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1. 发明申请

US20130266049A1 INTELLIGENT NODE FOR IMPROVING SIGNAL QUALITY IN A CABLE MODEM NETWORK 有权
标题翻译：用于在电缆调制解调器网络中提高信号质量的智能节点
公开(公告)号：US20130266049A1
公开(公告)日：2013-10-10
申请号：US13526284
申请日：2012-06-18
申请人： David B. FOX , Douglas K. Rosich , Weidong Chen , Jerry Guo
发明人： David B. FOX , Douglas K. Rosich , Weidong Chen , Jerry Guo
IPC分类号： H04B1/38 , H04B15/00
CPC分类号： H04L12/2885 , H04L69/04
摘要： Systems and methods are provided for improving the signal quality and performance in a cable operator's Hybrid Fiber Coax (HFC) plant by adding DOCSIS intelligence to components within the HFC plant. These intelligent DOCSIS devices, referred to here as DOCSIS Intelligent Nodes (DINs), intercept the upstream signal from cable modems and set top boxes, and perform various types of signal processing on the signals based upon knowledge of the signal characteristics obtained from CMTS control structures such as MAPs and Upstream Channel Descriptors (UCDs). The DIN functionality can be integrated into any type of device found in HFC networks such as RF amplifiers and fiber nodes.
摘要翻译：提供系统和方法，通过向HFC工厂内的组件添加DOCSIS智能，提高电缆运营商的混合光纤同轴电缆（HFC）工厂的信号质量和性能。这些智能DOCSIS设备（这里称为DOCSIS智能节点（DIN））拦截来自电缆调制解调器和机顶盒的上行信号，并且基于从CMTS控制结构获得的信号特性的知识对信号执行各种类型的信号处理例如MAP和上行信道描述符（UCD）。 DIN功能可以集成到HFC网络中的任何类型的设备中，如RF放大器和光纤节点。

2. 发明授权

US08306166B1 System and method for detecting burst noise during quadrature amplitude modulation communications 有权
标题翻译：用于在正交调幅通信期间检测脉冲串噪声的系统和方法
公开(公告)号：US08306166B1
公开(公告)日：2012-11-06
申请号：US13351699
申请日：2012-01-17
申请人： David Fox
发明人： David Fox
IPC分类号： H03D1/06
CPC分类号： H04L27/38
摘要： A system and method for detecting burst noise during quadrature amplitude modulation (QAM) communications are provided. A QAM signal is acquired at a receiver in communication with a network. The QAM signal is demodulated at the receiver to identify a plurality of symbols. Amplitudes for each of the plurality of symbols are determined, and are compared to a predetermined threshold. For each amplitude that is greater than the predetermined threshold, information is recorded at the receiver relating to a burst noise event. The magnitude of the burst noise can be determined by measuring a difference between a received constellation point and a perimeter constellation point closest to the received constellation point. The information about the burst noise event can be transmitted to an error correction module for reducing future burst noise in the network. Equalizer coefficients and tracking loop performance can be adjusted/enhanced using the burst noise information.
摘要翻译：提供了用于在正交幅度调制（QAM）通信期间检测突发噪声的系统和方法。在与网络通信的接收机处获取QAM信号。在接收机处解调QAM信号以识别多个符号。确定多个符号中的每一个的幅度，并将其与预定阈值进行比较。对于大于预定阈值的每个幅度，信息被记录在与突发噪声事件有关的接收机处。可以通过测量接收到的星座点与最接近的星座点的周边星座点之间的差异来确定突发噪声的幅度。关于突发噪声事件的信息可以被发送到纠错模块，以减少网络中未来的突发噪声。可以使用突发噪声信息来调整/增强均衡器系数和跟踪环路性能。

3. 发明授权

US11606699B2 Scalable evolved packet core 有权
公开(公告)号：US11606699B2
公开(公告)日：2023-03-14
申请号：US17222365
申请日：2021-04-05
申请人： Casa Systems, Inc.
发明人： Wenxing Zheng , Gibson Ang
IPC分类号： H04W16/02 , G06F9/455 , G06F9/50 , H04W84/04
摘要： The techniques described herein relate to methods, apparatus, and computer readable media configured to provide a distributed core framework for a voice and data network. A control plane comprising a set of control plane components is executed using a set of virtual machines running on a set of computing devices. The control plane comprises a first network interface to the voice and data network that is shared by the set of control plane components. A data plane comprising a set of data plane components is executed using a set of virtual machines running on a set of computing devices. The data plane comprises a second network interface to the voice and data network that is shared by the set of data plane components. Upon receipt of a session request from a remote device, a selected data plane component is selected to handle a corresponding session, such that the selected data plane component can directly communicate with the remote device using the second network interface to handle the session.

4. 发明授权

US11218578B2 Methods and apparatus for recovering network association information 有权
公开(公告)号：US11218578B2
公开(公告)日：2022-01-04
申请号：US16782978
申请日：2020-02-05
申请人： Casa Systems, Inc.
发明人： Shane Hooker , Bin Mo , Jacob Eipe , Gaurav Paliwal
IPC分类号： H04L29/08 , H04L29/06 , H04L5/00 , H04L12/801
摘要： The techniques described herein relate to methods, apparatus, and computer readable media configured to determine a current data transmission sequence number for a next packet in a communication session with a remote computing device. An interruption in the communication session is detected. Checkpointed data for the communication session is determined that is indicative of a previous sequence number used for a previous packet sent to the remote computing device. A resolution procedure is performed to determine the current data transmission sequence number for the next packet in the communication session, including determining an estimated next sequence number for transmitting data in the communication session based on the checkpointed data, transmitting a first packet to the remote computing device, receiving a second packet from the remote computing device that has an associated sequence number, and determining the current sequence number for the next packet in the communication session.

5. 发明申请

US20180263037A1 DYNAMIC SHARING OF OFDMA AND ATDMA SIGNALS 审中-公开
公开(公告)号：US20180263037A1
公开(公告)日：2018-09-13
申请号：US15728916
申请日：2017-10-10
申请人： Casa Systems, Inc.
发明人： Tao Yu , Douglas Keith Rosich , Weidong Chen
IPC分类号： H04W72/04 , H04L27/00 , H04J4/00 , H04L27/156 , H04L5/00
CPC分类号： H04W72/0453 , H04B7/2615 , H04J4/00 , H04L5/0007 , H04L25/02 , H04L27/0008 , H04L27/0014 , H04L27/1563 , H04L27/26 , H04L27/38 , H04W72/0446
摘要： The techniques described herein relate to methods, apparatus, and computer readable media configured to decode modulated data. A modulated signal is received. A format of the modulated signal is determined, wherein the format can include a first format comprising a first type of modulated signal, or a second format comprising the first type of modulated signal and a second type of modulated signal that is different than the first type. The modulated signal is decoded by determining a frequency shift amount based on the format of the modulated signal, shifting a frequency band of the first type of modulated signal from an original position to a shifted position, thereby shifting a center frequency of the first type of modulated signal by the frequency shift amount, and filtering, based on the format of the modulated signal, signals outside of the frequency band of the shifted first type of modulated signal.

6. 发明申请

US20140185630A1 Systems And Methods For Performing Fiber Node Splits Using Remote QAM Modulation And Demodulation 审中-公开
标题翻译：使用远程QAM调制和解调执行光纤节点分割的系统和方法
公开(公告)号：US20140185630A1
公开(公告)日：2014-07-03
申请号：US13733486
申请日：2013-01-03
申请人： CASA SYSTEMS, INC.
发明人： David Fox , Weidong Chen , Jerry Guo , Douglas Rosich
IPC分类号： H04L29/08
CPC分类号： H04J14/08 , H04B10/27 , H04L27/34
摘要： Systems and methods are provided for performing fiber node splits in DOCSIS cable systems by performing remote modulation and/or demodulation in the fiber node. In the downstream direction, a high-speed digital fiber optic interface can be used to send data from the CMTS to the fiber node, which then modulates the data onto separate downstream interfaces for subsequent distribution of the downstream data to CMs and/or STBs. In the upstream direction, different upstream interfaces from the CMs and/or STBs may be demodulated into digital streams which can then be combined into a single, time division multiplexed digital stream that is transmitted to the CMTS. As such, the modulation and demodulation functions are performed remotely in the fiber node instead of at the CMTS. This allows the fiber portion of the network to use less-expensive, off-the-shelf networking technologies such as Ethernet, and allows for more data to be sent over the fiber network such that additional fibers and/or wavelengths are not required when performing a node split.
摘要翻译：提供了通过在光纤节点中执行远程调制和/或解调来在DOCSIS电缆系统中执行光纤节点分割的系统和方法。在下游方向，可以使用高速数字光纤接口将数据从CMTS发送到光纤节点，然后光纤节点将数据调制到单独的下游接口，以便随后将下行数据分配给CM和/或STB。在上游方向上，来自CM和/或STB的不同的上行接口可以被解调成数字流，然后可以将其组合成单个时分复用的数字流，该数据流被发送到CMTS。因此，调制和解调功能在光纤节点中而不是CMTS远程执行。这允许网络的光纤部分使用较便宜的现成的网络技术，例如以太网，并且允许通过光纤网络发送更多的数据，使得在执行时不需要额外的光纤和/或波长一个节点分裂。

7. 发明授权

US08670481B2 System and method for dynamic profile management in cable modem systems 有权
标题翻译：电缆调制解调器系统中动态配置文件管理的系统和方法
公开(公告)号：US08670481B2
公开(公告)日：2014-03-11
申请号：US13445258
申请日：2012-04-12
申请人： David Fox
发明人： David Fox
IPC分类号： H04B1/66 , H04B7/212 , H04J3/06
CPC分类号： H04L1/0003 , H04L1/0009
摘要： A system and method for dynamic profile management in a cable modem termination system (CMTS) is provided. A CMTS receiver is in communications with a plurality of cable modems, and a dynamic profile management module is in communication with the CMTS receiver. The dynamic profile management module establishes a communications profile for an upstream channel used by the CMTS receiver and at least one of the plurality of cable modems (the communications profile including a plurality of parameters associated with the upstream channel), continuously monitors performance metrics associated with communications across the upstream channel, and automatically adjusts the plurality of parameters of the communications profile in response to the monitored performance metrics.
摘要翻译：提供了一种用于电缆调制解调器终端系统（CMTS）中的动态配置文件管理的系统和方法。 CMTS接收机与多个电缆调制解调器通信，并且动态简档管理模块与CMTS接收器通信。动态简档管理模块建立由CMTS接收机使用的上行信道和至少一个电缆调制解调器（包括与上游信道相关联的多个参数的通信简档）中的至少一个的通信简档，连续地监视与跨越上游信道的通信，并且响应于监视的性能度量自动调整通信简档的多个参数。

8. 发明申请

US20220247523A1 METHODS AND APPARATUS FOR GENERATING AND USING DYNAMIC PROFILES FOR CABLE TRANSMISSION SYSTEMS 有权
公开(公告)号：US20220247523A1
公开(公告)日：2022-08-04
申请号：US17672811
申请日：2022-02-16
申请人： Casa Systems, Inc.
发明人： Hongbiao Zhang , Chain Lee , Yanbo Yuan , Tao Yu , Weidong Chen
IPC分类号： H04L5/00 , H04L5/02 , H04L27/26
摘要： The techniques described herein relate to methods, apparatus, and computer readable media configured to schedule individual orthogonal frequency-division multiple access (OFDMA) resources on an upstream channel to serve a data transmission request from a downstream device. A schedule for a set of available resources on the upstream channel to serve the data transmission request is generated, based on a dynamic bit loading profile, including generating data indicative of a first bit loading profile for a first set of resources from the set of available resources for a first burst, and data indicative of a second bit loading profile for a second set of resources from the set of available resources for a second burst. The schedule is transmitted to a downstream device, such that the downstream device is configured to encode the first burst using the first bit loading profile and the second burst using the second bit loading profile.

9. 发明授权

US11039320B2 Scalable evolved packet core 有权
公开(公告)号：US11039320B2
公开(公告)日：2021-06-15
申请号：US15932354
申请日：2018-02-16
申请人： Casa Systems, Inc.
发明人： Wenxing Zheng , Gibson Ang
IPC分类号： H04W16/02 , H04W28/08 , G06F9/455 , G06F9/50 , H04W84/04
摘要： The techniques described herein relate to methods, apparatus, and computer readable media configured to provide a distributed core framework for a voice and data network. A control plane comprising a set of control plane components is executed using a set of virtual machines running on a set of computing devices. The control plane comprises a first network interface to the voice and data network that is shared by the set of control plane components. A data plane comprising a set of data plane components is executed using a set of virtual machines running on a set of computing devices. The data plane comprises a second network interface to the voice and data network that is shared by the set of data plane components. Upon receipt of a session request from a remote device, a selected data plane component is selected to handle a corresponding session, such that the selected data plane component can directly communicate with the remote device using the second network interface to handle the session.

10. 发明授权

US09876531B2 System and method for reducing interference in OFDM channels 有权
公开(公告)号：US09876531B2
公开(公告)日：2018-01-23
申请号：US15189381
申请日：2016-06-22
申请人： Casa Systems, Inc.
发明人： Douglas Rosich , Weidong Chen , Tao Yu
IPC分类号： H04B3/32 , H04L27/26 , H04L12/28
CPC分类号： H04B3/32 , H04L12/2801 , H04L27/2649 , H04L27/2691
摘要： A system and method for signal processing in a cable modem termination system (CMTS) is provided. A CMTS receiver in communication with a plurality of cable modems at a upstream signal or a cable modem receiver in communication with the CMTS at a downstream signal. A plurality of Advanced Time Division Multiple Access (“ATDMA”) channel processors include a filter for recovering an ATDMA signal and a Orthogonal Frequency Division Multiplexing (“OFDM”) channel processor includes a filter for processing a combined OFDM and ATDMA signal. A summation module subtracts the ATDMA signal from the combined ATDMA and OFDM signal to obtain a clean OFDM signal.

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