SCTE 220-1 2016
- DOCSIS 3.1 Part 1: Physical Layer Specification [Input]
- standard by Society of Cable Telecommunication Engineers, 2016
- Category: SCTE
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This standard is part of the DOCSIS® family of specifications. In particular, it is part of a series of standards thatdefines the fifth generation of high-speed data-over-cable systems, commonly referred to as the DOCSIS 3.1standards. This standard was developed for the benefit of the cable industry, and includes contributions by operatorsand vendors from North and South America, Europe and Asia.This generation of the DOCSIS specifications builds upon the previous generations of DOCSIS specifications(commonly referred to as the DOCSIS 3.0 and earlier specifications), leveraging the existing Media Access Control(MAC) and Physical (PHY) layers, but with the addition of a new PHY layer designed to improve spectralefficiency and provide better scaling for larger bandwidths (and appropriate updates to the MAC and managementlayers to support the new PHY layer). It includes backward compatibility for the existing PHY layers in order toenable a seamless migration to the new technology.
There are differences in the cable spectrum planning practices adopted for different networks in the world. For thenew PHY layer defined in this specification, there is flexibility to deploy the technology in any spectrum plan;therefore, no special accommodation for different regions of the world is required for this new PHY layer.
However, due to the inclusion of the DOCSIS 3.0 PHY layers for backward compatibility purposes, there is still aneed for different region-specific physical layer technologies. Therefore, three options for physical layertechnologies are included in this specification, which have equal priority and are not required to be interoperable.One technology option is based on the downstream channel identification plan that is deployed in North Americausing 6 MHz spacing. The second technology option is based on the corresponding European multi-programtelevision distribution. The third technology option is based on the corresponding Chinese multi-program televisiondistribution. All three options have the same status, notwithstanding that the document structure does not reflect thisequal priority. The first of these options is defined in Sections 5 and 6, whereas the second is defined by replacingthe content of those sections with the content of Annex C. The third is defined by replacing the content of thosesections with the content of Annex D. Correspondingly, [ITU-T J.83-B] and [CEA-542] apply only to the firstoption, and [EN 300 429] apply to the second and third. Compliance with this document requires compliance withone of these implementations, but not with all three. It is not required that equipment built to one option shallinteroperate with equipment built to the other.
Compliance with frequency planning and EMC requirements is not covered by this specification and remains theoperators' responsibility. In this respect, [FCC15] and [FCC76] are relevant to the USA; [CAN/CSA CISPR 22-10]and [ICES 003 Class A] to Canada; [EG 201 212], [EN 50083-1], [EN 50083-2], [EN 50083-7], [EN 61000-6-1],and [EN 61000-6-3] are relevant to the European Union; [GB 8898-2011] and [GB/T 11318.1-1996] are relevantto China.
There are differences in the cable spectrum planning practices adopted for different networks in the world. For thenew PHY layer defined in this specification, there is flexibility to deploy the technology in any spectrum plan;therefore, no special accommodation for different regions of the world is required for this new PHY layer.
However, due to the inclusion of the DOCSIS 3.0 PHY layers for backward compatibility purposes, there is still aneed for different region-specific physical layer technologies. Therefore, three options for physical layertechnologies are included in this specification, which have equal priority and are not required to be interoperable.One technology option is based on the downstream channel identification plan that is deployed in North Americausing 6 MHz spacing. The second technology option is based on the corresponding European multi-programtelevision distribution. The third technology option is based on the corresponding Chinese multi-program televisiondistribution. All three options have the same status, notwithstanding that the document structure does not reflect thisequal priority. The first of these options is defined in Sections 5 and 6, whereas the second is defined by replacingthe content of those sections with the content of Annex C. The third is defined by replacing the content of thosesections with the content of Annex D. Correspondingly, [ITU-T J.83-B] and [CEA-542] apply only to the firstoption, and [EN 300 429] apply to the second and third. Compliance with this document requires compliance withone of these implementations, but not with all three. It is not required that equipment built to one option shallinteroperate with equipment built to the other.
Compliance with frequency planning and EMC requirements is not covered by this specification and remains theoperators' responsibility. In this respect, [FCC15] and [FCC76] are relevant to the USA; [CAN/CSA CISPR 22-10]and [ICES 003 Class A] to Canada; [EG 201 212], [EN 50083-1], [EN 50083-2], [EN 50083-7], [EN 61000-6-1],and [EN 61000-6-3] are relevant to the European Union; [GB 8898-2011] and [GB/T 11318.1-1996] are relevantto China.
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