The document discusses the challenges of future packet networks and fiber-to-the-home (FTTH) deployment alternatives. It argues that next generation access networks will be based on fiber deployments using Gigabit-capable Passive Optical Network (GPON) technology. GPON is presented as the best candidate due to its pragmatic and simple approach in addressing all services while requiring less space and equipment at lower costs than other alternatives. The document also summarizes how GPON Doctor can help monitor and analyze GPON network traffic and performance.

1. General Presentation
September, 2009
© 2009 TECNALIA - TELNET-RI

2. Challenges of future packet Networks
Providing value to current Broadband approaches by:
Supporting service sophistication, the access networks
must 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 traffic
growth 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: A
scenario 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.
© 2009 TECNALIA - TELNET-RI

3. Pragmatism and simplicity
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 reducing
CAPEX and OPEX for Operators.
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.
Next generation access networks will be based on Fiber
deployments as it is the only communications media that satisfies
the future services bandwidth demand in a pragmatic and simple
way. © 2009 TECNALIA - TELNET-RI

4. FTTH deployment alternatives
1,2G or 622Mb/s down 15,7-31,6 Mb/s/sub
ITU G.984 ATM Separate RF video overlay
BPON ATM-only transport
Switch 155/622Mb/s up 3,9-15,6 Mb/s/sub Standardized form available
1,2G or 2,4 Gb/s down 33,4-66,8 Mb/s/sub
Multi Separate RF video overlay
ITU G.984 In-band video
service
GPON 155/2488Mb/s up Native protocol transport
Switch 3,8-60,4 Mb/s/sub using GEM
(OLT) Standardized form available
1Gb/s
IEEE 28,5 Mb/s/sub In-band video
Ethernet
802.3ah Ethernet-only transport
Switch Standardized form available
EPON 25,7 Mb/s/sub
(OLT)
In-band video
Ethernet 100Mb/s 100Mb/s Ethernet-only transport
Ethernet
P2P-DF Passive outside plant
Switch Standardized form available
Nx1 Gb/s In-band video
Ethernet Ethernet or 10Gb/s 100Mb/s/sub Ethernet-only transport
P2P-AON
Active Active outside plant
Switch
Switch Standardized form available
© 2009 TECNALIA - TELNET-RI

5. GPON 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.
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 management
in GPON networks provide the lower OPEX of all FTTH
alternatives while efficiently addressing all services QoS
requirements
© 2009 TECNALIA - TELNET-RI

6. Typical GPON Network Architecture
Passive optical plant
Typically up to 20km (28dB)
Central office
ONU Small/Medium
entreprises
1500nm to support
Local CATV service
if required
ONT Single
1490nm Family
2.5Gb/s homes
1310nm
Level 1 ONT
1.2Gb/s
Split ratio
Voice, data and video Level 2 ONT
Split ratio
ONU Multi-
Optical Line
Dwelling
Terminal (OLT)
units
Single fiber infrastructure for all services ONU
(voice, data and video)
© 2009 TECNALIA - TELNET-RI

7. What is needed to know
in a GPON Network?
• PERFORMANCE BEHAVIOR CHANGES. In a GPON Network the
bandwidth is dynamically assigned and the services are provided
using different traffic classes. Changes in the performance can
lead to significant service degradations. These situations have to
be identified and solved before the users start calling the
Helpdesk
• BANDWIDTH ALLOCATION. GPON Access networks are also
provided as neutral networks and exploited by different
resellers simultaneously, one of the main worries is that the
bandwidth provided to each of their customer is the same as the
one contracted
• INTEROPERABILITY ISSUES. In GPON Networks there are ONUs
and OLT from different system vendors, and although all claim to
comply with the standards there are always small implementation
issues that introduce malfunctions within the network.
© 2009 TECNALIA - TELNET-RI

8. What GPON Doctor can do for you?
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 will
clearly 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.
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. - TELNET-RI
© 2009 TECNALIA

9. How GPON Doctor 8000 works?
Configure & Start
Capture Stop
Connect
(do calibration if Capture
required)
OLT ONT
Review Navigate
Analyze & through
Inferred Info &
Evaluate Capture
Error Report
© 2009 TECNALIA - TELNET-RI

10. Thanks for your attention
www.telnet-ri.es
© 2009 TECNALIA - TELNET-RI