Network Softwarisation An Open Development Ecosystem. Telefónica Global CTO

Transcription

1 Network Softwarisation An Open Development Ecosystem Telefónica Global CTO

2 We are evolving towards a Hyper Connected and Intelligent Digital World* The explosion of digital services makes connectivity services more needed than ever Reduction of Time to Market Radical increase of traffic in telco networks Smartphone is changing everything New ways of communication and increasing number of always-on users But the phone service continues to be the only universal service (*) César Alierta, TEF CEO. TEF Digital Investor s Day 2012

3 What are the current limitations of Telco s networks? Long innovation cycles v (2-6 years) Long standardization cycles Scale is needed to introduce innovations Idea!! Telco Operators Equipment Vendors SDOs Demand Critical mass of supporters Drive Standardise AVAILABLE Deploy Sell Implement Time Hardware and Software vertically integrated v Capacity is tied to a function Vendors lock in (it is difficult to switch from one vendor to another when deployments are made) Complex Network Management v Small changes in a network element requires an adaptation of the EMS (Element Management System) Complex stitching of network functions across segments and technologies, since network nodes are tightly coupled to the network segment and technology Difficult IoT v Interoperability tests required per protocol and node

4 We need to adapt and define the change to lead in the Digital era Telco players Very intensive in hardware Capital intensive Software is not a core x Internet players Very intensive in software Can have global impact with not too much capital Hardware is a support, and is located in the network periphery HARDWARE SOFTWARE -

5 Network Softwarisation components Software Defined SDN Networking Network Function NFV Virtualisation Open Innovation

6 NFV ISG vision & objectives NFV ISG vision: Leverage standard IT virtualisation technology to consolidate many network equipment types onto industry standard high volume servers, switches, and storage Traditional Network Model NFV Model DPI BRAS GGSN/SGSN PE Router DPI CG-NAT BRAS Firewall GGSN/ SGSN PE Router VIRTUAL APPLIANCES ORCHESTRATED, AUTOMATIC & REMOTE INSTALL Firewall CG-NAT Session Border Controller STB STANDARD HIGH VOLUME SERVERS

7 Network virtualisation helps reducing network management complexity, as HW can be treated as a pool of resources APPLIANCE APPROACH VIRTUAL APPLIANCE APPROACH Node sizing is determined by the bottleneck of its functionalities Capacity growth often leads to node growth or silo HW purchase HW becomes interchangeable and aggregatable (pool) Resource assignation becomes fully flexible and dynamic SESSION MGT LIMITATIONS PER NODE LEADING TO 2 nd NODE PURCHASE Vs. PROCESSING CAPACITY BECOMES COMMODITY & MANAGED AS A CONTINUUM SESSION MGT LOAD = 95% RESOURCES LOAD = 40% SPARE CAPACITY FOR EXTRA GROWTH (in either functionality) SESSION MGT SWITCHING RESOURCES LOAD = 40% LOAD = 15% SWITCHING

8 Software Defined Networking provides a first mean to improve operation and control of networks SDN Network equipment as Black Boxes Open interfaces (OpenFlow) for instructing the boxes what to do Boxes with autonomous behaviour SDN Decisions are taken out of the box Adapting OSS to manage Black Boxes SDN Simpler OSS to manage the SDN controller

9 SDN: Building Network Apps Based on the abstraction of a high-level, declarative programming language Network administrators specify how they want the network to look, who can talk to whom and how High-level declarations and constraints are translated into low level instructions that each data plane element can implement The hacks that vary by box, by vendor, by version, by deployment not seen by the network admin ;"6. 8' " ( )+9( 7+ ' 9%()"(9(,"+ 0 A>"+2")3 &4+566+%*+ 7"6. 8" 7+%(+)>"+&"9.+ "(?%& (' "()+9( 7+ ' 9%()9%("7+ A" */ ( : +9( 7+ B9.%79/ (+ 0 ; "?". 6+$( &+2")3 &4+566*+ 9( 7+*%' $.9)"+%)*+ =">9?% $&+!"#$%&"' "()*+,..", / ( ", )+2")3 & "6. 8' " ( )+, (*)&9%()*+ ;"?". 6' "( ) "+)>"+2")3 & =">9?% $&+9( 7+ %)*+%()"&@9, "*+ 5( 9.8*%*+9( 7+ 7"*%:(+ 0 ; "<("+=">9?% )>"+2")3 &4+566+

10 A simple equation to define Network Virtualisation: NV = NFV + SDN BNG IPv4 / IPv6 CONTROL Session mgmt TR-069 UPnP DHCP CG-NAT NAT Pool admin NAT ctrl. POOL MGMT NFV SW-defined network functions Separation of HW and SW No vertical integration - HW vendor SW vendor Mgmt vendor Once network elements are SW-based, HW can be managed as a pool of resources SDN Interconnecting Virtual Network Functions (a.k.a. backplane) Separation of control and data plane Easy orchestration with SW domain

11 This new network model will help us to deeply transform our factory Computing principles used in IT world are beginning to be Network Paradigm applied in telecoms by the means of Network Virtualization Change IP as common language for all services, included traditional Telco ones Network virtualisation enabling network reprogrammability & agile service creation Operation Model Change Global E2E vision instead traditional silo model, not linked to monolithic OSS Organization Model Change Breaking the traditional model mapping isolated network domains

12 Pulling the Levers Open collaboration in SDN/NFV has to go beyond pure open-source integration And embrace collaborative development Bring all potential actors onto a common base for app development Service providers, infrastructure manufacturers, software developers, researchers From initial inception to actual deployment Supporting all the phases: design, development, and deployment Taking direct advantage of the technology itself A bootstrapping process Setting the ground for DevOps applied to network services An open ecosystem for network apps

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