公开(公告)号：US10348554B2

公开(公告)日：2019-07-09

申请号：US15397589

申请日：2017-01-03

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Hang Jin

IPC: H04B3/46 ,  H04B3/52 ,  H04L12/24 ,  H04L12/26 ,  H04L29/08

Abstract: One embodiment is a method that includes retrieving key performance indicators from multi-tone signals captured by a data collector located in a cable network; identifying a fault signature based on the key performance indicators, in which the fault signature is identified based on phase domain analysis of a channel response; and accessing a data repository located in a cloud network for geographical information associated with the cable network. The method further includes determining a location of a fault in the cable network based on the fault signature and the geographical information, in which the determining further includes: determining a length of a fault cavity associated with the fault; identifying at least one segment having a length the same as the length of the fault cavity; identifying terminating devices associated with the at least one segment; and tagging the identified terminating devices as potentially faulty.

公开(公告)号：US10244435B2

公开(公告)日：2019-03-26

申请号：US15647109

申请日：2017-07-11

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Hang Jin ,  John T. Chapman

IPC: H04W36/00 ,  H04W36/04 ,  H04B3/23 ,  H04L12/28

Abstract: A method is described and in one embodiment includes providing a physical connection between a node and a user equipment at a subscriber premises via a cable connection, wherein the node comprises a Data Over Cable Service Interface Specification (“DOCSIS”) remote PHY device (“RPD”) collocated with a cellular small cell device; receiving at the node a cellular downlink (“DL”) data signal from a cellular network connected to the cellular small cell device; combining the received cellular DL data signal with a DOCSIS downstream (“DS”) signal from a cellular network connected to the DOCSIS RPD to create a combined DS data signal; and forwarding the combined DS data signal from the node to the user equipment via the cable connection.

公开(公告)号：US10135490B2

公开(公告)日：2018-11-20

申请号：US15483234

申请日：2017-04-10

Applicant: CISCO TECHNOLOGY, INC.

Inventor： John T. Chapman ,  Hang Jin ,  Tong Liu

IPC: H04B3/46 ,  H04B17/345 ,  H04L12/28 ,  H04L5/14

Abstract: An example apparatus comprises a processor, and a memory element in communication with the processor. The processor configured to send a first message to at least a first cable modem of a plurality of cable modems. The first message indicates an upstream test signal to be generated by the first cable modem within a predetermined portion of a frequency spectrum allocated for downstream communication. The processor is further configured to send a second message to at least a second cable modem of the plurality of cable modems. The second message indicates a downstream interference measurement to be performed on the upstream test signal by the second cable modem. The processor is further configured to receive at least one interference measurement result indicative of the downstream interference measurement, and determine at least one interference group for the plurality of cable modems based upon the at least one interference measurement result.

公开(公告)号：US09820275B2

公开(公告)日：2017-11-14

申请号：US15130629

申请日：2016-04-15

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Hang Jin ,  John T. Chapman ,  Gerard White ,  Alon Bernstein

IPC: H04K1/10 ,  G01R31/08 ,  H04W72/04 ,  H04W72/12 ,  H04W72/14 ,  H04L29/08

CPC classification number: H04W72/0446 ,  H04L47/72 ,  H04L47/76 ,  H04L47/788 ,  H04L47/822 ,  H04L47/823 ,  H04L67/16 ,  H04W72/1263 ,  H04W72/14

Abstract: A method is provided in one example embodiment and includes predicting a user average data rate for a cable modem; establishing a minimum bandwidth grant size and a maximum bandwidth grant size for the cable modem based on the predicted user average data rate; receiving from the cable modem a request for a particular amount of bandwidth; performing an overgrant if the particular amount of bandwidth is less than the minimum bandwidth grant size, in which the overgrant comprises granting to the cable modem more than the requested particular amount of bandwidth; and performing an undergrant if the particular amount of bandwidth is greater than the maximum bandwidth grant size, in which the undergrant comprises granting to the cable modem less than the requested particular amount of bandwidth.

公开(公告)号：US20170310539A1

公开(公告)日：2017-10-26

申请号：US15397589

申请日：2017-01-03

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Hang Jin

IPC: H04L12/24 ,  H04L29/08 ,  H04B3/52 ,  H04B3/46 ,  H04L12/26

CPC classification number: H04L41/0677 ,  H04B3/46 ,  H04B3/52 ,  H04L41/0631 ,  H04L41/147 ,  H04L41/16 ,  H04L41/5009 ,  H04L43/10 ,  H04L43/12 ,  H04L67/1097 ,  H04Q2213/13012

Abstract: One embodiment is a method that includes retrieving key performance indicators from multi-tone signals captured by a data collector located in a cable network; identifying a fault signature based on the key performance indicators, in which the fault signature is identified based on phase domain analysis of a channel response; and accessing a data repository located in a cloud network for geographical information associated with the cable network. The method further includes determining a location of a fault in the cable network based on the fault signature and the geographical information, in which the determining further includes: determining a length of a fault cavity associated with the fault; identifying at least one segment having a length the same as the length of the fault cavity; identifying terminating devices associated with the at least one segment; and tagging the identified terminating devices as potentially faulty.

公开(公告)号：US20170244445A1

公开(公告)日：2017-08-24

申请号：US15352445

申请日：2016-11-15

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Hang Jin ,  John T. Chapman

IPC: H04B3/23 ,  H04L5/14

Abstract: An example apparatus for supporting digital pre-distortion (DPD) and full duplex (FDX) in cable network environments is provided and includes a first path for signals being transmitted out of the apparatus, a second path for signals being received into the apparatus, a DPD actuator located on the first path, an amplifier located on the first path, an echo cancellation (EC) actuator located on the second path, and a data interface including a plurality of channels connecting the apparatus to a signal processor. DPD coefficients, EC coefficients and delay parameters are provided over the data interface from the signal processor to the apparatus. The DPD actuator predistorts signals on the first path using the DPD coefficients compensating for distortions introduced by the amplifier, and the EC actuator reduces interferences in signals on the second path using the EC coefficients and the delay parameters, facilitating FDX communication by the apparatus.

公开(公告)号：US20170019242A1

公开(公告)日：2017-01-19

申请号：US15052542

申请日：2016-02-24

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Hang Jin ,  John T. Chapman

IPC: H04L5/14 ,  H04B3/20

CPC classification number: H04L5/1461 ,  H04B3/20 ,  H04B3/32 ,  H04B3/487 ,  H04L12/2801

Abstract: An example method for characterizing interference relationships in full duplex cable network environments is provided and includes generating a global interfered list for a plurality of cable modems in the cable network and for a plurality of frequency ranges, generating a global interfering list for the plurality of cable modems and for the plurality of frequency ranges, assigning respective downstream reception frequency ranges and upstream transmission frequency ranges for the plurality of cable modems based on the global interfered list and the global interfering list, and transmitting to the cable modems corresponding assignment information comprising the respective assigned downstream reception frequency ranges and upstream transmission frequency ranges.

Abstract translation: 提供了用于表征全双工有线网络环境中的干扰关系的示例性方法，并且包括为有线网络中的多个电缆调制解调器和多个频率范围生成全局干扰列表，为多个电缆生成全局干扰列表 调制解调器和多个频率范围，基于全局受干扰列表和全局干扰列表分配多个电缆调制解调器的各个下行接收频率范围和上行传输频率范围，并向电缆调制解调器发送包括相应的 分配的下行接收频率范围和上行传输频率范围。

公开(公告)号：US09503180B2

公开(公告)日：2016-11-22

申请号：US14476969

申请日：2014-09-04

Applicant: Cisco Technology, Inc.

Inventor： Hang Jin ,  Tong Liu ,  Pawel Sowinski ,  De Fu Li ,  John Skrobko

IPC: H04J14/08 ,  H04B10/079 ,  H04J3/16 ,  H04L12/26 ,  H04L12/28

CPC classification number: H04B10/0795 ,  H04B10/0793 ,  H04J3/1694 ,  H04J14/086 ,  H04L12/2801 ,  H04L43/0882

Abstract: Presented herein are techniques for detection and avoidance of interference in a telecommunications network. In one example, a cable modem termination system (CMTS) is configured to receive upstream traffic from a plurality of cable modems. The CMTS detects collision characteristics resulting from substantially simultaneous transmissions from different combinations of the cable modems. Based on the detected collision characteristics, the CMTS designates/identifies collision groups for each of a plurality of the cable modems. After designation of the collision groups, the CMTS schedules upstream transmissions by the plurality of cable modems such that cable modems within the same collision group do not transmit within a same time frame and such that two or more cable modems that are not within the same collision group may transmit within a same time frame.

Abstract translation: 这里提出的是用于检测和避免电信网络中的干扰的技术。 在一个示例中，电缆调制解调器终端系统（CMTS）被配置为从多个电缆调制解调器接收上行流量。 CMTS检测来自电缆调制解调器的不同组合的基本同时传输产生的冲突特性。 基于检测到的碰撞特性，CMTS指定/识别多个电缆调制解调器中的每一个的冲突组。 在指定冲突组之后，CMTS调度多个电缆调制解调器的上行传输，使得同一冲突组内的电缆调制解调器在相同的时间帧内不发送，并且使得两个或更多个不在同一冲突内的电缆调制解调器 组可以在相同的时间帧内传输。

公开(公告)号：US20150295684A1

公开(公告)日：2015-10-15

申请号：US14685422

申请日：2015-04-13

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Hang Jin ,  Tong Liu ,  Pawel Piotr Sowinski

IPC: H04L5/00 ,  H04L27/34

CPC classification number: H04L5/0007 ,  H04B3/542 ,  H04J3/0667 ,  H04J3/0673 ,  H04L5/006 ,  H04L12/2801 ,  H04L27/2697 ,  H04L27/3405 ,  H04L27/345 ,  H04L47/12 ,  H04L47/27

Abstract: An example method for determining and managing upstream profiles in Data Over Cable Service Interface Specification (DOCSIS) 3.1 network environments is provided and includes determining, at a Converged Cable Access Platform (CCAP) core, channel conditions independent of any channel effect over a hybrid fiber coaxial (HFC) network between a remote physical layer (R-PHY) entity coupled to the CCAP core and a cable modem (CM) in the DOCSIS 3.1 network environment, and assigning an upstream profile to the CM based on the channel conditions. In specific embodiments, the channel conditions include signal to noise ratio (SNR), modulation error ratio (MER) or group delay. In some embodiments, assigning the upstream profile includes determining a quadrature amplitude modulation (QAM) order based on the SNR or MER, and determining a pilot pattern based on the group delay, the combination of the QAM order and the pilot pattern identifying the upstream profile.

Abstract translation: 提供了一种用于确定和管理数据有线服务接口规范（DOCSIS）3.1网络环境中的上行配置文件的示例方法，包括在融合电缆接入平台（CCAP）核心处确定与混合光纤无关的任何信道效应的信道条件 在耦合到CCAP核心的远程物理层（R-PHY）实体和DOCSIS 3.1网络环境中的电缆调制解调器（CM）之间的同轴（HFC）网络，以及基于信道条件向CM分配上行简档。 在具体实施例中，信道条件包括信噪比（SNR），调制误差比（MER）或组延迟。 在一些实施例中，分配上行简档包括基于SNR或MER确定正交幅度调制（QAM）顺序，以及基于组延迟确定导频模式，QAM顺序和识别上游简档的导频模式的组合 。

公开(公告)号：US20150295669A1

公开(公告)日：2015-10-15

申请号：US14685403

申请日：2015-04-13

Applicant: CISCO TECHNOLOGY, INC.

Inventor： John T. Chapman ,  Yi Tang ,  Lin Su ,  Tong Liu ,  Hang Jin

IPC: H04J3/06

CPC classification number: H04L5/0007 ,  H04B3/542 ,  H04J3/0667 ,  H04J3/0673 ,  H04L5/006 ,  H04L12/2801 ,  H04L27/2697 ,  H04L27/3405 ,  H04L27/345 ,  H04L47/12 ,  H04L47/27

Abstract: An example method for managing time offset and frequency drift in asynchronous Data Over Cable Service Interface Specification (DOCSIS) Remote Physical layer (R-PHY) network environments is provided and includes receiving, at a first hardware device, time synchronization message from a remote second hardware device in the DOCSIS R-PHY network, determining a time difference between a first clock at the first hardware device and a second clock at the second hardware device from the time synchronization message; and re-stamping an event message based on the time difference.

Abstract translation: 提供了用于在异步数据有线服务接口规范（DOCSIS）远程物理层（R-PHY）网络环境中管理时间偏移和频率漂移的示例性方法，包括在第一硬件设备处接收来自远程秒的时间同步消息 DOCSIS R-PHY网络中的硬件设备，从时间同步消息确定第一硬件设备的第一时钟与第二硬件设备的第二时钟之间的时间差; 并根据时差重新标记事件消息。