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1、FTTH Technologies in KoreaFTTH Technologies in KoreaSep. 13, 2005Kim, Byoung-Whi Yu, Jea-HoonOptical Communications Research CenterSep. 13, 2005Kim, Byoung-Whi Yu, Jea-HoonOptical Communications Research Center22005 Symposium on Optical Cable and Cable CICAbout ETRIAbout ETRI? Government-funded Rese
2、arch Institute ? Established in December, 1976 ? R It will be relieved to laying either an optical or a coaxial cable162005 Symposium on Optical Cable and Cable CICFTTH Plans by Telco and OthersFTTH Plans by Telco and Others? KT once announced the plan to deploy 1.75 million by 2009, but recently be
3、came more aggressive in FTTH deployment?deploying 17,000 lines in 2005 (8,000 lines to the initial plan)?deploying 200,000 lines in 2006 (119,000 to the initial plan)? Hanaro and Dacom are deploying AON in 2005 and plan to start a full-scale FTTH deployment in 2006?Installing AON for the existing ap
4、artment to prevent its subscribers from turning away to other network providers.?doing the FTTH trial service project, and plans to start a full-scale commercial service from 2006 ? Local Governments?Gwangju city plans to provide 20,000 subscribers with FTTH services by 2008?Other municipal governme
5、nts including Busan, Incheon, Suwan announced “U-city plan” that FTTH is taken as the fundamental access infrastructure172005 Symposium on Optical Cable and Cable CICFTTH System RequirementsFTTH System Requirements? The requirements for the FTTH access system under IP-based multi-service environment
6、s are not fully established yet ? Target services with FTTH?Video phone(multimedia communication), VoIP: service quality guarantee ?ICoD (IP-TV, EoD, VoD, etc) service: bandwidth and service guarantee ? System functions in general?QoS per flow/service/path, OAM & protection, IPv6, MulticastingTermin
7、alAggregation SwitchAggregation DeviceService EdgeMetro SwitchEdgeCore? Resource Reservation Edge-to-Edge ? QoS Flow, path, class ? OAM Link, MPLS ? Link protection ?Statistics Per link,LSP path ? Scheduler Class Connection/Session? Resource Reservation Per hop or end-to-end ? QoS Flow, path, class
8、? OAM Link, VLAN or MPLS ? Link protection VLAN/MPLS protection ? Statistics Per Service/link, VLAN/LSP path ? Scheduler Class FTTH access networkFTTH access network182005 Symposium on Optical Cable and Cable CICE-PON System E-PON System ? TDMA Protocol: Multi-Point Control Protocol (IEEE802.3 claus
9、e 64) ? EPON Logical Link (IEEE802.3 clause 65) ? EPON PMD : 1000BASE-PX10, 1000BASE-PX20 (IEEE802.3 clause 60) ? Link OAM (IEEE802.3 clause 57) ? Link Security : IEEE802.1ae (MACsec), IEEE802.1af (key management)192005 Symposium on Optical Cable and Cable CICE-PON up/down LinkE-PON up/down Link Dow
10、nstream1.25Gb/s: Ethernet Frame (641522octets) + EPON preamble(8 octets) : idle patterns in Interframe Gap ( 12 octets)Guard Time(Bit, time-stamp synchronization are required) Upstream1.25Gb/sBurst frames from ONU #iBurst frames from ONU #j202005 Symposium on Optical Cable and Cable CICE-PON OTRxE-P
11、ON OTRxValid FrameValid FrameEthernet preambleTurn-on TimeTurn-off Time-5 dBm ? SMSR 30 dB ? Tuning Range 14 nm1546154815501552155415561558-40-35-30-25-20-15-10-50optical power dBmwavelength nm#9-131546154815501552155415561558-40-35-30-25-20-15-10-50optical power dBmwavelength nm#9-13#9 13After 20 k
12、m 1557.24 nm1558.15 nmDevice temperature: 13.1 oCBias : 60 mA ER : about 8 dB#9 13After 20 km 1557.24 nm1558.15 nmDevice temperature: 13.1 oCBias : 60 mA ER : about 8 dB? Wavelength Tunable? TransmissionPLC-ECL : Preliminary Results (1.25Gbps, 20km transmission)PLC-ECL : Preliminary Results (1.25Gbp
13、s, 20km transmission)352005 Symposium on Optical Cable and Cable CIC Link structure Central Office Amplitude SqueezingSML PDR-SOA PD0 1 0 1 0Saturation pointINPUT POWEROUPUT POWERDown streamSaturated Down streamModulated Up streamReflective WDM-PON (R-PON) with RSOAReflective WDM-PON (R-PON) with RS
14、OA362005 Symposium on Optical Cable and Cable CICAmplitude SqueezingAmplitude Squeezing3dBsaturation gaininput saturation power2. amplitude squeezing by gain saturation3. direct modulation of RSOA (1.25Gbps)1. Input downstream signal (1.25Gbps)4. output remodulated upstream (1.25Gbps)372005 Symposiu
15、m on Optical Cable and Cable CICR-PON Preliminary ResultsR-PON Preliminary ResultsCW 3 dB 4 dB 5 dBDownstream Extinction Ratio?BER with 1.25Gb/s downstream ER ?Upstream is directly modulated? Input power of down stream: 10dBm ? down stream speed: 1.25Gb/s ? distance: 20km ? Input power of down strea
16、m: 10dBm ? down stream speed: 1.25Gb/s ? distance: 20km Eye Diagrams Eye Diagrams RSOA chipDownUpEye Diagram382005 Symposium on Optical Cable and Cable CICCable TVVideo CameraL2/L3 SwitchWDM MUX & DeMUXPLC-ECLRSOAOLT OTRxWDM Link OAM20 km FiberPLC-ECLPLC-ECL UserRSOA User 1.25 Gbps1.25 GbpsWDM MUX & DeMUXOLTOLTONTsONTsONUsT-PON (PLC-ECL)T-PON (PLC-ECL)R-PON (RSOA)R-PON (RSOA)WDM-PON Testbed (2004)WDM-PON Testbed
