osi confidential information gpon: the standard for pon

OSI confidential information

GPON: The Standard for PON Deployment and Service Evolution

Ron HartkemeyerDirector Support ServicesOptical Solutions


Industry Leader More Than 203 Fiber Powered Communities More Than 55,000 Optical Network Terminals

(ONTs) Deployed Shipping More Than 4,000 GPON ONTs Per Month 1st ITU Compliant GPON Product (Shipping Since 2003) 1st IPTV Over PON Deployment in Nation (IPTV Since 2002)

• More Than 90% of the PON IPTV Installs in the World Active Member and Editor of FSAN Standards Committee One of Three Founders of FTTH Council and Presently on the Board of

Directors Significant Patent Portfolio in FTTP Technology

About Optical Solutions

US Optical Fiber CommunitiesUS Optical Fiber Communities FTTH Council Publication May 10th , 2005

OSI Deployed in 51% orOSI Deployed in 51% or203 of 398 communities203 of 398 communities

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US Optical Fiber Communities excluding RBOC deploymentsUS Optical Fiber Communities excluding RBOC deployments FTTH Council Publication May 10th , 2005

Excluding RBOC deployments OSI Deployed Excluding RBOC deployments OSI Deployed in 61% or 203 of 333 communitiesin 61% or 203 of 333 communities

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Standards Based PON Protocols

Standards Bodies That Have Specified PON Protocols

International Telecommunication Union (ITU-T)

Institute of Electrical & Electronics Engineers (IEEE)

Three Fully Ratified PON Protocol Standards Exist

ITU-T Ratified BPON (G.983) & GPON (G.984)

IEEE Ratified EPON (802.3ah)

Non Compliant PONs are Proprietary


Major Members Of Full Service Access Network

(FSAN)

FSAN Recommends Standards to the International Telecommunications Union (ITU)


FiberPath GPON Network

GPON = 25 dB/20km/12.4 Miles

Optical LineTerminals (ONT’s)


Drivers for GPON

Correction of BPON Limitations

Higher Speeds

Scalable to still higher speeds with the on-going decreases in optics costs

Recognition of IP Networking

Evolution From ATM to Pure IP Transport

Platform for All Services Delivery

Video - IPTV or RF

Voice - TDM or VoIP

Data

Platform Designed for Interoperability and lower operations costs

Standards driven interoperability

No Active Powering Points in the access Network(FSAN committee has been working on GPON since mid 2001)


GPON Status and Time Line

G.984.1 – Service Requirements Transport speeds and feeds, tolerances and delays, etc Ratified by ITU-T in 01/03

G.984.2 – PMD – Physical Media Dependent Layer Link budgets by class, split ratios, etc

• Class B ODN – 10dB min to 25 dB Max loss Ratified by ITU-T on 01/03

G.984.3 – TC - Transmission Convergence Layer Transport Protocol Layer 1/04 : ITU-T Approved

G.984.4 – OMCI – ONT Management and Control Interface This specification lays the groundwork for interoperability. 1/05: ITU-T Approval (expected in Q4 2005)


GPON Additions in Work

IPTV over GPON First Specification for standardizing IPTV service

delivery mechanisms and requirements

TDM over a GEM only Transport Establish QoS for TDM traffic in a GEM only Mode


FSAN PON bit rates

Upstream Downstream

155 Mbps 155 Mbps

622 Mbps 622 Mbps

1.2 Gbps 1.2 Gbps

2.4 Gbps 2.4 Gbps

Upstream Downstream

155 Mbps 155 Mbps

622 Mbps 622 Mbps

1.2 Gbps 1.2 Gbps

2.4 Gbps 2.4 Gbps

G.983 BPON framing G.984 GPON framing


ITU-T G.984.2 Physical

Media Dependent Layer

•8.2.1 Digital Signal Nominal Bit RateTransmission Line Rate = Multiple of 8 kHzNominal Line Rates

Downstream = 1244.16 Mbit/s Upstream = 622.08 Mbit/s

•8.2.2.1 Transmission MediumITU-T G.652 Single Mode Fiber

•8.2.5 Operating WavelengthDownstream Wavelength on Single Fiber=1480–1500 nm (FP500 is 1490nm)Upstream Wavelength = 1260 – 1360 nm (FP500 is 1310)

• 8.2.7.1 Attenuation RangeCLASS B = 25 dB

•Table 4-a, Item 7 Maximum Fiber Distance Between S/R & R/S Points

Maximum Fiber Distance Between OLT and ONU – 20km/12.4 miles


ITU-T G.652 Single Mode Fibre

8.2.2.1 Transmission Medium:

Upstream Wavelength Range = 1260 – 1360 nm (FP-500 = 1310 nm)

Downstream Wavelength Range on Single Fibre Systems = 1480 – 1500 nm (FP-500 = 1490 nm)

8.2.5 Operating Wavelength:

CLASS B = 25 dBm

8.2.7.1 Attenuation Range:

Maximum Fibre Distance Between OLT & ONU = 20 km/ 12.4 mi (60km Logical Reach)

Table 4-a – Item #7 Maximum Fibre Distance Between S/R & R/S Points:

Transmission Line Rate = Multiple of 8 kHz

Nominal Line Rates Downstream/Upstream = 1244.16 Mbit/s / 622.08 Mbit/s

8.2.1 Digital Signal Nominal Bit Rate:

ITU-T G.984.2 Physical Media Dependent Layer


ITU-T G.984.3 Transmission

Convergence Layer• 5.3 Multiplexing Architecture Two Multiplexing Mechanisms: ATM and GEM (GPON Encapsulation Mode) Frame can be Mix of ATM or GEM GEM = 10% More Efficient than BPON in Carrying IP Traffic GPON Does not Require 8b/10b Ethernet Encoding Requirement of EPON GPON = 20% More Efficient than EPON in Carrying IP Traffic• 8.1 Downstream Frame Structure 125 Micro-seconds in Length = 8 kHz = Clocking Implicit in Frame


Forward Looking GPON Standards

BPON

GPON

or

155

622

1.2 2.4

• GPON Rated to 2.4 Gigabit Symmetrical• GPON Byte Burst Overhead Increases w/Upstream Speed

• BPON Effectively Limited to 155 Mbps upstream• BPON Fixed 3 Byte Burst Overhead• Turn on times less than 50 ns are high cost


GPON Voice Migration of

Telephony Networks TDM/GR-303 Voice Network

DS1’s used for GR-303 Interface @ OLT VoIP overlay with IAD (Integrated Access

Device)

• IAD is stand-a-lone (inside premises)

• IAD has Ethernet and POTS interface

TDM/GR-303 with VoIP Voice Network DS1’s used for GR-303 interface @ OLT Voice Gateway used to convert calls to VoIP OLT Ethernet interface used for VoIP IAD function is performed by ONT

VoIP Voice Network Ethernet interface at OLT used for all voice

services

GR-303DS1’s

Ethernet

POTS

IAD

Ethernet

IAD POTS Ethernet

IAD POTS Ethernet

GR-303DS1’s

Ethernet

Ethernet

VoiceGatewayEthernet

Standards Speeds and Feeds

Standard Status Official Standards body

Key parameters Comments

Proprietary Designed by manufacturer

None Varies by manufacture

Dead end system

EPON Approved 2004 IEEE 1.2 Gigabits/sec downstream1.2 Gigabits/sec upstream16 way split10 km reach

Ethernet in first mile implementation

BPON Approved 2001(APON version approved 1998)

ITU 622 Mb/s downstream155 Mb/s upstreamRF Video overlay16 and 32 way split20/10 km reach

Strictly an ATM-based protocol (APON) with an RF overlay for video delivery

GPON Approved April 2003 ITU 1.24 or 2.4 Gigabits/sec downstream622 Mb/sec up to 2.4 Gigabits/sec upstreamOptional RF video overlayUp to 64 way split20 km reach

Protocol designed for IP traffic. GPON took the best of EPON and BPON in the development of the standard


Standards Comparison

ITU (GPON) IEEE (P-P & EPON)

Mission/Objective Full Service Access Network (FSAN)

Ethernet in the First Mile (EFM)

Attendees Service Provider focused Enterprise and consumer market focused

Committee Operating Protocol Carriers drive and approve vendors technical recommendations

One person- One vote

Wavelengths Specified Specified

Maximum PON Speeds 2.4 Gb/s 1.25 Gb/s

Bandwidth efficiency Greater than 90% Less than 75%

Attenuation Range 25 dB 24 dB

QoS Specified Left to vendor

Network synchronization Specified Left to vendor

Security Specified Left to vendor


GPON Reach Advantageover EFM

Shorter Link Budgets Limited Design Options

More Actives In OSP

Increased Op Ex $

Less Reliable

GPON = 20km

EFM = 20km REACH

GP

ON

= 4

0 k

m R

EA

CH

EFM = 10km


Standards Comparison

0

200

400

600

800

1000

1200

1400

EPON GPON BPON

Mb/

s

scheduling OH : framedelineation

scheduling OH : PHY burst OH

scheduling OH : controlmessages

payload encapulation OH

line coding

payload

Line Coding OH

PON burst OH


G.983 (BPON) vs G.984 (GPON)

BPON supports only ATM cells GPON supports both ATM and GEM

Generic Encapsulation Mode (GEM) GPON GEM efficiency

Eliminated 8b/10b requirement 20% more efficient than EPON in carrying IP 5-10% more efficient then BPON Long term benefits towards lower cost equipment Support of packet fragmentation

Benefits: Can choose solution that delivers lowest cost over time. Clear migration path to an all IP network


PON Standards - Summary

GPON (G.984) improvements over BPON (G.983) Efficiency: dual mode support of ATM as well as

Ethernet frames Scalability: more economical means of achieving high

speeds Lower costs because of relax timing requirements and

common optics with EPON Supports TDM and Ethernet Interfaces at the OLT

GPON Values Similar Cost points to BPON Architecture/Platform that will migrate with the operator,

without requiring forklift upgrades Standards driven for interoperability


PON Protocol Standards Matter Reliability & Availability Mass Adoption/ Lower Costs/ Greater Flexibility

ITU Is The Dominant Standard GPON is the dominant PON protocol standard

• SBC, BellSouth, Bell Canada, Verizon, International PTTs

• Most Bandwidth = Most Revenue Potential Flexible & Cost Effective Transition to All IP Network

Summary

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