New-Tech Europe Magazine | April 2019

Upstream: (8 channels * 27 Mbps = 216Mbps) + (2 OFDMA channels * 940Mbps = 1,880 Mbps) Total: ~ 2,096Mbps In Europe Downstream: (32 channels * 50Mbps=1600 Mbps) + (2 OFDM channels * 1,880 Mbps = 1,400 Mbps) Total: ~ 5,360Mbps Upstream: (8 channels * 27 Mbps = 216Mbps) + (2 OFDMA channels * 940Mbps = 1,880 Mbps) Total: ~2,096Mbps The Future of Cables

Image 1: Example of a system

DOCSIS Specification Version

Production Date

Downstream Upstream Characteristics

Upstream and downstream symmetric speed

Full Duplex/ Bi-directional

2017

10 Gbit/s

10 Gbit/s

General System Components CMTS 8 , content servers, security servers, TFTP servers, telephony servers, time servers, Cable modem, consumer devices connected via Ethernet or Wi-Fi, etc. Cable Modem Enables Connectivity to Consumer Devices People connecting via cable internet have several ways to connect to the cable modem, such as a ethernet cable, Wi-Fi, Multimedia Over Coax Alliance (MoCA* 9 which substitutes a wired home network running over coax cable infrastructure) and smart home networking technologies

such as Bluetooth*, Zigbee*, and more. The CMTS is managing the network, and sends commands and instructions to modems to enable the network to optimize the synchronization of transmission time, frequency, and transmission intensities. This enables the transmission of information at high rates without interruption. The Interconnection between Consumer Devices and How the specification Relates to Them Network management is the sole

responsibility of the CMTS. This equalizes and controls the traffic on the network. In addition, this gives the CMTS the authority to enforce the specification, and forces the cable modems to comply with the specification. Different Cable Modem Modes from Power-up to Full Wide Bandwidth The starting point of the cable modem is that the CMTS periodically transmits unique characteristics of

3 Single Carrier Quadrature Amplitude Modulation - is the name of a family of digital modulation methods and a related family of analog modulation methods widely used in modern telecommunications to transmit information. 4 Forward Error Correction - is a technique used for controlling errors in data transmission over unreliable or noisy communication channels. 5 Low Density Parity Check - is a linear error correcting code, a method of transmitting a message over a noisy transmission channel.

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