A lucky customer in Philadelphia got early access to Comcast’s first public DOCSIS 3.1 gigabit cable modem. The service, that was due to officially launch in 2016, was kick started early by the company in a campaign that tries to ensure that other large rivals, such as Google Fiber or AT&T’s Gigapower do not get too strong of a foothold in the market.
Additional tests are being run by Comcast in different parts of the US such as Atlanta, northern California and other parts of Pennsylvania.
DOCSIS 3.1 is a new generation of cable technology. It helps operators continue to meet the increased demand from customers for high speed connections and sophisticated applications.
DOCSIS 3.1 is a technology that promises to deliver speed by using the latest and greatest forms of encoding such as LDPC. very high modulation orders (4096 QAM for example), more than 1 GHz of usable spectrum and support of QoS and low latencies.
DOCSIS 3.1 promises support for a speed of up to 10 Gb/s downstream and 1 Gb/s upstream network capacity.
One of the main benefits of DOCSIS 3.1 is that providers no longer will have to overhaul their networks in order to provide increased speed and ultimately this is the first step of bringing gigabit class internet access to the mainstream population.
LDPC: It stands for low-density-parity-check and is a linear error correcting code, i.e. a method of transmitting messages over a noisy transmission channel.
QAM: It stands for quadrature amplitude modulation, the format by which digital cable channels are encoded and transmitted via cable television providers. QAM is used in a variety of communications systems such as Dial-up modems and WiFi.
QoS: Quality of service is the overall performance of a telephony or computer network, particularly the performance seen by the users of the network.