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General PresentationGeneral PresentationSeptember, 2009September, 2009
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Supporting service sophistication, the access networksmust evolve to support all possible services from High Speed
Internet to 3D immersive telepresence or HDTV.
Become the playground for video communications,
Video traffic is the main driver behind the Internet trafficgrowth with an aprox 60% of the total IP consumer traffic by
2012, and to
Have a clear business orientation, so that Telecom
Operators could have a short ROI from the CAPEX: Ascenario with High Bandwidth demanding services as well
as SLA guarantee will have to be accompanied by the
necessary upgrading of access networks for supporting
them.
Challenges of future packet NetworksChallenges of future packet Networks
Providing value to current Broadband approaches by:
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Pragmatism scalable enough to address the residential
market while being flexible enough to address the corporate one
Simplicity simple and cost-efficient way to provide
sufficient guaranteed Broadband resources for the mass
market and corporate needs, but without the need to
meet the requirements of all conceivable services.
PragmatismPragmatism andand simplicitysimplicity
The Networks community demands a pragmatic and simple way
to provide services that meet users expectations and are able to
maintain their level of satisfaction always, as well as reducingCAPEX and OPEX for Operators.
Next generation access networks will be based on Fiberdeployments as it is the only communications media that satisfies
the future services bandwidth demand in a pragmatic and simpleway.
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ATM
Switch
1,2G or 622Mb/s down
155/622Mb/s up
15,7-31,6 Mb/s/sub
3,9-15,6 Mb/s/sub
ITU G.984
BPON
Separate RF video overlay
ATM-only transport
Standardized form available
Multi
service
Switch
(OLT)
1,2G or 2,4 Gb/s down
155/2488Mb/s up
33,4-66,8 Mb/s/sub
3,8-60,4 Mb/s/sub
ITU G.984
GPON
Separate RF video overlay
In-band video
Native protocol transport
using GEM
Standardized form available
Ethernet
Switch
(OLT)
1Gb/s28,5 Mb/s/sub
25,7 Mb/s/sub
IEEE
802.3ah
EPON
In-band video
Ethernet-only transport
Standardized form available
EthernetSwitch
100Mb/sEthernetP2P-DF
In-band video
Ethernet-only transportPassive outside plant
Standardized form available
100Mb/s
Ethernet
Switch
Nx1 Gb/s
or 10Gb/sEthernet
P2P-AON
In-band video
Ethernet-only transport
Active outside plant
Standardized form available
100Mb/s/subActive
Switch
FTTHFTTH deploymentdeployment alternativesalternatives
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Pragmatic GPON can address up to 128 users with only one
fiber (up to the fiber flexibility point) with less floor space at the
central office, longer reach than other PON alternatives and
lower costs in upgradability.
Simplicity Management, operation and managementin GPON networks provide the lower OPEX of all FTTH
alternatives while efficiently addressing all services QoS
requirements
GPON as best candidate for FTTHGPON as best candidate for FTTH
Although the different alternatives have their pros and
cons, the best candidate for a pragmatic and simple
FTTH deployment is GPON.
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Single fiber infrastructure for all services
(voice, data and video)
Passive optical plant
Typically up to 20km (28dB)
Central office
Level 1Split ratio
Level 2
Split ratio
Single
Family
homes
Multi-Dwelling
units
Small/Medium
entreprises
ONU
ONT
ONT
ONT
ONU
ONU
Optical Line
Terminal (OLT)
2.5Gb/s
1.2Gb/s
1500nm to support
Local CATV serviceif required
1490nm
1310nm
Voice, data and video
TypicalTypical GPONGPON NetworkNetwork ArchitectureArchitecture
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What is needed to knowWhat is needed to know
in a GPON Network?in a GPON Network?
PERFORMANCE BEHAVIOR CHANGES. In a GPON Network thebandwidth is dynamically assigned and the services are provided
using different traffic classes. Changes in the performance canlead to significant service degradations. These situations have tobe identified and solved before the users start calling theHelpdesk
BANDWIDTH ALLOCATION. GPON Access networks are alsoprovided as neutral networks and exploited by differentresellers simultaneously, one of the main worries is that thebandwidth provided to each of their customer is the same as theone contracted
INTEROPERABILITY ISSUES. In GPON Networks there are ONUsand OLT from different system vendors, and although all claim tocomply with the standards there are always small implementationissues that introduce malfunctions within the network.
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REAL TIME UPPER-LAYER TRAFFIC EXTRACTION. GPON Doctor allows the
decryption of bidirectional and Multicast GEM port in real-time and its extraction for
analysis by external Upper-layer traffic analyzer or a protocol analyzer like Wireshark
installed as application within GPON Doctor.
GPON TRAFFIC ANALISYS. GPON Doctor is able to
capture and analyze all the traffic flow between the OLT
and the ONUs/ONTs in a vendor independent way. It willclearly identify interoperability issues as well as show the
configuration status of all active elements in the network,
including the entity-relation diagram of OMCI entities.
BANDWIDTH ALLOCATION MONITORING. GPON
Doctor is able to identify the bandwidth allocated to each
ONU/ONT in real time.
BROADBAND FORUM TR-156/TR-167 ANALYSIS. Infers, within the ODN, the tagging
behavior and VLAN filtering done at the ONTs according to OLT OMCI configuration.
Generation of the association map from the PON transport architecture.
What GPON Doctor can do for you?What GPON Doctor can do for you?
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Connect
OLT ONTOLT ONT
Configure & StartCapture
(do calibration if
required)
StopCapture
NavigatethroughCapture
Analyze &Evaluate
ReviewInferred Info &
Error Report
How GPON Doctor 8000 works?How GPON Doctor 8000 works?
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