ITU/BDT Regional ITU/BDT Regional Seminar Seminar on on Costs and Tariffs for Member Countries Costs and Tariffs for Member Countries of the Tariff Group for Africa (TAF) (TAF) of the Tariff Group for Africa Midrand, South Africa, , South Africa, Midrand 28 June- 28 June -1 July 2005 1 July 2005 Migration towards NGN Oscar González Soto ITU Consultant Expert Strategic Planning and Assessment - slide 1 June 2005 ITU/BDT Migration towards NGN - O.G.S.
Migration towards towards NGN NGN Migration Content Content • Key factors for the evolution towards NGN • Services and revenue motivations. • Network architecture consolidation at transit, local and access levels • Topology and migration • Network optimization based on planning methods and tools • Support to Network Design - slide 2 June 2005 ITU/BDT Migration towards NGN - O.G.S.
towards NGN NGN Network Architecture towards Network Architecture Key Factors: Motivation Key Factors: Motivation • New services and revenue increase with multimedia services: - Compensate voice revenue reduction and increase BB related business • Cost reductions by sharing network infrastructure and systems - Savings are a function of network scenario, equipment modernization status and customers grow speed • Simplification of O&M , thus lowering OPEX - Integrated operation platforms, maintenance and training - slide 3 June 2005 ITU/BDT Migration towards NGN - O.G.S.
Network Architecture towards towards NGN NGN Network Architecture Key Factors: Issues to care Key Factors: Issues to care • Ensure service and business continuity for existing customers. • Introduction of new services based on profitability • Interworking with existing PSTN and other operator's networks • QoS for guaranteed services and critical business customers • Tariff principles as a function of market demand and consumption of network resources (Backward Cost Assignment) • Universal Service Obligations for basic services and internet - slide 4 June 2005 ITU/BDT Migration towards NGN - O.G.S.
towards NGN NGN Network Architecture towards Network Architecture Key Factors: Questions Key Factors: Questions • When to start network migration ? • Short term versus long term versus combined per network segment • Where to start ? • Access versus local versus transit versus applications • How to perform migration ? • Overlay versus substitution versus new sub-networks at growing areas - slide 5 June 2005 ITU/BDT Migration towards NGN - O.G.S.
towards NGN NGN Network Architecture towards Network Architecture Key Factors: Country Status Key Factors: Country Status • Diversity of Geo-scenarios in customers density and development level: homogeneous versus heterogeneous • Development level for accessibility, fixed services, mobile services and video • Aging of installed equipment for Outside Plant, Transmission and Switching • Competition level for fixed and mobile services • Regulatory status - slide 6 June 2005 ITU/BDT Migration towards NGN - O.G.S.
Network Architecture towards Architecture towards NGN NGN Network Content Content • Key factors for the evolution towards NGN • Services and revenue motivations • Network architecture consolidation at transit, local and access levels • Topology and migration • Network optimization based on planning methods and tools • Support to Network Design - slide 7 June 2005 ITU/BDT Migration towards NGN - O.G.S.
towards NGN NGN Network Architecture towards Network Architecture Architecture Consolidation: Topology Architecture Consolidation: Topology Topological changes impact on infrastructure and are slower to implement than technology substitution • Less network nodes and links due to the higher capacity of systems (one order of magnitude). • Same capilarity at access level due to identical customer location • Topological connectivity higher for high capacity nodes and paths for security • High protection level and diversity paths/sources in all high capacity systems, both at functional and physical levels - slide 8 June 2005 ITU/BDT Migration towards NGN - O.G.S.
towards NGN NGN Network Architecture towards Network Architecture Architecture Consolidation: Topology Architecture Consolidation: Topology What changes from current scenario towards target network ? NMC SCP OSS Services SS7 Softswitch Mob Control Distributed Switching Transport/Media LEX/TEX NAS Trunk Access Data Packet gateway gateway ATM/IP Network Other TDM IP/MPLS/CAC Networks LEX Access Access gateway gateway PCM DSL RSU MUX/DSLAM DLC Wireless POTS ISDN gateway HDSL/XDSL - slide 9 June 2005 ITU/BDT Migration towards NGN - O.G.S.
Network Architecture towards towards NGN NGN Network Architecture Architecture Consolidation: Topology Architecture Consolidation: Topology TRANSIT NETWORK TRANSIT NETWORK NATIONAL LAYER NATIONAL LAYER REGIONAL LAYER REGIONAL LAYER LEX LAYER RU NATIONAL/REGIONAL Single-layered NATIONAL/REGIONAL Single-layered LAYER LAYER LAYER TRANSIT NETWORK TRANSIT NETWORK Customers LAYER Structure Simplification LEX/GW LAYER RU LAYER Customers LAYER - slide 10 June 2005 ITU/BDT Migration towards NGN - O.G.S.
towards NGN NGN Network Architecture towards Network Architecture Architecture Consolidation: Access Architecture Consolidation: Access Access dominated by physical infrastructure cost and deployment time • Quick deployment of DSL and Multimedia Services • FO closer to customer when implementing new outside plant or renovating existing one • New Wireless technologies for low density customer scenarios • Shorter LL length than classical network to be prepared for high bandwidth Multimedia services - slide 11 June 2005 ITU/BDT Migration towards NGN - O.G.S.
Network Architecture towards towards NGN NGN Network Architecture Architecture Consolidation: Wireline Architecture Consolidation: Wireline Access Access Typical historical Access Network structure Local: ~ 40 km Distribution: mean value ~1,7 km Drop: mean value ~300 m branching cables SDF drop line . . . . SDF main cable FDF SDF NTBA MDF SDF LEX drop line LEX Local Exchange MDF Main Distribution Frame FDF Feeder Distribution Frame SDF Subscriber Distribution Frame - slide 12 June 2005 ITU/BDT Migration towards NGN - O.G.S.
Network Architecture towards Network Architecture towards NGN NGN Architecture Consolidation: Access evolution Architecture Consolidation: Access evolution Typical Access Network evolution Local: ~ 40 km Distribution: mean value ~1,7 km Drop: mean value ~300 m branching cables SDF drop line . . . . SDF . DLC . FO SDF NTBA Optical Interface DLC LEX/GW . drop line . LEX Local Exchange GW Gateway MDF Main Distribution Frame DLC Digital Loop Carrier SDF Subscriber Distribution Frame FO Fiber Optic DLC - slide 13 June 2005 ITU/BDT Migration towards NGN - O.G.S.
towards NGN NGN Network Architecture towards Network Architecture Architecture Consolidation: Local Architecture Consolidation: Local Dominated by functions migration investment and interoperability • Move from joint switching and control to separated control and media GW • Introduce Multimedia Services at all areas • Optimize number, location of nodes and interfaces among existing and new network • Requires longer time and higher investments due to variety of geo- scenarios and geographical distribution - slide 14 June 2005 ITU/BDT Migration towards NGN - O.G.S.
Network Architecture towards NGN Architecture Consolidation: Local Local Softwitches/ MGCs located in few sites Packet mode network Trunking TEX Layer Trunking TEX Layer IP links gateway gateway Access Access gateway gateway LEX Layer LEX Layer Exchange A subscriber Exchange A “Growth” - slide 15 June 2005 ITU/BDT Migration towards NGN - O.G.S.
towards NGN NGN Network Architecture towards Network Architecture Architecture Consolidation: Core Architecture Consolidation: Core Dominated by high capacity and protection level • Overlay deployment for full coverage in all regions • Quick deployment needed for homogeneous end to end connections • Strong requirements for high quality, protection, diversity paths and survivability • Importance of the optimization for location and interconnection - slide 16 June 2005 ITU/BDT Migration towards NGN - O.G.S.
towards NGN NGN Network Architecture towards Network Architecture : Core Architecture Consolidation : Core Architecture Consolidation Softwitches /MGCs in few sites Regional Level Regional Level Trunking gateway Packet in each regional mode site network IP links short distance LEX Layer LEX Layer Local Exchanges Remote Units - slide 17 June 2005 ITU/BDT Migration towards NGN - O.G.S.
towards NGN NGN Network Architecture towards Network Architecture : Core Architecture Consolidation : Core Architecture Consolidation Softswitches/MGCs located in few sites Regional layer Regional layer Packet IP links mode Long network distance Trunking gateway in each local site Local Exchanges LEX Layer LEX Layer Remote Units - slide 18 June 2005 ITU/BDT Migration towards NGN - O.G.S.
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