公开(公告)号：US20040022307A1

公开(公告)日：2004-02-05

申请号：US10208045

申请日：2002-07-31

Applicant: Broadcom Corporation

Inventor： Mark Dale ,  Dorothy Lin ,  Jen-chieh Chien ,  Alan Gin ,  Rocco J. Brescia JR. ,  Alan Kwentus ,  David L. Hartman ,  Joyce Wang

IPC: H04N007/20 ,  H04N007/173 ,  H04B001/38 ,  H04L005/16

CPC classification number: H04L1/0057 ,  H04L1/004 ,  H04L1/0065 ,  H04L1/0066 ,  H04L25/03343 ,  H04L27/34 ,  H04L2025/0342

Abstract: Methods and systems for modifying DOCSIS-based transmission paths for communication in higher frequency and/or wireless environments, such as wireless terrestrial communication systems and satellite communication systems. An inner turbo-code is combined with a DOCSIS based Reed-Solomon (nullRSnull) forward error correction (nullFECnull) coding scheme, to produce a concatenated turbo-RS code (other FEC codes can be utilized). In phase and quadrature phase (nullI-Qnull) processing is utilized to enable relatively low cost up-converter implementations. The I-Q processing is preferably performed at baseband, essentially pre-compensating for analog variations in the transmit path. Power amplifier on/off control capable of controlling on/off RF power control of remote transmitters is modulated on a transmit cable to reduce the need for a separate cable.

Abstract translation: 用于修改在诸如无线地面通信系统和卫星通信系统的较高频率和/或无线环境中进行通信的基于DOCSIS的传输路径的方法和系统。 内部turbo码与基于DOCSIS的Reed-Solomon（“RS”）前向纠错（“FEC”）编码方案组合，以产生级联的turbo-RS码（可以利用其他FEC码）。 使用同相和正交相位（“I-Q”）处理来实现相对低成本的上变频器实现。 优选地，在基带处执行I-Q处理，基本上对发送路径中的模拟变化进行预补偿。 功率放大器开/关控制能够控制远程发射机的开/关射频功率控制在发射电缆上进行调制，以减少对单独电缆的需要。

公开(公告)号：US20030176161A1

公开(公告)日：2003-09-18

申请号：US10097942

申请日：2002-03-15

Applicant: Broadcom Corporation

Inventor： Mark Dale ,  David Hartman ,  Anders Hebsgaard

IPC: H04H001/00

CPC classification number: H04J3/04 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L27/2604

Abstract: A downstream adaptive modulation system and method. The downstream adaptive modulation system comprises a wireless access termination system and one or more wireless modems. The wireless access termination system includes a plurality of queues and a parser. The parser parses data traffic onto the plurality of queues. Each queue is associated with a different coding and modulation scheme. Each of the one or more wireless modems receives data traffic from the plurality of queues based on the wireless modem's ability to demodulate and decode the signal from each of the plurality of queues. When a wireless modem experiences a change in signal strength, the present invention enables the wireless modem to adapt to data from other queues to compensate for the change in signal strength. Thus, if the signal strength improves over a period of time, the wireless modem may receive data at a higher order modulation and FEC code rate. If the signal strength weakens over a period of time, the wireless modem may receive data at a lower order modulation and FEC code rate.

Abstract translation: 一种下行自适应调制系统及方法。 下行自适应调制系统包括无线接入终端系统和一个或多个无线调制解调器。 无线接入终端系统包括多个队列和解析器。 解析器将数据流量分析到多个队列上。 每个队列与不同的编码和调制方案相关联。 一个或多个无线调制解调器中的每一个基于无线调制解调器解调和解码来自多个队列中的每一个的信号的能力，从多个队列中接收数据业务。 当无线调制解调器经历信号强度的变化时，本发明使得无线调制解调器能够适应来自其他队列的数据以补偿信号强度的变化。 因此，如果信号强度在一段时间内改善，则无线调制解调器可以以较高阶调制和FEC码率接收数据。 如果信号强度在一段时间内衰减，则无线调制解调器可以以较低阶调制和FEC码率接收数据。

公开(公告)号：US20040017830A1

公开(公告)日：2004-01-29

申请号：US10420805

申请日：2003-04-23

Applicant: Broadcom Corporation

Inventor： Mark Dale ,  David Hartman ,  Dorothy Lin ,  Rocco Brescia ,  Alan Gin ,  Ravi Bhaskaran ,  Jen-chieh Chien ,  Adel Fanous

IPC: H04J003/16

CPC classification number: H04W28/18 ,  H04B7/18582 ,  H04W4/06 ,  H04W48/08 ,  H04W84/06

Abstract: A method, apparatus and computer program product for generating and processing upstream channel descriptor (UCD) messages in a DOCSIS-based broadband communications system, such as a DOCSIS-based two-way satellite communications system, is provided. A satellite modem termination system (SMTS) generates a UCD message that includes one or more standard parameters pertaining to an upstream channel of the two-way satellite communications system, wherein the one or more standard parameters are defined in accordance with the DOCSIS protocol, and one or more satellite application-specific parameters pertaining to the upstream channel, wherein the one or more satellite application specific parameters are not provided for by the DOCSIS protocol. The UCD message is transmitted to a satellite modem that extracts both the standard and satellite application-specific parameters for use in managing communication over the upstream channel.

Abstract translation: 提供了一种用于在基于DOCSIS的宽带通信系统（例如基于DOCSIS的双向卫星通信系统）中生成和处理上行信道描述符（UCD）消息的方法，装置和计算机程序产品。 卫星调制解调器终端系统（SMTS）生成包括与双向卫星通信系统的上行信道相关的一个或多个标准参数的UCD消息，其中一个或多个标准参数根据DOCSIS协议来定义，以及 与上游信道相关的一个或多个卫星应用特定参数，其中DOCSIS协议不提供一个或多个卫星应用特定参数。 UCD消息被发送到卫星调制解调器，其提取用于管理在上行信道上的通信的标准和卫星专用参数。

公开(公告)号：US20040162020A1

公开(公告)日：2004-08-19

申请号：US10420905

申请日：2003-04-23

Applicant: Broadcom Corporation

Inventor： Mark Dale ,  Dorothy D. Lin ,  Alan Gin ,  Jen-Chieh Chien ,  David Hartman ,  Rocco J. Brescia JR. ,  Ravi C. Bhaskaran ,  Adel F. Fanous

IPC: H04B007/185

CPC classification number: H04B7/18582

Abstract: A system and method for requesting additional bandwidth in a communications channel between one or more first satellite terminal devices and a second satellite terminal device, are provided. The method includes identifying an available field in a header to be transmitted from the one or more first devices to the second device and allocating at least a portion of the available field for requesting the additional bandwidth. A size of the available field is reconfigurable. The method also includes forwarding the extend header to the second device.

Abstract translation: 提供了一种用于在一个或多个第一卫星终端设备和第二卫星终端设备之间的通信信道中请求附加带宽的系统和方法。 该方法包括标识要从一个或多个第一设备发送到第二设备的报头中的可用字段，并且分配用于请求附加带宽的可用字段的至少一部分。 可用字段的大小是可重新配置的。 该方法还包括将扩展头转发到第二设备。

公开(公告)号：US20030199248A1

公开(公告)日：2003-10-23

申请号：US10420909

申请日：2003-04-23

Applicant: Broadcom Corporation

Inventor： Mark Dale ,  David Hartman ,  Dorothy Lin ,  Rocco Brescia ,  Alan Gin ,  Ravi Bhaskaran ,  Jen-chieh Chien ,  Adel Fanous

IPC: H04B007/185

CPC classification number: H04B7/18523

Abstract: Satellite communications are carried out using the Data Over Cable Interface Specification (DOCSIS). Satellite modems are notified of upstream channel congestion by inserting a congestion notification message in a medium access protocol (MAP) message for the upstream channel. Specifically, the congestion notification message is inserted in an unused field of the MAP message, such as the explicit congestion notification (ECN) field. The MAP message can also carry other characteristics of the upstream channel, including priority threshold, multicast access burst availability, and available bandwidth.

公开(公告)号：US20030078021A1

公开(公告)日：2003-04-24

申请号：US09978719

申请日：2001-10-18

Applicant: Broadcom Corporation

Inventor： Mark Dale

IPC: H04B001/06

CPC classification number: H03D7/161 ,  H03J7/04

Abstract: A transceiver includes a Downstream Signal Processor (DSP), an Upstream Signal Processor (USP), a Local Oscillator (LO), a differencer, a reference signal generator, and an estimator. The DSP receives an initial downstream signal, a downstream LO signal from the LO, and from the estimator a frequency-offset estimate indicative of a free-running frequency offset included in the initial downstream signal. The DSP uses the LO signal and the estimate to frequency down-convert the initial downstream signal, and also to remove the frequency offset from the initial downstream signal, thereby producing a corrected downstream signal. The USP uses both an upstream LO signal from the LO and the estimate to frequency convert an initial upstream signal so as to produce a frequency pre-corrected upstream signal.

Abstract translation: 收发器包括下行信号处理器（DSP），上行信号处理器（USP），本地振荡器（LO），差分器，参考信号发生器和估计器。 DSP从LO接收初始下行信号，下行LO信号，并从估计器接收指示包含在初始下行信号中的自由运行频率偏移的频率偏移估计。 DSP使用LO信号和估计来对初始下行信号进行下变频，并且从初始下行信号中去除频率偏移，从而产生校正的下行信号。 USP使用来自LO的上游LO信号和估计来对初始上行信号进行频率转换，以产生频率预校正的上行信号。