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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
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。
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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
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。
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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
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。
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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。
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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
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。
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Patent Agency Ranking
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。
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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。
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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.
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公开(公告)号：US20120294377A1
公开(公告)日：2012-11-22
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: H04B3/00
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。
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公开(公告)号：US08929398B2
公开(公告)日：2015-01-06
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
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。
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