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DOCSIS employs a mixture of deterministic access methods for upstream transmissions, specifically time-division multiple access (TDMA) for DOCSIS 1.0/1.1 and both TDMA and S-CDMA for DOCSIS 2.0 and 3.0, with a limited use of contention for bandwidth reservation requests. In TDMA, a cable modem requests a time to transmit and the CMTS grants it ...
In March 2017, SCTE/ISBE society and MoCA consortium began creating a new "standards operational practice" (SCTE 235) to provide MoCA 2.0 with DOCSIS 3.1 interoperability. Interoperability is necessary because both MoCA 2.0 and DOCSIS 3.1 may operate in the frequency range above 1 GHz.
1.2/0.075 kbit/s: 0.12/0.0075 ... DOCSIS 2.0 [13] (cable modem) 38/27 Mbit/s: 4.75/3.375 ...
The second is the Downstream External PHY Interface (DEPI). The DEPI protocol controls the delivery of DOCSIS frames from the M-CMTS Core to the EQAM devices [20] Some of the challenges that entail an M-CMTS platform are increased complexity in RF combining and an increase in the number of failure points. One of the benefits of an M-CMTS ...
Under the DOCSIS 3.0 and 3.1 specifications for data over cable TV systems, multiple channels may be bonded. Under DOCSIS 3.0, up to 32 downstream and 8 upstream channels may be bonded. [27] These are typically 6 or 8 MHz wide.
DOCSIS RFI 1.1 [16] later added more robust and standardized QoS mechanisms to DOCSIS. DOCSIS 2.0 added support for S-CDMA PHY, while DOCSIS 3.0 added IPv6 support and channel bonding to allow a single cable modem to use concurrently more than one upstream channel and more than one downstream channel in parallel.