Multiformat Home Networks using Silica Fibres

Transcription

1 Multiformat Home Networks using Silica Fibres Orange Labs Ph. Guignard, J. Guillory, Ph. Chanclou, A. Pizzinat, O. Bouffant, N. Evanno, J. Etrillard, B. Charbonnier, S. Gosselin, L. Guillo, F. Richard. Orange Labs, 2 Avenue Pierre Marzin Lannion, France. Symposium on Indoor Networks: a Promising Way to Converged Service Delivery Monday, September 17, 2012

2 Evolution of the Home Network Customer needs: high bit rate + heterogeneity + simplicity Fiber has already entered the home: Deployment of Fiber To The Home (FTTH) in the access network First domestic optical solutions based on POF (100 Mbit/s today, efforts towards1 Gbit/s) First challenge: increasing the bit rate for IP services today: 100 Mbit/s delivered by FTTH solutions 1Gbit/s Ethernet interconnection between customer devices 10 Gbit/s soon: emerging multiprotocol 10 Gbit/s (as Thunderbolt TM interface from Intel ) 2nd issue: taking signal heterogeneity into account In addition to IP services, the HN has to support various signals other digital baseband signals: related to video (HDMI, SDI) or computers ( USB3, future multiprotocol interfaces) analogue signals (OFDM): terrestrial, satellite, cable broadcasted, Radio Frequency (RF) signals for wireless connectivity 2

3 Towards a Multiformat Home Network Today, all these signals require separated specific networks => complex situation not acceptable for the customer! The solution: convergence of all services on one single infrastructure Strong requirements for the medium which will be used: ability to face further bit rate evolutions: guaranteed if the medium provides bandwidth reserves for future needs possibility to manage signal heterogeneity: the medium must be able to multiplex various high bandwidth signals (requirements on linearity, noise ) 3

4 A Multiformat Home Network based on Silica Fibre Which fibre for the Multiformat Home Network? PMMA SI POF: Efficient for P2P digital links, Do It Yourself (DIY), but too limited performances for a multiformat HN (bandwidth, attenuation) GI POF: improved performances, but still limited for a medium being installed in the walls for decades, DIY is not proven, no market today MMF: performances compatible with multiformat option, large deployments in buildings, low cost systems, not DIY SMF: quasi-unlimited capacity, deployed technology from the core to the access, not DIY A "2-level" Home Network: Access network Ethernet Terrestrial backbone Terminal connectivities the optical backbone is based on Silica fibre (MMF or SMF), installed in the walls by a person "skilled in the art" Gateway Ethernet Wireless connectivity final link from the backbone termination to the customer devices use easy to install connectivities (POF, Ethernet cable, cable, Wireless ) this option allows using "legacy" devices, with no mandatory interfaces imposed by the backbone technology { Ext Ext Ethernet Eth cable POF cable Wireless Ext backbone Ext oip Ext DVB Satellite Extender (backbone termination) 4

5 A first architecture: the Multiformat Active Star Home Network An evolution from the today monoformat Ethernet active star to a Multiformat configuration All the signals converge to a Multiformat Switch (MS) Signals are multiplexed in the MS point-to-point multiformat links carrying the multiplex connect the MS to remote extenders (Ext), located in each room Demultiplexing is achieved by each Ext, delivering all services using the best suited interface for each type of signal all services simultaneously available in each room 2 options for «MS - Extenders» links: Terrestrial Satellite Multiplexing all the services in the electrical domain before optical transmission Combining optical and electrical multiplexing Access network Ethernet RoF Bus for Wireless MS (Multiformat Switch) Access network Multiformat links Ext (extender) Eth data room j room i room k oip DVB Wireless connectivity 5

6 Multiformat Active Star architecture: electrical multiplexing The different types of signals are Electrically Multiplexed The simplest solution if no spectrum overlapping The electrical multiplex directly modulates the laser current Ethernet bit rate: limited to 100 Mbit/s (to avoid overlapping with terrestrial ) Fast Ethernet Terrestrial Satellite Radio for Wireless MS PD Fast Ethernet Ext Terrestrial Satellite Radio for Wireless 1Gbps Ethernet overlapping with Fast Eth. Terrestrial 60GHz Radio at IF Satellite f (MHz) st prototype with: Ethernet 100 Mbit/s Terrestrial UWB (low band, GHz) Multimode Fibre Multiformat switch Extender 6

7 Multiformat Active Star: hybrid optical/electrical multiplexing multiplexing is necessary when electrical spectrum ovelapping occurs Several implementation schemes, depending on: the delivered services and their specific requirements the number of wavelengths while keeping a reasonable cost One possible simple and evolutive solution: one fibre for bidirectional Ethernet, one fibre for a multiplex of additional signals Allow simple implementation of 1 Gbit/s Eth, and easy evolution towards10 Gbit/s Eth l 3 and l 4 may be identical to l 1 and l 2 in a bifibre configuration, but single fibre configuration also possible Gb Ethernet Electrical Mux Terrestrial Satellite Radio for wireless connectivity PD Mux/ Demux PD l 1 l 3 l 2 l 4 PD Mux/ Demux PD Gb Ethernet Electrical Demux Terrestrial Satellite Radio for wireless connectivity 1 port of the Multiformat Switch Extender The MS is a blocking point for optical signals: the number of implemented wavelengths must be limited to avoid multiple E/O and O/E conversions! 7

8 Multiformat Active Star architecture with optical multiplexing Terrestrial RF 8 ports GbE Switch Multiformat Switch E/O conversion RF Tx optical RF Port 5 GbE + RF Port 6 GbE + RF Port 7 GbE + RF Port 8 single fibre GbE + RF A demonstrated implementation scheme: Extenders Rx Rx Rx Rx Coax or F Coax or F Coax or F Coax or F 1 Gbit/s Ethernet + Terrestrial replication of optical Terrestrial signal 3 wavelengths to allow a monofibre implementation bi- and monofibre implementation with MMF have been demonstrated l 1 (1,5 µm) Gb Eth Gb Ethernet Terrestrial PhD (1,3 / 1,5 µm) RF Tx l 3 l 2 (1,3 µm) l 1 l 2 l 3 (850 nm) (1,3 / 1,5 µm) Rx RF Gb Ethernet Terrestrial Gb Eth 1 port of Multiformat Switch Remote Extender Prototype with 1 Gbit/s Eth + Terrestrial Gb Ethernet (1,3 / 1,5 µm) Terrestrial (0,8 µm) Terrestrial 1 port of Multiformat Switch Remote Extender 8 PhD bidir Mux/ Demux l 1 (1,5 µm) l 2 (1,3 µm) l 3 (850 nm) Mux/ Demux Gb Ethernet (1,3 / 1,5 µm) (0,8 µm)

9 A longer term architecture: the Multiformat Passive Star In the future, a transparent fibre infrastructure will be preferred: outlet Room 1 Tx Rx To make possible the increase of the required number of wavelengths (the MS is a blocking point for wavelengths) To avoid the implementation of several O/E and E/O conversions in the active Multiformat Switch To allow a great evolutivity and flexibility due to easy network reconfiguration The most efficient solution is then the passive star, centred on a splitter Room 3 Tx Rx Tx Rx optical splitter An passive CWDM Broadcast & Select infrastructure λ2 λ1 λ4 λ3 Home Area Network λ5 λ6 Access Network a passive & transparent architecture + CWDM technologies for implementation of applications = Multiformat & multitopology architecture add & drop filter to cascaded Σλ devices λ1 Σλ-λ1 λ2 λk, λp from cascaded λ2 devices λ1 λ2 + λk, λp Rx Tx Room 2 Add & Drop filters may be cascaded at each optical outlet to connect to several services in each room Injection of services possible at any point of the network! 9

10 1305 nm 1370 nm 1390 nm 1450 nm 1510 nm 1530 nm 1546 nm et 1547 nm 1570 nm 1610 nm LAN CSMA/CD Pt2Pt GbE Pt2Pt Fast Eth Déport PON (downstr.) RoF, sens 1&2 PON upstream Pt2Pt Fast Eth Multiformat Passive Star architecture: demonstrated with SMF Applications with 16x16 splitter Access network access R-OLT ONT Garage RoF LAN-like l7, l P2P PON-like Kitchen / Dining Living room room l5, l l1, l2 Study Bedroom 1 l4 l3 Bedroom 2 Bedroom 3 Several applications running simultaneously: PON TDMA 2.5 / 1.25 Gbit/s LAN CSMA/CD 100 Mbit/s P2P 1 Gbit/s Eth, P2P 100Mbit/s Eth Terrestrial RoF (UWB) Each application validated in CWDM environment All active and passive components available with SMF technology Demonstration for ALPHA european project 16x16 optical splitter Cascaded Add & Drop filters 10

11 Multiformat Passive Star : implementation with MMF Demonstration with a 8x8 splitter Running applications: CSMA/CD LAN at 100 Mbit/s, Terrestrial, P2P SDI, P2P 1 Gbit/s Eth, PON (2.5/1.25 Gbit/s) But important issues to be solved: Difficulties to find CWDM multimode sources Use of sources developed for SMF Uniformity at the outputs of the splitter is strongly affected if modal repartition is not uniform Best results obtained with VCSELs HDMI l7 RF SDI PCI card HG (HN-OLT) 2 l6 l4 l3 l3 l2 l1 5 l5 l 4 l Pasive optical splitter l l l RF l7 l6 SDI l5 l4 l3 RF PCI card l3 HDMI DVD player 3 l3 PCI card l1 HN- ONT l2 l2 HN- ONT 1 l1 Radio Frequency Media Converter filter Compatibility CWDM + multimode coupler? 11

12 Conclusion Today, single format active star (all IP) is sufficient but will be quickly limited Evolution of services and signals inside the home Several signals today on separated physical networks (IP services, terrestrial or satellite broadcasted, Radio Frequency (RF) signals ) new signals type like HDMI, DVB, 60 GHz wireless, new multiprotocol high speed interfaces Two multiformat architectures have been identified and demonstrated a short-middle term option: the multiformat active star (compatible with MMF or SMF) a longer term option, providing more capacity and flexibility : the multiformat passive star (demonstrated in SMF, compatibility with MMF has still to be proven) a bifibre cabling allows an easy migration between the two architectures Choice of fibre not so simple for a future-proof infrastructure SMF fibre is now at customer side (FTTH), in all parts of the network (core, metropolitan, access, also in buildings), and is compatible with all architectures MMF is also widely deployed in buildings (LANs), with lower system costs. Its compatibility with the WDM passive star is not today proven (needs for suitable components) This work was partly supported by the European FP7 ICT ALPHA and the FUI-ORIGIN & ANR-TEOT projects, and will be carried on in the frame of the RO French FUI project, started in January