后续通信 第二阈值。

公开(公告)号：US08670458B2

公开(公告)日：2014-03-11

申请号：US13421593

申请日：2012-03-15

Applicant: Kumaran Vijayasankar ,  Shu Du ,  Anand G. Dabak ,  Badri N. Varadarajan

Inventor： Kumaran Vijayasankar ,  Shu Du ,  Anand G. Dabak ,  Badri N. Varadarajan

IPC: H04L12/43 ,  H04B7/212

CPC classification number: H04L12/2838 ,  H04B3/54 ,  H04B3/56 ,  H04B2203/5416 ,  H04B2203/5466 ,  H04L12/413 ,  H04L2012/2843

Abstract: Systems and methods for designing, using, and/or implementing slotted channel access techniques in network communications are described. In some embodiments, a method may include selecting one of a plurality of time slots within a contention access period (CAP), each of the plurality of time slots having a predetermined duration, and transmitting a packet during the selected time slot. For example, the time slot may be selected randomly or based on a round-robin algorithm. In some implementations, the duration of each of the plurality of time slots may correspond and/or be equal to: (a) a duration of a data packet of maximum size, (b) a sum of durations of a request-to-send packet, an interframe space, and a clear-to-send packet, and/or (c) a duration of a guaranteed time slot (GTS) or contention free period (CFP) request packet, as prescribed by a given communication protocol or standard.

Abstract translation: 描述了在网络通信中设计，使用和/或实现时隙信道接入技术的系统和方法。 在一些实施例中，一种方法可以包括选择争用访问周期（CAP）中的多个时隙中的一个，多个时隙中的每个时隙具有预定的持续时间，并且在所选择的时隙期间发送分组。 例如，可以随机地或基于循环算法选择时隙。 在一些实现中，多个时隙中的每一个的持续时间可以对应于和/或等于：（a）最大大小的数据分组的持续时间，（b）请求发送的持续时间之和 分组，帧间间隔和清除发送分组，和/或（c）由给定通信协议或标准规定的保证时隙（GTS）或无争用周期（CFP）请求分组的持续时间 。

公开(公告)号：US20130049939A1

公开(公告)日：2013-02-28

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: G08C19/12

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.

公开(公告)号：US20120320932A1

公开(公告)日：2012-12-20

申请号：US13528667

申请日：2012-06-20

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

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

IPC: H04L29/02 ,  H04B3/54

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

Abstract: A method of powerline communications including a first node and at least a second node on a PLC channel in a PLC network. The first node sends a physical layer (PHY) data frame on the PLC channel including a preamble, PHY header, a MAC header and a MAC payload. The PHY header includes a destination address field having a destination address therein. The second node receives the data frame. The second node compares its network address to the destination address before decoding the MAC header and MAC payload, providing power savings by allowing the second node to not decode the MAC header or MAC payload if its network address does not match the destination address in the PHY header of the data frame.

Abstract translation: 一种电力线通信方法，包括PLC网络中PLC通道上的第一节点和至少第二节点。 第一节点在PLC信道上发送物理层（PHY）数据帧，包括前导码，PHY头，MAC头和MAC有效载荷。 PHY标头包括其中具有目的地地址的目的地地址字段。 第二个节点接收数据帧。 第二节点在解码MAC报头和MAC有效载荷之前将其网络地址与目标地址进行比较，通过允许第二节点如果其网络地址与PHY中的目标地址不匹配，则不解码MAC报头或MAC有效载荷，从而提供功率节省 数据帧的头。