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：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：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。