FTTX Evolution

1
FTTX Evolution
With the higher bandwidth requirement from
internet users, now many ISPs are upgrading their
access network. Compare with xDSL technology,
FTTx has a much higher bandwidth, among different
FTTx technology, GPON becomes more and more
popular because of its reasonable cost and high
bandwidth. As a leading Huawei FTTx solution
provider, Huanetwork is known for competitive
price, fast delivery and technical support
capability.
2
What is the PON?
Passive Optical Network
ONU
Passive Optical Splitter
Optical Line Terminal
ONU
OLT
PSTN
Internet
Passive Optical Splitter
ONU
CATV
Optical Network Unit

• PON is a port to multipoint (P2MP) structure of
  the passive optical network

3
Why is the GPON?

• GPON(Gigabit-capable Passive Optical Networks)
• GPON supports Triple-play services, competition
  can provide full-service program
• GPON supports high-bandwidth transmission, to
  meet user demand for high bandwidth services,
  such as HD TV, live TV, etc.
• GPON supports 20Km long distance access, that can
  solve the twisted coverage problem, reduce the
  network nodes
• GPON standard thoughtful, comprehensive support
  for integrated services

4
GPON principle--Data multiplexing
GPON system using WDM technology, single-fiber
bidirectional transmission (mandatory) In
order to isolate multiple users on the same fiber
direction of the signal to come and go, use the
following two multiplexing Downstream use the
broadcast technology Upstream uses TDMA(Time
Division Multiple Access ) technology.
5
GPON principle----- Downstream

• Broadcast

6
GPON principle----- Upstream

• TDMA(Time Division Multiple Access )

7
GPON Basic network performance parameters

• GPON Provide the following asynchronous transfer
  rate
• 0.15552 Gbit/s up, 1.24416 Gbit/s down
• 0.62208 Gbit/s up, 1.24416 Gbit/s down
• 1.24416 Gbit/s up, 1.24416 Gbit/s down
• 0.15552 Gbit/s up, 2.48832 Gbit/s down
• 0.62208 Gbit/s up, 2.48832 Gbit/s down
• 1.24416 Gbit/s up, 2.48832 Gbit/s down( Main use
  rate )
• 2.48832 Gbit/s up, 2.48832 Gbit/s down
• Support the maximum physical distance 20km
• Support the maximum distance difference 20km
• Splitting ratio 1128

8
GPON network protection mode

• There are two GPON interfaces port on OLT
  equipment.
• Such protection was limited to the trunk fiber
  failure, the system will automatically switch to
  the backup system, to achieve the protection of
  fiber optic backbone ?
• Object of protection is limited to the fiber
  between the OLT and the splitter and OLT board
  failure

ONU1
IFpon
OLT
2N splitter
?
IFpon
ONUN
IFpon
IFpon
Type B OLT Port backup
9
GPON network protection mode

• There are two GPON interfaces port on the OLT
  and ONT ?
• The GPON interfaces port on OLT work in 11
  mode.
• Such protection means an all-optical switching
  mode protection, OLT and ONU completely different
  between the two channels, you can ensure that all
  faults have been restored ?

ONU1
IFpon
IFpon
1N splitter
OLT
IFpon
IFpon
ONUN
1N splitter
IFpon
IFpon
Type C Full backup