The first Ethernet standard, known as 10BASE5 (ThickNet) in the family of IEEE 802.3, specified baseband operation over 50 ohm coaxial cable, which remained the principal medium into the 1980s, when 10BASE2 (ThinNet) coax replaced it in deployments in the 1980s; both being replaced in the 1990s when thinner, cheaper twisted pair cabling came to dominate the market. The use of coaxial cable for Ethernet has been deprecated by the IEEE as of 2011.[1]
Research in Ethernet transmission over coaxial cable continued, as both consumers and telecommunications operators strive to use existing 75 ohm coaxial cable installations (from cable television or CATV), to carry broadband data into and through the home, and into multiple dwelling unit (MDU) installations.
Most EoC technologies are being developed for in-home or on-premises networking and are expected to be operated within the domain of a single operator.
Homeplugedit
HomePlug AV as well as its later extension, HomePlug AV2 both operate in a portion of the RF spectrum directly below what is commonly used for terrestrial FM radio broadcasting. HomePlug AV uses BPSK, QPSK, 16 QAM, 64 QAM, 256 QAM, and 1024 QAM modulation strategies between 2 MHz and 30 MHz while the more recent HomePlug AV2 standard extends the upper bound of its spectral use to 86 MHz.
ITU-T G.hnedit
The ITU-TG.hn standard provides high-speed (up to 1 Gigabit/s) local area networking over existing home wires, including coaxial cable, power lines and phone lines. It defines an Application Protocol Convergence (APC) layer for encapsulation standard 802.3 Ethernet frames into G.hn MAC Service Data Units (MSDUs).
Other ITU-T standards for home networking over coaxial cable include G.9954, also known as HomePNA 3.1.[2]
EoC research is focused on the use of existing cable television (CATV) infrastructure for Internet access or broadband data transmission for the purpose of being compatible with the existing CATV (or sometimes satellite television) broadcast signals simultaneously transmitted on the same cable. The EoC technologies must operate outside the frequency domain currently used for CATV or for satellite receiver to set-top box transmissions. Most EoC technologies are designed to operate in frequency bands above 1 GHz, which is the upper bound of television signals and for systems designed to operate in North America using the SCTE 55-1 and SCTE 55-2 CATV transmission systems, as well as in most of Europe and portions of Asia. In many localities CATV systems operate only up to 550 MHz or 750 MHz, wherein some EoC technologies focus on using spectrum between 550 MHz or 750 MHz and 1 GHz. Though less costly, they could potentially conflict with future spectrum expansion up to 1 GHz. Some markets focus on using this 750 MHz to 1 GHz spectrum for EoC, specifically avoiding EoC bands above 1 GHz due to potential ingress noise from over-the-air transmissions and cellular systems.
See alsoedit
DOCSIS - Data Over Cable Service Interface Specification
Referencesedit
^IEEE 802.3-2012 10. Medium attachment unit and baseband medium specifications, type 10BASE2
^ITU-T Study Group 15 (January 14, 2008). "ITU-T Rec. G.9954 (01/2007) Home networking transceivers - Enhanced physical, media access, and link layer specifications" (PDF). International Telecommunication Union (ITU). Retrieved April 12, 2021.{{cite web}}: CS1 maint: numeric names: authors list (link)
December 15, 2023
ethernet, over, coax, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, july,. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Ethernet over coax news newspapers books scholar JSTOR July 2014 Learn how and when to remove this template message Ethernet over Coax EoC is a family of technologies that supports the transmission of Ethernet frames over coaxial cable The Institute of Electrical and Electronics Engineers IEEE maintains all official Ethernet standards in the IEEE 802 family Contents 1 History 1 1 Homeplug 1 2 ITU T G hn 1 3 MoCA 2 CATV compatibility 3 See also 4 ReferencesHistory editThe first Ethernet standard known as 10BASE5 ThickNet in the family of IEEE 802 3 specified baseband operation over 50 ohm coaxial cable which remained the principal medium into the 1980s when 10BASE2 ThinNet coax replaced it in deployments in the 1980s both being replaced in the 1990s when thinner cheaper twisted pair cabling came to dominate the market The use of coaxial cable for Ethernet has been deprecated by the IEEE as of 2011 1 Research in Ethernet transmission over coaxial cable continued as both consumers and telecommunications operators strive to use existing 75 ohm coaxial cable installations from cable television or CATV to carry broadband data into and through the home and into multiple dwelling unit MDU installations Most EoC technologies are being developed for in home or on premises networking and are expected to be operated within the domain of a single operator Homeplug edit HomePlug AV as well as its later extension HomePlug AV2 both operate in a portion of the RF spectrum directly below what is commonly used for terrestrial FM radio broadcasting HomePlug AV uses BPSK QPSK 16 QAM 64 QAM 256 QAM and 1024 QAM modulation strategies between 2 MHz and 30 MHz while the more recent HomePlug AV2 standard extends the upper bound of its spectral use to 86 MHz ITU T G hn edit The ITU T G hn standard provides high speed up to 1 Gigabit s local area networking over existing home wires including coaxial cable power lines and phone lines It defines an Application Protocol Convergence APC layer for encapsulation standard 802 3 Ethernet frames into G hn MAC Service Data Units MSDUs Other ITU T standards for home networking over coaxial cable include G 9954 also known as HomePNA 3 1 2 MoCA edit Main article Multimedia over Coax AllianceCATV compatibility editThis section does not cite any sources Please help improve this section by adding citations to reliable sources Unsourced material may be challenged and removed July 2015 Learn how and when to remove this template message EoC research is focused on the use of existing cable television CATV infrastructure for Internet access or broadband data transmission for the purpose of being compatible with the existing CATV or sometimes satellite television broadcast signals simultaneously transmitted on the same cable The EoC technologies must operate outside the frequency domain currently used for CATV or for satellite receiver to set top box transmissions Most EoC technologies are designed to operate in frequency bands above 1 GHz which is the upper bound of television signals and for systems designed to operate in North America using the SCTE 55 1 and SCTE 55 2 CATV transmission systems as well as in most of Europe and portions of Asia In many localities CATV systems operate only up to 550 MHz or 750 MHz wherein some EoC technologies focus on using spectrum between 550 MHz or 750 MHz and 1 GHz Though less costly they could potentially conflict with future spectrum expansion up to 1 GHz Some markets focus on using this 750 MHz to 1 GHz spectrum for EoC specifically avoiding EoC bands above 1 GHz due to potential ingress noise from over the air transmissions and cellular systems See also editDOCSIS Data Over Cable Service Interface SpecificationReferences edit IEEE 802 3 2012 10 Medium attachment unit and baseband medium specifications type 10BASE2 ITU T Study Group 15 January 14 2008 ITU T Rec G 9954 01 2007 Home networking transceivers Enhanced physical media access and link layer specifications PDF International Telecommunication Union ITU Retrieved April 12 2021 a href Template Cite web html title Template Cite web cite web a CS1 maint numeric names authors list link Retrieved from https en wikipedia org w index php title Ethernet over coax amp oldid 1184068928, wikipedia, wiki, book, books, library,
