Wednesday, September 20, 2017

Teknologi NG-PON2 dan NGS-PON

Tabel berikut merupakan persamaan dan perbedaan antara NG-PON2 dan NGS-PON

Attribut NG-PON2 NGS-PON
Standard G.989.x G.9807.x
Nominal line rate
  • 40 Gbit/s downstream capacity and 20 km reach with at least 1:64 split
  • 10 Gbit/s upstream capacity and 20 km reach with at least 1:64 split
  • Access to peak rates of 10/2.5 Gbit/s downstream/upstream
  • Longer distances with lower split ratios are also possible
Downstream and upstream nominal line rates per channel:
  • 10 Gbit/s downstream dan 10 Gbit/s upstream
  • 10 Gbit/s downstream and 2.5 Gbit/s upstream
  • 2.5 Gbit/s downstream and 2.5 Gbit/s upstream
line rate transmisi, kelipatan 8 kHz.
Sistem XGS-PON mendukung : downstream line rate 9.95328 Gbit/s dan upstream line rate 9.95328 Gbit/s.
Split ratio 256 64, 128, 256
Maximum distance 40 km
(Logical: 60 km)
20 km
(Logical: 60 km)
Maximum differential distance 20 km , 40 km
60 km dengan fiber extender
20 km , 40 km
Optical
path
loss
Class N1 : 14- 29dB
Class N2 : 16-31 dB 20 km , 40 km
60 km dengan fiber extender
Class E1: 18-33 dB
Class E2 : 20 -35 dB
Class B+ : 13-28dB
Class C+ : 17-32dB
Class N1 : 14-29dB
Class N2 : 16-31 dB
Class E1: 18-33 dB
Class E2 : 20 -35 dB

Protocol layering (125us per frame)
(125us per frame)
Transmission medium fibre sesuai dengan ITU-T Rec. G.652. [ITU-T G.657] digunakan untuk instalasi gedung/rumah dan drop fibre sesuai dengan [ITU-T G.652]. Type fibre yang compatible [ITU-T G.657] digunakan untuk instalasi gedung/rumah dan drop
Transmission methodology Bidirectional transmission menggunakan teknik WDM pada single fibre. Bidirectional transmission menggunakan teknik wavelength division multiplexing (WDM) pada single fibre.
Line code logic level :
  • high level of light emission for a binary ONE;
  • low level of light emission for a binary ZERO.
Downstream and upstream: NRZ coding.
  • Downstream line coding for 9.95328Gbit/s scrambled NRZ.
  • Downstream line coding for 2.48832Gbit/s scrambled NRZ.
  • Upstream line coding for 2.48832 Gbit/s scrambled NRZ.
  • Upstream line coding for 9.95328 Gbit/s scrambled NRZ for 20 km reach, FFS (For Further Study) for 40 km reach.
logic level :
  • high level of light emission for a binary ONE;
  • low level of light emission for a binary ZERO.
Downstream and upstream: NRZ coding.
Wavelength band Wavelength compatible systems : GPON, RF video, XG-PON1
TWDM PON :
  • Downstream : 1596-1603 nm.
  • Upstream : Wideband option 1524-1544 nm
  • Reduced band option 1528-1540 nm
  • ;Narrow band option 1532-1540 nm
PtP WDM PON :
  • Upstream/downstream : Expanded spectrum 1524-1625 nm (Note 1)
  • Shared spectrum 1603-1625 nm (Note 2)
Downstream : 1575-1580
Upstream : 1260-1280
Scrambling polynomial x58 + x39 + 1 polynomial x58 + x39 + 1
ONU ID 10 bit, 0-1020 ,
  • 1023 (0x3FF) : broadcast message in the downstream direction or an ONU that has not been assigned an ONU-ID in the upstream direction
  • 1021 (0x3FD) and 1022 (0x3FE) are reserved and should not appear as ONU-ID in PLOAM messages
10 bit, ,
  • 0..1020 : assignable
  • 1021 : reversed
  • 1022 : broadcast/reversed
  • 1023 : broadcast/unassigned
Alloc-ID 14 bit, 0 - 16383
  • 0 - 1020 : default
  • 1021 - 1023 : broadcast
  • 1024..16383 : assignable
14 bit, 0 - 16383
  • 0 - 1020 : default
  • 1021 - 1023 : broadcast
  • 1024..16383 : assignable
XGEM port ID 16 bit, 0 - 65535
  • 0..1020 : default
  • 1021..65534 : Assignable
  • 65535 : Idle
16 bit, 0 - 65535
  • 0..1020 : default
  • 1021..65534:Assignable
  • 65535 : Idle
Service mapping Ethernet/ MPLS Ethernet/ MPLS


Referensi
  • Rec. ITU -T Rec. G.989.x
  • Rec. ITU-T G.9807.1

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