公开(公告)号：US20180294837A1

公开(公告)日：2018-10-11

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

CPC classification number: H04B3/46 ,  H04B1/38 ,  H04B17/345 ,  H04J11/003 ,  H04L1/0071 ,  H04L5/00 ,  H04L5/0073 ,  H04L5/14 ,  H04L12/2801 ,  H04L12/2885

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：US20180184337A1

公开(公告)日：2018-06-28

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

CPC classification number: H04W36/0016 ,  H04B3/23 ,  H04L12/2863 ,  H04W36/04

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：US09912464B2

公开(公告)日：2018-03-06

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 ,  H04L12/28

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.

公开(公告)号：US20170310562A1

公开(公告)日：2017-10-26

申请号：US15372259

申请日：2016-12-07

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Hang Jin

IPC: H04L12/24 ,  H04L29/08 ,  H04B3/46 ,  H04L12/26 ,  H04L12/64

CPC classification number: H04L41/5025 ,  H04B3/46 ,  H04L41/0677 ,  H04L41/147 ,  H04L41/16 ,  H04L41/22 ,  H04L41/5009 ,  H04L43/10 ,  H04L43/12 ,  H04L67/1097 ,  H04L2012/6421

Abstract: An example system for Predictive Services Management (PSM) in cable network environments is provided and includes a data collector located in a cable network that captures multi-tone signals traversing the cable network, a data repository located in a cloud network, and a central server having PSM algorithms configured for: retrieving key performance indicators from the multi-tone signals; identifying a fault signature based on the key performance indicators, the fault signature being identified based on phase domain analysis of a channel response; accessing the data repository for geographical information; determining a location of a fault in the cable network based on the fault signature and the geographical information; accessing the data repository for device information; determining a type of fault based on the location of the fault and the device information; and activating repair and maintenance activities based on the type of fault, location of the fault and the fault signature.

公开(公告)号：US20160072578A1

公开(公告)日：2016-03-10

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: H04B10/079 ,  H04L12/26 ,  H04J3/16

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：US20150110227A1

公开(公告)日：2015-04-23

申请号：US14056300

申请日：2013-10-17

Applicant: Cisco Technology, Inc.

Inventor： Hang Jin ,  Koen Van Renterghem ,  Richard Meller ,  Denis Downey

IPC: H04L1/00 ,  H04L1/20

CPC classification number: H04L1/0054 ,  H04B1/1027 ,  H04L1/0045 ,  H04L1/0057 ,  H04L25/022 ,  H04L25/067

Abstract: Presented herein are pilot-less noise estimation techniques that utilize a correlation between attributes of a received signal and the noise to generate signal-to-noise ratio (SNR) estimate for the signal. More specifically, an interval of a digital signal is received a log-likelihood ratio (LLR) value is calculated for a plurality of bits in the interval of the signal. A scalar value that relates to a distribution of the calculated LLR values is computed. The SNR for the interval of the signal is determined based on a predetermined correlation between the scalar value and noise within the received interval of the signal.

Abstract translation: 这里呈现的是无干扰噪声估计技术，其利用接收信号的属性与噪声之间的相关性来生成信号的信噪比（SNR）估计。 更具体地，接收数字信号的间隔，对信号的间隔中的多个位计算对数似然比（LLR）值。 计算与计算的LLR值的分布有关的标量值。 基于信号的接收间隔内的标量值和噪声之间的预定相关性来确定信号间隔的SNR。

公开(公告)号：US11239985B2

公开(公告)日：2022-02-01

申请号：US16385920

申请日：2019-04-16

Applicant: Cisco Technology, Inc.

Inventor： Hang Jin ,  John T. Chapman

IPC: H04L5/14 ,  H04L12/64 ,  H04B10/2575 ,  H04B10/25

Abstract: Echo cancellation in multiple port Full Duplex (FDX) nodes and amplifiers may be provided. First, a plurality of signals may be provided to a cancelation device. Each of the plurality of signals may be configured to provide the cancelation device with a corresponding plurality of configurations. Next, a plurality of effective echo power values respectively corresponding to the plurality of configurations may be received. A one of the plurality of configurations corresponding to a lowest of the plurality of effective echo power values may then be selected. The cancelation device may then be operated at the selected one of the plurality of configurations.

公开(公告)号：US10911210B2

公开(公告)日：2021-02-02

申请号：US16258196

申请日：2019-01-25

Applicant: Cisco Technology, Inc.

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

IPC: H04L5/14 ,  H04L12/803 ,  H04L12/819 ,  H04L12/28

Abstract: A system to support Time Division Duplex (TDD) Full Duplex (FDX) with a remote Duty Cycle (DS) framer may be provided. The system may comprise a core and a Remote PHY Device (RPD). The core may comprise a Downstream (DS) Quality-of-Service (QoS) scheduler and a DS duty cycle rate regulator. The DS duty cycle rate regulator may comprise a plurality of token buckets and a plurality of data framing queues. The RPD may comprise a plurality of TG queue blocks and switching logic.

公开(公告)号：US20200336280A1

公开(公告)日：2020-10-22

申请号：US16385920

申请日：2019-04-16

Applicant: Cisco Technology, Inc.

Inventor： Hang Jin ,  John T. Chapman

IPC: H04L5/14 ,  H04B10/25 ,  H04B10/2575 ,  H04L12/64

Abstract: Echo cancellation in multiple port Full Duplex (FDX) nodes and amplifiers may be provided. First, a plurality of signals may be provided to a cancelation device. Each of the plurality of signals may be configured to provide the cancelation device with a corresponding plurality of configurations. Next, a plurality of effective echo power values respectively corresponding to the plurality of configurations may be received. A one of the plurality of configurations corresponding to a lowest of the plurality of effective echo power values may then be selected. The cancelation device may then be operated at the selected one of the plurality of configurations.

公开(公告)号：US20200313721A1

公开(公告)日：2020-10-01

申请号：US16362930

申请日：2019-03-25

Applicant: Cisco Technology, Inc.

Inventor： Hang Jin

IPC: H04B3/20 ,  H04B10/2507 ,  H04L12/28

Abstract: Upstream (US) funneling noise suppression may be provided. First, a signal comprising a plurality of mini-slots in a two dimensional time frequency space may be received by a funneling noise suppressor. Next, the power level in each of the plurality of mini-slots may be determined. The received signal may then be outputted. Outputting the received signal may comprises outputting the received signal with mini-slots muted in the received signal that have a power level less than a predetermined threshold.