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1. 发明授权

US07146630B2 Broadband system with intelligent network devices 有权
公开(公告)号：US07146630B2
公开(公告)日：2006-12-05
申请号：US09952374
申请日：2001-09-13
申请人： Subrahmanyam Dravida , Prasad Dorbala , Dev V. Gupta , Satya V. Gupta
发明人： Subrahmanyam Dravida , Prasad Dorbala , Dev V. Gupta , Satya V. Gupta
IPC分类号： H04N7/173 , H04N7/16
CPC分类号： H04L61/2015 , H04L12/2801 , H04L12/2856 , H04L12/2859 , H04L12/2874 , H04L12/2876 , H04L12/4641 , H04L29/12216 , H04L41/12 , H04L41/5003 , H04L41/5022 , H04L41/5054 , H04L41/5087 , H04L41/509 , H04L47/10 , H04L47/15 , H04L47/20 , H04L47/24 , H04L47/2416 , H04L47/2425 , H04L47/2433 , H04L47/2441 , H04L47/2491 , H04L47/32 , H04L47/70 , H04L47/724 , H04L47/788 , H04L47/801 , H04L47/805 , H04L47/822 , H04L47/829 , H04L69/40 , H04L2012/5605 , H04L2012/5606 , H04L2012/561 , H04L2012/5651 , H04L2012/5679 , H04N7/10 , H04N7/17309 , H04N21/6118 , H04N21/6168 , H04Q3/0045
摘要： Hybrid fiber/coax networks employ the existing cable plant used for cable TV and transmit data signals in a frequency bandwidth above that which is used for cable TV. As this cable plant was deployed in a tree and branch topology, data transmissions may be susceptible to noise, variable transmission loss and frequency dispersion, particularly in the upstream direction. Further, due to the tree and branch topology, homes at the far end of the network experience much greater loss than do the homes that are near to the headend/ONU. The present system, which uses point-to-point data links between intelligent network elements located in the feeder/distribution network to provide reliable, secure, bi-directional broadband access. Digital signals are terminated at the intelligent network elements, switched and regenerated for transmission across additional upstream or downstream data links as needed to connect a home to a headend or router. The intelligent network elements can be co-located with or replace the standard network elements to take advantage of existing network configurations. The standard network elements can be selectively replaced by the intelligent network elements in an incremental approach. In this manner, the data links are made over relatively short runs of coax cable, which can provide greater bandwidth than the typical end-to-end feeder/distribution connection between a home and the headend or optical network unit.

2. 发明申请

US20030100283A1 Frequency acquisition and locking detection circuit for phase lock loop 审中-公开
标题翻译：用于锁相环的频率采集和锁定检测电路
公开(公告)号：US20030100283A1
公开(公告)日：2003-05-29
申请号：US10010063
申请日：2001-11-13
申请人： Narad Networks, Inc.
发明人： Miaochen Wu , Xiangdong Zhang , Angelos Alexanian , Wei Ye
IPC分类号： H04B001/06
CPC分类号： H04L12/2801 , H03J7/20 , H03L7/095 , H03L7/12 , H04L27/3827 , H04L2027/0028 , H04L2027/0057 , H04L2027/0073
摘要： A method and apparatus for providing frequency acquisition and locking detection for a phase lock loop is disclosed. The phase lock loop locks a receiver local oscillator to the frequency and phase of an RF carrier to allow data to be recovered from the RF carrier in the receiver. An analog mixer in the phase lock loop compares the frequency and phase of a receive LO output by a voltage controlled oscillator in the phase lock loop and the received RF carrier. A locking indicator dependent on the result of the comparison indicates whether the phase lock loop is locked. The locking indicator is coupled to a comparator. The comparator generates a pulse to close a switch in order to inject a periodic sweeping signal generated by a free running multi vibrator into the phase lock loop to push the receiver LO into the locking range.
摘要翻译：公开了一种用于为锁相环提供频率采集和锁定检测的方法和装置。锁相环将接收器本地振荡器锁定到RF载波的频率和相位，以允许从接收机中的RF载波恢复数据。锁相环中的模拟混频器通过锁相环中的压控振荡器和接收的RF载波来比较接收LO输出的频率和相位。取决于比较结果的锁定指示灯指示锁相环是否锁定。锁定指示器耦合到比较器。比较器产生脉冲以闭合开关，以便将由自由运行的多个振动器产生的周期性扫描信号注入到锁相环中，以将接收器LO推入锁定范围。

3. 发明申请

US20030091124A1 Slicer circuit with ping pong scheme for data communication 审中-公开
标题翻译：切片电路采用乒乓方案进行数据通信
公开(公告)号：US20030091124A1
公开(公告)日：2003-05-15
申请号：US10012681
申请日：2001-11-13
申请人： Narad Networks, Inc.
发明人： Dev Vrat Gupta , Miaochen Wu , Xiangdong Zhang , Wei Ye
IPC分类号： H03K009/00 , H04L027/06
CPC分类号： H04L27/38
摘要： A ping-pong scheme is used to slow down data transfer speed between an analog slicer in a receiver and a digital physical layer device, while maintaining the same data throughout. Two edges of a clock are used to slice the incoming analog signal, convert the analog signal to a digital signal and latch the converted signal. A ping-pong data pipeline is provided from the analog slicer to the physical layer device.
摘要翻译：乒乓方案用于降低接收机中的模拟限幅器与数字物理层设备之间的数据传输速度，同时保持相同的数据。时钟的两个边缘用于切片输入的模拟信号，将模拟信号转换为数字信号并锁存转换后的信号。从模拟切片器到物理层设备提供乒乓数据流水线。

4. 发明申请

US20020199205A1 Method and apparatus for delivering consumer entertainment services using virtual devices accessed over a high-speed quality-of-service-enabled communications network 审中-公开
标题翻译：使用通过高速服务质量启用的通信网络访问的虚拟设备来提供消费者娱乐服务的方法和装置
公开(公告)号：US20020199205A1
公开(公告)日：2002-12-26
申请号：US10180950
申请日：2002-06-25
申请人： Narad Networks, Inc
发明人： Nitin Sonawane , Vikram Saksena
IPC分类号： H04N007/173 , H04N007/16 , H04L012/28 , H04L012/56
CPC分类号： H04N21/47202 , H04N7/17318 , H04N7/17336 , H04N21/2381 , H04N21/2543 , H04N21/2747 , H04N21/4147 , H04N21/4381 , H04N21/4622 , H04N21/4782 , H04N21/643 , H04N21/64322
摘要： A virtual storage adapter provides networked data storage to a data processing device for delivering consumer entertainment services using virtual devices accessed over a high-speed quality-of-service-enabled communications network. A data storage device emulation unit emulates the functionality of a data storage device (e.g., a DVD or a CD) and a network interface comprising an IP Small Computer System Interface (nulliSCSInull) compatible interface connects the data storage device emulation unit to an iSCSI storage gateway. The virtual storage adapter provides video on demand (nullVoDnull) services using a video on demand server comprising a video on demand portal for selection and an administration unit for billing. Personal video recorder services are also provided, including data expiration, capacity on demand, consolidated recording and community recording features.
摘要翻译：虚拟存储适配器向数据处理设备提供网络数据存储，以使用通过高速服务质量启用通信网络访问的虚拟设备来传送消费者娱乐服务。数据存储设备仿真单元模拟数据存储设备（例如，DVD或CD）的功能，并且包括IP小型计算机系统接口（“iSCSI”）兼容接口的网络接口将数据存储设备仿真单元连接到 iSCSI存储网关虚拟存储适配器使用包括用于选择的视频点播门户的视频点播服务器提供视频点播（“VoD”）服务和用于计费的管理单元。还提供个人录像机服务，包括数据到期，按需容量，综合记录和社区记录功能。

5. 发明申请

US20020105965A1 Broadband system having routing identification based switching 审中-公开
公开(公告)号：US20020105965A1
公开(公告)日：2002-08-08
申请号：US09952207
申请日：2001-09-13
申请人： Narad Networks, Inc.
发明人： Subrahmanyam Dravida , Dev V. Gupta , Sriram Narayan , Frederick Peralta , Kiran Rege , Manas Tandon
IPC分类号： H04L012/66
CPC分类号： H04L61/2015 , H04L12/2801 , H04L12/2856 , H04L12/2859 , H04L12/2876 , H04L29/12216 , H04L41/0806 , H04L41/12 , H04L41/5003 , H04L47/10 , H04L47/15 , H04L47/20 , H04L47/24 , H04L47/2416 , H04L47/2441 , H04L47/32 , H04L47/70 , H04L47/724 , H04L47/788 , H04L47/801 , H04L47/805 , H04L47/822 , H04L47/829 , H04N7/10 , H04N7/17309 , H04N21/6118 , H04N21/6168 , H04Q3/0045
摘要： Hybrid fiber/coax networks employ the existing cable plant used for cable TV and transmit data signals in a frequency bandwidth above that which is used for cable TV. As this cable plant was deployed in a tree and branch topology, data transmissions may be susceptible to noise, variable transmission loss and frequency dispersion, particularly in the upstream direction. Further, due to the tree and branch topology, homes at the far end of the network experience much greater loss than do the homes that are near to the headend/ONU. The present system uses point-to-point data links between intelligent network elements located in the feeder/distribution network to provide reliable, secure, bi-directional broadband access. Digital signals are terminated at the intelligent network elements, switched and regenerated for transmission across additional upstream or downstream data links as needed to connect a home to a headend or router. A method of communicating through the access network includes assigning a routing identification (RID) to each network element and receiving at a first network element a packet having a destination MAC address of one of the end user devices. Based on the destination MAC address of the end user device to which the particular second network element is connected, the RID of the particular second network element is inserted into the packet, to provide an augmented packet. The augmented packet is switched through at least one of the intermediate network elements to the second network element corresponding to the inserted RID. The inserted RID is removed from the received augmented packet at the second network element to provide a restored packet. The restored packet is sent to the end user device corresponding to the destination MAC address. Data links are made over relatively short runs of coax cable, which can provide greater bandwidth than the typical end-to-end feeder/distribution connection between a home and the headend or optical network unit.

6. 发明申请

US20020078464A1 Broadband system with intelligent network devices 有权
标题翻译：具有智能网络设备的宽带系统
公开(公告)号：US20020078464A1
公开(公告)日：2002-06-20
申请号：US09952374
申请日：2001-09-13
申请人： Narad Networks, Inc.
发明人： Sybrahmanyam Dravida , Prasad Dorbala , Dev V. Gupta , Satya V. Gupta
IPC分类号： H04N007/173
CPC分类号： H04L61/2015 , H04L12/2801 , H04L12/2856 , H04L12/2859 , H04L12/2874 , H04L12/2876 , H04L12/4641 , H04L29/12216 , H04L41/12 , H04L41/5003 , H04L41/5022 , H04L41/5054 , H04L41/5087 , H04L41/509 , H04L47/10 , H04L47/15 , H04L47/20 , H04L47/24 , H04L47/2416 , H04L47/2425 , H04L47/2433 , H04L47/2441 , H04L47/2491 , H04L47/32 , H04L47/70 , H04L47/724 , H04L47/788 , H04L47/801 , H04L47/805 , H04L47/822 , H04L47/829 , H04L69/40 , H04L2012/5605 , H04L2012/5606 , H04L2012/561 , H04L2012/5651 , H04L2012/5679 , H04N7/10 , H04N7/17309 , H04N21/6118 , H04N21/6168 , H04Q3/0045
摘要： Hybrid fiber/coax networks employ the existing cable plant used for cable TV and transmit data signals in a frequency bandwidth above that which is used for cable TV. As this cable plant was deployed in a tree and branch topology, data transmissions may be susceptible to noise, variable transmission loss and frequency dispersion, particularly in the upstream direction. Further, due to the tree and branch topology, homes at the far end of the network experience much greater loss than do the homes that are near to the headend/ONU. The present system, which uses point-to-point data links between intelligent network elements located in the feeder/distribution network to provide reliable, secure, bi-directional broadband access. Digital signals are terminated at the intelligent network elements, switched and regenerated for transmission across additional upstream or downstream data links as needed to connect a home to a headend or router. The intelligent network elements can be co-located with or replace the standard network elements to take advantage of existing network configurations. The standard network elements can be selectively replaced by the intelligent network elements in an incremental approach. In this manner, the data links are made over relatively short runs of coax cable, which can provide greater bandwidth than the typical end-to-end feeder/distribution connection between a home and the headend or optical network unit.
摘要翻译：混合光纤/同轴电缆网络采用用于有线电视的现有电缆设备，并以高于用于有线电视的频率带宽传输数据信号。由于该电缆厂部署在树型和分支拓扑结构中，数据传输可能会受到噪声，可变传输损耗和频率分散的影响，特别是在上行方向。此外，由于树和分支拓扑，网络远端的家庭比靠近头端/ ONU的家庭遭受更大的损失。该系统使用位于馈线/分配网络中的智能网络元件之间的点对点数据链路来提供可靠，安全的双向宽带接入。数字信号在智能网络元件处被终止，被切换和再生以用于在将家庭连接到头端或路由器所需的附加上游或下游数据链路上传输。智能网络元件可以与标准网络元件共同定位或替换，以利用现有的网络配置。标准网元可以以增量方式由智能网元选择性地替代。以这种方式，数据链路通过相对较短的同轴电缆运行进行，这可以提供比归属和前端或光网络单元之间的典型端到端馈线/分配连接更大的带宽。

7. 发明授权

US07072360B2 Network architecture for intelligent network elements 有权
标题翻译：智能网元的网络架构
公开(公告)号：US07072360B2
公开(公告)日：2006-07-04
申请号：US09952482
申请日：2001-09-13
申请人： Subrahmanyam Dravida , Dev V Gupta , Frederick Peralta , Kiran M Rege , Manas Tandon
发明人： Subrahmanyam Dravida , Dev V Gupta , Frederick Peralta , Kiran M Rege , Manas Tandon
IPC分类号： H04L12/28 , H04J1/00 , H04J3/16
CPC分类号： H04L61/2015 , H04L12/2801 , H04L12/2856 , H04L12/2859 , H04L12/2861 , H04L12/4641 , H04L12/4645 , H04L29/12216 , H04L41/0806 , H04L41/0886 , H04L41/12 , H04L41/5003 , H04L47/10 , H04L47/20 , H04L47/2416 , H04L47/2425 , H04L47/2433 , H04L47/2441 , H04L47/2491 , H04L47/32 , H04L2012/5605 , H04L2012/5606 , H04L2012/561 , H04L2012/5651 , H04L2012/5679 , H04N7/10 , H04N7/17309 , H04Q3/0045
摘要： Hybrid fiber/coax networks employ the existing cable plant used for cable TV and transmit data signals in a frequency bandwidth above that which is used for cable TV. The present system used point-to-point data links between intelligent network elements located in the feeder/distribution network to provide reliable, secure, bi-directional broadband access. Digital signals are terminated at the intelligent network elements, switched and regenerated for transmission across additional upstream or downstream data links as needed to connect a home to a headend or router. The intelligent network elements can be co-located with or replace the standard network elements. A tree-and-branch network architecture is therefore established in which each intelligent network element is assigned a routing ID employed in the point-to-point transmissions while leaving legacy analog signals unimpeded. In this manner, the data links are made over relatively short runs of coax cable, which can provide greater bandwidth.
摘要翻译：混合光纤/同轴电缆网络采用用于有线电视的现有电缆设备，并以高于用于有线电视的频率带宽传输数据信号。本系统使用位于馈线/分配网络中的智能网络元件之间的点对点数据链路，以提供可靠，安全，双向的宽带接入。数字信号在智能网络元件处被终止，被切换和再生以用于在将家庭连接到头端或路由器所需的附加上游或下游数据链路上传输。智能网络元件可以与标准网络元件共同定位或替换。因此，建立了一种树分支网络架构，其中每个智能网络元件被分配在点对点传输中采用的路由ID，同时保持传统模拟信号不受阻碍。以这种方式，数据链路通过较短的同轴电缆运行进行，这可以提供更大的带宽。

8. 发明申请

US20040014448A1 Adaptive correction of a received signal frequency response tilt 有权
标题翻译：接收信号频率响应倾斜的自适应校正
公开(公告)号：US20040014448A1
公开(公告)日：2004-01-22
申请号：US10197623
申请日：2002-07-16
申请人： Narad Networks, Inc.
发明人： Daniel B. Talbot
IPC分类号： H04L001/22 , H04B001/10 , H04B001/06 , H04B007/00
CPC分类号： H04L25/03159 , H04B17/354 , H04L2025/0342 , H04L2025/03522 , H04L2027/0057
摘要： Distortion due to transmission characteristics of a transmission medium is corrected by measuring leakage in a signal orthogonal to a received signal. The frequency response of an equalizer is adaptively adjusted until the measured leakage is at a local minimum.
摘要翻译：通过测量与接收信号正交的信号的泄漏来校正由于传输介质的传输特性引起的失真。自适应地调节均衡器的频率响应，直到测量的泄漏达到局部最小值。

9. 发明申请

US20020178252A1 Extensible service provisioning engine 审中-公开
标题翻译：可扩展服务供应引擎
公开(公告)号：US20020178252A1
公开(公告)日：2002-11-28
申请号：US10143728
申请日：2002-05-08
申请人： Narad Networks, Inc.
发明人： Srinivas Balabhadrapatruni , Prasad Dorbala , Satish L. Yellanki , Sunil K. Kotagiri , Srinivas Loke , Charles Bear , Ravi S. Kumar , Vikram Saksena
IPC分类号： G06F015/16 , G06F015/173
CPC分类号： H04L41/5054 , H04L41/22 , H04L41/5087 , H04L41/509
摘要： In a network system, services are provided to users via network interconnections from a service provider. Such services include data, voice, video, and others, and are typically implemented and/or initiated via an interconnection from a network node operated by the service provider to customer premises equipment (CPE) operable to receive the service. Service provisioning includes identifying the service to be provided, identifying the CPE to receive the service, and the determining the manner in which the service is to be provided. In an execution environment such as a hybrid fiber-coax (HFC) network, service deployment time and cost, and maintenance are reduced, and reliability increased, by an executable element generator operable to generate workflow definition files, such as an XML (Extensible Markup Language) script. A plurality of services are defined according to a workflow model, in which each of the services corresponds to one or more of the executable scripts. A service provisioning engine such as a workflow manager is operable to execute the executable scripts for providing the corresponding service via the network. The service provisioning engine reads the executable scripts from a common repository such as an LDAP directory, and provides or initiates the service by communicating, via the network, with the CPE.
摘要翻译：在网络系统中，通过来自服务提供商的网络互连向用户提供服务。这样的服务包括数据，语音，视频和其他，并且通常通过从由服务提供商操作的网络节点到可操作以接收服务的客户驻地设备（CPE）的互连来实施和/或启动。服务提供包括识别要提供的服务，识别用于接收服务的CPE，以及确定要提供服务的方式。在诸如混合光纤同轴（HFC）网络的执行环境中，通过可执行元件发生器可以减少服务部署时间和成本以及维护并提高可靠性，可执行元件发生器可用于生成工作流定义文件，例如XML（可扩展标记语言）脚本。根据工作流模型定义多个服务，其中每个服务对应于一个或多个可执行脚本。诸如工作流管理器之类的服务供应引擎可操作地执行用于经由网络提供对应服务的可执行脚本。服务提供引擎从诸如LDAP目录的公共存储库读取可执行脚本，并通过网络与CPE通信来提供或启动服务。

10. 发明申请

US20020138854A1 System and method for mapping end user identifiers to access device identifiers 有权
标题翻译：用于将最终用户标识符映射到访问设备标识符的系统和方法
公开(公告)号：US20020138854A1
公开(公告)日：2002-09-26
申请号：US09952480
申请日：2001-09-13
申请人： Narad Networks, Inc.
发明人： Gautam Desai , Subrahmanyam Dravida , Satya V. Gupta , Kiran M. Rege , Manas Tandon , Ravi S. Kumar , DeQuan Wu
IPC分类号： H04N007/16
CPC分类号： H04L61/2015 , H04L12/2801 , H04L12/2856 , H04L12/2859 , H04L12/4641 , H04L29/12216 , H04L41/0803 , H04L41/0886 , H04L41/12 , H04L41/5003 , H04L43/12 , H04L47/10 , H04L47/15 , H04L47/20 , H04L47/215 , H04L47/24 , H04L47/2416 , H04L47/2425 , H04L47/2433 , H04L47/2441 , H04L47/2491 , H04L47/32 , H04L47/50 , H04L47/521 , H04L47/6225 , H04L47/623 , H04L47/70 , H04L47/724 , H04L47/788 , H04L47/801 , H04L47/805 , H04L47/822 , H04L47/829 , H04L2012/5605 , H04L2012/5606 , H04L2012/561 , H04L2012/5651 , H04L2012/5679 , H04N7/10 , H04N7/17309 , H04N21/6118 , H04N21/6168 , H04N21/6402 , H04Q3/0045
摘要： Hybrid fiber/coax networks employ the existing cable plant used for cable TV and transmit data signals in a frequency bandwidth above that which is used for cable TV. As this cable plant was deployed in a tree and branch topology, data transmissions may be susceptible to noise, variable transmission loss and frequency dispersion, particularly in the upstream direction. Further, due to the tree and branch topology, homes at the far end of the network experience much greater loss than do the homes that are near to the headend/ONU. The present system, which uses point-to-point data links between intelligent network elements located in the feeder/distribution network to provide reliable, secure, bi-directional broadband access. Digital signals, or messages, are terminated at the intelligent network elements, switched and regenerated for transmission across additional upstream or downstream data links as needed to connect a home to a headend or router. Messages indicative of an end user routing ID (RID) are identified and the information extracted for user with successive messages. In this manner, the data links are made over relatively short runs of coax cable, which can provide greater bandwidth than the typical end-to-end feeder/distribution connection between a home and the headend or optical network unit.
摘要翻译：混合光纤/同轴电缆网络采用用于有线电视的现有电缆设备，并以高于用于有线电视的频率带宽传输数据信号。由于该电缆厂部署在树型和分支拓扑结构中，数据传输可能会受到噪声，可变传输损耗和频率分散的影响，特别是在上行方向。此外，由于树和分支拓扑，网络远端的家庭比靠近头端/ ONU的家庭遭受更大的损失。该系统使用位于馈线/分配网络中的智能网络元件之间的点对点数据链路来提供可靠，安全的双向宽带接入。数字信号或消息在智能网络元件处被终止，被切换和重新生成，以便在将家庭连接到头端或路由器所需的附加上游或下游数据链路上传输。识别指示最终用户路由ID（RID）的消息，并且为具有连续消息的用户提取信息。以这种方式，数据链路通过相对较短的同轴电缆运行进行，这可以提供比归属和前端或光网络单元之间的典型端到端馈线/分配连接更大的带宽。

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