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Work item:
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G.9954
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Subject/title:
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Home networking transceivers - Enhanced physical, media access, and link layer specifications
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Status:
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Approved on 2007-01-09
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Approval process:
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AAP
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Type of work item:
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Recommendation
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Version:
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Rev.
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Equivalent number:
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-
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Timing:
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-
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Liaison:
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-
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Supporting members:
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-
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Summary:
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This specification defines the PHY, MAC, LINK and CONVERGENCE protocol stack layers for the G.9954.X system providing the following features:
" Operation over Phoneline or/and over Coax.
" PHY-layer payload transmission rates of 4 - 320 Mbit/sec.
" Rate adaptive transceivers that optimize data rates and packet error rates for dynamically varying channel conditions on a per-packet basis.
" QAM modulation technique for communication over phone wire or coaxial cabling.
" Spectrum notching over Phoneline for compatibility with Amateur Radio services.
" Synchronous MAC protocol controlled by a dynamically elected master employing a collision avoidance media access strategy.
" Support for constant and variable bit-rate data services.
" Peer-to-Peer communication within a master-controlled network.
" Packet aggregation (packetization) performed within the G.9954.X protocol stack layer up to latency limits of the service flow and available transmission bandwidth.
" Quality of Service guarantees for bandwidth, jitter, latency and BER.
" QoS support for services with explicit traffic and rate specifications providing a link layer that is well suited for streaming audio and video.
" Protocol-specific convergence layers.
" Backward Compatible with G.9951/G.9952 in mode A over phoneline using G.9951/G.9952 asynchronous MAC protocol.
" Coexistence and interoperability between G.9954 and G.9954.X devices in a mixed network.
" Compatibility with other phoneline services such as POTS, V.90, ISDN and G.992.1, G.992.2, G.992.3, and G.992.4.
" Compatibility with other coaxial services such as VDSL, VDSL2 and Cable-TV channels.
" Interoperability between Phone and Coax PHY layers using spectral modes A & B thus allowing a mixed phoneline/coaxial network.
" Local and remote management of G.9954.X devices.
" Provisions for future security extensions.
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Comment:
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-
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Reference(s):
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Historic references:
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Contact(s):
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| ITU-T A.5 justification(s): |
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First registration in the WP:
Unknown
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Last update:
2007-02-26 15:10:05
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