公开(公告)号：US20030083054A1

公开(公告)日：2003-05-01

申请号：US10172777

申请日：2002-06-14

Applicant: BroadLogic Network Technologies, Inc.

Inventor： Anthony Francesca ,  WeiMin Zhang

IPC: H04M003/00

CPC classification number: H04L5/0005 ,  H04L5/0064 ,  H04L5/06 ,  H04L67/32 ,  H04L67/34 ,  H04L69/14 ,  H04N21/23412 ,  H04N21/2365 ,  H04N21/2383 ,  H04N21/2385 ,  H04N21/2402

Abstract: A system for managing bandwidth in a content distribution system is provided. The system can be incorporated into the content head end of the content distribution system. The system includes a program multiplexer, a multi-channel modulating module, a channel multiplexer, a digital-to-analog converter and a frequency block-up converter, all arranged in a sequential configuration. Packets representing respective content programs are fed to the program multiplexer. The program multiplexer multiplexes the packets into an output queue. How the packets are multiplexed by the program multiplexer into the output queue depends on the specific design and/or application. Packets from the output queue are then fed to the multi-channel modulating module. The multi-channel modulating module receives the packets and routes them to various modulators representing corresponding RF channels. The various modulators then modulate the respective packets to generate corresponding RF signals. These RF signals are then multiplexed by the channel multiplexer into a multi-channel RF signal. The multi-channel RF signal is then forwarded to the digital-to-analog converter for conversion into an analog, multi-channel RF signal. The frequency block-up converter then takes the analog multi-channel RF signal and shifts its to a higher frequency band for transmission. The shifted analog multi-channel RF signal is then transmitted over a medium to one or more customer premises equipment.

Abstract translation: 提供了一种用于管理内容分发系统中的带宽的系统。 该系统可以并入到内容分发系统的内容头端。 该系统包括程序多路复用器，多通道调制模块，通道多路复用器，数模转换器和频率块转换器，全部以顺序配置排列。 表示各个内容节目的分组被馈送到节目多路复用器。 程序复用器将数据包复用到输出队列中。 数据包如何被程序多路复用器复用到输出队列中取决于具体的设计和/或应用程序。 然后将来自输出队列的数据包送入多通道调制模块。 多通道调制模块接收分组并将它们路由到表示对应RF信道的各种调制器。 然后，各种调制器调制各个分组以产生对应的RF信号。 然后，这些RF信号被信道多路复用器复用成多信道RF信号。 然后将多通道RF信号转发到数模转换器，以转换成模拟多通道RF信号。 然后，频率块转换器接收模拟多声道RF信号并将其移动到较高频带以进行传输。 然后将移位的模拟多声道RF信号通过介质传送到一个或多个客户驻地设备。