EPON vs GPON
www.huawei.com
HUAWEI TECHNOLOGIES CO., LTD.
Page 1
HUAWEI TECHNOLOGIES CO., LTD.
Agenda EPON vs GPON Economics Analysis of EPON and GPON
HUAWEI TECHNOLOGIES CO., LTD.
Page 2
EPON vs GPON in Technologies Technology
EPON
GPON
US
1250M
1250M
DS
1250M
2500M
Line Code
8B/10B
NRZ
Layer 2
Ethernet
ATM/GEM
US
760M
1160M
DS
900M
2300M
Bandwidth Efficiency
0.72
0.93
TDM Support
TDM Over IP
TDM over IP/ TDM over ATM/ TDM over GEM
Max Transmission Distance
10km/20km
20km
Max Splitting Rate
1:32/1:16
1:64/1:128
OAM&P
Ethernet OAM (plus optional SNMP)
PL OAM and OMCI
Security
Not Defined
AES (mandatory)
Interoperation
Not Defined
FSAN and ITU-T
Max Bandwidth (bps)
Protocol
Efficient Bandwidth (bps)
• •
GPON is better than EPON in bandwidth , encapsulation efficiency, multi-service support, splitting rate and OAM GPON is more suitable in telecom networks which care about operation and maintenance, interoperation, security and so on. HUAWEI TECHNOLOGIES CO., LTD.
Page 3
GPON with Better Support of Multi-service and Higher Efficiency Voice
Data
TDME1
Voice Video
Data
TDME1
Video
VoIP
VoIP TCP+UDP etc. IP Ethernet AAL1/AAL2
AAL5
GEM Frame AES (Optional)
AES (Mandatory)
PON-PHY
PON-PHY
EPON •
• •
GPON
EPON is introduced by IEEE based on modified MAC and RS sub-layer Ethernet technology, EPON technology is quite simple and similar with standard LAN switch in service carrying structure and suitable for pure data transmission. The ranging , time recovery and synchronization requirement of EPON is lower , so the optical module and CDR device is cheaper , but which also cause higher overhead redundancy required. EPON adopts 8B/10B coding which cause 20% efficiency loss in physical layer, while GPON uses NRZ coding without loss
HUAWEI TECHNOLOGIES CO., LTD.
Page 4
GPON with More Complete Standard GPON
EPON
Object
FSAN: Full-service support FSAN
The last kilometer Ethernet of EFM
Operating method
Technical specification of equipment driven and
Popular Ethernet equipment provider
approved by telecom operators Wavelength
Defined
Defined
Coverage area
Defined
Defined
QoS
Defined
Defined by equipment provider
Network delay
Defined
Defined by equipment provider
Management and
Defined
Defined by equipment provider
Defined
Defined by equipment provider
maintenance Security
• •
GPON standard defined by operators with more complete consideration in telecom service . EPON standard is defined by some of the equipment providers. The standard focuses on physical specification and needs subsequent definition by other equipment providers, with cause difficulties in interoperation.
HUAWEI TECHNOLOGIES CO., LTD.
Page 5
GPON with More Mature Industrial Chain •
Mainstream Chip Producer has devoted to GPON, such as BRCM, CTLM, Broadlight.
•
Mainstream broadband access equipment producer has devoted to GPON, such as Huawei, Alcatel, Siemens, Ericsson, Motorola, Lucent Hitachi and so on .
•
GPON gets widely support from global TOP operators including RBOCs, BT, FT, TI, Telefonica, Etisalat, Telmex, Singtel , Telstra;
•
FSAN fully supports and organizes the interoperability test and authentication: – Physical interoperability test in May 2006 – Service interoperability test in September 2006
HUAWEI TECHNOLOGIES CO., LTD.
Page 6
GPON -- Choice of Global Mainstream Operators Country/Region
Operator
Chosen technology
Tender Time
US
Verizon
GPON
2006Q3
US
South Bell
GPON
2006Q3
US
SBC
GPON
2006Q3
UK
BT
GPON
France
FT
GPON
Netherlands
KPN
P2P/GPON
Italy
TI
GPON
Spain
Telefonica
GPON
2006Q2
the United Arab Emirates
Etisalat
GPON
2006Q3
Pan-Latin-America
TLATAM (Telefonica LA)
GPON
2006Q2
Mexico
Telmex
GPON
Singtel
Telecom
GPON
Australia
Telstra
GPON
Japan
NTT
EPON
HUAWEI TECHNOLOGIES CO., LTD.
2006Q3
Page 7
Agenda EPON vs GPON Economics Analysis of EPON and GPON
HUAWEI TECHNOLOGIES CO., LTD.
Page 8
GPON vs EPON Cost Analysis GPON/EPON
•Application Scenario: •10000 FTTH users •100% line bandwidth loading
OLT ONT
10000 Subs •Assumption: •Comparison between EPON and GPON CO equipment and ONT only , ODN is supposed equalized in cost although splitting ratio might be different. •Cost of EPON and GPON Equipment and ONT EPON OLT=GPON OLT=1800 US EPON ONT=GPON ONT=100 US Note: GPON OLT and ONT price surely are higher than EPON , but so far there is no commercialized reference price, so here it is just supposed they are equal and let’s see what will happen
Efficient Bandwidth
DS bandwidth (Mbps)
US bandwidth (Mbps)
DS Efficiency
EPON
1250
1250
GPON
2500
1250
HUAWEI TECHNOLOGIES CO., LTD.
DS Efficient BW (Mbps)
Splitting Rate
Transmission Distance
72%
900
32
10km
93%
2300
64
10km
Page 9
GPON vs EPON in OLT Price The following figure shows the cost difference of EPON and GPON , figure 1 is for total cost of network equipment, figure 2 is for cost per subscriber
•Figure 1 Total equipment and terminal cost
•
•Figure 2 Cost per subscriber
GPON cost advantages are from the reduction of OLT Qty, because GPON has higher DS bandwidth , splitting rate and bandwidth efficiency
HUAWEI TECHNOLOGIES CO., LTD.
Page 10
GPON vs EPON in ONT Price Sensitivity Indicated by following table the comparison of EPON and GPON implementation, GPON can obtain Qty advantage by 1:2.6, which also means 1.2 million US saving. BW/Subscriber (Mbps)
10
20
30
40
50
60
70
80
90
100
EPON OLT Qty
313
313
334
455
556
667
834
910
1000
1112
GPON OLT Qty
157
157
157
176
218
264
313
358
400
435
Qty comparison Ratio (1: )
2.0
2.0
2.1
2.6
2.6
2.5
2.7
2.5
2.5
2.6
•Table 1 EPON and GPON implementation
• •
Considering the GPON OLT saving, the GPON ONT cost sensitivity could be calculated , then applied to the ONTs in the networks. For example , in case 100 Mbps per subscriber , 1.2 million US saving could be distributed into 10000 ONTs , then to equalize the cost difference of EPON ONT and GPON ONT.
HUAWEI TECHNOLOGIES CO., LTD.
Page 11
How much can GPON Price Higher than EPON
According previous calculation , It could be obtained how much can GPON equipment price higher than EPON. The following figures shows the GPON price sensitivity (mark up part) compared with EPON:
•Figure 3 GPON ONT Mark up
• •
•Figure 4 GPON OLT Mark up
It is indicated in the same network situation , GPON ONT can bear 120 US higher per subscriber (could reach to 220 US, or 120% higher) GPON OLT can bear 4500 US higher than EPON per site HUAWEI TECHNOLOGIES CO., LTD.
Page 12
Summary •
EPON equipment unit price is low due to its easy way technology realization and lower requirement of optical device.
•
But from previous analysis , it is clearly indicated GPON possess of very cost effective in a concept of whole network , especially in large scale and high bandwidth per subscriber FTTH network, which owe to GPON’s higher splitting rate, max bandwidth and efficient bandwidth , those advantages lead to half reduction of OLT qty.
•
Less OLT means less site space and power consumption , besides the equipment life circle cost could also be reduced.
HUAWEI TECHNOLOGIES CO., LTD.
Page 13
Thank you！
HUAWEI TECHNOLOGIES CO., LTD.
Page 14
