公开(公告)号：US09698864B2

公开(公告)日：2017-07-04

申请号：US15054512

申请日：2016-02-26

Applicant: Cisco Technology, Inc.

Inventor： Shmuel Shaffer ,  Sandeep Jay Shetty ,  Charles Okwudiafor ,  Jean-Philippe Vasseur

IPC: H04B1/713 ,  H04B1/7156 ,  H04B1/7143 ,  H04W72/04

CPC classification number: H04B1/7156 ,  H04B1/713 ,  H04B1/7143 ,  H04B2001/71563 ,  H04W72/0453

Abstract: In one embodiment, a management device determines a topology of nodes in a network. Based on the topology, frequency hopping sequences are assigned (and notified) to the nodes such that each particular node of a certain set of the nodes is assigned a frequency hopping sequence on which to transmit that is different than frequency hopping sequences of neighbors and hidden neighbors of that particular node. In another embodiment, a transmitting node first transmits a transmission indication signal on its particular frequency band based on its frequency hopping sequence, and then transmits a message on the particular frequency band. In a further embodiment, a receiving node listening to a plurality of frequency bands may detect the transmission indication signal on the particular frequency band. In response, the receiving node filters out all frequency bands other than the particular frequency band, and receives the following transmission on that particular frequency band.

公开(公告)号：US20140245055A1

公开(公告)日：2014-08-28

申请号：US14267205

申请日：2014-05-01

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Shmuel Shaffer ,  Jean-Philippe Vasseur ,  Sandeep Jay Shetty

IPC: G06F1/26

CPC classification number: G06F1/26 ,  G01R29/16 ,  G01R29/18 ,  H02J3/14 ,  H02J3/26 ,  Y02B70/3225 ,  Y02E40/50 ,  Y04S20/222

Abstract: In one embodiment, a device in a computer network monitors an alternating-current (AC) waveform of an electrical power source at the device, where the power source is part of a polyphase power source system. Once the device determines a particular phase of the polyphase power source system at the device, then the device joins a directed acyclic graph (DAG) specific to the particular phase. In another embodiment, a device detects a time of a zero crossing of the AC waveform, and may then determine a particular phase of the polyphase power source system at the device based on the time of the zero crossing relative to a corresponding location within a frequency hopping superframe of the computer network.

Abstract translation: 在一个实施例中，计算机网络中的设备监视设备处的电源的交流（AC）波形，其中电源是多相电源系统的一部分。 一旦器件确定器件上的多相电源系统的特定相位，器件将连接特定相位的有向非循环图（DAG）。 在另一个实施例中，设备检测AC波形的过零时间，然后可以基于相对于频率内的对应位置的过零点的时间来确定设备处的多相电源系统的特定相位 跳台超级计算机网络。

公开(公告)号：US20160182121A1

公开(公告)日：2016-06-23

申请号：US15054512

申请日：2016-02-26

Applicant: Cisco Technology, Inc.

Inventor： Shmuel Shaffer ,  Sandeep Jay Shetty ,  Charles Okwudiafor ,  Jean-Philippe Vasseur

IPC: H04B1/7156 ,  H04W72/04

CPC classification number: H04B1/7156 ,  H04B1/713 ,  H04B1/7143 ,  H04B2001/71563 ,  H04W72/0453

Abstract: In one embodiment, a management device determines a topology of nodes in a network. Based on the topology, frequency hopping sequences are assigned (and notified) to the nodes such that each particular node of a certain set of the nodes is assigned a frequency hopping sequence on which to transmit that is different than frequency hopping sequences of neighbors and hidden neighbors of that particular node. In another embodiment, a transmitting node first transmits a transmission indication signal on its particular frequency band based on its frequency hopping sequence, and then transmits a message on the particular frequency band. In a further embodiment, a receiving node listening to a plurality of frequency bands may detect the transmission indication signal on the particular frequency band. In response, the receiving node filters out all frequency bands other than the particular frequency band, and receives the following transmission on that particular frequency band.

Abstract translation: 在一个实施例中，管理设备确定网络中的节点的拓扑。 基于拓扑结构，跳频序列被分配（并被通知）给节点，使得特定节点集合的每个特定节点被分配跳频序列，在该跳频序列上发射不同于邻居的跳频序列和隐藏的跳频序列 该特定节点的邻居。 在另一个实施例中，发送节点首先基于其跳频序列在其特定频带上发送传输指示信号，然后在特定频带上发送消息。 在另一实施例中，收听多个频带的接收节点可以检测特定频带上的传输指示信号。 作为响应，接收节点滤除除了特定频带之外的所有频带，并在该特定频带上接收以下传输。

公开(公告)号：US09128689B2

公开(公告)日：2015-09-08

申请号：US14267205

申请日：2014-05-01

Applicant: Cisco Technology, Inc.

Inventor： Shmuel Shaffer ,  Jean-Philippe Vasseur ,  Sandeep Jay Shetty

IPC: G06F1/26 ,  G01R29/16 ,  G01R29/18 ,  H02J3/26

CPC classification number: G06F1/26 ,  G01R29/16 ,  G01R29/18 ,  H02J3/14 ,  H02J3/26 ,  Y02B70/3225 ,  Y02E40/50 ,  Y04S20/222

Abstract: In one embodiment, a device in a computer network monitors an alternating-current (AC) waveform of an electrical power source at the device, where the power source is part of a polyphase power source system. Once the device determines a particular phase of the polyphase power source system at the device, then the device joins a directed acyclic graph (DAG) specific to the particular phase. In another embodiment, a device detects a time of a zero crossing of the AC waveform, and may then determine a particular phase of the polyphase power source system at the device based on the time of the zero crossing relative to a corresponding location within a frequency hopping superframe of the computer network.

Abstract translation: 在一个实施例中，计算机网络中的设备监视设备处的电源的交流（AC）波形，其中电源是多相电源系统的一部分。 一旦器件确定器件上的多相电源系统的特定相位，器件将连接特定相位的有向非循环图（DAG）。 在另一个实施例中，设备检测AC波形的过零时间，然后可以基于相对于频率内的对应位置的过零点的时间来确定设备处的多相电源系统的特定相位 跳台超级计算机网络。