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DOCSIS 3.1 devices enable multiple Gigabit broadband speeds

Posted: 14 Sep 2015 ?? ?Print Version ?Bookmark and Share

Keywords:Broadcom? DOCSIS 3.1? modem? transmitter? receiver?

Broadcom Corp. has unveiled three DOCSIS 3.1-based devices for Converged Cable Access Platform (CCAP) equipment. According to the company, the BCM3047, BCM31442 and BCM3222 enable CCAP vendors to build and deploy DOCSIS 3.1-compliant equipment that supports multiple Gigabit cable broadband speeds over coax to offer novel content and services to home subscribers.

Broadcom's silicon for DOCSIS 3.1 CCAP equipment works in conjunction with Broadcom's recently announced BCM3390 device for cable modems to provide the industry's only end-to-end DOCSIS 3.1 solution, the company indicated. The platform enables cable operators to leverage the existing cable plant to compete with fibre optic service. Early adopters of Broadcom's DOCSIS 3.1 technology include both major cable operators such as Comcast and Liberty Global, and CCAP equipment suppliers such as ARRIS and Harmonic.

Broadcom's chips provide a complete physical (PHY) and media access control (MAC) layer solution for operators deploying DOCSIS 3.1 in CCAP infrastructure equipment. The PHY devices include the BCM31442 upstream burst receiver that receives transmissions from the home toward the network and BCM3047 downstream transmitter which supports transmissions from the network to the home. The MAC device, the BCM3222, supports rapid and efficient cable modem access to network resources.

According to the company, the BCM3047 is the industry's first single-chip transmitter with integrated high-speed DAC enabling transmission out to 1.2GHz on the cable plant and supports up to 160 SC-QAM and up to six OFDM transmitters. On the other hands, Broadcom said the BCM31442 is the industry's first DOCSIS 3.1 burst receiver with integrated ADC supporting up to 300MHz of upstream spectrum and supports two upstream ports across 24 SC-QAM and four OFDMA receivers. The BCM3222 MAC device is capable of supporting up to 25Gb/s, added the company.

Broadcom's BCM3047, BCM31442 and BCM3222 are sampling.

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