Friday, December 16, 2016

Teknologi GPON dan XGPON

Tabel berikut merupakan persamaan dan perbedaan antara GPON dan XGPON


Attribut GPON XGPON
Standard G.984.x G.987.x
Nominal line rate 2.48832 Gbps D/S
1.24416 Gbps U/S
9.95328 Gbps D/S
2.48832 Gbps U/S
Split ratio 32/64/128 ≥64
Maximum distance 20 km
(Logical: 60 km)
≥ 20 km
(Logical: ≥ 60 km)
Maximum differential distance 20 km sampai dengan 40 km
Optical power budget ClassB: 10- 25dB
Class B+: 13-28dB
ClassC: 15-30dB
 ClassC+: 17-32dB
N1(14 – 29dB)
N2(16 – 31dB)
Extend to 33/35dB
Protocol layering DS:38880 Byte, US:19440 Byte
(125us per frame)
DS:155520 Byte, US:38880 Byte
(125us per frame)
Transmission medium fibre sesuai dengan ITU-T Rec. G.652. 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 : teknik wavelength division multiplexing (WDM) pada single fibre, atau unidirectional transmission over two fibres Bidirectional transmission menggunakan wavelength division multiplexing (WDM) technique on a 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.
 logic levels :
– high level of light emission for a binary ONE;
– low level of light emission for a binary ZERO.
Downstream line coding for XG-PON1: NRZ.
Upstream line coding for XG-PON1: NRZ.
Operating wavelength downstream
- single fibre systems : 1480 -1500 nm.
- two fibre systems : 1260-1360 nm.
Upstream : 1260-1360 nm.
Downstream : 1575-1580 nm
Upstream : 1260-1280 nm
Scrambling 8 bit scrambler:
polynomial x7 + x6 + 1
58 bit scrambler:
polynomial x58 + x39 + 1
ONU ID 8 bit, 0 - 253,
254 dan 255 cadangan
10 bit, 0 - 1021,
1022 dan 1023 cadangan
Alloc-ID 12 bit, 0 - 4095 14 bit, 0 - 16383
GEM port ID 12 bit, 0 - 4095 16 bit, 0 - 65535
Service mapping Native TDM/ Ethernet/ IP/MPLS /SDH Ethernet/ MPLS


Referensi
  • Rec. ITU -T Rec. G.984.2 (03/2003)
  • Rec. ITU-T G.987.2 (01/2010)
  • Materi Training Huawei GPON Operation and Maintenance

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