Document No:
GSC16-GTSC9-04
Source:
ITU-T
Contact:
Yoichi MAEDA
GSC Session:
GTSC9
Agenda Item:
4.3: Home Networking
Home networking standards in
ITU-T SG15
Yoichi MAEDA
ITU-T SG15
Halifax, 31 Oct – 3 Nov 2011
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Highlight of Current Activities
Recommendations for Access/Home Networks
• G.hn: OFDM-based 1 Gbps unified technology operating over
“anywire” (PLC, phoneline, coax) for very high speed home
networking, and other access applications such as demand side
management, in-home energy management, and more.
Coexistence between multiple in-home PLC systems and also
coexistence of access PLC with in-home PLC is a key issue.
• G.hn LCP: G.hn Low Complexity Profile (low power consumption,
low cost, 25 MHz band, reduced data rate 2-18 Mbps) for home
automation, automotive, and many other green applications.
• G.hnem: OFDM-based high data rate NB-PLC for demand side
management, distribution automation, AMI, in-home energy
management, home automation, PEV charging, etc.
• G.9970/9971/9973: Generic home network transport architecture,
Requirements for IP home networks, and Protocol for
identification of home network topology.
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Strategic Direction
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Home networking/PLC related Standards
BB-PLC
G.hn
(G.9960, G.9961)
G.CX
(G.9972)
IEEE 1901
(including ISP)
ISO/IEC 12139-1
SDO
NB-PLC
ITU-T
G.hnem
(G.9955, G.9956)
IEEE
IEEE P1901.2
IEC
ISO/IEC 14908-3 (LonTalk)
ISO/IEC 14543-3 (KNX)
IEC 61334-5
The issue of updating coexistence G.9972 is that the ISO/IEC 12139-1
broadband PLC standard coexist with G.hn and IEEE 1901.
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Challenges
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Remote Management of Customer Premises Equipment (CPE)
• Draft new Recommendation ITU-T G.9980 (ex. G.cwmp),
Remote management of CPE over broadband networks
– CPE WAN Management Protocol (CWMP) for TAP
• The Broadband Forum (BBF) CPE WAN Management
Protocol (CWMP) suite of specifications based on BBF
TR-069 is by far the mostly widely practiced method for
remote management of CPE
• ITU-T references BBF CWMP in G.9960, G.9970,
G.997.1
• ETSI has standardized BBF CWMP in ES 203 069
• ATIS references BBF CWMP in its specifications
• IETF has coordinated its work with BBF CWMP
• ISO/IEC is encouraged to align its CPE management
standards with the existing worldwide practice
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Next Steps / Actions
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ITU-T’s role in cooperation with other bodies
• The power grid often crosses international or
jurisdictional boundaries, but applications and devices
must interoperate regardless of those boundaries
• The Telecom/Power/CE convergence for the Smart Grid
will drive a new echo-system of products and this must
happen under the auspices of International SDOs
• ITU-T can have a major role in facilitating the
convergence of the communications, power, and CE
worlds
• Cooperation between the major International SDOs
is key to success!!
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Supplementary Slides
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G.hn suite of Recommendations
• Best-in-class home networking performance (up to 1 Gbps) supporting all types
of inside wiring with one technology:
–
Powerline, Coax, Phoneline, CAT 5
• Best-in-class control of ElectroMagnetic Compatibly (EMC) & coexistence
(developed in cooperation with ITU-R experts)
–
PSD limit and shaping
–
Both permanent and dynamic frequency notching
–
Dynamic power control minimizes transmitted power without sacrificing QoS
–
Automatic coordination with neighbor networks
• G.hn Recommendations:
–
G.9960 Physical layer (support of relay nodes for expanded coverage)
–
G.9961 Data link layer (supports full QoS and multicast)
–
G.9962 HN management (including BBF TR69 support)
–
G.9963 MIMO (advanced performance)
–
G.9964 HN power spectrum limits for EMC
–
G.9972 coexistence with other broadband PLC systems
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G.hnem suite of standards
• Low complexity OFDM-based NB-PLC technology
optimized for Smart Grid and home automation
• Addresses both access (low/medium voltage
distribution lines) and in-home applications at
frequencies below 500 kHz, including all CENELEC
bands
• Includes support for PRIME and G3-PLC in stand
alone Normative Annexes
• G.hnem Recommendations:
– G.9955 physical layer
– G.9956 data link layer
• Approval expected for Dec. 2011
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G.9972 BB-PLC coexistence
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• An in-home PLC network is not contained within the home
• PLC signals in neighboring apartments will interfere with each other
• The meter can act as a gate, but in many cases offers only a few dB of signal attenuation
so that also in-home and utility PLC networks will interfere
• Problem is worsened by:
•
•
•
•
An increase in residence density, rural areas are less affected
Cross-cable coupling in multiple dwelling units
Penetration of PLC technology
Usage of PLC spectrum is not regulated so that any PLC technology can use channel
resources without having any legal obligation to protect other PLC technology from
interference
• Given the availability of multiple non-interoperable PLC standards (IEEE
1901-FFT, IEEE 1901-Wavelet, G.996x (G.hn), IEC-ISO/IEC 12139-1) and a
plethora of non-interoperable proprietary technologies (HomePlug
AV/Extended, HomePlug Green PHY, Panasonic HD-PLC, UPA Powermax,
Gigle MediaXtreme, etc.), the issue of mutual interference can hinder the
success of PLC
• The solution to interference between non-interoperable PLC technologies is
“coexistence,” which is a resource sharing protocol that allows PLC
technologies to share the medium in an orderly way
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cntd; G.9972 BB-PLC coexistence
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• The Inter-System Protocol (ISP) is a broadband PLC coexistence scheme that allows
coexistence of up to four simultaneously present PLC technologies
• It has been included in the IEEE 1901 PHY/MAC standard
• It is standardized as a stand-alone recommendation in ITU-T G.9972
• The ISP coexistence scheme in G.9972 can be used to ensure:
• That in-home, access, and Smart Grid SDO-based broadband PLC will coexist – it currently
supports coexistence between IEEE 1901-FFT, IEEE 1901-Wavelet, and G.hn and can be
modified to include also IEC-ISO/IEC 12139-1
• That the operation of Smart Grid and home networking devices can be decoupled and allowed
to mature at their traditional obsolescence rate
• That utilities and service providers can avoid resolving service issues caused by interference
between non-interoperable PLC devices supporting different applications
• In one word, coexistence=“insurance that PLC will not stop working” due to
interference created by neighboring non-interoperable devices
• As a response to concerns that some vendors may not implement ISP in their
products, PAP 15 of SGIP made the strong recommendation to NIST that all
broadband PLC technologies must implement ISP and also turn it on at all times
• For the success of coexistence it is necessary to have the availability of an
international and stand alone standard, and G.9972 ensures this
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