2. Overview of Optical Access Network Analysis of GPON Standards Contents GPON Key Technologies GPON Management and Service Provisioning Basic Concepts of PON Basic Services over GPON Network
3. Basic Concepts of PON This chapter describes the basic concepts and working principle of PON network. After reading it, you will have a preliminary understanding on the PON network. This chapter introduces the basic architecture, upstream and downstream working principle of the PON network.
10. Comparison Between GPON and EPON Ethernet GEM/ATM Data encapsulation mode 8B/10B NRZ Line encoding Pure data service Multi-service/ FTTx Application mode Enterprise Intranet Carriers Choice of carriers Px10/Px20 Class A/B/C Power budget Weak, extended by vendors powerful OAM Small vendors involved Large vendors involved Maturity RTT Equalized logical reach by adjusting EqD Ranging 72% 92% Broadband efficiency Defined by vendors Standard format DBA None OMCI ONT interconnectivity CESoP CESoP / Native TDM support 1:16~1:32 1:64~1:128 Split ration 1.25G/1.25G 2.488G/1.244G Rate IEEE ITU.T Standard EPON GPON
11. Overview of Optical Access Network This chapter describes the architecture of the optical access network. After reading it, you will have a understanding on the FTTx network. Besides, this chapter describes various devices applied in the FTTx network and you can get a knowledge of those devices applied in the optical access network.
12. CO Curb Customer Premise BA FTTC FTTB OLT OLT Architecture of Optical Access Network DSLAM 250-700m Urban Coverage 3.5-5km Remote Business xDSL 2~20Mbps OLT FTTH ODN MDU ONT ONU Optical Line Termination Optical Networks Termination Optical Networks Unit Multi-Dwelling Unit 2.5Gbps Down /1.25Gbps Up 2.5Gbps Down /1.25Gbps Up 2.5Gbps Down /1.25Gbps Up
13. From the architecture diagram, the optical access network comprises the following scenarios: 1. FTTB scenario As an access scenario for business users, Fiber to The Business (FTTB) scenario falls into single business unit (SBU) and Business Multi-tenant unit (MTU) in terms of capacity . Of them, SBU provides a comparatively small number of ports, including following types: POTS, 10/100/1000BASE-T, RF(33dBmV), and DS1/T1/E1 ports; MTU provides a comparatively larger number of ports, including following types: POTS, 10/100/1000BASE-T, RF and DS1/T1/E1 ports. 2. FTTC & FTTCab scenario As an access to the curb or the cabinet over fibre, Fiber to The Curb& Fiber to The Cabinet (FTTC & FTTCab) scenario is for the Multi-dwelling unit (MDU), providing a comparatively larger number of ports, including following types: 10/100/1000BASE-T, RF(33dBmV), VDSL2, and so on. 3. FTTH scenario As an access to the home over fibre, Fiber to The Home (FTTH ) scenario is mainly for the single family unit ( SFU), providing a comparatively small number of ports, including following types: POTS, 10/100/1000BASE-T, and RF(18dBmV). What is Optical Access Network?
14. Analysis of GPON Standards This chapter analyses major GPON standards. After reading it, you will have a understanding on the module reference, performance, frame structure, as well as basic terms of GPON network, such as GEM, port and T-CONT.
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16. GPON Network Model Reference WDM ONU/ONT NE WDM OLT NE Service node Optical splitter T reference point V reference point R/S S/R ODN UNI SNI IFpon IFpon ONU Optical Network Unit ONT Optical Network Terminal ODN Optical Distribution Network OLT Optical Line Terminal WDM Wavelength Division Multiplex Module NE Network Element SNI Service Node Interface UNI User Network Interface
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29. GPON Key Technologies This chapter describes GPON key technologies. After reading it, you will have a understanding on key technologies of GPON, such as ranging, equalization delay (EqD), dynamic bandwidth assignment (DBA), QoS and optical power.
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47. GPON Management and Service Provisioning This chapter describes GPON management and service provisioning. After reading it, you will have a understanding on OMCI ( the management and maintenance message type ) and ONT service implementation.
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50. GPON Service Provisioning and Zero Configuration on Terminals Carriers’ nightmare Application scenario Service Provisioning NMS 2000 Access Network Billing 2 Configure service network 3 Order Management Start up ONT and make registration with serial number ONT ONT ONT ONT CRM User Send terminals to users 1 2 Finish the auto-configuration of OLT Initial configurations (such as service system information configuration, data configuration) are required on terminals and then they can be put into use. To finish these configurations, it is not cost-effective to carriers. GPON supports zero configuration on terminals and plug-and-play of terminals, which is cost-effective. Flexible Configuration plan of GPON STB 3 Use OMCI to finishing data configuration on ONT 1 Subscribe for services
51. VOIP Service Management Solution in GPON SoftX3000 Service Provisioning IADMS Access Network CRM Billing UMS 1 Subscribe for services 2 Configure SoftX 3 Configure IADMS Activation code generator 4 Generating activation code User 5 Send activation code and terminal to users Phone Phone Phone Phone Order Management 6 Input activation code 7 Configure terminals automaticallythroughTR069 Maintenance personnel use activation code generator to generate terminal activation code (including IADMS IP, PPPoE user name and password). Users input activation code on terminals, terminals register on IADMS upon power-up and the IADMS makes auto-configuration on terminals. Basic operation and maintenance process Description Process and Networking ONT ONT Service provisioning Terminal activation Daily management
52. Basic Services over GPON Network This chapter describes basic services provided by GPON System, such as Triple-play, TDM and RF overlay services.
53. ASP/ISP CPE MSE Ethernet OLT Softswitch NMS TL1/CORBA /API BB service platform Carrier’s OSS Notification Triple Play Solution in GPON Phone PC SBU NSP CBU E1 FE ODN Splitter Base station BRAS AAA Server IP Core Internet VoD Server Middle ware IPTV Phone PC SFU CPE MDU VDSL IP Voice
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55. RF Overlay Service Solution in GPON EDFA （ Erbium Doped Fiber Amplifier ） Optical Couplers （ WDM ） OLT (Optical Line Terminal) ONU (Optical Network Terminal) Central Office Video 1550nm Voice/Data& Video 1490/1310nm ， 1550nm Voice/Data Downstream 1490nm Upstream 1490nm Customer Premises Optical Splitter Video （ RF ） IP Voice and Data @1250Mbps Voice and Data @2500Mbps Video Analog TV Digital TV HD/VOD 42Mhz 550Mhz 860Mhz Upstream Downstream 1310nm 1490nm 1550nm
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Notes de l'éditeur
Good morning/afternoon, ladies and gentlemen. I’m very glad to have a chance to introduce GPON technology to you. Huawei provides this solution based on fixed network consolidation and migration. Why will we talk about the fixed network consolidation and migration?
IN brief the EM’s features cover the full FCAPS areas and we of course also provide this functionality both as a GUI and northbound integration capability.
最大逻辑距离：就是不考虑设备本身硬件处理时延，光纤传输时延等因素的情况下的最大传输距离。 最大物理距离：就是实际的传输距离 最大距离差：就是不同的 ONU 距离 OLT 设备的距离差
1.In GPON, downstream frames are transmitted in a broadcast manner with a fixed length of 125us. Same downstream data arrives at all ONUs and then each ONU filters the incoming data based on ONU-ID. 2.In GPON, upstream frames are transmitted in the TDMA manner. The uplink is divided into time slots and the time slots are allocated to ONUs according to the BWmap field in GPON upstream frames. In this way, all ONUs can transmit data in a certain order and no collision occur. Each frame has 9120 time slots. 3.In GPON, T-CONT is introduced to the uplink. T-CONT is a container that carries data, similar to the VC in the SDH. Data are transmitted through the particular T-CONTs. T-CONT eases bandwidth allocation and facilitates dynamic bandwidth
1.In GPON, upstream frame comprises these fields: PLOu, PLOAMu, PLSu, DBRu, and Payload. The following describes the meanings of these fields: PLOu: Physical layer overhead Upstream. It is for frame location, synchronization and identifies which ONU the frame belongs to. PLOAMu: The PLOAMu field reports maintenance and management status of ONUs. (Not all frames contains this field. Whether to send the field is negotiable.) DBRu: The DBRu field mainly reports the status of T-CONTs. To apply for bandwidth for the next, the field completes the dynamic bandwidth assignment to ONUs. (Not all frames contains this field. Whether to send the field is negotiable.) Payload: The payload of the data. It could be either DBA status report or data frame. If it is the data frame, it consists of GEM header and Frame. GEM header: The GEM header identifies data of different GEM ports. GEM port is the minimum unit for transmitting data in GPON, similar to the PVC in the ATM. Each type of service traffic corresponds to GEM ports, and the GEM port corresponds to T-CONTs. GEM header is divided into PLI, Port ID, PTI and HEC. The meanings of theses parts are as follows: PLI: it indicates the length of the payload. Port ID: it uniquely indicates a GEM port. PTI: it identifies the payload type, mainly identifying the status and type of the data that is currently being sent, such as whether it is the OAM message, or whether the data is transmitted completely. HEC: It provides Forward Error Correction (FEC) and ensures transmission quality.
In GPON, downstream frame comprises PCBd and Payload fields. The PCBd is mainly the physical control block, providing frame location, synchronization and bandwidth allocation functions. The Payload is mainly used for loading downstream data. Each frame may consists multiple units. PCBd: It contains the synchronization field, identifying whether to enable the FEC algorithm. The PCBd field is mainly used for the upstream bandwidth allocation to enhance the bandwidth utilization. Of the US BW Map field, AllocID identifies the serial number of T-CONTs; SStart and SStop indicates the number of time slots for starting and stopping transmission respectively; CRC is the parity bit.
in 2004, Huawei cooperate with NEUF telecom in France establish world’s first commercial triple play network, which by now, is becoming world’s biggest triple play network provide multi-service for 1,700, 000 customers. In 2006, reference to this successful application, DSL Forum publish it’s TR-101, try to standardize the triple play service.
That’s all for my presentation, any questions is welcome.
