NBN Co Network Design Rules

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NBN Co Network Design Rules Table of Tables Table 1 Summary of fibre & connector types used in the network .......................................................................... 7 Table 2 Fibre Standards Reference Code .................................................................................................................... 8 Table 3 MDU Classifications ...................................................................................................................................... 13 Table 4 MDU Fibre Allocation: .................................................................................................................................. 13 Table 5 12 FDH FSAM Fibre Requirements per FDH................................................................................................ 16 Table 6 Maximum Optical Loss ................................................................................................................................. 18 Table 7 Preliminary RF Spectrum Plan ..................................................................................................................... 29 Table 8 Acronyms, Terms and Definitions ............................................................................................................... 46 Table of Figures Figure 1 Target High Level Architecture Context Diagram ....................................................................................... 3 Figure 2 Focus of this Document ................................................................................................................................ 3 Figure 3 Ribbon Fibre................................................................................................................................................... 6 Figure 4 Connector and Multi-port Connections....................................................................................................... 6 Figure 5 Traffic paths available when failure occurs ................................................................................................. 9 Figure 6 Traffic paths available when failure occurs on return spur...................................................................... 10 Figure 7 FDH PON Connection .................................................................................................................................. 11 Figure 8 Fibre Distribution Area................................................................................................................................ 14 Figure 9 Fibre Serving Area Module Example .......................................................................................................... 15 Figure 10 16 X FSAM Distribution Cable Connectivity............................................................................................. 15 Figure 11 12 X FSAM Distribution Cable Connectivity............................................................................................. 16 Figure 12 Fibre Serving Area (FSA)............................................................................................................................ 17 Figure 13 Point to Point Connection using DFN ...................................................................................................... 19 Figure 14 High level interconnection block diagram of Wireless Access ............................................................... 20 Figure 15 Microwave Transport Design ................................................................................................................... 23 Figure 16 Wireless Serving Area Module ................................................................................................................. 25 Figure 17 Wireless Serving Area ............................................................................................................................... 25 Figure 18 High level interconnection block diagram of Satellite Access ............................................................... 26 Figure 19 Preliminary Design of User Spot Beams .................................................................................................. 28 Figure 20 Basic DWDM physical connectivity scenarios ......................................................................................... 31 Figure 21 Standalone physical rings ......................................................................................................................... 33 Figure 22 Examples of redundancy in the DWDM network ................................................................................... 33 Figure 23 Overlapping physical rings ........................................................................................................................ 34 Figure 26 Point-to-point spur links ........................................................................................................................... 35 Figure 27 Point-to-point standalone links ................................................................................................................ 35 Figure 28 Fibre access transit .................................................................................................................................... 36 Figure 29 Unprotected Greenfields fibre access transit ......................................................................................... 36 Figure 30 Wireless access transit .............................................................................................................................. 37 Figure 31 Aggregation Domain interfaces on the EAS ............................................................................................ 39 Figure 32 Aggregation Domain interfaces on the EFS ............................................................................................. 40 Figure 33 E-NNI Mode A connection model from an Access Seeker Provider Edge (AS PE) ................................ 41 Figure 34 E-NNI Mode B connection model from a single AS PE ........................................................................... 41 Figure 35 E-NNI Mode B connection model from two AS PEs ................................................................................ 41 Figure 36 Aggregation Domain interfaces on the ECS............................................................................................. 42 Figure 37 Two tier aggregation architecture ........................................................................................................... 43 Figure 38 One tier aggregation architecture ........................................................................................................... 44 iii
NBN Co Network Design Rules 1 Introduction This document provides an overview of the current physical network architecture and high level design of NBN Co’s network and network components. It describes the high level solution that has been developed by NBN Co to comply with the coverage objectives established by the Government’s Statement of Expectations: The Government expects that NBN Co will design, build and operate a new NBN to provide access to high speed broadband to all Australian premises. The Government's objective for NBN Co is to connect 93 per cent of Australian homes, schools and businesses with fibre-to-the-premises technology providing broadband speeds of up to 100 megabits per second, with a minimum fibre coverage obligation of 90 per cent of Australian premises. All remaining premises will be served by a combination of next generation fixed wireless and satellite technologies providing peak speeds of at least 12 megabits per second. 1 This document is provided with NBN Co’s Special Access (‘the SAU’), and is the document referred to in the SAU as the Network Design Rules. This version of the Network Design Rules addresses the fibre GPON, TD-LTE Wireless, Transport and Aggregation network domains. An indicative view of the Satellite Access network design is also provided. It is intended that the final satellite network designs, along with other aspects of the NBN Co network will be provided to the ACCC as soon as they are available. 2 Purpose This document is intended to be read together with NBN Co’s Special Access Undertaking (SAU). These Network Design Rules will be provided to the ACCC as part of its assessment of the reasonableness of NBN Co’s SAU. NBN Co’s objective is to provide certainty with respect to the capital expenditure it may incur in relation to the design of the NBN, but also to provide an appropriate degree of flexibility. If the SAU is accepted, these Network Design Rules will provide a baseline design in the Initial Regulatory Period of the SAU for the NBN Co fibre, satellite and wireless networks in respect of which NBN Co may incur capital expenditure, and recover it over time through the Long Term Revenue Constraint Methodology, provided that NBN Co also meets the Prudent Cost Condition, as specified in the SAU, in respect of that capital expenditure. The process for varying or enhancing NBN Co’s network design which is beyond the scope of these Network Design Rules is separately set out in Module 1 of the SAU (Schedule 1E). On completion of the process for variation or enhancement of the network design, NBN Co will be required to update these Network Design Rules accordingly. During the Subsequent Regulatory Period of the SAU, the Network Design Rules will be one of the factors which will be had regard to in the preparation and assessment of NBN Co’s forecasts of capex and opex, and while not playing the same role as in Module 1, will continue be updated by NBN Co. 1 Statement of Expectations, 17 December 2010, p.1. 1
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