DOCSIS 3.1 upstream OFDMA channel optimization

城市地区的人们通常通过由同轴电缆、光纤和电子元件(如放大器、双工器和定向耦合器/抽头)组成的物理设备连接到互联网，其布置方式使得一根同轴电缆可同时用于入站和出站流量。该工厂将用户住宅中的电缆调制解调器和电视连接到位于服务提供商站点上的电缆调制解调器终端系统。整个系统，包括控制它的软件，被称为CATV网络。被称为DOCSIS的标准(其最新版本是3.1)控制CATV网络的软件和硬件的结构，并规定网络中使用的所有组件的功能。

People in urban areas are usually connected to the internet via physical plant consisting of coaxial cable optical fibre and electronic components such as amplifiers, diplexers and directional couplers/taps arranged in such a way as to allow one coaxial cable to be used for both inbound and outbound traffic. This plant connects cable modems and TVs in a subscriber's residence to a cable modem termination system located on the service provider's site. The entire system, including the software that controls it, is referred to as the CATV network. A standard known as DOCSIS, the latest version of which is 3.1., controls the structure of both the software and hardware of the CATV network and specifies the functionality of all the components used in the network.